US Patent Issued to Meta Platforms Technologies on July 29 for "Liquid crystal polarization hologram (LCPH) based eye tracking for AR/VR" (Washington, Ohio Inventors)

ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,797, issued on July 29, was assigned to Meta Platforms Technologies LLC (Menlo Park, Calif.).

"Liquid crystal polarization hologram (LCPH) based eye tracking for AR/VR" was invented by Hao Yu (Kent, Ohio), Qing Chao (Redmond, Wash.), Lu Lu (Kirkland, Wash.) and Xinqiao Liu (Medina, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An eye-tracking system includes a substrate transparent to visible light and configured to be placed in a field of view of an eye of a user, a plurality of waveguides on the substrate, a light source optically coupled to the plurality of waveguides, and a plurality of polarization volume holograms (PVHs) in the field of...