Patent ID: 6637891
Filing Date: 2003-10-28
Classification: G02B,H04N

Abstract:
An optical system for a liquid crystal projector composing monochromatic images realized in first to third reflective liquid crystal panels respectively for enlarging projection of the composed images, the optical system comprising:a light source emitting a white light; an illumination part transforming the white light into a predetermined linearly-polarized light and releasing the linearly-polarized light; a first color selector transforming to polarize the linearly-polarized light released from the illumination part into another linearly-polarized light in accordance with a wavelength region; and a color resolution/composition part having four triangular prism blocks joined together and having coated surfaces having different characteristics, the color resolution/composition part splitting an incident light from the first color selector in colors to be incident on the first to third reflective liquid crystal panels respectively and composing the light of which image information is acquired from the first to third liquid crystal panels to release the composed light to a projecting lens system for the enlarging projection, wherein the first to third liquid crystal panels are arranged to confront first to third faces of the color resolution/composition part in part, wherein the projecting lens system is arranged to confront a fourth face of the color resolution/composition part in part, and wherein the first color selector is arranged to confront another portion of the same face of the third liquid crystal panel.