AS/NZS IEC 60825.4:2023
Safety of laser products, Part 4: Laser guards
Standard identically adopts IEC 60825 4:2022, which 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 document applies to all component parts of a guard including clear (visibly transmitting) screens and viewing windows, panels, laser curtains and walls.
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AS/NZS IEC 60825.4:2023 Safety of laser products Laser guards
English
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements for laser guards
4.1 Requirement
4.2 Design requirements
4.3 Performance requirements
4.4 Validation
4.5 User information
5 Proprietary laser guards
5.1 General
5.2 Design requirements
5.3 Performance requirements
5.4 Specification requirements
5.5 Test requirements
5.6 Labelling requirements
5.7 User information
Annexes
Annex A (informative) General guidance on the design and selection of laser guards
A.1 Design of laser guards
A.2 Selection of laser guards
Annex B (informative) Assessment of foreseeable exposure limit (FEL)
B.1 General
B.2 Reflection of laser radiation
B.3 Examples of assessment conditions
B.4 Exposure duration
Annex C (informative) Elaboration of defined terms
C.1 Distinction between FEL and PEL
C.2 Active guard parameters
Annex D (normative) Proprietary laser guard testing
D.1 General
D.2 Test conditions
D.3 Protection time corresponding to the specified protective exposure limit (PEL)
D.4 Information supplied by the manufacturer
Annex E (informative) Guidelines on the arrangement and installation of laser guards
E.1 Overview
E.2 General
E.3 Risk assessment
E.4 Examples of risk assessment
E.5 Aids to risk assessment
Annex F (informative) Guideline for assessing the suitability of laser guards
F.1 Identification of hazards
F.2 Risk assessment and integrity
F.3 General design
F.4 Selection of safeguards
F.5 Guard design and construction
F.6 Guard construction and materials
F.7 Other safety devices
F.8 Interlocking considerations
F.9 Environmental considerations
F.10 Installation consideration – Environmental factors – Services
F.11 Maintenance and service considerations
Annex G (normative) Guided beam delivery systems
G.1 General
G.2 General requirements
G.3 Verification of safety requirements or protective measures
G.4 Information for users
G.5 Examples of risk assessments
Bibliography
Figures
Figure€B.1 – Calculation ofdiffuse reflections
Figure€B.2 – Calculation ofspecular reflections
Figure€B.3 – Some examples of a foreseeable fault condition
Figure B.4 – Four examples of errant laser beams that might have to be contained by a temporary guard under service conditions
Figure€B.5 – Illustration of laser guard exposure duringrepetitive machine operation
Figure€B.6 – Two examples of assessed duration of exposure
Figure€B.7 – Assessed duration of exposure for a machinewith no safety monitoring
Figure€C.1 – Illustration of guarding around a laserprocessing machine
Figure€C.2 – Illustration of active laser guard parameters
Figure€D.1 – Simplified diagram of the test arrangement
Figure€D.2 – Simplified diagram of the ventilation for the guard under test
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
Figure F.11 – Damage resistance of 6 mm thick polycarbonate sheetderived from 10 s exposure to a defocused beam during experiments using a CW CO2 laser
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 CO2 laser
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
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
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
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
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
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
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
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
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
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
Tables
Table€D.1 – Laser guard test classification
Table€F.1 – Application of ALARP
Table€G.1 – Beam delivery systems using free space beam delivery systems
Table€G.2 – Beam delivery systems using fibre optic cables
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AS/NZS IEC 60825.4:2023 Safety of laser products Laser guards
English
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements for laser guards
4.1 Requirement
4.2 Design requirements
4.3 Performance requirements
4.4 Validation
4.5 User information
5 Proprietary laser guards
5.1 General
5.2 Design requirements
5.3 Performance requirements
5.4 Specification requirements
5.5 Test requirements
5.6 Labelling requirements
5.7 User information
Annexes
Annex A (informative) General guidance on the design and selection of laser guards
A.1 Design of laser guards
A.2 Selection of laser guards
Annex B (informative) Assessment of foreseeable exposure limit (FEL)
B.1 General
B.2 Reflection of laser radiation
B.3 Examples of assessment conditions
B.4 Exposure duration
Annex C (informative) Elaboration of defined terms
C.1 Distinction between FEL and PEL
C.2 Active guard parameters
Annex D (normative) Proprietary laser guard testing
D.1 General
D.2 Test conditions
D.3 Protection time corresponding to the specified protective exposure limit (PEL)
D.4 Information supplied by the manufacturer
Annex E (informative) Guidelines on the arrangement and installation of laser guards
E.1 Overview
E.2 General
E.3 Risk assessment
E.4 Examples of risk assessment
E.5 Aids to risk assessment
Annex F (informative) Guideline for assessing the suitability of laser guards
F.1 Identification of hazards
F.2 Risk assessment and integrity
F.3 General design
F.4 Selection of safeguards
F.5 Guard design and construction
F.6 Guard construction and materials
F.7 Other safety devices
F.8 Interlocking considerations
F.9 Environmental considerations
F.10 Installation consideration – Environmental factors – Services
F.11 Maintenance and service considerations
Annex G (normative) Guided beam delivery systems
G.1 General
G.2 General requirements
G.3 Verification of safety requirements or protective measures
G.4 Information for users
G.5 Examples of risk assessments
Bibliography
Figures
Figure€B.1 – Calculation ofdiffuse reflections
Figure€B.2 – Calculation ofspecular reflections
Figure€B.3 – Some examples of a foreseeable fault condition
Figure B.4 – Four examples of errant laser beams that might have to be contained by a temporary guard under service conditions
Figure€B.5 – Illustration of laser guard exposure duringrepetitive machine operation
Figure€B.6 – Two examples of assessed duration of exposure
Figure€B.7 – Assessed duration of exposure for a machinewith no safety monitoring
Figure€C.1 – Illustration of guarding around a laserprocessing machine
Figure€C.2 – Illustration of active laser guard parameters
Figure€D.1 – Simplified diagram of the test arrangement
Figure€D.2 – Simplified diagram of the ventilation for the guard under test
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
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 CO2 laser
Figure F.11 – Damage resistance of 6 mm thick polycarbonate sheetderived from 10 s exposure to a defocused beam during experiments using a CW CO2 laser
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 CO2 laser
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
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
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
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
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
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
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
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
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
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
Tables
Table€D.1 – Laser guard test classification
Table€F.1 – Application of ALARP
Table€G.1 – Beam delivery systems using free space beam delivery systems
Table€G.2 – Beam delivery systems using fibre optic cables
Previous versions
AS/NZS IEC 60825.4:2023
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.