ISO INTERNATIONAL STANDARD 11146-1 Second edition 2021-07 Lasers and laser-related equipment Test methods for laser beam widths, divergence angles and beam propagation ratios - Part 1: Stigmatic and simple astigmatic beams Lasers et équipements associés aux lasers Méthodes d'essai des largeurs du faisceau, angles de divergence et facteurs de limite de diffraction- Partie 1: Faisceaux stigmatiques et astigmatiques simples Reference number IS0 11146-1:2021(E) ISO @ ISO 2021 IS0 11146-1:2021(E) COPYRIGHT PROTECTED DOCUMENT @ iS0 2021 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 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 CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 0111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland i @ IS0 2021 - All rights reserved