| 摘要 |
<p>A red, green and blue light beams from light sources (301, 302, 303) are dimmed, respectively, by light valve units (317, 319, 321) of a light valve (304), and enter a color combiner system (305). The color combiner system (305) comprises three prisms (325, 326, 327) with apical angles of 30 degrees, which are connected through dichroic mirror surfaces (328, 329). Beams of colored light incident on the respective sides of the prisms are combined in the color combiner system (305) and leave from exit side (332) of the prism (327). The optical lengths from the incidence sides to the exit side (332) are substantially the same for all the colors. The combined light is projected through a projection lens (306) onto the screen in a magnified scale. This projection display produces high-quality images while it is small-sized and inexpensive.</p> |
