US Patent Issued to Meta Platforms Technologies on Nov. 25 for "Suppression of first-order diffraction in a two-dimensional grating of an output coupler for a head-mounted display" (California, Washington Inventors)

ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,481,155, issued on Nov. 25, was assigned to Meta Platforms Technologies LLC (Menlo Park, Calif.).

"Suppression of first-order diffraction in a two-dimensional grating of an output coupler for a head-mounted display" was invented by Haiwen Wang (Stanford, Calif.), Yu Shi (Redmond, Wash.), Siddharth Buddhiraju (Redmond, Wash.) and Hee Yoon Lee (Kirkland, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An output grating for waveguide of a head-mounted display is configured to suppress the (1, 1) diffraction order of the output grating. The grating has a design of two or more materials having different refractive indices. The design is repeated periodi...