ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,510,699, issued on Dec. 30, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).
"Optical construction" was invented by Joseph P. Attard (Woodbury, Minn.), Kristy A. Gillette (Spring Valley, Wis.), Tri D. Pham (Woodbury, Minn.) and Zhaohui Yang (North Oaks, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical construction includes a lens layer having a structured first major surface including a plurality of microlenses; an optical filter disposed on the lens layer; an optically opaque mask layer disposed between the lens layer and the optical filter and defining a plurality of openings therein; and a low index layer disposed on the...