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High-efficiency illumination device and image projection apparatus comprising such a device

  • US 5,601,351 A
  • Filed: 06/01/1995
  • Issued: 02/11/1997
  • Est. Priority Date: 06/01/1994
  • Status: Expired due to Fees
First Claim
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1. An illumination device for supplying a beam of linearly polarized light having a non-rotationally symmertrical beam cross-section at a location of an object to be illuminated, said device comprising:

  • a light source;

    a reflector;

    an optical integrator for forming the beam cross-section and for realising a uniform light distribution across the beam cross-section; and

    a polarizing system for converting light supplied by said light source into linearly polarized light, wherein said polarizing system is arranged in a radiation path between said light source and said optical integrator.

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