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System and method to form unpolarized light

  • US 7,649,676 B2
  • Filed: 06/14/2006
  • Issued: 01/19/2010
  • Est. Priority Date: 06/14/2006
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • a source of radiation that produces a linearly polarized beam; and

    an unpolarizing system comprising,a splitter configured to split the linearly polarized beam into first and second portions,first and second optical paths, the first portion of the split beam travels along the first optical path that has a first path length and the second portion of the split beam travels along the second optical path that has a second path length, the second path length being different than the first path length,a combiner configured to combine the first and second portions to form an unpolarized beam, anda rotatable half wave plate located before the splitter configured to tune an intensity of at least one of the first or second portions of the split beam,wherein the tuning produces a uniform intensity of the first and second portions.

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