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Planar waveguide apparatus with diffraction element(s) and system employing same

  • US 9,612,403 B2
  • Filed: 04/24/2015
  • Issued: 04/04/2017
  • Est. Priority Date: 06/11/2013
  • Status: Active Grant
First Claim
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1. A waveguide array apparatus, comprising:

  • a plurality of planar waveguides, includinga first planar waveguide of the plurality having a first end, a second end, a first face, and a second face, the first end of the first planar waveguide opposed to the second end of the first planar waveguide along a length of the first planar waveguide, at least the first and the second faces of the first planar waveguide forming a first at least partially internally reflective optical path along at least a portion of the length of the first planar waveguide, anda second planar waveguide of the plurality having a first end, a second end, a first face, and a second face, the first end of the second planar waveguide opposed to the second end of the second planar waveguide along a length of the second planar waveguide, at least the first and the second faces of the second planar waveguide forming a second at least partially internally reflective optical path along at least a portion of the length of the second planar waveguide,wherein the second face of the first planar waveguide is disposed adjacent to the first face of the second planar waveguide;

    a first reflector disposed adjacent respective first ends of the first and second planar waveguides; and

    a second reflector disposed adjacent respective second ends of the first and second planar waveguides,wherein each of the first and second planar waveguides has a respective diffractive optical element[s] disposed between the respective first and second ends at respective positions along at least a portion of the length of the respective first and second planar waveguides to reflect a respective portion of a respective spherical wave front outwardly from the first face of the respective first and second planar waveguides.

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