Patent ID: 6335838
Filing Date: 2002-01-01
Classification: G02B,G02F

Abstract:
An image display apparatus used in front of an observer's eye, comprising:a reflection-type modulation device for modulating illumination light incident thereon in accordance with an image displayed thereon and reflecting back the thus modulated illumination light as image light; a semi-transmissive reflection device for directing the illumination light to the reflection-type modulation device and letting the image light reflected back from the reflection-type modulation device emerge in a direction that is not parallel to a direction from which the semi-transmissive reflection device receives the illumination light, the semi-transmissive reflection device having at least one surface with an optical power; an observation optical system for directing the image light to the observer's eye so that a virtual image of the image displayed on the reflection-type modulation device will be presented to the observer; and a separation device disposed in an optical path of the image light between the reflection-type modulation device and the observer so as to separate light other than the image light from light directed to the observer's eye, wherein the observation optical system includes a reflecting surface having an optical power.