CN207703722U - A kind of LIBS spectrum investigating systems based on streak tube - Google Patents
A kind of LIBS spectrum investigating systems based on streak tube Download PDFInfo
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- CN207703722U CN207703722U CN201820026252.5U CN201820026252U CN207703722U CN 207703722 U CN207703722 U CN 207703722U CN 201820026252 U CN201820026252 U CN 201820026252U CN 207703722 U CN207703722 U CN 207703722U
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Abstract
The laser pulse of the utility model proposes a kind of LIBS spectrum investigating systems based on streak tube, including laser, laser output is divided into two beams through beam splitting chip, a branch of to focus on measured target after deielectric-coating speculum is reflected into autocollimator system；Echo-signal transmits after being collected by autocollimator system through deielectric-coating speculum, optical fiber is converged to by condenser lens, the light of fiber exit is incident on beam splitting system so that by different wave length optical signal spatially relative separation, above-mentioned spectral signal is focused to streak tube by cylindrical lens；Another light beam after beam splitting chip is converted into electric signal by light trigger and triggers streak tube, and the time shaft of input light is converted into spatial axes and is imaged on to be formed on its fluorescent screen have time-resolved spectral signal by streak tube；Above-mentioned spectral signal is subjected to low-light amplification using ICCD, ICCD is connected with computer.The advantages that above system, which can be realized, quickly measures measured target time resolution laser induced breakdown spectroscopy, having time high resolution, high sensitivity.
Description
Technical field
The utility model is related to spectrographic detection field more particularly to a kind of LIBS spectrum investigating systems based on streak tube.
Background technology
Laser induced breakdown spectroscopy (Laser Induced Breakdown Spectroscopy, LIBS) is a kind of sharp
Light ablation spectral analysis technique, wavelength of the technology based on atom spectrum and ion spectra are corresponded with specific element, and
And spectral signal intensity and the content of corresponding element have a certain amount relationship.When the energy density of laser pulse is more than breakdown
When threshold value, you can generate plasma, utilize the emission spectrum of atom and ion in collection optical system plasma, analytical spectra
The corresponding feature peak intensity of element can be used for the qualitative and quantitative analysis of sample in figure, have quickly, in real time, be not necessarily to
Preparation of samples, loss it is small, can multielement simultaneously on-line checking the features such as, it is of increased attention in recent years.With it
He compares the method for common element analysis, can be carried out at the same time the quickly detection simultaneously of various metals and nonmetalloid.Based on LIBS
These advantages, it is all developed in multiple fields, for example, material composition analysis, environmental pollution, marine exploration, archaeology,
Medicine food, industry on-line monitoring etc..
LIBS uses photomultiplier or ICCD to obtain spectrum substantially at present, and the time that shutter can be gated by control obtains
Time resolved spectroscopy, but such mode has the shortcomings that temporal resolution is low, time of measuring is long.
Utility model content
In order to solve the problems in the existing technology, the utility model proposes a kind of LIBS spectrum based on streak tube
Detection system quickly measures measured target time resolution laser induced breakdown spectroscopy to realize, high with temporal resolution,
The advantages that measuring speed is fast, high sensitivity.
To achieve the goals above, the utility model proposes a kind of LIBS spectrum investigating systems based on streak tube, packet
Laser is included, the laser pulse of the laser output is divided into two beams through beam splitting chip, wherein a branch of reflect through deielectric-coating speculum
Measured target is focused on after to autocollimator system；Echo-signal passes through described after being collected by the autocollimator system
Deielectric-coating speculum transmits, then is coupled to optical fiber by condenser lens convergence, and the light of the fiber exit is incident on beam splitting system
Entrance slit is focused spectral signal by cylindrical lens by beam splitting system by different wave length optical signal spatially relative separation
To single slit of streak tube；The laser pulse of the laser output is formed by another light beams after beam splitting chip and passes through light
Trigger is converted into electric signal to trigger the streak tube, and the time shaft of input light is converted into space imaging shaft by the streak tube
On striped tube fluorescent screen, being formed has time-resolved spectral signal；The spectrum on striped tube fluorescent screen is believed using ICCD
Number low-light amplification is carried out, the ICCD is connected with computer, passes through the computer record storage spectroscopic data.
Preferably, the laser uses impulse high energy laser.
Preferably, the focus adjustable of the autocollimator system.
Preferably, the beam splitting system uses prism or grating splitting system.
Preferably, the light trigger delay is adjustable.
The advantageous effect of the program of the utility model is that the above-mentioned LIBS spectrum investigating systems based on streak tube use
Streak tube detector adds ICCD imaging modes, specifically superlaser breakdown measured target to generate plasma spectrum, streak tube time
Pole receives plasma light spectrum signal, and the photoelectron that deflection system is entered by different moments is made by different deflection voltages
With by photoelectron edge, perpendicular to the direction of slit, time resolution is realized in expansion, and is shown on a frame picture, realizes steady-state light
Spectrum and transient time compose while measuring, and once obtain the Three-Dimensional Fluorescence Spectra containing continuous time information.Drawing three-dimensional fluorescence Spectra etc.
High line chart, that is, spectral fingerprint, realization is detected measured target and type differentiates.Only single laser pulse emission can be obtained
Whole target wavelength and time resolved spectroscopy information, to quickly identify measured target type and its content.The utility model institute
The LIBS spectrum investigating systems based on streak tube being related to can realize that quickly measuring measured target time resolution induced with laser hits
Spectrum is worn, has many advantages, such as that temporal resolution is high, measuring speed is fast, high sensitivity.
Description of the drawings
Fig. 1 shows the functional block diagram of the LIBS spectrum investigating systems based on streak tube involved by the utility model.
Fig. 2 shows the principle schematics of the streak tube involved by the utility model.
Reference numeral：1- lasers, 2- beam splitting chips, 3- deielectric-coating speculums, 4- autocollimator systems, 5- focus saturating
Mirror, 6- optical fiber, 8- beam splitting systems, 9- cylindrical lenses, 10- streak tubes, 11- light triggers, 12-ICCD, 13- computers, A- quilts
Survey target.
Specific implementation mode
Specific embodiment of the present utility model is further described below in conjunction with the accompanying drawings.
As shown in Figure 1, the LIBS spectrum investigating systems based on streak tube involved by the utility model include laser 1,
In the present embodiment, impulse high energy laser can be used in the laser 1；The laser pulse that the laser 1 exports is through dividing
Beam piece 2 is divided into two beams, wherein a branch of is main beam, after deielectric-coating speculum 3 is reflected into autocollimator system 4, focuses
To measured target A, in the present embodiment, the focus adjustable of the autocollimator system 4, to realize the quilt of different distance
Survey the detection of target A；Echo-signal transmits after being collected by the autocollimator system 4 through the deielectric-coating speculum 3, then
Optical fiber 6 is coupled to by the convergence of condenser lens 5, the light that the optical fiber 6 is emitted is incident on prism or the incidence of grating splitting system 8 is narrow
Then seam is focused spectral signal by cylindrical lens 9 by beam splitting system 8 by different wave length optical signal spatially relative separation
To single slit of streak tube 10；It is logical that the laser pulse that the laser 1 exports is formed by another light beams after beam splitting chip 2
It crosses light trigger 11 and is converted into electric signal to trigger the streak tube 10, in the present embodiment, the delay of the light trigger 11 can
It adjusts；The time shaft of input light is converted into spatial axes and is imaged on striped tube fluorescent screen by the streak tube 10, and being formed has the time
The spectral signal of resolution；The spectral signal on striped tube fluorescent screen is subjected to low-light amplification, wherein ICCD12 water using ICCD12
Flat pixel corresponds to different spectral wavelengths, and the longitudinal directions ICCD12 pixel respective light intensities change with time numerical value, in this way per frame ICCD
Image produces the spectrum " fingerprint image " for including wavelength information and temporal information, we can be characterized as with its dactylogram
Foundation completes qualitatively and quantitatively analysis task more complicated in measured target A.The ICCD12 is connected with computer 13,
By 13 record storage spectroscopic data of the computer, the type and relevant information of measured target A are calculated.
The operation principle of the specific streak tube 10 is as follows, by the optical signal of 10 slit of the streak tube through photoelectricity the moon
Pole is converted into electric signal, and electronics realizes the deflection in space under the deflection voltage effect changed over time, by what is changed over time
Optical signal is converted into the time resolved spectroscopy figure of space change in location on striped tube fluorescent screen, as shown in Figure 2.
The LIBS spectrum investigating systems based on streak tube involved by the utility model add ICCD using streak tube detector
Imaging mode, specifically superlaser puncture measured target and generate plasma spectrum, and streak tube photocathode receives plasma spectrometry
Signal, the photoelectron that deflection system is entered by different moments are acted on by different deflection voltages, by photoelectron along perpendicular to
Time resolution is realized in the direction expansion of slit, and is shown on a frame picture, realizes stable state spectrum and transient time spectrum simultaneously
It measures, once obtains the Three-Dimensional Fluorescence Spectra containing continuous time information.Drawing three-dimensional fluorescence Spectra contour map, that is, spectral fingerprint, it is real
Now measured target is detected and type differentiates.Only single laser pulse emission can be obtained complete target wavelength and time point
Spectral information is distinguished, to quickly identify measured target type and its content.
The LIBS spectrum investigating systems based on streak tube involved by the utility model, which can be realized quickly to measure, is tested mesh
Time resolution laser induced breakdown spectroscopy is marked, has many advantages, such as that temporal resolution is high, measuring speed is fast, high sensitivity.
Claims (5)
1. a kind of LIBS spectrum investigating systems based on streak tube, it is characterised in that：Including laser, the laser output
Laser pulse is divided into two beams through beam splitting chip, wherein a branch of focus on after deielectric-coating speculum is reflected into autocollimator system
Measured target；Echo-signal transmits after being collected by the autocollimator system through the deielectric-coating speculum, then by focusing
Lens convergence is coupled to optical fiber, and the light of the fiber exit is incident on the entrance slit of beam splitting system, will be different by beam splitting system
Wavelength channels spatially relative separation, is focused to spectral signal on single slit of streak tube by cylindrical lens；It is described to swash
The laser pulse of light device output is formed by another light beams after beam splitting chip and is converted into electric signal by light trigger to trigger
The time shaft of input light is converted into spatial axes and is imaged on striped tube fluorescent screen by the streak tube, the streak tube, forms tool
The spectral signal that having time is differentiated；The spectral signal on striped tube fluorescent screen is subjected to low-light amplification, the ICCD using ICCD
It is connected with computer, passes through the computer record storage spectroscopic data.
2. the LIBS spectrum investigating systems according to claim 1 based on streak tube, it is characterised in that：The laser is adopted
With impulse high energy laser.
3. the LIBS spectrum investigating systems according to claim 1 based on streak tube, it is characterised in that：The reflective prestige
The focus adjustable of remote mirror system.
4. the LIBS spectrum investigating systems according to claim 1 based on streak tube, it is characterised in that：The beam splitting system
Using prism or grating splitting system.
5. the LIBS spectrum investigating systems according to claim 1 based on streak tube, it is characterised in that：The light trigger
It is delayed adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820026252.5U CN207703722U (en) | 2018-01-08 | 2018-01-08 | A kind of LIBS spectrum investigating systems based on streak tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820026252.5U CN207703722U (en) | 2018-01-08 | 2018-01-08 | A kind of LIBS spectrum investigating systems based on streak tube |
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| Publication Number | Publication Date |
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| CN207703722U true CN207703722U (en) | 2018-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820026252.5U Active CN207703722U (en) | 2018-01-08 | 2018-01-08 | A kind of LIBS spectrum investigating systems based on streak tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111077134A (en) * | 2020-02-11 | 2020-04-28 | 杭州谱育科技发展有限公司 | Portable LIBS system with carbon measurement function and carbon element detection method |
-
2018
- 2018-01-08 CN CN201820026252.5U patent/CN207703722U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111077134A (en) * | 2020-02-11 | 2020-04-28 | 杭州谱育科技发展有限公司 | Portable LIBS system with carbon measurement function and carbon element detection method |
| CN111077134B (en) * | 2020-02-11 | 2022-09-06 | 杭州谱育科技发展有限公司 | Portable LIBS system with carbon measurement function and carbon element detection method |
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