IEC 60825-4:2006+AMD1:2008+AMD2:2011 CSV

IEC 60825-4 ®
Edition 2.2 2011-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Safety of laser products –
Part 4: Laser guards
Sécurité des appareils à laser –
Partie 4: Protecteurs pour lasers
IEC 60825-4:2006+A1:2008+A2:2011

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IEC 60825-4 ®
Edition 2.2 2011-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Safety of laser products –
Part 4: Laser guards
Sécurité des appareils à laser –
Partie 4: Protecteurs pour lasers

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX CS
ICS 31.260 ISBN 978-2-88912-515-9

– 2 – 60825-4  IEC:2006+A1:2008+A2:2011
CONTENTS
FOREWORD . 4
INTRODUCTION . 6

1 Scope . 7
2 Normative references. 7
3 Definitions . 7
4 Laser processing machines . 9
4.1 Design requirements . 9
4.2 Performance requirements . 10
4.3 Validation . 10
4.4 User information . 11
5 Proprietary laser guards . 11
5.1 Design requirements . 11
5.2 Performance requirements . 11
5.3 Specification requirements . 11
5.4 Test requirements. 12
5.5 Labelling requirements. 12
5.6 User information . 13

Annex A (informative) General guidance on the design and selection of laser guards . 14
Annex B (informative) Assessment of foreseeable exposure limit (FEL) . 16
Annex C (informative) Elaboration of defined terms . 23
Annex D (normative) Proprietary laser guard testing . 25
Annex E (informative) Guidelines on the arrangement and installation of laser guards . 30
Annex F (informative) Guideline for assessing the suitability of laser guards . 40
Annex G (normative)  Beam delivery systems . 67

Bibliography . 76

Figure B.1 – Calculation of diffuse reflections . 17
Figure B.2 – Calculation of specular reflections . 17
Figure B.3 – Some examples of a foreseeable fault condition . 18
Figure B.4 – Four examples of errant laser beams that might have to be contained by a
temporary guard under service conditions. 19
Figure B.5 – Illustration of laser guard exposure during repetitive machine operation . 20
Figure B.6 – Two examples of assessed duration of exposure . 21
Figure B.7 – Assessed duration of exposure for a machine with no safety monitoring . 22
Figure C.1 – Illustration of guarding around a laser processing machine . 23
Figure C.2 – Illustration of active laser guard parameters . 24
Figure D.1 – Simplified diagram of the test arrangement . 27
Figure D.2 – Simplified diagram of the ventilation for the guard under test . 27

60825-4  IEC:2006+A1:2008+A2:2011 – 3 –
Figure F.1 – Damage resistance of 1 mm thick zinc coated steel sheet derived from
10 s exposure to a defocused beam during experiments using a CW CO laser . 56
Figure F.2 – Damage resistance of 1 mm thick zinc coated steel sheet derived from
100 s exposure to a defocused beam during experiments using a CW CO laser . 56
Figure F.3 – Damage resistance of 2 mm thick zinc coated steel sheet derived from 10
s exposure to a defocused beam during experiments using a CW CO laser . 57
Figure F.4 – Damage resistance of 2 mm thick zinc coated steel sheet derived from
100 s exposure to a defocused beam during experiments using a CW CO laser . 57
Figure F.5 – Damage resistance of 3 mm thick zinc coated steel sheet derived from 10
s exposure to a defocused beam during experiments using a CW CO laser . 58
Figure F.6 – Damage resistance of 3 mm thick zinc coated steel sheet derived from
100 s exposure to a defocused beam during experiments using a CW CO laser . 58
Figure F.7 – Damage resistance of 2 mm thick aluminium sheet derived from 10 s
exposure to a defocused beam during experiments using a CW CO laser . 59
Figure F.8 – Damage resistance of 2 mm thick aluminium sheet derived from 100 s
exposure to a defocused beam during experiments using a CW CO laser . 59
Figure F.9 – Damage resistance of 1 mm thick stainless steel sheet derived from 10 s
exposure to a defocused beam during experiments using a CW CO laser . 60
Figure F.10 – Damage resistance of 1 mm thick stainless steel sheet derived from 100
s exposure to a defocused beam during experiments using a CW CO laser . 60
Figure F.11 – Damage resistance of 6 mm thick polycarbonate sheet derived from 10 s
exposure to a defocused beam during experiments using a CW CO laser . 61
Figure F.12 – Damage resistance of 6 mm thick polycarbonate sheet derived from 100
s exposure to a defocused beam during experiments using a CW CO laser . 61
Figure F.13 – Damage resistance of 1 mm thick zinc coated steel sheet derived from
10 s exposure to a defocused beam during experiments using a CW Nd:YAG laser . 62
Figure F.14 – Damage resistance of 1 mm thick zinc coated steel sheet derived from
100 s exposure to a defocused beam during experiments using a CW Nd:YAG laser . 62
Figure F.15 – Damage resistance of 2 mm thick zinc coated steel sheet derived from
10 s exposure to a defocused beam during experiments using a CW Nd:YAG laser . 63
Figure F.16 – Damage resistance of 2 mm thick zinc coated steel sheet derived from
100 s exposure to a defocused beam during experiments using a CW Nd:YAG laser . 63
Figure F.17 – Damage resistance of 3 mm thick zinc coated steel sheet derived from
10 s exposure to a defocused beam during experiments using a CW Nd:YAG laser . 64
Figure F.18 – Damage resistance of 3 mm thick zinc coated steel sheet derived from
100 s exposure to a defocused beam during experiments using a CW Nd:YAG laser . 64
Figure F.19 – Damage resistance of 2 mm thick aluminium sheet derived from 10 s
exposure to a defocused beam during experiments using a CW Nd:YAG laser . 65
Figure F.20 – Damage resistance of 2 mm thick aluminium sheet derived from 100 s
exposure to a defocused beam during experiments using a CW Nd:YAG laser . 65
Figure F.21 – Damage resistance of 1 mm thick stainless steel sheet derived from 10 s
exposure to a defocused beam during experiments using a CW Nd:YAG laser . 66
Figure F.22 – Damage resistance of 1 mm thick stainless steel sheet derived from
100 s exposure to a defocused beam during experiments using a CW Nd:YAG laser . 66

Table D.1 – Laser guard test classification . 28
Table F.1 – Application of ALARP . 43
Table G.1 – Beam delivery systems using free space beam delivery systems . 72
Table G.2 – Beam delivery systems using fibre optic cables . 74

– 4 – 60825-4  IEC:2006+A1:2008+A2:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
SAFETY OF LASER PRODUCTS –
Part 4: Laser guards
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all q
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