CN102841219B - 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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- CN102841219B CN102841219B CN201210322842.XA CN201210322842A CN102841219B CN 102841219 B CN102841219 B CN 102841219B CN 201210322842 A CN201210322842 A CN 201210322842A CN 102841219 B CN102841219 B CN 102841219B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 34
- 239000013307 optical fiber Substances 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 230000005484 gravity Effects 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000011859 microparticle Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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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 inertial navigation system field, be specifically related to a kind of multiple beam Optical Trap Stiffness caliberating device and method thereof.
Background technology
The rigidity of accelerometer is an important indicator that characterizes acceleration performance.Multiple beam ligh trap has very low rigidity, generally adopts towing method or utilizes Brownian movement to demarcate the rigidity of ligh trap.Brownian movement method is subject to the impact of external disturbance; Towing method needs position sensor to have very high temporal resolution and spatial resolution; Adopt remaining gravitational method to demarcate Optical Trap Stiffness and be neither subject to external interference, and use common CCD can realize the demarcation of Optical Trap Stiffness.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of multiple beam Optical Trap Stiffness caliberating device and method thereof are provided.
Multiple beam Optical Trap Stiffness 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 needs captive particulate, and the laser that two-laser sends is connected by optical fiber and the fixing relative optical fiber of the substrate by fiber-optic trap system through isolator; Finally be irradiated to and treat on captive particulate, produce ligh trap.
The substrate of described fiber-optic trap system, isolator, laser instrument connect to form 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 of two groups of mutually vertically opposite optical fiber formation fiber-optic trap systems.
Multiple beam Optical Trap Stiffness scaling method is: will treat that captive particulate is placed in liquid, the density of liquid is less than the density of particulate, by ligh trap by captive particle capture a stable position, when the substrate of fiber-optic trap system has the variation at an inclination angle, captive particulate is subject to the impact of remaining gravity and is subjected to displacement in the direction at inclination angle, again during balance, ligh trap power and remaining gravitational equilibrium; Because ligh trap power is linear at one among a small circle, by measuring the displacement of particulate under different angle, calibrate the rigidity of ligh trap;
The concrete steps of the demarcation of multiple beam Optical Trap Stiffness are as follows:
Step 1, assemble fiber-optic trap system, the substrate of fiber-optic trap system is fixed on circular dividing table 1, in " ten " font groove, splash into liquid, be placed in micro-Microscopic observation, make to see clearly " ten " font groove center;
Step 2, by waiting that being obtained particulate splashes in " ten " word groove of fiber-optic trap system substrate, open laser, confirm that particulate to be hunted down is by beam-capturing;
Step 3, open microscopical video recording, record the video of 5 minutes; By circular dividing table rotational angle
, then record the video of 5 minutes;
The method of step 4, employing Video processing, the video that treatment step three obtains, show that circular dividing table rotates the displacement of front and back particulate with respect to fiber end face.
Described fiber-optic trap system adopts twin-beam ligh trap or four light beam ligh traps.The described 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 multiple beam ligh trap provides small external force, by measuring the displacement of equilibrium position and the size of remaining gravity, the rigidity of demarcating ligh trap.Multiple beam ligh trap has highly sensitive, the feature that rigidity is little, and its rigidity can reach
, the method for traditional measurement rigidity is no longer applicable to the demarcation of this accelerometer rigidity.The method is applicable to demarcate the rigidity of the ligh trap being produced by scattering force and the gradient force of laser.
Accompanying drawing explanation
Fig. 1 is multiple beam Optical Trap Stiffness caliberating device structural representation;
Fig. 2 is the substrate structure schematic diagram of fiber-optic trap system of the present invention;
Fig. 3 is multiple beam Optical Trap Stiffness calibration principle figure.
Embodiment
As shown in Figure 1, 2, multiple beam Optical Trap Stiffness 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 needed captive particulate 3, and the laser that two-laser 5 sends is connected by optical fiber and the fixing relative optical fiber of the substrate by fiber-optic trap system 2 through isolator 4; Finally be irradiated to and treat on captive particulate 3, produce ligh trap.
The substrate 2 of described fiber-optic trap system, isolator 4, laser instrument 5 connect to form fiber-optic trap system by optical fiber; The substrate 2 Shang centers of described fiber-optic trap system are provided with " ten " font groove, and are fixed with the substrate of two groups of mutually vertically opposite optical fiber formation fiber-optic trap systems.
Multiple beam Optical Trap Stiffness scaling method is: will treat that captive particulate 3 is placed in liquid, the density of liquid is less than the density of particulate, by ligh trap, captive particulate 3 is captured in to a stable position, when the substrate 2 of fiber-optic trap system has the variation at an inclination angle, captive particulate 3 is subject to the impact of remaining gravity and is subjected to displacement in the direction at inclination angle, again during balance, ligh trap power and remaining gravitational equilibrium; Because ligh trap power is linear at one among a small circle, by measuring the displacement of particulate under different angle, calibrate the rigidity of ligh trap;
The concrete steps of the demarcation of multiple beam Optical Trap Stiffness are as follows:
Step 1, assemble fiber-optic trap system, the substrate of fiber-optic trap system 2 is fixed on circular dividing table 1, in " ten " font groove, splash into liquid, be placed in micro-Microscopic observation, make to see clearly " ten " font groove center;
Step 2, by waiting that being obtained particulate 3 splashes in " ten " word groove of fiber-optic trap system substrate, open laser 5, confirm that particulate 3 to be hunted down is by beam-capturing;
Step 3, open microscopical video recording, record the video of 5 minutes; By circular dividing table 1 rotational angle
, then record the video of 5 minutes;
The method of step 4, employing Video processing, the video that treatment step three obtains, show that circular dividing table 1 rotates the displacement of front and back particulate with respect to fiber end face.
Described fiber-optic trap system adopts twin-beam ligh trap or four light beam ligh traps.The described particulate 3 that is hunted down is for ps particle, silit or silicon dioxide microparticle.Described solution is deionized water, KOH solution or NaCl solution.
Utilize the present invention to demarcate the principle of multiple beam Optical Trap Stiffness as follows:
As shown in Figure 3, initial substrate is vertical with vertical direction; Particle, due in being immersed in liquid, only remains 0.05 remaining gravity.When turning over angle
, remaining gravity at axial component is
, when particle-stabilised, axially meeting:
Wherein
for the power of catching,
for the quality of particle.
If be s by particulate before and after the inclination of video extraction with respect to the displacement of fiber end face, the computing formula that can obtain Optical Trap Stiffness is:
Claims (4)
1. a multiple beam Optical Trap Stiffness scaling method, it is characterized in that: adopt multiple beam Optical Trap Stiffness caliberating device, to treat that captive particulate (3) is placed in liquid, the density of liquid is less than the density of particulate, by ligh trap, will treat that captive particulate (3) is captured in a stable position, when the substrate (2) of fiber-optic trap system has the variation at an inclination angle, treat that captive particulate (3) is subject to the impact of remaining gravity and is subjected to displacement in the direction at inclination angle, again during balance, ligh trap power and remaining gravitational equilibrium; Because ligh trap power is linear at one among a small circle, by measuring the displacement of particulate under different angle, calibrate the rigidity of ligh trap;
The concrete steps of the demarcation of multiple beam Optical Trap Stiffness are as follows:
Step 1, assemble fiber-optic trap system, the substrate of fiber-optic trap system (2) is fixed on to circular dividing table (1) upper, in " ten " font groove, splash into liquid, be placed in micro-Microscopic observation, make to see clearly " ten " font groove center;
Step 2, will treat that captive particulate (3) splashes in " ten " word groove of fiber-optic trap system substrate, open laser instrument (5), and confirm to treat that captive particulate (3) is by beam-capturing;
Step 3, open microscopical video recording, record the video of 5 minutes; By circular dividing table (1) rotational angle, then record the video of 5 minutes;
The method of step 4, employing Video processing, the video that treatment step three obtains, show that circular dividing table (1) rotates the displacement of front and back particulate with respect to fiber end face;
Described multiple beam Optical Trap Stiffness caliberating device comprise circular dividing table (1), fiber-optic trap system substrate (2), treat 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 (2) of fiber-optic trap system is uploaded and is needed captive particulate (3), and the laser that two-laser (5) sends is connected by optical fiber and the fixing relative optical fiber of the substrate (2) by fiber-optic trap system through isolator (4); Finally be irradiated to and treat that captive particulate (3) is upper, produce ligh trap;
The substrate (2) of described fiber-optic trap system, isolator (4), laser instrument (5) connect to form fiber-optic trap system by optical fiber; Substrate (2) the Shang center of described fiber-optic trap system is provided with " ten " font groove, and is fixed with the substrate of two groups of mutually vertically opposite optical fiber formation fiber-optic trap systems.
2. a kind of multiple beam Optical Trap Stiffness scaling method as claimed in claim 1, is characterized in that: described fiber-optic trap system adopts twin-beam ligh trap or four light beam ligh traps.
3. a kind of multiple beam Optical Trap Stiffness scaling method as claimed in claim 1, is characterized in that: described in treat that captive particulate (3) is ps particle, silit or silicon dioxide microparticle.
4. a kind of multiple beam Optical Trap Stiffness scaling method as claimed in claim 1, is characterized in that: described liquid 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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| 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 |
| 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 |
| CN107607047B (en) * | 2017-09-14 | 2019-08-06 | 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 |
| 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 |
| 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 |
| 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 |
| 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 |
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| CN100580456C (en) * | 2008-07-11 | 2010-01-13 | 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 |
| CN101893736B (en) * | 2010-06-11 | 2012-06-06 | 哈尔滨工程大学 | Array core fiber-based axial array optical tweezer and photodynamic control method |
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