| 摘要 |
A liquid crystal projection system ( 70 ) includes a light source ( 50 ) for emitting a white light beam of three primary colors, a polarizer ( 51 ) for polarizing the white light beam, a separating mirror ( 52 ), first and second reflecting mirrors ( 53, 54 ), first and second polarization separators ( 56, 57 ), a half-wave plate ( 55 ), a color separator ( 58 ), an image modulation device ( 60 R, 60 G, 60 B) and a projection lens ( 59 ). The first polarization separator, the second polarization separator and the color separator are combined together as a unit. The half-wave plate is positioned between the first and second polarization separators. The image modulation device is arranged on sides of the first polarization separator and the color separator. The projection lens is disposed on one side of the second polarization separator. Both monochromatic and bichromatic light beams from the separating mirror are respectively incident into the first and second polarization separators in an S-polarization state.
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