| 摘要 |
Liquid crystal modulation elements 925R, 925G and 925B are arranged so that light outgoing surfaces 9252R, 9252G and 9252B thereof face light incident surfaces 911R, 911G and 911b of a color synthesizing prism 910. Transparent plates 970R, 970G and 970B are bonded to the light outgoing surfaces 9252R, 9252G and 9252B of the liquid crystal modulation elements 925R, 925G, and 925B. For this reason, adhesion of dust to the light outgoing surfaces 9252R, 9252G and 9252B of the liquid crystal modulation elements 925R, 925G and 925B can be prevented. Further, it is possible to prevent light reflection at the interface surface between the light outgoing surfaces 9252R, 9252G and 9252B and air due to the difference in refractive index therebetween. This allows a high-quality image to be projected without deteriorating the switching characteristic of the liquid crystal modulation elements 925R, 925G and 925B while preventing dirt from adhering to the light outgoing surfaces 9252R, 9252G and 9252B of the liquid crystal modulation elements 925R, 925G and 925B.
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