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WAVEGUIDES WITH EMBEDDED COMPONENTS TO IMPROVE INTENSITY DISTRIBUTIONS

  • US 20170131551A1
  • Filed: 11/10/2015
  • Published: 05/11/2017
  • Est. Priority Date: 11/10/2015
  • Status: Active Grant
First Claim
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1. An apparatus for use in replicating an image associated with an input-pupil to an output-pupil, the apparatus comprising:

  • a planar optical waveguide including a bulk-substrate, and also including an input-coupler, an intermediate-component and an output-coupler;

    the input-coupler configured to couple light corresponding to the image associated with the input-pupil into the bulk-substrate of the waveguide and towards the intermediate-component;

    the intermediate-component configured to perform one of horizontal or vertical pupil expansion and to direct the light corresponding to the image towards the output-coupler;

    the output-coupler configured to perform the other one of horizontal or vertical pupil expansion and to couple the light corresponding to the image, which travels in the planar optical waveguide from the input-coupler to the output-coupler, out of the waveguide so that the light is output and imaged from the output-pupil;

    the bulk-substrate including a first major planar surface and a second major planar surface opposite and parallel to the first major planar surface; and

    a switchable liquid crystal (LC) layer, embedded between the first and second major planar surfaces, configured to cause light that is output by the output-coupler to have a more uniform intensity distribution compared to if the switchable LC layer were absent.

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