Photobiological safety of lamps and lamp systems - Part 5: Image projectors

IEC 62471-5:2015 provides a risk group classification system for image projectors, and measurement conditions for optical radiation emitted by image projectors. It includes manufacturing requirements that may be required as a result of an image projector system being assigned to a particular risk group. Therefore, this part of IEC 62471 provides safety requirements for lamp systems that are intended to produce projected visible optical radiation, such as theatre projectors, data projectors and home-use projectors. The assigned risk group of a projector product also may be used by projector manufacturers to assist with any risk assessments, e.g. for occupational exposure in workplaces. National requirements may exist for the assessment of products or occupational exposure.

Sécurité photobiologique des lampes et des appareils utilisant des lampes - Partie 5: Projecteurs d’images

IEC 62471-5:2015 fournit des exigences concernant la sécurité photobiologique du rayonnement optique émis par les projecteurs d'images. Elle inclut les exigences de fabrication qui peuvent être exigées par suite de l'affectation d'un groupe de risques particulier à un appareil utilisant un projecteur d'images. Par conséquent, la présente partie de l’IEC 62471 fournit des exigences de sécurité pour les appareils utilisant des lampes qui sont destinés à générer des rayonnements optiques visibles projetés, tels que les projecteurs cinématographiques, les projecteurs d'image-écran et les projecteurs à usage domestique. Le groupe de risques affecté d'un projecteur peut également être utilisé par les fabricants de projecteurs pour faciliter les appréciations du risque, par exemple dans le cas de l'exposition professionnelle sur les lieux de travail. Il peut exister des exigences nationales pour l'évaluation des appareils ou de l'exposition professionnelle.

General Information

Status
Published
Publication Date
08-Jun-2015
Current Stage
PPUB - Publication issued
Start Date
09-Jun-2015
Completion Date
09-Jun-2015
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IEC 62471-5
Edition 1.0 2015-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Photobiological safety of lamps and lamp systems –
Part 5: Image projectors
Sécurité photobiologique des lampes et des appareils utilisant des lampes –
Partie 5: Projecteurs d’images
IEC 62471-5:2015-06(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62471-5
Edition 1.0 2015-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Photobiological safety of lamps and lamp systems –
Part 5: Image projectors
Sécurité photobiologique des lampes et des appareils utilisant des lampes –
Partie 5: Projecteurs d’images
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.01; 31.260 ISBN 978-2-8322-5353-3

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62471-5:2015 © IEC 2015
CONTENTS

FOREWORD ........................................................................................................................... 5

INTRODUCTION ..................................................................................................................... 7

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms and definitions ...................................................................................................... 9

4 General ......................................................................................................................... 15

4.1 Basis for risk groups ............................................................................................. 15

4.2 Example applications ............................................................................................ 15

4.2.1 RG0 / RG1 projectors .................................................................................... 15

4.2.2 RG2 projectors .............................................................................................. 15

4.2.3 RG3 projectors .............................................................................................. 15

4.3 Projector lamps ..................................................................................................... 15

4.4 Assessment criteria (background) ......................................................................... 16

5 Risk group determination ............................................................................................... 16

5.1 Test conditions ..................................................................................................... 16

5.2 Measurement conditions for image projectors ....................................................... 17

5.2.1 Measurement throw ratio ............................................................................... 17

5.2.2 Measurement distance ................................................................................... 17

5.3 The position and size of apparent source, the calculation of angular

subtense ............................................................................................................... 17

5.4 Measurement of irradiance – specified apertures .................................................. 18

5.5 Measurement of radiance ...................................................................................... 18

5.6 Accessible emission limits..................................................................................... 19

5.6.1 For CW emission ........................................................................................... 19

5.6.2 For pulsed emission....................................................................................... 20

5.6.3 Spectral weighting functions .......................................................................... 21

5.7 Applying information from the lamp manufacturers ................................................ 23

5.7.1 General ......................................................................................................... 23

5.7.2 Limits provided in irradiance/radiant exposure ............................................... 23

5.7.3 Limits provided in radiance or radiance dose ................................................. 23

6 Manufacturer’s requirements ......................................................................................... 23

6.1 General ................................................................................................................. 23

6.2 Determination of HD (hazard distance) ................................................................. 24

6.3 Safety feature "soft start" ...................................................................................... 24

6.4 Optional safety features ........................................................................................ 24

6.4.1 Projection of warning message ...................................................................... 24

6.4.2 Power reduction by sensor system ................................................................. 24

6.5 Labelling on products ............................................................................................ 24

6.5.1 General ......................................................................................................... 24

6.5.2 RG0 projector ................................................................................................ 25

6.5.3 RG1 projector ................................................................................................ 25

6.5.4 RG2 projector ................................................................................................ 26

6.5.5 RG3 projector ................................................................................................ 27

6.6 User information ................................................................................................... 27

6.6.1 General ......................................................................................................... 27

6.6.2 Assessment of user accessible area .............................................................. 28

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IEC 62471-5:2015 © IEC 2015 – 3 –

6.6.3 User information (user manual) ...................................................................... 28

6.6.4 User information for maintenance .................................................................. 29

6.7 Labelling and user information for image projectors where the risk group will

be changed by interchangeable lens ..................................................................... 29

6.7.1 General ......................................................................................................... 29

6.7.2 Labelling on the projector .............................................................................. 30

6.7.3 Mark on the interchangeable lens .................................................................. 31

6.7.4 The user information in the user manual of the projector ................................ 31

6.7.5 The user information in the user manual of the interchangeable lens ............. 32

7 Information for service ................................................................................................... 32

Annex A (normative) Test scheme for lamp types ................................................................ 33

Annex B (informative) Example of calculations ..................................................................... 34

B.1 Radiance calculations ........................................................................................... 34

B.1.1 General ......................................................................................................... 34

B.1.2 Calculation from measured irradiance ............................................................ 34

B.1.3 Calculation from luminous output ................................................................... 35

B.2 Calculation example of risk group (CW) ................................................................ 36

B.2.1 Example of a 5 000 lm projector .................................................................... 36

B.2.2 10 000 lm professional-use projector with an apparent source of small

subtense angle (CW) ..................................................................................... 38

B.2.3 2 000 lm projector with small apparent source (CW) ...................................... 39

B.3 Calculation example of risk group (pulsed emission) ............................................. 40

B.3.1 General ......................................................................................................... 40

B.3.2 14 000 lm projector with one peak ................................................................. 40

B.3.3 14 000 lm projector with two peaks ................................................................ 43

Annex C (informative) Example of intra-beam of projector sources with millimetre

scale ..................................................................................................................................... 46

Annex D (informative) Measurement distance ...................................................................... 47

Annex E (informative) Hazard distance as a function of modifying optics ............................. 49

Bibliography .......................................................................................................................... 50

Figure 1 – Exit pupil in projector ........................................................................................... 10

Figure 2 – Examples of the application of the definition of pulse duration .............................. 12

Figure 3 – Definition of throw ratio ........................................................................................ 14

Figure 4 – Diameter of the apparent source .......................................................................... 17

Figure 5 – RG1 label (optional) ............................................................................................. 25

Figure 6 – RG2 label ............................................................................................................. 26

Figure 7 – RG2 caution symbol ............................................................................................. 26

Figure 8 – Sample design of RG2 caution pictogram ............................................................. 26

Figure 9 – RG3 label ............................................................................................................. 27

Figure 10 – Optical radiation warning symbol ........................................................................ 27

Figure 11 – "Not for household use" symbol .......................................................................... 27

Figure 12 – RG2 label with the caution for RG3 .................................................................... 30

Figure 13 – RG2 caution label with the caution for RG3 ........................................................ 30

Figure 14 – RG2 pictogram with the caution for RG3 ............................................................ 31

Figure B.1 – Image of the apparent source and measurement condition ................................ 36

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– 4 – IEC 62471-5:2015 © IEC 2015

Figure B.2 – Picture of the apparent source of a projector at the exit pupil of the

projection lenses with a scale ............................................................................................... 36

Figure B.3 – Example with one peak of pulsed emission ....................................................... 41

Figure B.4 – Example with two peaks of pulsed emission ...................................................... 43

Figure C.1 – Examples of intra-beam images of projector sources with millimetre scale ........ 46

Figure E.1 – Hazard distance as a function of modifying optics (example) ............................ 49

Table 1 – Measurement criteria — field of view (angles of acceptance) for CW source ......... 19

Table 2 – Measurement criteria — field of view (angles of acceptance) for pulsed

source .................................................................................................................................. 19

Table 3 – AEL (accessible emission limits) for risk groups of lamps and lamp systems

emitting CW optical radiation ................................................................................................ 19

Table 4 – Time base values associated with the risk groups and hazards ............................. 20

Table 5 – Basic retinal thermal emission limit........................................................................ 20

Table 6 – The values of C and α for AEL calculation ........................................................... 21

Table 7 – Pulse duration dependent values of α ............................................................. 21

max

Table 8 – Spectral weighting functions B(λ) and R(λ) for assessing retinal hazards .............. 22

Table 9 – Labelling on products ............................................................................................ 25

Table 10 – User information in user manual .......................................................................... 28

Table A.1 –Required evaluations .......................................................................................... 33

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IEC 62471-5:2015 © IEC 2015 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
PHOTOBIOLOGICAL SAFETY OF LAMPS AND LAMP SYSTEMS –
Part 5: Image projectors
FOREWORD

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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62471-5 has been prepared by IEC technical committee 76:

Optical radiation safety and laser equipment.

This bilingual version (2018-02) corresponds to the monolingual English version, published in

2015-06.
The text of this standard is based on the following documents:
FDIS Report on voting
76/519/FDIS 76/521/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.
The French version of this standard has not been voted upon.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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– 6 – IEC 62471-5:2015 © IEC 2015

The committee has decided that the contents of this publication will remain unchanged until

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related to the specific publication. At this date, the publication will be
• reconfirmed,
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IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

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colour printer.
---------------------- Page: 8 ----------------------
IEC 62471-5:2015 © IEC 2015 – 7 –
INTRODUCTION

Most lamps and lamp systems are safe and do not pose photobiological risks except under

unusual exposure conditions. This also is the case for optical image projectors where

experience shows that even high power cinema projectors may be safe for accidental

momentary viewing and can only under some conditions pose optical hazards at close

distances or for intentional 'long-duration' staring into the source. The rapid development of

solid-state and other lamps or lamp systems has permitted new projector products, and

generated the need for a photobiological safety standard for this group of lamp systems.

Optical radiation hazards from all types of lamps and lamp systems are currently assessed by

the application of IEC 62471:2006 (CIE S 009:2002), Photobiological safety of lamps and

lamp systems. IEC 62471 covers LEDs, incandescent, low- and high-pressure gas-discharge,

arc and other lamps. Following the concept of vertical standards, the risk group classification

system in IEC 62471 for lamps is to be adapted for specific product groups such as image

projectors.

This part of IEC 62471 provides a risk group classification system for image projectors, and

measurement conditions for optical radiation emitted by image projectors. It includes

manufacturing requirements that may be required as a result of an image projector system

being assigned to a particular risk group. Therefore, this part of IEC 62471 provides safety

requirements for lamp systems that are intended to produce projected visible optical radiation,

such as theatre projectors, data projectors and home-use projectors. The assigned risk group

of a projector product also may be used by projector manufacturers to assist with any risk

assessments, e.g. for occupational exposure in workplaces. National requirements may exist

for the assessment of products or occupational exposure.

The emission limits provided in this part of IEC 62471 are derived from the exposure limits

specified by ICNIRP in their 2013 Guidelines for incoherent visible and infrared radiation [1] .

These exposure limits are also the basis for the emission limits to be specified in the future

International Standard IEC 62471-1 .
______________
Numbers in square brackets refer to the Bibliography.
Revision of IEC 62471:2006.
---------------------- Page: 9 ----------------------
– 8 – IEC 62471-5:2015 © IEC 2015
PHOTOBIOLOGICAL SAFETY OF LAMPS AND LAMP SYSTEMS –
Part 5: Image projectors
1 Scope

This part of IEC 62471 provides requirements regarding photobiological safety of the optical

radiation emitted by image projectors. This part of IEC 62471 does not deal with other

hazards such as electrical, mechanical or fire hazards.
This part of IEC 62471 provides requirements regarding:
• optical radiation safety assessment of image projectors;
• projector risk groups;
• testing conditions and measurement conditions;
• manufacturer’s requirements including user information.

The scope of this part of IEC 62471 is photobiological safety of image projectors including the

emissions from laser-illuminated projectors that fulfill the requirements as specified in

IEC 60825-1:2014, 4.4 and for which visible light emission has been excluded from

classification in IEC 60825-1.

This part of IEC 62471 does not address safety requirements for laser display products where

collimated laser beams — generally scanned — are employed. It does address those laser-

illuminated projectors that employ a laser source to illuminate, for example, a micro-electro-

mechanical system (MEMS) without scanned beams or crystal-based display projector system.

NOTE Image projectors containing lasers are subject to those provisions of IEC 60825-1 applicable to the

embedded laser. See IEC 60825-1:2014, 4.4 for which visible light emission has been excluded from the laser

product classification.

This part of IEC 62471 includes projectors for only visible image projection and does not

include ultraviolet (UV) projectors, infrared (IR) projectors, general lighting service (GLS)

lamps (GLS; defined in IEC 62471) or projector lamp systems used for general lighting, which

are treated in separate International Standards.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 62471, Photobiological safety of lamps and lamp systems

IEC 60825-1:2014, Safety of laser products – Part 1: Equipment classification and

requirements
IEC 60050 (all parts), International Electrotechnical Vocabulary (available at
http://www.electropedia.org)

IEC 60950-1, Information technology equipment – Safety – Part 1: General requirements

IEC 60065, Audio, video and similar electronic apparatus – Safety requirements
---------------------- Page: 10 ----------------------
IEC 62471-5:2015 © IEC 2015 – 9 –
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62471,
IEC 60050-845 [2] and the following apply.
3.1
accessible emission
level of radiation determined at a certai
...

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