APPARATUS FOR EYE TRACKING
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Accused Products
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.
58 Citations
40 Claims
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1-20. -20. (canceled)
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21. An eye tracker comprising:
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a light source; a detector; a first waveguide comprising an input coupler for coupling illumination from said source into a TIR waveguide path in said first waveguide and a first grating for coupling light out of said TIR waveguide path onto an eye; and a second waveguide comprising a second grating for coupling light reflected from said eye into a TIR waveguide path in said second waveguide and an output coupler for coupling light out of said TIR path onto said detector, wherein said second grating is optically configured for forming an image of said eye on said detector. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification