US Patent Issued to Meta Platforms Technologies on Nov. 4 for "Lightguide with radial pupil replication and visual display based thereon" (Washington, California Inventors)

ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,461,370, issued on Nov. 4, was assigned to Meta Platforms Technologies LLC (Menlo Park, Calif.).

"Lightguide with radial pupil replication and visual display based thereon" was invented by Ningfeng Huang (Redmond, Wash.), Alexander Koshelev (Redmond, Wash.) and Giuseppe Calafiore (Redmond, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A pupil-replicating waveguide usable in a VR display may have a slab of transparent material, an input grating coupler supported by the slab at the center of the slab, with output gratings supported by the slab and surrounding the input grating coupler. The input grating coupler couples image light into the slab, wh...