IEC TR 62471-2:2009

IEC/TR 62471-2 ®
Edition 1.0 2009-08
TECHNICAL
REPORT
colour
inside
Photobiological safety of lamps and lamp systems –
Part 2: Guidance on manufacturing requirements relating to non-laser optical
radiation safety
IEC/TR 62471-2:2009(E)
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IEC/TR 62471-2 ®
Edition 1.0 2009-08
TECHNICAL
REPORT
colour
inside
Photobiological safety of lamps and lamp systems –
Part 2: Guidance on manufacturing requirements relating to non-laser optical
radiation safety
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
X
ICS 29.140 ISBN 978-2-88910-736-0
– 2 – 62471-2/TR © IEC:2009(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Terms and definitions .7
4 Risk groups applied for optical radiation safety assessments.10
4.1 Basis for optical radiation safety classification.10
4.2 Assessment criteria .10
4.3 Application-related issues .10
4.3.1 Near-infrared sources.10
4.3.2 “Point sources” .11
4.3.3 Application-related vertical standards .11
5 Guidelines for lamp and lamp system manufacturers on how to apply IEC 62471 .11
5.1 Limit values.11
5.1.1 General .11
5.1.2 Limits provided in irradiance/radiant exposure .12
5.1.3 Limits provided in (time integrated) radiance .12
5.2 Guidelines for lamp/LED manufacturers .12
5.2.1 General .12
5.2.2 Measurement conditions.12
5.2.3 User information .13
5.3 Guidelines for lamp system/luminaire manufacturers .13
5.3.1 General .13
5.3.2 Sources for general lighting service (GLS).13
5.3.3 Multi-purpose lamps .14
5.3.4 Determination of the hazard distance.14
5.4 Labelling .15
5.5 Other information provisions.16
6 Allocation of safety measures .17
6.1 General .17
6.2 Maximum acceptable viewer-related risk .18
Annex A (informative) Radiance and ocular hazards from extended sources.20
Annex B (informative) Determination of hazard distances .26
Annex C (informative) Sources for general lighting service (GLS) .36
Annex D (informative) Lamps and lamp systems with integrated, attached beam-
shaping or projection optics.41
Bibliography.45

Figure 1 – Example of graphic presentation of distant dependent emission hazard
values.15
Figure 2 – Example of warning label for a lamp with multiple hazard spectral regions .17
Figure A.1 – Invariance of radiance with distance from an extended source.21
Figure A.2 – Usual measurement conditions for the determination of radiance and time
integrated radiance .

62471-2/TR © IEC:2009(E) – 3 –
Figure A.3a – Source size larger than the FOV (overfilled).23
Figure A.3b – Source size smaller than the FOV (under-filled) .23
Figure A.3 – Source sizes.23
Figure A.4 – B(λ)-weighted radiance distribution of a state-of-the-art “pc-white” LED
component.24
Figure B.1 – Normalized correlation between radiance L and corresponding irradiance
E for varying values of source diameter and distance .27
Figure B.2 – Direct intra-beam viewing of an arc searchlight showing a magnification of
the actual arc.29
Figure B.3 – Calculated flash distance of LEDs depending on the individual half
intensity angle θ of the spatial emission.30
Figure B.4 – Actinic UV-related safe use conditions for the example radiator .32
Figure B.5 – Distance-dependant (spectrally weighted) Exempt Risk Group limits for
the spatially averaged radiance of a halogen lamp of 7 mm source size.34
Figure C.1 – Measured spatially averaged radiance.37
Figure C.2 – Relationships between illuminance of 500 lux and source luminance
[cd/m ] (indicated) for several source sizes and distances of some typical luminances.38
Figure D.1 – Ultraviolet and infrared filtering by projection optics.41
Figure D.2 – Magnified apparent source size of the filament in an incandescent
projection lamp .42
Figure D.3 – Examples of projection optics .42
Figure D.4 – Formation of a virtual LED chip image by the integrated lens.43
Figure D.5 – Imaging of the apparent source and measurement condition for the
assessment of sources with built-in or attached projection optics.43

Table 1 – Hazard-related risk group labelling of lamp systems.16
Table 2 – Explanation of labelling information and guidance on control measures.17
Table 3 – Maximum acceptable risk group of products assessed for viewer-related risk
under application specific conditions.19
Table B.1 – Spatially averaged radiance .35
Table C.1 – Risk group-related inverse square law and hazard distances .37
Table C.2 – Risk group-related hazard distances (in m) for halogen lamp of 7 mm
7 -2
source diameter and with luminance of 3 × 10 cd⋅m .39

– 4 – 62471-2/TR © IEC:2009(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PHOTOBIOLOGICAL SAFETY OF LAMPS AND LAMP SYSTEMS –

Part 2: Guidance on manufacturing requirements
relating to non-laser optical radiation safety

FOREWORD
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