Patent ID: 9678321
Date: 2017-06-13
CPC Classifications: G02B,H01L,H02S,Y02E

Claim:
1. An optical structure, comprising: a layer of optically transmissive material defined by a first broad area surface and an opposing second broad area surface extending parallel to said first surface; an optically absorptive layer disposed in contact with said second surface and in an energy exchange relationship with said layer of optically transmissive material; and a plurality of light deflecting elements distributed within said layer of optically transmissive material; wherein each of the plurality of said light deflecting elements is configured to deflect a light ray propagating transversally through said layer of optically transmissive material away from a surface normal so as to form a propagation angle of said light ray with respect to said surface normal, above a predefined critical angle, and wherein said predefined critical angle is selected to result in a multiple transversal passage of light through said optically absorptive layer.