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ISO TR 21477

M00000560

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ISO TR 21477 1st Edition, August 1, 2017 Optics and photonics - Preparation of drawings for optical elements and systems - Surface imperfection specification and measurement systems

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Description / Abstract: This document intends to guide the user to understand the origins, meanings and differences between the two systems of specifying and evaluating surface imperfections in ISO 10110-7 and ISO 14997, specifically the dimensional method and the visibility method, and to provide information on how to use them. Tables are provided to show specifications of roughly equivalent yield loss for imperfections in the two systems.