US Patent Issued to Nikon on June 23 for "Variable magnification optical system, optical equipment, and method for producing variable magnification optical system" (Japanese Inventors)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,623, issued on June 23, was assigned to Nikon Corp. (Tokyo).

"Variable magnification optical system, optical equipment, and method for producing variable magnification optical system" was invented by Yoko Komatsubara (Yokohama, Japan) and Takeshi Umeda (Fujisawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A variable magnification optical system comprising, in order from an object side, a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group and a fourth lens group; upon varying a magnification, respective distances between neighboring lens groups being varied; the first ...