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Laser projector with reduced speckle

  • US 9,482,877 B2
  • Filed: 04/12/2011
  • Issued: 11/01/2016
  • Est. Priority Date: 04/12/2011
  • Status: Active Grant
First Claim
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1. A light source apparatus for use with a projector having a light modulator for receiving a plurality of light beams and for projecting the light beams towards a display, comprising:

  • a laser light source with multiple wavelengths for at least one primary color arranged to output a laser light beam;

    an integrator assembly comprising;

    a first integrator and a second integrator; and

    a first light diffusing element, positioned in between said first integrator and said second integrator, wherein the first light diffusing element is arranged to receive a laser light and forward a plurality of light beams at a range of angles,the integrator assembly being adapted such that for each of the wavelengths;

    a substantially uniform brightness is achieved across the surface of an image modulator andat each point of the surface of the image modulator a substantially uniform filling of the available angular space is achieved.

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