Definition of grating substrate

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Optimax Systems, Inc. - Ultrafast Coatings 2024 LB

Photonics Dictionary

grating substrate: The substrate upon which a diffraction grating will be ruled. It must be dimensionally stable, and the surface must be polished to an accurate flat or spherical form as required by the grating. The substrate for a replica must have the identical but opposite form to the original substrate. For a reflecting grating the substrate need not be transparent, but for a transmission grating it must be transparent.

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