ALEXANDRIA, Va., June 18 -- United States Patent no. 12,326,542, issued on June 10, was assigned to SAMYANG OPTICS Co. LTD (Changwon-si, South Korea).
"Lens optical system" was invented by Moon Kyung Kim (Changwon-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a lens optical system, which includes: a first lens group having a positive refractive power; a second lens group which performs focusing and has a negative refractive power; and a third lens group having a positive refractive power. A lens among lenses included in the first lens group, which is closest to an object, is a meniscus lens having a positive refractive power, the second lens group includes o...