Patent ID: 7188955
Filing Date: 2007-03-13
Classification: G03B

Abstract:
1. A reflective lighting optical system comprising: a lighting part disposed at a lower side of the optical system, the lighting part including a lamp for radiating lights and a dichroic mirror for allowing the lights of red, green and blue, which are radiated from the lamp and of which polarization components are aligned, to be divided into their respective paths; and a synthesizing part disposed at an upper side of the optical system, the synthesizing part including an imager for phase-shifting and reflecting the red, green and blue lights, a PBS disposed at an oblique angle with respect to the imager, for transmitting the red, green and blue lights divided into their respective paths by the dichroic mirror and for reflecting the red, green and blue light rays phase-shifted and reflected on the imager, and an X-prism for synthesizing the red, green and blue lights to allow the synthesized light to be incident to a projection lens; wherein the imager includes a plurality of sub-imagers, each of the sub-imagers corresponding to one of the red, green and blue lights, the plurality of sub-imagers being horizontally disposed on an identical horizontal plane.