Patent ID: 8004761

Claim:
A stereo projection optical system, comprising: a polarization converter configured for converting incident light into polarized light which has single polarization; a 2-way wheel positioned to receive the polarized light from the polarization converter and comprising a reflective region configured for reflecting the polarized light and a transmissive region configured for transmitting the polarized light, the polarized light incident on one of the reflective region and the transmissive region at any given time; a retarder positioned to receive a light emerging from one of the reflective region and the transmissive region; and an image engine positioned to receive light output of the 2-way wheel and the retarder and configured for emitting the light output comprising spatial information, wherein the image engine comprises: a polarizing beam splitter positioned to receive the light output of the 2-way wheel and the retarder; a digital micro-mirror device positioned to receive emergent light from the polarizing beam splitter; and a total internal reflective prism positioned to receive the light output from the polarizing beam splitter and configured for coupling the emergent light of the polarizing beam splitter into the digital micro-mirror device and transmitting the light output from the digital micro-mirror device.