Patent ID: 7118222
Filing Date: 2006-10-10
Classification: G03B,H04N

Abstract:
1. An optical device comprising: a plurality of optical modulators for respectively modulating a plurality of color lights according to image information; a color-combining optical device for combining and irradiating the respective color lights modulated by the optical modulators; a base made of heat-conductive material and fixed to at least either one of a pair of faces crossing with a light-incident face of the color-combining optical device; an optical conversion plate arranged on the downstream of the each optical modulator, the optical conversion plate having: an optical conversion film for converting an optical property of a light beam irradiated from the optical modulator; and a transparent member made of heat-conductive material on which the optical conversion film is attached; and a retaining plate made of heat-conductive material for supporting and fixing the optical conversion plate, the retaining plate having an opening for allowing the light beam to pass therethrough, wherein the retaining plate is fixed to a lateral face of the base, wherein at least two said optical conversion plates are provided as a first optical conversion plate and a second optical conversion plate, wherein the retaining plate includes: a plate member supporting and fixing the first optical conversion plate at the periphery of the opening; and a protrusion protruding from the plate member toward an out-of-plane direction and supporting and fixing the second optical conversion plate, wherein the plate member has a bonding portion attached to the lateral face of the base and a support portion supporting and fixing the first optical conversion plate, and wherein the support portion is recessed relative to the bonding portion toward a protruding direction of the protrusion.