| 摘要 |
An optical system for presenting a visual display includes a light source, a polarity-reversing polarizer-analyzer beam splitting cube, and a viewing area that receives light of a first polarity from the light source. The first polarity light contains image information. The cube has a plurality of external surfaces and a bleed through polarity-reversing beam splitting film that selectively passes the first polarity light and converts the passed first polarity light (e.g., S-polarized light) to light of a second polarity (e.g., P-polarized light). The viewing area receives the first polarity light from one of the external surfaces of the cube. In one embodiment, the optical system includes an auxiliary analyzer for blocking the second polarity light from reaching the viewing area. The polarity-reversing film passes through the first polarity light, reflects second polarity light which strikes the film at a specific angle, passes through second polarity light which strikes the film at an angle other than the specific angle, and converts the passed through second polarity light to first polarity light.
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