CN209460386U - Multichannel atom magnetic detector - Google Patents
Multichannel atom magnetic detector Download PDFInfo
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- CN209460386U CN209460386U CN201822063495.9U CN201822063495U CN209460386U CN 209460386 U CN209460386 U CN 209460386U CN 201822063495 U CN201822063495 U CN 201822063495U CN 209460386 U CN209460386 U CN 209460386U
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Abstract
The utility model provides a kind of multichannel atom magnetic detector comprising at least one probe assembly, each probe assembly include: multiple detection gas chambers in the same plane；And light splitting member, each detection gas chamber for being assigned to the light beam from light source in the probe assembly, wherein multiple detection gas chambers of every group of detection gas chamber are arranged relative to light splitting member central symmetry or axial symmetry.The multichannel atom magnetic detector has high detection density and advantageously reduces noise.
Description
Technical field
The utility model relates to a kind of atom magnetic detector, especially a kind of multichannel atom magnetic detector.
Background technique
Optical pumping atom probe technology is realized using the magnetic effect of atomic spin to faint by light beam polarized atom gas
The technology of magnetic-field measurement.Since the nineties in last century, with the new physical effect of atomic spin, new manipulating principle and method
Discovery, the especially mankind in 2002 start can to manipulate atomic spin and realize without spin-exchange relaxation (Spin Exchange
Relaxation Free, SERF) since state, the magnetic-field measurement of ultra-high sensitive is realized in the precession based on SERF state atomic spin
Research starts of interest by people.This method can substantially surmount the sensitivity that existing measurement of correlation means are realized, so that people
Class obtains the new tool in the understanding world.It can be worked under room temperature environment based on the atomic magnetic force of optical pumping original Detection Techniques,
Cooling, the small in volume without liquid helium, and the mass production of low cost can be realized by semiconductor technology, be magneticencephalogram,
The weak magnetic detection of magnetocardiogram and other medicine, biology, Material Field brings new dawn.
SERF mechanism is most earlier than 1973 by Princeton University Happer professor et al. discovery.2002, Princeton
The group of university professor Romalis leader is demonstrated for the first time based on the atomic magnetic force of SERF principle, and single channel sensitivity reaches
7fT/Hz1/2, and reaching 0.16fT/Hz at present1/2, it has been more than the level that best SQUID magnetometer can achieve
(0.91fT/Hz1/2)。
Chinese patent discloses CN108459282A and describes a kind of atom magnetometer/gradometer comprising detection gas chamber,
Laser light source, modulation coil and detection device.The excitation beam that laser light source generates makes to detect the alkali metal vapour pole in gas chamber
Change, modulation coil generates the modulation magnetic field of known strength to alkali metal vapour, and the detection light beam that laser light source generates is by alkali gold
It is detected after belonging to steam by detection device, to obtain the magnetic field strength to be measured or gradient information at detection gas chamber based on modulation magnetic field.
In the single atom magnetometer/gradiometer, a detection gas chamber is only included, i.e., it is single channel detection.
Miniaturization atom magnetic detectors all at present are single channel magnetometer or gradometer, are limited to shell ruler
The factors such as the crosstalk of very little, difficulty of processing, modulation coil, detection dot density are low, it is difficult to carry out high density measurement.In addition, each magnetic
Power meter or gradometer use independent light source, and not only every channel manufacturing cost is high, but also light intensity between different light sources and partially
Vibration sex differernce cause the signal local noise level difference between detector larger, carry out proximity detector gradient calculate and
When noise reduction process, it is difficult to obtain good effect.
Utility model content
In order to solve the problems in the existing technology, the purpose of this utility model is to provide a kind of multichannel nonmagnetic atoms
Detector comprising: at least one probe assembly, each probe assembly include: multiple detection gas chambers in the same plane；With
And light splitting member, for distributing the light beam from light source to the multiple detection gas chamber, wherein every group of detection gas chamber it is more
A detection gas chamber is arranged relative to light splitting member central symmetry or axial symmetry.
Since multiple detection gas chambers are arranged relative to light splitting member central symmetry or axial symmetry and receive light splitting member
Light splitting, it is achieved that multi-channel detection.The nonmagnetic atom panel detector structure is simple, detection density is high, is easy to inhibit noise, and
The fixation of the relative position of multiple detection gas chambers.
In one embodiment, the light splitting member is used to a branch of light beam from same light source being assigned to the spy
Survey each detection gas chamber in component.
In one embodiment, multiple detection gas chambers of every group of detection gas chamber are arranged relative to light splitting member axial symmetry.Also,
Every beam light beam in multi beam light beam from multiple light sources is separately dispensed into multiple probe gas by the light splitting member
In detection gas chamber axisymmetric each other in room, wherein each detection gas chamber receives at least a branch of light beam.
Further, in one embodiment, at least part detection gas chamber in multiple detection gas chambers can receive two beams
Light beam or the beamwidth light beam being broadened.
In one embodiment, the multichannel atom magnetic detector further includes shell, be used to accommodate it is described at least one
Probe assembly.
In one embodiment, the light source accommodates in the housing.
In one embodiment, the light source is arranged outside shell.
In one embodiment, each probe assembly further includes multiple photoelectric sensors, is used to detect by visiting accordingly
The information for surveying the light beam of gas chamber is arranged after detection gas chamber accordingly in optical path, and also relative to light splitting structure
Part central symmetry or axial symmetry.
In one embodiment, each probe assembly further includes multiple polarizers, is used to be converted into justifying by light beam
Light beam is arranged between light splitting member and corresponding detection gas chamber in optical path, and also relative in light splitting member
The heart is symmetrical or axial symmetry.
In one embodiment, each probe assembly includes modulation coil, and multiple detection gas chambers of each probe assembly share
Same group of modulation coil.
In this embodiment, since multiple detection gas chambers share one group of modulation coil, it avoids and is modulated using multiple groups
The cross-interference issue that coil generates, and reduce the volume of detector.
In another embodiment, each probe assembly further includes multiple groups modulation coil, and every group of modulation coil is relative to each
Gas chamber setting is detected, and passes through common controller Collaborative Control.
In this embodiment, the Collaborative Control of multiple groups modulation coil helps to reduce crosstalk.
In one embodiment, the atom magnetic detector includes two or more probe assemblies, described two or more
A probe assembly is arranged in plane that is parallel to each other and being offset from one another.
In this embodiment, detection density further increases.
In one embodiment, the atom magnetic detector includes two or more probe assemblies, described two or more
A probe assembly is arranged in the same plane and is parallel to the plane and is offset from one another.
In this embodiment, detection density further increases.
In one embodiment, the light splitting member of the two or more probe assemblies will be from the common of common light source
Light beam is assigned to each detection gas chamber.
In this embodiment, each detection gas chamber of two or more probe assemblies, which uses, is originated from common light beam
Light therefore can advantageously reduce detection noise.
In one embodiment, each probe assembly includes four detection gas chambers, in the same plane relative to light splitting structure
It part uniform intervals and is centrosymmetrically arranged.
In one embodiment, each probe assembly includes two detection gas chambers, in the same plane relative to light splitting structure
Part axial symmetry arrangement.
In one embodiment, each probe assembly includes four detection gas chambers, in the same plane relative to light splitting structure
Part axial symmetry arrangement, wherein two detection gas chambers are located adjacent one another, and it is located adjacent one another that another two detects gas chamber.
Detailed description of the invention
It, below will be to needed in the embodiment attached in order to illustrate more clearly of the technical solution of the embodiment of the present disclosure
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the disclosure, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the perspective view of the atom magnetic detector of first embodiment according to the present utility model；
Fig. 2 shows the perspective views of the atom magnetic detector of second embodiment according to the present utility model.
Specific embodiment
In the following, the atom magnetic detector according to embodiment of the present disclosure is described in detail with reference to the drawings.To keep the disclosure real
The purposes, technical schemes and advantages for applying example are clearer, below in conjunction with the attached drawing in the embodiment of the present disclosure, implement to the disclosure
Technical solution in example is clearly and completely described, it is clear that and described embodiment is disclosure a part of the embodiment, and
The embodiment being not all of.
Therefore, the detailed description of the embodiment of the disclosure provided in conjunction with attached drawing is not intended to limit below claimed
The scope of the present disclosure, but be merely representative of the selected embodiment of the disclosure.Based on the embodiment in the disclosure, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model of disclosure protection
It encloses.In addition, for clarity degree and terseness, it is convenient to omit the description to known function and structure.
The term used in following described and claimed and word are not limited to its book purpose and meaning, but practical
Clear and consistent understanding of the novel human in reception and registration to the disclosure.Therefore, it will be appreciated by those skilled in the art that, the disclosure
Being described below for each embodiment is for illustration purposes only, rather than is defined by the appended claims and the equivalents thereof to limit
The disclosure purpose.
As used in the present invention, the use of " one embodiment " or " embodiment " is not meant at this
Feature described in one embodiment of utility model is only used for the embodiment, but the feature of an embodiment can also
To be used for other embodiments or be combined with the feature in other embodiments to obtain yet another embodiment, and institute
There are these embodiments that should all fall into the protection scope of the utility model.
Fig. 1 shows the perspective view of the atom magnetic detector 100 of first embodiment according to the present utility model.
As shown in Figure 1, atom magnetic detector 100 includes a probe assembly, the probe assembly includes light splitting member
110, polarizer 120, detection gas chamber 130, photoelectric detector 140, modulation coil 150, field compensation coil 160 and shell
(not shown), the shell accommodate light splitting member 110, polarizer 120, detection gas chamber 130, photoelectric detector 140, modulation lines
Circle 150 and field compensation coil 160.
In the present embodiment, detection gas chamber 130 is four, four detection gas chambers 130 arrangement in the same plane and
It is centrosymmetrically arranged relative to light splitting member 110, and four detection gas chambers 130 share light splitting member 110.
In the present embodiment, include multiple detection gas chambers 130 in the shell of atom magnetic detector 100, effectively realize more
The magnetic strength or magnetic gradient survey in channel.Since multiple detection gas chambers 130 are centrosymmetrically arranged and connect around same light splitting member 110
The light splitting from the light splitting member 110 is received, therefore significantly improves detection density, and guarantee more in atom magnetic detector 100
The fixation and stabilization of the relative position of a detection gas chamber 130.In addition, this structure design being centrosymmetrically arranged is simple, assembly
It is low with manufacturing cost.
Atom magnetic detector can also include laser light source (not shown) and collimating element (not shown).Laser light source is used for
The light beam with specific wavelength and polarization characteristic is generated as needed, and light beam is incident on by processing such as collimations
Light splitting member 110.Received light beam is then separately dispensed into each detection gas chamber 130 by light splitting member 110.At this
In example, a laser light source generates a branch of light beam, and the beam light beam is assigned to each spy by light splitting member 110
Survey gas chamber 130.
In embodiment, it is centrosymmetrically arranged around light splitting member 110 and evenly spaced four detection gas chambers 130 is total
With same light splitting member 110, to use same a branch of light beam from same light source.Therefore, each with multiple detection gas chambers 130
From comparing the case where using the different polarization light beam from different light sources, the noise eliminated or reduced between light beam is different
Influence to magnetic information detection, improves noise reduction efficacy, this is in the case where atom magnetic detector 100 is based on magnetic gradient measurements
It is particularly advantageous, improves gradient noise reduction efficacy.
In this example, atom magnetic detector 100 includes internal laser light source, and four detection gas chambers 130 share same
Internal laser light source.In this example, since multiple detection gas chambers 130 share same laser light source, laser light source is reduced
Usage quantity and cost, reduce the volume occupied needed for atom magnetic detector 100 and make it close with higher detection
Degree.The shared laser light source of multiple detection gas chambers 130 is not limited to one, also, in addition to a laser light source, atom magnetic detector
100 can also include other spare laser light source.
In other examples, laser light source can be set except shell, then pass through the light guide devices such as optical fiber
The light beam that laser light source generates is directed to light splitting member.In this example, multiple detection gas chambers 130 share light splitting member
110, and the light beam being originated from a branch of light beam is received, therefore be also beneficial to account for needed for reducing atom magnetic detector 100
Volume simultaneously makes it with higher detection density, and is also beneficial to reduce detection noise.
As shown in Figure 1, light splitting member 110 can be prisms with four 45 ° of clinoplains, pyramidal.Each
Clinoplain is towards a detection gas chamber 130, so that light splitting member 110 is by the received light beam propagated in vertical direction
It is reflected into the multiple light beams propagated in the horizontal direction rectangular with vertical direction and is assigned to each light beam
Each corresponding detection gas chamber 130.
It detects gas chamber 130 and accommodates alkali metal gas.Light beam may be used to alkali metal atom and polarize, and can
With the precession behavior for detecting alkali metal atom.Modulation coil 150 is used to generate the modulation magnetic field of known strength, this is known strong
The modulation magnetic field of degree is with detected magnetic field superposition with collective effect in polarized alkali metal atom.Light beam for detection is logical
Detection gas chamber 130 is crossed to have an effect with alkali metal atom, so that the light field polarization state of the light beam changes.
In the present embodiment, photoelectric detector 140 is four.Each photoelectric detector 140 is arranged in optical path each
After detecting gas chamber 130, and also relative to 110 central symmetry of light splitting member.Photoelectric detector 140 is respectively received and is detected logical
The light beam of corresponding detection gas chamber 130 is crossed, to obtain information relevant to magnetic field to be measured at gas chamber 130 is detected, for example,
Magnetic strength information or magnetic gradient information.
In addition, polarizer 120 is four, each polarizer 120 is arranged in light splitting member 110 and detection in optical path
Between gas chamber 130, the light beam for that will be directed to detection gas chamber 130 is converted to circularly polarized light beam.Polarizer 120 can
Think quarter-wave plate.
In the present embodiment, four detection gas chambers 130 share one group of modulation coil 150.One group of modulation coil 150 indicates altogether
Same-action effectively modulates one or more pairs of modulation coils 150 in magnetic field to generate.For example, in this example, one group of modulation coil
150 can be a pair of individual coil or its can be three pairs of coils being arranged on three directions perpendicular to one another.
Four detection gas chambers 130 share one group of modulation coil 150 and are advantageous, can reduce in this way the use of coil at
This, and can also eliminate each detection gas chamber 130 respectively using individual modulation coil 150 in the case where generate it is multiple
Crosstalk between modulation coil 150, and the detection gas chamber 130 in atom magnetic detector 100 is got closer together.Phase
Than in traditional single channel atom magnetic detector, occupancy body high according to the detection density of the atom magnetic detector 100 of the present embodiment
Product is small.
Further, it should be noted that four detection gas chambers 130 are not necessarily to share one group of modulation coil 150, the utility model
It is without being limited thereto.In other examples, atom magnetic detector 100 can have four groups of modulation coils to be respectively used to four probe gas
Room 130.Four groups of modulation coils are carried out multi-channel detection by common controller Collaborative Control and reduce crosstalk.
According to the present embodiment, atom magnetic detector 100 further includes four groups of magnetic compensation coils 160.For purposes of clarity, exist
Only the formula of drawing has gone out one group of magnetic compensation coil 160 around the setting of a detection gas chamber 130 in Fig. 1, and is omitted respectively around another
Other three groups of magnetic compensation coils 160 of outer three detection gas chambers setting.Every group of magnetic compensation coil 160 is respectively used to for each spy
It surveys gas chamber 130 and carries out field compensation, to offset ambient noise magnetic field.In this example, magnetic compensation coil 160 is three couples of Hai Muhuo
Hereby coil.
In addition, in other embodiments, modulation coil 150 is also used as bucking coil with for carrying out field compensation,
Without individual magnetic compensation coil 160 is arranged.In another other embodiments, four detection gas chambers 130 can share one group
Magnetic compensation coil 160.
It should be noted that it will be appreciated by those skilled in the art that detection gas chamber 130 quantity be not limited to 4, may be used also
3,5,6 etc., preferably 4 are thought, as long as it is centrosymmetrically arranged relative to light splitting member 110.It is evenly spaced apart cloth
Set the structure that 4 detection gas chambers 130 are conducive to simplify light splitting member 110 and polarizer 120 etc..
In an other embodiment, multiple detection gas chambers 130 are centrosymmetrically arranged, and in multiple detection gas chambers 130
Several detection gas chambers 130 can be located adjacent one another, rather than be evenly spaced apart to arrange.
Fig. 2 shows the perspective views of the atom magnetic detector 200 of second embodiment according to the present utility model.
As shown in Fig. 2, similar with atom magnetic detector 100 shown in FIG. 1, atom magnetic detector 200 includes a detection
Component, the probe assembly include light splitting member 210, polarizer 220, detection gas chamber 230, photoelectric detector 240, modulation lines
Circle 250, magnetic compensation coil 260 and shell (not shown), the shell accommodate light splitting member 210, polarizer 220, detection
Gas chamber 230, photoelectric detector 240, modulation coil 250 and magnetic compensation coil 260.In order to avoid obscuring the important of the utility model
Aspect will not be described in detail further and the same or similar component of atom magnetic detector 100 according to first embodiment.
Unlike atom magnetic detector 100 shown in FIG. 1, atom magnetic detector 200, which has, is arranged in same plane
On four detection gas chambers 230, four detection gas chambers 230 relative to 210 axial symmetry of light splitting member arrange, two of them detection
Gas chamber 230 is located adjacent one another, and it is located adjacent one another that another two detects gas chamber 230.
In the present embodiment, include multiple detection gas chambers 230 in the shell of atom magnetic detector 200, effectively realize more
The magnetic strength or magnetic gradient survey in channel.Since multiple detection gas chambers 230 are arranged simultaneously relative to same 210 axial symmetry of light splitting member
The light splitting from the light splitting member 210 is received, therefore significantly improves detection density, and guarantee same atom magnetic detector 200
The fixation and stabilization of the relative position of interior multiple detection gas chambers 230.In addition, the design of this axial symmetry arrangement is simple, assembly
It is low with manufacturing cost.
It is similar with the atom magnetic detector 100 in first embodiment, it is also wrapped according to the atom magnetic detector 200 of the present embodiment
Include a laser light source (not shown) and collimating element (not shown).The laser light source generates a branch of light beam, light source interface
211 for receiving the light beam via collimating element collimation and being transmitted to light splitting member 210.Light splitting member 210 is then
The received light beam of institute is divided into four bundles light beam and is assigned in axisymmetric two detection gas chambers 230 each other, so that each
Detection gas chamber 230 receives a branch of light beam.
In other examples, the light beam emitted by laser light source can also be divided into two beamwidths by light splitting member 210
The two beamwidths light beam is simultaneously separately dispensed into two sides by light beam, so that every beam light beam is assigned simultaneously to two positioned at the same side
A detection gas chamber 230.
In another other example, atom magnetic detector 200 also may include two laser light sources and two beams of generation are inclined
Shake light beam, and the component 210 that is split of every beam light beam in the two beams light beam is assigned to axisymmetric two detections each other
In gas chamber 230, so that each detection gas chamber 230 receives a branch of light beam.
Relative to 210 axial symmetry of light splitting member arrangement four detection gas chambers 230 entirely or partly receipt source in same
The light of the same light beam of one laser light source, therefore the usage quantity and cost of laser light source are reduced, reduce nonmagnetic atom
The volume occupied needed for detector 200 makes it with higher detection density, and eliminates or reduce and using each self-excitation
Noise variance in the case where radiant between multiple light sources, improves noise reduction efficacy.Preferably, swashed above-mentioned using one
In the example of radiant, the equal receipt source of four detection gas chambers 230 relative to 210 axial symmetry of light splitting member arrangement swashs in same
The light of the same light beam of radiant, the quantity and cost of laser light source, the required volume quilt occupied of atom magnetic detector 200
It further decreases and noise reduction efficacy is further improved.
As shown in Fig. 2, light splitting member 210 can be the prism with two 45 ° of clinoplains, each clinoplain face
To two neighbouring detection gas chambers 230, so that light splitting member 210 reflects the received light beam propagated in vertical direction
Each light beam is simultaneously assigned to accordingly by multiple light beams for propagating in the rectangular horizontal direction of Cheng Yu vertical direction
Detection gas chamber 230.
It detects gas chamber 230 and accommodates alkali metal gas.Photoelectric detector 240 is four, and each photoelectric detector 240 is in optical path
It is upper to be arranged after each detection gas chamber 230, and also relative to 210 axial symmetry of light splitting member.Polarizer 220 is four,
Each polarizer 220 is arranged between light source assembly and detection gas chamber 230 in optical path, for that will be directed to detection gas chamber
230 light beam is converted to circularly polarized light beam.
In other examples, the neighbouring two detection gas chamber 230 positioned at the same side can share a polarizer
220。
In the present embodiment, four detection gas chambers 230 share one group of modulation coil 250.Therefore, making for coil can be reduced
With cost, and can also eliminate each detection gas chamber 230 respectively using individual modulation coil 250 in the case where generate
Crosstalk between multiple modulation coils 250 gets closer together the detection gas chamber 230 in atom magnetic detector 200.Phase
Than in traditional single channel atom magnetic detector, occupancy body high according to the detection density of the atom magnetic detector 200 of the present embodiment
Product is small.
It should be noted that it will be appreciated by those skilled in the art that detection gas chamber 230 quantity be not limited to 4, may be used also
Think other quantity, for example, 2,6 etc., as long as it is arranged relative to light source assembly axial symmetry.
In an other embodiment, one also can be set at two neighbouring in a second embodiment detection gas chambers 230
A detection gas chamber 230.That is, in this further embodiment, two detection gas chambers 230 are relative to light source assembly axial symmetry
Arrangement.In this further embodiment, atom magnetic detector includes a light source, generates a branch of polarised light, and light splitting member will
Light beam is separately dispensed into each detection gas chamber, so that each detection gas chamber receives a beamwidth light beam, passes through phase
Two photodetectors that gas chamber 230 is transferred to after the detection gas chamber 230 should be detected.Therefore, each detection gas chamber can
To realize the detection at two o'clock, detection density is further improved.
In a further embodiment, atom magnetic detector can also be included in and atom magnetic detector 100 as described above
In probe assembly or atom magnetic detector 200 in an other probe assembly of the probe assembly in Different Plane.
The atom magnetic detector of 3rd embodiment according to the present utility model is described below.The atom magnetic detector and atom
Magnetic detector 100 is similar.The two the difference is that, atom magnetic detector in addition to include light splitting member 110, polarizer
120, except a probe assembly for detecting gas chamber 130, photoelectric detector 140, modulation coil 150 and field compensation coil 160,
It further include another probe assembly in parallel with the probe assembly and offset another plane.Another detection group
Part equally includes light splitting member, polarizer, photoelectric detector, modulation coil, bucking coil and relative to light source assembly center
Four detection gas chambers being arranged symmetrically.Therefore, the detection density of atom magnetic detector further increases.Four detection gas chambers can
To be aligned respectively with four detection gas chambers 130, but the utility model is without being limited thereto.It should be understood that probe assembly
Two are not limited to, can also be more, and each probe assembly is not necessarily to arrange in the same manner.
In the present embodiment, the detection gas chamber in each probe assembly shares same laser light source.Therefore, it further decreases
The usage quantity and cost of laser light source reduces the volume occupied needed for atom magnetic detector and makes it with higher spy
Survey density.
In addition, two probe assemblies respectively have a light splitting member 110, two light splitting members 110 are same in the future
The same light beam of light source is incident on each detection gas chamber in every group of probe assembly.Wherein, the preceding detection in optical path
The light splitting member 110 of component can have semi-transparent semi-reflecting property, by a part of received light beam be reflected into the spy
Survey each detection gas chamber of component, at the same allow another part of received light beam be transmitted to another light splitting member
110。
Two probe assemblies also each have one group of modulation coil.Two groups of modulation coil offset certain distances are to avoid string
It disturbs.
In another other embodiment, atom magnetic detector can also be included in and atom magnetic detector as described above
The probe assembly in probe assembly or atom magnetic detector 200 in 100 is in the same plane and to be parallel to the plane inclined each other
The other probe assembly moved.
The atom magnetic detector of fourth embodiment according to the present utility model is described below.The atom magnetic detector and atom
Magnetic detector 100 is similar.The two the difference is that, atom magnetic detector in addition to include light splitting member 110, polarizer
120, except a probe assembly for detecting gas chamber 130, photoelectric detector 140, modulation coil 150 and field compensation coil 160,
It further include in the same plane and being parallel to another probe assembly that the plane is offset from one another with the probe assembly.This two
A probe assembly can be identical or different.
In the present embodiment, each probe assembly shares same laser light source.That is, point of two probe assemblies
Common polarization light beam from common light source is assigned to each detection gas chamber by light component.Specifically, which generates
Light beam be split, generated light beam is incident on the light splitting member in every group of probe assembly, then passes through light splitting member
The each detection gas chamber being assigned in every group of probe assembly.Therefore, further reduced laser light source usage quantity and at
This, reduces the volume occupied needed for atom magnetic detector and makes it with higher detection density.
In other examples, above-mentioned two groups of probe assemblies can use individual laser light source respectively.
The scope of the present disclosure is not limited by above described embodiment, but by appended claims and its
Equivalent limits.
Claims (16)
1. a kind of multichannel atom magnetic detector (100,200) characterized by comprising
At least one probe assembly, each probe assembly include:
Multiple detection gas chambers (130,230) in the same plane；And
Light splitting member (110,210), for distributing the light beam from light source to the multiple detection gas chamber,
Wherein, multiple detection gas chambers of every group of detection gas chamber are arranged relative to light splitting member central symmetry or axial symmetry.
2. multichannel atom magnetic detector according to claim 1, which is characterized in that further include:
The light splitting member is used for each spy being assigned to a branch of light beam from same light source in the probe assembly
Survey gas chamber.
3. multichannel atom magnetic detector according to claim 1, which is characterized in that
The beamwidth that at least part detection gas chamber in the multiple detection gas chamber receives two beam light beams or is broadened
Light beam.
4. multichannel atom magnetic detector according to claim 1, which is characterized in that further include:
Shell is used to accommodate at least one described probe assembly.
5. multichannel atom magnetic detector according to claim 4, which is characterized in that
The light source accommodates in the housing.
6. multichannel atom magnetic detector according to claim 4, which is characterized in that
The light source is arranged outside shell.
7. multichannel atom magnetic detector according to claim 1, which is characterized in that
Each probe assembly includes:
Multiple photoelectric sensors (140,240), for detecting the information of the light beam by corresponding detection gas chamber, in light
Road is arranged after detection gas chamber accordingly, and also relative to light splitting member central symmetry or axial symmetry.
8. multichannel atom magnetic detector according to claim 1, which is characterized in that
Each probe assembly includes:
Multiple polarizers (120,220) are arranged in optical path and are being divided for light beam to be converted into circularly polarized light beam
Between component and corresponding detection gas chamber, and also relative to light splitting member central symmetry or axial symmetry.
9. multichannel atom magnetic detector according to claim 1, which is characterized in that
Each probe assembly includes:
Multiple detection gas chambers of modulation coil (150,250), each probe assembly share same group of modulation coil.
10. multichannel atom magnetic detector according to claim 1, which is characterized in that
Each probe assembly includes:
Multiple groups modulation coil (150,250), every group of modulation coil is arranged relative to each detection gas chamber, and passes through common control
Device Collaborative Control processed.
11. multichannel atom magnetic detector according to claim 1, which is characterized in that
The atom magnetic detector includes two or more probe assemblies, and the two or more probe assemblies are respectively arranged
In plane that is parallel to each other and being offset from one another.
12. multichannel atom magnetic detector according to claim 1, which is characterized in that
The atom magnetic detector includes two or more probe assemblies, and the two or more probe assemblies are arranged in together
In one plane and it is parallel to the plane and is offset from one another.
13. multichannel atom magnetic detector according to claim 11 or 12, which is characterized in that
Common polarization light beam from common light source is assigned to often by the light splitting member of the two or more probe assemblies
A detection gas chamber.
14. multichannel atom magnetic detector according to claim 1, which is characterized in that
Each probe assembly includes four detection gas chambers (130), in the same plane simultaneously relative to light splitting member uniform intervals
And it is centrosymmetrically arranged.
15. multichannel atom magnetic detector according to claim 1, which is characterized in that
Each probe assembly includes two detection gas chambers (230), is arranged in the same plane relative to light splitting member axial symmetry.
16. multichannel atom magnetic detector according to claim 1, which is characterized in that
Each probe assembly includes four detection gas chambers (230), and axial symmetry is arranged in the two of light splitting member in the same plane
Side, wherein two detection gas chambers of side are located adjacent one another, and two detection gas chambers of the other side are located adjacent one another.
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| CN111281370A (en) * | 2020-02-19 | 2020-06-16 | 北京航空航天大学 | Gradiometer configuration type magnetoencephalography system based on SERF atomic magnetometer |
| WO2020119642A1 (en) * | 2018-12-10 | 2020-06-18 | 中科知影(北京)科技有限公司 | Multi-channel atomic magnetic detector |
| CN111856350A (en) * | 2020-07-09 | 2020-10-30 | 吉林大学 | Non-shielding vector SERF atomic magnetic gradiometer adopting active magnetic field to offset |
| CN112540328A (en) * | 2020-12-30 | 2021-03-23 | 之江实验室 | Probe structure based on double-air-chamber optical pumping alkali metal atomic gradient magnetometer |
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| WO2020119642A1 (en) * | 2018-12-10 | 2020-06-18 | 中科知影(北京)科技有限公司 | Multi-channel atomic magnetic detector |
| US11448712B2 (en) | 2018-12-10 | 2022-09-20 | Cognitive Medical Imaging Ltd. | Multi-channel atomic magnetic detector |
| CN111281370A (en) * | 2020-02-19 | 2020-06-16 | 北京航空航天大学 | Gradiometer configuration type magnetoencephalography system based on SERF atomic magnetometer |
| CN111281370B (en) * | 2020-02-19 | 2021-07-20 | 北京航空航天大学 | Gradiometer configuration type magnetoencephalography system based on SERF atomic magnetometer |
| CN111856350A (en) * | 2020-07-09 | 2020-10-30 | 吉林大学 | Non-shielding vector SERF atomic magnetic gradiometer adopting active magnetic field to offset |
| CN111856350B (en) * | 2020-07-09 | 2022-01-07 | 吉林大学 | Non-shielding vector SERF atomic magnetic gradiometer adopting active magnetic field to offset |
| CN112540328A (en) * | 2020-12-30 | 2021-03-23 | 之江实验室 | Probe structure based on double-air-chamber optical pumping alkali metal atomic gradient magnetometer |
| CN112540328B (en) * | 2020-12-30 | 2022-03-25 | 之江实验室 | Probe structure based on double-air-chamber optical pumping alkali metal atomic gradient magnetometer |
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