Patent ID: 8061844
Filing Date: 2011-11-22
Classification: G02F,G03B

Abstract:
1. An optical device, comprising: a plurality of reflection type light modulation devices which modulate received lights as entrance lights according to image information and release the modulated lights as emission lights; a plurality of reflection type polarization plates which separate the entrance lights entering the reflection type light modulation devices and the emission lights modulated by the reflection type light modulation devices according to polarization; a plurality of attachment members which support the reflection type light modulation devices and the reflection type polarization plates; a color combining device which has a plurality of light entrance surfaces through which lights separated by the plural reflection type polarization plates according to polarization enter and a light exit surface, combines the received respective lights into image light, and releases the image light through the light exit surface; a plurality of adjustment members which support the plural attachment members and are fixed to the light entrance surfaces of the color combining device; engaging projections provided on either the attachment members or the adjustment members and projecting toward the others of the attachment members and the adjustment members; and engaging receivers provided on the others of the attachment members and the adjustment members such that the engaging projections are inserted into the engaging receivers with clearances between the engaging receivers and the engaging projections.