Patent ID: 6186629
Filing Date: 2001-02-13
Classification: G03B,H04N

Abstract:
A display apparatus comprising:a light source adapted to emit a light beam,an illumination optical device adapted to act upon the emitted light beam;a light modulation device to which the light beam emitted from the light source is applied via the illumination optical device, the light modulation device modulating the applied light beam; anda projection lens for projecting the modulated light beam,the illumination optical device comprising:a first optical block including a first lens array having a plurality of cell lenses each being substantially similar in shape to the light modulation device but having substantially different aspherical surfaces in order to correct for spherical and chromatic aberrations;a second optical block including a second lens array having a plurality of cell lenses corresponding to respective cell lenses of the first lens array of the first optical block, and a first converging component for converging beams that have passed through the second lens array toward the light modulation device; anda second converging component disposed in the vicinity of the light modulation device, for imaging beams that are output from the second optical block at a predetermined position.