US Patent Application 18297372. PASSIVE WORLD-REFERENCED EYE TRACKING FOR SMARTGLASSES simplified abstract
Contents
PASSIVE WORLD-REFERENCED EYE TRACKING FOR SMARTGLASSES
Organization Name
Inventor(s)
Daniel Adema of Kitchener (CA)
Timothy Paul Bodiya of Waterloo (CA)
PASSIVE WORLD-REFERENCED EYE TRACKING FOR SMARTGLASSES - A simplified explanation of the abstract
- This abstract for appeared for US patent application number 18297372 Titled 'PASSIVE WORLD-REFERENCED EYE TRACKING FOR SMARTGLASSES'
Simplified Explanation
The abstract describes improved systems for accurately measuring eye gaze in an augmented reality head-mounted wearable device. These systems use a radiation direction rerouter, such as a partial retroreflector, to adjust the angle of radiation in the device's waveguide. This adjustment ensures that the radiation is directed towards an outcoupler at an angle that is parallel to the user's gaze angle. By placing a partial retroreflector on the waveguide's surface opposite the outcoupler, an additional reflection is created. This reflection helps match the gaze angle of the user's eye to the angle of an image of the eye pupil captured by a world-facing radiation detector, such as a camera.
Original Abstract Submitted
Improved systems ensuring an accuracy of eye gaze measurements in an augmented reality head-mounted wearable device include a radiation direction rerouter (e.g., a partial retroreflector) configured to adjust an angle of incidence of the radiation in the waveguide at a first surface of a waveguide to produce radiation directed at an adjusted angle of incidence at an outcoupler such that the output direction is essentially parallel to the gaze angle of the user's eye. For example, a partial retroreflector may be disposed on a surface of the waveguide opposite the outcoupler provides an additional reflection so that the gaze angle of the user's eye is matched to an angle of an image of the eye pupil onto a world-facing radiation detector (e.g., a camera).
