Patent ID: 6347012
Filing Date: 2002-02-12
Classification: G02B,G03B

Abstract:
A rear projection console to limit luminosity differences comprising:a continuously curved rear projection screen, said rear projection screen having a first radius of curvature R1; a viewing axis; a continuously curved Fresnel lens, said Fresnel lens having a second radius of curvature R2 wherein R2 is substantially equal to R1 to enable said Fresnel lens to mounted proximate said rear projection screen, said Fresnel lens having a first segment, said first segment having an incident face and an exit face, said incident face of said first segment forming an angle &Sgr;1 with respect to said viewing axis so that when a first light ray at an angle &bgr;1 to said viewing axis passes through said Fresnel lens the angle of the light ray deflection &OHgr;1 with respect to the first light ray is such that the first light ray exiting said Fresnel lens first segment is parallel to said viewing axis, said Fresnel lens having a second segment, said second segment having an incident face and an exit face, said incident face of said second segment forming an angle &Sgr;2 with respect to said viewing axis so that when a second light ray at an angle &bgr;1 with said angle &bgr;1 different from said angle &bgr;1 passes through said Fresnel lens second segment the angle of the second light ray deflection &OHgr;2 is such that the second light ray exiting said Fresnel lens second segment is parallel to said viewing axis to thereby minimize luminosity differences in an image viewable on said rear projection screen.