| 摘要 |
<p>A projection system with improved contrast comprises a light source (4) for emitting a bundle of light, a spatial light modulator (54) for modulating light emitted from the light source, and aperture stop means (88) arranged between the light source and the modulating device for limiting the bundle of light to be incident on the spatial light modulator. The aperture stop means comprises an optical component making use of refraction and internal reflection, such as for example a prism. Such optical component can easily be used in environments subject to high temperatures, and in environments where the optical component has to withstand large amounts of infrared and ultraviolet radiation.</p> |
