| 摘要 |
While illuminating light is separated into a first wavelength component illuminating light and second and third wavelength component illuminating lights by a dichroic mirror, the first illuminating light is reflected off a first liquid crystal display element to form a first wavelength component image light which is then reflected off or passed through the polarizing surface of a first polarizing beam splitter, whereas one of the second and third wavelength component illuminating lights has its polarizing surface 90°-converted by a ½ phase difference plate, the other one is passed through the plate without having its polarizing surface converted, the second and third wavelength components are separated from each other by a second polarizing beam splitter and respectively reflected off second and third liquid crystal display elements to obtain second and third wavelength component image lights that are again synthesized, then three wavelength component image lights are synthesized by a dichroic prism, the polarizing surfaces of the first and second polarizing beam splitters used reflect an s polarization light and transmit a p polarization light, and the dichroic prism transmits the second wavelength component image light at a p polarization light and first and third wavelength component image lights at an s polarization light.
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