US Patent Issued to Microsoft Technology Licensing on Sept. 23 for "Slanted surface relief grating replication by optical proximity recording" (California, Washington Inventors)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,422,677, issued on Sept. 23, was assigned to Microsoft Technology Licensing LLC (Redmond, Wash.).

"Slanted surface relief grating replication by optical proximity recording" was invented by Bernard Charles Kress (Redwood City, Calif.), Ishan Chatterjee (Seattle), Joel Steven Kollin (Seattle) and Maria Esther Pace (Palo Alto, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Slanted surface relief gratings for use in an optical display system in an HMD device are replicated in a manufacturing process that utilizes non-contact optical proximity recording into a specialized photo-sensitive resin that is disposed over a waveguide substrate. The recordi...