US Patent Issued to Nikon on March 31 for "Zoom optical system, optical apparatus, and method for manufacturing zoom optical system" (Japanese Inventor)

ALEXANDRIA, Va., March 31 -- United States Patent no. 12,591,121, issued on March 31, was assigned to Nikon Corp. (Tokyo).

"Zoom optical system, optical apparatus, and method for manufacturing zoom optical system" was invented by Keigo Koida (Kawasaki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A zoom optical system that can achieve size and weight reduction and has high optical performance, an optical apparatus, and a method for manufacturing the zoom optical system are provided.A zoom optical system GL used in an optical apparatus such as a camera 1 includes a first lens group G1 having positive refractive power and disposed closest to an object side, a second lens group G2, and a rear lens group...