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Input coupling

  • US 10,509,153 B2
  • Filed: 11/29/2017
  • Issued: 12/17/2019
  • Est. Priority Date: 11/29/2016
  • Status: Active Grant
First Claim
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1. An optical device comprising:

  • a total internal reflection (TIR) waveguide having a first substrate with opposing first and second surfaces and having a second substrate with opposing first and second surfaces; and

    a grating medium in the TIR waveguide and interposed between the second surface of the first substrate and the first surface of the second substrate, wherein the grating medium comprises an output coupling device configured to couple light out of the TIR waveguide, wherein the output coupling device comprises at least one diffractive grating, and wherein the first substrate comprises an input coupling face that extends at a non-perpendicular angle from the first surface of the first substrate to the second surface of the first substrate, the input coupling face being configured to couple, via transmission, image light into the TIR waveguide.

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