ISO INTERNATIONAL STANDARD 9336-3 Second edition 2020-01 OpticsandphotonicsOptical transferfunctionApplication- Part 3: Telescopes Optiqueetinstrumentsd'optique-Fonctiondetransfertoptique Application- Partie3:Telescopes Reference number ISO0 9336-3:2020(E) tso @IS02020 IS0 9336-3:2020(E) COPYRIGHTPROTECTEDDOCUMENT IS02020 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may 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 CP401:Ch.de Blandonnet8 CH-1214 Vernier,Geneva Phone:+41227490111 Fax: +4122 749 09 47 Email:[email protected] Website: www.iso.org Published in Switzerland ii IS02020-Allrights reserved IS09336-3:2020(E) Contents Page Foreword iv Introduction .V 1 Scope .1 2 Normativereferences .1 3 Terms and definitions .1 4 General descriptionoftestspecimentypesandtherelevanceofoTFtests .1 5 Testarrangement. .2 5.1 General. 2 5.2 Arrangement ofoptical bench 2 5.3 Collimators .3 5.4 3 Spectralresponse. 5.5 Spatialfrequencyrange .3 5.6 Azimuths. 4 5.7 Preparingthetestspecimen 4 5.8 Auxiliaryequipment. .5 .5 6 NormalizationofoTFvalues 7 Testcondition .5 8 Specificationoftheimagingstate .5 8.1 Test specimen .5 8.2 Measuringequipment .6 .6 8.3 Measurement. 9 Presentation .8 10 Accuracyofequipment .8 AnnexA (informative)MTFTestmethodsusingdetectorarrays .9 AnnexB (informative)Derivinganobjective imagequalitycriterionfromtheMTF .13 Bibliography 17 IS0 2020-All rights reserved iii