Patent ID: 6457828
Filing Date: 2002-10-01
Classification: H04N

Abstract:
A display optical apparatus comprising.an illumination optical system, including a color separation device, for separating light polarized in a predetermined polarization direction into light of different wavelength ranges traveling in different directions by use of the color separation device and emitting the thus separated light as illumination light; a reflection-type light modulation device for displaying an optical image; an illumination/projection separation optical system for directing the illumination light emitted from the illumination optical system to the reflection-type light modulation device and for emitting light reflected from the reflection-type light modulation device as projection light; a microcylinderlens array, disposed between the color separation device and the reflection-type light modulation device, for focusing the illumination light on the reflection-type light modulation device in such a way that light of different wavelength ranges is focused separately; and a projection optical system for focusing the projection light emitted from the illumination/projection separation optical system on an image plane, wherein a plane including a central ray of the illumination light and a central ray of the projection light is substantially perpendicular to a plane including a direction in which the color separation device performs color separation.