US Patent Issued to 3M Innovative Properties on July 8 for "Optical systems and optical filters" (American, Chinese Inventors)

ALEXANDRIA, Va., July 9 -- United States Patent no. 12,352,991, issued on July 8, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Optical systems and optical filters" was invented by Guanglei Du (Pittsford, N.Y.), John A. Wheatley (Lake Elmo, Minn.), Yi Hang Lv (Shanghai), Anthony M. Renstrom (Forest Lake, Minn.), Neeraj Sharma (Lake Elmo, Minn.) and Fuguo Xu (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical system includes a multilayer optical film configured to block transmission of visible light but allow peaks or bands of certain visible wavelengths to pass through; an object disposed on a first side of the multilayer optical film; and a light source and a light sensor ...