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Projection illumination system with tunnel integrator and field lens

  • US 6,857,752 B2
  • Filed: 04/11/2003
  • Issued: 02/22/2005
  • Est. Priority Date: 04/11/2003
  • Status: Expired due to Fees
First Claim
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1. An illumination system, comprising:

  • a light source producing illumination light;

    a tunnel integrator disposed to homogenize the illumination light, the tunnel integrator having an input end and an output end;

    a tunnel integrator field lens disposed proximate the output end of the tunnel integrator;

    at least one imager disposed to receive the illumination light;

    a relay lens system disposed between the tunnel integrator field lens and the at least one imager to relay the illumination light from the tunnel integrator to the at least one imager, the relay lens system comprising at least a first relay lens; and

    a first aperture stop disposed between the first relay lens and the at least one imager.

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