| 摘要 |
<p>In a polarized light illumination apparatus 1, randomly polarized light rays emitted from first and second light sources 101 and 102 are respectively separated by a polarized light separating optical element 201 into two different types of polarized light rays thereby producing three types of polarized light rays which are polarized in directions perpendicular to one another. The polarized light rays are partially returned to the light sources and their polarization directions are rotated. Secondary light source images are formed at locations shifted in an x direction whereby polarization is aligned in the same single direction. Thus, even though a plurality of light sources are used, the polarized light illumination apparatus can emit illumination light using both polarized components without causing an increase in the illumination angle. Furthermore, a projection type display device capable of projecting an image with a very high brightness can be realized. <IMAGE></p> |
