Patent ID: 6331916
Filing Date: 2001-12-18
Classification: G02B

Abstract:
A virtual image optical system comprising:a reflective spatial light modulator;an illuminating light source device for providing said reflective spatial light modulator with an illuminating ray;a light source optical system for leading an illuminating ray fed from said illuminating light source device to said reflective spatial light modulator, said light source optical system including a beam splitter; andeyepiece optics for leading an image ray fed from said reflective spatial light modulator to a viewing area, said eyepiece optics including a beam splitter and a reflector,wherein an angle formed by a plane normal vector at a point where a chief ray passing through a center of said reflective spatial light modulator intersects the beam splitter of said eyepiece optics and a plane normal vector at a point where the chief ray intersects said reflector is in the range of 136 degrees to 179 degrees, when a side of ray reflection on each surface of the beam splitter and the reflector of said eyepiece optics is taken as a positive direction of a vector.