US Patent Issued to Nikon on Oct. 27 for "Variable magnification optical system, optical device, and method for manufacturing variable magnification optical system" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,775,155, issued on Oct. 27, was assigned to Nikon Corp. (Tokyo).

"Variable magnification optical system, optical device, and method for manufacturing variable magnification optical system" was invented by Tomoyuki Sashima (Tokyo) and Akihiko Obama (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A variable magnification optical system includes, in order from an object side, a first lens group having positive refractive power; a second lens group having negative refractive power; and a third lens group having positive refractive power; upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group and the ...