| 摘要 |
<p>An optical system (10) for a full color liquid crystal light valve image projector is provided. The invention includes a first prepolarizer (20) for separating from a first beam light of first and second colors and a first polarization state and a second prepolarizer (22) for separating from the first beam light of a third color and a second polarization state. The resultant first beam contains light of a third color and first polarization state and light of first and second colors and second polarization state. A polarization selective beamsplitter (24) is provided in the optical path of the first beam for transmitting, in a second beam, light in the first beam having the first polarization state and reflecting, in a third beam, light in the first beam having the second polarization state. A color selective beamsplitter (32) is included for transmitting, in a fourth beam, light in the third beam having a first color and for reflecting, in a fifth beam, light in the third beam having a second color. In the illustrative embodiments, the invention includes first and second reflective surfaces (26 and 36) for reflecting the second and fifth beam respectively into a parallel coplanar relationship.</p> |
