Patent ID: 6776489
Filing Date: 2004-08-17
Classification: H04N

Abstract:
A color separation/combination optical system which separates illumination light from a light source into light components for a plurality of colors, guides the light components to a plurality of image display elements for respective colors, and combines the light components modulated by said image display elements comprising:a polarization beam splitter which has a non-incident/non-emergent surface that is a surface other than a light-incident surface and light-emergent surface, a plurality of temperature controlling members, each of which is disposed on the side of the non-incident/non-emergent surface of said polarization beam splitter and controls the temperature of said polarization beam splitter; a temperature sensor which detects the temperature of said polarization beam splitter; and a control device which controls at least one of said plurality of temperature controlling members based on the temperature detected by said temperature sensor.