prEN ISO 21254-1

Lasers and laser-related equipment - Test methods for laser-induced damage threshold - Part 1: Definitions and general principles (ISO/DIS 21254-1:2024)

ISO 21254-1:2011 defines terms used in conjunction with, and the general principles of, test methods for determining the laser-induced damage threshold and for the assurance of optical laser components subjected to laser radiation.

Laser und Laseranlagen - Prüfverfahren für die laserinduzierte Zerstörschwelle - Teil 1: Begriffe und allgemeine Grundsätze (ISO/DIS 21254-1:2024)

Lasers et équipements associés aux lasers - Méthodes d'essai du seuil d'endommagement provoqué par laser - Partie 1: Définitions et principes de base (ISO/DIS 21254-1:2024)

L'ISO 21254-1:2011 définit les termes et les principes de base des méthodes d'essai permettant de déterminer le seuil d'endommagement provoqué par laser et de vérifier les composants optiques du laser soumis à un rayonnement laser.

Laserji in z laserji povezana oprema - Preskusne metode za ugotavljanje praga poškodbe, povzročene z laserjem - 1. del: Definicije in splošna načela (ISO/DIS 21254-1:2024)

General Information

• Status: Not Published
• Publication Date: 30-Nov-2025
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: CEN/TC 123 - Lasers and photonics
• Drafting Committee: CEN/TC 123 - Lasers and photonics
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 29-Jul-2024
• Completion Date: 29-Jul-2024
• Ref Project: oSIST prEN ISO 21254-1:2024 - Lasers and laser-related equipment - Test methods for laser-induced damage threshold - Part 1: Definitions and general principles (ISO/DIS 21254-1:2024)

Relations

• Revises: EN ISO 21254-1:2011 - Lasers and laser-related equipment - Test methods for laser-induced damage threshold - Part 1: Definitions and general principles (ISO 21254-1:2011)
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2024
Laserji in z laserji povezana oprema - Preskusne metode za ugotavljanje praga
poškodbe, povzročene z laserjem - 1. del: Definicije in splošna načela (ISO/DIS
21254-1:2024)
Lasers and laser-related equipment - Test methods for laser-induced damage threshold -
Part 1: Definitions and general principles (ISO/DIS 21254-1:2024)
Laser und Laseranlagen - Prüfverfahren für die laserinduzierte Zerstörschwelle - Teil 1:
Begriffe und allgemeine Grundsätze (ISO/DIS 21254-1:2024)
Lasers et équipements associés aux lasers - Méthodes d'essai du seuil
d'endommagement provoqué par laser - Partie 1: Définitions et principes de base
(ISO/DIS 21254-1:2024)
Ta slovenski standard je istoveten z: prEN ISO 21254-1
ICS:
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 21254-1
ISO/TC 172/SC 9
Lasers and laser-related
Secretariat: DIN
equipment — Test methods for
Voting begins on:
laser-induced damage threshold —
2024-05-06
Part 1:
Voting terminates on:
2024-07-29
Definitions and general principles
Lasers et équipements associés aux lasers — Méthodes d'essai du
seuil d'endommagement provoqué par laser —
Partie 1: Définitions et principes de base
ICS: 01.040.31; 31.260
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
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This document is circulated as received from the committee secretariat.
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PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 21254-1:2024(en)
DRAFT
ISO/DIS 21254-1:2024(en)
International
Standard
ISO/DIS 21254-1
ISO/TC 172/SC 9
Lasers and laser-related
Secretariat: DIN
equipment — Test methods for
Voting begins on:
laser-induced damage threshold —
Part 1:
Voting terminates on:
Definitions and general principles
Lasers et équipements associés aux lasers — Méthodes d'essai du
seuil d'endommagement provoqué par laser —
Partie 1: Définitions et principes de base
ICS: 01.040.31; 31.260
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
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or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
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TO SUBMIT, WITH THEIR COMMENTS,
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NOTIFICATION OF ANY RELEVANT PATENT
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Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 21254-1:2024(en)
ii
ISO/DIS 21254-1:2024(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Symbols and units of measurement.2
3.2 Terms and definitions .3
4 Units of laser irradiation, LIDT and pertinent units . 4
5 Laser damage, damage threshold and associated criteria . 4
5.1 General .4
5.1.1 Classical criterion of laser-induced damage .4
5.1.2 Functional criterion of laser-induced damage .5
5.1.3 Failure mode.5
5.1.4 Laser-induced damage threshold (LIDT) .5
5.1.5 Functional laser-induced damage threshold (F-LIDT) .5
5.1.6 Method of damage threshold calculation .5
5.2 Techniques of laser damage interrogation and related terms .5
5.2.1 General .5
5.2.2 Classical 1-on-1 test .5
5.2.3 Classical S-on-1 test .5
5.2.4 Functional R(S)-on-1 test .6
5.2.5 Functional Raster Scan test .6
5.2.6 Acceptance test “Pass-fail” .6
5.2.7 Laser-induced fatigue .6
5.2.8 Characteristic damage curve or fatigue curve .6
5.2.9 Laser-induced conditioning .6
5.2.10 Conditioning curve .6
5.3 Parameters of testing, sampling and reporting .7
5.3.1 Typical pulse .7
5.3.2 Laser irradiation level, L .7
5.3.3 Maximum irradiation dose .7
5.3.4 Applied irradiation dose .7
5.3.5 Target plane .7
5.3.6 Total irradiated area, A .7
90 %
6 Sampling . 7
7 Test methods . 8
7.1 Principle .8
7.2 Apparatus .9
7.2.1 Laser .9
7.2.2 Variable attenuator and beam delivery system .9
7.2.3 Focusing system.9
7.2.4 Specimen holder .9
7.2.5 Damage detection and inspection systems .10
7.2.6 Beam diagnostic unit .10
7.3 Preparation of specimens for testing . 13
7.4 Procedure .14
8 Accuracy of peak irradiation level . 14
8.1 General .14
8.2 The relative standard deviation of peak fluence . 15
8.3 The relative standard deviation of peak irradiance . 15
8.4 The relative standard deviation of linear power density .16
8.5 The relative standard deviation of average peak irradiance .16

iii
ISO/DIS 21254-1:2024(en)
9 Test report . 17
Annex A (normative) Gene
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