Patent ID: 6891652
Filing Date: 2005-05-10
Classification: H04N

Abstract:
1. An optical modulator that modulates a light beam irradiated by a light source in accordance with image information, comprising: an optical modulator body having a pair of transparent substrates between which an electrooptic material is sealed; a dust-proof glass that is closely attached on an outer surface of at least one of the pair of substrates to prevent adhesion of dust on the outer surface of the one of the substrate; a holding frame having an accommodation portion that accommodates the optical modulator body and a fixing plate that presses and holds the optical modulator body within the accommodating portion; a frame member made of a heat-conductive material and provided on an outer periphery of a one of the pair of substrates disposed on the side of the fixing plate, the frame member being in contact with the accommodating portion and/or the fixing plate; and the outer diameter of the dust-proof glass being smaller than the outer diameter of the one of the substrate.