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US 9,804,389 B2Granted
Apparatus for eye tracking
AssigneeDigiLens Inc.
InventorsMilan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
Life of this patent
Estimating the term…
Abstract
An eye tracker having a waveguide for propagating illumination light towards an eye and propagating image light reflected from at least one surface of an eye, a light source optically coupled to the waveguide, and a detector optically coupled to the waveguide. Disposed in the waveguide is at least one grating lamina for deflecting the illumination light towards the eye along a first waveguide path and deflecting the image light towards the detector along a second waveguide path.
Claims20
An eye tracker comprising:
- a source, a detector;
- and a waveguiding structure comprising a first waveguide containing an input coupler for coupling illumination from said source into a first TIR waveguide path in said first waveguide and a first grating for coupling light out of said first TIR waveguide path onto an eye;
- and a second waveguide containing a second grating for coupling light reflected from at least one surface of eye into a second TIR waveguide path in said second waveguide and an output coupler for coupling light out of said second TIR path onto said detector.
Dependencies are inferred from the claim text.