PD IS0/TR 21477:2017 Bsl Standards Publication Optics and photonics Preparation of drawings for optical elements and systems Surface imperfection specification and measurement systems bsi. PDIS0/TR21477:2017 PUBLISHEDDOCUMENT National foreword This Published Document is the UK implementation of ISO/TR21477:2017. The UKparticipation inits preparation was entrustedto Technical Committee CPW/172, Optics and Photonics. A listoforganizationsrepresented onthis committee can be obtained on requestto its secretary. This publication does not purportto include all the necessary provisions ofa contract.Users areresponsiblefor its correctapplication. @The British Standards Institution2017 PublishedbyBSIStandardsLimited2017 ISBN9780580936166 ICS37.020 Compliance with aBritish Standard cannot conferimmunityfrom legal obligations. This Published Document waspublished underthe authority ofthe Amendments/corrigendaissuedsincepublication Date Text affected PD IS0/TR 21477:2017 TECHNICAL ISO/TR REPORT 21477 First edition 2017-08 Optics and photonics Preparation of drawings for optical elements and systems Surface imperfection specification and measurement systems Optiqueetphotonique-Préparationdesplanspour les élements systemes de mesure Reference number IS0/TR 21477:2017(E) ISO @IS02017