Patent ID: 7270418

Claim:
An optical device including a plurality of optical modulators that modulate a light beam irradiated from a light source in accordance with image information, the optical device comprising: a plurality of optical modulator holders respectively holding the plurality of optical modulators and respectively having cooling chambers with a cooling fluid sealed therein to respectively cool the plurality of optical modulators with the cooling fluid in the respective cooling chambers; and a plurality of fluid circulators intercommunicated with the plurality of optical modulator holders to guide the cooling fluid to the outside of the respective cooling chambers and to re-introduce the cooling fluid into the respective cooling chambers, wherein a flow volume of the cooling fluid circulating in the respective optical modulator holders can be independently changed in accordance with heat values of the plurality of optical modulators, and wherein the plurality of fluid circulators include tubular members, tube diameters of which are different from each other in accordance with the heat values of the plurality of optical modulators.