Diamond magneto-optical sensor
US-2024168107-A1 · May 23, 2024 · US
Atomic magnetometer, gradiometer, and biomagnetism measurement apparatus
US2019391215A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2019391215-A1 |
| Application number | US-201916447089-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 20, 2019 |
| Priority date | Jun 26, 2018 |
| Publication date | Dec 26, 2019 |
| Grant date | — |
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Abstract
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An atomic magnetometer includes a laser light source that emits light, a light splitting unit that splits the light emitted from the laser light source into a first light beam and a second light beam, a transparent cell filled with an alkali metal atom and through which the first light beam is transmitted; and a photodetector.
First claim
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1 . An atomic magnetometer comprising: a laser light source configured to emit light; a light splitting unit configured to split the light emitted from the laser light source into at least a first light beam and a second light beam; a transparent cell filled with an alkali metal atom and through which the first light beam is transmitted; and a photodetector configured to receive the first light beam which has transmitted through the transparent cell and the second light beam which has not transmitted through the transparent cell. 2 . The atomic magnetometer according to claim 1 , further comprising a position adjustor configured to adjust a position of the photodetector. 3 . The atomic magnetometer according to claim 1 , wherein the alkali metal atom is any one of potassium, rubidium, and cesium. 4 . A gradiometer comprising the atomic magnetometer according to claim 1 . 5 . A biomagnetism measurement apparatus comprising: the atomic magnetometer according to claim 1 ; and a controller configured to control the atomic magnetometer. 6 . An atomic magnetometer for measuring a strength of a magnetic field using probe light, the atomic magnetometer comprising: a laser light source configured to emit probe light; a light splitting unit configured to split the probe light into a first light beam and a second light beam; a transparent cell filled with an alkali metal atom and through which the first light beam is transmitted; and a photodetector configured to detect an intensity of interfering light between the first light beam having transmitted through the transparent cell and the second light beam. 7 . The atomic magnetometer according to claim 6 , wherein the first light beam and the second light beam are each a linearly polarized light beam, and the atomic magnetometer further comprises a polarization plane rotator configured to rotate a polarization plane of at least one of the first light beam and the second light beam. 8 . The atomic magnetometer according to claim 7 , wherein the polarization plane of the first light beam is not parallel to the polarization plane of the second light beam. 9 . The atomic magnetometer according to claim 7 , wherein the polarization plane of the first light beam is orthogonal to the polarization plane of the second light beam. 10 . The atomic magnetometer according to claim 6 , wherein a phase difference between the first light beam and the second light beam is 180 degrees. 11 . The atomic magnetometer according to claim 6 , further comprising a position adjustor configured to adjust a position of the photodetector. 12 . The atomic magnetometer according to claim 6 , further comprising a deflector configured to deflect the second light beam toward the photodetector. 13 . The atomic magnetometer according to claim 6 , wherein the alkali metal atom is any one of potassium, rubidium, and cesium. 14 . A gradiometer comprising the atomic magnetometer according to claim 6 . 15 . A biomagnetism measurement apparatus comprising: the atomic magnetometer according to claim 6 ; and a controller configured to control the atomic magnetometer.
Assignees
Inventors
Classifications
- G01R33/26Primary
using optical pumping · CPC title
Measuring gradient · CPC title
Magnetic field sensors · CPC title
Human Necessities · mapped topic
- G01R33/032Primary
using magneto-optic devices, e.g. Faraday {or Cotton-Mouton effect} · CPC title
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- What does patent US2019391215A1 cover?
- An atomic magnetometer includes a laser light source that emits light, a light splitting unit that splits the light emitted from the laser light source into a first light beam and a second light beam, a transparent cell filled with an alkali metal atom and through which the first light beam is transmitted; and a photodetector.
- Who is the assignee on this patent?
- Osaka Takanobu, Ricoh Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01R33/26. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Dec 26 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).