| 摘要 |
An illumination device for supplying a beam of linearly polarized light having a non-rotationally symmetrical cross-section at the location of an object to be illuminated is described, which device comprises a light source, a reflector, an optical integrator (54, 82) for forming said beam cross-section and for realizing a uniform light distribution across the beam cross-section, and a polarizing system for converting the light supplied by the source into linearly polarized light. Since the polarizing system is arranged in the radiation path in front of the optical integrator, the device can be implemented with a small number of components and in a compact manner. The device may be used to great advantage in an image projection apparatus.
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