BS IS0 19740:2018 Bsl Standards Publication Optics and photonics Optical materials and components Test method for homogeneity of infrared optical materials bsi. BSISO19740:2018 BRITISH STANDARD Nationalforeword This British Standard is the UK implementation of IS019740:2018. The UK participation in its preparation was entrusted to Technical Committee CPW/172, Optics and Photonics. A list of organizations represented on this committee can be obtained on requestto its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. TheBritish Standards Institution2018 Published by BSI Standards Limited 2018 ISBN9780580894954 ICS37.020 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the StandardsPolicyandStrategyCommitteeon31May2018. Amendments/corrigendaissuedsincepublication Date Textaffected BS ISO 19740:2018 ISO INTERNATIONAL STANDARD 19740 First edition 2018-05-11 Optics and photonics Optical materials and components - Test method for homogeneity of infrared optical materials Optique etphotonique-Materiaux et composants optiques- Méthodes d'essaipour déterminer I'homogéneite des matériaux optiques infrarouges Reference number IS0 19740:2018(E) ISO @ IS0 2018