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US 11,994,674 B2Granted
Apparatus for eye tracking
AssigneeDigiLens Inc.
InventorsMilan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
Life of this patent
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Abstract
An eye tracker comprises a light source; a detector; and first and second waveguides. The first waveguide comprises an input coupler for coupling source light into a waveguide path and a first grating for coupling light out of the waveguide path onto an eye. The second waveguide comprises a second grating for coupling light reflected from the eye into a waveguide path and an output coupler for coupling light out of the waveguide path onto the detector. The second grating is optically configured for imaging the eye onto the detector.
Claims20
An eye tracker comprising:
- a light source;
- a detector;
- a waveguide, wherein the waveguide comprises:
- an input coupler configured to in-couple light from the light source into a first optical path inside the waveguide;
- an illumination grating configured to output light from the light source onto an eye;
- an imaging grating configured to input light reflected off the eye into a second optical path inside the waveguide;
- an output coupler configured to output the reflected light into the detector.
4 more elements
Dependencies are inferred from the claim text.