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INCREASING THE ANGULAR RANGE OF LIGHT COLLECTION IN SOLAR COLLECTORS/CONCENTRATORS

  • US 20100180946A1
  • Filed: 09/17/2009
  • Published: 07/22/2010
  • Est. Priority Date: 09/18/2008
  • Status: Abandoned Application
First Claim
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1. A light collecting device comprising:

  • a light guide having top and bottom surfaces, said light guide guiding light therein by multiple total internal reflections at said top and bottom surfaces;

    a plurality of diffractive features disposed to receive light at a first angle with respect to the normal to the top surface of said light guide; and

    a plurality of prismatic features disposed rearward of the plurality of diffractive features,wherein said diffractive features are configured to redirect said light at a second angle towards the plurality of prismatic features,wherein said second angle is more normal than the first angle, andwherein said plurality of prismatic features are configured to turn the light redirected by the diffractive features such that said light is guided in the light guide by total internal reflection from said top and bottom surfaces of the light guide.

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