ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,222,524, issued on Feb. 11, was assigned to Nikon Corp. (Tokyo).
"Ocular optical system and head mounted display" was invented by Hidetsugu Takagi (Yokohama, Japan) and Miho Matsumoto (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ocular optical system including a Fresnel lens having a plurality of Fresnel zones formed on a lens surface on an observation object side, the plurality of Fresnel zones being arranged concentrically side by side along an aspherical surface having a shape which is rotationally symmetric with respect to a central axis of the Fresnel lens, the ocular optical system satisfying the conditional expression 0greater thanPAE...