ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,971, issued on Feb. 10, was assigned to Canon K.K. (Tokyo).
"Optical device and image pickup apparatus" was invented by Toru Ishimasa (Kanagawa, Japan), Toshihiro Ogawa (Tokyo), Kohei Matsumoto (Kanagawa, Japan) and Mitsuru Morohashi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical device includes a first lens group corresponding to a first optical axis, and a second lens group corresponding to a second optical axis and configured to change a focal length range of an optical system from a first focal length range to a second focal length range by being disposed on the first optical axis on a side of the first lens group adjacent to a...