CN102841219A - Multi-beam optical trap rigidity calibration device and method - Google Patents
Multi-beam optical trap rigidity calibration device and method Download PDFInfo
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- CN102841219A CN102841219A CN201210322842XA CN201210322842A CN102841219A CN 102841219 A CN102841219 A CN 102841219A CN 201210322842X A CN201210322842X A CN 201210322842XA CN 201210322842 A CN201210322842 A CN 201210322842A CN 102841219 A CN102841219 A CN 102841219A
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Abstract
The invention discloses a multi-beam optical trap rigidity calibration device and method. The multi-beam optical trap rigidity calibration device comprises an indexing table, an optical fiber optical trap system substrate, trapped particles, an isolator and laser devices. The indexing table is provided with the optical fiber optical trap system substrate on which particles to be trapped are carried, and laser emitted by two laser devices is connected with relative optical fiber fixed by the optical fiber optical trap system substrate through the isolator and by an optical fiber; finally, the laser illuminates on the particles to be trapped and an optical trap is generated. A multi-beam optical trap is provided with a small external force by adopting a residual gravity method and the displacement of a balance position and the residual gravity are measured, so that the rigidity of the optical trap is calibrated. The multi-beam optical trap has the characteristics of high sensitivity and small rigidity which can meet the requirements. Traditional rigidity measuring methods are no longer suitable for calibrating such accelerometer rigidity. The method is suitable for calibrating optical trap rigidity generated by the scattering force and the gradient force of the laser.
Description
Technical field
The invention belongs to the inertial navigation system field, be specifically related to a kind of multiple beam ligh trap rigidity caliberating device and method thereof.
Background technology
The rigidity of accelerometer is an important indicator that characterizes the acceleration performance.The multiple beam ligh trap has very low rigidity, generally adopts the towing method or utilizes Brownian movement to demarcate the rigidity of ligh trap.The Brownian movement method is subject to the influence of external disturbance; The towing method needs position sensor to have very high temporal resolution and spatial resolution; Adopt remaining gravitational method to demarcate ligh trap rigidity and neither be subject to external interference, and use common CCD can realize the demarcation of ligh trap rigidity.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of multiple beam ligh trap rigidity caliberating device and method thereof are provided.
Multiple beam ligh trap rigidity caliberating device comprises the substrate of circular dividing table, fiber-optic trap system, captive particulate, isolator, laser instrument; Circular dividing table is provided with the substrate of fiber-optic trap system, and the substrate uploading of fiber-optic trap system remains captive particulate, the laser that two-laser sends through isolator through optical fiber and link to each other by the right optical fiber of the substrate stationary phase of fiber-optic trap system; Shine at last and treat on the captive particulate, produce ligh trap.
Substrate, isolator, the laser instrument of described fiber-optic trap system connect to form the fiber-optic trap system by optical fiber; The on-chip center of described fiber-optic trap system is provided with " ten " font groove, and is fixed with the substrate that two groups of vertically opposite each other optical fiber constitute the fiber-optic trap systems.
Multiple beam ligh trap rigidity scaling method is: will treat that captive particulate places liquid; Density of liquid is less than the density of particulate; Through ligh trap with captive particle capture a stable position, when the substrate of fiber-optic trap system had the variation at an inclination angle, the direction of captive particulate at the inclination angle received the influence of remaining gravity and is subjected to displacement; Once more during balance, ligh trap power and remaining gravitational equilibrium; Because ligh trap power is linear at one among a small circle,, calibrate the rigidity of ligh trap through measuring the displacement of particulate under the different angle;
The concrete steps of the demarcation of multiple beam ligh trap rigidity are following:
Step 1, assemble the fiber-optic trap system, the substrate of fiber-optic trap system is fixed on the circular dividing table 1, in " ten " font groove, splash into liquid, place microscopically to observe, make and to see " ten " font groove center clearly;
Step 2, will wait to be obtained in " ten " word groove that particulate splashes into fiber-optic trap system substrate, open laser, and confirm to wait to be hunted down particulate by beam-capturing;
Step 3, open microscopical video recording, record 5 minutes video; With circular dividing table rotational angle
, record 5 minutes video again;
The method of step 4, employing Video processing, the video that treatment step three obtains draws circular dividing table and rotates the displacement of front and back particulate with respect to fiber end face.
Described fiber-optic trap system's employing twin-beam ligh trap or four light beam ligh traps.The said particulate that is hunted down is ps particle, silit or silicon dioxide microparticle.Described solution is deionized water, KOH solution or NaCl solution.
The present invention adopts the method for remaining gravity, for the multiple beam ligh trap provides small external force, through the displacement of measurement equilibrium position and the size of remaining gravity, the rigidity of demarcating ligh trap.The multiple beam ligh trap has highly sensitive; The characteristics that rigidity is little; Its rigidity can reach
, and the method for traditional measurement rigidity no longer is applicable to the demarcation of this accelerometer rigidity.This method is applicable to the rigidity of demarcation by the ligh trap that scattering force and gradient force produced of laser.
Description of drawings
Fig. 1 is a multiple beam ligh trap rigidity caliberating device structural representation;
Fig. 2 is the substrate structure synoptic diagram of fiber-optic trap of the present invention system;
Fig. 3 is multiple beam ligh trap rigidity calibration principle figure.
Embodiment
Like Fig. 1, shown in 2, multiple beam ligh trap rigidity caliberating device comprises substrate 2, captive particulate 3, isolator 4, the laser instrument 5 of circular dividing table 1, fiber-optic trap system; Circular dividing table 1 is provided with the substrate 2 of fiber-optic trap system, and the substrate 2 of fiber-optic trap system is uploaded and remained captive particulate 3, and the laser that two-laser 5 sends links to each other with the right optical fiber of substrate 2 stationary phase by the fiber-optic trap system through optical fiber through isolator 4; Shine at last and treat on the captive particulate 3, produce ligh trap.
Substrate 2, isolator 4, the laser instrument 5 of described fiber-optic trap system connect to form the fiber-optic trap system by optical fiber; Center on the substrate 2 of described fiber-optic trap system is provided with " ten " font groove, and is fixed with the substrate that two groups of vertically opposite each other optical fiber constitute the fiber-optic trap systems.
Multiple beam ligh trap rigidity scaling method is: will treat that captive particulate 3 places liquid; Density of liquid is less than the density of particulate; Through ligh trap captive particulate 3 is captured in a stable position, when the substrate 2 of fiber-optic trap system had the variation at an inclination angle, the direction of captive particulate 3 at the inclination angle received the influence of remaining gravity and is subjected to displacement; Once more during balance, ligh trap power and remaining gravitational equilibrium; Because ligh trap power is linear at one among a small circle,, calibrate the rigidity of ligh trap through measuring the displacement of particulate under the different angle;
The concrete steps of the demarcation of multiple beam ligh trap rigidity are following:
Step 1, assemble the fiber-optic trap system, the substrate 2 of fiber-optic trap system is fixed on the circular dividing table 1, in " ten " font groove, splash into liquid, place microscopically to observe, make and to see " ten " font groove center clearly;
Step 2, will wait to be obtained in " ten " word groove that particulate 3 splashes into fiber-optic trap system substrate, open laser 5, and confirm to wait to be hunted down particulate 3 by beam-capturing;
Step 3, open microscopical video recording, record 5 minutes video; With circular dividing table 1 rotational angle
, record 5 minutes video again;
The method of step 4, employing Video processing, the video that treatment step three obtains draws circular dividing table 1 and rotates the displacement of front and back particulate with respect to fiber end face.
Described fiber-optic trap system's employing twin-beam ligh trap or four light beam ligh traps.The said particulate 3 that is hunted down is ps particle, silit or silicon dioxide microparticle.Described solution is deionized water, KOH solution or NaCl solution.
It is following to utilize the present invention to demarcate the principle of multiple beam ligh trap rigidity:
As shown in Figure 3, initial substrate is vertical with vertical direction; Particle is owing in being immersed in the liquid, only remain 0.05 remaining gravity.When turning over angle
; Remaining gravity is
at axial component; When particle-stabilised, axially satisfying:
Wherein
is the power of catching, and
is the quality of particle.
If particulate is s with respect to the displacement of fiber end face before and after the inclination of extracting through video, then can obtains ligh trap stiffness Calculation formula and be:
。
Claims (6)
1. a multiple beam ligh trap rigidity caliberating device is characterized in that comprising the substrate (2) of circular dividing table (1), fiber-optic trap system, captive particulate (3), isolator (4), laser instrument (5); Circular dividing table (1) is provided with the substrate (2) of fiber-optic trap system; The substrate of fiber-optic trap system (2) is uploaded and is remained captive particulate (3), and the laser that two-laser (5) sends links to each other with the right optical fiber of substrate (2) stationary phase by the fiber-optic trap system through optical fiber through isolator (4); Shine at last and treat on the captive particulate (3), produce ligh trap.
2. a kind of multiple beam ligh trap rigidity caliberating device according to claim 1 is characterized in that substrate (2), isolator (4), the laser instrument (5) of described fiber-optic trap system connects to form the fiber-optic trap system by optical fiber; Center on the substrate (2) of described fiber-optic trap system is provided with " ten " font groove, and is fixed with the substrate that two groups of vertically opposite each other optical fiber constitute the fiber-optic trap systems.
3. multiple beam ligh trap rigidity scaling method that use is installed according to claim 1 or claim 2; It is characterized in that: will treat that captive particulate (3) places liquid; Density of liquid is less than the density of particulate; Through ligh trap captive particulate (3) is captured in a stable position, when the substrate (2) of fiber-optic trap system had the variation at an inclination angle, the direction of captive particulate (3) at the inclination angle received the influence of remaining gravity and is subjected to displacement; Once more during balance, ligh trap power and remaining gravitational equilibrium; Because ligh trap power is linear at one among a small circle,, calibrate the rigidity of ligh trap through measuring the displacement of particulate under the different angle;
The concrete steps of the demarcation of multiple beam ligh trap rigidity are following:
Step 1, assemble the fiber-optic trap system, the substrate (2) of fiber-optic trap system is fixed on the circular dividing table (1), in " ten " font groove, splash into liquid, place microscopically to observe, make and to see " ten " font groove center clearly;
Step 2, will wait to be obtained in " ten " word groove that particulate (3) splashes into fiber-optic trap system substrate, open laser (5), confirm that particulate to be hunted down (3) is by beam-capturing;
Step 3, open microscopical video recording, record 5 minutes video; With circular dividing table (1) rotational angle, record 5 minutes video again;
The method of step 4, employing Video processing, the video that treatment step three obtains draws circular dividing table 1 and rotates the displacement of front and back particulate with respect to fiber end face.
4. a kind of multiple beam ligh trap rigidity scaling method as claimed in claim 1 is characterized in that: described fiber-optic trap system's employing twin-beam ligh trap or four light beam ligh traps.
5. a kind of multiple beam ligh trap rigidity scaling method as claimed in claim 1, it is characterized in that: the said particulate that is hunted down (3) is ps particle, silit or silicon dioxide microparticle.
6. a kind of multiple beam ligh trap rigidity scaling method as claimed in claim 1, it is characterized in that: described solution is deionized water, KOH solution or NaCl solution.
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| CN201210322842.XA CN102841219B (en) | 2012-09-04 | 2012-09-04 | Multi-beam optical trap rigidity calibration device and method |
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| CN201210322842.XA CN102841219B (en) | 2012-09-04 | 2012-09-04 | Multi-beam optical trap rigidity calibration device and method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759073A (en) * | 2016-03-07 | 2016-07-13 | 浙江大学 | Full-closed type light trap sensing control unit and manufacturing method therefor |
| CN104034322B (en) * | 2014-06-19 | 2016-11-30 | 浙江大学 | Optical levitation rotor micro gyro measures the device of angular velocity |
| CN107024604A (en) * | 2017-02-18 | 2017-08-08 | 浙江大学 | A kind of totally enclosed type ligh trap sensing control unit and preparation method thereof |
| CN107607047A (en) * | 2017-09-14 | 2018-01-19 | 中国人民解放军国防科技大学 | Method for correcting misalignment of axis of image sensor in double-beam optical trap |
| CN112863728A (en) * | 2021-04-26 | 2021-05-28 | 之江实验室 | Electric field amount calibration-based multi-dimensional optical tweezers calibration device and method |
| CN113257451A (en) * | 2021-05-11 | 2021-08-13 | 中国人民解放军国防科技大学 | Method for stabilizing position of captured microsphere in double-beam optical trap |
| CN114720722A (en) * | 2022-04-06 | 2022-07-08 | 中国人民解放军国防科技大学 | Method and device for stabilizing scale factor of optical suspension acceleration sensor |
| CN114755457A (en) * | 2022-04-06 | 2022-07-15 | 中国人民解放军国防科技大学 | Method for measuring scale factor of optical levitation acceleration sensor on line |
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| CN101320049A (en) * | 2008-07-11 | 2008-12-10 | 浙江大学 | Apparatus for measuring acceleration by double optical beams, optical fibers and light traps |
| CN101598741A (en) * | 2009-07-27 | 2009-12-09 | 浙江大学 | Utilize the four-beam fiber-optic trap device for measuring acceleration |
| CN101893736A (en) * | 2010-06-11 | 2010-11-24 | 哈尔滨工程大学 | Array core fiber-based axial array optical tweezer and photodynamic control method |
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| CN101893736A (en) * | 2010-06-11 | 2010-11-24 | 哈尔滨工程大学 | Array core fiber-based axial array optical tweezer and photodynamic control method |
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| 龚錾等: "四种光阱刚度测量法的实验研究与比较", 《中国科学技术大学学报》, vol. 35, no. 5, 31 October 2005 (2005-10-31), pages 601 - 606 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034322B (en) * | 2014-06-19 | 2016-11-30 | 浙江大学 | Optical levitation rotor micro gyro measures the device of angular velocity |
| CN105759073A (en) * | 2016-03-07 | 2016-07-13 | 浙江大学 | Full-closed type light trap sensing control unit and manufacturing method therefor |
| CN105759073B (en) * | 2016-03-07 | 2019-02-22 | 浙江大学 | Total closed type chip ligh trap sensing control unit and preparation method thereof |
| CN107024604A (en) * | 2017-02-18 | 2017-08-08 | 浙江大学 | A kind of totally enclosed type ligh trap sensing control unit and preparation method thereof |
| CN107024604B (en) * | 2017-02-18 | 2019-04-16 | 浙江大学 | A kind of totally enclosed type ligh trap sensing control unit and preparation method thereof |
| CN107607047A (en) * | 2017-09-14 | 2018-01-19 | 中国人民解放军国防科技大学 | Method for correcting misalignment of axis of image sensor in double-beam optical trap |
| CN112863728A (en) * | 2021-04-26 | 2021-05-28 | 之江实验室 | Electric field amount calibration-based multi-dimensional optical tweezers calibration device and method |
| CN112863728B (en) * | 2021-04-26 | 2021-07-02 | 之江实验室 | Electric field amount calibration-based multi-dimensional optical tweezers calibration device and method |
| CN113257451A (en) * | 2021-05-11 | 2021-08-13 | 中国人民解放军国防科技大学 | Method for stabilizing position of captured microsphere in double-beam optical trap |
| CN113257451B (en) * | 2021-05-11 | 2024-04-12 | 中国人民解放军国防科技大学 | Method for stabilizing captured microsphere position in double-beam optical trap |
| CN114720722A (en) * | 2022-04-06 | 2022-07-08 | 中国人民解放军国防科技大学 | Method and device for stabilizing scale factor of optical suspension acceleration sensor |
| CN114755457A (en) * | 2022-04-06 | 2022-07-15 | 中国人民解放军国防科技大学 | Method for measuring scale factor of optical levitation acceleration sensor on line |
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