The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2024
Filed:
Jul. 24, 2019
Snap Inc., Santa Monica, CA (US);
Ciaran Phelan, Abingdon, GB;
Sophia Antonia Fox, Abingdon, GB;
Mohmed Salim Valera, Abingdon, GB;
Arseny Alexeev, Abingdon, GB;
Snap Inc., Santa Monica, CA (US);
Abstract
An optical structure is disclosed for use in an augmented reality display. The structure includes a waveguide () and an input diffractive optical structure () configured to receive light from a projector and couple the received light into the waveguide (). An output diffractive optical structure () is configured to receive light from the input diffractive optical element () in an input direction, wherein the output diffractive optical structure comprises at least a first diffractive optical element () and a second diffractive optical element () with different respective diffraction efficiencies, wherein the first diffractive optical element has a relatively high diffraction efficiency and the second diffractive optical element has a relatively low diffraction efficiency and the first and second diffractive optical elements are overlaid on one another in or on the waveguide. The output diffractive optical structure () comprises a first portion () and a second portion (). In the first portion () the first diffractive optical element is configured to couple light from the input direction towards the second portion () and the second diffractive optical element is configured to couple light from the input direction away from the second portion. In the second portion () the first diffractive optical element is configured to couple light from the input direction towards the first portion () and the second diffractive optical element is configured to couple light from the input direction away from the first portion ().