Scanning near-eye imaging and sensing system
AssigneeMeta Platforms Technologies, LLC
InventorsMohamed Tarek Ahmed El-Haddad, Yang Yang, Francesco Larocca, Robin Sharma
Life of this patent
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Abstract
A near-eye imaging system includes a light source, a waveguide, a scanner, and a sensor. The light source is configured to emit light. The waveguide includes an output coupler. The scanner is configured to direct the light to the output coupler at varying scan angles. The waveguide confines the light to guide the light to the output coupler. The output coupler has negative optical power and is configured to direct the light to exit the waveguide as expanding illumination light toward an eyebox region. The sensor is configured to generate a tracking signal in response to returning light incident on the sensor via the scanner and via the output coupler.
Claims20
A near-eye imaging system comprising:
- a light source configured to emit light;
- a waveguide including an output coupler;
- a scanner configured to direct the light to the output coupler at varying scan angles, wherein the waveguide confines the light to guide the light to the output coupler, and wherein the output coupler has negative optical power and is configured to direct the light to exit the waveguide as expanding illumination light toward an eyebox region;
- and
- a sensor configured to generate a tracking signal in response to returning light incident on the sensor via the scanner and via the output coupler.
A head mounted device comprising:
- a light source configured to emit near-infrared light;
- a waveguide including an output coupler;
- a scanner configured to direct the near-infrared light to the output coupler, wherein the waveguide confines the near-infrared light to guide the near-infrared light to the output coupler;
- and
- a sensor configured to generate a tracking signal in response to returning near-infrared light incident on the sensor via the scanner, wherein the output coupler is configured to focus the returning near-infrared light to an image plane of the sensor.
Dependencies are inferred from the claim text.