ISO 15902:2019

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ISO 15902:2019 is an international standard that defines the terminology for diffractive optical elements. It was published on December 1, 2019. 

This document defines the basic terms for diffractive optical elements for free space propagation. The purpose of this document is to provide an agreed-upon common terminology that reduces ambiguity and misunderstanding and thereby aid in the development of the field of diffractive optics.