1、BRITISH STANDARD BS EN 60825-4:2006Safety of laser products Part 4: Laser guardsICS 13.280; 31.260g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58+A
2、2:2011National forewordThis British Standard is the UK implementation of EN 60825-4:2006+A2:2011. It is identical with IEC 60825-4:2006, incorporating amendments 1:2008 and 2:2011. It supersedes BS EN 60825-4:2006+A1:2008 which is withdrawn.The start and finish of text introduced or altered by amend
3、ment is indicated in the text by tags. Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated in the text by !“.The UK participation in its preparation was entrusted to Technical Committee EPL/76, Optical radiation safety
4、and laser equipment.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot c
5、onfer immunity from legal obligations.BS EN 60825-4:2006+A2:2011This British Standard waspublished under the authorityof the Standards Policy andStrategy Committeeon 30 November 2006 BSI 2011Amendments/corrigenda issued since publicationDate Comments 31 May 2010 Implementation of IEC amendment 1:200
6、8 with CENELEC endorsement A1:200831 July 2011 Implementation of IEC amendment 2:2011 with CENELEC endorsement A2:2011ISBN 978 0 580 67294 1EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechniqu
7、e Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60825-4:2006 E ICS 31.260 English version Safety of laser products
8、Part 4: Laser guards (IEC 60825-4:2006) Scurit des appareils laser Partie 4: Protecteurs pour lasers (CEI 60825-4:2006) Sicherheit von Lasereinrichtungen Teil 4: Laserschutzwnde (IEC 60825-4:2006) This European Standard was approved by CENELEC on 2006-10-01. CENELEC members are bound to comply with
9、the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat
10、 or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the off
11、icial versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania
12、 Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. May 2011EN 60825-4:2006+A2 Foreword The text of document 76/342/FDIS, future edition 2 of IEC 60825-4, prepared by IEC TC 76, Optical radiation safety and laser equipment, was submitted to the IEC-CENELEC parallel vote and was
13、approved by CENELEC as EN 60825-4 on 2006-10-01. This European Standard supersedes EN 60825-4:1997 + A1:2002 + A2:2003. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2007-07
14、01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-10-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60825-4:2006 was approved by CENELEC as a European Standard without any modification. _ Fo
15、reword to amendment A1 The text of document 76/383/FDIS, future amendment 1 to IEC 60825-4:2006, prepared by IEC TC 76, Optical radiation safety and laser equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 60825-4:2006 on 2008-09-01. The follo
16、wing dates were fixed: latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-06-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2011-09-01 Annex
17、 ZA has been added by CENELEC. _ Endorsement notice The text of amendment 1:2008 to the International Standard IEC 60825-4:2006 was approved by CENELEC as an amendment to the European Standard without any modification. _ BS EN 60825-4:2006+A2:2011EN 60825-4:2006+A2:2011 (E) 2 Foreword to amendment A
18、2The text of document 76/428/CDV, future amendment 2 to IEC 60825-4:2006, prepared by IEC TC 76, Optical radiation safety and laser equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A2 to EN 60825-4:2006 on 2011-05-03. Attention is drawn to the possib
19、ility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the amendment has to be implemented at national level by publication
20、 of an identical national standard or by endorsement (dop) 2012-02-03 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2014-05-03 _ Endorsement notice The text of amendment 2:2011 to the International Standard IEC 60825-4:2006 was approved by CENE
21、LEC as an amendment to the European Standard without any modification. _ BS EN 60825-4:2006+A2:2011EN 60825-4:2006+A2:2011 (E) 3 CONTENTS INTRODUCTION 78 1 Scope.8 2 Normative references8 3 Definitions10 4 Laser processing machines.10 4.1 Design requirements.11 4.2 Performance requirements11 4.3 Val
22、idation12 4.4 User information.12 5 Proprietary laser guards.12 5.1 Design requirements.12 5.2 Performance requirements12 5.3 Specification requirements.13 5.4 Test requirements13 5.5 Labelling requirements5.6 User information14.15 Annex A (informative) General guidance on the design and selection o
23、f laser guards17 Annex B (informative) Assessment of foreseeable exposure limit (FEL)24 Annex C (informative) Elaboration of defined terms26 Annex D (normative) Proprietary laser guard testing.31 Annex E (informative) Guidelines on the arrangement and installation of laser guardsAnnex F (informative
24、) Guideline for assessing the suitability of laser guards 41Bibliography .79 .18 Figure B.1 Calculation of diffuse reflections.18 Figure B.2 Calculation of specular reflections19 Figure B.3 Some examples of a foreseeable fault conditionFigure B.4 Four examples of errant laser beams that might have t
25、o be contained by a temporary guard under service conditions20 .21 Figure B.5 Illustration of laser guard exposure during repetitive machine operation.22 Figure B.6 Two examples of assessed duration of exposure23 Figure B.7 Assessed duration of exposure for a machine with no safety monitoring24 Figu
26、re C.1 Illustration of guarding around a laser processing machine25 Figure C.2 Illustration of active laser guard parameters.27 Figure D.1 Simplified diagram of the test arrangementAnnex ZA (normative) Normative references to international publications with their corresponding European publications.
27、 Annex (informative) G Beam delivery systems .7080BS EN 60825-4:2006+A2:2011EN 60825-4:2006+A2:2011 (E) 4 Figure D.2 Simplified diagram of the ventilation for the guard under test. 28Figure F.1 Damage resistance of 1 mm thick zinc coated steel sheet derived from 10 s exposure to a defocused beam dur
28、ing experiments using a CW CO laser.592Figure 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 .59 2Figure F.3 Damage resistance of 2 mm thick zinc coated steel sheet derived from 10 s exposure to a def
29、ocused beam during experiments using a CW CO laser .60 2Figure 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 .60 2Figure F.5 Damage resistance of 3 mm thick zinc coated steel sheet derived from 10 s
30、exposure to a defocused beam during experiments using a CW CO laser .61 2Figure 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 .61 2Figure F.7 Damage resistance of 2 mm thick aluminium sheet derived f
31、rom 10 s exposure to a defocused beam during experiments using a CW CO laser 62 2Figure 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 62 2Figure F.9 Damage resistance of 1 mm thick stainless steel sheet deri
32、ved from 10 s exposure to a defocused beam during experiments using a CW CO laser 63 2Figure 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 .63 2Figure F.11 Damage resistance of 6 mm thick polycarbonat
33、e sheet derived from 10 s exposure to a defocused beam during experiments using a CW CO laser 64 2Figure 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 .64 2Figure F.13 Damage resistance of 1 mm thick zi
34、nc coated steel sheet derived from 10 s exposure to a defocused beam during experiments using a CW Nd:YAG laser .65 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 65 Figure F.15 Damage res
35、istance 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 .66 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 6
36、6 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 .67 BS EN 60825-4:2006+A2:2011EN 60825-4:2006+A2:2011 (E) 5 Figure F.18 Damage resistance of 3 mm thick zinc coated steel sheet derived from
37、 100 s exposure to a defocused beam during experiments using a CW Nd:YAG laser 67Figure 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 68 Figure F.20 Damage resistance of 2 mm thick aluminium sheet derive
38、d from 100 s exposure to a defocused beam during experiments using a CW Nd:YAG laser 68 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.69 Figure F.22 Damage resistance of 1 mm thick stainless
39、 steel sheet derived from 100 s exposure to a defocused beam during experiments using a CW Nd:YAG laser 69Table D.1 Laser guard test classification .28 .44 Table F.1 Application of ALARPBS EN 60825-4:2006+A2:2011EN 60825-4:2006+A2:2011 (E) 6 INTRODUCTION At low levels of irradiance or radiant exposu
40、re, the selection of material and thickness for shielding against laser radiation is determined primarily by a need to provide sufficient optical attenuation. However, at higher levels, an additional consideration is the ability of the laser radiation to remove guard material typically by melting, o
41、xidation or ablation; processes that could lead to laser radiation penetrating a normally opaque material. IEC 60825-1 deals with basic issues concerning laser guards, including human access, interlocking and labelling, and gives general guidance on the design of protective housings and enclosures f
42、or high-power lasers. This part of IEC 60825 deals with protection against laser radiation only. Hazards from secondary radiation that may arise during material processing are not addressed. Laser guards may also comply with standards for laser protective eyewear, but such compliance is not necessar
43、ily sufficient to satisfy the requirements of this standard. Where the term “irradiance” is used, the expression “irradiance or radiant exposure, as appropriate” is implied. BS EN 60825-4:2006+A2:2011EN 60825-4:2006+A2:2011 (E) 7 SAFETY OF LASER PRODUCTS Part 4: Laser guards 1 Scope This part of IEC
44、 60825 specifies the requirements for laser guards, permanent and temporary (for example for service), that enclose the process zone of a laser processing machine, and specifications for proprietary laser guards. This standard applies to all component parts of a guard including clear (visibly transm
45、itting) screens and viewing windows, panels, laser curtains and walls. Requirements for beam path components, beam stops and those other parts of a protective housing of a laser product which do not enclose the process zone are contained in IEC 60825-1. In addition this part of IEC 60825 indicates:
46、a) how to assess and specify the protective properties of a laser guard; and b) how to select a laser guard. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references,
47、 the latest edition of the referenced document (including any amendments) applies. Amendment 1 (1997) Amendment 2 (2001) ISO 12100-1:2003, Safety of machinery Basic concepts, general principles for design Part 1: Basic terminology, methodology ISO 12100-2:2003, Safety of machinery Basic concepts, ge
48、neral principles for design Part 2: Technical principles and specifications ISO 11553-1:2005, Safety of machinery Laser processing machines Safety requirements 3 Definitions For the purpose of this part of IEC 60825, the following definitions apply in addition to the definitions given in IEC 60825-1
49、 IEC 60825-1:2007, Safety of laser products Part 1: Equipment classification and requirements ISO 14121-1:2007, Safety of machinery Risk assessment Part 1: Principles ISO 13849-1:2006, Safety of machinery Safety-related parts of control systems Part 1: General principles for design ababBS EN 60825-4:2006+A2:2011EN 60825-4:2006+A2:2011 (E) 8 3.1 active guard protection time for a given laser exposure
