US Patent Issued to CHANGCHUN INSTITUTE OF OPTICS, FINE MECHANICS AND PHYSICS, CHINESE ACADEMY OF SCIENCES on Sept. 2 for "Method and device for compensating surface error of holographic grating substrate" (Chinese Inventors)

ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,405,570, issued on Sept. 2, was assigned to CHANGCHUN INSTITUTE OF OPTICS, FINE MECHANICS AND PHYSICS, CHINESE ACADEMY OF SCIENCES (Changchun, China).

"Method and device for compensating surface error of holographic grating substrate" was invented by Heshig Bayan (Changchun, China), Shan Jiang (Changchun, China), Yubo Li (Changchun, China), Zhaowu Liu (Changchun, China), Wei Wang (Changchun, China), Wenhao Li (Changchun, China), Shuo Li (Changchun, China) and Yanxiu Jiang (Changchun, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method and a device for compensating a surface error of a holographic grating substrate based on scanning and exposur...