A projector including an illumination system that illuminates a modulation device modulating light according to image information. The illumination system includes a light source that emits a light beam along a light source optical axis, a first lens array having a plurality of small lenses which divide the light beam emitted from the light source into a plurality of partial light beams, a superimposing lens that superimposes the plurality of partial light beams emitted from the first lens array on the modulation device, and an entrance angle reducing system disposed between the superimposing lens and the modulation device. The entrance angle reducing system reduces an entrance angle of light rays, which are emitted from the superimposing lens and enter the modulation device, compared with an illumination system without the entrance angle reducing system.
This is a continuation of application No. PCT/JP99/07130, filed Dec. 17, 1999.
CROSS-REFERENCE TO A RELATED APPLICATION
This application is related to Japanese Patent Application No. 10-362585 filed on Dec. 21, 1998, the entire contents of which are incorporated by reference.
Priority Data
Dec 21, 1998 [JP] 10-362585(P) Nov 22, 1999 [JP] 11-331083(P)
