CN107643275A - A kind of integral type Raman optical-mechanical system - Google Patents
A kind of integral type Raman optical-mechanical system Download PDFInfo
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- CN107643275A CN107643275A CN201610687390.3A CN201610687390A CN107643275A CN 107643275 A CN107643275 A CN 107643275A CN 201610687390 A CN201610687390 A CN 201610687390A CN 107643275 A CN107643275 A CN 107643275A
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- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 44
- 230000003287 optical effect Effects 0.000 claims abstract description 52
- 239000004065 semiconductor Substances 0.000 claims abstract description 27
- 239000006185 dispersion Substances 0.000 claims abstract description 18
- 238000004458 analytical method Methods 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims abstract description 7
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- 239000000835 fiber Substances 0.000 claims abstract description 6
- 230000005284 excitation Effects 0.000 claims description 10
- 238000001237 Raman spectrum Methods 0.000 claims description 6
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- 238000001228 spectrum Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000010183 spectrum analysis Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
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- 230000013011 mating Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 2
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- 238000001514 detection method Methods 0.000 description 3
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- 238000002834 transmittance Methods 0.000 description 2
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- 229910001751 gemstone Inorganic materials 0.000 description 1
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Abstract
The invention provides a kind of integral type Raman optical-mechanical system, including semiconductor laser light resource, the first optical system, Volume Bragg grating, dichroic mirror, the second optical system, protecting window, long wave pass filter, the 3rd optical system, slit, dispersion compensation module, detector, analysis and processing module, semiconductor cooler, housing, photodetector, light source drive control module.The system of the present invention realizes Raman laser light source, Raman probe, spectrometer it is highly integrated, eliminate the Raman interference that the coupling loss between part and Transmission Fibers introduce, compact-sized, small volume, improve capacity usage ratio and the sensitivity of system.
Description
Technical field
The present invention relates to the Raman detection optical-mechanical system in optical devices technologies field, more particularly to a kind of integral type.
Background technology
Raman spectrum detects the identification and detection for being widely used in biology, mineral, chemical substance.Based on Raman spectrum point
The Raman optical-mechanical system of analysis technology food security, biological medicine, public safety, material science, gemstone testing, geological exploration,
The fields such as environment measuring have a good application prospect.
It is more and more stronger with the extension of application demand, the miniature requirement of Raman optical-mechanical system with the development of science and technology
It is strong.The excitation source used in Raman optical-mechanical system is mostly the light source module of individual packages, and Raman signal excites collection module, drawn
Graceful spectral analysis module is also typically what is separated each other, is connected between each module using Transmission Fibers.This structuring limits
The miniaturization of Raman optical-mechanical system, and coupling, the docking of Transmission Fibers can cause the loss and interference of optical signal, reduce system
Capacity usage ratio and sensitivity.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of compact-sized, high integration, miniaturization
Integral type Raman optical-mechanical system.It directly passes through optical system and long wave pass filter, color using by semiconductor laser light resource
The mode of module installation in the housing is dissipated, system architecture is simplified, eliminates the influence and interference of Transmission Fibers, be advantageous to equipment
Miniaturization, improve the performance of Raman optical-mechanical system.
To achieve the above object, the technical solution adopted by the present invention is that it includes：Semiconductor laser light resource, the first optics
It is system, Volume Bragg grating, dichroic mirror, the second optical system, protecting window, long wave pass filter, the 3rd optical system, narrow
Seam, dispersion compensation module, detector, analysis and processing module, semiconductor cooler TEC, housing, photodetector, light source drive control
Module.
Further, first optical system, Volume Bragg grating, dichroic mirror, the second optical system, protecting window according to
Secondary coaxial set forms excitation light path, the coaxial front end for being arranged on excitation light path of LASER Light Source；The long wave pass filter, the 3rd
Coaxial set of optical system, slit forms collection light path, is disposed vertically with excitation light path, the dispersion compensation module, detector are formed
Spectrum analysis light path, positioned at the end for collecting light path.
Further, the semiconductor laser light resource directly passes through optical system and the logical filter of long wave without fiber coupling
Mating plate, dispersion compensation module are installed along with housing.
Further, first optical system can realize the collimation or spot shaping of the semiconductor laser light resource, institute
State the second optical system（Optical coupling will be excited, focus on detected space, the Raman scattering that the 3rd optical system will be collected into
Light converges to the slit, and the dispersion compensation module realizes the dispersion of Raman spectrum, and the spectral information after separation is delivered into institute
State detector.
Further, the position of first optical system and Volume Bragg grating can exchange.
Further, the semiconductor cooler（TEC）The semiconductor laser light resource and the detection can be controlled simultaneously
Device, it is possible to use two TEC are controlled respectively.
Further, the light source drive control module is used to drive the semiconductor laser light resource, and passes through the light
The reponse system of electric explorer composition, control the stability of the semiconductor laser light resource power output.The photodetector
With narrow-band filtering function, influence of the raman scattering spectrum to detector reception signal can be eliminated.
Further, the analysis and processing module is used to control detector, and analyzes and processes what the detector received
Information exports for system.
The present invention operation principle be：Light source drive control module drive control LASER Light Source produces exciting light, exciting light
The first optical system, Volume Bragg grating, dichroic mirror, the second optical system, protecting window are passed sequentially through, the second optical system will
Exciting light focuses on sample, and sample, which is excited after light excites, occurs Raman scattering, and caused Raman diffused light connects
Enter Raman optical-mechanical system through protecting window with Rayleigh scattering light together opposite direction, collected by the second optical system, then pass through
After dichroic mirror, Rayleigh scattering light is filtered out by long wave pass filter, remaining Raman diffused light is converged by the 3rd optical system
Onto slit.Through realizing that spectrum separates into dispersion compensation module after slit filtering, received via detector, pass through follow-up point
Analysis processing module analyzes and processes to reception signal.The semiconductor cooler installed in housing realizes the temperature to whole system
Control.
After said structure, beneficial effects of the present invention are：Reduce LASER Light Source, excite receiving module and spectrum point
The packaging technology and structure early stage of module is analysed, is reduced significantly the volume of optical-mechanical system, and reduce the cost of Raman optical-mechanical system；
, using light source, sharp receiving module, the unified structure of spectral analysis module improves the capacity usage ratio of light source, and reduces and set for it
Device in standby, further simplify device structure, reduce cost, be very beneficial for the miniaturization of equipment and the raising of performance.
Brief description of the drawings
Fig. 1 show the schematic diagram of integral type Raman optical-mechanical system according to an embodiment of the invention.
Embodiment
According to the integral type Raman optical-mechanical system of the present invention, structure includes：Semiconductor laser light resource, the first optical system,
Volume Bragg grating, dichroic mirror, the second optical system, protecting window, long wave pass filter, the 3rd optical system, slit, dispersion
Module, detector, analysis and processing module, semiconductor cooler TEC, housing, photodetector, light source drive control module.
First optical system, Volume Bragg grating, dichroic mirror, the second optical system, protecting window are coaxial successively to be set
Put composition excitation light path, the coaxial front end for being arranged on excitation light path of LASER Light Source；The long wave pass filter, the 3rd optical system
Coaxial set of system, slit forms collection light path, is disposed vertically with excitation light path, the dispersion compensation module, detector form spectrum point
Light path is analysed, positioned at the end for collecting light path.
Described LASER Light Source is semiconductor laser or the light source that can produce exciting light.
Described dichroic mirror has high transmittance to exciting light, has high reflection to Raman diffused light caused by sample
Rate, forward direction passes through exciting light in the optical path for it, passes through Rayleigh scattering light backwards and reflects Raman diffused light.
Described the first optical system, the second optical system, the 3rd optical system can be spherical lens, non-spherical lens
Or the microscope group of the composition such as sphere, non-spherical lens, cylindrical mirror, prism；The effect of first optical system is to realize described half
The collimation or spot shaping of conductor Laser light source；The effect of second optical system be will excite optical coupling, focus on it is tested
Space, and collect Raman scattering signal；The effect of 3rd optical system is that the Raman diffused light that will be collected into converges to institute
State slit.The dispersion compensation module realizes the dispersion of Raman spectrum, and the spectral information after separation is delivered into the detector.
Be coated with described protecting window all has high transmittance to Raman diffused light caused by exciting light and sample
Anti-reflection film；Its effect is that Raman optical-mechanical system is sealed and protected.
The position of first optical system and Volume Bragg grating can exchange.
The semiconductor cooler（TEC）The semiconductor laser light resource and the detector can be controlled simultaneously, can also be made
Controlled respectively with two TEC.
Further, the light source drive control module is used to drive the semiconductor laser light resource, and passes through the light
The reponse system of electric explorer composition, control the stability of the semiconductor laser light resource power output.The photodetector
With narrow-band filtering function, influence of the raman scattering spectrum to detector reception signal can be eliminated.
Further, the analysis and processing module is used to control detector, and analyzes and processes what the detector received
Information exports for system.
The operation principle of the present embodiment is：Exciting light caused by light source drive control module control LASER Light Source passes sequentially through
First optical system, Volume Bragg grating, dichroic mirror, the second optical system, protecting window, the second optical system gather exciting light
Jiao is in sample, and sample, which is excited after light excites, occurs Raman scattering, and caused Raman diffused light dissipates together with Rayleigh
Penetrating light, opposite direction enters Raman optical-mechanical system through protecting window together, is collected by the second optical system, then after dichroic mirror,
Rayleigh scattering light is filtered out by long wave pass filter, remaining Raman diffused light is converged on slit by the 3rd optical system.
Through entering dispersion compensation module after slit filtering, dispersion compensation module is realized the separation and transmission of Raman spectrum, received via detector, leads to
Later continuous analysis and processing module is handled reception signal.The semiconductor cooler installed in housing is realized to whole system
Temperature control.The present embodiment can realize high-performance, the Raman optical-mechanical system of miniaturization.
The preferred embodiment of patent of the present invention is the foregoing is only, is not intended to limit the invention patent, for this area
Technical staff, patent of the present invention can have various modifications and variations.All spirit in patent of the present invention is made with principle
Any modification, equivalent substitution and improvements etc., should be included within the protection domain of patent of the present invention.
Claims (8)
1. a kind of integral type Raman optical-mechanical system, it is characterised in that it includes semiconductor laser light resource（101）, the first optical system
（102）, Volume Bragg grating（103）, dichroic mirror (104), the second optical system (105), protecting window (106), the logical filter of long wave
Mating plate (107), the 3rd optical system (108), slit（109）, dispersion compensation module（110）, detector（111）, analysis and processing module
（112）、TEC（113）, housing（114）, photodetector（115）, light source drive control module（116）.
A kind of 2. integral type Raman optical-mechanical system according to claim 1, it is characterised in that first optical system
（102）, Volume Bragg grating（103）, dichroic mirror (104), the second optical system (105), protecting window (106) is coaxial successively sets
Put composition excitation light path, the coaxial front end for being arranged on excitation light path of LASER Light Source (101)；Long wave pass filter (107), the 3rd light
System (108), slit（109）, it is coaxial set form collect light path, be disposed vertically with excitation light path, dispersion compensation module（110）、
Detector（111）Spectrum analysis light path is formed, positioned at the end for collecting light path.
A kind of 3. integral type Raman optical-mechanical system according to claim 1, it is characterised in that the semiconductor laser light resource
（101）Without fiber coupling, directly pass through optical system and long wave pass filter (107), dispersion compensation module（110）Integrate together
In housing（114）In, dry gas is full of in housing and is sealed.
A kind of 4. integral type Raman optical-mechanical system according to claim 1, it is characterised in that first optical system
（102）The semiconductor laser light resource can be achieved（101）Collimation or spot shaping, second optical system（105）It will swash
Luminous coupling, focus on detected space, the 3rd optical system（108）The Raman diffused light being collected into is converged to described narrow
Seam（109）, the dispersion compensation module（110）The dispersion of Raman spectrum is realized, and the spectral information after separation is delivered to the spy
Survey device（111）.
A kind of 5. integral type Raman optical-mechanical system according to claim 1, it is characterised in that first optical system
（102）With Volume Bragg grating（103）Position can exchange.
6. a kind of integral type Raman optical-mechanical system according to claim 1, it is characterised in that it also includes being used for temperature control
The semiconductor cooler of system（TEC）（113）, the semiconductor laser light resource can be controlled simultaneously（101）With the detector
（111）, it is possible to use two TEC are controlled respectively.
A kind of 7. integral type Raman optical-mechanical system according to claim 1, it is characterised in that the light source drive control mould
Block（116）For driving the semiconductor laser light resource（101）, and pass through the photodetector（115）The feedback system of composition
System, controls the semiconductor laser light resource（101）The stability of power output；The photodetector（115）Filtered with arrowband
Wave energy, influence of the raman scattering spectrum to detector reception signal can be eliminated.
A kind of 8. integral type Raman optical-mechanical system according to claim 1, it is characterised in that the analysis and processing module
（112）For controlling detector（111）, and analyze and process the detector（111）The information received exports for system.
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| CN201610687390.3A CN107643275A (en) | 2016-08-19 | 2016-08-19 | A kind of integral type Raman optical-mechanical system |
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| CN201610687390.3A CN107643275A (en) | 2016-08-19 | 2016-08-19 | A kind of integral type Raman optical-mechanical system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489613A (en) * | 2018-02-05 | 2018-09-04 | 中国科学院长春光学精密机械与物理研究所 | A kind of volume holographic grating type space heterodyne Raman spectroscopy instrument light channel structure |
| CN112834480A (en) * | 2020-12-31 | 2021-05-25 | 中国科学院合肥物质科学研究院 | Confocal Raman system for high-pressure normal-temperature and low-temperature experiments and measurement method thereof |
| EP4085237A4 (en) * | 2019-12-31 | 2024-05-08 | Tornado Spectral Systems, Inc. | Apparatus and method for reducing interference in an optical spectroscopy probe having a collimated sample beam |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489613A (en) * | 2018-02-05 | 2018-09-04 | 中国科学院长春光学精密机械与物理研究所 | A kind of volume holographic grating type space heterodyne Raman spectroscopy instrument light channel structure |
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| EP4085237A4 (en) * | 2019-12-31 | 2024-05-08 | Tornado Spectral Systems, Inc. | Apparatus and method for reducing interference in an optical spectroscopy probe having a collimated sample beam |
| CN112834480A (en) * | 2020-12-31 | 2021-05-25 | 中国科学院合肥物质科学研究院 | Confocal Raman system for high-pressure normal-temperature and low-temperature experiments and measurement method thereof |
| CN112834480B (en) * | 2020-12-31 | 2023-02-03 | 中国科学院合肥物质科学研究院 | Confocal Raman system for high-pressure normal-temperature and low-temperature experiments and measurement method thereof |
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