IEC TR 60825-3:2022

IEC TR 60825-3 ®
Edition 3.0 2022-07
TECHNICAL
REPORT
colour
inside
Safety of laser products –
Part 3: Guidance for laser displays and shows
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IEC TR 60825-3 ®
Edition 3.0 2022-07
TECHNICAL
REPORT
colour
inside
Safety of laser products –
Part 3: Guidance for laser displays and shows

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.260 ISBN 978-2-8322-3925-4

– 2 – IEC TR 60825-3:2022 © IEC 2022
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 Exposure hazards and biological effects . 15
4.1 Laser projector classification and hazards. 15
4.2 Biological effects on the eye . 15
4.3 Biological effects on skin . 16
5 Zone limits and maximum permissible exposures (MPE) for laser effects . 16
5.1 Compliance with maximum permissible exposure (MPE) . 16
5.2 Spectator zone MPE . 17
5.3 Performer zone (controlled location) MPE . 17
5.4 At-risk ancillary personnel MPE . 17
6 Safety criteria for equipment and installations . 18
7 Responsibilities of designers, installers, operators and performers . 22
7.1 Training . 22
7.2 Planning by designers, installers and operators . 22
7.3 Set-up and alignment . 24
7.4 Operation . 25
7.5 Display safety record (DSR) . 26
7.6 Contingency planning. 27
7.6.1 General . 27
7.6.2 Dealing with an actual eye injury . 27
7.6.3 Dealing with an actual skin injury . 27
7.6.4 Dealing with a suspected eye injury . 27
7.7 Incident reporting and accident investigation . 27
8 Laser display risk management . 28
8.1 Laser effect exposure risk . 28
8.2 Laser display risk factors and controls . 28
9 Exposure assessment . 30
9.1 Recommendation . 30
9.2 Guidance . 30
9.3 Difficulties . 30
9.4 Evaluation considerations . 32
9.5 Measurement considerations . 32
9.6 Scan-fail safeguard . 33
10 Special considerations . 35
10.1 Holographic displays . 35
10.2 Ultraviolet and blue-light laser beams . 36
Bibliography . 37

Figure 1 – Human eye . 16
Figure 2 – Audience/spectator separation auditorium scenario with operator in control . 19
Figure 3 – Audience/spectator separation nightclub scenario with operator in control . 20

Figure 4 – Audience/spectator separation near a balcony with operator in control . 21
Figure 5 – Audience/spectator separation from unattended beams. 22
Figure 6 – Laser hazard warning signage . 29
Figure 7 – Effective pulse duration . 31
Figure 8 – Apparent pulse train at the measurement device highlighting the differences
between measurement results for average power as measured by a standard power
meter and peak power as measured by a specialized meter . 31
Figure 9 – Time for a scan-fail safeguard to be effective after having been triggered . 34

Table 1 – Summary of MPE selection criteria . 18
Table 2 – Laser effect category . 28
Table 3 – Ocular MPE and equivalent power through a 7 mm diameter aperture . 35

– 4 – IEC TR 60825-3:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF LASER PRODUCTS –
Part 3: Guidance for laser displays and shows

FOREWORD
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IEC TR 60825-3 has been prepared by IEC technical committee 76: Optical radiation safety and
laser equipment. It is a Technical Report.
This third edition cancels and replaces the second edition published in 2008. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) updates and provides additional terms and definitions relating to laser displays and shows;
b) adds information on exposure hazards and biological effects;
c) updates and provides additional safety criteria from a technical perspective of equipment
and installations;
d) updates and provides additional safety management guidance for designers, installers,
operators and performers;
e) adds guidance on identifying and managing laser display risk, including laser effect
exposure risk categories to aid management;

f) adds guidance on the management of incidents and accidents;
g) adds guidance on exposure assessment, highlighting evaluation and measurement
difficulties, and providing guidance on undertaking measurements.
The text of this Technical Report is based on the following documents:
Draft Report on voting
76/662/DTR 76/692/RVDTR
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Report is English.
A list of all parts in the IEC 60825 series, published under the general title Safety of laser
products, can be found on the IEC webs
...