US Patent Issued to TOPPAN on July 1 for "Optical device and method of producing optical device" (Japanese Inventors)

ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,902, issued on July 1, was assigned to TOPPAN INC. (Tokyo).

"Optical device and method of producing optical device" was invented by Yukari Oda (Tokyo), Masashi Kawashita (Tokyo), Yoshiko Ishimaru (Tokyo) and Azusa Yamagishi (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical device includes a concave-convex structure layer having a concavo-convex structure on a surface thereof, the concavo-convex structure formed of a plurality of convexities or a plurality of concavities which are arranged with a sub-wavelength period, a high refractive index layer made of a material having a refractive index higher than that of the concavo-convex struc...