A projection display system includes a light source emitting a randomly polarized light and a polarization recapture system including a tunnel integrator and a transmitting/reflecting polarizer coupled to the output end of the tunnel integrator. The input end of the tunnel integrator includes an input...http://www.google.com/patents/US6739723?utm_source=gb-gplus-sharePatent US6739723 - Polarization recapture system for liquid crystal-based data projectors
