Citizen Watch Company, Ltd.

Citizen Finedevice Co., Ltd.

Simshu University

Yuta Fujishiro

Toshiya Kubo

Mitsunori Miyamoto

Makoto Sonehara

Toshiroh Sato

An interference type optical magnetic field sensor devicehas a light emitteremitting first linearly polarized light, a first optical elementemitting a first linearly polarized wave and a second linearly polarized wave orthogonal to the first linearly polarized wave with respect to incident the first linearly polarized light, and emitting a second linearly polarized light with respect to incident third linearly polarized wave and a forth linearly polarized wave orthogonal to the third linearly polarized wave, a magnetic field sensor elementdisposed at least a portion thereof within a predetermined magnetic field an optical path unitconnected to the first optical element and the magnetic field sensor element, and having a first optical path propagating the first linearly polarized wave and the forth linearly polarized wave, and a second optical path propagating the second linearly polarized wave and the third linearly polarized wave, a detection signal generatoroutputting a detection signal by separating the second linearly polarized light into an S polarization component and a P polarization component, converting the S polarization component and the P polarization component into an electric signal, and an optical branching elementtransmitting the first linearly polarized light to the first optical element, and branching the second linearly polarized light to the detection signal generator, wherein the magnetic field sensor element emits the first linearly polarized wave and the second linearly polarized wave as incident light, and emits the third linearly polarized wave with respect to the first linearly polarized wave and the forth linearly polarized wave with respect to the second linearly polarized wave as return light.

Growing community of inventors

Nagano, Japan

Yuta Fujishiro