ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,411,005, issued on Sept. 9, was assigned to PIXART IMAGING INC. (Hsin-Chu County, Taiwan).

"Optical encoding system with reduced total harmonic distortion" was invented by Meng-Yee Lim (Penang, Malaysia), Priscilla Tze-Wei Goh (Penang, Malaysia), Kuan-Choong Shim (Penang, Malaysia) and Gim-Eng Chew (Penang, Malaysia).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided an optical encoding system including a photodiode array and a code disk opposite to each other. The code disk is arranged with multiple code slits at a ring area corresponding to the photodiode array. A length direction of each photodiode of the photodiode array has at least o...