CN103412304A - Matter wave correlated image generation method and device thereof - Google Patents
Matter wave correlated image generation method and device thereof Download PDFInfo
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- CN103412304A CN103412304A CN2013102850097A CN201310285009A CN103412304A CN 103412304 A CN103412304 A CN 103412304A CN 2013102850097 A CN2013102850097 A CN 2013102850097A CN 201310285009 A CN201310285009 A CN 201310285009A CN 103412304 A CN103412304 A CN 103412304A
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Abstract
The invention relates to a matter wave correlated image generation method and a device thereof. The method comprises the steps of generating a partially coherent matter wave, projecting the partially coherent matter wave onto an atomic grating and forming matter wave density images of cycle distribution on detection surfaces with integer multiples of Taber distances, selecting a signal matter wave which projects an object to be measured and a reference matter wave in the density images, projecting an object by using the signal matter wave, and carrying out barrel measurement on the signal matter wave which projects the object and carrying out space association with the reference matter wave to obtain the image of the object. According to the method and the device, a cold atomic matter wave instead of a light wave is employed as a wave source of the correlated imaging, the wavelength is shorted, and the imaging resolution is higher. According to the method and the device, the signal matter wave and the reference matter wave are generated through the atomic grating, the destroy of matter wave quantum correlation by a matter wave beam splitter and an asymmetric transmission process are avoided, the device is simple, the imaging speed is fast, and the number of imaging is large.
Description
Technical field
The present invention relates to a kind of matter wave relevance imaging method and device thereof.
Technical background
Relevance imaging (terrible imaging) is a kind of novel image-forming mechanism.Partial coherence or quantum entanglement characteristic that it utilizes light source, realized obtaining in the light path that does not contain object the diffraction image that object has nanometer resolution, and its principle as shown in Figure 1.The a branch of continuous partial coherence light beam that counterfeit thermal light source 11 produces is divided into flashlight and reference light by beam splitter 12.Flashlight irradiates a hollow out object 14 of choosing in advance.After bucket detector 15 was arranged on described hollow out object 14, described bucket detector 15 consisted of avalanche photodide, is placed in fixed position.Described reference light is captured by surface detector 13.The measurement result of described bucket detector 15 and surface detector 13 is sent into data processor 16.After processing, described data processor 16 can obtain the double velocity correlation function of described light beam at bucket detector 15 and surface detector 13 places.Imaging results can be from obtaining the Output rusults of described data processor.Relevance imaging is widely used in distributed image processing, distributed awareness and the communications field.
Along with the rise of cold atom optics in recent years, and Han Baili-Blang-Te Weisi (Hanbury-Brown Twiss, or be called for short HBT) effect in the realization in matter wave field (referring to scientific paper Schellekens, M.et al.Hanbury Brown Twiss Effect for Ultracold Quantum Gases SCIENCE2005310,648-651), the feasibility of matter wave relevance imaging is more and more paid close attention to.Above Han Baili-Blang-Te Weisi scheme can be used for the transmission of matter wave single-bit quantum information, but can not be directly used in the imaging field with many bits quantum information.Relevance imaging between material particle and material particle has significant application value aspect quantum communications, quantum calculation.Matter wave is compared with light wave, has shorter wavelength, has higher imaging resolution.
Relevance imaging requires to realize the transmission of many bits quantum information.Beam splitter is an important devices in the relevance imaging system.The light beam that light source produces is divided into two by beam splitter, and wherein light beam is called flashlight, and another bundle is called reference light.On the signal light path, comprise object to be imaged, reference path does not comprise object, by the coincidence measurement to two-beam, can obtain in reference path the picture of object.In the matter wave field, making complicated processing difficulty and the beam splitting efficiency of matter wave beam splitting device are not high.It is very difficult that this causes the relevance imaging method to realize in the matter wave field, limited application and the popularization of relevance imaging technology.
Formerly, in technology, there is a kind of life cycle grating to replace the relevance imaging method of beam splitter (referring to scientific paper Li, H., Chen, Z., Xiong, J.& Zeng, G.Periodic diffraction correlation imaging without a beam-splitter.Opt.Express201220,2956-2966).The method has advantages of suitable, but still can not use as matter wave relevance imaging scheme, main cause is that the method is to design for counterfeit thermal light source, affecting the matter wave that entity grating pair that the method adopts sees through and can produce additional phase due to van der Waals interaction power.This additional bit is met affects the accuracy of imaging results, thereby has limited application and the popularization of the method in the matter wave field.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned formerly technology, a kind of relevance imaging method that step is simple, realize conveniently, can be widely used in matter wave is provided.
Another object of the present invention is to provide a kind of imaging device that can reduce costs and can realize the matter wave imaging.
It is a kind of matter wave relevance imaging method that the present invention solves the problems of the technologies described above the technical scheme of taking, and the steps include:
(1) the relevant matter wave of generating portion;
(2) described partial coherence matter wave projection atomic raster is produced to semiochemicals ripple and reference material ripple;
(3) described semiochemicals ripple projection is placed in to the hollow out object on detection plane in advance;
(4) will throw semiochemicals ripple after object and carry out bucket and measure and carry out space correlation with described reference material ripple, obtain the image of described object.
(5) described object is carried out to repeatedly correlation measurement, associated data are carried out to the signal processing.
The preferred a kind of technical scheme of matter wave relevance imaging method of the present invention, described partial coherence matter wave is the cold atomic beam of monoenergetic.
The preferred a kind of technical scheme of matter wave relevance imaging method of the present invention, described atomic raster is to be formed by the laser standing wave field with the off resonance far away of atomic resonance energy level.
The preferred a kind of technical scheme of matter wave relevance imaging method of the present invention, described matter wave sees through atomic raster, on the detection plane of distance atomic raster integral multiple talbot distance, produces the diffraction matter wave with periodic structure.
Matter wave in the preferred a kind of technical scheme of matter wave relevance imaging method of the present invention, any two periodic units of described diffraction matter wave is respectively as the semiochemicals ripple and the reference material ripple that throw object to be measured.
The preferred a kind of technical scheme of matter wave relevance imaging method of the present invention, when described object is carried out to correlation measurement, the semiochemicals ripple after the projection object and the associated data of reference material ripple
Γ=<∫
Objectt(x
1) D (x
1) dx
1D(x
2)=∫
Object<t (x
1) D (x
1) D (x
2) dx
1
=∫
Objectt(x
1)<D (x
1) D (x
2) dx
1
=∫
Objectt(x
1) G
(2)(x
1, x
2) dx
1
Wherein t (x) is the image transmission function of described hollow out object, and D (x) is the atomic density of described diffraction matter wave, ∫
Objectt(x
1) D (x
1) dx
1The data of measuring for described semiochemicals ripple being carried out to bucket, G
(2)(x
1, x
2) be the double velocity correlation function of diffraction matter wave.
The preferred a kind of technical scheme of matter wave relevance imaging method of the present invention, when described object is carried out to correlation measurement, the double velocity correlation characteristic of described matter wave
G
(2)(x
1，x
2)＝1+|G
(1)(x
1，x
2)|
2
G wherein
(1)(x
1, x
2) be the single order correlation function of matter wave.
The present invention solves the problems of the technologies described above the technical scheme adopted a kind of matter wave relevance imaging device also is provided, and its design feature comprises:
(1) cold atom group generator, the relevant matter wave of described cold atom group's generator generating portion;
(2) atomic raster, described atomic raster are to be formed by the laser standing wave field with the off resonance far away of atomic resonance energy level, and the described partial coherence matter wave of its diffraction also forms the matter wave distribution with periodic structure;
(3) bucket detector, described bucket detector detects the described semiochemicals ripple after projection object to be measured;
(4) surface detector, described surface detector consists of microchannel plate, for detection of the reference material ripple;
(5) data processor, described data processor receives the signal of described bucket detector and described surface detector, and both are carried out to association process, obtains the image of described object.
The preferred a kind of technical scheme of matter wave relevance imaging device of the present invention, described bucket detector and surface detector are placed in respectively on the periodic structure unit of described partial coherence matter wave beam diffraction formation.
The preferred a kind of technical scheme of matter wave relevance imaging device of the present invention, the data that the semiochemicals ripple by projection after object and reference material ripple signal carry out correlation measurement
Γ=<∫
Objectt(x
1) D (x
1) dx
1D(x
2)=∫
Object<t (x
1) D (x
1) D (x
2) dx
1
=∫
Objectt(x
1)<D (x
1) D (x
2) dx
1
=∫
Objectt(x
1) G
(2)(x
1, x
2) dx
1
Wherein t (x) is the image transmission function of described hollow out object, and D (x) is the atomic density of described diffraction matter wave, ∫
t(x
1) D (x
1) dx
1For the data that described semiochemicals ripple is measured, G
(2)(x
1, x
2) be the double velocity correlation function of diffraction matter wave.
The preferred a kind of technical scheme of matter wave relevance imaging method of the present invention, when described object is carried out to correlation measurement, the double velocity correlation characteristic of described matter wave
G
(2)(x
1，x
2)＝1+|G
(1)(x
1，x
2)|
2
G wherein
(1)(x
1, x
2) be the single order correlation function of matter wave.
The present invention compared with prior art has the following advantages: relevance imaging method of the present invention adopts cold atom matter wave rather than light wave as the wave source of relevance imaging, has shorter wavelength, has the higher characteristics such as imaging resolution; Relevance imaging device of the present invention does not utilize the matter wave beam splitter of making the complicated processing difficulty, but the atomic raster that utilizes laser standing wave field to form carries out diffraction to the incident matter wave, from diffraction pattern, selecting semiochemicals ripple and reference material ripple, avoided matter wave beam splitter and the asymmetric transmitting procedure destruction to the matter wave Quantum Correlation, the advantage such as have reasonable in design, parts are few, realization is convenient, image taking speed is fast, imaging quantity is many.
The accompanying drawing explanation
Fig. 1 is a kind of structural representation of relevance imaging system of prior art.
Fig. 2 is the structural representation of the matter wave relevance imaging system of the embodiment of the present invention.
Fig. 3 is the schematic diagram of the matter wave density image with periodic structure that produces on test surface 23 of atomic raster shown in Figure 2.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.Following examples are explanation of the invention, be reasonable application form of the present invention, and the present invention are not limited to following examples.
Refer to Fig. 2, Fig. 2 is the structural representation of the matter wave imaging device of the embodiment of the present invention.Described matter wave imaging system comprises cold atom group generator 21, atomic raster 22, detection plane 23, hollow out object 231, bucket detector 232, surface detector 233, data processor 24.Described cold atom group generator 21, the generating portion matter wave that is concerned with; Described atomic raster 22 is to be formed by the laser standing wave field with the off resonance far away of atomic resonance energy level, and the described partial coherence matter wave of its diffraction also forms the matter wave distribution with periodic structure; Described hollow out object 231 is objects to be imaged; The described semiochemicals ripple of described bucket detector 232 after for detection of projection object 231 to be measured; Described surface detector 233 consists of microchannel plate, for detection of the reference material ripple; Described data processor 24 is be used to receiving the signal of described bucket detector 232 and described surface detector 233, and both are carried out to association process, obtains the image of described object 231.Described data processor 24 is computing machine.
Below in conjunction with Fig. 2, describe the key step of matter wave formation method of the present invention in detail:
(1) relevant parameter of described cold atom group generator 21 is set, the generating portion matter wave that is concerned with.Then, described partial coherence matter wave is freely fallen on described atomic raster 22 under Action of Gravity Field.
(2) described atomic raster 22, by the cold atom matter wave diffraction of incident, produces the diffraction matter wave with periodic structure.
(3) described diffraction matter wave is projected on the detection plane 23 apart from atomic raster L.
(4) choose semiochemicals ripple and the reference material ripple that described diffraction matter wave forms on described detection plane 23 two periodic units are respectively projection object to be measured;
(5) described semiochemicals ripple projection is placed in to the hollow out object 231. on detection plane in advance
(6) the described semiochemicals ripple of disclosing after 232 pairs of detectors projection objects is measured, and measurement data is input in described data processor 24.
(7) 233 pairs of reference material ripples of described surface detector are measured, in the described data processor 24 of measurement data input.
(8) 24 pairs of described measurement data of disclosing detector 232 and surface detector 233 of described data processor are carried out association process, be about to described bucket detector 232 and 233 pairs of described objects 231 to be imaged of surface detector and carry out correlation measurement, through the data of described data processor 24 correlation measurements be
Γ=<∫
Objectt(x
1) D (x
1) dx
1D(x
2)=∫
Object<t (x
1) D (x
1) D (x
2) dx
1
=∫
Objectt(x
1)<D (x
1) D (x
2) dx
1
=∫
Objectt(x
1) G
(2)(x
1, x
2) dx
1
Wherein t (x) is the image transmission function of described hollow out object, and D (x) is the atomic density of described diffraction matter wave, ∫ t (x
1) D (x
1) dx
1For the data that described semiochemicals ripple is measured, G
(2)(x
1, x
2) be the double velocity correlation function of diffraction matter wave.
For partial coherence matter wave, G
(2)(x
1, x2
)=1+|G
(1)(x
1, x
2) |
2, G wherein
(1)(x
1, x
2) be the single order correlation function of matter wave.
Fig. 3 is the Density Distribution schematic diagram of embodiment of the present invention diffraction matter wave on detection plane 23.Square structure means after described partial coherence matter wave is by the atomic raster diffraction periodic unit formed.Shade structure 31 means semiochemicals ripple projected area, and non-shade structure 32 means reference material ripple projected area.The present embodiment has been realized the matter wave relevance imaging, and has the characteristics such as reasonable in design, parts be few, easy to use.
Claims (11)
1. a matter wave relevance imaging method, is characterized in that, comprises the steps:
(1) the relevant matter wave of generating portion;
(2) described partial coherence matter wave projection atomic raster is produced to semiochemicals ripple and reference material ripple;
(3) described semiochemicals ripple projection is placed in to the hollow out object on detection plane in advance;
(4) will throw semiochemicals ripple after object and carry out bucket and measure and carry out space correlation with described reference material ripple, obtain the image of described object.
(5) described object is carried out to repeatedly correlation measurement, associated data are carried out to the signal processing.
2. matter wave relevance imaging method according to claim 1, it is characterized in that: described partial coherence matter wave is the cold atomic beam of monoenergetic.
3. matter wave relevance imaging method according to claim 1, it is characterized in that: described atomic raster is to be formed by the laser standing wave field with the off resonance far away of atomic resonance energy level.
4. matter wave relevance imaging method according to claim 1 is characterized in that: described matter wave sees through atomic raster, on the detection plane of distance atomic raster integral multiple talbot distance, produces the diffraction matter wave with periodic structure.
5. matter wave relevance imaging method according to claim 4 is characterized in that: the matter wave in any two periodic units of described diffraction matter wave is respectively as semiochemicals ripple and the reference material ripple of projection object to be measured.
6. matter wave relevance imaging method according to claim 5 is characterized in that: when described object is carried out to correlation measurement, and the semiochemicals ripple after the projection object and the associated data of reference material ripple
Γ=<∫
Objectt(x
1) D (x
1) dx
1D(x
2)=∫
Object<t (x
1) D (x
1) D (x
2) dx
1
=∫
Objectt(x
1)<D (x
1) D (x
2) dx
1
=∫
Objectt(x
1) G
(2)(x
1, x
2) dx
1
Wherein t (x) is the image transmission function of described hollow out object, and D (x) is the atomic density of described diffraction matter wave, ∫
Objectt(x
1) D (x
1) dx
1The data of measuring for described semiochemicals ripple being carried out to bucket, G
(2)(x
1, x
2) be the double velocity correlation function of diffraction matter wave.
7. matter wave relevance imaging method according to claim 6, when described object is carried out to correlation measurement, the double velocity correlation characteristic of described matter wave
G
(2)(x
1，x
2)＝1+|G
(1)(x
1，x
2)|
2
G wherein
(1)(x
1, x
2) be the single order correlation function of matter wave.
8. a matter wave relevance imaging device, is characterized in that: comprise
(1) cold atom group generator, the relevant matter wave of described cold atom group's generator generating portion;
(2) atomic raster, described atomic raster are to be formed by the laser standing wave field with the off resonance far away of atomic resonance energy level, and the described partial coherence matter wave of its diffraction also forms the matter wave distribution with periodic structure;
(3) bucket detector, described bucket detector detects the described semiochemicals ripple after projection object to be measured;
(4) surface detector, described surface detector consists of microchannel plate, for detection of the reference material ripple;
(5) data processor, described data processor receives the signal of described bucket detector and described surface detector, and both are carried out to association process, obtains the image of described object.
9. matter wave relevance imaging device as claimed in claim 8, is characterized in that, described bucket detector and surface detector are placed in respectively on the periodic structure unit of described partial coherence matter wave beam diffraction formation.
10. matter wave relevance imaging device as claimed in claim 8, is characterized in that, the data that the semiochemicals ripple by projection after object and reference material ripple signal carry out correlation measurement
Γ=<∫
Objectt(x
1) D (x
1) dx
1D(x
2)=∫
Object<t (x
1) D (x
1) D (x
2) dx
1
=∫
Objectt(x
1)<D (x
1) D (x
2) dx
1
=∫
Objectt(x
1) G
(2)(x
1, x
2) dx
1
Wherein t (x) is the image transmission function of described hollow out object, and D (x) is the atomic density of described diffraction matter wave, ∫ t (x
1) D (x
1) dx
1For the data that described semiochemicals ripple is measured, G
(2)(x
1, x
2) be the double velocity correlation function of diffraction matter wave.
11. matter wave relevance imaging method according to claim 10, is characterized in that, when described object is carried out to correlation measurement, and the double velocity correlation characteristic of described matter wave
G
(2)(x
1，x
2)＝1+|G
(1)(x
1，x
2)|
2
G wherein
(1)(x
1, x
2) be the single order correlation function of matter wave.
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Cited By (6)
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| CN103760560A (en) * | 2014-01-25 | 2014-04-30 | 中国计量学院 | Lengthwise correlation imaging method based on cold atom matter wave |
| CN103985427A (en) * | 2014-05-16 | 2014-08-13 | 中国科学院上海光学精密机械研究所 | Double pulse standing wave coherent beam splitting system used for 87Rb cold atoms |
| CN105589105A (en) * | 2014-10-30 | 2016-05-18 | 中国科学院空间科学与应用研究中心 | Space neutral atom Fourier imaging apparatus |
| WO2017167294A1 (en) * | 2016-03-31 | 2017-10-05 | Weng-Dah Ken | Matter wave treatment method and non-invasive inspection apparatus |
| CN113167857A (en) * | 2018-12-10 | 2021-07-23 | Abb瑞士股份有限公司 | Radar sensor and robot using the same |
| CN115356713A (en) * | 2022-10-18 | 2022-11-18 | 四川康吉笙科技有限公司 | Visual recognition system and method based on digital consciousness |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760560A (en) * | 2014-01-25 | 2014-04-30 | 中国计量学院 | Lengthwise correlation imaging method based on cold atom matter wave |
| CN103760560B (en) * | 2014-01-25 | 2017-03-29 | 中国计量学院 | A kind of longitudinal relevance imaging method based on cold atom matter wave |
| CN103985427A (en) * | 2014-05-16 | 2014-08-13 | 中国科学院上海光学精密机械研究所 | Double pulse standing wave coherent beam splitting system used for 87Rb cold atoms |
| CN103985427B (en) * | 2014-05-16 | 2016-08-24 | 中国科学院上海光学精密机械研究所 | For87the dipulse standing wave of Rb cold atom is concerned with divided beam system |
| CN105589105A (en) * | 2014-10-30 | 2016-05-18 | 中国科学院空间科学与应用研究中心 | Space neutral atom Fourier imaging apparatus |
| CN105589105B (en) * | 2014-10-30 | 2017-10-31 | 中国科学院空间科学与应用研究中心 | A kind of space neutral atom Fourier imaging device |
| WO2017167294A1 (en) * | 2016-03-31 | 2017-10-05 | Weng-Dah Ken | Matter wave treatment method and non-invasive inspection apparatus |
| CN113167857A (en) * | 2018-12-10 | 2021-07-23 | Abb瑞士股份有限公司 | Radar sensor and robot using the same |
| CN113167857B (en) * | 2018-12-10 | 2023-03-24 | Abb瑞士股份有限公司 | Radar sensor and robot using the same |
| CN115356713A (en) * | 2022-10-18 | 2022-11-18 | 四川康吉笙科技有限公司 | Visual recognition system and method based on digital consciousness |
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Application publication date: 20131127 |