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PLANAR WAVEGUIDE APPARATUS CONFIGURED TO RETURN LIGHT THERETHROUGH

  • US 20150247976A1
  • Filed: 05/08/2015
  • Published: 09/03/2015
  • Est. Priority Date: 07/12/2013
  • Status: Active Grant
First Claim
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1. A waveguide apparatus, comprising:

  • a planar waveguide having a first end, a second end, a first face, and a second face;

    a diffractive optical element operatively coupled to the planar waveguide; and

    first and second reflectors disposed adjacent the respective first and second ends of the planar waveguide,wherein the first and second ends of the planar waveguide are opposed to each other along a length of the planar waveguide,wherein the first and the second faces of the planar waveguide form an at least partially internally reflective optical path along a portion of the length of the planar waveguide, andwherein the diffractive optical element is configured to interrupt the at least partially internally reflective optical paths to provide a plurality of optical paths between an exterior and an interior of the planar waveguide via the first face thereof at respective positions along a portion of the length of the planar waveguide.

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