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LIGHT COLLECTION AND ILLUMINATION SYSTEMS EMPLOYING PLANAR WAVEGUIDE

  • US 20100278480A1
  • Filed: 04/21/2010
  • Published: 11/04/2010
  • Est. Priority Date: 04/21/2009
  • Status: Active Grant
First Claim
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1. An apparatus for light collimation and distribution, comprising:

  • a planar waveguide having an optically transparent planar material having edges disposed between a first planar surface and a second planar surface;

    said planar waveguide is configured to receive light on one edge of said planar material, and to propagate the received light through said planar waveguide in response to optical transmission and total internal reflection;

    a plurality of light collimating elements within a collimating array which is disposed in an optical receiving relationship with a planar surface of said planar waveguide; and

    a plurality of light deflecting elements optically coupled to said waveguide and configured for deflecting light propagating through said planar waveguide at a sufficiently low angle, below the predetermined critical angle for total internal reflection (TIR), with respect to a surface normal direction of an exterior surface of said planar waveguide to exit said planar waveguide and enter said collimating array;

    wherein each of said plurality of light deflecting elements is in a predetermined alignment with each of said plurality of light collimating elements; and

    wherein light received on the edge of said planar waveguide is angularly redirected, collimated, and distributed from the surface of said collimating array which is optically coupled to said planar waveguide.

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