Patent ID: 6997564
Filing Date: 2006-02-14
Classification: G03B

Abstract:
1. A digital projection display comprising: a light source producing as an output a light beam; an integrator that receives the light beam from the light source; an illumination lens that receives the light beam from the integrator; an illumination fold mirror that receives the light beam from the illumination lens; a light director that receives the light beam from the illumination fold mirror; a digital light modulator that receives the light beam from the light director and spatially modulates the light beam; a projection lens that receives the light beam in the spatially modulated form from the digital light modulator, wherein the projection lens has at least a first projection lens element and a second projection lens element spaced apart from the first projection lens element; a projection lens fold mirror disposed between the first projection lens element and the second projection lens element, wherein the light beam passes through the first projection lens element, reflects from the projection lens fold mirror, and passes through the second projection lens element; and a projection fold mirror that receives the light beam from the projection lens and redirects the light beam.