US Patent Issued to Nikon on Sept. 1 for "Zoom optical system, optical apparatus and method for manufacturing the zoom optical system" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,724,252, issued on Sept. 1, was assigned to Nikon Corp. (Tokyo).

"Zoom optical system, optical apparatus and method for manufacturing the zoom optical system" was invented by Fumiaki Ohtake (Tokyo), Tomoyuki Sashima (Tokyo) and Takahiro Ishikawa (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A variable magnification optical system (ZL) comprises: a first lens group (G1) having negative refractive power; and a rear group (GR) including at least one lens group. When changing the magnification, the distances between adjacent lens groups change. At least one lens group of the rear group (GR) includes a final lens group (GE) having positive ...