ISO INTERNATIONAL STANDARD 11551 Third edition 2019-10 Optics and photonics Lasers and laser-related equipment Test method for absorptance of optical laser components Optique et photonique Lasers et équipements associés aux lasers Méthode d'essai du facteur d'absorption des composants optiques pour lasers Reference number ISO 11551:2019(E) ISO @ IS0 2019 IS0 11551:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 0111 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved