ISO/FDIS 9680
(Main)Dentistry — Operating lights
Dentistry — Operating lights
This document specifies requirements and test methods for operating lights used in the dental office and intended for illuminating the oral cavity of patients. It also contains specifications on the instructions for use, marking and packaging. This document applies to operating lights, irrespective of the technology of the light source. This document excludes auxiliary light sources, for example, from dental handpieces and dental headlamps and also operating lights which are specifically designed for use in oral surgery.
Médecine bucco-dentaire — Luminaires opératoires
Le présent document spécifie les exigences et les méthodes d’essai relatives aux luminaires opératoires utilisées dans les cabinets dentaires et destinées à éclairer la cavité buccale des patients. Il contient également des spécifications relatives aux instructions d’utilisation, au marquage et à l’emballage. Le présent document s’applique aux luminaires opératoires, quelle que soit la technologie de la source lumineuse. Le présent document exclut les sources lumineuses auxiliaires, par exemple celles provenant de pièces à main dentaires ou de lampes frontales dentaires, de même que les luminaires opératoires spécifiquement destinés à être utilisés en chirurgie buccale.
General Information
- Status
- Not Published
- Technical Committee
- ISO/TC 106/SC 6 - Dental equipment
- Drafting Committee
- ISO/TC 106/SC 6 - Dental equipment
- Current Stage
- 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
- Start Date
- 09-Feb-2026
- Completion Date
- 09-Feb-2026
Relations
- Effective Date
- 12-Feb-2026
- Effective Date
- 03-Dec-2022
- Effective Date
- 08-Oct-2022
Overview
ISO/FDIS 9680: Dentistry - Operating Lights is an international standard developed by the International Organization for Standardization (ISO). It specifies the performance requirements and test methods for operating lights used in dental offices to illuminate the oral cavity during dental procedures. This standard covers both the functional and safety aspects of dental operating lights, including their optical, mechanical, and electrical properties. Additionally, ISO/FDIS 9680 provides guidelines for instructions for use, marking, and packaging, ensuring clear communication from manufacturers to end-users. The standard is applicable to all types of dental operating lights, regardless of their light source technology, but it specifically excludes auxiliary light sources, such as handpiece lights, headlamps, and lights designed solely for oral surgery.
Key Topics
ISO/FDIS 9680 focuses on several critical aspects of dental operating lights to ensure optimal performance, safety, and usability:
Optical Performance
- Adjustable levels of illuminance with specified minimum and maximum thresholds
- Defined illumination patterns to ensure even lighting across the oral cavity
- Uniformity and smooth transition of illuminance within the pattern
- Chromatic uniformity and appropriate correlated color temperature to avoid color distortion
- Adequate color fidelity for accurate assessment of dental tissue and materials
Safety Considerations
- Limitations on illuminance exposure to the patient's eyes
- Photobiological safety, including limits for ultraviolet and blue light emissions in accordance with relevant IEC standards
- Mechanical safety, ensuring stability, safe positioning, and containment of shattered light sources
Usability and Processing
- Ergonomic controls to minimize accidental activation
- Flexible positioning for comprehensive patient coverage
- Requirements for cleanability and resistance to disinfection agents
- Clear user instructions, markings, and graphical symbols for ease of operation and maintenance
Applications
ISO/FDIS 9680 is essential for dental offices and clinics seeking to select, use, or maintain dental operating lights that meet rigorous international standards. The document has practical value in several scenarios:
Dental Office Equipment Procurement
- Ensures that purchased operating lights meet standardized performance and safety benchmarks
- Facilitates comparisons across different manufacturers and product lines
Regulatory Compliance
- Assists manufacturers and dental clinics in meeting local and international regulatory requirements for dental equipment
- Provides a foundation for product testing and certification
Clinical Practice
- Promotes improved visibility, safety, and comfort for both patients and practitioners
- Reduces risk of photobiological hazards and accidental injury during procedures
Training and Maintenance
- Supports staff education on correct use, cleaning, and maintenance protocols
- Ensures that all end-users have access to clear instructions and labeling
Related Standards
For comprehensive dental equipment safety and performance, ISO/FDIS 9680 should be used in conjunction with several related standards:
- ISO 1942: Dentistry – Vocabulary
- ISO 4073: Information system for the location of dental equipment
- ISO 9687: Graphical symbols for dental equipment
- ISO 14971: Medical devices – Risk management application
- ISO 15223-1: Medical device symbols for information to be supplied by the manufacturer
- ISO 17664-1 and ISO 17664-2: Information for processing medical devices
- IEC 60598-1: General requirements and tests for luminaires
- IEC 60601-1 & IEC 80601-2-60: Safety requirements for medical electrical equipment and dental units
- IEC 62366-1: Usability engineering for medical devices
- IEC 62471: Photobiological safety of lamps and lamp systems
- CIE 224: Colour Fidelity Index
- ISO/CIE 19476: Illuminance and luminance meter characterization
Keywords: Dentistry standards, dental operating lights, ISO/FDIS 9680, dental equipment safety, dental lighting, photobiological safety, usability in dental equipment, dental clinic illumination standards.
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ISO/FDIS 9680 - Dentistry — Operating lights Released:26. 01. 2026
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ISO/FDIS 9680 - Médecine bucco-dentaire — Luminaires opératoires
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Frequently Asked Questions
ISO/FDIS 9680 is a draft published by the International Organization for Standardization (ISO). Its full title is "Dentistry — Operating lights". This standard covers: This document specifies requirements and test methods for operating lights used in the dental office and intended for illuminating the oral cavity of patients. It also contains specifications on the instructions for use, marking and packaging. This document applies to operating lights, irrespective of the technology of the light source. This document excludes auxiliary light sources, for example, from dental handpieces and dental headlamps and also operating lights which are specifically designed for use in oral surgery.
This document specifies requirements and test methods for operating lights used in the dental office and intended for illuminating the oral cavity of patients. It also contains specifications on the instructions for use, marking and packaging. This document applies to operating lights, irrespective of the technology of the light source. This document excludes auxiliary light sources, for example, from dental handpieces and dental headlamps and also operating lights which are specifically designed for use in oral surgery.
ISO/FDIS 9680 is classified under the following ICS (International Classification for Standards) categories: 11.060.20 - Dental equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO/FDIS 9680 has the following relationships with other standards: It is inter standard links to FprEN ISO 9680, ISO/TR 23750:2021, ISO 9680:2021. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO/FDIS 9680 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
FINAL DRAFT
International
Standard
ISO/TC 106/SC 6
Dentistry — Operating lights
Secretariat: DIN
Médecine bucco-dentaire — Luminaires opératoires
Voting begins on:
2026-02-09
Voting terminates on:
2026-04-06
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 106/SC 6
Dentistry — Operating lights
Secretariat: DIN
Médecine bucco-dentaire — Luminaires opératoires
Voting begins on:
Voting terminates on:
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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Published in Switzerland Reference number
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements . 2
4.1 Optical requirements .2
4.1.1 General .2
4.1.2 Adjustable level of illuminance .2
4.1.3 Illumination pattern.2
4.1.4 Illuminance in patient's eyes .4
4.1.5 Chromatic uniformity .4
4.1.6 Chromaticity and correlated colour temperature .4
4.1.7 Shadow .5
4.1.8 Colour fidelity.5
4.1.9 Actinic UV hazard exposure for the skin and eye .6
4.1.10 Near-UV hazard exposure for the eye .6
4.1.11 Retinal blue light hazard exposure .6
4.1.12 Single fault condition for photobiological safety .6
4.1.13 Irradiance (300 nm to 2 500 nm) .6
4.1.14 Compatibility with light-activated restorative materials.7
4.2 Mechanical requirements .7
4.2.1 Operating controls .7
4.2.2 Rotational positioning .7
4.2.3 Stability after positioning .7
4.2.4 Expelled parts .7
4.3 Processing .7
4.4 Electrical requirements.8
4.5 Usability .8
5 Sampling . 8
6 Testing. 8
6.1 General .8
6.2 Visual inspection .8
6.3 Optical tests .8
6.3.1 Test set-up .8
6.3.2 Level of illuminance and illuminance pattern .9
6.3.3 Illuminance uniformity .9
6.3.4 Illuminance in the patient’s eyes .9
6.3.5 Chromatic uniformity .9
6.3.6 Chromaticity and correlated colour temperature .10
6.3.7 Shadow .10
6.3.8 Colour fidelity.11
6.3.9 Actinic UV hazard exposure for the skin and eye .11
6.3.10 Near-UV hazard exposure for the eye . 12
6.3.11 Retinal blue light hazard exposure . 12
6.3.12 Irradiance (300 nm to 2500 nm) .14
6.3.13 Compatibility with light-activated restorative materials.14
7 Manufacturer's instructions . 14
7.1 Documents.14
7.2 Instructions for use .14
7.3 Technical description. 15
8 Packaging.15
iii
8.1 General . 15
8.2 Identification . 15
9 Marking . .15
9.1 Marking on the outside of operating lights . 15
9.2 Graphical symbols .16
Annex A (informative) Additional information for retinal blue light hazard exposure test
method . 17
Annex B (normative) Normalized absorbance of camphorquinone .22
Bibliography .25
iv
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee SC 6, Dental
equipment, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 55, Dentistry, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This fifth edition cancels and replaces the fourth edition (ISO 9680:2021), which has been technically
revised.
The main changes are as follows:
— Clause 4 “Classification” of the fourth edition has been deleted and subsequent clauses have been re-
numbered.
— Clause 5 “Requirements and Recommendations” of the fourth edition has been adapted to Clause 4
“Requirements” and technically updated.
— Clause 6 “Testing” has been technically updated.
— Subclause 7.4 “Mechanical tests” of the fourth edition and all subclauses have been deleted.
— Clause 9 “Marking” has been technically updated.
— Annex A “Transformation formulae” of the fourth edition has been deleted.
— A new informative Annex A on “Additional information for retinal blue light hazard exposure test method”
has been added.
— The normative and bibliographic references have been updated.
— Editorial updates have been made.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
v
Introduction
This document provides dentists and their staff with means to work with optimum visual ease and
comfort in all zones without adversely affecting their perception of colour or causing excessive fatigue or
photobiological injury.
In this document, the safety of an operating light is assessed in combination with its power supply. Such
power supplies may be incorporated in dental units or dental patient chairs.
Any item of equipment recommended by the manufacturer for use in conjunction with an operating light
should not render the equipment unsafe nor affect its qualities adversely.
[1]
IEC 60598-1 has been taken into account during the preparation of this document.
[2]
IEC 60601-1 specifies requirements pertaining to the basic safety and essential performance of medical
[3]
electrical equipment and medical electrical systems. IEC 80601-2-60 specifies requirements pertaining
to the basic safety and essential performance of dental units, dental patient chairs, dental handpieces and
[2] [3]
dental operating lights. The requirements of IEC 60601-1 and IEC 80601-2-60 that are applicable to
operating lights are not duplicated in this document.
vi
FINAL DRAFT International Standard ISO/FDIS 9680:2026(en)
Dentistry — Operating lights
1 Scope
This document specifies requirements and test methods for operating lights used in dental treatment and
intended for illuminating the oral cavity of patients. It also contains specifications on the instructions for
use, marking and packaging.
This document applies to operating lights, irrespective of the technology of the light source.
This document excludes auxiliary light sources and those intended for patient contact, e.g. from dental
handpieces and dental headlamps, fibreoptic intraoral operating lights and operating lights which are
specifically designed for use in oral surgery.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 1942, Dentistry — Vocabulary
ISO 4073, Dentistry — Information system on the location of dental equipment in the working area of the oral
health care provider
ISO 9687, Dentistry — Graphical symbols for dental equipment
ISO 14971, Medical devices — Application of risk management to medical devices
ISO 15223-1, Medical devices — Symbols to be used with information to be supplied by the manufacturer — Part
1: General requirements
ISO 17664-1, Processing of health care products — Information to be provided by the medical device
manufacturer for the processing of medical devices — Part 1: Critical and semi-critical medical devices
ISO 17664-2, Processing of health care products — Information to be provided by the medical device
manufacturer for the processing of medical devices — Part 2: Non-critical medical devices
ISO/CIE 19476, Characterization of the performance of illuminance meters and luminance meters
ISO 21530, Dentistry — Materials used for dental equipment surfaces — Determination of resistance to
chemical disinfectants
IEC 60598-1, Luminaires - Part 1: General requirements and tests
IEC 60601-1, Medical electrical equipment - Part 1: General requirements for basic safety and essential
performance
IEC 62366-1, Medical devices — Part 1: Application of usability engineering to medical devices
IEC 62471, Photobiological safety of lamps and lamp systems
IEC 62471:2006, Photobiological safety of lamps and lamp systems
CIE 224, Colour Fidelity Index for accurate scientific use
CIE S 017, ILV: International Lighting Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1942, ISO 4073, IEC 60598-1,
IEC 60601-1, CIE S 017 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
operating light
device for illuminating the oral cavity of a patient, which includes a fixed base and an adjustable arm
3.2
light-activated restorative material
dental material intended for oral use that incorporates a monomer system, the polymerization of which is
activated by light
4 Requirements
4.1 Optical requirements
4.1.1 General
Optical requirements are specified at a distance of 700 mm. This standardized measurement distance
enables comparison of manufacturer specifications for different operating lights under the same conditions.
For clarity, the design of an operating light may be optimized for other distances and optical properties may
be reported by the manufacturer at additional distances at their discretion.
4.1.2 Adjustable level of illuminance
The level of illuminance shall be adjustable. The adjustment of illuminance may be either continuous or in
discrete levels.
The manufacturer shall provide specifications corresponding to the lowest and highest illuminance settings
for the maximum illuminance on a plane perpendicular to the optical axis at a distance of 700 mm from the
operating light. The manufacturer’s specification for illuminance at the highest illuminance setting shall
be at least 15 000 lx. The measured maximum illuminance values at the lowest and highest illuminance
settings shall be within 20% of their respective specifications.
Test in accordance with 6.2 and 6.3.2.
The requirements of 4.1.2 do not apply to any operating mode(s) intended only for use while handling light-
activated restorative materials.
4.1.3 Illumination pattern
4.1.3.1 Illumination areas and illuminance levels
The illumination pattern shall be measured with the operating light adjusted to the maximum illuminance
level to determine the maximum illuminance, E , and the following iso-illuminance lines in accordance
v,max
with 6.3.2: 0,90 × E , 0,75 × E , 0,50 × E , 0,10 × E and 1 200 lx.
v,max v,max v,max v,max
An area A is defined as the area bounded by the iso-illuminance line corresponding to 75 % of the maximum
illuminance. The border of area A shall be on or outside of an ellipse with a horizontal axis of 50 mm and a
vertical axis of 25 mm, in which the horizontal axis and vertical axis of the ellipse are aligned with the major
axis and minor axis of the illumination pattern, respectively (see Figure 1). The illuminance shall not be less
than 75 % of E throughout the ellipse. Test in accordance with 6.3.2.
v,max
An area B is defined as the area bounded by the iso-illuminance line corresponding to 50 % of the maximum
illuminance. The border of area B shall be on or outside of an ellipse with a horizontal axis of 80 mm and a
vertical axis of 40 mm and with the same axes as the smaller ellipse associated with area A (see Figure 2).
Test in accordance with 6.3.2.
Dimensions in millimetres
Key
A illumination area A
Figure 1 — Example of illumination pattern which satisfies the requirement for area A
Dimensions in millimetres
Key
B illumination area B
Figure 2 — Example of illumination pattern which satisfies the requirement for area B
4.1.3.2 Illuminance uniformity
The illuminance shall decrease in intensity progressively and smoothly toward the pattern edge.
Test in accordance with 6.3.3.
4.1.4 Illuminance in patient's eyes
An area C is defined as the area bounded by the iso-illuminance line corresponding to 90 % of the maximum
illuminance. The level of illuminance at all points on or above a horizontal line 60 mm above the uppermost
point of area C shall not be greater than 1200 lx (see Figure 3).
Test in accordance with 6.3.4.
Dimensions in millimetres
Key
C illumination area C
Figure 3 — Example of illumination pattern which satisfies the requirement for limiting illuminance
in the patient’s eyes
4.1.5 Chromatic uniformity
No perceptible chromatic variation (colour separation) of the light incident upon the measuring screen shall
be visible in area A and area B.
Test in accordance with 6.3.5.
4.1.6 Chromaticity and correlated colour temperature
Over the full range of illuminance levels, the correlated colour temperature shall be in the range of 3 600
K to 6 400 K within areas A and B of the illuminance pattern. D [the perpendicular distance in the 1960
uv
CIE Uniform Chromaticity Scale (u, v) between the Planckian locus and the chromaticity coordinates of the
operating light] shall be within the range of −0,01 to +0,01.
For reference, the chromaticity limits in CIE (u, v) coordinates are depicted in Figure 4.
When the operating light is adjusted to the maximum illuminance level, the correlated colour temperature
should be between 4 500 K and 6 400 K.
Test in accordance with 6.3.6.
The requirements of 4.1.6 do not apply to any operating modes intended only for use while handling light-
activated restorative materials.
Key
v 1960 CIE Uniform Chromaticity Scale v-coordinate
u 1960 CIE Uniform Chromaticity Scale u-coordinate
Planckian locus
Chromaticity limits
Figure 4 — Chromaticity limits in CIE (u, v) coordinates
4.1.7 Shadow
The hard shadow of a disc with 20 mm diameter at a distance of 50 mm shall have a maximum diameter not
greater than 12 mm.
Test in accordance with 6.3.7.
4.1.8 Colour fidelity
For general illumination of the oral cavity, the operating light shall have a general colour fidelity index, R , of
f
at least 85.
NOTE The importance of accurately assessing colour in dental diagnosis and treatment while using an operating
[4]
light supports specifying R as the measure for colour fidelity in this document even though CIE 224 indicates that
f
R is not intended as a universal replacement for the general colour rendering index, R , at this time. The decision to
f a
specify R in this document was made in consultation with CIE.
f
Test in accordance with 6.3.8.
The requirements of 4.1.8 do not apply to any operating modes intended only for use while handling light-
activated restorative materials.
4.1.9 Actinic UV hazard exposure for the skin and eye
The risk group classification of the operating light for actinic ultraviolet hazard (E ) shall be Risk Group 1
s
or lower, as specified in IEC 62471:2006, 6.1, when tested under the conditions specified in 6.3.9. Unless
the operating light is classified as an exempt group for actinic ultraviolet hazard, the permissible exposure
duration, t , per IEC 62471:2006, 4.3.1 shall be calculated in accordance with 6.3.9.
max
Conformity with this requirement shall be verified either by documentation (e.g. test report by the light
source manufacturer) which verifies that all of the light sources used in the operating light do not emit in the
applicable wavelength range (200 nm to 400 nm), or by testing in accordance with 6.3.9.
4.1.10 Near-UV hazard exposure for the eye
The risk group classification of the operating light for near-UV hazard (E ) shall be Risk Group 1 or lower,
UVA
as specified in IEC 62471:2006, 6.1, when tested under the conditions specified in 6.3.10.
Unless the operating light is classified as exempt group for near-UV hazard, the permissible exposure
duration, t , per IEC 62471:2006, 4.3.2 shall be calculated in accordance with 6.3.10.
max
Conformity with this requirement shall be verified either by documentation (e.g. A test report by the light
source manufacturer) which verifies that all of the light sources used in the operating light do not emit in the
applicable wavelength range (315 nm to 400 nm), or by testing in accordance with 6.3.10.
4.1.11 Retinal blue light hazard exposure
The risk group classification for retinal blue light hazard (L ) per IEC 62471:2006, 6.1 shall be Risk Group 1
B
or lower when tested under the conditions specified in 6.3.11.
Unless the operating light is classified as exempt group for retinal blue light hazard, the permissible exposure
duration, t , per IEC 62471:2006, 4.3.3 shall be calculated in accordance with 6.3.11.
max
Test in accordance with 6.3.11.
4.1.12 Single fault condition for photobiological safety
Analysis under single fault condition shall be applied to the requirements for actinic UV exposure for skin
and eye (see 4.1.9), near-UV exposure for the eye (see 4.1.10) and retinal blue light hazard exposure (see
[5]
4.1.11). The operating light shall be considered single fault safe (see IEC 60601-1:2005 , 4.7) if the risk
group classification of the operating light does not exceed Risk Group 2 given in IEC 62471:2006, 6.1 under
single fault condition.
NOTE 1 A single fault condition, such as a short circuit or an open circuit of any component other than a component
with high-integrity characteristics or a software failure, can lead to a higher light emitting diode (LED) driving
current, increased light emission and a higher photobiological risk group classification.
NOTE 2 Analysis of the photobiological safety in single fault condition can be conducted based on the change in
illuminance under single fault condition relative to illuminance under normal conditions if the emission spectrum in
single fault condition is equivalent to the emission spectrum in normal conditions.
4.1.13 Irradiance (300 nm to 2 500 nm)
The irradiance over the wavelength range of 300 nm to 2 500 nm shall be ≤350 W/m at the maximum
illuminance level at a distance of 700 mm from the operating light.
Test in accordance with 6.3.12.
4.1.14 Compatibility with light-activated restorative materials
If the operating light is equipped with a setting intended for use while handling light-activated restorative
materials, the maximum illuminance in this setting shall be at least 6 500 lx and the camphorquinone-
weighted irradiance shall be less than 3,0 W/m when tested under the conditions specified in 6.3.13.
The camphorquinone-weighted irradiance is the integral of the product of the operating light irradiance
spectrum and the normalized absorption spectrum of camphorquinone over the wavelength range of 400
nm to 515 nm (see 6.3.13).
NOTE The photo-initiator systems of commercial dental restorative materials are currently based on one or
more of the following: camphorquinone, 1-phenyl-1,2 propanedione or acylphosphine oxides. Each of these photo-
initiators has a different absorbance spectrum. Since the absorbance spectrum of camphorquinone extends to longer
wavelengths than the other photo-initiators, the overlap with the emission spectrum of operating lights is greatest
with camphorquinone. Therefore, the camphorquinone absorbance spectrum is expected to represent the worst-case
challenge for evaluating possible effects of dental operating lights on light-activated restorative materials.
Test in accordance with 6.3.13.
4.2 Mechanical requirements
4.2.1 Operating controls
Operating controls shall be designed and located to minimize accidental activation. Graphical symbols for
operating controls and performance shall be in accordance with ISO 9687.
4.2.2 Rotational positioning
The operating light should be capable of rotating about the x-, y- and z-axes of the Cartesian coordinate
system to allow the operator maximum flexibility in positioning the operating light while preventing
excessive illuminance in the patient’s eyes.
EXAMPLE 1 Rotation of the operating light about the x-, y- and z-axes of the Cartesian coordinate system can be
achieved by three rotational pivot axes incorporated into the positioning arm of an operating light, even if the three
rotational pivot axes are not perpendicular to one another.
EXAMPLE 2 Rotation of the operating light about the x-, y- and z-axes of the Cartesian coordinate system can be
achieved by a ball-and-socket joint incorporated into the positioning arm of an operating light.
4.2.3 Stability after positioning
Operating lights should be free from apparent drift when positioned.
4.2.4 Expelled parts
The operating light shall be designed to provide protection against the effects of the shattering of its light
source if it is possible for the light source to shatter. This requirement is not relevant for LED light sources.
The operating light shall be designed such that particles from a shattering light source cannot impair safety.
This shall be verified by appropriate risk analysis in accordance with ISO 14971.
4.3 Processing
All exterior touchable parts of the operating light shall be suitable for processing using the agents and
methods recommended by the manufacturer without deterioration of surfaces or labelling.
The manufacturer shall provide information on the processing for the operating light in accordance with
ISO 17664-1 and ISO 17664-2, as applicable. Preferably, the handles should be sterilizable or capable of
accommodating reusable, sterilizable covers.
Testing of resistance against cleaning and disinfection shall be carried out in accordance with ISO 21530.
4.4 Electrical requirements
Operating lights shall be suitable for continuous operation. Conformity shall be verified by checking the
manufacturer’s documentation.
NOTE The designation of continuous operation is relevant to determining the applicability of certain electrical
[2] [3]
requirements of IEC 60601-1 and IEC 80601-2-60 .
4.5 Usability
Usability evaluation shall be carried out following the process described in IEC 62366-1.
Testing shall be carried out in accordance with IEC 62366-1.
5 Sampling
All type tests shall be made on one representative sample of the operating light.
6 Testing
6.1 General
All tests described in this document are type tests.
Testing shall be performed at an ambient temperature of (23 ± 2) °C. The relative humidity shall be between
30 % and 70 %.
All measurements of optical radiation shall be traceable to the International System of Units. See
[6]
ISO/IEC 17025:2017 , 6.5.2 for more information.
6.2 Visual inspection
Visual inspection shall be performed at normal visual acuity without magnification.
6.3 Optical tests
6.3.1 Test set-up
Aim the light beam at a measuring screen, perpendicular to the optical axis, at a distance of 700 mm
measured from the external most forward part of the operating light from which light is emitted.
Adjust the controls for illumination during the tests at the setting of the maximum illuminance level unless
otherwise specified and operate until the irradiance and colour have stabilized, as determined by monitoring
the running average of the measurements, before collecting measurements for the tests specified in 6.3.2
through 6.3.13 unless otherwise specified.
Establish a rectangular coordinate system in the measurement plane with the origin of coordinates (i.e. the
coordinate axis intersection point) centrally placed in the zone of maximum illumination level and with the
x-axis parallel to the major axis of the illumination pattern. If there is a marked cut-off in the y-direction,
take this as the positive direction. If there is not a marked cut-off in the y-direction, arbitrarily select a
direction to be the positive direction.
For tests specifying visual assessment of the illuminance pattern, place a uniform, neutral, diffusely
reflecting, flat white screen in the measurement plane. For tests requiring instrumented measurements,
place the specified detector in the measurement plane unless otherwise specified.
Perform optical tests in a room where light from other sources and reflected light from room surfaces are
negligible.
If the operating light is designed to be used at a target distance other than 700 mm, testing shall also be
performed at the intended operating distance.
6.3.2 Level of illuminance and illuminance pattern
Use the test set-up as described in 6.3.1 with the operating light adjusted to the maximum illuminance level.
Measure the illuminance levels with a photometer calibrated in accordance with ISO/CIE 19476 and having
an acceptance aperture with a diameter of 10 mm.
Moving the photometer within the measurement plane, make measurements at rectilinear coordinates not
more than 5 mm apart, such that all points within the illuminance pattern having an illuminance greater
than 600 lx are measured.
A photometer that can indirectly record the illuminance distribution with one measurement [i.e. an imaging
luminance measurement device (ILMD)] may be used for this purpose. In such a case, the illuminance
pattern is normally projected onto a flat, uniform, diffusely reflecting screen positioned in the measurement
plane and the luminance distribution of the reflected light measured using the ILMD. The uniformity and
directional response of the reflectance characteristics of the screen shall be evaluated and either corrected
for or taken into account in the measurement uncertainties.
Record the measurements and their location. Determine the maximum illuminance, E . Use linear
v,max
interpolation of measurements to calculate and plot the following iso-illuminance lines specified in 4.1.3.1:
0,90 × E , 0,75 × E , 0,50 × E , 0,10 × E and 1 200 lx. Check whether the requirements
v,max v,max v,max v,max
corresponding to the highest illuminance setting given in 4.1.2 and 4.1.3.1 are fulfilled.
Repeat the measurements with the operating light adjusted to the minimum illuminance level. Check
whether the requirement corresponding to the lowest illuminance setting given in 4.1.2 is fulfilled (4.1.3.1 is
not applicable with this setting).
6.3.3 Illuminance uniformity
Use the test set-up as described in 6.3.1.
The requirement specified in 4.1.3.2 is fulfilled if no bright rings or bright spots outside of the central
maximum are visually apparent.
6.3.4 Illuminance in the patient’s eyes
Using the illuminance pattern data from 6.3.2, determine the coordinates of the uppermost point of area
C (i.e. the point along the iso-illuminance line corresponding to 90 % of the maximum illuminance which
is farthest from the horizontal axis in the positive y-direction). Plot a horizontal line 60 mm above the
uppermost point of area C. Check whether the illuminance at any point along or above the horizontal line
exceeds 1200 lx (see Figure 3).
To confirm whether there are any areas of brightness above the horizontal line, place a flat white screen in
the measurement plane. Observe whether there are areas of brightness above the horizontal line 60 mm
above the uppermost point of area C when viewed by a person with normal visual acuity at a distance of 50
cm to 75 cm. If any areas appear brighter than along the horizontal line 60 mm above the uppermost point of
area C, measure the illuminance in those areas using a calibrated photometer, as described in 6.3.2.
Record the measurements and their location. Check whether the requirement specified in 4.1.4 is fulfilled.
6.3.5 Chromatic uniformity
Adjust the room lighting to an illuminance level in the range of 1 % to 3 % of the maximum illuminance of
the operating light, measured at the centre of the measurement plane with a calibrated illuminance meter
oriented toward the room light source. Place a flat white screen in the measurement plane and illuminate
it with the operating light. Use three people with normal colour vision to observe whether there are any
colour non-uniformities within area A and area B when viewed at a distance of 50 cm to 75 cm. The normal
colour vision of the observers shall be verified within the past five years by at least one of the following:
— evaluation for colour vision by a medical practitioner or other appropriately trained person;
— the Ishihara colour vision test, either digitally or physically using colour assessment cards; or
1)
— the Hardy Rand and Rittler (HRR) Pseudoisochromatic Test, 4th Edition , colour vision test, either
digitally or physically using colour assessment cards.
Corrective untinted lenses may be worn.
6.3.6 Chromaticity and correlated colour temperature
Use the test set-up as described in 6.3.1 with the operating light set at maximum light output.
Determine the chromaticity coordinates at the point of maximum illuminance in the measurement plane,
using a tristimulus colourimeter or spectroradiometer and software with the capability to calculate
correlated colour temperature and D . Check whether the measured values for correlated colour
uv
temperature and D meet the requirements specified in 4.1.6.
uv
Repeat the test at each illuminance level of the operating light. If the operating light has continuous
illuminance adjustment or more than three illuminance levels, it is acceptable to test at the maximum
illuminance level, minimum illuminance level and one illuminance level at approximately the midpoint of the
illuminance range.
6.3.7 Shadow
Place the operating light to be tested at a distance of 700 mm from a measuring screen marked with a
rectangular coordinate system (see Figure 5), with the light beam normal to the measuring screen and the
illuminance pattern axes coincident with the measuring screen coordinates.
Place a support column outside the measurement area, supporting a 20 mm diameter disc that is 1-mm thick
and opaque. Position the disc parallel to the measuring screen with the centre of the disc on the axis normal
to the measuring screen coordinates at a distance of 50 mm from the screen. Measure the darkest shadow
cast on the target on the two main axes.
1) The HRR Pseudoisochromatic Test, 4th Edition is the trade name of a product supplied by Good-L
...
Formatted: French (Switzerland)
ISO/DISFDIS 9680
Formatted: French (Switzerland)
ISO/TC 106/SC 6
Secretariat: DIN
Date: 2025-10-152026-01-23
Dentistry — Operating lights
Médecine bucco-dentaire — Luminaires opératoires
DISFDIS stage
Warning for WD’s and CD’s
This document is not an ISO International Standard. It is distributed for review and comment. It is subject to change
without notice and may not be referred to as an International Standard.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.
TThhiiss d drraftaft i iss s suubbmmiitttteded t too a pa pararallel vallel vootte e iinn I ISSOO,, C CEENN.
ISO/DISFDIS 9680:20252026(en)
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Formatted: French (Switzerland)
E-mail: copyright@iso.org
Website: www.iso.org
Formatted: German (Germany)
Formatted: German (Germany)
Published in Switzerland
Formatted: German (Germany)
Field Code Changed
iii
ISO/DISFDIS 9680:20252026(en)
Contents
Foreword . iv
Introduction . iv
Scope . iv
Normative references . iv
Terms and definitions . iv
Requirements . iv
Optical requirements . iv
Mechanical requirements. iv
Processing . iv
Electrical requirements . iv
Usability . iv
Sampling . iv
Testing . iv
General . iv
Visual inspection . iv
Optical tests . iv
Manufacturer's instructions . iv
Documents . iv
Instructions for use . iv
Technical description . iv
Check . iv
Packaging . iv
General . iv
Identification . iv
Marking . iv
Marking on the outside of operating lights . iv
Graphical symbols . iv
(informative) Additional information for retinal blue light hazard exposure test method . iv
(normative) Normalized absorbance of camphorquinone . iv
Bibliography . iv
Foreword . vi
Introduction . viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements . 2
4.1 Optical requirements . 2
4.2 Mechanical requirements . 9
4.3 Processing. 10
4.4 Electrical requirements . 10
4.5 Usability . 10
5 Sampling . 10
iv
ISO/DISFDIS 9680:20252026(en)
6 Testing . 10
6.1 General. 10
6.2 Visual inspection . 10
6.3 Optical tests. 11
7 Manufacturer's instructions . 18
7.1 Documents . 18
7.2 Instructions for use . 18
7.3 Technical description . 19
8 Packaging . 19
8.1 General. 19
8.2 Identification . 19
9 Marking . 20
9.1 Marking on the outside of operating lights . 20
9.2 Graphical symbols . 20
Annex A (informative) Additional information for retinal blue light hazard exposure test
method . 21
Annex B (normative) Normalized absorbance of camphorquinone. 26
Bibliography . 30
v
ISO/DISFDIS 9680:20252026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO [had/had not] received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that this
may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee SC 6, Dental
equipment, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 55, Dentistry, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This fifth edition cancels and replaces the fourth edition (ISO 9680:2021), which has been technically revised.
The main changes are as follows:
— Clause 4 “Classification” of the fourth edition has been deleted and subsequent clauses have been re-
numbered;.
— Clause 5 “Requirements and Recommendations” of the fourth edition has been adapted to Clause 4Clause
4 “Requirements” and technically updated;.
— Clause 6Clause 6 “Testing” has been technically updated;.
— ClauseSubclause 7.4 “Mechanical tests” of the fourth edition and all subclauses have been deleted;.
— Clause 9Clause 9 “Marking” has been technically updated;.
— Annex A “Transformation formulae” of the fourth edition has been deleted;.
— aA new informative Annex AAnnex A on “Additional information for retinal blue light hazard exposure test
method” has been added;.
— theThe normative and bibliographic references have been updated;.
vi
ISO/DISFDIS 9680:20252026(en)
— editorialEditorial updates have been made.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
vii
ISO/DISFDIS 9680:20252026(en)
Introduction
This document provides dentists and their staff with means to work with optimum visual ease and comfort in
all zones without adversely affecting their perception of colour or causing excessive fatigue or photobiological
injury.
In this document, the safety of an operating light is assessed in combination with its power supply. Such power
supplies may be incorporated in dental units or dental patient chairs.
Any item of equipment recommended by the manufacturer for use in conjunction with an operating light
should not render the equipment unsafe nor affect its qualities adversely.
[1]
IEC 60598-1IEC 60598-1 has been taken into account during the preparation of this document.
[2]
IEC 60601-1IEC 60601-1 specifies requirements pertaining to the basic safety and essential performance of
[1] [3]
medical electrical equipment and medical electrical systems. IEC 80601-2-60 IEC 80601-2-60 specifies
requirements pertaining to the basic safety and essential performance of dental units, dental patient chairs,
[1]
dental handpieces and dental operating lights. Requirements of IEC 60601-1 and IEC 80601-2-60 The
[2] [3]
requirements of IEC 60601-1 and IEC 80601-2-60 that are applicable to operating lights are not
duplicated in this document.
viii
ISO/DISFDIS 9680:20252026(en)
Dentistry — Operating lights
1 Scope
This document specifies requirements and test methods for operating lights used in dental treatment and
intended for illuminating the oral cavity of patients. It also contains specifications on the instructions for use,
marking and packaging.
This document applies to operating lights, irrespective of the technology of the light source.
This document excludes auxiliary light sources and those intended for patient contact, e.g. from dental
handpieces and dental headlamps, fibreoptic intraoral operating lightlights and also operating lights which
are specifically designed for use in oral surgery.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 1942, Dentistry — Vocabulary
ISO 4073, Dentistry — Information system on the location of dental equipment in the working area of the oral
health care provider
ISO 9687, Dentistry — Graphical symbols for dental equipment
ISO 14971, Medical devices — Application of risk management to medical devices
ISO 15223-1, Medical devices — Symbols to be used with information to be supplied by the manufacturer — Part
1: General requirements
ISO 17664-1, Processing of health care products — Information to be provided by the medical device
manufacturer for the processing of medical devices — Part 1: Critical and semi-critical medical devices
ISO 17664-2, Processing of health care products — Information to be provided by the medical device
manufacturer for the processing of medical devices — Part 2: Non-critical medical devices
ISO/CIE 19476, Characterization of the performance of illuminance meters and luminance meters
ISO 21530, Dentistry — Materials used for dental equipment surfaces — Determination of resistance to chemical
disinfectants
IEC 60598-1, Luminaires - Part 1: General requirements and tests
IEC 60601-1:2005, Medical electrical equipment - Part 1: General requirements for basic safety and essential
performance
IEC 60601-1, Medical electrical equipment - Part 1: General requirements for basic safety and essential
performance
IEC 60601-1:2005/AMD1:2012, Amendment 1 - Medical electrical equipment - Part 1: General requirements for
basic safety and essential performance
ISO/DISFDIS 9680:20252026(en)
IEC 60601-1:2005/AMD2:2020, Amendment 2 - Medical electrical equipment - Part 1: General requirements for
basic safety and essential performance
IEC 62366-1, Medical devices — Part 1: Application of usability engineering to medical devices
IEC 62471, Photobiological safety of lamps and lamp systems
IEC 62471:2006, Photobiological safety of lamps and lamp systems
CIE 224, Colour Fidelity Index for accurate scientific use
CIE S 017 , ILV: International Lighting Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1942 , ISO 4073 , IEC 60598-1 , IEC
60601-1, CIE S 017 as well asand the following apply.
ISO and IEC maintain terminologicalterminology databases for use in standardization at the following
addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
Formatted: English (United States)
operating light
device for illuminating the oral cavity of a patient, which includes a fixed base and an adjustable arm
3.2
Formatted: English (United States)
light-activated restorative material
dental material intended for oral use that incorporates a monomer system, the polymerization of which is
activated by light
4 Requirements
4.1 Optical requirements
4.1.1 General
Optical requirements are specified at a distance of 700 mm. This standardized measurement distance enables
comparison of manufacturer specifications for different operating lights under the same conditions. For
clarity, the design of an operating light may be optimized for other distances and optical properties may be
reported by the manufacturer at additional distances at their discretion.
4.1.2 Adjustable level of illuminance
The level of illuminance shall be adjustable. The adjustment of illuminance may be either continuous or in
discrete levels.
The manufacturer shall provide specifications corresponding to the lowest and highest illuminance settings
for the maximum illuminance on a plane perpendicular to the optical axis at a distance of 700 mm from the
operating light. The manufacturer’s specification for illuminance at the highest illuminance setting shall be at
least 15 000 lx. The measured maximum illuminance values at the lowest and highest illuminance settings
shall be within 20% of their respective specifications.
ISO/DISFDIS 9680:20252026(en)
Test in accordance with 6.2 and 6.3.2.
The requirements of 4.1.2 do not apply to any operating mode(s) intended only for use while handling light-
activated restorative materials.
4.1.3 Illumination pattern
4.1.3.1 Illumination areas and illuminance levels
The illumination pattern shall be measured with the operating light adjusted to the maximum illuminance
level to determine the maximum illuminance, Ev,max, and the following iso-illuminance lines in accordance with
6.3.2: 0,90 × E , 0,75 × E , 0,50 × E , 0,10 × E and 1 200 lx.
v,max v,max v,max v,max
An area A is defined as the area bounded by the iso-illuminance line corresponding to 75 % of the maximum
illuminance. The border of area A shall be on or outside of an ellipse with a horizontal axis of 50 mm and a
vertical axis of 25 mm, in which the horizontal axis and vertical axis of the ellipse are aligned with the major
axis and minor axis of the illumination pattern, respectively (see Figure 1). The illuminance shall not be less
throughout the ellipse. Test in accordance with 6.3.2.
than 75 % of Ev,max
An area B is defined as the area bounded by the iso-illuminance line corresponding to 50 % of the maximum
illuminance. The border of area B shall be on or outside of an ellipse with a horizontal axis of 80 mm and a
vertical axis of 40 mm and with the same axes as the smaller ellipse associated with area A (see Figure 2 ).).
Test in accordance with 6.3.2.
Dimensions in millimetres
Key
A illumination area A
Figure 1
ISO/DISFDIS 9680:20252026(en)
Figure 1 — Example of illumination pattern which satisfies the requirement for area A
Dimensions in millimetres
Key
B illumination area B
Figure 2
Figure 2 — Example of illumination pattern which satisfies the requirement for area B
4.1.3.2 Illuminance uniformity
The illuminance shall decrease in intensity progressively and smoothly toward the pattern edge.
Test in accordance with 6.3.3.
ISO/DISFDIS 9680:20252026(en)
4.1.4 Illuminance in patient's eyes
An area C is defined as the area bounded by the iso-illuminance line corresponding to 90 % of the maximum
Formatted: Font: Not Italic
illuminance. The level of illuminance at all points on or above a horizontal line 60 mm above the uppermost
point of area C shall not be greater than 1200 lx (see Figure 3 ).).
Test in accordance with 6.3.4.
Dimensions in millimetres
Key
C illumination area C
Figure 3
ISO/DISFDIS 9680:20252026(en)
Figure 3 — Example of illumination pattern which satisfies the requirement for limiting illuminance
in the patient’s eyes
4.1.5 Chromatic uniformity
No perceptible chromatic variation (colour separation) of the light incident upon the measuring screen shall
be visible in area A and area B.
Test in accordance with 6.3.5.
4.1.6 Chromaticity and correlated colour temperature
Over the full range of illuminance levels, the correlated colour temperature shall be in the range of 3 600 K to
6 400 K within areas A and B of the illuminance pattern. D [the perpendicular distance in the 1960 CIE
uv
Uniform Chromaticity Scale (u, v) between the Planckian locus and the chromaticity coordinates of the
operating light] shall be within the range of −0,01 to +0,01.
For reference, the chromaticity limits in CIE (u, v) coordinates are depicted in Figure 4.
Preferably, whenWhen the operating light is adjusted to the maximum illuminance level, the correlated colour
temperature should be between 4 500 K and 6 400 K.
Test in accordance with 6.3.6.
The requirements of 4.1.6 do not apply to any operating modes intended only for use while handling light-
activated restorative materials.
ISO/DISFDIS 9680:20252026(en)
Key
v 1960 CIE Uniform Chromaticity Scale v-coordinate
Formatted: Font: Italic
u 1960 CIE Uniform Chromaticity Scale u-coordinate
Formatted: Font: Italic
Planckian locus
Chromaticity limits
Figure 4 — Chromaticity limits in CIE (u, v) coordinates
4.1.7 Shadow
The hard shadow of a disc with 20 mm diameter at a distance of 50 mm shall have a maximum diameter not
greater than 12 mm.
Test in accordance with 6.3.7.
ISO/DISFDIS 9680:20252026(en)
4.1.8 Colour fidelity
For general illumination of the oral cavity, the operating light shall have a general colour fidelity index, Rf, of
at least 85.
NOTE The importance of accurately assessing colour in dental diagnosis and treatment while using an operating
[4]
light supports specifying Rf as the measure for colour fidelity in this document even though CIE 224CIE 224 indicates
that R is not intended as a universal replacement for the general colour rendering index, R , at this time. The decision to
f a
specify Rf in this document was made in consultation with CIE.
Test in accordance with 6.3.8 .
The requirements of 4.1.8 do not apply to any operating modes intended only for use while handling light-
activated restorative materials.
4.1.9 Actinic UV hazard exposure for the skin and eye
Formatted: English (United States)
The risk group classification of the operating light for actinic ultraviolet hazard (E ) shall be Risk Group 1 or
s
lower, as specified in IEC 62471:2006, 6.1, when tested under the conditions specified in 6.3.9. Unless the
operating light is classified as an exempt group for actinic ultraviolet hazard, the permissible exposure
duration, tmax, per IEC 62471:2006 , 4.3.1 shall be calculated in accordance with 6.3.9.
Conformity with this requirement shall be verified either by documentation (e.g. test report by the light source
manufacturer) which verifies that all of the light sources used in the operating light do not emit in the
applicable wavelength range (200 nm to 400 nm), or by testing in accordance with 6.3.9.
4.1.10 Near-UV hazard exposure for the eye
Formatted: English (United States)
The risk group classification of the operating light for near-UV hazard (EUVA) shall be Risk Group 1 or lower, as
specified in IEC 62471:2006, 6.1, when tested under the conditions specified in 6.3.10.
Unless the operating light is classified as exempt group for near-UV hazard, the permissible exposure duration,
t , per IEC 62471:2006, 4.3.2 shall be calculated in accordance with 6.3.10.
max
Conformity with this requirement shall be verified either by documentation (e.g. A test report by the light
source manufacturer) which verifies that all of the light sources used in the operating light do not emit in the
applicable wavelength range (315 nm to 400 nm), or by testing in accordance with 6.3.10.
4.1.11 Retinal blue light hazard exposure
The risk group classification for retinal blue light hazard (L ) per IEC 62471:2006, 6.1 shall be Risk Group 1
B
or lower when tested under the conditions specified in 6.3.11.
Unless the operating light is classified as exempt group for retinal blue light hazard, the permissible exposure
duration, t , per IEC 62471:2006, 4.3.3 shall be calculated in accordance with 6.3.11.
max
Test in accordance with 6.3.11.
4.1.12 Single fault condition for photobiological safety
Formatted: English (United States)
Analysis under single fault condition shall be applied to the requirements for actinic UV exposure for skin and
eye (see 4.1.9 ),), near-UV exposure for the eye (see 4.1.10 )) and retinal blue light hazard exposure (see 4.1.11
).). The operating light shall be considered single fault safe (IEC 60601-1:2005, IEC 60601-
[5]
1:2005/AMD1:2012 & IEC 60601-1:2005/AMD2:2020,see IEC 60601-1 , 4.7) if the risk group classification
of the operating light does not exceed Risk Group 2 given inIECin IEC 62471:2006, 6.1 under single fault
condition.
ISO/DISFDIS 9680:20252026(en)
NOTE 1 A single fault condition, such as a short circuit or an open circuit of any component other than a component
with high-integrity characteristics or a software failure, can lead to a higher light emitting diode (LED) driving current,
increased light emission and a higher photobiological risk group classification.
NOTE 2 Analysis of the photobiological safety in single fault condition can be conducted based on the change in
illuminance under single fault condition relative to illuminance under normal conditions if the emission spectrum in
single fault condition is equivalent to the emission spectrum in normal conditions.
4.1.13 Irradiance (300 nm to 2 500 nm)
The irradiance over the wavelength range of 300 nm to 2 500 nm shall be ≤350 W/m at the maximum
illuminance level at a distance of 700 mm from the operating light.
Test in accordance with 6.3.12.
4.1.14 Compatibility with light-activated restorative materials
Formatted: English (United States)
If the operating light is equipped with a setting intended for use while handling light-activated restorative
materials, the maximum illuminance in this setting shall be at least 6 500 lx and the camphorquinone-
weighted irradiance shall be less than 3,0 W/m when tested under the conditions specified in 6.3.13. The
camphorquinone-weighted irradiance is the integral of the product of the operating light irradiance spectrum
and the normalized absorption spectrum of camphorquinone over the wavelength range of 400 nm to 515 nm
(see 6.3.13).
NOTE The photo-initiator systems of commercial dental restorative materials are currently based on one or more
of the following: camphorquinone, 1-phenyl-1,2 propanedione or acylphosphine oxides. Each of these photo-initiators
has a different absorbance spectrum. Since the absorbance spectrum of camphorquinone extends to longer wavelengths
than the other photo-initiators, the overlap with the emission spectrum of operating lights is greatest with
camphorquinone. Therefore, the camphorquinone absorbance spectrum is expected to represent the worst-case
challenge for evaluating possible effects of dental operating lights on light-activated restorative materials.
Test in accordance with 6.3.13.
4.2 Mechanical requirements
4.2.1 Operating controls
Operating controls shall be designed and located to minimize accidental activation. Graphical symbols for
operating controls and performance shall be in accordance with ISO 9687.
4.2.2 Rotational positioning
The operating light should be capable of rotating about the x-, y- and z-axes of the Cartesian coordinate system
to allow the operator maximum flexibility in positioning the operating light while preventing excessive
illuminance in the patient’s eyes.
EXAMPLE 1 Rotation of the operating light about the x-, y- and z-axes of the Cartesian coordinate system can be
achieved by three rotational pivot axes incorporated into the positioning arm of an operating light, even if the three
rotational pivot axes are not perpendicular to one another.
EXAMPLE 2 Rotation of the operating light about the x-, y- and z-axes of the Cartesian coordinate system can be
achieved by a ball-and-socket joint incorporated into the positioning arm of an operating light.
4.2.3 Stability after positioning
Operating lights should be free from apparent drift when positioned.
ISO/DISFDIS 9680:20252026(en)
4.2.4 Expelled parts
The operating light shall be designed to provide protection against the effects of the shattering of its light
source if it is possible for the light source to shatter. This requirement is not relevant for LED light sources.
The operating light shall be designed such that particles from a shattering light source cannot impair safety.
This shall be verified by appropriate risk analysis in accordance with ISO 14971.
4.3 Processing
All exterior touchable parts of the operating light shall be suitable for processing using the agents and methods
recommended by the manufacturer without deterioration of surfaces or labelling.
The manufacturer shall provide information on the processing for the operating light in accordance with ISO
17664-1 and ISO 17664-2, as applicable. Preferably, the handles should be sterilizable or capable of
accommodating reusable, sterilizable covers.
Testing of resistance against cleaning and disinfection shall be carried out in accordance with ISO 21530.
4.4 Electrical requirements
Operating lights shall be suitable for continuous operation. Conformity shall be verified by checking the
manufacturer’s documentation.
NOTE The designation of continuous operation is relevant to determining the applicability of certain electrical
[2] [1 [3
requirements of IEC 60601-1IEC 60601-1 and IEC 80601-2-60 ].
Formatted: Not Superscript/ Subscript
Field Code Changed
4.5 Usability
Usability evaluation shall be carried out following the process described in IEC 62366-1.
Testing shall be carried out in accordance with IEC 62366-1 .
5 Sampling
All type tests shall be made on one representative sample of the operating light.
6 Testing
6.1 General
All tests described in this document are type tests.
Testing shall be performed at an ambient temperature of (23 ± 2) °C. The relative humidity shall be between
30 % and 70 %.
All measurements of optical radiation shall be traceable to the international systemInternational System of
[2 [6
unitsUnits. See ISO/IEC 17025:2017 ], 6.5.2 for more information.
Formatted: Not Superscript/ Subscript
Field Code Changed
6.2 Visual inspection
Visual inspection shall be performed at normal visual acuity without magnification.
ISO/DISFDIS 9680:20252026(en)
6.3 Optical tests
6.3.1 Test set-up
Aim the light beam at a measuring screen, perpendicular to the optical axis, at a distance of 700 mm measured
from the external most forward part of the operating light from which light is emitted.
Adjust the controls for illumination during the tests at the setting of the maximum illuminance level unless
otherwise specified and operate until the irradiance and colour have stabilized, as determined by monitoring
the running average of the measurements, before collecting measurements for the tests specified in 6.3.2
through 6.3.13 unless otherwise specified.
Establish a rectangular coordinate system in the measurement plane with the origin of coordinates (i.e. the
coordinate axis intersection point) centrally placed in the zone of maximum illumination level and with the x-
axis parallel to the major axis of the illumination pattern. If there is a marked cut-off in the y-direction, take
this as the positive direction. If there is not a marked cut-off in the y-direction, arbitrarily select a direction to
be the positive direction.
For tests specifying visual assessment of the illuminance pattern, place a uniform, neutral, diffusely reflecting,
flat white screen in the measurement plane. For tests requiring instrumented measurements, place the
specified detector in the measurement plane unless otherwise specified.
Perform optical tests in a room where light from other sources and reflected light from room surfaces are
negligible.
If the operating light is designed to be used at a target distance other than 700 mm, testing shall also be
performed at the intended operating distance.
6.3.2 Level of illuminance and illuminance pattern
Formatted: English (United States)
Use the test set-up as described in 6.3.1 with the operating light adjusted to the maximum illuminance level.
Measure the illuminance levels with a photometer calibrated in accordance with ISO/CIE 19476 and having
an acceptance aperture with a diameter of 10 mm.
Moving the photometer within the measurement plane, make measurements at rectilinear coordinates not
more than 5 mm apart, such that all points within the illuminance pattern having an illuminance greater than
600 lx are measured.
A photometer that can indirectly record the illuminance distribution with one measurement [i.e. an imaging
luminance measurement device (ILMD)] may be used for this purpose. In such a case, the illuminance pattern
is normally projected onto a flat, uniform, diffusely reflecting screen positioned in the measurement plane and
the luminance distribution of the reflected light measured using the ILMD. The uniformity and directional
response of the reflectance characteristics of the screen shall be evaluated and either corrected for or taken
into account in the measurement uncertainties.
Record the measurements and their location. Determine the maximum illuminance, Ev,max. Use linear
interpolation of measurements to calculate and plot the following iso-illuminance lines specified in 4.1.3.1:
0,90 × E , 0,75 × E , 0,50 × E , 0,10 × E and 1 200 lx. Check whether the requirements
v,max v,max v,max v,max
corresponding to the highest illuminance setting given in 4.1.2 and 4.1.3.1 are fulfilled.
Repeat the measurements with the operating light adjusted to the minimum illuminance level. Check whether
the requirement corresponding to the lowest illuminance setting given in 4.1.2 is fulfilled (4.1.3.1 are fu is not
applicable with this setting).
ISO/DISFDIS 9680:20252026(en)
6.3.3 Illuminance uniformity
Use the test set-up as described in 6.3.1.
The requirement specified in 4.1.3.2 is fulfilled if no bright rings or bright spots outside of the central
maximum are visually apparent.
6.3.4 Illuminance in the patient’s eyes
Using the illuminance pattern data from 6.3.2, determine the coordinates of the uppermost point of area C (i.e.
Formatted: Font: Not Italic
the point along the iso-illuminance line corresponding to 90 % of the maximum illuminance which is farthest
from the horizontal axis in the positive y-direction). Plot a horizontal line 60 mm above the uppermost point
of area C. Check whether the illuminance at any point along or above the horizontal line exceeds 1200 lx (see
Formatted: Font: Not Italic
Figure 3).
To confirm whether there are any areas of brightness above the horizontal line, place a flat white screen in the
measurement plane. Observe whether there are areas of brightness above the horizontal line 60 mm above
the uppermost point of area C when viewed by a person with normal visual acuity at a distance of 50 cm to 75
cm. If any areas appear brighter than along the horizontal line 60 mm above the uppermost point of area C,
Formatted: Font: Not Italic
measure the illuminance in those areas using a calibrated photometer, as described above.in 6.3.2.
Record the measurements and their location. Check whether the requirement specified in 4.1.4 is fulfilled.
6.3.5 Chromatic uniformity
Adjust the room lighting to an illuminance level in the range of 1 % to 3 % of the maximum illuminance of the
operating light, measured at the centre of the measurement plane with a calibrated illuminance meter
oriented toward the room light source. Place a flat white screen in the measurement plane and illuminate it
with the operating light. Use three people with normal colour vision to observe whether there are any colour
non-uniformities within area A and area B when viewed at a distance of 50 cm to 75 cm. The normal colour
vision of the observers shall be verified within the past five years by at least one of the following:
— evaluation for colour vision by a medical practitioner or other appropriately trained person;
— the Ishihara colour vision test, either digitally or physically using colour assessment cards; or
1)
— the Hardy Rand and Rittler (HRR) Pseudoisochromatic Test, 4th Edition , colour vision test, either
digitally or physically using colour assessment cards .
Corrective untinted lenses may be worn.
6.3.6 Chromaticity and correlated colour temperature
Use the test set-up as described in 6.3.1 with the operating light set at maximum light output.
Determine the chromaticity coordinates at the point of maximum illuminance in the measurement plane, using
a tristimulus colourimeter or spectroradiometer and software with the capability to calculate correlated
colour temperature and D . Check whether the measured values for correlated colour temperature and D
uv uv
meet the requirements specified in 4.1.6.
1)
The HRR Pseudoisochromatic Test, 4th Edition is the trade name of a product supplied by Good-Lite Co, USA. This
information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the
product named. Equivalent products may be used if they can be shown to lead to the same results.
ISO/DISFDIS 9680:20252026(en)
Repeat the test at each illuminance level of the operating light. If the operating light has continuous
illuminance adjustment or more than three illuminance levels, it is acceptable to test at the maximum
illuminance level, minimum illuminance level and one illuminance level at approximately the midpoint of the
illuminance range.
6.3.7 Shadow
Place the operating light to be tested at a distance of 700 mm from a measuring screen marked with a
rectangular coordinate system (see Figure 5), with the light beam normal to the measuring screen and the
illuminance pattern axes coincident with the measuring screen coordinates.
Place a support column outside the measurement area, supporting a 20 mm diameter disc that is 1-mm thick
and opaque. Position the disc parallel to the measuring screen with the centre of the disc on the axis normal
to the measuring screen coordinates at a distance of 50 mm from the screen. Measure the darkest shadow cast
on the target on the two main axes.
ISO/DISFDIS 9680:20252026(en)
Dimensions in millimetres
Key
1 operating light, or portion thereof capable of producing the illuminance pattern
2 pole
3 sliding ring for adjustment
4 screen
5 disc (opaque): 20 mm diameter × 1 mm thick
6 stem
ISO/DISFDIS 9680:20252026(en)
Figure 5 — Device for determination of shadow reduction
6.3.8 Colour fi
...
PROJET FINAL
Norme
internationale
ISO/TC 106/SC 6
Médecine bucco-dentaire —
Secrétariat: DIN
Luminaires opératoires
Début de vote:
Dentistry — Operating lights 2026-02-09
Vote clos le:
2026-04-06
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
DU POINT DE VUE DE LEUR POSSI BILITÉ DE DEVENIR DES
NORMES POUVANT
SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
NATIONALE.
Numéro de référence
PROJET FINAL
Norme
internationale
ISO/TC 106/SC 6
Médecine bucco-dentaire —
Secrétariat: DIN
Luminaires opératoires
Début de vote:
Dentistry — Operating lights
2026-02-09
Vote clos le:
2026-04-06
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
DOCUMENT PROTÉGÉ PAR COPYRIGHT
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
© ISO 2026 INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
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NORMES POUVANT
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SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
NATIONALE.
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Web: www.iso.org
Publié en Suisse Numéro de référence
ii
Sommaire Page
Avant-propos .v
Introduction .vii
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 2
4 Exigences . 2
4.1 Exigences optiques .2
4.1.1 Généralités .2
4.1.2 Niveau d’éclairement réglable .2
4.1.3 Diagramme d’éclairement .3
4.1.4 Éclairement des yeux du patient .4
4.1.5 Uniformité chromatique .5
4.1.6 Chromaticité et température de couleur proximale .5
4.1.7 Ombres .6
4.1.8 Fidélité des couleurs .6
4.1.9 Risque lié aux expositions aux rayonnements UV actiniques pour la peau et l’œil .7
4.1.10 Risque lié aux expositions dans le proche UV pour l’œil .7
4.1.11 Risque rétinien lié aux expositions à la lumière bleue .7
4.1.12 Conditions de premier défaut pour la sécurité photobiologique .7
4.1.13 Éclairement énergétique (300 nm à 2 500 nm) .8
4.1.14 Compatibilité avec les produits de restauration photo-activés .8
4.2 Exigences mécaniques .8
4.2.1 Dispositifs de commande .8
4.2.2 Positionnement par rotation .8
4.2.3 Stabilité après positionnement .8
4.2.4 Parties projetées .8
4.3 Traitement .9
4.4 Exigences électriques .9
4.5 Aptitude à l’utilisation .9
5 Échantillonnage . 9
6 Méthodes d’essai . 9
6.1 Généralités .9
6.2 L’examen visuel .9
6.3 Essais optiques .9
6.3.1 Configuration d’essai .9
6.3.2 Niveau d’éclairement et diagramme d’éclairement .10
6.3.3 Uniformité d’éclairement .10
6.3.4 Éclairement des yeux du patient .10
6.3.5 Uniformité chromatique .11
6.3.6 Chromaticité et température de couleur proximale .11
6.3.7 Ombres .11
6.3.8 Fidélité des couleurs . 12
6.3.9 Risque lié aux expositions aux rayonnements UV actiniques pour la peau et l’œil . 12
6.3.10 Risque lié aux expositions dans le proche UV pour l’œil . 13
6.3.11 Risque rétinien lié aux expositions à la lumière bleue .14
6.3.12 Éclairement énergétique (300 nm à 2 500 nm) . 15
6.3.13 Compatibilité avec les produits de restauration photo-activés . 15
7 Instructions du fabricant . 16
7.1 Documentation .16
7.2 Instructions d’utilisation .16
7.3 Description technique .16
8 Emballage . 17
iii
8.1 Généralités .17
8.2 Identification .17
9 Marquage . 17
9.1 Marquage appliqué sur l’extérieur des luminaires opératoires .17
9.2 Symboles graphiques .17
Annexe A (informative) Informations supplémentaires pour la méthode d’essai du risque
rétinien lié aux expositions à la lumière bleue .18
Annexe B (normative) Absorbance normalisée de la camphorquinone.23
Bibliographie .26
iv
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes nationaux
de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est en général
confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude a le droit de faire
partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l’ISO participent également aux travaux. L’ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation
d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité et à l’applicabilité de
tout droit de brevet revendiqué à cet égard. À la date de publication du présent document, l’ISO n’avait pas
reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise en application. Toutefois,
il y a lieu d’avertir les responsables de la mise en application du présent document que des informations
plus récentes sont susceptibles de figurer dans la base de données de brevets, disponible à l’adresse
www.iso.org/brevets. L’ISO ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits de
propriété et averti de leur existence.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données pour
information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l’ISO liés à l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion de
l’ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles techniques au
commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaboré par le comité ISO/TC 106, Médecine bucco-dentaire, sous-comité SC 6,
Matériel dentaire, en collaboration avec le comité technique CEN/TC 55, Médecine bucco-dentaire, du Comité
européen de normalisation (CEN), conformément à l’Accord de coopération technique entre l’ISO et le CEN
(Accord de Vienne).
Cette cinquième édition annule et remplace la quatrième (ISO 9680:2021), qui a fait l’objet d’une révision
technique.
Les principales modifications sont les suivantes:
— L’Article 4 “Classification” de la quatrième édition a été supprimé et les articles suivants ont été re-
numérotés.
— L’Article 5 “Exigences et recommandations” de la quatrième édition a été adapté à l’Article 4 “Exigences”
et mis à jour techniquement.
— L’Article 6 “Essais” a fait l’objet d’une mise à jour technique.
— Le paragraphe 7.4 “Essais mécaniques” de la quatrième édition et tous les paragraphes ont été supprimés.
— L’Article 9 “Marquage” a fait l’objet d’une mise à jour technique.
— L’Annexe A “Formules de transformation” de la quatrième édition a été supprimée.
— Une nouvelle Annexe A informative intitulée “Informations supplémentaires pour la méthode d’essai du
risque rétinien lié aux expositions à la lumière bleue” a été ajoutée.
— Mise à jour des références normatives et bibliographiques.
— Des mises à jour rédactionnelles ont été effectuées.
v
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes se
trouve à l’adresse www.iso.org/fr/members.html.
vi
Introduction
Le présent document fournit aux dentistes et à leurs équipes des moyens de travailler avec un bien-être et
un confort visuels maximaux dans toutes les zones, sans affecter négativement leur perception de la couleur,
ni provoquer une fatigue excessive ou des lésions photobiologiques.
Dans le présent document, la sécurité d’un luminaire opératoire est évaluée conjointement avec son
alimentation électrique. Ces sources d’alimentation peuvent être intégrées dans les unités dentaires ou dans
les fauteuils dentaires.
Il convient que tout élément de matériel recommandé par le fabricant pour une utilisation en association avec
un luminaire opératoire ne rende pas le matériel dangereux et n’affecte pas négativement ses performances.
[1]
L’IEC 60598-1 a été prise en compte lors de la préparation du présent document.
[2]
L’IEC 60601-1 spécifie les exigences relatives à la publication fondamentale de sécurité et aux performances
[3]
essentielles des appareils et systèmes électromédicaux. L’IEC 80601-2-60 spécifie les exigences relatives
à la publication fondamentale de sécurité et aux performances essentielles des unités dentaires, des
fauteuils dentaires, des pièces à main dentaires et des luminaires opératoires dentaires. Les exigences de
[2] [3]
l’ IEC 60601-1 et de l’IEC 80601-2-60 applicables aux luminaires opératoires ne sont pas dupliquées
dans le présent document.
vii
PROJET FINAL Norme internationale ISO/FDIS 9680:2026(fr)
Médecine bucco-dentaire — Luminaires opératoires
1 Domaine d’application
Le présent document spécifie les exigences et les méthodes d’essai relatives aux luminaires opératoires
utilisées durant un traitement dentaire et destinées à éclairer la cavité buccale des patients. Il contient
également des spécifications relatives aux instructions d’utilisation, au marquage et à l’emballage.
Le présent document s’applique aux luminaires opératoires, quelle que soit la technologie de la source
lumineuse.
Le présent document exclut les sources lumineuses auxiliaires et celles destinées à être en contact avec le
patient, par exemple celles provenant des pièces à main dentaires et des lampes frontales dentaires, des
luminaires opératoires intra-buccaux à fibre optique et des luminaires opératoires spécifiquement conçus
pour une utilisation en chirurgie buccale.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique. Pour
les références non datées, la dernière édition du document de référence s’applique (y compris les éventuels
amendements).
ISO 1942, Médecine bucco-dentaire — Vocabulaire
ISO 4073, Art dentaire — Système d'informations relatif à la localisation du matériel dentaire sur le poste de
travail du prestataire de soins bucco-dentaires
ISO 9687, Médecine bucco-dentaire — Symboles graphiques pour matériel dentaire
ISO 14971, Dispositifs médicaux — Application de la gestion des risques aux dispositifs médicaux
ISO 15223-1, Dispositifs médicaux — Symboles à utiliser avec les informations à fournir par le fabricant —
Partie 1: Exigences générales
ISO 17664-1, Traitement de produits de soins de santé — Informations relatives au traitement des dispositifs
médicaux à fournir par le fabricant du dispositif — Partie 1: Dispositifs médicaux critiques et semi-critiques
ISO 17664-2, Traitement de produits de soins de santé — Informations relatives au traitement des dispositifs
médicaux à fournir par le fabricant du dispositif — Partie 2: Dispositifs médicaux non critiques
ISO/CIE 19476, Caractérisation des performances des luxmètres et des luminancemètres
ISO 21530, Art dentaire — Matériaux utilisés pour les surfaces du matériel dentaire — Détermination de la
résistance aux désinfectants chimiques
IEC 60598-1, Luminaires — Partie 1: Exigences générales et essais
IEC 60601-1, Appareils électromédicaux — Partie 1: Exigences générales pour la sécurité de base et les
performances essentielles
IEC 62366-1, Dispositifs médicaux — Partie 1: Application de l'ingénierie de l'aptitude à l'utilisation aux
dispositifs médicaux
IEC 62471, Sécurité photobiologique des lampes et des appareils utilisant des lampes
IEC 62471:2006, Sécurité photobiologique des lampes et des appareils utilisant des lampes
CIE 224, Colour Fidelity Index for accurate scientific use (disponible en anglais seulement)
CIE S 017, ILV: International Lighting Vocabulary
3 Termes et définitions
Pour les besoins du présent document, les termes et les définitions de l’ISO 1942, ISO 4073, IEC 60598-1,
IEC 60601-1, CIE S 017 ainsi que les suivants, s’appliquent.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en normalisation,
consultables aux adresses suivantes:
— IEC Electropedia: disponible à l’adresse http:// www .electropedia .org/
— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp
3.1
luminaire opératoire
dispositif destiné à éclairer la cavité buccale d’un patient, qui comprend une base fixe et un bras réglable
3.2
produit de restauration photo-activé
produit dentaire destiné à une utilisation buccale, qui intègre un système monomère dont la polymérisation
est photo initiée
4 Exigences
4.1 Exigences optiques
4.1.1 Généralités
Les exigences optiques sont spécifiées à une distance de 700 mm. Cette distance de mesure normalisée
permet de comparer les spécifications du fabricant pour différents luminaires opératoires dans les mêmes
conditions. Pour plus de clarté, la conception d’un luminaire opératoire peut être optimisée pour d’autres
distances et les propriétés optiques peuvent être consignées par le fabricant à des distances supplémentaires
à sa discrétion.
4.1.2 Niveau d’éclairement réglable
Le niveau d’éclairement doit être réglable. Le réglage de l’éclairement peut s’effectuer soit en continu, soit
selon des niveaux discrets.
Le fabricant doit fournir des spécifications correspondant aux réglages d’éclairement le plus faible et le plus
élevé pour l’éclairement maximal sur un plan perpendiculaire à l’axe optique à une distance de 700 mm du
luminaire opératoire. La spécification du fabricant pour l’éclairement au réglage le plus élevé doit être d’au
moins 15 000 lx. Les valeurs d’éclairement maximales mesurées aux réglages d’éclairement le plus bas et le
plus haut doivent être dans les limites de 20 % de leurs spécifications respectives.
Essai effectué conformément à 6.2 et 6.3.2.
Les exigences du paragraphe 4.1.2 ne s’appliquent pas aux modes de fonctionnement destinés à être utilisés
uniquement lors de la manipulation de produits de restauration photo-activés.
4.1.3 Diagramme d’éclairement
4.1.3.1 Zones et niveaux d’éclairement
Le diagramme d’éclairement doit être mesuré avec le luminaire opératoire réglée au niveau d’éclairement
maximal afin de déterminer d’une part l’éclairement maximal, E , et d’autre part les lignes
v,max
d’isoéclairement suivantes, conformément à 6.3.2: 0,90 × E , 0,75 × E , 0,50 × E , 0,10 × E and
v,max v,max v,max v,max
1 200 lx.
Une zone A est définie comme étant la zone délimitée par la ligne d’isoéclairement correspondant à 75 % de
l’éclairement maximal. La limite de la zone A doit se trouver sur ou en dehors d’une ellipse de 50 mm d’axe
horizontal et de 25 mm d’axe vertical, et dont l’axe horizontal et l’axe vertical sont respectivement alignés
sur le grand axe et le petit axe du diagramme d’éclairement (voir Figure 1). L’éclairement ne doit pas être
inférieur à 75 % de E dans toute l’ellipse. Essai effectué conformément à 6.3.2.
v,max
Une zone B est définie comme étant la zone délimitée par la ligne d’isoéclairement correspondant à 50 %
de l’éclairement maximal. La limite de la zone B doit se trouver sur ou en dehors d’une ellipse de 80 mm
d’axe horizontal et de 40 mm d’axe vertical, et ayant les mêmes axes que l’ellipse, plus petite, liée à la zone A
(voir Figure 2). Essai effectué conformément à 6.3.2.
Dimensions en millimètres
Légende
A zone éclairée A
Figure 1 — Exemple de diagramme d’éclairement satisfaisant aux exigences relatives à la zone A
Dimensions en millimètres
Légende
B zone éclairée B
Figure 2 — Exemple de diagramme d’éclairement satisfaisant aux exigences relatives à la zone B
4.1.3.2 Uniformité d’éclairement
L’éclairement doit décroître en intensité, de manière progressive et régulière, vers la périphérie du
diagramme.
Essai effectué conformément à 6.3.3.
4.1.4 Éclairement des yeux du patient
Une zone C est définie comme étant la zone délimitée par la ligne d’isoéclairement correspondant à 90 % de
l’éclairement maximal. Le niveau d’éclairement en tout point situé sur ou au-dessus d’une ligne horizontale
se trouvant à 60 mm au-dessus du point le plus proche des yeux du patient de la zone C ne doit pas être
supérieur à 1 200 lx (voir Figure 3).
Essai effectué conformément à 6.3.4.
Dimensions en millimètres
Légende
C zone éclairée C
Figure 3 — Exemple de diagramme d’éclairement satisfaisant aux exigences relatives à la limitation
de l’éclairement des yeux du patient
4.1.5 Uniformité chromatique
Aucune variation chromatique perceptible (séparation de couleur) de la lumière incidente sur l’écran de
mesure ne doit être visible ni dans la zone A, ni dans la zone B.
Essai effectué conformément à 6.3.5.
4.1.6 Chromaticité et température de couleur proximale
Sur toute la plage des niveaux d’éclairement, la température de couleur proximale doit être comprise entre
3 600 K et 6 400 K dans les zones A et B du diagramme d’éclairement. D [la distance perpendiculaire dans
uv
l’échelle chromatique uniforme CIE 1960 (u, v) entre le lieu des corps noirs et les coordonnées chromatiques
du luminaire opératoire] doit être comprise entre −0,01 et +0,01.
À titre de référence, les limites de chromaticité dans les coordonnées CIE (u, v) sont représentées à la
Figure 4.
Lorsque le luminaire opératoire est réglé sur le niveau d’éclairement maximal, il convient que la température
de couleur proximale soit, de préférence, comprise entre 4 500 K et 6 400 K.
Essai effectué conformément à 6.3.6.
Les exigences du paragraphe 4.1.6 ne s’appliquent pas aux modes de fonctionnement destinés à être utilisés
uniquement lors de la manipulation de produits de restauration photo-activés.
Légende
v coordonnées v de l’échelle chromatique uniforme CIE 1960
u coordonnées u de l’échelle chromatique uniforme CIE 1960
lieu des corps noirs
limites de chromaticité
Figure 4 — Limites de chromaticité dans les coordonnées CIE (u, v)
4.1.7 Ombres
L’ombre dure d’un disque de 20 mm de diamètre à une distance de 50 mm doit avoir un diamètre maximal ne
dépassant pas 12 mm.
Essai effectué conformément à 6.3.7.
4.1.8 Fidélité des couleurs
Pour l’éclairement général de la cavité buccale, le luminaire opératoire doit présenter un indice de fidélité
des couleurs, R , d’au moins 85.
f
NOTE L’importance de l’évaluation précise de la couleur dans le diagnostic et le traitement dentaires lors de
l’utilisation d’un luminaire opératoire justifie la spécification de R comme mesure de la fidélité des couleurs dans le
f
[4]
présent document, bien que la CIE 224 indique R n’est pas destiné à servir de remplacement universel pour l’indice
f
général de rendu des couleurs, R , à l’heure actuelle. La décision de spécifier R dans le présent document a été prise en
a f
consultation avec la CIE.
Essai effectué conformément à 6.3.8.
Les exigences du paragraphe 4.1.8 ne s’appliquent pas aux modes de fonctionnement destinés à être utilisés
uniquement lors de la manipulation de produits de restauration photo-activés.
4.1.9 Risque lié aux expositions aux rayonnements UV actiniques pour la peau et l’œil
En ce qui concerne la classification relative au risque ultraviolet actinique (E ), le luminaire opératoire doit
s
relever tout au plus du groupe de risque 1, tel que spécifié en 6.1 de l’IEC 62471:2006, lorsqu’il est soumis
à essai selon les conditions spécifiées en 6.3.9 À moins que le luminaire opératoire soit classé dans le
“groupe sans risque” pour le risque ultraviolet actinique, la durée d’exposition autorisée, t , au sens de
max
l’IEC 62471:2006, 4.3.1, doit être calculée conformément à 6.3.9.
Le respect de cette exigence doit être vérifié soit au moyen de documents (par exemple, le rapport d’essai
du fabricant de la source lumineuse) attestant qu’aucune des sources lumineuses utilisées dans le luminaire
opératoire n’émet dans la plage de longueurs d’onde concernée (200 nm à 400 nm), soit au moyen d’essais
réalisés conformément à 6.3.9.
4.1.10 Risque lié aux expositions dans le proche UV pour l’œil
En ce qui concerne la classification relative au risque dans le proche UV (E ), le luminaire opératoire doit
UVA
relever tout au plus du groupe de risque 1, tel que spécifié en 6.1 de l’IEC 62471:2006, lorsqu’il est soumis à
essai selon les conditions spécifiées en 6.3.10.
À moins que le luminaire opératoire soit classé dans le “groupe sans risque” pour le risque du proche UV,
la durée d’exposition autorisée, t , au sens de l’IEC 62471:2006, 4.3.2, doit être calculée conformément
max
à 6.3.10.
Le respect de cette exigence doit être vérifié soit au moyen de documents (par exemple, le rapport d’essai
du fabricant de la source lumineuse) attestant qu’aucune des sources lumineuses utilisées dans le luminaire
opératoire n’émet dans la plage de longueurs d’onde concernée (315 nm à 400 nm), soit au moyen d’essais
réalisés conformément à 6.3.10.
4.1.11 Risque rétinien lié aux expositions à la lumière bleue
La classification relative au risque rétinien lié à la lumière bleue (L ), au sens de l’IEC 62471:2006, 6.1, doit
B
correspondre tout au plus au groupe de risque 1 lorsqu’il est soumis à essai selon les conditions spécifiées
en 6.3.11.
À moins que le luminaire opératoire soit classé dans le “groupe sans risque” pour le risque rétinien lié aux
expositions à la lumière bleue, la durée d’exposition autorisée, t , au sens de l’IEC 62471:2006, 4.3.3, doit
max
être calculée conformément à 6.3.11.
Essai effectué conformément à 6.3.11.
4.1.12 Conditions de premier défaut pour la sécurité photobiologique
Une analyse en condition de premier défaut doit être effectuée pour les exigences relatives aux expositions
aux rayonnements UV actiniques pour la peau et l’œil (voir 4.1.9), aux expositions dans le proche UV pour
l’œil (voir 4.1.10) et au risque rétinien lié aux expositions à la lumière bleue (voir 4.1.11). Le luminaire
[5]
opératoire doit être considéré comme “sécurisé en premier défaut” (voir l’IEC 60601-1:2005, 4.7) si sa
classification en groupe de risque n’excède pas le groupe de risque 2 indiqué dans l’IEC 62471:2006, 6.1 en
condition de premier défaut.
NOTE 1 Une condition de premier défaut, telle qu’un court-circuit ou l’ouverture du circuit de tout composant, autre
qu’un composant aux caractéristiques à haute fiabilité, ou une défaillance logicielle, est susceptible d’entraîner une
élévation du courant d’excitation des diodes électroluminescentes (LED), une augmentation de l’éclairement et une
classification plus élevée dans les groupes de risques photobiologiques.
NOTE 2 L’analyse de la sécurité photobiologique en condition de premier défaut peut être réalisée sur la base de
la variation de l’éclairement en condition de premier défaut par rapport à l’éclairement en conditions normales si le
spectre d’émission en condition de premier défaut est équivalent au spectre d’émission en conditions normales.
4.1.13 Éclairement énergétique (300 nm à 2 500 nm)
L’éclairement énergétique sur la plage de longueurs d’onde comprise entre 300 nm et 2 500 nm doit
être ≤ 350 W/m au niveau d’éclairement maximal à une distance de 700 mm du luminaire opératoire.
Essai effectué conformément à 6.3.12.
4.1.14 Compatibilité avec les produits de restauration photo-activés
Si le luminaire opératoire est doté d’un programme destiné à être utilisé lors de la manipulation de produits
de restauration photo-activés, l’éclairement maximum du programme doit être d’au moins 6 500 lx et
l’éclairement énergétique pondéré de la camphorquinone doit être inférieur à 3,0 W/m si elle est soumise à
essai dans les conditions spécifiées en 6.3.13. L’éclairement énergétique pondéré du spectre d’absorbance de
la camphoroquinone correspond à l’intégrale du produit du spectre d’éclairement énergétique du luminaire
opératoire par celui du spectre d’absorption normalisé de la camphoroquinone sur la plage de longueurs
d’onde comprise entre 400 nm et 515 nm (voir 6.3.13).
NOTE Les systèmes photo-initiateurs des produits de restauration dentaire disponibles dans le commerce se
basent actuellement sur au moins une des substances suivantes: camphoroquinone, 1-phényl-1,2-propanedione ou
oxydes d’acylphosphine. Chacun de ces photo-initiateurs possède un spectre d’absorbance différent. Étant donné que
le spectre d’absorbance de la camphoroquinone s’étend sur des longueurs d’onde plus longues que les autres photo-
initiateurs, le chevauchement avec le spectre d’éclairement des luminaires opératoires est plus important en utilisant
cette substance. Par conséquent, le spectre d’absorbance de la camphoroquinone est supposé représenter le scénario
le plus défavorable pour l’évaluation des effets éventuels des luminaires opératoires dentaires sur les produits de
restauration photo-activés.
Essai effectué conformément à 6.3.13.
4.2 Exigences mécaniques
4.2.1 Dispositifs de commande
Les dispositifs de commande doivent être conçus et placés de façon à réduire au minimum le risque de mise
en marche accidentelle. Les symboles graphiques et les performances des organes de commande doivent
être conformes à l’ISO 9687.
4.2.2 Positionnement par rotation
Il convient que le luminaire opératoire puisse tourner autour des axes x, y et z, du système de coordonnées
cartésiennes afin d’offrir une flexibilité de positionnement maximale à l’opérateur, tout en évitant un
éclairement excessif des yeux du patient.
EXEMPLE 1 La rotation du luminaire opératoire autour des axes x, y et z du système de coordonnées cartésiennes
peut être obtenue par trois axes de pivotement de rotation intégrés au bras de positionnement d’un luminaire
opératoire, même si les trois axes de pivotement de rotation ne sont pas perpendiculaires l’un à l’autre.
EXEMPLE 2 La rotation du luminaire opératoire autour des axes x, y et z du système de coordonnées cartésiennes
peut être réalisée par un joint à rotule intégré au bras de positionnement d’un luminaire opératoire.
4.2.3 Stabilité après positionnement
Il convient que les luminaires opératoires soient exempts de dérive apparente lorsqu’ils sont positionnés.
4.2.4 Parties projetées
Le luminaire opératoire doit être conçu pour assurer une protection contre les effets du bris de sa source
lumineuse, s’il est possible que sa source lumineuse se brise. Cette exigence ne s’applique pas aux sources
lumineuses à LED.
Le luminaire opératoire doit être conçu de sorte que les éclats produits par le bris de la source lumineuse
ne puissent pas compromettre la sécurité. Ce point doit être vérifié par une analyse du risque appropriée,
conformément à l’ISO 14971.
4.3 Traitement
Toutes les parties extérieures du luminaire opératoire qu’il est possible de toucher lors de son utilisation et
de sa mise en place doivent être adaptées à un traitement au moyen de produits et de méthodes recommandés
par le fabricant, sans détérioration des surfaces ni des étiquetages.
Le fabricant doit fournir des informations relatives au traitement des luminaires opératoires, conformément
à l’ISO 17664-1 et à l’ISO 17664-2, le cas échéant. De préférence, il convient que les poignées soient
stérilisables ou qu’elles puissent être munies de protections réutilisables et stérilisables.
Les essais de résistance au nettoyage et à la désinfection doivent être effectués conformément à l’ISO 21530.
4.4 Exigences électriques
Les luminaires opératoires doivent pouvoir fonctionner en continu. La conformité doit être constatée en
vérifiant la documentation du fabricant.
NOTE La désignation de fonctionnement continu est pertinente pour déterminer l’applicabilité de certaines
[2] [3]
exigences électriques de l’IEC 60601-1 et de l’IEC 80601-2-60 .
4.5 Aptitude à l’utilisation
L’évaluation de l’aptitude à l’utilisation doit être effectuée selon le processus décrit dans l’IEC 62366-1.
Les essais doivent être effectués conformément à l’IEC 62366-1.
5 Échantillonnage
Tous les essais de type doivent être effectués sur un échantillon représentatif du luminaire opératoire.
6 Méthodes d’essai
6.1 Généralités
Tous les essais décrits dans le présent document sont des essais de type.
Les essais doivent être réalisés à une température ambiante de (23 ± 2) °C. L’humidité relative doit être
comprise entre 30 % et 70 %.
Toutes les mesures du rayonnement optique doivent être traçables par rapport au Système international
[6]
d’unités. Voir l’ISO/IEC 17025 , 6.5.2 pour plus d’informations.
6.2 L’examen visuel
L’inspection visuelle doit être effectuée avec une acuité visuelle normale, sans grossissement.
6.3 Essais optiques
6.3.1 Configuration d’essai
Diriger le faisceau lumineux sur un écran de mesure, perpendiculaire à l’axe optique, à une distance de
700 mm mesurée depuis la partie extérieure la plus avancée du luminaire opératoire d’où la lumière est
émise.
Pendant les essais, ajuster tous les dispositifs de commande de l’éclairement au niveau d’éclairement
maximal, sauf spécification contraire, et faire fonctionner jusqu’à stabilisation de l’éclairement énergétique
et de la couleur, tel que déterminé par contrôle de la moyenne actuelle des mesures, avant de procéder aux
mesures pour les essais spécifiés de 6.3.2 à 6.3.13, sauf spécification contraire.
Tracer un système de coordonnées rectangulaire dans le plan de mesure, l’origine des coordonnées (c’est-
à-dire le point d’intersection des axes de coordonnées) étant placée au centre de la zone d’éclairement
maximal, avec l’axe des x parallèle à l’axe principal du diagramme d’éclairement. S’il y a une coupure
d’éclairement bien marquée dans la direction des y, prendre celle-ci comme direction positive. À défaut de
coupure d’éclairement bien marquée dans la direction des y, choisir arbitrairement une direction comme
direction positive.
Pour les essais spécifiant l’évaluation visuelle du diagramme d’éclairement, placer un écran plat blanc
uniforme, neutre et à réflexion diffuse dans le plan de mesure. Pour les essais nécessitant des mesures à
l’aide d’instruments, placer le détecteur spécifié dans le plan de mesure, sauf spécification contraire.
Réaliser les essais optiques dans une pièce où tant la lumière provenant d’autres sources que la lumière
réfléchie par les surfaces sont négligeables.
Si le luminaire opératoire est conçu pour être utilisé à une distance cible autre que 700 mm, les essais
doivent également être réalisés à la distance de fonctionnement prévue.
6.3.2 Niveau d’éclairement et diagramme d’éclairement
Utiliser la configuration d’essai décrite en 6.3.1 avec le luminaire opératoire réglé au niveau d’éclairement
maximal.
Mesurer les niveaux d’éclairement à l’aide d’un photomètre étalonné conformément à l’ISO/CIE 19476 et
possédant une cellule active de 10 mm de diamètre.
En déplaçant le photomètre dans le plan de mesure, effectuer les mesures selon des coordonnées rectilignes
espacées de 5 mm maximum, de façon à inclure tous les points du diagramme d’éclairement dont l’éclairement
est supérieur à 600 lx.
Un photomètre capable d’enregistrer indirectement la répartition de l’éclairement lors de la mesure, [c’est-
à-dire un dispositif de mesurage de luminance par imagerie (ILMD)], peut être utilisé à cette fin. Dans ce
cas, le diagramme d’éclairement est généralement projeté sur un écran plat, uniforme et à réflexion diffuse
positionné dans le plan de mesurage et la distribution de la luminance de la lumière réfléchie est mesurée
à l’aide de l’ILMD. L’uniformité et la réponse directionnelle des caractéristiques de réflectance de l’écran
doivent être évaluées et corrigées ou prises en compte dans les incertitudes de mesure.
Enregistrer les mesures et leurs coordonnées. Déterminer l’éclairement maximal, E . Utiliser
v,max
l’interpolation linéaire des mesures pour calculer et tracer les lignes d’isoéclairement suivantes, spécifiées
en 4.1.3.1: 0,90 × E , 0,75 × E , 0,50 × E , 0,10 × E et 1 200 lx. Vérifier si les exigences
v,max v,max v,max v,max
correspondant au réglage d’éclairement le plus élevé de 4.1.2 et 4.1.3.1 sont satisfaites.
Répéter les mesurages avec le luminaire opératoire réglé au niveau d’éclairement minimal. Vérifier si
l’exigence correspondant au réglage d’éclairement le plus faible indiqué dans le 4.1.2 est satisfaite (4.1.3.1
n’est pas applicable avec ce réglage).
6.3.3 Uniformité d’éclairement
Utiliser la configuration d’essai décrite en 6.3.1.
L’exigence spécifiée en 4.1.3.2 est respectée si aucun anneau brillant ni aucune tache
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