CN204028004U - A kind of substance detecting apparatus based on Raman filtering - Google Patents
A kind of substance detecting apparatus based on Raman filtering Download PDFInfo
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- CN204028004U CN204028004U CN201420425128.8U CN201420425128U CN204028004U CN 204028004 U CN204028004 U CN 204028004U CN 201420425128 U CN201420425128 U CN 201420425128U CN 204028004 U CN204028004 U CN 204028004U
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- raman
- detecting apparatus
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Abstract
The utility model discloses a kind of substance detecting apparatus based on Raman filtering, comprise light source, Raman filter plate and photoelectric sensor, scattered light is generated after described light source outgoing beam is incident to test substance, be provided with spectroscope between described light source and described test substance, the reflected light path of described scattered light after described dichroic mirror is disposed with described Raman filter plate and described photoelectric sensor.A kind of substance detecting apparatus based on Raman filtering of the present utility model without the need to beam splitter, without the need to linear array photoelectric sensors, apparatus structure is simple, build that flexibility ratio is high, device volume is easy to microminiaturized, realize cost low, be convenient to integrated and Function Extension.
Description
Technical field
The utility model belongs to optical technical field, relate to a kind of substance detecting apparatus, particularly based on a non-gaseous matter pick-up unit for Raman optical filter filtering, the non-gaseous matter be mainly used in the fields such as food security, environmental monitoring, quality control, biochemical analysis, life science, medicine, energy-saving and emission-reduction, process control, risk assessment detects.
Background technology
Non-gaseous matter detects demand and is extensively present in the fields such as food security, environmental monitoring, quality control, biochemical analysis, life science, medicine, energy-saving and emission-reduction, process control, risk assessment, and plays very important effect to association area development.In online technique, exist based on the non-gaseous matter pick-up unit of Raman, for example, see the portable non-gaseous matter laser raman pick-up unit mentioned in the 331st page in " chemometrics method and Molecular Spectral Analysis technology " book of writing of Chu little Li has: the InPhotote of the Portable Raman spectrometer of B & W Tek company, Thermo TruScan Portable Raman spectrometer, Agiltron company RSL PLUS Portable Raman spectrometer, U.S. DeltaNu company Inspector Portable Raman spectrometer, Inphotonics company
tMportable Raman spectrometer this in first technology, there is certain advantage, but still exist some essence not pedal system only all adopt the spectral detection principle containing dispersion element, detect wide spectral information, use linear array photoelectricity optical flame detector, cause system architecture complicated, build that flexibility ratio is not high, device volume is difficult to microminiaturization, realize that cost is high, the degree of modularity is not high, the scope of application is influenced, it is integrated to be not easy to and Function Extension.
Prior art adopts the spectral detection principle containing dispersion element, detect wide spectral information, use linear array photoelectricity optical flame detector, cause system architecture complicated, build that flexibility ratio is not high, device volume is difficult to microminiaturization, realize that cost is high, the degree of modularity is not high, the scope of application is influenced, it is integrated to be not easy to and Function Extension.The utility model adopts raman signatures spectrum extractive technique, based on the filtering of Raman filter plate, scattered light is through Raman filter plate, characteristic spectrum light beam is filtered out, receive Raman spectrum information by photoelectric sensor, obtain test substance information, therefore, this device without the need to beam splitter, without the need to linear array photoelectric sensors, apparatus structure is simple, build that flexibility ratio is high, device volume is easy to microminiaturized, realize cost low, be convenient to integrated and Function Extension.
Utility model content
The utility model proposes a kind of substance detecting apparatus based on Raman filtering for the technical matters existed in prior art, and concrete scheme is as follows:
A kind of substance detecting apparatus based on Raman filtering, comprise light source, Raman filter plate and photoelectric sensor, scattered light is generated after described light source outgoing beam is incident to test substance, be provided with spectroscope between described light source and described test substance, the reflected light path of described scattered light after described dichroic mirror is disposed with described Raman filter plate and described photoelectric sensor.
Basic conception of the present utility model is: adopt raman signatures spectrum extractive technique, based on Raman optical filter (narrow band pass filter, the Raman diffused light of specific band is obtained for filtering) filtering, light source outgoing beam is irradiated to on-gaseous test substance, test substance is through incident light effect generation scattering effect and outgoing scattered light, optical path direction changes after the dichroic mirror being placed in light path to excite the scattered light (returning along optical path of incident light is reverse) obtained, scattered light after reflection is through Raman optical filter optical filtering (the Raman scattering light transmission of specific band, other scattered light ends), raman signatures spectrum light beam is filtered out, by photoelectric sensor receive feature Raman spectral information, and obtain tested substance information afterwards by analysis.Between light source and test substance, arrange spectroscope can make exciting light and detector in sample the same side, is convenient to build sonde-type device and shortens system light path thus make system microminiaturized.This device without the need to beam splitter (device by the light beam of each wave band is separated according to different angles or different time), without the need to linear array photoelectric sensors, apparatus structure is simple, build that flexibility ratio is high, device volume is easy to microminiaturized, realize cost low, be convenient to integrated and Function Extension.
As preferably, described test substance periphery is covered with axis and is positioned in described light path and the opening paraboloid of revolution towards described light source direction, and described determinand is positioned at the focus area of the described paraboloid of revolution.The scattered light (to all directions critical dimensions) obtained is excited to propagate towards optical path of incident light direction after the paraboloid of revolution reflection being placed in test substance periphery, the Raman diffused light that this paraboloid of revolution produces for focusing on enrichment.
As preferably, between described light source and described spectroscope, be provided with light-beam forming unit.Light-beam forming unit is used for carrying out shaping to light source outgoing beam, as expanded, collimation etc., to meet the requirement of system to light source outgoing beam.
As preferably, between described spectroscope and described test substance, be provided with the first condenser lens.The effect of this first condenser lens comprises two aspects, and on the one hand, before projecting test substance after incident beam is through spectroscope, the first condenser lens can by incident beam focus to test substance put area, to strengthen scattering effect; On the other hand, after scattering effect occurs, scattered light is along all directions scattering, now the scattering of propagating along the reverse side of incident beam light path can focus on by the first condenser lens, and make scattered light focus on spectroscope, thus make more scattered light enter subsequent optical system, to make testing result remarkable.
As preferably, between described spectroscope and described Raman filter plate, be provided with the second condenser lens.This second condenser lens be placed in spectroscope after for focusing on scattered light, its essence is that collecting more Raman diffused light enters subsequent optical path system, to improve device light signal strength further, improving device detection perform.
As preferably, described filter plate is to the sensitive surface being affixed on described photoelectric sensor, and the size of described filter plate is greater than the size of the sensitive surface of described photoelectric sensor.Make the size of filter plate slightly larger than the sensitive surface size of photoelectric sensor before filter plate is close to photoelectric sensor sensitive surface, the object so arranged is: on the one hand, reduce the size of filter plate as far as possible to reduce system cost; On the other hand, filtering other veiling glares except raman signatures spectral dispersion light (target beam), reduce system noise.
As preferably, the angle of described spectroscope and described light beam of light source emitting light path is 45 degree.Spectroscope becomes the external structure being convenient to light path system when 45 degree to design with light path angle.
Compared with prior art, advantage of the present utility model:
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of substance detecting apparatus based on Raman filtering of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Be illustrated in figure 1 a kind of substance detecting apparatus structural representation based on Raman filtering of the utility model embodiment, comprise laser instrument 1, along the paraboloid of revolution 9 laser instrument 1 outgoing beam direction being disposed with light-beam forming unit 2, spectroscope 3, first condenser lens 4, test substance 5 and be located at outside test substance 5, test substance 5 is positioned at the focus area of the paraboloid of revolution 5; laser instrument 1 outgoing beam first focuses to test substance 5 region through spectroscope 3 through the first condenser lens 4 after light-beam forming unit 2 shaping, scattering effect is there is and sends scattered light to all directions in test substance 5 after incident light excites, scattered light is propagated along the reverse side of input path and after the first condenser lens 4 focusing collector, projects the reflecting surface of spectroscope 3 and reflect after the paraboloid of revolution 9 reflects, the reflected light path direction of scattered light is provided with the second condenser lens 6 successively, Raman filter plate 7 and photoelectric sensor 8, scattered light after spectroscope 3 reflects focuses to the sensitive surface of photoelectric sensor 8 through the second condenser lens 6, the Raman filter plate of size slightly larger than sensitive surface size is glued with before the sensitive surface of photoelectric sensor 8, Raman filter plate 7 is for filtering other light beams except having the Raman diffused light of raman signatures spectrum, comprise other scattered lights (as Rayleigh scattering light) and environment veiling glare, photoelectric sensor 8 receives Raman spectrum information by sensitive surface, and analysis obtains test substance information.
Wherein, laser instrument 1 adopts diode laser, and wavelength is 785 nanometers; Spectroscope 3 is 45 degree with the angle of input path; Raman filter plate 7 adopts interfere type narrow band pass filter, parameter OD5; Photodetector 8 adopts snowslide pipe.
Above-described embodiment has been described in detail the technical solution of the utility model and beneficial effect; be understood that and the foregoing is only most preferred embodiment of the present utility model; be not limited to the utility model; all make in spirit of the present utility model any amendment, supplement and equivalent to replace, all should be included within protection domain of the present utility model.
Claims (7)
1. the substance detecting apparatus based on Raman filtering, comprise light source, Raman filter plate and photoelectric sensor, scattered light is generated after described light source outgoing beam is incident to test substance, it is characterized in that, be provided with spectroscope between described light source and described test substance, the reflected light path of described scattered light after described dichroic mirror is disposed with described Raman filter plate and described photoelectric sensor.
2. a kind of substance detecting apparatus based on Raman filtering according to claim 1, it is characterized in that, described test substance periphery be covered with axis to be positioned in described light path and opening towards the paraboloid of revolution of described light source direction, described test substance is positioned at the focus area of the described paraboloid of revolution.
3. a kind of substance detecting apparatus based on Raman filtering according to claim 1, is characterized in that, be provided with light-beam forming unit between described light source and described spectroscope.
4. a kind of substance detecting apparatus based on Raman filtering according to claim 1, is characterized in that, be provided with the first condenser lens between described spectroscope and described test substance.
5. a kind of substance detecting apparatus based on Raman filtering according to claim 1, is characterized in that, be provided with the second condenser lens between described spectroscope and described Raman filter plate.
6. a kind of substance detecting apparatus based on Raman filtering according to claim 1, is characterized in that, described filter plate is to the sensitive surface being affixed on described photoelectric sensor, and the size of described filter plate is greater than the size of the sensitive surface of described photoelectric sensor.
7. a kind of substance detecting apparatus based on Raman filtering according to claim 1, is characterized in that, the angle of described spectroscope and described light beam of light source emitting light path is 45 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420425128.8U CN204028004U (en) | 2014-07-25 | 2014-07-25 | A kind of substance detecting apparatus based on Raman filtering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420425128.8U CN204028004U (en) | 2014-07-25 | 2014-07-25 | A kind of substance detecting apparatus based on Raman filtering |
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| CN204028004U true CN204028004U (en) | 2014-12-17 |
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| CN201420425128.8U Expired - Fee Related CN204028004U (en) | 2014-07-25 | 2014-07-25 | A kind of substance detecting apparatus based on Raman filtering |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338501A (en) * | 2016-03-23 | 2017-01-18 | 北京杏林睿光科技有限公司 | Novel Raman probe with light source |
| CN109596598A (en) * | 2019-01-07 | 2019-04-09 | 武汉大学 | A kind of portable mono wavelength Raman photometer based on SERS |
| CN112600995A (en) * | 2020-12-04 | 2021-04-02 | Oppo广东移动通信有限公司 | Camera assembly, calibration method thereof and electronic equipment |
-
2014
- 2014-07-25 CN CN201420425128.8U patent/CN204028004U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338501A (en) * | 2016-03-23 | 2017-01-18 | 北京杏林睿光科技有限公司 | Novel Raman probe with light source |
| CN109596598A (en) * | 2019-01-07 | 2019-04-09 | 武汉大学 | A kind of portable mono wavelength Raman photometer based on SERS |
| CN112600995A (en) * | 2020-12-04 | 2021-04-02 | Oppo广东移动通信有限公司 | Camera assembly, calibration method thereof and electronic equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20200725 |
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| CF01 | Termination of patent right due to non-payment of annual fee |