Patent ID: 7273287

Claim:
An optical device, comprising: an electro-optic device including a plurality of optical modulators that modulate a plurality of color lights in accordance with image information, and a color-combining optical device that has a plurality of light incident surfaces where the plurality of optical modulators are attached and combines the color lights respectively modulated by the plurality of optical modulators to form an optical image; a projection optical device that projects the optical image formed by the electro-optic device in an enlarged manner; and a supporting structure that unitizes the electro-optic device and the projection optical device, the supporting structure including: a supporting structure body having an opening for passing the optical image irradiated from the electro-optic device and attached to a base end of the projection optical device; mounts respectively fixed on end surfaces intersecting the plurality of light incident surfaces of the color-combining optical device; and spacers interposed between the supporting structure body and the mounts, wherein a light irradiation surface of the color-combining optical device is a planar rectangle, and the spacers are respectively disposed between the supporting structure body and the mounts near four corners of light irradiation surfaces of the color-combining optical device.