ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,797, issued on Jan. 13, was assigned to Canon K.K. (Tokyo).
"Optical device and manufacturing method therefor" was invented by Hideo Akiba (Utsunomiya, Japan) and Kyohei Ishikawa (Utsunomiya, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical device includes, in sequence, a surface formed of a metal oxide, a samarium oxide-containing layer in contact with the surface formed of a metal oxide, and a magnesium fluoride-containing layer in contact with the samarium oxide-containing layer so as to suppress optical absorption resulting from high-rate sputter deposition of a magnesium fluoride-containing layer on a surface formed of a metal ox...