US Patent Issued to Nikon on March 17 for "Zoom optical system, optical apparatus and method for manufacturing the zoom optical system" (Japanese Inventor)

ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,563, issued on March 17, 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).

According to the abstract* released by the U.S. Patent & Trademark Office: "A variable-power optical system (ZL) is constituted by, in order from the object side and along the optical axis, the following: a first lens group (G1) that has a positive refractive power; a second lens group (G2); a third lens group (G3) that has a negative refractive power; and a rear group (GR) that includes a plurality of lens groups. When power is varied from the wide-angle end to the telephoto end, the i...