US Patent Issued to TOPPAN on Feb. 11 for "Wavelength selective filter, display, optical device, and method of producing wavelength selective filter" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,222,530, issued on Feb. 11, was assigned to TOPPAN INC. (Tokyo).

"Wavelength selective filter, display, optical device, and method of producing wavelength selective filter" was invented by Masashi Kawashita (Tokyo) and Yukari Oda (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical device including a concavo-convex structure layer composed of a plurality of protrusions arranged having a subwavelength period; a high refractive index layer located on the concavo-convex structure and having a surface shape following the concavo-convex structure; and a low refractive index layer located on the high refractive index layer and having a surface sha...