| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable a projector, which decreases in contrast as the lightness is increased and needs to have the lightness decreased to increase the contrast, to have both lightness and a high contrast. <P>SOLUTION: The angle of divergence of light made incident on a polarization beam splitter on the plane containing the incidence direction and reflection direction of a main light beam to and from the polarization beam splitter is made narrower than the angle of divergence of light irradiating a polarization beam splitter on a plane perpendicular to the above plane containing the main light beam. <P>COPYRIGHT: (C)2004,JPO |
