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DIFFRACTIVE OPTICAL ELEMENTS WITH GRADED EDGES

  • US 20170003504A1
  • Filed: 06/30/2015
  • Published: 01/05/2017
  • Est. Priority Date: 06/30/2015
  • Status: Active Grant
First Claim
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1. An optical system, comprising:

  • a substrate of optical material;

    a first diffractive optical element (DOE) disposed on the substrate and configured as an in-coupling grating to receive, as an input, one or more optical beams that propagate in the first DOE and exit at a trailing edge of the first DOE; and

    a second DOE disposed on the substrate and configured for pupil expansion of the one or more optical beams along a first direction,in which the trailing edge of the first DOE is located on the substrate at an interface with the second DOE, wherein the one or more optical beams exiting at the trailing edge, enter a leading edge of the second DOE, andwherein the trailing edge and leading edge are graded so that a grating height of each of the first DOE and the second DOE increases as a function of distance from the interface.

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