BS IS0 19742:2018 BSl Standards Publication Optics and photonics - Optical materials and components - Test method for bubbles and inclusions in infrared optical materials bsi. BSISO19742:2018 BRITISH STANDARD Nationalforeword ThisBritishStandard is theUKimplementationofIS019742:2018. The UK participation in its preparation was entrusted to Technical CommitteeCPW/172,OpticsandPhotonics. Alistof organizations represented onthis committeecanbe obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. @TheBritishStandards Institution2018 Published by BSI Standards Limited 2018 ISBN9780580894978 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 Text affected BS ISO 19742:2018 INTERNATIONAL ISO STANDARD 19742 First edition 2018-05-11 Optics and photonics Optical materials and components - Test method for bubbles and inclusions in infrared optical materials Optiqueetphotonique-Matériauxetcomposantsoptiques Methodesd'essaipourdeterminerles impuretesdesmateriaux optiques infrarouges Reference number ISO 19742:2018(E) ISO @IS0 2018