The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2026
Filed:
Feb. 10, 2023
Tdk Corporation, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
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 the first magnetic element, a first signal corresponding to an emission of the light from the light-emitting unit is input to the circuit, and a second signal corresponding to an application of the reflected light to the first magnetic element is input from the first magnetic element to the circuit.