CN109374592A - A kind of miniature laser spectrometer - Google Patents
A kind of miniature laser spectrometer Download PDFInfo
- Publication number
- CN109374592A CN109374592A CN201811090657.6A CN201811090657A CN109374592A CN 109374592 A CN109374592 A CN 109374592A CN 201811090657 A CN201811090657 A CN 201811090657A CN 109374592 A CN109374592 A CN 109374592A
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- China
- Prior art keywords
- light
- spectrometer
- laser
- raman
- collecting lens
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
Abstract
The present invention relates to a kind of miniature laser spectrometers, belong to field of analytic instrument.The linear purification optical filter of the laser that laser of the invention issues reaches on beam splitting filter, and beam splitting filter reflects light, and the light after reflection focuses on article surface to be measured by the first light collecting lens；Rayleigh scattering and Raman scattering occur for laser excitation article to be measured, scattering light passes through the first light collecting lens and beam splitting filter, beam splitting filter reflects Rayleigh scattering light, Raman scattering light transmission, Raman diffused light successively passes through Raman notch filtering light piece and the second light collecting lens, enter the slit of fiber spectrometer after being focused by the second light collecting lens, the silicon detector built in fiber spectrometer will test passed through Raman diffused light, form optical signal.Spectrometer of the invention has (170mm × 80mm × 25mm) small in size, light weight (350g), the wide (200~3200cm of detectable light spectral limit‑1), high resolution (7~12cm‑1), the features such as storage temperature section is wide (- 40~+70 DEG C), detection accuracy high (being greater than 97%).
Description
Technical field
The present invention relates to a kind of miniature laser spectrometers, belong to field of analytic instrument.
Background technique
The attack of terrorism of explosion has become the serious problem that current international community faces, and seriously threatens the peace of the country and people
Entirely.Current the wide in variety of blasting material, source are wide, it has also become the great difficult problem of China's anti-terrorism work.
Laser Raman spectrometer technology is high with detection sensitivity, time of measuring is short, spectral information is abundant, is not necessarily to sample system
The features such as standby, nonstaining property, it is widely used in medicine, chemistry, food safety, environment measuring, Gemstone Identification, geological exploration and public affairs
The multiple fields such as safety monitor altogether.In public safety supervision field, Raman spectrum nondestructive analysis technology is in criminal investigation and explosion quality testing
The directions such as surveying has huge application prospect, can fast and effeciently detect harmful chemicals and dangerous explosive, with ensure military task,
The personal safety of Security Personnel and the people.
And traditional Raman spectrometer is bulky, mounting condition require it is harsh, need Alternating Current Power Supply, operating process it is cumbersome,
The reasons such as inconvenient to carry are greatly limited, the scene of can not carrying out, in-situ study in the application in safety check place, it is difficult to
Realize efficient and convenient feature.Domestic each safety check place is narrow using rays safety detection apparatus detection range, and sensitivity is low, expensive；Beauty
The portable spectrometer weight of B&WTek company of state production is 1.1kg；The Raman spectrometer of Nicolet company of U.S. production
FirstDefender RMX weight is 0.8kg, and weight is larger, and price is up to 210,000 RMB, is unfavorable for pushing away on a large scale
Wide and use.
Summary of the invention
The purpose of the invention is to overcome, existing Raman spectrometer is bulky, mounting condition requirement is harsh, needs to hand over
Cumbersome, expensive, the inconvenient to carry problem of stream power supply, operating process, provides a kind of miniature laser spectrometer.
A kind of miniature laser spectrometer, comprising: interior arrangement and main casing；Interior arrangement is placed in main casing；
Interior arrangement includes: laser, linearly purifies optical filter, beam splitting filter, the first light collecting lens, the filter of Raman trap
Mating plate, the second light collecting lens and fiber spectrometer；
The linear purification optical filter of the laser that laser issues reaches on beam splitting filter, and beam splitting filter is anti-by light
It penetrates, the light after reflection focuses on article surface to be measured by the first light collecting lens；Laser excitation article to be measured occurs Rayleigh and dissipates
It penetrates and Raman scattering, scattering light passes through the first light collecting lens and beam splitting filter, beam splitting filter reflects Rayleigh scattering light,
Raman scattering light transmission, Raman diffused light successively pass through Raman notch filtering light piece and the second light collecting lens, by the second light collecting lens
Entering the slit of fiber spectrometer after focusing, the silicon detector built in fiber spectrometer will test passed through Raman diffused light,
Form optical signal.
Memory card slot that the liquid crystal display and master board, main casing right side that the main casing front is equipped with are equipped with and
Data-interface；The optical signal that interior arrangement is formed is converted into electric signal image, and image is shown by liquid crystal display；
Specifically, the supplying cell is laser, liquid crystal display, flush type circuit and system master making sheet and light
Optical fiber spectrograph provides power supply, can power 4~12 hours, can external 220V mains-supplied data output.
Specifically, the laser has switch, and the output of laser is controlled by the switch button in master board.Swash
It is the laser of 785nm that light device, which can excite the wavelength with good monochromaticjty, and power is adjustable within the scope of 0~500mW；Power stability
Property control within 5%, to guarantee the good reproducibility of Raman spectrum.
Specifically, the described spectrometer probe includes the probe of shell and stainless steel material, and the output optical fiber built in probe connects
Optical fiber, beam splitting filter, Raman notch filtering light piece and light collecting lens are received, exciting light is used for transmission, collects scattering light.Spectrometer is visited
Button trigger device of the head by master board, optical gate switch control optical path.
Specifically, spectrometer probe uses butterfly encapsulation technology, and probe size reduces.On the one hand, reduce whole
The volume and weight of machine；On the other hand, the reduction of required refrigerating capacity also reduces the power consumption of complete machine.
Specifically, spectrometer probe is suitable for liquid, the signal acquisition of the samples such as solid and powder；With portable
Lightly, the advantages that being miniaturized, detecting accurate, quick and lossless measured object.
Specifically, it includes some non-uniform samples that the object under test, which is liquid, solid and powder sample, is such as broken
The end face of material forms and some samples for being not easy to direct sample.
Specifically, the fiber spectrometer high sensitivity (300000 microwatts/every millisecond of time of integration), investigative range
For 220~1160nm.
Specifically, the spectral analysis module cooling CCD is 10~45 DEG C low than room temperature.
Beneficial effect
1, a kind of miniature laser spectrometer has (170mm × 80mm × 25mm) small in size, light weight (350g), convenient for taking
Band, the wide (200~3200cm of detectable light spectral limit-1), high resolution (7~12cm-1), storage temperature section is wide by (- 40~+70
DEG C), the features such as detection accuracy high (being greater than 97%).
2, a kind of miniature laser spectrometer price provided by the invention is low, is conducive to promote and use on a large scale.
3, a kind of miniature laser spectrometer provided by the invention has the characteristics that detect accurate, quick and lossless measured object,
Scene, in-situ study can be achieved, can be used widely in multiple fields such as safety check, court exhibits detection, criminal evidence identifications.
Detailed description of the invention
Fig. 1 the invention patent miniature laser light path of optical spectrometer design drawing；
Fig. 2 the invention patent miniature laser spectrometer detects ammonium perchlorate Raman spectrogram；
Fig. 3 the invention patent miniature laser spectrometer detects nitrobenzene Raman spectrogram.
Wherein, 1-laser, 2-linearly purify optical filter, 3-beam splitting filters, the 4-the first light collecting lens, 5-drawings
Graceful notch filtering light piece, the 6-the second light collecting lens, 7-fiber spectrometers.
Specific embodiment
Below by specific embodiment, and cooperate attached drawing, the invention patent is described in detail.
Embodiment 1
Known ammonium perchlorate Raman spectrum characteristic peak information is as follows: 930cm-1The characteristic peak of corresponding perchlorate nearby；
1370cm-1Neighbouring characteristic peak is the rocking vibration peak of N-H.
In the present embodiment, select ammonium perchlorate (solid-state) as sample to be tested, before the probe of spectrometer 7 is placed in ammonium perchlorate
End is less than at 10mm.Switch in master board is opened, and the linear purification optical filter 2 of the laser that laser 1 issues reaches beam splitting
On optical filter 3, beam splitting filter 3 reflects light, and the light after reflection focuses on article table to be measured by the first light collecting lens 4
Face；Rayleigh scattering and Raman scattering occur for laser excitation article to be measured, and scattering light filters by the first light collecting lens 4 and beam splitting
Piece 3, beam splitting filter 3 reflect Rayleigh scattering light, and Raman scattering light transmission, Raman diffused light successively passes through Raman notch filtering light
Piece 5 and the second light collecting lens 6 enter the slit of fiber spectrometer 7, built in fiber spectrometer 7 after being focused by the second light collecting lens 6
Silicon detector will test passed through Raman diffused light, form optical signal.Formula system is internally embedded to obtained optical signal
Information processing is carried out, spectrogram as shown in Figure 2 can be finally obtained.
As shown in Figure 2, gained raman spectrum has good signal-to-noise ratio, and unique feature letter can be formed to ammonium perchlorate
Number, nearby there is apparent characteristic peak in 935cm-1 and 1370cm-1, respectively correspond perchlorate and N- in ammonium perchlorate
H；It coincide with Given information.
Embodiment 2
Known nitrobenzene Raman spectrum characteristic peak information is as follows: 1345cm-1The characteristic peak of corresponding nitro nearby；1590cm-1
Neighbouring characteristic peak corresponds to phenyl ring.
In the present embodiment, select nitrobenzene (liquid) as sample to be tested, it is small that the probe of spectrometer 7 is placed in nitrobenzene front end
At 10mm.Switch in master board is opened, and the linear purification optical filter 2 of the laser that laser 1 issues reaches beam splitting and filters
On piece 3, beam splitting filter 3 reflects light, and the light after reflection focuses on article surface to be measured by the first light collecting lens 4；
Rayleigh scattering and Raman scattering occur for laser excitation article to be measured, and scattering light passes through the first light collecting lens 4 and beam splitting filter
3, beam splitting filter 3 reflects Rayleigh scattering light, Raman scattering light transmission, and Raman diffused light successively passes through Raman notch filtering light piece
5 and second light collecting lens 6, enter the slit of fiber spectrometer 7 after being focused by the second light collecting lens 6, built in fiber spectrometer 7
Silicon detector will test passed through Raman diffused light, form optical signal.Be internally embedded formula system to obtained optical signal into
Row information processing, can finally obtain spectrogram as shown in Figure 3.
From the figure 3, it may be seen that gained raman spectrum have good signal-to-noise ratio, can p-nitrophenyl form unique characteristic signal,
1350cm-1And 1595cm-1Nearby there is apparent characteristic peak, respectively corresponds nitro and phenyl ring in nitrobenzene；With it is known
Information is coincide.
Apply that a specific example illustrates the principle and implementation of the invention in the present embodiment, above embodiments
Explanation be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (5)
1. a kind of miniature laser spectrometer, it is characterised in that: include: interior arrangement and main casing；Interior arrangement is placed in main casing
In；
Interior arrangement includes: laser, linearly purifies optical filter, beam splitting filter, the first light collecting lens, Raman notch filtering light
Piece, the second light collecting lens and fiber spectrometer；
The linear purification optical filter of the laser that laser issues reaches on beam splitting filter, and beam splitting filter reflects light, instead
Light after penetrating focuses on article surface to be measured by the first light collecting lens；Rayleigh scattering and drawing occur for laser excitation article to be measured
Graceful scattering, scattering light pass through the first light collecting lens and beam splitting filter, and beam splitting filter reflects Rayleigh scattering light, and Raman dissipates
Light transmission is penetrated, Raman diffused light successively passes through Raman notch filtering light piece and the second light collecting lens, after being focused by the second light collecting lens
Into the slit of fiber spectrometer, the silicon detector built in fiber spectrometer will test passed through Raman diffused light, form light
Signal；
The memory card slot and data that the liquid crystal display and master board, main casing right side that the main casing front is equipped with are equipped with
Interface；The optical signal that interior arrangement is formed is converted into electric signal image, and image is shown by liquid crystal display.
2. a kind of miniature laser spectrometer as described in claim 1, it is characterised in that: laser, which can excite, has good monochrome
Property wavelength be 785nm laser, power is adjustable within the scope of 0~500mW；Power stability controls within 5%, to guarantee
The good reproducibility of Raman spectrum.
3. a kind of miniature laser spectrometer as described in claim 1, it is characterised in that: the spectrometer is with probe, institute
The probe that probe includes shell and stainless steel material is stated, the output optical fiber, reception optical fiber, beam splitting filter, Raman are fallen into built in probe
Wave optical filter and light collecting lens are used for transmission exciting light, collect scattering light.
4. a kind of miniature laser spectrometer as claimed in claim 3, it is characterised in that: the probe encapsulates skill using butterfly
Art, probe size reduce；On the one hand, reduce the volume and weight of complete machine；On the other hand, the reduction of required refrigerating capacity also reduces
The power consumption of complete machine.
5. a kind of miniature laser spectrometer as described in claim 1, it is characterised in that: spectrum analysis built in the spectrometer
Module, the cooling CCD of spectral analysis module are 10~45 DEG C low than room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811090657.6A CN109374592A (en) | 2018-09-19 | 2018-09-19 | A kind of miniature laser spectrometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811090657.6A CN109374592A (en) | 2018-09-19 | 2018-09-19 | A kind of miniature laser spectrometer |
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| CN109374592A true CN109374592A (en) | 2019-02-22 |
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| CN201811090657.6A Pending CN109374592A (en) | 2018-09-19 | 2018-09-19 | A kind of miniature laser spectrometer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975210A (en) * | 2019-04-28 | 2019-07-05 | 重庆冠雁科技有限公司 | A kind of bare engine module of handheld Raman spectrometer |
| CN110749589A (en) * | 2019-11-26 | 2020-02-04 | 黎明职业大学 | Raman spectrum gem identification device and method thereof |
| CN112444512A (en) * | 2020-11-12 | 2021-03-05 | 山东大学 | Miniaturized laser Raman spectrum acquisition device and method |
| CN113820277A (en) * | 2021-09-14 | 2021-12-21 | 四川沃文特生物技术有限公司 | Data acquisition system and optical detection system for sample analyzer |
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| JPH08327550A (en) * | 1995-06-02 | 1996-12-13 | Tokai Carbon Co Ltd | Raman spectrometer |
| US20070236697A1 (en) * | 2006-04-10 | 2007-10-11 | Anis Zribi | Compact, hand-held Raman spectrometer microsystem on a chip |
| CN106124051A (en) * | 2016-08-31 | 2016-11-16 | 北京卓立汉光仪器有限公司 | A kind of small-sized Raman spectrometer |
| CN106290300A (en) * | 2016-08-04 | 2017-01-04 | 同方威视技术股份有限公司 | Portable raman spectrometer |
| CN206906248U (en) * | 2017-04-28 | 2018-01-19 | 上海复享光学股份有限公司 | Raman spectrometer |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08327550A (en) * | 1995-06-02 | 1996-12-13 | Tokai Carbon Co Ltd | Raman spectrometer |
| US20070236697A1 (en) * | 2006-04-10 | 2007-10-11 | Anis Zribi | Compact, hand-held Raman spectrometer microsystem on a chip |
| CN106290300A (en) * | 2016-08-04 | 2017-01-04 | 同方威视技术股份有限公司 | Portable raman spectrometer |
| CN106124051A (en) * | 2016-08-31 | 2016-11-16 | 北京卓立汉光仪器有限公司 | A kind of small-sized Raman spectrometer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975210A (en) * | 2019-04-28 | 2019-07-05 | 重庆冠雁科技有限公司 | A kind of bare engine module of handheld Raman spectrometer |
| CN110749589A (en) * | 2019-11-26 | 2020-02-04 | 黎明职业大学 | Raman spectrum gem identification device and method thereof |
| CN112444512A (en) * | 2020-11-12 | 2021-03-05 | 山东大学 | Miniaturized laser Raman spectrum acquisition device and method |
| CN112444512B (en) * | 2020-11-12 | 2022-04-12 | 山东大学 | Miniaturized laser Raman spectrum acquisition device and method |
| CN113820277A (en) * | 2021-09-14 | 2021-12-21 | 四川沃文特生物技术有限公司 | Data acquisition system and optical detection system for sample analyzer |
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Application publication date: 20190222 |