Patent ID: 6315415
Filing Date: 2001-11-13
Classification: G02B,G03B

Abstract:
An image projector comprising:an illumination optical system for emitting illumination light;a reflection-type display panel for being illuminated by the illumination light, the reflection-type display panel being divided into a plurality of pixels, the reflection-type display panel being for reflecting incoming illumination light selectively in accordance with a pattern formed by the plurality of pixels thereby producing projection light;a projection optical system for transmitting the projection light so as to project the pattern formed by the plurality of pixels onto a projection plane to thereby form a projected image, the projection optical system comprising, from a projected-image side, a front lens unit, an aperture stop, and a rear lens unit; andlight-introducing means being disposed between the front and rear lens units of the projection optical system, for directing the illumination light emitted from the illumination optical system to the reflection-type display panel,wherein the projection optical system fulfills the following condition:0.2.ltoreq..gamma.F.ltoreq.0.8where.gamma.F represents either an angular magnification of the front lens unit if the front lens unit is an afocal optical system, or a ratio of an angle at which paraxial off-axial rays that pass through the aperture stop enter the front lens unit to an angle at which the rays emerge from the front lens unit if the front lens unit is not an afocal optical system.