US Patent Issued to Nikon on July 14 for "Zoom optical system, optical apparatus and method for manufacturing the zoom optical system" (Japanese Inventors)

ALEXANDRIA, Va., July 14 -- United States Patent no. 12,681,278, issued on July 14, was assigned to Nikon Corp. (Tokyo).

"Zoom optical system, optical apparatus and method for manufacturing the zoom optical system" was invented by Takeshi Umeda (Fujisawa, Japan), Tomoki Ito (Kawasaki, Japan) and Atsushi Shibayama (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A zoom optical system (ZL) comprises: a first lens group (G1) disposed closest to an object and having a positive refractive power; an aperture stop (S) disposed closer to an image than the first lens group (G1); a positive lens component disposed so as to oppose the image side of the aperture stop (S); and a lens group (G3) having the positive l...