ALEXANDRIA, Va., June 9 -- United States Patent no. 12,287,493, issued on April 29, was assigned to Sony Interactive Entertainment Inc. (Tokyo).
"Lens system and image observation apparatus" was invented by Manabu Ishioka (Tokyo), Yasutoshi Katsuda (Kanagawa, Japan) and Shotaro Tada (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A lens system provides to a user, a high-definition image in which generation of concentric circles is reduced. The lens system has one or more Fresnel lenses. A lens surface of each of the Fresnel lenses has a plurality of grooves that is concentrically formed. Both a pitch which is the distance between two adjacent grooves and the depth of each of the plurality of grooves va...