ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,474,559, issued on Nov. 18, was assigned to NIKON Corp. (Tokyo).
"Objective lens, optical system, and microscope" was invented by Katsuya Watanabe (Yokohama, Japan) and Azuna Nonaka (Yokohama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An objective lens (OL) comprises, disposed in order from an object: a positive lens (L11); a negative meniscus lens (L12) cemented to the positive lens (L11) and having a concave surface facing the object; and a positive meniscus lens (L13) having a concave surface facing the object; wherein the objective lens satisfies following conditional expressions 2.03less than equal ton1mless than equal to2.30 and 20less ...