Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Jani Kari Tapio Tervo0
Petri Antero Stenberg0
Date of Patent
February 5, 2019
0Patent Application Number
151370670
Date Filed
April 25, 2016
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A waveguide configured for use with a near-eye display (NED) device can include a light-transmissive substrate configured to propagate light rays through total internal reflection and a diffractive optical element (DOE) on a surface of the substrate that is configured to input and/or output light rays to and/or from the substrate. According to some embodiments the DOE can include a diffraction grating made of first material having a first refractive index and a coating of a second material over the diffraction grating, the second material having a second refractive index that is not equal to the first refractive index.
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