Patent ID: 9737209
Date: 2017-08-22
CPC Classifications: A61B,G01N,G02B,G02F,G06F,G06K

Claim:
1. An eye tracking and gaze fixation detection system, comprising: an electronically scannable optical illumination system arranged to emit polarized near-infrared (NIR) light to at least a portion of a retina in an eye of a subject; an optical detection system arranged in an optical path of said NIR light after being reflected from the retina of the eye of the subject, said optical detection system providing a detection signal; and a signal processing system configured to communicate with the optical detection system to receive said detection signal, wherein the optical illumination system is configured to emit the polarized NIR light to illuminate at least a portion of a scanning path, wherein said scanning path is a spatially closed loop across a portion of said retina in said eye of said subject that repeats periodically over time, and wherein the signal processing system is configured to determine at least one of a gaze direction and a gaze fixation based on the detection signal.