Patent ID: 7004589

Claim:
A liquid crystal projector comprising: first to third liquid crystal elements for modulating light beams of three primary colors to output three color optical images respectively; a rectangular recombination prism for combining said three color optical images, said prism receiving said three color optical images on first and second side surfaces that are perpendicular to each other, and letting a combined optical image exit from a third side surface thereof; a projection lens system for projecting said combined optical image toward a screen, said projection lens system comprising a front lens group, a first rear lens group and a second rear lens group; a prism base plate on which a bottom side of said prism is fixed; and first, second and third frames formed integrally with said prism base plate in parallel to and in opposition to said first to third side surfaces of said prism respectively, each of said first to said third frames having an opening, wherein said first rear lens group is held in said opening of said first frame, said second rear lens group is held in said opening of said second frame, and said front lens group is held in said opening of said third frame.