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Optical device for semiconductor based lamp

  • US 8,390,017 B2
  • Filed: 04/18/2012
  • Issued: 03/05/2013
  • Est. Priority Date: 07/15/2010
  • Status: Active Grant
First Claim
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1. An optical device for a semiconductor based lamp, the optical device comprising:

  • a base;

    a semiconductor based light-emitting device mounted on the base;

    a transparent body encapsulating the semiconductor based light-emitting device; and

    a reflective surface in contact with the transparent body and covering a predetermined region on a top surface of the transparent body, the reflective surface having an opening in a portion of the reflective surface parallel to the base;

    wherein at least a portion of the transparent body protrudes through the opening in the reflective surface;

    wherein light emitted from the semiconductor based light-emitting device transmits upwardly through the opening in the reflective surface.

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