Patent ID: 8955977
Filing Date: 2015-02-17
Classification: G02B,G03B,H04N

Abstract:
1. A projection-type image display apparatus comprising: a color separation element including a color separation surface configured to separate an incident light into a plurality of lights with wavelength bands different from each other; a light modulation element configured to receive the light separated by the color separation element; a polarizing beam splitter disposed between the color separation element and a projection optical system to guide an illumination light output from a light source to the color separation element and guide a combined image light exited from the color separation element to the projection optical system according to a polarization direction; and a phase difference plate disposed between the color separation element and the light modulation element, wherein, an optic axis of the phase difference plate and a normal of the color separation surface are substantially parallel or perpendicular to each other, in a cross section parallel to the normal of the color separation surface and a normal of the light modulation element.