Google patents waveguide design to make AR glasses look even
This filing describes a light guide component for augmented reality displays that uses a series of reflective facets. The intensity of these facets changes based on their position to ensure the light coming out is uniform across the viewer's eye.
In the filing’s own words
Described techniques provide increased output uniformity in an eyebox of a reflective light guide using a reflective structure, such as a periodic reflective structure formed in one or more optical substrates of an optical combiner. The reflective structure includes a series of reflective facets having a respective reflective intensity that varies in accordance with a position of the respective facet along a path of propagation for the light guide, such as to increased reflective intensity for reflective facets positioned further from an incoupling structure of the light guide.
What exactly they claim (claim 1)
1. A light guide, comprising: an incoupling structure to receive display light and to direct the display light into the light guide along a propagation path; and a reflective structure to outcouple at least a portion of the display light toward an eyebox of the light guide, the reflective structure comprising a series of reflective facets having a respective reflective intensity that varies in accordance with a position of the respective facet along the propagation path.
Facts
- Company
- Google (GOOGLE LLC)
- Official title
- VARIABLE DEPTH BLAZED WAVEGUIDE
- Publication number
- US20260276992A1
- Application number
- 19156970
- Filed
- Feb 15, 2023
- Published
- Sep 17, 2026
- Inventors
- 3
- Claims
- 22
Classified under
G02B 27/0172 Physics & computingG02B 5/1828 Physics & computingG02B 2027/0125 Physics & computingG02B 2027/0178 Physics & computingMore from Google in AR, VR & displays
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.