EN ISO 21254-2:2011

Lasers and laser-related equipment - Test methods for laser-induced damage threshold - Part 2: Threshold determination (ISO 21254-2:2011)

ISO 21254-2:2011 describes 1-on-1 and S-on-1 tests for the determination of the laser-induced damage threshold of optical laser components. It is applicable to all types of laser and all operating conditions.

Laser und Laseranlagen - Prüfverfahren für die laserinduzierte Zerstörschwelle - Teil 2: Bestimmung der Zerstörschwelle (ISO 21254-2:2011)

Dieser Teil von ISO 21254 beschreibt 1-auf-1- und S-auf-1-Prüfungen zur Bestimmung von laserinduzierten Zerstörschwellen optischer Laserkomponenten. Sie ist auf alle Arten von Lasern und bei allen Einsatzbedingungen anwendbar.

Lasers et équipements associés aux lasers - Méthodes d'essai du seuil d'endommagement provoqué par laser - Partie 2: Détermination du seuil (ISO 21254-2:2011)

L'ISO 21254-2:2011 définit la détermination du seuil d'endommagement 1 sur 1 et S sur 1 provoqué par un rayonnement laser sur des composants optiques pour laser. Elle s'applique à tous les types de lasers et de conditions de fonctionnement.

Laserji in z laserji povezana oprema - Ugotavljanje praga poškodbe na optični površini, povzročene z laserjem - 2. del: Določanje praga poškodbe (ISO 21254-2:2011)

Ta del ISO 21254 opisuje preskuse 1-na-1 in S-na-1 za ugotavljanje praga poškodbe na optični površini laserskih komponent, povzročene z laserjem. Velja za vse vrste laserjev in za vse pogoje delovanja.

General Information

• Status: Published
• Publication Date: 14-Jul-2011
• Withdrawal Date: 30-Jan-2012
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: CEN/TC 123 - Lasers and photonics
• Drafting Committee: CEN/TC 123 - Lasers and photonics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 15-Jul-2011
• Due Date: 26-Sep-2010
• Completion Date: 15-Jul-2011
• Ref Project: SIST EN ISO 21254-2:2011 - Lasers and laser-related equipment - Test methods for laser-induced damage threshold - Part 2: Threshold determination (ISO 21254-2:2011)

Relations

• Replaces: EN ISO 11254-1:2000 - Lasers and laser-related equipment - Determination of laser-induced damage threshold of optical surfaces - Part 1: 1 on 1 test (ISO 11254-1:2000)
• Effective Date: 08-Jun-2022
• Replaces: EN ISO 11254-2:2001 - Lasers and laser-related equipment - Determination of laser-induced damage threshold of optical surfaces - Part 2: S-on-1 test (ISO 11254-2:2001)
• Effective Date: 08-Jun-2022
• Replaces: EN ISO 11254-2:2001/AC:2002 - Lasers and laser-related equipment - Determination of laser-induced damage threshold of optical surfaces - Part 2: S-on-1 test (ISO 11254-2:2001)
• Effective Date: 23-Jul-2011

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2011
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SIST EN ISO 11254-1:2000
SIST EN ISO 11254-2:2002
SIST EN ISO 11254-2:2002/AC:2003
/DVHUMLLQ]ODVHUMLSRYH]DQDRSUHPD8JRWDYOMDQMHSUDJDSRãNRGEHQDRSWLþQL
SRYUãLQLSRY]URþHQH]ODVHUMHPGHO'RORþDQMHSUDJDSRãNRGEH,62

Lasers and laser-related equipment - Test methods for laser-induced damage threshold -
Part 2: Threshold determination (ISO 21254-2:2011)
Laser und Laseranlagen - Prüfverfahren für die laserinduzierte Zerstörschwelle - Teil 2:
Bestimmung der Zerstörschwelle (ISO 21254-2:2011)
Lasers et équipements associés aux lasers - Méthodes d'essai du seuil
d'endommagement provoqué par laser - Partie 2: Détermination du seuil (ISO 21254-
2:2011)
Ta slovenski standard je istoveten z: EN ISO 21254-2:2011
ICS:
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 21254-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2011
ICS 31.260 Supersedes EN ISO 11254-1:2000, EN ISO 11254-2:2001
English Version
Lasers and laser-related equipment - Test methods for laser-
induced damage threshold - Part 2: Threshold determination
(ISO 21254-2:2011)
Lasers et équipements associés aux lasers - Méthodes Laser und Laseranlagen - Prüfverfahren für die
d'essai du seuil d'endommagement provoqué par laser -
laserinduzierte Zerstörschwelle - Teil 2: Bestimmung der
Partie 2: Détermination du seuil (ISO 21254-2:2011) Zerstörschwelle (ISO 21254-2:2011)
This European Standard was approved by CEN on 14 July 2011.

CEN members are bound to comply with 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 CEN-CENELEC Management Centre or to any CEN 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 CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21254-2:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 21254-2:2011) has been prepared by Technical Committee ISO/TC 172 "Optics and
photonics" in collaboration with Technical Committee CEN/TC 123 “Lasers and photonics” the secretariat of
which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by January 2012, and conflicting national standards shall be withdrawn at
the latest by January 2012.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11254-1:2000, EN ISO 11254-2:2001.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 21254-2:2011 has been approved by CEN as a EN ISO 21254-2:2011 without any
modification.
INTERNATIONAL ISO
STANDARD 21254-2
First edition
2011-07-15
Lasers and laser-related equipment —
Test methods for laser-induced damage
threshold —
Part 2:
Threshold determination
Lasers et équipements associés aux lasers — Méthodes d'essai
du seuil d'endommagement provoqué par laser —
Partie 2: Détermination du seuil

Reference number
ISO 21254-2:2011(E)
©
ISO 2011
ISO 21254-2:2011(E)
©  ISO 2011
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved

ISO 21254-2:2011(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Test methods .1
4.1 General .1
4.2 1-on-1 test method .1
4.3 S-on-1 test method .3
5 Accuracy.7
6 Test report.7
6.1 General .7
6.2 1-on-1 test.8
6.3 S-on-1 test .8
Annex A (informative) Example of a measurement procedure (1-on-1 test).9
Annex B (informative) Example of a test report for a 1-on-1 test.15
Annex C (informative) Example of a measurement procedure (S-on-1 test) .20
Annex D (informative) Example of a test report for an S-on-1 test.24
Annex E (informative) Extrapolation method for S-on-1 tests .31
Annex F (informative) Conversion of damage data into defect densities.33
Bibliography.36

ISO 21254-2:2011(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 21254-2 was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee SC 9,
Electro-optical systems.
This first edition of ISO 21254-2:2011, together with ISO 21254-1:2011, cancels and replaces
ISO 11254-1:2000 and ISO 11254-2:2001, which have been technically revised.
ISO 21254 consists of the following parts, under the general title Lasers and laser-related equipment — Test
methods for laser-induced damage threshold:
⎯ Part 1: Definitions and general principles
⎯ Part 2 : Threshold determination
⎯ Part 3: Assurance of laser power (energy) handling capabilities
⎯ Part 4: Inspection, detection and measurement [Technical Report]
iv © ISO 2011 – All rights reserved

ISO 21254-2:2011(E)
Introduction
This part of ISO 21254 specifies test methods for determining single-shot and multiple-shot laser-induced
damage thresholds (LIDTs) of optical components, both coated and uncoated. The aim is to provide methods
which will enable measurement results to be obtained which are consistent and can be rapidly and accurately
compared between different test laboratories.
In the single-shot test, which is referred to as the 1-on-1 test in this International Standard, each unexposed
site on the sample surface is subjected to only one pulse of laser radiation. Repeated laser radiation pulses
can damage optical components, or otherwise cause them to deteriorate, at irradiation levels below those
measured for single-shot damage. Besides reversible effects induced by thermal heating and distortion,
irreversible damage due to ageing, microdamage and the generation or migration of defects is observed. The
degradation of the optical quality is a function of the laser operating parameters and the optical system in
which the component is located. The multiple-shot test, referred to as the S-on-1 test, is based on a protocol
that uses a series of pulses with constant energy density at each unexposed test site.
In addition to an evaluation technique based on the survival curve for 1-on-1 tests, this part of ISO 21254 also
describes two methods for the reduction of raw data obtained from S-on-1 damage tests: one using the
characteristic damage curve and the other an extrapolation technique. The characteristic damage curve
method calls for S-on-1 testing at a large number of sites on the optical surface of the specimen and
generation of a set of three graphs indicating energy density values corresponding to probabilities of damage
of 10 %, 50 % and 90 % for a selected number of pulses. The characteristic damage curve represents the
results of a complete and extended laser-induced damage test, and it is recommended for basic investigations
in newly developed or critical laser optics. The second method of S-on-1 testing, the extrapolation method,
uses a considerably smaller number of test sites. This method generates a distribution diagram of the
damaged and undamaged regions for the behaviour of the damage threshold as a function of the number of
pulses per site. This diagram is of limited reliability but may be employed for the quality control of optical laser
components which have already been qualified by a complete damage test or as part of the preparation for
extended damage testing.
Realistic laser damage tests suitable for industrial applications require a large number of pulses (10 to
10 pulses) and hence involve a disproportionate experimental cost. This part of ISO 21254 therefore also
outlines a procedure for obtaining the S-on-1 threshold by extrapolation of the characteristic damage curve in
order to estimate the real lifetime of an optical component.
NOTE It should be realized that the laser-induced damage threshold of an optical component which is subjected to
repeated pulses of radiation can be affected by a variety of different degradation mechanisms, including contamination,
thermal heating, migration or generation
...