Freestone Intellectual Property Law PLLC
Infrared light suppression in eye-tracking imaging
A near-eye optical element, according to aspects herein, includes an illumination layer, an optical combiner layer, and an infrared absorber layer. The illumination layer includes infrared light sources configured to direct narrow-band infrared illumination light to an eyeward side of the near-eye optical element for eye tracking. The optical combiner layer is configured to receive reflected infrared light of the narrow-band infrared illumination light that is reflected off an eye of a user and to direct the reflected infrared light to a camera to generate an eye-tracking image. The infrared absorber layer is disposed between the optical combiner layer and a backside of the near-eye optical element to absorb infrared interference light of the narrow-band.
Facebook Technologies, LLC
G H G G G H G G G G G
G02B H04N G02B G02B G02B H04N G02B G02B G06F G02B G02B
inventional inventional additional inventional additional inventional inventional inventional inventional additional additional
Karol Constantine Alexander Randon Qi
Hatzilias Cope Zhang