CN102222533A - Automatic assembly type photodynamic drill based on multi-core fiber - Google Patents
Automatic assembly type photodynamic drill based on multi-core fiber Download PDFInfo
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Abstract
The invention provides an automatic assembly type photodynamic drill based on multi-core fiber. The automatic assembly type photodynamic drill comprises front optical tweezers and a micro rotor formed by processed multi-core fiber. In solution the optical tweezers automatically captures the micro rotor to form a photodynamic drill. The micro rotor structure comprises a ball, a rotating shaft, a windmill like rotor structure composed of a plurality of wings and a cone tip, wherein the ball is at the top of the rotating shaft, the windmill like rotor structure composed of a plurality of wings is at the middle of the rotating shaft, and the cone tip is at the bottom of the rotating shaft. According to the invention, the micro rotor ball can automatically form a photodynamic drill once captured. The photodynamic drill has the advantages of convenient operation, simple structure, and easy control. The dimension of the photodynamic drill is micron-sized, and the rotating speed is easy to control from outside. The photodynamic drill can be applied to microbe punching such as cell wall punching. Accordingly, the automatic assembly type photodynamic drill based on multi-core fiber provides a strong tool for micro life science and biomedical researches.
Description
Technical field
What the present invention relates to is a kind of smooth power drill, specifically a kind of self assembly formula light power drill based on multi-core fiber.
Background technology
Photic rotation is the effective means that realizes the micromechanics motor, along with development of science and technology, and processes technology and development of computer, the application prospect of photic rotation is with increasingly extensive, the method of photic rotation not only can be applied to serves as stirrer in the micro-total analysis system, can also be applied in the Micropump, also can be used for studying microscopic property, cell membrane shearing force, little brill of rotation motor albumen, fluid etc., therefore, the further investigation of this technology provides a kind of strong tool for little life science and biomedicine.
1936, the half-wave plate that R.A.Beth allows a branch of circularly polarized light hang by filament experimentally, utilize the angular momentum of photon in the light beam to realize rotation (the Beth R A.Mechanical detection and measurement of the angualarmomentum of light.Phys.Rev. of object first, 1936,50:115-125).The method that realizes photic rotation of exploring that people are not stopping always since then.Since having proposed " light tweezer ", people such as Askin in 1986 realized the three dimensions of particle is controlled (Ashkin, J.M.Dziedzic, J.E.Bjorkholm, S.Chu.Observation of a single-beam gradient force opticaltrap for dielectric particles.Opt.Lett.1986,11,288-290.), also promoted the development of photic rotation simultaneously.Up to the present realize the following several modes of the main employing of optical drive rotation: first kind of mode is to utilize spin angular momentum to realize rotation; The second way is to utilize orbital angular momentum to realize rotation; The third mode is to utilize the linear momentum of light to realize rotation, design and produce microdevice with given configuration structure, utilize device interactions such as the reflection of light beam, refraction, absorption to be realized rotation (the Galajda P of device, Ormos P.Complex Micromachines Produced and Driven by Light.Appl.Phys.Lett.2001,78 (2): 249-251).Utilize the third mode to realize that the research of rotating is many, because the rotating speed and the direction of particulate can artificially be controlled, and utilize two-photon polymerized technology to process to be suitable for any tridimensional micro part of optical drive, it is more flexible to make that this experimental technique implements, therefore, there is more researchist to be devoted to motors designs research and improvement at present.
The Ormos group of Hungary academy of sciences has also done number of research projects in this respect, the rotor that has proposed multiple special shape is also verified by experiment, utilize laser optical tweezer to capture and drive the rotor of helical structure, comprise propeller shape, spiral yarn shaped, water sprinkler shape, contrasting under the same conditions through experimental verification, the propeller shape rotor can obtain higher rotating speed, the power of 10mw can reach several hertz speed of rotation (Peter Galajda down, Pal Ormos.Rotation of microscopic propellers in lasertweezers.Journal of Optics B:Quantum and Semiclassical Optics 2002,4 (2), pp.S78-S81); In order to obtain continuous Spin Control mode, after the laser optical tweezer that people such as Ormos are produced linearly polarized light according to flat particle is captured rotation, sense of rotation is consistent with the plane of polarization direction, therefore designed that to have xsect be cross gear particle, though sense of rotation is easy to control, the torsional moment that produces under the identical condition is less; In addition, in order to obtain better experiment results, Ormos and his colleague propose again a plurality of rotor combination formative gears are driven device, utilize center rotor to rotate and drive other rotor.Consider the complicacy of laser optical tweezer device, under using, some use the waveguide optical drive more useful, especially in micro-fluidic system, so they have proposed integrated system again, comprise the light rotor, optical axis and the optical waveguide of utilizing two-photon polymerized method to form, waveguide optical input power 10mw can produce the 2rps speed of rotation.
Japan Ukita group of Ritsumeikan University, multiple rotor structure such as simple shuttlecock shape have also been proposed, the shuttlecock shape that has the inclined-plane, comprising three wings, four wings and a plurality of wing and the cylindrical rotor (H.Ukita that has ramp structure, M.Kanehira.Ashuttlecock optical rotor-Its design, fabrication and evaluation for a micro-fluidic mixer.IEEEJournal of Selected Topics in Quantum Electronics on Optical MEMS, 8, pp.111-117,2002.), by Theoretical Calculation luminous power square and viscous resistance, and verify by experiment.These rotor structures all can be realized stablizing and capture, high speed rotating; Each parameter by Theoretical Calculation and emulation light beam such as light intensity, numerical aperture, focal length etc. are to the rotating speed influence of rotor simultaneously, thereby have optimized beam characteristics and rotor structure.People such as Ukita consider the influence of viscosity resistance in the micro-fluidic system, have proposed to make in the side of the rotor that has the inclined-plane cylindrically can reduce viscosity resistance, thereby have obtained higher rotating speed and performance.In order in micro-fluidic system, to give full play to the effect of stirrer, they have proposed to realize by the position of displacement laser optical tweezer ligh trap the counterclockwise and clockwise variation of rotor again, at first two rotors that have three wings are coupled together, through laser radiation integral body, the rotating speed of acquisition is 2 times of single rotor.Based on this design concept, people such as Shoii Maruo have also designed a kind of composite fabricated rotor, two rotors that will have the reverse direction wing connect, and at cylindrical jacket of two rotor outside covers, purpose is to fix two rotors and reduce viscosity resistance, focuses the laser beam to the centre of two rotors then, makes that the light pressure direction that affacts the rotor wing is identical, therefore increase the light torsional moment, can obtain high rotational speed.
The Vincent L.Y.Loke of Queensland university for light motor better application in biologic applications, can control the flow direction and the position of sample solution at any time, design and utilize two-photon polymerized technology to prepare shape and be similar to the middle blade-carrying rotor of dumbbell shaped, under multiple beam drives, realize rotating, obtained higher stirring efficiency.(Gregor
SimonParkin, Timo A.Nieminen, Vincent L.Y.Loke, Norman R.Heckenberg, and Halina Rubinsztein-DunlopIntegrated optomechanical microelements.Optics Express, 2007,15 (9), pp.5521-5530) in order to obtain better experiment effect, the multiple mode that they propose to produce torsional moment combines, at first with the combination of two rotors, utilize the light beam that has angular momentum to shine then and obtain comparatively ideal result.
Yellow civilian great group of Chinese University of Science and Technology utilizes the two-photon polymerized effect of a kind of propenoic acid ester photocureable material S-3, processing diameter in the femtosecond laser microfabrication system of development voluntarily is 6 microns the little rotor of fylfot, and the photic rotation of 200rpm (is wished stable when utilizing light forceps device to realize laser power 50mW, Liu Yuxiang, Guo Rui, Xiao Shizhou, Huang Wenhao. a kind of Laser Processing of miniature rotor and photic rotation. photoelectric project .2006 (33): 10-13), the method of several calculating light moments of torsion has also been proposed simultaneously, and utilizing this method that several special rotor that Ormos group once designed has been carried out Theoretical Calculation, the result who obtains conforms to substantially with experiment.
There are many universities in the whole world according to " rotation of class windmill " principle, in the rotor shapes design, done more research, obtained bigger progress and achievement in research preferably, can not stable rotation but still exist such as rotor, restrictions such as drive unit make range of application limited.
Summary of the invention
The object of the present invention is to provide a kind of easy to operate, simple in structure, easy to control, the self assembly formula light power drill that rotating speed is controlled by the external world based on multi-core fiber.
The object of the present invention is achieved like this: comprise light tweezer and little rotor that the multi-core fiber of front end after processing forms, front end constitutes the light power drill through the light tweezer that the multi-core fiber after the processing forms is captured little rotor automatically in solution after; " class windmill " rotor structure and cone tip that described little rotor structure comprises spheroid, turning axle, is made of a plurality of wings, spheroid is positioned at the turning axle top, " class windmill " rotor structure that is made of a plurality of wings is positioned at the turning axle middle part, and the cone tip is positioned at the turning axle bottom.
The present invention can also comprise some architectural features like this:
1, " class windmill " rotor structure of constituting of the described a plurality of wing comprises 3-6 the wing, and each wing is the column on inclined-plane above being.
2, the outer end of each wing has semicolumn.
3, the multi-core fiber of described front end after processing is that the multi-core fiber front end is formed chamfering α behind precise finiss processing or fused biconical taper, the satisfied pi/2-arcsin (n that concerns of chamfering α
Liquid/ n
Core)＜α＜pi/2 forms the optics potential well and captures little rotor spheroid.
4, the fibre core geometric distributions of described multi-core fiber is to be three core fibres of equilateral triangle distribution or to be square profile four-core optical fiber.
5, for can producing moment of torsion with interactions such as beam reflection, refraction, absorptions, the rotor structure that has three wings or a plurality of wings realizes rotation in the middle part of described little rotor.Described little two ends of rotor is symmetrical spheroid, turning axle, and middle is that the rotor structure that has three wings or a plurality of wings can produce moment of torsion realization rotation with interactions such as beam reflection, refraction, absorptions.
The invention provides a kind of self assembly formula light power drill based on multi-core fiber of novelty, it constitutes light power drill system after mainly capturing the spheroid of little rotor automatically through the light tweezer that the multi-core fiber after the retrofit forms by front end in solution voluntarily; Little rotor structure comprises that top spheroid, turning axle, connection have " class windmill " rotor structure of a plurality of wings of inclined-plane and semicolumn, and the bottom is the cone tip; After wherein the front end of multi-core fiber was captured spheroid, when playing the dead axle effect, the emergent light vertical irradiation was realized rotation to the wing that has the inclined-plane, drives the effect that the light power drill is played in bottom cone rotation simultaneously.Because in a single day little rotor spheroid is captured capable of automatic assembling for the light power drill, easy to operate, simple in structure, easy to control, and the light power drill is of a size of micron order, and rotating speed is controlled by the external world, can be widely applied in the microorganism punching to hole as cell membrane.Therefore, provide a kind of strong tool for little life science and biomedical research.
The present invention has following characteristics:
1, the invention provides a kind of novel self assembly formula light power drill based on multi-core fiber, form the optics potential well after utilizing multi-core fiber through precise finiss processing or fused biconical taper and capture little rotor, volume is little, saved physical space, processing ease, it is big to control scope, simple in structure, can realize that artificial outside controls.
2, in a single day little rotor spheroid is captured, and emergent light shines the wing that has the inclined-plane simultaneously, realizes rotation, drives the effect that the light power drill is played in bottom cone rotation simultaneously, has realized that self assembly joins.
3, the light power drill is of a size of micron order, and rotating speed is controlled by the external world, can be widely applied in the microorganism punching to hole as cell membrane.Therefore, provide a kind of strong tool for little life science and biomedical research.
Description of drawings
Fig. 1 is based on the self assembly formula light power drill synoptic diagram of multi-core fiber;
The multi-core fiber synoptic diagram of Fig. 2 fine gtinding processing;
Multi-core fiber structural representation behind Fig. 3 fused biconical taper;
Fig. 4 multi-core fiber fused biconical taper synoptic diagram;
Fig. 5 three core fibre cross sectional representation;
Fig. 6 four-core cross section of optic fibre synoptic diagram;
The little rotor structure synoptic diagram of Fig. 7
The little rotor top view of Fig. 8;
The little rotor front view of Fig. 9.
Embodiment
Is that example is done description in more detail to the present invention below in conjunction with accompanying drawing with three core fibres:
In conjunction with Fig. 1,3, it constitutes light power drill system after mainly capturing the spheroid of little rotor 5 automatically through the light tweezer 4 that the multi-core fiber after the retrofit 1 forms by front end in solution voluntarily; In conjunction with Fig. 7-9, little rotor structure comprises that top spheroid, turning axle, connection have " class windmill " rotor structure of a plurality of wings of inclined-plane and semicolumn simultaneously, and the bottom is the cone tip; After wherein the front end of multi-core fiber was captured spheroid, when playing the dead axle effect, the emergent light vertical irradiation was realized rotation to the wing that has the inclined-plane, drives the effect that the light power drill is played in bottom cone rotation simultaneously.The multi-core fiber of described front end after retrofit, be with the multi-core fiber front end behind precise finiss processing or fused biconical taper, chamfering α satisfies and concerns pi/2-arcsin (n
Liquid/ n
Core)＜α＜pi/2 forms the optics potential well and captures little rotor spheroid.The fibre core geometric distributions of described multi-core fiber is to be three core fibres of equilateral triangle distribution and to be square profile four-core optical fiber.Rotation is realized for the rotor structure that has three wings or a plurality of wings can produce moment of torsion with interactions such as beam reflection, refraction, absorptions in described little rotor middle part.Described little two ends of rotor is symmetrical spheroid, turning axle, and middle is that the rotor structure that has three wings or a plurality of wings can produce moment of torsion realization rotation with interactions such as beam reflection, refraction, absorptions.
Illustrate manufacturing process of the present invention below:
Manufacturing process gives an example 1:
1, grinding the cone multi-core fiber makes: get one section fibre core, three core fibres, 1 front end that is equilateral triangle that distributes and carry out fine gtinding, become cone shape 4, in order to guarantee can to form cross one another beam combination after emergent light is through the circular conical surface refraction, semi-cone angle α is controlled at pi/2-arcsin (n
Liquid/ n
CoreIn the scope of)＜α＜pi/2.For fiber core refractive index n
Core=1.4868, cladding index n
Cladding=1.4571 and the residing liquid refractivity n of optical fiber optical tweezers
WaterUnder=1.333 the situation, the scope of this semi-cone angle should be controlled between 26.3 °-90 °;
2, cone polishing: above-mentioned ground optical fiber cone is polished, after microscopically is qualified through detection, be placed on cleaning, dry for standby in the ultrasonic cleaning tank;
3, the processing of little rotor: wherein the processing of fine particle as shown in Figure 7, the model of designing institute demand in CAD at first, the application program that has designed according to CAD then, be converted into the instruction that controller can be discerned, utilize the software control system of computing machine to control the break-make of the precise motion and the optical gate of three-dimensional shifting axle again, realize the selective processing of femtosecond laser, this moment, femtosecond laser collimation back was from microscope left side incident, through after the mirror reflects, being shown the speck mirror by 100 focuses in the photosensitive resin, photosensitive resin is positioned at surface of glass slide, slide is fixed on the three-dimensional shifting axle, thereby in photosensitive resin, make the 3 D stereo micro element, unexposed material dissolution with solvents, just obtaining required curing three-dimensional microstructures is designed little rotor.
Manufacturing process gives an example 2:
1, the cone multi-core fiber behind the fused biconical taper is made: in conjunction with Fig. 3,4, the optical fiber end of three core fibres 1 is carried out fused biconical taper, be heated to soft state, draw awl then, the fibre core spacing of multi-core fiber is controlled at pi/2-arcsin (n from along with drawing pitch cone radius to dwindle from proportional until semi-cone angle α
Liquid/ n
CoreStop to draw awl in the scope of)＜α＜pi/2.For fiber core refractive index n
Core=1.4868, cladding index n
Cladding=1.4571 and the residing liquid refractivity n of optical fiber optical tweezers
WaterUnder=1.333 the situation, the scope of this semi-cone angle should be controlled between 26.3 °-90 °;
2, the processing of little rotor: wherein the processing of fine particle as shown in Figure 7, the model of designing institute demand in CAD at first, the application program that has designed according to CAD then, be converted into the instruction that controller can be discerned, utilize the software control system of computing machine to control the break-make of the precise motion and the optical gate of three-dimensional shifting axle again, realize the selective processing of femtosecond laser, this moment, femtosecond laser collimation back was from microscope left side incident, through after the mirror reflects, being shown the speck mirror by 100 focuses in the photosensitive resin, photosensitive resin is positioned at surface of glass slide, slide is fixed on the three-dimensional shifting axle, thereby in photosensitive resin, make the 3 D stereo micro element, unexposed material dissolution with solvents, just obtaining required curing three-dimensional microstructures is designed little rotor.
Claims (6)
1. self assembly formula light power drill based on multi-core fiber, it is characterized in that: comprise light tweezer and little rotor that the multi-core fiber of front end after processing forms, front end constitutes the light power drill through the light tweezer that the multi-core fiber after the processing forms is captured little rotor automatically in solution after; " class windmill " rotor structure and cone tip that described little rotor structure comprises spheroid, turning axle, is made of a plurality of wings, spheroid is positioned at the turning axle top, " class windmill " rotor structure that is made of a plurality of wings is positioned at the turning axle middle part, and the cone tip is positioned at the turning axle bottom.
2. the self assembly formula light power drill based on multi-core fiber according to claim 1 is characterized in that: " class windmill " rotor structure that the described a plurality of wings constitute comprises 3-6 the wing, and each wing is the column on inclined-plane above being.
3. the self assembly formula light power drill based on multi-core fiber according to claim 2, it is characterized in that: the outer end of each wing has semicolumn.
4. according to claim 1,2 or 2 described self assembly formula light power drills based on multi-core fiber, it is characterized in that: the multi-core fiber of described front end after processing, be that the multi-core fiber front end is formed chamfering α behind precise finiss processing or fused biconical taper, the satisfied pi/2-arcsin (n that concerns of chamfering α
Liquid/ n
Core)＜α＜pi/2 forms the optics potential well and captures little rotor spheroid.
5. according to claim 1,2 or 3 described self assembly formula light power drills based on multi-core fiber, it is characterized in that: the fibre core geometric distributions of described multi-core fiber is to be three core fibres of equilateral triangle distribution or to be square profile four-core optical fiber.
6. the self assembly formula light power drill based on multi-core fiber according to claim 4 is characterized in that: the fibre core geometric distributions of described multi-core fiber is to be three core fibres of equilateral triangle distribution or to be square profile four-core optical fiber.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108267815A (en) * | 2018-02-09 | 2018-07-10 | 哈尔滨工业大学 | The micronano optical motor and its driving method coupled based on waveguide with resonator |
| CN113687469A (en) * | 2021-08-26 | 2021-11-23 | 桂林电子科技大学 | Multifunctional optical fiber micro-impact gun tool |
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| CN108267815A (en) * | 2018-02-09 | 2018-07-10 | 哈尔滨工业大学 | The micronano optical motor and its driving method coupled based on waveguide with resonator |
| CN108267815B (en) * | 2018-02-09 | 2019-12-13 | 哈尔滨工业大学 | micro-nano optical motor based on coupling of waveguide and resonant cavity and driving method thereof |
| CN113687469A (en) * | 2021-08-26 | 2021-11-23 | 桂林电子科技大学 | Multifunctional optical fiber micro-impact gun tool |
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