| 摘要 |
<p>Light projection apparatus (1) has a source of unpolarised light (2). The light passes to first polarising means (3) which converts substantially all of the light incident on the polarising means (3) from the source into polarised light. The first polarising means (3) is preferably a polarising cube beam splitter (5). The light passes to image means (4), which preferably includes a liquid crystal cell (17), for generating an image to be projected. A second polarising means such as a polarising cube beam splitter (26) is provided optically after the image means (4) for receiving light passing through the image means (4) and passing a first beam having a first planar polarisation and deflecting a second beam having a second planar polarisation, at least one of the first and second beams providing a projected image.</p> |
