| 摘要 |
<p>An LCD projector with an optical system comprising an illuminating device, an infrared filter, an optical system and a projecting lens. The illuminating device comprises a high luminance metal halide lamp as a light source. The infrared filter filters off infrared rays from the light emitted by the illuminating device. The optical system comprises a 45 DEG inclined B light transmission filter, a 45 DEG inclined G light reflection mirror, a 45 DEG inclined R image reflection mirror, a 45 DEG inclined B image transmission filter, three total reflection mirrors, three condensing lenses, three LCD panels. The optical system sequentially separates R, G and B light elements from the light having been transmitted through the infrared filter, then reemerging an image in respective colors by using the separated R, G and B light elements in order to compose the reemerged image. The projector lens projects the composed image from the optical system on a screen as an enlarged image. The LCD projector according to this invention can provide a compensation of the R light radiation by R optical path considerably longer than those of the G and the B optical paths, a considerably high luminance due to using the metal halide lamp, low manufacturing cost, an image of a good resolution power because of reducing the vignetting, also a compactness of its projection lens.</p> |
