PASSIVE WORLD-REFERENCED EYE TRACKING FOR SMARTGLASSES: abstract simplified (18297372)

• This abstract for appeared for patent application number 18297372 Titled 'PASSIVE WORLD-REFERENCED EYE TRACKING FOR SMARTGLASSES'

Simplified Explanation

The abstract describes an improved system for accurately measuring eye gaze in an augmented reality head-mounted wearable device. This system includes a component called a radiation direction rerouter, which adjusts the angle of radiation in the device's waveguide. This adjustment ensures that the radiation is directed towards an outcoupler at an angle that matches the user's eye gaze. A partial retroreflector is used to provide an additional reflection, aligning the gaze angle of the user's eye with the angle of an image of the eye pupil captured by a camera. Overall, this system enhances the accuracy of eye gaze measurements in the wearable device.

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).