ISO/TR TECHNICAL REPORT 20811 First edition 2017-08 Optics and photonics Lasers and laser-related equipment Laser- induced molecular contamination testing Qualification des composants optiques laser pour les applications spatiales Reference number ISO/TR 20811:2017(E) International Organization for Standardization @ IS0 2017 =ZHEJIANG INST OF STANDARDIZATION C1 5956617 Not for Resale, 2017/9/27 05:55:49 ed without license from IHS IS0/TR 20811:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel.+41 22 749 0111 Fax+41227490947 [email protected] www.iso.org Intenationai br PrganizationforStandardization icensee-ZHEJIANG INST.OF STANDARDIZRoISQ s1.7 - All rights reserved I by IHS unde Not for Resale, 2017/9/27 05:55:49 etworking permitted without license from IHS IS0/TR 20811:2017(E) Contents Page Foreword ..iv Introduction. 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols and abbreviated terms .2 5 Test method. .2 5.1 Test setup. .2 5.1.1 Vacuum chamber. .2 5.1.2 Laser source and optical beam line .3 5.2 Setup for data acquisition. .3 5.2.1 Beam profile monitoring. .3 5.2.2 Measurement of pulse energy and determination of transmission .3 5.2.3 Laser-induced fluorescence monitoring 4 5.3 Test preparation. .4 5.3.1 Bakeout 4 5.3.2 Pretreatment of optical samples .4 5.3.3 Blanktest 4 5.4 LIMCtest. .5 5.4.1 Test parameters .5 5.4.2 Individual steps for LIMC test. .5 5.5 Evaluation of test results .6 Bibliography .10 iii ee=ZHEJIANG INSTOFSTANDARDIZATION C15956617 vided by IHS under lic vithoutlicense from IHS Not for Resale, 2017/9/27 05:55:49