| 摘要 |
<p>The invention seeks to provide a thin projector, such as a rear projector, formed by a less expensive projection optical system which is easy to assemble and install, and performing a highly accurate projection. Projection light PL projected with a projection optical system 25 onto a screen 14 is linearly polarized light having a polarization azimuth along the longitudinal direction of the screen 14. With this arrangement, the right and left ends of the rear surface of the screen 14 maintain a low reflectance, thereby reducing a loss in quantity of illumination light when passing through the screen 14, in other words, achieving high luminance of an image projected onto the screen 14 while maintaining its uniformity of brightness.
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