IEC 60825-4:1997/AMD1:2002

Amendment 1 - Safety of laser products - Part 4: Laser guards

General Information

• Status: Published
• Publication Date: 07-Aug-2002
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: TC 76 - Optical radiation safety and laser equipment
• Drafting Committee: WG 7 - TC 76/WG 7
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 16-Aug-2006

Relations

• Amends: IEC 60825-4:1997 - Safety of laser products - Part 4: Laser guards
• Effective Date: 05-Sep-2023
• Revised: IEC 60825-4:2006 - Safety of laser products - Part 4: Laser guards
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
60825-4
AMENDMENT 1
2002-08
Amendment 1
Safety of laser products –
Part 4:
Laser guards
Amendement 1
Sécurité des appareils à laser –
Partie 4:
Barrières laser
 IEC 2002 Droits de reproduction réservés  Copyright - all rights reserved
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– 2 – 60825-4 Amend. 1 © IEC:2002(E)

FOREWORD
This amendment has been prepared by IEC technical committee 76: Optical radiation safety

and laser equipment.
The text of this amendment is based on the following documents:

FDIS Report on voting
76/242/FDIS 76/252/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until 2003. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
____________
Page 2
CONTENTS
Add the title of the new Annex D as follows:
Annex D (normative) Proprietary laser guard testing
Page 10
3.4.2 Sample testing
Replace subclauses 3.4.2.1 and 3.4.2.2 by the following new text:
Sample guard testing shall be performed by irradiating the front surface of the guard material
using the procedure and methodology as specified in Annex D.
Page 22
Add, after Annex C, the new Annex D as follows:

60825-4 Amend.1 © IEC:2002(E) – 3 –

Annex D
(normative)
Proprietary laser guard testing

D.1 General
It should be noted that it is inappropriate to use higher power lasers to simulate low power

laser parameters by adjustment of the distance from the focal point, because beam quality

and other characteristics of the laser beam are likely to be different or unexpected.
The evidence of the tests described herein is relevant only for, and is limited to, the laser
parameters used. Thus the results of these tests should serve only as a guide for laser guard
comparison purposes.
–
The protective exposure limit (PEL W·m ) shall be applicable only for the beam dimensions
at the guard used in the tests. These dimensions at the guard shall be stated by the laser
guard manufacturer because the limiting irradiance value, which indicates protection,
decreases as the laser beam dimensions increase.
D.2 Test conditions
–2 –2
The tested exposure limit (W·m for CW lasers or J·m for pulsed lasers) shall be
determined by tests performed when irradiating one surface of a sample of representative
thickness and composition and of dimensions not less than 3 times the maximum beam
dimension (1/e ) encountered at the exposure location (thereby guaranteeing that the radiant
heat flow is taken into account.) Structural connecting elements shall only be included in the
tests if they
...