US Patent Issued to 3M Innovative Properties on June 10 for "Low wave-front error optical filter film" (American, Japanese Inventors)

ALEXANDRIA, Va., June 18 -- United States Patent no. 12,326,586, issued on June 10, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Low wave-front error optical filter film" was invented by John D. Le (Woodbury, Minn.), Kazuta Saito (Tokyo) and Michael L. Steiner (New Richmond, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical assembly including a first optical substrate including a first major surface; a multilayer polymeric optical film disposed on the first major surface of the first optical substrate and including a plurality of polymeric layers numbering greater than about 50 in total; and a first optical bonding layer having an average thickness of less than about 0.5 micr...