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US 12,218,161 B2Granted
Optical sensor, optical sensor unit, optical sensor device, and information terminal device
AssigneeTDK Corporation
InventorsHideaki Fukuzawa, Dai Matsuoka, Tomohito Mizuno, Tetsuya Shibata
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Abstract
An optical sensor includes a wavelength filter configured to transmit light in a specific wavelength range and a magnetic element including a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer. The light passing through the wavelength filter is applied to the magnetic element and the light applied to the magnetic element is detected.
Claims16
An optical sensor comprising:
- a wavelength filter configured to transmit light in a specific wavelength range;
- and
- a magnetic element including a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer,
- wherein the light in the specific wavelength range transmitted through the wavelength filter is applied to the magnetic element and the light in the specific wavelength range applied to the magnetic element is detected.
1 more element
Dependencies are inferred from the claim text.