| 摘要 |
<p>The technique of the present invention reduces the chrominance nonuniformities of a projected image and improves the contrast. A projector has an illumination system (1A) that illuminates a modulation device (51) modulating light according to image information. The illumination system includes: a light source (10) that emits a light beam along a light source optical axis; a first lens array (21) having a plurality of small lenses (21a) which divide the light beam emitted from the light source into a plurality of partial light beams; a superimposing lens (23) that superimposes the plurality of partial light beams emitted from the first lens array on the modulation device such that light intensity distribution is substantially uniform on the modulation device; and an entrance angle reducing system (80) 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. <IMAGE></p> |
