US Patent Issued to Nikon on June 24 for "Zoom optical system, optical apparatus and method for manufacturing the zoom optical system" (Japanese Inventors)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,339,428, issued on June 24, was assigned to Nikon Corp. (Tokyo).

"Zoom optical system, optical apparatus and method for manufacturing the zoom optical system" was invented by Ayumu Makida (Kawaguchi, Japan), Tomoki Ito (Kawasaki, Japan) and Satoshi Miwa (Yokohama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A zoom optical system (ZL) comprises, in order from an object: a first lens group (G1) having a positive refractive power; and a second lens group (G2) having a negative refractive power, wherein upon zooming, a distance between the adjacent lens groups changes. The zoom optical system further comprises an aperture stop (S) disposed closer t...