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Apparatus for controlling the re-distribution of light emitted from a light-emitting diode

  • US 9,322,515 B2
  • Filed: 06/29/2011
  • Issued: 04/26/2016
  • Est. Priority Date: 06/29/2011
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • a source configured to emit electromagnetic radiation having a first angular distribution pattern;

    an optical element coupled to the source, wherein the optical element comprises a bulk material, a first type of particle substantially uniformly distributed throughout the bulk material, and a second type of particle substantially uniformly distributed throughout the bulk material, wherein the first type of particle has a first concentration by weight within the bulk material, and the second type of particle has a second concentration by weight within the bulk material, and further wherein the optical element has a shape that captures the first angular distribution pattern and emits a second angular distribution pattern;

    wherein the first and second angular distribution patterns provide a light distribution pattern with a light distribution uniformity between 0.6 and 1.4, the light distribution uniformity is given by;

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