Patent ID: 8213088

Claim:
An optical device for an image projector, the device having an input path for receiving light of a plurality of different bands of wavelengths from a light source ( 0 S 1 ), the device comprising: a first dichroic mirror or splitter (DM 1 ) arranged in said input path and being adapted to output a) by reflection onto a first path, a first portion of a first one of said different bands of wavelengths and a first portion of a second one of said different bands of wavelengths, and b) by transmission onto a second path, a second portion of said first one of said different bands of wavelengths and a second portion of said second one of said different bands of wavelengths, wherein said first and second portions are spectrally different, light modulating devices (OM 1 , 0 M 2 ) arranged in respective ones of said first and second paths to receive said first and second portions, and to generate and output on respective first and second intersecting output paths modulated ones of said first and second portions, and a second dichroic mirror or combiner (DM 2 ), being adapted to reflect one and transmit the other of said first and second portions, and being arranged in an area of intersection of said first and second intersecting output paths to output, by reflection and transmission, said modulated ones of said first and second portions on a common output path.