ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,455,436, issued on Oct. 28, was assigned to CANON K.K. (Tokyo).
"Optical system and image pickup apparatus" was invented by Yuma Kobayashi (Tochigi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical system consists of, in order from an object side to an image side, a first unit, a second unit, and a third unit. The first unit includes a first substrate, a first lens disposed on the object side of the first substrate, and a second lens having negative power and disposed on the image side of the first substrate. The second unit includes a second substrate and a third lens having positive power and disposed on the object side or the image sid...