Patent ID: 6840623

Claim:
A light recovery system for a projection display comprising: a reflector having a first and a second focal points; a source of electro-magnetic radiation disposed proximate to said first focal point of said reflector to emit rays of radiation that reflect from said reflector and converge substantially at said second focal point; a retro-reflector disposed opposite said reflector to reflect at least a portion of the electromagnetic radiation that does not impinge directly on said reflector toward said reflector through the first focal point of said reflector to increase the flux intensity of the converging rays; a light pipe having an input surface and an output surface, said input surface of said light pipe disposed proximate to said second focal point to collect and transmit substantially all of said radiation; a first reflector disposed proximate to said output surface, said first reflector transmitting a first band of said radiation and reflecting a second and third bands of said radiation; a second reflector disposed proximate to said output surface, said second reflector transmitting said second band of said radiation and reflecting said first and third bands of said radiation; and a third reflector disposed proximate to said output surface, said third reflector transmitting said third band of said radiation and reflecting said first and second bands of said radiation.