US Patent Issued to KONICA MINOLTA on July 29 for "Variable magnification projection optical system and projection apparatus" (Japanese Inventor)

ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,760, issued on July 29, was assigned to KONICA MINOLTA INC. (Tokyo).

"Variable magnification projection optical system and projection apparatus" was invented by Atsuo Masui (Sakai, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A variable magnification projection optical system includes, in order from an enlargement side: a first lens group having negative refractive power; a second lens group having negative refractive power; and a third lens group having positive refractive power. During zooming, the first lens group is fixed, and the second lens group and the third lens group move. The second lens group includes a plurality of lenses each h...