Patent ID: 8702240
Filing Date: 2014-04-22
Classification: G02B,G03B,H04N

Abstract:
1. An image display apparatus comprising: an image display element configured to display an image by controlling a polarization state of a polarized light beam; an illumination optical system configured to guide the polarized light beam towards the image display element; a polarizing beam splitter including a polarization splitting film, which is disposed between the illumination optical system and the image display element and which selectively splits incident light by reflecting S-polarized light and transmitting P-polarized light therethrough; and a mounting portion to which is mounted a projection optical system configured to project the image displayed by the image display element onto a projection plane, wherein the mounting portion of the projection optical system is arranged in a section parallel to both a line normal to the polarization splitting film and a line normal to the image display element such that an angle, which is formed by the polarization splitting film and an optical path of a light beam emerging from a center of the image display element and reaching a point where an optical axis of the projection optical system intersects an optical surface of the projection optical system closest to the image display element, is smaller than 45°, wherein the optical path of the light beam emerging from the center of the image display element and reaching the point where the optical axis of the projection optical system intersects the optical surface of the projection optical system closest to the image display element does not overlap an optical path of a light beam passing on the optical axis of the illumination optical system and entering the image display element on the section parallel to the line normal to the polarization splitting film and the line normal to the image display element.