Patent ID: 9465227
Filing Date: 2016-10-11
CPC Classification: G02B,G02F,G03B,G03H

Claim Text:
1. An ESBG despeckler apparatus comprising: a first ESBG element for diffracting a first polarization illumination light incident along an input path and transmitting a second polarization illumination light incident along said input path without substantial deviation; a second ESBG element for diffracting said first polarization light in a first direction into an output path and transmitting said second polarization light without substantial deviation into said output path; a first reflecting surface; a second reflecting surface; and a third reflecting surface, wherein, said first reflecting surface and said second reflecting surface reflecting second polarization light transmitted by said first ESBG element onto said second ESBG element in a direction parallel to said output path, said third reflecting surface reflecting first polarization light diffracted by said first ESBG element into said first direction onto said second ESBG element, each of said ESBG elements comprising at least one layer, at least one said ESBG element containing a layer comprising a multiplicity of ESBG pixels, and each said ESBG pixel having a first unique speckle state under a first applied voltage and a second unique speckle state under a second applied voltage.