ALEXANDRIA, Va., June 12 -- United States Patent no. 12,298,594, issued on May 13, was assigned to KYOCERA SOC Corp. (Yokohama, Japan).
"Objective lens" was invented by Takao Tanabe (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An objective lens configured by multiple lenses each consisting of a single lens has a retro ratio of 1.5 or higher. The multiple lenses configure a substantially afocal first lens group and a positive second lens group arranged in this order from a magnification side. The first lens group includes a 1a lens group having a negative power and a 1b lens group having a positive power which are arranged in this order from the magnification side. Provided that a focal len...