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High-efficiency polarized light source

  • US 5,073,830 A
  • Filed: 01/09/1990
  • Issued: 12/17/1991
  • Est. Priority Date: 01/09/1990
  • Status: Expired due to Fees
First Claim
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1. A polarization system consisting of:

  • a light source;

    collimating means for aligning light from said light source into a first beam consisting of substantially parallel light rays;

    first splitting means for splitting said first beam into a first plurality of beams, each of said first plurality of beams having a substantially different wavelength band;

    a plurality of second splitting means for splitting said first plurality of beams into a second and third plurality of beams, said second and third pluralities of beams having substantially perpendicular polarization states;

    a plurality of retarding means for changing the polarization of said second plurality of beams such that said second and third pluralities of beams consist of substantially parallel polarization states;

    a plurality of linearly aligned reflecting means for aligning said second and third plurality of beams to be substantially parallel;

    recombining means for combining said second plurality of beams into a single second beam and said third plurality of beams into a single third beam, said second beam and said third beam oriented in a substantially parallel manner; and

    imaging means for focusing said second and third beams, thereby creating an image with substantially a single polarization, said image being suitable for input to an optical system requiring polarized light.

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