Patent ID: 7357518

Claim:
A projector having a light source; an optical modulator for modulating light beam emitted from the light source according to image information and forming an optical image; and a projection lens, which includes a plurality of lenses and a lens barrel for containing the plurality of lenses thereinside, for enlarging and projecting the optical image formed by the optical modulator; the projector comprising: a structure showing a substantially L-shaped lateral contour and including an inner horizontal section to which the optical modulator is attached, and an outer vertical section to which the projection lens is attached, each of both sections having an L-shaped lateral contour; and a lens shifting mechanism for shifting the projection lens in a direction orthogonal to the central axis of the light beam emitted from the optical modulator along the outer vertical section; wherein the lens barrel has a flange projecting to the outside of the lens barrel at the base end side of the projection direction so as for the lens barrel to be fitted to the outer vertical section; the outer vertical section has a lens contacting surface projected and curved in accordance with a field curvature amount of the image forming surface on the base end side of the projection lens so as to contact the flange along the shifting direction being shifted by the lens shifting mechanism; and the projection lens moves along the lens contacting surface as the projection lens is shifted by the lens shifting mechanism.