OPTICAL ELEMENT FOR A DEEP ULTRAVIOLET LIGHT SOURCE
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United States of America
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Issued Date -
Mar 31, 2022
app pub date -
Feb 5, 2020
filing date -
Feb 5, 2020
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Abstract
An optical element for a deep-ultraviolet light source includes a crystalline substrate; a coating on an exterior surface of the crystalline substrate, the coating having a thickness along a direction that extends away from the exterior surface; and a structure on and/or in the coating, the structure including a plurality of features that extend away from the crystalline substrate along the direction. The features include an amorphous dielectric material and are arranged such that an index of refraction of the structure varies along the direction.
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