Apodized diffraction grating with improved dynamic range
First Claim
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1. An optical grating, comprising:
- a substrate; and
a diffraction surface located on said substrate, said diffraction surface varying in diffraction efficiency as a function of distance from a reference location on said substrate.
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Abstract
An optical diffraction grating includes a substrate and a diffraction surface comprising, for example, diffraction grooves. The diffraction grating has a spatially varying diffraction efficiency which increases or decreases as a function of distance from a reference location at which an incident light beam is received at the grating. Spatially varying the diffraction efficiency of the grating may be accomplished by selectively changing or modifying one or more grating design parameters such as the shape, size, depth, profile, pitch, and optical properties of the diffraction grooves at predetermined locations on the grating.
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Citations
25 Claims
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1. An optical grating, comprising:
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a substrate; and
a diffraction surface located on said substrate, said diffraction surface varying in diffraction efficiency as a function of distance from a reference location on said substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An optical grating, comprising:
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a substrate; and
diffraction means located on said substrate, said diffraction means varying in diffraction efficiency as a function of distance from a reference location on said substrate. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification