| 摘要 |
A compact optical polarization converter (10) for a liquid crystal light valve projector includes a beam splitting prism (12) with a first coated surface (26) made of alternating layers of a first and second material. An input beam of light (43) is incident upon the first coated surface, at Brewster's angle for the first and second materials, which transmits a first beam having a first polarization along a first path (44) and reflects a second beam having a second polarization along a second path (45), towards a second surface (24). The second surface reflects the second beam such that it is displaced from, and approximately parallel to, the first path. A beam steering prism (32) refracts the first beam. A retarding device (34) rotates the first beam from the first polarization state to the second polarization state. A displacing prism (38) translates the beams closer together.
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