Patent ID: 7131737

Claim:
A housing for mounting a beamsplitter and a spatial light modulator in alignment with an output optical path, comprising: (a) a front plate having an opening for admitting incident illumination provided along an illumination axis; (b) a modulator mounting plate, spaced apart from and substantially parallel to the front plate, for mounting the spatial light modulator in the optical output path of the illumination axis; (c) first and second polarizer support plates, spaced apart from each other and extending between the front plate and the modulator mounting plate; respective facing inner surfaces of the first and second support plates providing support features for supporting the beamsplitter between the facing inner surfaces within a fixed plane relative to the illumination axis, the support features being configured to allow rotation of the beamsplitter, over a range of angles, within the fixed plane; and the beamsplitter being extended between and substantially normal to the facing inner surfaces, the surface of the beamsplitter maintained at a fixed angle with respect to the surface of the spatial light modulator on the modulator mounting plate, the fixed angle defining an output optical axis and working distance along the output optical path.