ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,557,974, issued on Feb. 24, was assigned to FUJIFILM Corp. (Tokyo).
"Objective lens for an endoscope and endoscope" was invented by Tomoyuki Baba (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The objective lens for an endoscope consists of, from an object side to an image side, a first lens group having positive optical power and a second lens group having positive optical power. During focusing, only the second lens group moves. The first lens group includes a single lens that has negative optical power closest to the object side. The objective lens for an endoscope satisfies conditional expressions determined in advance related to a m...