US Patent Issued to 3M Innovative Properties on Sept. 9 for "Optical stack having absorbing polarizer, half-wave retarder, and reflective polarizer" (South Korean, American Inventors)

ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,411,275, issued on Sept. 9, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Optical stack having absorbing polarizer, half-wave retarder, and reflective polarizer" was invented by Adam D. Haag (Woodbury, Minn.), Sun-Yong Park (Gyeonggi-do, South Korea) and Martin E. Denker (Vadnais Heights, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical stack includes a reflective polarizer, an absorbing polarizer, and a half-wave retarder. The half-wave retarder is disposed between the reflective and absorbing polarizers. For substantially normally incident light and a first polarization state, the reflective polarizer reflects at lea...