Patent attributes
An eye tracker for determining a position of an eye, which may be integrated into a head-mounted display. The eye tracker includes at least one waveguides with an array of grating structures, an array of light sources, a detector, and a controller. The controller activates at least one light source at a time to emit at least one light beam that propagates through the at least one waveguide and couple out via the array of grating structures towards a user's eye. Light signals reflected from the user's eye and skin surfaces are coupled into the at least one waveguide and propagate to the detector that captures the reflected light signals. The controller calculates magnitudes of the reflected light signals to obtain a signature of converted light signals, and determines a position and orientation of the user's eye based on the signature of converted light signals.
