CN108414491A - Lower wave number Raman Measurement system - Google Patents
Lower wave number Raman Measurement system Download PDFInfo
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- CN108414491A CN108414491A CN201711418294.XA CN201711418294A CN108414491A CN 108414491 A CN108414491 A CN 108414491A CN 201711418294 A CN201711418294 A CN 201711418294A CN 108414491 A CN108414491 A CN 108414491A
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- 238000003841 Raman measurement Methods 0.000 title claims abstract description 12
- 238000001069 Raman spectroscopy Methods 0.000 claims abstract description 25
- 239000013307 optical fiber Substances 0.000 claims abstract description 20
- 239000000523 sample Substances 0.000 claims abstract description 19
- 230000005284 excitation Effects 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000003595 spectral effect Effects 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 description 8
- 238000001914 filtration Methods 0.000 description 5
- 238000001237 Raman spectrum Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000018199 S phase Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000001845 vibrational spectrum Methods 0.000 description 1
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
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- Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectrometry And Color Measurement (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
A kind of lower wave number Raman Measurement system, is related to technical field of spectral detection, and the solution is to the narrow technical problems of existing system investigative range.The system includes grating spectrograph, narrow-linewidth laser light source, lower wave number Raman probe；The lower wave number Raman probe includes input optical fibre, collimation lens, ASE gratings, noise reduction grating, condenser lens, trap grating, coupled lens, output optical fibre；The excitation light path of system, successively through input optical fibre, collimation lens, ASE gratings, noise reduction grating, condenser lens, reaches the focus point of condenser lens from narrow-linewidth laser light source；The light path of system is from the focus point of condenser lens, and line focus lens, noise reduction grating, trap grating, coupled lens, output optical fibre, reach grating spectrograph successively.System provided by the invention, investigative range is wide, and use occasion is extensive.
Description
Technical field
The present invention relates to spectrum detection techniques, more particularly to a kind of technology of lower wave number Raman Measurement system.
Background technology
Incident photon excites electronic to a upper state, and electronics transits to a lower state immediately, while launching scattered
Penetrate photon.If the initial state of electronics is identical as the energy level of final states, then scattered photon is equal with incident photon energy, referred to as Rayleigh dissipates
It penetrates；If electronics initial state is different from final states energy level, then scattered photon is different from incident photon energy, referred to as Raman scattering.Final states
When energy level is higher than initial level, scattered for Stokes Raman；It is anti-Stokes Raman when final states energy level is less than initial level
Scattering.Raman spectrum is a kind of vibrational spectra form, i.e. energy jump results from the vibration of molecule.Because of vibration and functional group's phase
It closes, when transition energy depicts spectrogram as, can be used to identify molecule, be referred to as molecular fingerprint.
Existing Raman spectrum measurement system generally comprises laser light source, light transmitting-receiving probe, spectrometer, and laser light source is as drawing
The excitation light source of graceful signal, light transmitting-receiving are provided with optical filter in popping one's head in, exciting light is interior after optical filter filters in light transmitting-receiving probe,
By condenser lens focusing illumination to sample surface, then by condenser lens collection Raman signal light, and use optical filter
Spectrometer is sent into after filtering, spectrometer is used for dispersive Raman signal light, detects Raman signal intensity at different wave length.
The defect of existing Raman spectrum measurement system is:
It is all multilayer dielectric film that due to light transmitting-receiving, probe module filtered inside piece, which uses, be limited by film material, film structure,
The rising or falling of the limitation of coating process, these filter performance curves is all relatively slower, and OD numbers are relatively low, generally
It can only accomplish 10-6, these have resulted in lower wave number（200cm-1 or less）Raman signal in range is blanked, can not be effective
It is detected, investigative range is relatively narrow, and the size popped one's head in is also larger, and occasion can be used also to be restricted.
Invention content
Defect present in for the above-mentioned prior art, technical problem to be solved by the invention is to provide a kind of detection models
Enclose wide lower wave number Raman Measurement system.
In order to solve the above-mentioned technical problem, a kind of lower wave number Raman Measurement system provided by the present invention, including grating light
Spectrometer, narrow-linewidth laser light source, lower wave number Raman probe, it is characterised in that：
The lower wave number Raman probe includes input optical fibre, collimation lens, ASE gratings, noise reduction grating, condenser lens, trap light
Grid, coupled lens, output optical fibre；
It is excitation light path that the system, which has two light paths, a light path therein, and another light path is light path；
The light channel structure of the excitation light path is：From narrow-linewidth laser light source, successively through input optical fibre, collimation lens, ASE
Grating, noise reduction grating, condenser lens, reach the focus point of condenser lens；
The light channel structure of the light path is：From the focus point of condenser lens, successively line focus lens, noise reduction grating,
Trap grating, coupled lens, output optical fibre reach grating spectrograph.
Lower wave number Raman Measurement system provided by the invention, using ASE gratings, noise reduction light in lower wave number Raman probe
Grid, trap grating realize that filtering, the mode of relatively traditional optical filter filtering have the characteristics that investigative range is wide.
Description of the drawings
Fig. 1 is the structural schematic diagram of the lower wave number Raman Measurement system of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the lower wave number Raman probe in the lower wave number Raman Measurement system of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the grating spectrograph in the lower wave number Raman Measurement system of the embodiment of the present invention.
Specific implementation mode
The embodiment of the present invention is described in further detail below in conjunction with description of the drawings, but the present embodiment is not used to limit
The system present invention, every similar structure using the present invention and its similar variation, should all be included in protection scope of the present invention, the present invention
In pause mark indicate the relationship of sum.
As Figure 1-Figure 2, a kind of lower wave number Raman Measurement system that the embodiment of the present invention is provided, including grating spectrum
Instrument 3, narrow-linewidth laser light source 1, lower wave number Raman probe 2, it is characterised in that：
The lower wave number Raman probe includes input optical fibre 20, collimation lens 21, ASE gratings 22, noise reduction grating 23, condenser lens
24, trap grating 26, coupled lens 27, output optical fibre 28；
It is excitation light path that the system, which has two light paths, a light path therein, and another light path is light path；
The light channel structure of the excitation light path is：From narrow-linewidth laser light source 1, successively through input optical fibre 20, collimation lens
21, ASE gratings 22, noise reduction grating 23, condenser lens 24 reach the focus point of condenser lens 24；
The light channel structure of the light path is：From the focus point of condenser lens 24, line focus lens 24, noise reduction light successively
Grid 23, trap grating 26, coupled lens 27, output optical fibre 28 reach grating spectrograph 3.
As shown in figure 3, in the embodiment of the present invention, the grating spectrograph 3 is the prior art, is that a kind of spectrum analysis is set
Standby, grating spectrograph 3 includes slit device 31, signal light reflection mirror 32, reflective glittering flat field grating 33, mirror condenser
34, imaging sensor 35；
In the embodiment of the present invention, the narrow-linewidth laser light source 1 is the prior art, the laser for emitting specific wavelength, such as wave
The laser of a length of 532nm, 785nm, 1064nm, transmitting laser as Raman signal exciting light by input optical fibre 20 into
Enter lower wave number Raman probe；
In the embodiment of the present invention, the ASE gratings 22, noise reduction grating 23, trap grating 26 are the prior art, ASE gratings 22
Can be by the optical diffraction in the centre wavelength pole close limit of incoming laser beam, and the clutters light such as filter out the ASE of spontaneous radiation generates very
Pure laser；Noise reduction grating 23 can be by the optical diffraction in incident laser beam centre wavelength pole close limit, while penetrating center
Light other than wavelength；Trap grating 26 can reflect the light of excitation wavelength center narrow range, and simultaneously by excitation wavelength other than
Light so that pure Raman signal light is passed through to filter out remaining optical excitation signal；
The operation principle of the embodiment of the present invention is as follows：
Sample 25 is placed in the focus point of condenser lens 24, the exciting light that narrow-linewidth laser light source 1 emits passes through input optical fibre 20
Into lower wave number Raman probe 2, collimated lens 21 are incident on ASE gratings 22 after collimating, and the only repellel of ASE gratings 22 is narrow to swash
The light of emission wavelength center range, to filter out the ASE light in excitation light source, purified exciting light is incident on noise reduction grating
On 23, from noise reduction grating 23, further simultaneously filtering clutter interferes back reflection to condenser lens 24 for purification, finally by condenser lens 24
The point for being focused into very little is irradiated on sample 25, to inspire Raman signal；
A part in the exciting light that sample 25 is sent out after being excited, which is focused after lens 24 collimate, injects noise reduction grating 23, excitation
Raman signal light in light can pass through noise reduction grating 23, and the scattering optrode in exciting light can pass through noise reduction grating 23 less, wear
The Raman signal light for crossing noise reduction grating 23 reaches trap grating 2, and coupled lens are reached after filtering out Rayleigh scattering by trap grating 26
27, it is coupled into output optical fibre 28；
After the signal light that output optical fibre 28 exports reaches grating spectrograph, slit device 31 is first passed through, then by signal light reflection mirror
32 reflex to after reflective glittering flat field grating 33 and generate dispersion, and the reflective glittering flat field grating of dispersion optical signals 33 is diffracted into
Dispersed light Signal Compression is reflexed to imaging sensor 35, by imaging sensor 35 by mirror condenser 34 by mirror condenser 34
By opto-electronic conversion after capture, the spectral data of the Raman signal light of a full spectral wavelength is formed.
Claims (1)
1. a kind of lower wave number Raman Measurement system, including grating spectrograph, narrow-linewidth laser light source, lower wave number Raman probe,
It is characterized in that：
The lower wave number Raman probe includes input optical fibre, collimation lens, ASE gratings, noise reduction grating, condenser lens, trap light
Grid, coupled lens, output optical fibre；
It is excitation light path that the system, which has two light paths, a light path therein, and another light path is light path；
The light channel structure of the excitation light path is：From narrow-linewidth laser light source, successively through input optical fibre, collimation lens, ASE
Grating, noise reduction grating, condenser lens, reach the focus point of condenser lens；
The light channel structure of the light path is：From the focus point of condenser lens, successively line focus lens, noise reduction grating,
Trap grating, coupled lens, output optical fibre reach grating spectrograph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711418294.XA CN108414491A (en) | 2017-12-25 | 2017-12-25 | Lower wave number Raman Measurement system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711418294.XA CN108414491A (en) | 2017-12-25 | 2017-12-25 | Lower wave number Raman Measurement system |
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| CN108414491A true CN108414491A (en) | 2018-08-17 |
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| CN201711418294.XA Pending CN108414491A (en) | 2017-12-25 | 2017-12-25 | Lower wave number Raman Measurement system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884027A (en) * | 2019-01-24 | 2019-06-14 | 浙江工业大学 | A kind of lower wave number Confocal laser-scanning microscopy instrument |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08327550A (en) * | 1995-06-02 | 1996-12-13 | Tokai Carbon Co Ltd | Raman spectrometer |
| US20090033928A1 (en) * | 2006-08-22 | 2009-02-05 | Masud Azimi | Raman spectrometry assembly |
| CN102374901A (en) * | 2011-09-22 | 2012-03-14 | 中国科学院半导体研究所 | Single-grating Raman spectrum testing system for measuring low-wave-number Raman signals |
| CN102445273A (en) * | 2011-09-22 | 2012-05-09 | 中国科学院半导体研究所 | Device for measuring low-wavenumber Raman signal |
| CN105651759A (en) * | 2016-03-24 | 2016-06-08 | 上海如海光电科技有限公司 | Surface-enhanced type Raman spectrum testing system |
| CN206177461U (en) * | 2016-08-31 | 2017-05-17 | 北京卓立汉光仪器有限公司 | Small-size raman spectroscopy appearance |
| CN107091828A (en) * | 2017-05-23 | 2017-08-25 | 国家纳米科学中心 | One kind freezing lower wave number Raman spectrum test system and its method of testing |
| CN207689375U (en) * | 2017-12-25 | 2018-08-03 | 上海如海光电科技有限公司 | Lower wave number Raman Measurement system |
-
2017
- 2017-12-25 CN CN201711418294.XA patent/CN108414491A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08327550A (en) * | 1995-06-02 | 1996-12-13 | Tokai Carbon Co Ltd | Raman spectrometer |
| US20090033928A1 (en) * | 2006-08-22 | 2009-02-05 | Masud Azimi | Raman spectrometry assembly |
| CN102374901A (en) * | 2011-09-22 | 2012-03-14 | 中国科学院半导体研究所 | Single-grating Raman spectrum testing system for measuring low-wave-number Raman signals |
| CN102445273A (en) * | 2011-09-22 | 2012-05-09 | 中国科学院半导体研究所 | Device for measuring low-wavenumber Raman signal |
| CN105651759A (en) * | 2016-03-24 | 2016-06-08 | 上海如海光电科技有限公司 | Surface-enhanced type Raman spectrum testing system |
| CN206177461U (en) * | 2016-08-31 | 2017-05-17 | 北京卓立汉光仪器有限公司 | Small-size raman spectroscopy appearance |
| CN107091828A (en) * | 2017-05-23 | 2017-08-25 | 国家纳米科学中心 | One kind freezing lower wave number Raman spectrum test system and its method of testing |
| CN207689375U (en) * | 2017-12-25 | 2018-08-03 | 上海如海光电科技有限公司 | Lower wave number Raman Measurement system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884027A (en) * | 2019-01-24 | 2019-06-14 | 浙江工业大学 | A kind of lower wave number Confocal laser-scanning microscopy instrument |
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Application publication date: 20180817 |