Patent ID: 6844993

Claim:
An optical device, comprising: a plurality of optical modulators that respectively modulate a plurality of color lights in accordance with image information; a color combining optical device that has a plurality of light-incident sides opposing to the respective optical modulators and combines the color lights modulated by the optical modulators; an optical converter interposed between the optical modulator and the light-incident side and having an optical conversion film on a substrate, the optical conversion film optically converting the color light irradiated by the optical modulator; a cooling device having a holding surface on which the optical converter is held, the cooling device being made of a thermally-conductive material and cooling the optical converter; a base provided on a side intersecting the light-incident side of the color combining optical device, the base having a cooling device attachment surface on which the cooling device is attached; and a fixing member attached on the light-incident side which locates and fixes the optical modulator on the light-incident side of the color combining optical device, the fixing member having a attachment surface on which an attachment member for attaching the optical modulator is attached.