Housing for mounting a beamsplitter and a spatial light modulator with an output optical path

摘要

A housing ( 500 ) for a wire grid polarizing beamsplitter ( 240 ) and a spatial light modulator ( 210 ) in alignment with an output optical path has a front plate having an opening ( 502 ) for admitting incident illumination and a modulator mounting plate ( 506 ) for mounting the spatial light modulator ( 210 ) in the optical output path. First and second polarizer support plates ( 512, 520 ) extend between the front plate and the modulator mounting plate ( 506 ), with their respective facing inner surfaces providing coplanar support features for supporting the wire grid polarizing beamsplitter ( 240 ) within a fixed plane. The coplanar support features allow rotation of the wire grid polarizing beamsplitter ( 240 ) with respect to the output axis. The wire grid polarizing beamsplitter ( 240 ) has its surface at a fixed angle with respect to the surface of the spatial light modulator ( 210 ), the angle defining an output optical axis along the output optical path.