Patent ID: 8113664

Claim:
A projector comprising: an illumination system that emits an illumination light flux; an electro-optic modulator that modulates the light from the illumination system in accordance with image information; and a projection system that projects the light modulated by the electro-optic modulator, wherein the projection system includes a first lens group including a plurality of lenses, the lens optical axis of the plurality of lenses shifted from the central axis of an image formation area of the electro-optic modulator in a first direction, a second lens group including a plurality of lenses, the second lens group disposed on the light-exiting side of the first lens group, a curved mirror disposed on the light-exiting side of the second lens group, and a reflective light guiding system disposed along the optical path between the first lens group and the curved mirror, the reflective light guiding system reflecting the light from the first lens group in a predetermined direction containing a second direction that is opposite the first direction as a vector component and guiding the light to the curved mirror, and wherein the reflective light guiding system includes: a first reflection element disposed between the first lens group and the second lens group, the first reflection element reflecting the light from the first lens group in the second direction, a second reflection element disposed between the first reflection element and the second lens group in such a way that a normal to the reflection plane of the second reflection element is perpendicular to a normal to the reflection plane of the first reflection element, and a third reflection element disposed between the second reflection element and the second lens group, the third reflection element reflecting the light from the second reflection element toward the second lens group, each of the reflection elements having a flat reflection plane.