The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2025
Filed:
Feb. 16, 2023
Meta Platforms Technologies, Llc, Menlo Park, CA (US);
Meta Platforms Technologies, LLC, Menlo Park, CA (US);
Abstract
An eye tracking system for absolute phase unwrapping includes a fringe projector, a camera, and an illumination module. The projector provides a periodical fringe pattern onto the eye and the camera captures a reflection of the fringe pattern. Fourier transform, wavelet transform, phase shifting, and/or variants thereof may be used to determine a phase of the fringe pattern and generate a wrapped phase map. Spatial phase unwrapping is used for phase unwrapping resulting in a relative unwrapped phase map. The illumination module with a known relative position between the fringe projector and the camera is used to create glint(s) on the eye. Detected glints on the original image are used to convert the relative unwrapped phase map to an absolute unwrapped phase map.