Patent ID: 6520643
Filing Date: 2003-02-18
Classification: G03B

Abstract:
An imaging system, comprising:an output screen; means for generating light; a light source system for projecting an image on said output screen with polarized light such that a first portion of light of a first polarization state from the means for generating light is output for imaging without change of polarization state and a second portion of light of a second polarization state is converted to polarized light of the first polarization state for display on said screen and said light source system including: (a) a lens for projecting an enlarged image onto said screen; (b) a first set of polarization selective light reflecting elements, including a first reflecting element which passes image light of a first polarization state and reflects the image light of a second polarization state, a second element which converts the image light of the second polarization state into the image light of a first circular polarization state such that the image light of the first circular polarization state is transmitted by said first set of reflecting elements and output for viewing on said screen and the image light of the first circular polarization state is further processed; and (c) a second set of polarization selective partially curved light reflecting elements which are at least one of curved and tilted and including a second reflecting element which reflects the image light of the first circular polarization state while converting it to a second circular polarization state, the second circular polarization state being orthogonal to the first circular polarization state, the image light is converted to the first polarization state by passage through the first polarization converting element, and thereby passes through the first reflecting element further projecting the image light onto said screen.