CN204214767U - A kind of sample stage detected for Laser-induced Breakdown Spectroscopy - Google Patents
A kind of sample stage detected for Laser-induced Breakdown Spectroscopy Download PDFInfo
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- CN204214767U CN204214767U CN201420688481.5U CN201420688481U CN204214767U CN 204214767 U CN204214767 U CN 204214767U CN 201420688481 U CN201420688481 U CN 201420688481U CN 204214767 U CN204214767 U CN 204214767U
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- induced breakdown
- breakdown spectroscopy
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- 238000002536 laser-induced breakdown spectroscopy Methods 0.000 title claims abstract description 37
- 230000000452 restraining effect Effects 0.000 claims abstract description 25
- 238000006073 displacement reaction Methods 0.000 claims abstract description 16
- 230000005284 excitation Effects 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 17
- 230000003028 elevating effect Effects 0.000 claims description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- 239000004606 Fillers/Extenders Substances 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 description 19
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000011109 contamination Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The utility model discloses a kind of sample stage detected for Laser-induced Breakdown Spectroscopy, comprise the electric displacement platform at least with one dimension degree of freedom, described electric displacement platform is provided with movable lifter plate, with the objective table be sliding combined with for placing sample, described lifter plate is provided with transparent constraint window, impacts sample after laser light constraint window; The below of described lifter plate is provided with restraining plate, and this restraining plate is placed in directly over sample, and restraining plate is distributed with constraint chamber, this constraint chamber is for retraining the plasma of sample excitation.The utility model laterally and is longitudinally retrained by plasma, and regulates constraint space size adjustment line strength according to different sample requirement, and it is 2-10 times that line strength strengthens scope.
Description
Technical field
The utility model relates to Laser-induced Breakdown Spectroscopy detection technique, particularly a kind of sample stage detected for Laser-induced Breakdown Spectroscopy.
Background technology
Laser induced breakdown spectrograph (Laser-Induced Breakdown Spectroscopy, LIBS) plasma ablation utilizing pulse laser to produce material in excited sample (being generally solid), and obtain by spectrometer the spectrum that Plasma-Atomic launches that is excited, identify the element constituent in sample with this, and then the identification of material, classification, qualitative and quantitative test can be carried out.This technology, without the need to carrying out pre-service to sample, can realize long-range, micro-damage fast and detect sample element (especially metallic element), can be used for the detection of solid, gas, fluid sample.The application of Laser-induced Breakdown Spectroscopy is also very extensive, as heavy metal analysis and explosive detection etc. in biomedicine, archaeology, environmental monitoring, water.
But LIBS analysis and detection technology also has corresponding limitation: 1. detection limit is higher.The detection limit of usual LIBS is greater than μ g/g.2. repeatability is poor.Easily be subject to the impacts such as energy, object lens distance, sample matrices because LIBS detects to analyze, therefore the relative standard deviation of testing result is generally about 10%.Therefore, raising LIBS technology for detection ability and repeatability are the important contents of current LIBS technical development.
Space constraint is a kind of a kind of effective ways improving Laser-induced Breakdown Spectroscopy signal intensity, reduce detection limit.As patented claim CN 103543131A proposes a kind of method improving elements are contained precision based on dipulse and space constraint effect, first the method makes hole, hole or cavity in testing sample surface, then utilizes double-pulse laser to impact sample.First pulse produces environment under low pressure in hole, hole or inside cavity, and second pulse then produces plasma for excited sample.Plasma is subject to space constraint effect in the process of expansion, plasma temperature and electron density are significantly improved, and plasma is more even, is conducive to the stability increasing measuring-signal, improve signal to noise ratio (S/N ratio), reduce the detection limit of sample medium trace element.This patent points out that space constraint can improve the strength and stability of LIBS measuring-signal, is conducive to the raising of elements are contained precision.
Utility model content
The utility model provides a kind of sample stage detected for Laser-induced Breakdown Spectroscopy, adopt space horizontal and vertical method for limiting enhanced line intensity, plasma restraining plate adopts chromium plating aluminium sheet, and constraint chamber adopts conical structure, and sample adopts V-type sliding block guide track structure to move.
Concrete technical scheme of the present utility model is as follows:
For the sample stage that Laser-induced Breakdown Spectroscopy detects, comprise the electric displacement platform at least with one dimension degree of freedom, described electric displacement platform be provided with movable lifter plate, and be sliding combined with the objective table for placing sample,
Described lifter plate is provided with transparent constraint window, impacts sample after laser light constraint window;
The below of described lifter plate is provided with restraining plate, and this restraining plate is placed in directly over sample, and restraining plate is distributed with constraint chamber, this constraint chamber is for retraining the plasma of sample excitation.
Provided by the utility model is a kind of sample stage based on space constraint enhanced line intensity, can laterally and longitudinally retrain by plasma, and regulating constraint space size adjustment line strength according to different sample requirement, it is 2-10 times that line strength strengthens scope.Constraint window is mainly used in plasma and longitudinally retrains, and has good transmissivity to the characteristic spectral line of incident laser and plasma generation.The transverse direction that constraint chamber on restraining plate is mainly used in plasma retrains, and makes characteristic spectral line carry out constraint propagation, improves spectral line collection efficiency and line strength, and it is 2-10 times that line strength strengthens scope.
Described electric displacement platform is provided with the elevating mechanism driving lifter plate, and comprise with the elevating lever of tooth bar and the slide block along elevating lever slip, described slide block is provided with and tooth bar meshed gears, and described lifter plate is fixed on slide block.Utilize the engagement of rack and pinion, drive slide block lifting, structure is simple, convenient operation.
Described lifter plate is the right angle card extender of L shape.Described lifter plate is provided with printing opacity mouth, and this printing opacity mouth place is coated with light-passing board, the constraint window described in described printing opacity mouth and light-passing board form.Described printing opacity mouth inward flange is provided with support level, and light-passing board is directly placed in printing opacity mouth, relies on support level to fix.
In the utility model, described light-passing board is poly (methyl methacrylate) plate, and the selection of material is N-BK7, and thickness is 1 ~ 5mm, and transmitance is greater than 90%, and energy threshold is greater than 10J/cm
2.Line enhancement effect suffers restraints the impact of window from sample distance.Because properties of samples is different with the element spectral line intensity that will detect, constraint window of the present utility model can move in the vertical direction, regulates line strength as required.For ensureing that laser effectively excites the effective collection with characteristic spectral line, the transmitance of light-passing board to optical maser wavelength and characteristic spectral line should be greater than 90%.Meanwhile, for preventing laser from causing damage to poly (methyl methacrylate) plate, its energy threshold should be greater than 10J/cm
2.
As preferably, described restraining plate is the aluminium sheet of chromium plating, and thickness is 1 ~ 3mm.In the constraint chamber of aluminium sheet, carry out chromium plating, make inner chamber have higher reflectivity, make characteristic spectral line constraint propagation, improve spectral line collection efficiency.
Described constraint chamber is conical, and upper conical surface diameter is 2 ~ 8mm, lower conical surface diameter 1 ~ 3mm larger than upper conical surface diameter.Conical surface diameter adopts this size effectively to retrain the plasma of different sample.In addition, constraint chamber adopts conical structure, and due to the structure that it is up-small and down-big, the structure compared with column type better can obtain plasma and retrain.In addition, when plasma is from taper shape constraint chamber injection, because its space constraint strengthens, its electron density and movement velocity all can be enhanced, therefore advantageously in the enhancing of spectral line signal.
For ease of the placement of testing sample, described electric displacement platform offers slide-and-guide groove, described objective table has the orienting lug with slide-and-guide slot fit, adopt sliding block guide track structure, objective table can push flexibly or extract out immediately below constraint window, avoids raising troublesome operation such as constraint window and restraining plate etc.
Described electric displacement platform is provided with two guideposts, restraining plate is set on guidepost.Move up and down restraining plate along guidepost, regulate the height of restraining plate, restraining plate covers sample surfaces, is conducive to smooth sample surfaces and improves detection repeatability, avoid exciting other region to be measured of particle contamination simultaneously.When testing sample is the surface irregularity samples such as fresh blade, its region to be measured and lens distance there are differences, and then affect the laser parameter that laser arrives sample.The detection stability of Laser-induced Breakdown Spectroscopy and the laser parameter in region to be detected closely bound up, therefore smooth sample surfaces be conducive to fixed laser parameter improve detect repeatability.In addition, the up-small and down-big conical structure of restraining plate is conducive to farthest avoiding exciting particle contamination by a upper surveyed area, ensures that institute's detected object is the element in region to be detected.
The beneficial effect that the utility model has is:
1) effectively can strengthen LIBS spectral line signal, it is 2-10 times that line strength strengthens scope;
2) can avoid exciting particle again to cover sample surfaces, affect sample postorder and detect analysis;
3) the smooth sample surfaces of energy (special in out-of-flatness samples such as fresh blades), makes sample remain unchanged to the distance of condenser lens thus improve detection repeatability;
4) there is the features such as adjustment is simple, cost is low, convenient disassembly.
Accompanying drawing explanation
Fig. 1 is the sample stage structural drawing detected for Laser-induced Breakdown Spectroscopy;
Fig. 2 is the vertical view of sample stage in Fig. 1;
Fig. 3 is the right view of sample stage in Fig. 1;
Fig. 4 is the schematic diagram that on sample stage, sample is impacted;
Fig. 5 is unconfined plasma figure;
Fig. 6 is the constraints graph with constraint window and constraint chamber plasma.
Embodiment
As Figure 1-3, a kind of sample stage detected for Laser-induced Breakdown Spectroscopy, comprises gear rack elevating bar 1, gear slider 2, right angle card extender 3, plasma confinement window 4, cylindrical guide 5, plasma confinement plate 6, V-type slide block 7, combined electrical moving stage 9, pull bar 10.
Combined electrical moving stage 9 adopts four-degree-of-freedom (x, y, z, w) combined electrical moving stage, comprises three single-degree-of-freedoms (x, y and z) pulse electric displacement platform and rotary freedom (w) electric rotary table.
Gear rack elevating bar 1 is vertically arranged in combined electrical moving stage 9, and gear slider 2 engages with gear rack elevating bar 1, can be lower mobile in the vertical direction.Right angle card extender 3 is secured by bolts on gear slider 3, and plane is provided with the printing opacity mouth of rectangle, and printing opacity mouth edge is provided with support level, is provided with light-passing board in printing opacity mouth, forms plasma confinement window mouth 4.
Cylindrical guide 5 is fixed on combined electrical moving stage 9, and plasma confinement plate 6 can slide up and down along cylindrical guide 5.Cylindrical guide 5 and gear rack elevating bar 1 all by bolt-connection in combined electrical moving stage 9.Combined electrical moving stage 9 has V-type groove, and V-type slide block 7 can horizontally slip along V-type groove under pull bar 10 acts on, and pull bar 10 is by being screwed in V-type slide block 7.Sample 8 is placed on V-type slide block 7 (being equivalent to objective table), and laser impacts downwards from top, by plasma confinement window 4, and through plasma confinement plate 6, impact is to sample surfaces, and activated plasma, cooling sends characteristic spectral line and collected by optical fiber.
In the present embodiment, the material of plasma confinement window mouth 4 is N-BK7, and thickness is 1 ~ 3mm, and transmitance is greater than 90%, and energy threshold is greater than 10J/cm
2.Plasma confinement window mouth 4 is mainly used in plasma and longitudinally retrains, and has good transmissivity to the characteristic spectral line of incident laser and plasma generation.N-BK7 is a kind of common optical glass, can through the light of 350nm ~ 2000nm wave band, and the transmissivity of its laser is greater than 90%, and energy threshold is greater than 10J/cm
2.Therefore retraining window 4 the selection of material is N-BK7, and thickness is 1 ~ 3m.
Plasma confinement window mouth 4 vertically can move under gear slider 2 acts on.Line enhancement effect suffers restraints the impact of window from sample distance.Because properties of samples is different with the element spectral line intensity that will detect, plasma confinement window mouth 4 of the present utility model can move in the vertical direction, regulates line strength as required.
In the present embodiment, the material of plasma confinement plate 6 is the aluminium sheet of chromium plating, and thickness is 1mm, and be evenly distributed with conical constraint chamber 11 in the middle of it, upper conical surface diameter and lower conical surface diameter are 2mm and 3mm respectively.With combined electrical moving stage 9, the spacing in constraint chamber 11 should plan that displacement is consistent.The transverse direction that plasma restraining plate 6 is mainly used in plasma retrains, and makes characteristic spectral line carry out constraint propagation, improves spectral line collection efficiency and line strength, and it is 2 ~ 10 times that line strength strengthens scope.In the constraint chamber 11 of aluminium sheet, carry out chromium plating, make inner chamber have higher reflectivity, make characteristic spectral line constraint propagation, improve spectral line collection efficiency.Constraint chamber adopts conical structure, and due to the structure that it is up-small and down-big, the structure compared with column type better can obtain plasma and retrain.In addition, when plasma is from taper shape constraint chamber injection, because its space constraint strengthens, its electron density and movement velocity all can be enhanced, therefore advantageously in the enhancing of spectral line signal.With combined electrical moving stage 9, the spacing in the constraint chamber of plasma restraining plate 6 of the present utility model plans that displacement is consistent, can be applicable to the working method of Laser-induced Breakdown Spectroscopy Surface scan.The utility model adopts plasma restraining plate 6 to cover sample surfaces, is conducive to smooth sample surfaces and improves detection repeatability, avoid exciting other region to be measured of particle contamination simultaneously.When testing sample is the surface irregularity samples such as fresh blade, its region to be measured and lens distance there are differences, and then affect the laser parameter that laser arrives sample.The detection stability of Laser-induced Breakdown Spectroscopy and the laser parameter in region to be detected closely bound up, therefore smooth sample surfaces be conducive to fixed laser parameter improve detect repeatability.In addition, the up-small and down-big conical structure of plasma restraining plate 6 is conducive to farthest avoiding exciting particle contamination by a upper surveyed area, ensures that institute's detected object is the element in region to be detected.
V-type slide block 7 can move along V-type groove under pull bar 10 acts on, and adopts this V-type sliding block guide track structure, avoids raising the troublesome operation such as plasma confinement window mouth and plasma restraining plate.Connection between plasma confinement plate 6 and cylindrical guide 5 is stressed joint, and plasma confinement plate 6 can not freely glide under gravity.
During the utility model assembling, first gear elevating lever 1 and cylindrical guide 5 are fixed by bolt and combined electrical moving stage 9, again V-type slide block 7 and pull bar 10 are coordinated by internal and external threads fixing, the V-type slot fit of V-type slide block 7 with combined electrical moving stage 9 is made it to be free to slide along V-type groove.By plasma confinement plate 6 mating holes through 2 cylindrical guides 5, can not freely glide under Action of Gravity Field.Gear slider 2 is matched by rack-and-pinion with gear elevating lever 1, and right angle card extender 3 is by screw attachment on gear slider 2, and the plasma confinement window 4 on right angle card extender 3, can move in the vertical direction under rack-and-pinion effect.
As shown in Figure 4, the utility model is applicable to the several working ways of Laser-induced Breakdown Spectroscopy, both can realize conllinear formula and excite, also can realize rectilinear exciting; Both applicable for single-pulse laser induced breakdown spectroscopy, be also applicable to double-pulse laser induced breakdown spectrum.The utility model is specially adapted to, as biological specimens such as the fresh blades of plant, effectively to improve signal intensity.For the rectilinear Laser-induced Breakdown Spectroscopy system of dipulse, during utility model works, by pull bar 10, V-type slide block 7 is shifted out from working position, detected sample 8 is positioned on V-type slide block 7, then shift V-type slide block 7 onto working position.Mobile plasma confinement plate 6 makes it to be pressed onto on sample 8, then regulates plasma confinement window 4 upper-lower position, can limit the plasma inspired.It is corresponding with the position of top laser that control combination electric displacement platform 9 makes the pyramid type of plasma confinement plate 6 retrain chamber 11, and the work step-length arranging combined electrical moving stage 9 is conical constraint chamber neighbor distance or multiple.Beam of laser B is through light path system, and line focus lens are propagated downwards from top, through plasma confinement window 4, and through conical constraint chamber impact sample.Its laser transmittance of plasma confinement window 4 is greater than 90%, and energy threshold is greater than 10J/cm
2.Second bundle laser A vertically focuses on impact on the plasma inspired by condenser lens, enhanced line signal.Plasma cooling sends characteristic spectral line C and is collected by the optical fiber collection system of top.The number of times of required impact can be selected in each position according to actual requirement, moved carry out multiple positions spectra collection after completing a position by combined electrical moving stage 9.As shown in Figure 5 and Figure 6, when without plasma confinement window 4 and plasma confinement plate 6, the plasma D inspired is free excited state; After limiting the plasma D excited, the density of plasma D increases, and plasma temperature raises, and enhances line strength of excited atom.
Utility model works principle:
Space constraint is a kind of a kind of effective ways improving Laser-induced Breakdown Spectroscopy signal intensity, reduce detection limit.First, when the expansion of plasma is subject to space constraint, the temperature of plasma and electron density all can increase.Secondly, the secondary pressure ripple produced due to space constraint and reflected shock wave carry out post bake to primary plasma, so improve temperature and the electron density of plasma further.Therefore, when carrying out space constraint to activated plasma, plasma temperature and electron density increase greatly, are conducive to realizing thermal equilibrium condition, improve line strength, reduce detection limit.
Claims (10)
1. for the sample stage that Laser-induced Breakdown Spectroscopy detects, comprise the electric displacement platform at least with one dimension degree of freedom, it is characterized in that, described electric displacement platform is provided with movable lifter plate, and is sliding combined with the objective table for placing sample,
Described lifter plate is provided with transparent constraint window, impacts sample after laser light constraint window;
The below of described lifter plate is provided with restraining plate, and this restraining plate is placed in directly over sample, and restraining plate is distributed with constraint chamber, this constraint chamber is for retraining the plasma of sample excitation.
2. as claimed in claim 1 for the sample stage of Laser-induced Breakdown Spectroscopy detection, it is characterized in that, described electric displacement platform is provided with the elevating mechanism driving lifter plate, comprise with the elevating lever of tooth bar and the slide block along elevating lever slip, described slide block is provided with and tooth bar meshed gears, and described lifter plate is fixed on slide block.
3., as claimed in claim 2 for the sample stage that Laser-induced Breakdown Spectroscopy detects, it is characterized in that, described lifter plate is the right angle card extender of L shape.
4., as claimed in claim 1 for the sample stage that Laser-induced Breakdown Spectroscopy detects, it is characterized in that, described lifter plate is provided with printing opacity mouth, and this printing opacity mouth place is coated with light-passing board, the constraint window described in described printing opacity mouth and light-passing board form.
5., as claimed in claim 4 for the sample stage that Laser-induced Breakdown Spectroscopy detects, it is characterized in that, described printing opacity mouth inward flange is provided with support level, and described light-passing board is placed on support level.
6., as claimed in claim 5 for the sample stage that Laser-induced Breakdown Spectroscopy detects, it is characterized in that, described light-passing board is poly (methyl methacrylate) plate, and thickness is 1 ~ 5mm, and transmitance is greater than 90%, and energy threshold is greater than 10J/cm
2.
7., as claimed in claim 1 for the sample stage that Laser-induced Breakdown Spectroscopy detects, it is characterized in that, described restraining plate is the aluminium sheet of chromium plating, and thickness is 1 ~ 3mm.
8. as claimed in claim 1 for the sample stage that Laser-induced Breakdown Spectroscopy detects, it is characterized in that, described constraint chamber is conical, and upper conical surface diameter is 2 ~ 8mm, lower conical surface diameter 1 ~ 3mm larger than upper conical surface diameter.
9., as claimed in claim 1 for the sample stage that Laser-induced Breakdown Spectroscopy detects, it is characterized in that, described electric displacement platform offers slide-and-guide groove, described objective table has the orienting lug with slide-and-guide slot fit.
10., as claimed in claim 9 for the sample stage that Laser-induced Breakdown Spectroscopy detects, it is characterized in that, described electric displacement platform is provided with two guideposts, restraining plate is set on guidepost.
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| CN201420688481.5U CN204214767U (en) | 2014-11-17 | 2014-11-17 | A kind of sample stage detected for Laser-induced Breakdown Spectroscopy |
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| CN201420688481.5U CN204214767U (en) | 2014-11-17 | 2014-11-17 | A kind of sample stage detected for Laser-induced Breakdown Spectroscopy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374698A (en) * | 2014-11-17 | 2015-02-25 | 浙江大学 | Sample table for laser-induced breakdown spectroscopy detection |
| CN108344697A (en) * | 2018-05-14 | 2018-07-31 | 苏州大学 | A kind of special loading shelf combination of the external sample of optoacoustic tomoscan molecular imaging system |
-
2014
- 2014-11-17 CN CN201420688481.5U patent/CN204214767U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374698A (en) * | 2014-11-17 | 2015-02-25 | 浙江大学 | Sample table for laser-induced breakdown spectroscopy detection |
| CN104374698B (en) * | 2014-11-17 | 2017-04-12 | 浙江大学 | Sample table for laser-induced breakdown spectroscopy detection |
| CN108344697A (en) * | 2018-05-14 | 2018-07-31 | 苏州大学 | A kind of special loading shelf combination of the external sample of optoacoustic tomoscan molecular imaging system |
| CN108344697B (en) * | 2018-05-14 | 2024-02-09 | 苏州大学 | Special sample loading frame combination for in-vitro samples of photoacoustic tomography molecular imaging system |
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Granted publication date: 20150318 Termination date: 20201117 |
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