Patent ID: 6183091
Filing Date: 2001-02-06
Classification: G02B,G03B,H04N

Abstract:
A system for separating and combining three spectrums of light, comprising:first, second, third and fourth polarizing beamsplitters, wherein each polarizing beamsplitter is configured to allow light having a first polarization orientation to pass therethrough, wherein each polarizing beamsplitter is configured to reflect light having a second polarization orientation, and wherein each polarizing beamsplitter has two interior sides adjacent two other polarizing beamsplitters, and two exterior sides that are not adjacent other polarizing beamsplitters; anda first retarder stack located adjacent an exterior side of the first polarizing beamsplitter;a second retarder stack located adjacent an interior side of the first polarizing beamsplitter; anda third retarder stack located between interior sides of two of the polarizing beamsplitters.