Projektor mit elektro-optischem Modulator und Prisma

摘要

The present invention seeks to reduce the size of a projector (1000) of the type which uses an optical modulator (200) that modulates light by controlling the emitting direction of light applied to a light illumination surface (202) in accordance with image information. A prism (300) has a selective reflection/transmission surface which reflects illumination light emitted from an illumination optical system (100) and impinging upon it and causes it to impinge upon the light illumination surface (202) of an optical modulator (200) at a predetermined angle and which allows the modulated light emitted from the optical modulator to be transmitted therethrough and emits it to the projection optical system (400). The selective reflection/transmission surface formed such that when the optical path of the illumination light is projected onto a plane parallel to the light illumination surface, the inclination of the central axis (100ax) of the illumination light emitted from the illumination optical system (100) and impinging upon the selective reflection/transmission surface (202) is different from the inclination of the central axis (200ax) of the illumination light reflected by the selective reflection/transmission surface (202) and impinging upon the light illumination surface.