Patent ID: 7862180
Filing Date: 2011-01-04
Classification: G03B,H04N

Abstract:
1. An optical system for image projection comprising: a lighting optical system leading light from a light source for lighting a display element; and a projecting optical system for projecting projection light containing image information from the display element, said projecting optical system being a L-type projecting optical system turning and emitting the projection light incident thereto, wherein a straight optical axis from the light source in the lighting optical system is positioned in an area deviated from a luminous flux of the projection light incident into the projecting optical system toward an area where the projection light emitted from the projecting optical system passes, and direction of the straight optical axis is perpendicular to a plane comprising an optical axis of the projection light incident into the L-type projecting optical system and an optical axis of the projection light emitting from the L-type projecting optical system.