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Illumination system eliminating laser speckle and projection TV employing the same

  • US 20060109553A1
  • Filed: 11/21/2005
  • Published: 05/25/2006
  • Est. Priority Date: 11/19/2004
  • Status: Active Grant
First Claim
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1. An illumination system comprising:

  • a laser light source including a plurality of lasers which emit laser beams including a plurality of beamlets;

    a first diffractive optical element which separates the laser beams according to wavelength and which focuses the separated beams onto different segments of a second refractive optical element; and

    the second diffractive optical element which focuses and superimposes a plurality of beamlets, of the laser beams transmitted by the first diffractive optical element, in order to spatially average the laser beams and to eliminate laser speckle.

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