Special optical tweezer array generation method and system

Abstract

The invention discloses a special optical tweezers array generation method and system, and the method comprises the steps: employing two acousto-optic deflectors which are perpendicular to each other to sequentially process a laser beam, carrying out the time-sharing scanning modulation or time-sharing scanning and multi-frequency function superposition modulation of the two acousto-optic deflectors, and generating a special optical tweezers array on a two-dimensional plane. According to the invention, the mode of time-sharing scanning modulation or time-sharing scanning and multi-frequency function superposition modulation is adopted to carry out time-sharing scanning modulation on the two acousto-optic deflectors, the optical tweezers array with a special shape is realized, the method is simple to realize, the system required by the realization method is simple in structure and convenient to operate, and the method can be widely applied to various application scenes with special requirements on the optical tweezers array.

Description

Technical Field

[0001] The invention belongs to the technical field of quantum mechanics, and in particular relates to a special optical tweezers array generation method and system. Background Art

[0002] The light spot formed by the strong focus of the laser beam is like a "trap" for dielectric particles. The particles are trapped in it. If the focused light spot is moved, the particles will move with the light spot. Such a strong focused light spot can perform micro-manipulations such as capturing, moving and rotating particles, just like a pair of "tweezers", so it is called optical tweezers. Optical tweezers technology is widely used in research fields such as life sciences, colloid physics, and chemistry, including the study of the mechanical properties of macromolecules or single cells, the interaction between DNA and protein molecules, etc. Optical tweezers technology is also widely used in the field of atomic physics, and its representative is the use of lasers to capture and cool atoms.

[0003] At present, acousto-optic deflectors (AODs) are usually used to generate optical tweezer arrays in experiments, but the resulting optical tweezer arrays are rectangular arrays. However, when complex quantum systems need to be simulated, simple rectangular arrays are difficult to meet research needs. Summary of the invention

[0004] The object of the present invention is to provide a special optical tweezers array generation method and system for generating an optical tweezers array with a special shape.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for generating a special optical tweezers array uses two mutually perpendicular acousto-optic deflectors to process the laser beam in sequence, and performs time-sharing scanning modulation or time-sharing scanning and superposition modulation of multi-frequency functions on the two acousto-optic deflectors to generate a special optical tweezers array on a two-dimensional plane.

[0007] The time-sharing scanning modulation is to input multiple set modulation frequencies and the duration of each modulation frequency to the acousto-optic deflector in a cyclic manner; the multi-frequency function modulation is to input a modulation signal containing multiple radio frequencies to the acousto-optic deflector at the same time, and the amplitude and phase of each radio frequency can be set independently.

[0008] In some embodiments, after the laser is shaped, it is sequentially sent to one of the acousto-optic deflectors, the conjugate optical path module and another acousto-optic deflector for processing to generate a special optical tweezers array.

[0009] In some embodiments, the generated special optical tweezers array is an octagon, an equilateral triangle, a parallelogram, an isosceles right triangle, or other irregular shapes formed by arranging light spots.

[0010] A special optical tweezers array generation method uses a first acousto-optic deflector and a second acousto-optic deflector disposed perpendicularly to each other to process the laser beam in sequence;

[0011] In a first preset time within a time-sharing scanning modulation cycle, applying radio frequency signals having a first frequency and a second frequency to the first acousto-optic deflector to perform multi-frequency function modulation, and applying radio frequency signals having a third frequency and a fourth frequency to the second acousto-optic deflector to perform multi-frequency function modulation;

[0012] In a second preset time within the time-sharing scanning modulation cycle, applying radio frequency signals having a third frequency and a fourth frequency to the first acousto-optic deflector to perform multi-frequency function modulation, and applying radio frequency signals having a first frequency and a second frequency to the second acousto-optic deflector to perform multi-frequency function modulation;

[0013] The octagonal optical tweezers array is obtained by cycling in sequence according to the set time-sharing scanning modulation period;

[0014] The first frequency, the third frequency, the second frequency and the fourth frequency are distributed in an arithmetic progression.

[0015] A special optical tweezers array generation method uses a first acousto-optic deflector and a second acousto-optic deflector disposed perpendicularly to each other to process the laser beam in sequence;

[0016] In a third preset time within the time-sharing scanning modulation cycle, applying radio frequency signals having the fifth frequency and the sixth frequency to the first acousto-optic deflector to perform multi-frequency function modulation, and applying modulation having the fifth frequency to the second acousto-optic deflector;

[0017] In a fourth preset time within the time-sharing scanning modulation cycle, a modulation with a fifth frequency is applied to the first acousto-optic deflector, and a modulation with a sixth frequency is applied to the second acousto-optic deflector;

[0018] The isosceles right triangle optical tweezers array is obtained by cycling in sequence according to the set time-sharing scanning modulation cycle;

[0019] The fifth frequency and the sixth frequency use different frequencies.

[0020] A special optical tweezers array generation method uses a first acousto-optic deflector and a second acousto-optic deflector disposed perpendicularly to each other to process the laser beam in sequence;

[0021] In a fifth preset time within the time-sharing scanning modulation cycle, the first acousto-optic deflector is modulated with the seventh frequency, and the second acousto-optic deflector is modulated with radio frequency signals with the seventh frequency and the eighth frequency respectively to perform multi-frequency function modulation;

[0022] In a sixth preset time in the time-sharing scanning modulation cycle, a modulation with a ninth frequency is applied to the first acousto-optic deflector, and a modulation with a tenth frequency is applied to the second acousto-optic deflector;

[0023] The equilateral triangle optical tweezers array is obtained by cycling in sequence according to the set time-sharing scanning modulation period;

[0024] Among them, the seventh frequency, the eighth frequency, the ninth frequency and the tenth frequency use different frequencies.

[0025] A special optical tweezers array generation method uses a first acousto-optic deflector and a second acousto-optic deflector disposed perpendicularly to each other to process the laser beam in sequence;

[0026] In the seventh preset time in the time-sharing scanning modulation cycle, the first acousto-optic deflector is modulated with the eleventh frequency, and the second acousto-optic deflector is modulated with radio frequency signals with the eleventh frequency and the twelfth frequency respectively to perform multi-frequency function modulation;

[0027] In an eighth preset time within the time-sharing scanning modulation cycle, the first acousto-optic deflector is modulated with a thirteenth frequency, and the second acousto-optic deflector is modulated with radio frequency signals with fourteenth and fifteenth frequencies, respectively, to perform multi-frequency function modulation;

[0028] The parallelogram optical tweezers array is obtained by cycling in sequence according to the set time-sharing scanning modulation period;

[0029] Among them, the eleventh frequency, the twelfth frequency, the thirteenth frequency, the fourteenth frequency, and the fifteenth frequency use different frequencies.

[0030] On the other hand, the present invention also provides a special optical tweezers array generation system, comprising:

[0031] An optical path system, the optical path system comprising a laser source, a beam processing module, a first acousto-optic deflector, a conjugate optical path module and a second acousto-optic deflector sequentially arranged along the optical path, wherein the first acousto-optic deflector and the second acousto-optic deflector are arranged perpendicular to each other;

[0032] A modulation system, the modulation system is used to perform time-sharing scanning modulation or time-sharing scanning and superposition modulation of multi-frequency functions on the first acousto-optic deflector and the second acousto-optic deflector respectively; the time-sharing scanning modulation is to cyclically input multiple set modulation frequencies and the duration of each modulation frequency to the acousto-optic deflector in sequence; the multi-frequency function modulation is to simultaneously input a modulation signal containing multiple radio frequencies to the acousto-optic deflector, and the amplitude and phase of each radio frequency can be set independently.

[0033] In some embodiments, the modulation system includes a control unit and a first radio frequency signal unit and a second radio frequency signal unit connected to the first acousto-optic deflector and the second acousto-optic deflector, respectively;

[0034] The control unit applies radio frequency signals of corresponding frequencies to the first acousto-optic deflector and the second acousto-optic deflector respectively through the first radio frequency signal unit and the second radio frequency signal unit, and performs time-sharing scanning modulation or time-sharing scanning and superposition modulation of multi-frequency functions on the first acousto-optic deflector and the second acousto-optic deflector respectively.

[0035] In some embodiments, the optical path system further includes a reflector, which is used to reflect the obtained special optical tweezers array to a CCD camera.

[0036] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0037] The present invention realizes an optical tweezer array with a special shape by time-sharing scanning modulation or time-sharing scanning and superposition modulation of a multi-frequency function on two acousto-optic deflectors. The method is simple to implement, and the system structure required for the implementation method is simple and easy to operate. It can be widely used in various application scenarios with special requirements for optical tweezer arrays. Moreover, optical tweezer arrays of various shapes can be obtained by simply adjusting the modulation mode of the two acousto-optic deflectors as needed, so that it can well meet the simulation requirements of various complex quantum systems.

[0038] The present invention can be used to simulate various quantum systems in cold atom quantum mechanics and study phenomena such as topological properties, quantum phase transitions and quantum transport therein, providing an important approach and platform for the study, understanding and utilization of quantum mechanics. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 Schematic diagram of the structure of a special optical tweezers array generation system in an embodiment of the present invention.

[0041] Figure 2 Schematic diagram of a special optical tweezers array generated in an embodiment of the present invention.

[0042] in:

[0043] 1. Laser source, 2. Light beam processing module, 3. First acousto-optic deflector, 4. Conjugate optical path module, 5. Second acousto-optic deflector, 6. Reflector, 7. CCD camera, 8. First radio frequency signal unit, 9. Second radio frequency signal unit, 10. Control unit. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0045] Acousto-optic deflector, or AOD for short, is a device made based on the deflection principle that can change the angle of the laser according to the interaction mechanism.

[0046] In view of the problem that usually only rectangular arrays can be obtained when an optical tweezers array is generated using an acousto-optic deflector, the present invention proposes a method for generating a special optical tweezers array. The method is based on modulating the acousto-optic deflector in different ways to obtain an optical tweezers array with a specific shape.

[0047] The "special" in the special optical tweezers array of the present invention is relative to the conventional rectangular array. Any shape different from the rectangular array can be called a special array, such as an octagon, equilateral triangle, parallelogram, isosceles right triangle, and other irregular shapes formed by light spots.

[0048] In some embodiments of the present invention, a method for generating a special optical tweezers array uses two mutually perpendicularly arranged acousto-optic deflectors to process the laser beam in sequence, and performs time-sharing scanning modulation or time-sharing scanning and superposition modulation of multi-frequency functions on the two acousto-optic deflectors respectively, so as to generate a special optical tweezers array with a special shape arranged by light spots on a two-dimensional plane.

[0049] Here, two mutually perpendicularly arranged acousto-optic deflectors refer to the one-dimensional light trap arrays generated by the two acousto-optic deflectors being perpendicular to each other. For example, one acousto-optic deflector is placed vertically so that it can generate a one-dimensional light trap array perpendicular to the ground when it acts independently; and the other acousto-optic deflector is placed horizontally so that it can generate a one-dimensional light trap array parallel to the ground when it acts independently.

[0050] In the embodiment, time-sharing scanning modulation refers to cyclically inputting multiple set modulation frequencies and the duration of each modulation frequency into the acousto-optic deflector; the set modulation frequencies appear in sequence to form a modulation cycle, which is cyclically cycled; when the modulation cycle time is short, the naked eye cannot distinguish the flickering of the light spot, and the light spots appear to appear at the same time, thereby generating a special optical tweezers array with a special shape on a two-dimensional plane.

[0051] Multi-frequency function modulation refers to the simultaneous input of a modulation signal containing multiple radio frequencies into the acousto-optic deflector. The amplitude and phase of each radio frequency can be set independently. After passing through the acousto-optic crystal, each radio frequency corresponds to a different diffraction angle, presenting multiple light spots in the optical path.

[0052] In some embodiments, after the laser is shaped, it is sequentially sent to one of the acousto-optic deflectors, the conjugate optical path module and the other acousto-optic deflector for processing to generate a special optical tweezers array. The conjugate optical path module here can be a 4f optical path system composed of a pair of lenses, which is used to conjugate the light spot at a certain position to another position. By using the conjugate optical path module, the diffraction efficiency of the AOD can be increased, and stray light signals can be filtered out at the same time.

[0053] By adopting the method in the above embodiment, a special optical tweezers array in the shape of an octagon, an equilateral triangle, a parallelogram, an isosceles right triangle or other irregular shapes arranged by light spots can be generated by adopting time-sharing scanning modulation or time-sharing scanning and superposition modulation of multi-frequency functions; of course, based on the idea of ​​the present invention, the special arrays that can be generated are not limited to the shapes listed above, and they are not listed one by one here.

[0054] In some embodiments, the method for generating special optical tweezers of the present invention is described by taking the generation of an octagonal optical tweezers array as an example; the method comprises:

[0055] The laser beam is processed in sequence by using a first acousto-optic deflector and a second acousto-optic deflector which are arranged perpendicular to each other;

[0056] In a first preset time within a time-sharing scanning modulation cycle, applying radio frequency signals having a first frequency and a second frequency to the first acousto-optic deflector to perform multi-frequency function modulation, and applying radio frequency signals having a third frequency and a fourth frequency to the second acousto-optic deflector to perform multi-frequency function modulation;

[0057] In a second preset time within the time-sharing scanning modulation cycle, applying radio frequency signals having a third frequency and a fourth frequency to the first acousto-optic deflector to perform multi-frequency function modulation, and applying radio frequency signals having a first frequency and a second frequency to the second acousto-optic deflector to perform multi-frequency function modulation;

[0058] The modulation period is cycled in sequence according to the set time-sharing scanning to obtain an octagonal optical tweezers array.

[0059] In the above method, specifically, the time-sharing scanning modulation period is set to 16us;

[0060] In the first 8us of the time-sharing scanning modulation period, multi-frequency function modulation with frequencies of 92MHz and 98MHz is applied to the first acousto-optic deflector, and multi-frequency function modulation with frequencies of 94MHz and 96MHz is applied to the second acousto-optic deflector;

[0061] In the last 8us of the time-sharing scanning modulation period, multi-frequency function modulation with frequencies of 94MHz and 96MHz is applied to the first acousto-optic deflector, and multi-frequency function modulation with frequencies of 92MHz and 98MHz is applied to the second acousto-optic deflector;

[0062] Cycle in sequence to obtain Figure 2 The octagonal optical tweezers array is shown.

[0063] In some embodiments, the method for generating special optical tweezers of the present invention is described by taking the optical tweezer array for generating an isosceles right triangle as an example; the method includes:

[0064] The laser beam is processed in sequence by using a first acousto-optic deflector and a second acousto-optic deflector which are arranged perpendicular to each other;

[0065] In a third preset time within the time-sharing scanning modulation cycle, applying radio frequency signals having the fifth frequency and the sixth frequency to the first acousto-optic deflector to perform multi-frequency function modulation, and applying modulation having the fifth frequency to the second acousto-optic deflector;

[0066] In a fourth preset time within the time-sharing scanning modulation cycle, a modulation with a fifth frequency is applied to the first acousto-optic deflector, and a modulation with a sixth frequency is applied to the second acousto-optic deflector;

[0067] The isosceles right triangle optical tweezers array is obtained by cycling in sequence according to the set time-sharing scanning modulation cycle;

[0068] The fifth frequency and the sixth frequency use different frequencies.

[0069] Specifically, the time-sharing scanning modulation period is set to 16us;

[0070] In the first 8us of the time-sharing scanning modulation period, multi-frequency function modulation with frequencies of 92MHz and 96MHz is applied to the first acousto-optic deflector, and modulation with a frequency of 92MHz is applied to the second acousto-optic deflector;

[0071] In the last 8us of the time-sharing scanning modulation period, a modulation frequency of 92MHz is applied to the first acousto-optic deflector, and a modulation frequency of 96MHz is applied to the second acousto-optic deflector;

[0072] Cycle in sequence to obtain Figure 2 The optical tweezers array shown is in the shape of an isosceles right triangle.

[0073] In some embodiments, the method for generating special optical tweezers of the present invention is described by taking the generation of an equilateral triangle optical tweezer array as an example; the method comprises:

[0074] The laser beam is processed in sequence by using a first acousto-optic deflector and a second acousto-optic deflector which are arranged perpendicular to each other;

[0075] In a fifth preset time within the time-sharing scanning modulation cycle, the first acousto-optic deflector is modulated with the seventh frequency, and the second acousto-optic deflector is modulated with radio frequency signals with the seventh frequency and the eighth frequency respectively to perform multi-frequency function modulation;

[0076] In a sixth preset time in the time-sharing scanning modulation cycle, a modulation with a ninth frequency is applied to the first acousto-optic deflector, and a modulation with a tenth frequency is applied to the second acousto-optic deflector;

[0077] The equilateral triangle optical tweezers array is obtained by cycling in sequence according to the set time-sharing scanning modulation period;

[0078] Among them, the seventh frequency, the eighth frequency, the ninth frequency and the tenth frequency use different frequencies.

[0079] Specifically, the time-sharing scanning modulation period is set to 16us;

[0080] In the first 8us of the time-sharing scanning modulation period, a modulation frequency of 94MHz is applied to the first acousto-optic deflector, and a multi-frequency function modulation of frequencies of 94MHz and 98MHz is applied to the second acousto-optic deflector;

[0081] In the last 8us of the time-sharing scanning modulation period, a modulation frequency of 97.46MHz is applied to the first acousto-optic deflector, and a modulation frequency of 96MHz is applied to the second acousto-optic deflector;

[0082] Cycle in sequence to obtain Figure 2 The optical tweezers array shown is an equilateral triangle.

[0083] In some embodiments, the method for generating special optical tweezers of the present invention is described by taking the generation of a parallelogram optical tweezers array as an example; the method includes:

[0084] The laser beam is processed in sequence by using a first acousto-optic deflector and a second acousto-optic deflector which are arranged perpendicular to each other;

[0085] In the seventh preset time in the time-sharing scanning modulation cycle, the first acousto-optic deflector is modulated with the eleventh frequency, and the second acousto-optic deflector is modulated with radio frequency signals with the eleventh frequency and the twelfth frequency respectively to perform multi-frequency function modulation;

[0086] In an eighth preset time within the time-sharing scanning modulation cycle, the first acousto-optic deflector is modulated with a thirteenth frequency, and the second acousto-optic deflector is modulated with radio frequency signals with fourteenth and fifteenth frequencies, respectively, to perform multi-frequency function modulation;

[0087] The parallelogram optical tweezers array is obtained by cycling in sequence according to the set time-sharing scanning modulation period;

[0088] Among them, the eleventh frequency, the twelfth frequency, the thirteenth frequency, the fourteenth frequency, and the fifteenth frequency use different frequencies.

[0089] Specifically, the time-sharing scanning modulation period is set to 16us;

[0090] In the first 8us of the time-sharing scanning modulation period, a modulation frequency of 95MHz is applied to the first acousto-optic deflector, and a multi-frequency function modulation of frequencies of 95MHz and 98.77MHz is applied to the second acousto-optic deflector;

[0091] In the last 8us of the time-sharing scanning modulation period, a modulation frequency of 98.62MHz is applied to the first acousto-optic deflector, and a multi-frequency function modulation of frequencies of 96.89MHz and 100.66MHz is applied to the second acousto-optic deflector;

[0092] Cycle in sequence to obtain Figure 2 The optical tweezers array shown is in the shape of a parallelogram.

[0093] Based on the technical idea of ​​the present invention, a special optical tweezers array generation system capable of generating a special optical tweezers array is proposed.

[0094] In some embodiments, a special optical tweezers array generation system, referring to Figure 1 ,include:

[0095] An optical path system, the optical path system comprises a laser source 1, a beam processing module 2, a first acousto-optic deflector 3 (vertically placed with reference to the ground), a conjugate optical path module 4 and a second acousto-optic deflector 5 (horizontally placed with reference to the ground) sequentially arranged along the optical path, wherein the first acousto-optic deflector 3 and the second acousto-optic deflector 5 are arranged perpendicular to each other;

[0096] The modulation system is used to perform time-sharing scanning modulation or time-sharing scanning and superposition modulation of multi-frequency functions on the first acousto-optic deflector and the second acousto-optic deflector respectively; the time-sharing scanning modulation is to input multiple set modulation frequencies and the duration of each modulation frequency to the acousto-optic deflector in a cyclic manner in sequence; the multi-frequency function modulation is to input a modulation signal containing multiple radio frequencies to the acousto-optic deflector at the same time, and the amplitude and phase of each radio frequency can be set independently. After passing through the acousto-optic crystal, each radio frequency corresponds to a different diffraction angle, presenting multiple light spots in the optical path.

[0097] The beam processing module may employ a beam diameter adjustment optical device for adjusting the diameter of the laser beam.

[0098] The specific manner in which the modulation system controls the modulation of the first acousto-optic deflector and the second acousto-optic deflector to generate the required special optical tweezers array has been described in detail above and will not be repeated here.

[0099] Reference Figure 1In some embodiments, the modulation system includes a control unit 10 and a first radio frequency signal unit 8 and a second radio frequency signal unit 9 connected to the first acousto-optic deflector and the second acousto-optic deflector respectively;

[0100] The control unit applies radio frequency signals of corresponding frequencies to the first acousto-optic deflector and the second acousto-optic deflector respectively through the first radio frequency signal unit and the second radio frequency signal unit, and performs time-sharing scanning modulation or time-sharing scanning and superposition modulation of multi-frequency functions on the first acousto-optic deflector and the second acousto-optic deflector respectively.

[0101] The control unit can adopt a computer with integrated corresponding control program, and based on the set control program, control the first RF signal unit and the second RF signal unit to respectively output corresponding modulated RF signals, which are input through the RF ends of the first acousto-optic deflector and the second acousto-optic deflector to realize modulation of the first acousto-optic deflector and the second acousto-optic deflector.

[0102] Reference Figure 1 In some embodiments, the optical path system further includes a reflector 6 arranged at an angle of 45° along the optical path direction, and the reflector 6 is used to reflect the obtained special optical tweezers array to the CCD camera 7.

[0103] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship commonly placed when the product of the invention is used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0104] In addition, if the terms "horizontal" or "vertical" appear in the description of the present invention, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0105] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0106] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for generating a special optical tweezers array, characterized in that: Two mutually perpendicular acousto-optic deflectors are used to process the laser beam in turn, and the two acousto-optic deflectors are respectively subjected to time-sharing scanning modulation or time-sharing scanning and superposition modulation of multi-frequency functions to generate a special optical tweezers array on a two-dimensional plane; The time-sharing scanning modulation is to cyclically input a plurality of set modulation frequencies and the duration of each modulation frequency into the acousto-optic deflector in sequence; Multi-frequency function modulation is to simultaneously input a modulation signal containing multiple radio frequencies into the AOD, and the amplitude and phase of each radio frequency can be set independently.

2. The method for generating a special optical tweezers array according to claim 1, characterized in that: After shaping, the laser is sequentially sent to one of the acousto-optic deflectors, the conjugate optical path module and another acousto-optic deflector for processing to generate a special optical tweezers array.

3. The method for generating a special optical tweezers array according to claim 1, characterized in that: The special optical tweezers array generated is an octagon, equilateral triangle, parallelogram, isosceles right triangle or other irregular shapes arranged by light spots.

4. A method for generating a special optical tweezers array, characterized in that: The laser beam is processed in sequence by using a first acousto-optic deflector and a second acousto-optic deflector which are arranged perpendicular to each other; In a first preset time within a time-sharing scanning modulation cycle, applying radio frequency signals having a first frequency and a second frequency to the first acousto-optic deflector to perform multi-frequency function modulation, and applying radio frequency signals having a third frequency and a fourth frequency to the second acousto-optic deflector to perform multi-frequency function modulation; In a second preset time within the time-sharing scanning modulation cycle, applying radio frequency signals having a third frequency and a fourth frequency to the first acousto-optic deflector to perform multi-frequency function modulation, and applying radio frequency signals having a first frequency and a second frequency to the second acousto-optic deflector to perform multi-frequency function modulation; The octagonal optical tweezers array is obtained by cycling in sequence according to the set time-sharing scanning modulation period; The first frequency, the third frequency, the second frequency and the fourth frequency are distributed in an arithmetic progression.

5. A method for generating a special optical tweezers array, characterized in that: The laser beam is processed in sequence by using a first acousto-optic deflector and a second acousto-optic deflector which are arranged perpendicular to each other; In a third preset time within the time-sharing scanning modulation cycle, applying radio frequency signals having the fifth frequency and the sixth frequency to the first acousto-optic deflector to perform multi-frequency function modulation, and applying modulation having the fifth frequency to the second acousto-optic deflector; In a fourth preset time within the time-sharing scanning modulation cycle, a modulation with a fifth frequency is applied to the first acousto-optic deflector, and a modulation with a sixth frequency is applied to the second acousto-optic deflector; The isosceles right triangle optical tweezers array is obtained by cycling in sequence according to the set time-sharing scanning modulation cycle; The fifth frequency and the sixth frequency use different frequencies.

6. A method for generating a special optical tweezers array, characterized in that: The laser beam is processed in sequence by using a first acousto-optic deflector and a second acousto-optic deflector which are arranged perpendicular to each other; In a fifth preset time within the time-sharing scanning modulation cycle, the first acousto-optic deflector is modulated with the seventh frequency, and the second acousto-optic deflector is modulated with radio frequency signals with the seventh frequency and the eighth frequency respectively to perform multi-frequency function modulation; In a sixth preset time in the time-sharing scanning modulation cycle, a modulation with a ninth frequency is applied to the first acousto-optic deflector, and a modulation with a tenth frequency is applied to the second acousto-optic deflector; The equilateral triangle optical tweezers array is obtained by cycling in sequence according to the set time-sharing scanning modulation period; Among them, the seventh frequency, the eighth frequency, the ninth frequency and the tenth frequency use different frequencies.

7. A method for generating a special optical tweezers array, characterized in that: The laser beam is processed in sequence by using a first acousto-optic deflector and a second acousto-optic deflector which are arranged perpendicular to each other; In the seventh preset time in the time-sharing scanning modulation cycle, the first acousto-optic deflector is modulated with the eleventh frequency, and the second acousto-optic deflector is modulated with radio frequency signals with the eleventh frequency and the twelfth frequency respectively to perform multi-frequency function modulation; In an eighth preset time within the time-sharing scanning modulation cycle, the first acousto-optic deflector is modulated with a thirteenth frequency, and the second acousto-optic deflector is modulated with radio frequency signals with fourteenth and fifteenth frequencies, respectively, to perform multi-frequency function modulation; The parallelogram optical tweezers array is obtained by cycling in sequence according to the set time-sharing scanning modulation period; Among them, the eleventh frequency, the twelfth frequency, the thirteenth frequency, the fourteenth frequency, and the fifteenth frequency use different frequencies.

8. A special optical tweezers array generation system, characterized in that: include: An optical path system, the optical path system comprising a laser source, a beam processing module, a first acousto-optic deflector, a conjugate optical path module and a second acousto-optic deflector sequentially arranged along the optical path, wherein the first acousto-optic deflector and the second acousto-optic deflector are arranged perpendicular to each other; A modulation system, the modulation system is used to perform time-sharing scanning modulation or time-sharing scanning and superposition modulation of multi-frequency functions on the first acousto-optic deflector and the second acousto-optic deflector respectively; the time-sharing scanning modulation is to cyclically input multiple set modulation frequencies and the duration of each modulation frequency to the acousto-optic deflector in sequence; Multi-frequency function modulation is to simultaneously input a modulation signal containing multiple radio frequencies into the AOD, and the amplitude and phase of each radio frequency can be set independently.

9. The special optical tweezers array generation system according to claim 8, characterized in that: The modulation system includes a control unit and a first radio frequency signal unit and a second radio frequency signal unit connected to the first acousto-optic deflector and the second acousto-optic deflector respectively; The control unit applies radio frequency signals of corresponding frequencies to the first acousto-optic deflector and the second acousto-optic deflector respectively through the first radio frequency signal unit and the second radio frequency signal unit, and performs time-sharing scanning modulation or time-sharing scanning and superposition modulation of multi-frequency functions on the first acousto-optic deflector and the second acousto-optic deflector respectively.

10. The special optical tweezers array generation system according to claim 8, characterized in that: The optical path system also includes a reflector, which is used to reflect the obtained special optical tweezers array to the CCD camera.

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