Patent ID: 8721085

Claim:
An image display device comprising: a plurality of illumination systems each adapted to emit a light beam, the light beams emitted from the plurality of illumination systems having wavelengths different from each other; a plurality of light modulation elements provided so as to correspond one-to-one to the plurality of illumination systems and each being adapted to modulate the light beams emitted from each of the illumination systems; a projection optical system adapted to project the light beam modulated by the light modulation element; and a color combination element disposed on a light path between the plurality of the light modulation elements and the projection optical element, and adapted to combine light beams emitted from the plurality of light modulation elements, wherein a proceeding direction of a principal ray of the light beam modulated by the light modulation element is nonparallel to an optical axis of the projection optical system when the light beam modulated by the light modulation element enters the projection optical system, and wherein at least one of the plurality of illumination systems is disposed at a position shifted in a direction which is perpendicular to an imaginary plane, the imaginary plane being a plane on which central positions of light entrance areas of the first through third light modulation elements lie, wherein in a Fourier transform plane of the projection optical system a spot formed from the light beam projected by the projection optical system is positioned away from the optical axis of the projection optical system.