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US 11,634,528 B2Granted
Latent imaging for volume Bragg gratings
AssigneeMeta Platforms Technologies, LLC
InventorsAustin Lane, Matthew E. Colburn
Life of this patent
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Abstract
Initiator/mediator chemistry for latent imaging polymers for volume Bragg gratings is provided. Light mediated chemistry including the use of nitroxides allows a first step imaging to occur, where a light induced pattern is recorded in the material, without the grating being apparent. A second bleaching/developing step completes the curing process and reveals the grating.
Claims10
A polymeric material comprising a resin mixture comprising:
- a partially or completely polymerized or crosslinked polymer matrix;
- a polymer precursor comprising a monomer M;
- and
- a group of Formula I:
- wherein IN is an initiating moiety optionally linked to, or part of, the matrix, -[M]- is a polymerized monomer, x is an integer from 0 to 50, and the group of Formula I is anisotropically distributed throughout the polymeric material.
2 more elements
Dependencies are inferred from the claim text.