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Lighting fixture having an optical wave guide and a descartes lens or descartes reflector

  • US 9,285,526 B2
  • Filed: 10/06/2010
  • Issued: 03/15/2016
  • Est. Priority Date: 10/09/2009
  • Status: Expired due to Fees
First Claim
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1. A light guiding structure comprising:

  • a light source that outputs a light;

    a light guiding element optically connected to the light source;

    an optical element coupled to the light guiding element,wherein a surface of the optical element remote from the light guiding element has a shape of a section of a rotational ellipsoid,wherein a geometric cutting plane of the section extends approximately at right angles to a longitudinal axis of the rotational ellipsoid,wherein the light guiding element is approximately rod-shaped and has a light admitting aperture optically connected to the light source and a light emitting aperture coupled to the optical element,wherein the optical element has a hemispherical section facing the light guiding element; and

    a reflector at least partially encompasses the hemispherical section,wherein a section of the surface of the optical element is mirrored to reflect substantially all of the light from the light source towards the reflector.

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