ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,422,630, issued on Sept. 23, was assigned to VISERA TECHNOLOGIES COMPANY Ltd. (Hsin-Chu, Taiwan).
"Optical device" was invented by Wei-Hsun Cheng (Hsin-Chu, Taiwan), Wei-Ko Wang (Hsin-Chu, Taiwan) and Hsin-Yi Hsieh (Hsin-Chu, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical device is provided. The optical device includes a substrate, a waveguide layer, a first input grating, a first fold grating, and an isolation layer. The waveguide layer is disposed on the substrate. The first input grating is disposed in the waveguide layer. A first incident light passes through the first input grating to form a first light. The first fold grating is...