Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hee Yoon Lee0
Date of Patent
April 27, 2021
Patent Application Number
16733053
Date Filed
January 2, 2020
Patent Citations Received
Patent Primary Examiner
Patent abstract
An optical waveguide is disclosed. The optical waveguide includes a plate of transparent material comprising opposed first and second surfaces for guiding an optical beam between the surfaces by at least one of reflection or diffraction. A diffraction grating is disposed at the first surface for spreading the optical beam by diffracting portions thereof into a non-zero diffraction order to propagate inside the plate. The first diffraction grating includes an array of parallel grooves structured to provide a spatial variation of optical phase of the portions of the optical beam diffracted by the first diffraction grating into the non-zero diffraction order.
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