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公开(公告)号：US20220268818A1
公开(公告)日：2022-08-25
申请号：US17627118
申请日：2020-03-31
IPC分类号： G01R15/24 , G01R33/032
摘要： A magnetic field sensor element 1 includes a light emitter 10 emitting a first linearly polarized light, a first optical element 20 emitting a first linearly polarized wave and the second linearly polarized wave in response to a first linearly polarized light incident, and emitting a second linearly polarized light in response to a third linearly polarized wave and the a linearly polarized wave incident, at least one pair of magnetic field sensor elements 50 capable of disposing in a predetermined magnetic field across the measured conductor, having a light transmissive, changing the phase of transmitted light in accordance with the magnetic field, and fixing a relative position therebetween, an optical path 30 including a first optical path propagating the first linearly polarized wave and the fourth linearly polarized wave, and a second optical path propagating the second linearly polarized wave and the third linearly polarized wave, and connected to the first optical element and the magnetic field sensor element, a detected signal generator 60 outputting a detected signal corresponding to the magnetic field, by receiving two components of the second linearly polarized light, and converting to the electrical signal, and an optical branching element transmitting the first linearly polarized light to the first optical element and branching the second linearly polarized light to the detected signal generator.
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公开(公告)号：US20220107370A1
公开(公告)日：2022-04-07
申请号：US17427908
申请日：2019-08-29
IPC分类号： G01R33/032 , G02F1/09
摘要： An interference type optical magnetic field sensor device 1 has a light emitter 10 emitting first linearly polarized light, a first optical element 30 emitting 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 element 50 disposed at least a portion thereof within a predetermined magnetic field an optical path unit 40 connected 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 generator 60 outputting 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 element 20 transmitting 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.
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公开(公告)号：US20220146600A1
公开(公告)日：2022-05-12
申请号：US17427837
申请日：2019-08-29
IPC分类号： G01R33/032 , G02F1/09 , G02B27/28
摘要： A magnetic field sensor element 30 has a first polarization maintaining fiber 31 separating the linearly polarized light into a first linearly polarized wave propagated along the first slow axis and a second linearly polarized wave propagated along the first phase advance axis faster than the first linearly polarized wave, and propagating the first linearly polarized wave and the second linearly polarized wave, a second polarization maintaining fiber 32 having a second slow axis and a second phase advance axis, and connected to the first polarization maintaining fiber so that the second phase advance axis and the second slow axis are inclined 45 degrees with respect to the first phase advance axis and the first slow axis, a Faraday rotator 33 optically connected to the second polarization maintaining fiber, and shifting a phase of circularly polarized light emitted from the second polarization maintaining fiber in response to magnetic field at which the magnetic field sensor element is disposed, and a mirror element 34 connected to the Faraday rotator, and generating the return light.
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公开(公告)号：US20200309869A1
公开(公告)日：2020-10-01
申请号：US16651900
申请日：2018-09-28
发明人： Toshiya KUBO , Mitsunori MIYAMOTO , Toshiro SATO
IPC分类号： G01R33/032 , G01R15/24 , G02B6/024
摘要： To provide a magnetic sensor element and a magnetic sensor device that can be easily manufactured and can reduce a loss of light to the extent possible. The above-described problem is solved by a magnetic sensor element comprising a planar lightwave circuit (11) provided with a light branching part (12), an input optical fiber (19) and an output optical fiber (20) connected to the planar lightwave circuit (11), a metal magnetic body type light transmitting film (30) that is provided on one end surface of the planar lightwave circuit (11) and transmits light entered from the input optical fiber (19), and a reflecting film (40) that is provided on the metal magnetic body type light transmitting film (30) and reflects the transmitted light. The output optical fiber (20) is a polarization-plane maintaining optical fiber, and the input optical fiber (19) and the output optical fiber (20) are aligned and connected to the planar lightwave circuit (11).
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公开(公告)号：US20240347251A1
公开(公告)日：2024-10-17
申请号：US18701250
申请日：2023-08-22
发明人： Mitsunori MIYAMOTO , Toshiya KUBO
IPC分类号： H01F10/16
CPC分类号： H01F10/16
摘要： An isotropic granular thin film having a high sensitivity to an external magnetic field when linearly polarized light enters from the normal direction of a magnetic thin film is provided. An isotropic granular thin film 1 in which ferromagnetic nanoparticles 3 are dispersed in a dielectric matrix 2, wherein the ferromagnetic nanoparticle 3 consists of Co, an average particle diameter of the ferromagnetic nanoparticle 3 is not less than 5.0 nm and not more than 17.0 nm, a particle volume density of the ferromagnetic nanoparticle 3 is not less than 1 vol % and not more than 20 vol %, and magnetic dipole interaction energy of the ferromagnetic nanoparticle 3 is less than or equal to 2.0E-26 J.
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公开(公告)号：US20240003994A1
公开(公告)日：2024-01-04
申请号：US18037203
申请日：2021-09-10
发明人： Mitsunori MIYAMOTO , Toshiya KUBO
IPC分类号： G01R33/032 , G01R33/00
CPC分类号： G01R33/0322 , G01R33/0052
摘要： A magnetic field sensor head includes an optical fiber, a GI fiber whose one end is optically connected to the optical fiber, a magnetic film joined to the other end of the GI fiber, a reflection film joined to a surface of the magnetic film opposite to a surface joined to the magnetic film, and a support member joined to a surface of the reflection film opposite to the surface joined to the magnetic film.
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