EN ISO 11254-2:2001
(Main)Lasers and laser-related equipment - Determination of laser-induced damage threshold of optical surfaces - Part 2: S-on-1 test (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)
This standard specifies a test method for determining the laser radiation induced damage threshold of optical surfaces subjected to a succession of similar laser pulses.
Laser und Laseranlagen - Bestimmung der laserinduzierten Zerstörschwelle optischer Oberflächen - Teil 2: S auf 1-Prüfung (ISO 11254-2:2001)
Dieser Teil von ISO 11254 legt ein Prüfverfahren zur Bestimmung der laserinduzierten Zerstörschwelle von optischen Oberflächen, die einer Serie gleichartiger Laserpulse ausgesetzt wurden, fest.
Lasers et équipements associés aux lasers - Détermination du seuil d'endommagement provoqué par laser sur les surfaces optiques - Partie 2: Essai S sur 1 (ISO 11254-2:2001)
La présente partie de l'SO 11254 spécifie une méthode d'essai pour déterminer le seuil d'endommagement causé par un rayonnement laser simple sur les surfaces optiques soumises à une succession d'impulsions laser.
Laserji in z laserji povezana oprema - Ugotavljanje praga poškodbe na optični površini, povzročene z laserjem - 2. del: Preskus S na 1 (ISO 11254-2:2001)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2002
/DVHUMLLQ]ODVHUMLSRYH]DQDRSUHPD8JRWDYOMDQMHSUDJDSRãNRGEHQDRSWLþQL
SRYUãLQLSRY]URþHQH]ODVHUMHPGHO 3UHVNXV6QD ,62
Lasers and laser-related equipment - Determination of laser-induced damage threshold
of optical surfaces - Part 2: S-on-1 test (ISO 11254-2:2001)
Laser und Laseranlagen - Bestimmung der laserinduzierten Zerstörschwelle optischer
Oberflächen - Teil 2: S auf 1-Prüfung (ISO 11254-2:2001)
Lasers et équipements associés aux lasers - Détermination du seuil d'endommagement
provoqué par laser sur les surfaces optiques - Partie 2: Essai S sur 1 (ISO 11254-
2:2001)
Ta slovenski standard je istoveten z: EN ISO 11254-2:2001
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 11254-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2001
ICS 31.260
English version
Lasers and laser-related equipment - Determination of laser-
induced damage threshold of optical surfaces - Part 2: S-on-1
test (ISO 11254-2:2001)
Lasers et équipements associés aux lasers - Détermination Laser und Laseranlagen - Bestimmung der laserinduzierten
du seuil d'endommagement provoqué par laser sur les Zerstörschwelle optischer Oberflächen - Teil 2: S auf 1-
surfaces optiques - Partie 2: Essai S sur 1 (ISO 11254- Prüfung (ISO 11254-2:2001)
2:2001)
This European Standard was approved by CEN on 15 September 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
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Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11254-2:2001 E
worldwide for CEN national Members.
CORRECTED 2002-09-18
Foreword
This document (EN ISO 11254-2:2001) has been prepared by Technical Committee ISO/TC
172 "Optics and optical instruments" in collaboration with Technical Committee CEN/TC 123
"Lasers and laser related equipment", 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 March 2002, and conflicting national
standards shall be withdrawn at the latest by March 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.
Endorsement notice
The text of ISO 11254-2:2001 has been approved by CEN as EN ISO 11254-2:2001 without
any modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions
of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications,
indicated by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 11145 2001 Optics and optical instruments - Lasers and EN ISO 11145 2001
laser-related equipment - Vocabulary and
symbols
INTERNATIONAL ISO
STANDARD 11254-2
First edition
2001-09-15
Lasers and laser-related equipment —
Determination of laser-induced damage
threshold of optical surfaces —
Part 2:
S-on-1 test
Lasers et équipements associés aux lasers — Détermination du seuil
d'endommagement provoqué par laser sur les surfaces optiques —
Partie 2: Essai S sur 1
Reference number
ISO 11254-2:2001(E)
©
ISO 2001
ISO 11254-2:2001(E)
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ii © ISO 2001 – All rights reserved
ISO 11254-2:2001(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Normative references .1
3 Terms, definitions and symbols.1
3.1 Terms and definitions .1
3.2 Symbols and units.4
4 Sampling.4
5 Test method.4
5.1 General.4
5.2 Principle.5
5.3 Apparatus .6
5.4 Preparation of test specimens .11
5.5 Procedure .11
6 Evaluation.11
6.1 Principle.11
6.2 Characteristic damage curve.12
6.3 Extrapolation method.13
7 Accuracy.15
8 Test report .16
Annex A (informative) Example of test report .18
Annex B (informative) Example of a measurement procedure.21
Annex C (informative) Extrapolation method for S-on-1 tests .25
Annex D (informative) Units and scaling of laser-induced damage thresholds .26
Bibliography.27
ISO 11254-2:2001(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 3.
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 part of ISO 11254 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 11254-2 was prepared by Technical Committee ISO/TC 172, Optics and optical
instruments, Subcommittee SC 9, Electro-optical systems.
ISO 11254 consists of the following parts, under the general title Lasers and laser-related equipment —
Dtermination of laser-induced damage threshold of optical surfaces:
� Part 1: 1-on-1 test
� Part 2: S-on-1 test
Annexes A to D of this part of ISO 11254 are for information only.
iv © ISO 2001 – All rights reserved
ISO 11254-2:2001(E)
Introduction
Repetitive laser radiation may deteriorate and damage optical surfaces at irradiation levels below those measured
for single shot damage (ISO 11254-1 refers). Besides reversible mechanisms induced by thermal heating and
distortion, irreversible damage mechanisms due to ageing, microdamage and generation or migration of defects
are observed. This part of ISO 11254 is concerned with the determination of irreversible damage of optical surfaces
under the influence of a repetitively pulsed laser beam. The degradation of the optical quality is a function of the
laser operating parameters and the optical system in which the component is placed.
In this part of ISO 11254, two evaluation methods are described for the reduction of raw data of a damage test. The
characteristic damage curve method is based on a large number of S-on-1 test sites on the optical surface of the
specimen. The characteristic damage curve comprises a set of three graphs indicating energy density values with
damage probability values 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, the extrapolation method, is created from a considerably smaller number of test sites. This
method generates a distribution diagram of damage and non-damage regions for the behaviour of the damage
threshold as a function of the number of pulses per site. This diagram is of limited reliability and may be employed
for the quality control of optical laser components, which are already qualified by a complete damage t
...
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