ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,550,622, issued on Feb. 10, was assigned to TDK Corp. (Tokyo).
"Optical device and optical system" was invented by Tomohito Mizuno (Tokyo), Hideaki Fukuzawa (Tokyo) and Tetsuya Shibata (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "This optical device includes a light-emitting unit that is configured to emit a light; a first magnetic element; and a circuit, wherein the first magnetic element includes a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, a reflected light reflected by an object to be irradiated with the light is applied to ...