US Patent Issued to 3M Innovative Properties on Oct. 28 for "Optical film and polarizing beam splitter" (Minnesota, Washington Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,455,409, issued on Oct. 28, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Optical film and polarizing beam splitter" was invented by Zhisheng Yun (Sammamish, Wash.), Timothy J. Nevitt (Red Wing, Minn.), John D. Le (Woodbury, Minn.) and Susan L. Kent (Shorewood, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Optical films and polarizing beam splitters including the optical films are described. In some cases, the optical film includes a first optical stack disposed on, and spaced apart by one or more spacer layers from, a second optical stack, each optical stack comprising a plurality of polymeric interference layers reflecting an...