ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,222,581, issued on Feb. 11, was assigned to TOKYO VISIONARY OPTICS Co. Ltd. (Tokyo).
"Imaging lens" was invented by Masaki Yamazaki (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens, a fourth lens with positive refractive power, and a fifth lens with negative refractive power, wherein said first lens has an object-side surface being convex in a ...