Patent ID: 7130120
Filing Date: 2006-10-31
Classification: G02B

Abstract:
1. A prism for transmitting or reflecting incident light depending on polarized light components thereof, comprising: a pair of diffraction grid substrates; a substantially grid-shaped diffraction grid formed of metal, said substantially grid shaped diffraction grid disposed between said pair of diffraction grid substrates; a pair of adhesive layers, each adhesive layer of said pair of adhesive layers coupled to each substrate of said pair of diffraction grid substrates; and a pair of block members, each block member of said pair of block members coupled to said each adhesive layer, each block member of said pair of block members configured with a plurality of substantially equally-spaced flat plate members alternately layered with adhesive layers for optically coupling said each block member with substantially reduced optical distortion than when configured with a single transparent component, said each block member having a surface to output the polarized light transmitted or reflected from said substantially grid-shaped diffraction grid and passing through said plurality of substantially equally-spaced flat plate members.