CN201222037Y - Raman spectrum system - Google Patents
Raman spectrum system Download PDFInfo
- Publication number
- CN201222037Y CN201222037Y CNU2008201088999U CN200820108899U CN201222037Y CN 201222037 Y CN201222037 Y CN 201222037Y CN U2008201088999 U CNU2008201088999 U CN U2008201088999U CN 200820108899 U CN200820108899 U CN 200820108899U CN 201222037 Y CN201222037 Y CN 201222037Y
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- raman
- raman spectrum
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- inspection center
- probe
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Abstract
The utility model relates to a Raman spectroscopy system comprising a detecting center, an analyzing device and at least one detection terminal, wherein the detecting center comprising at least one light source is used to output exciting light for exciting a detected object to generate Raman diffused light, the analyzing device is used to obtain the Raman spectroscopy of the detected object, each detection terminal comprises at least one Raman probe, the Raman probe can lead the exciting light to the detected object and transmit the Raman diffused light generated by the detected object to the detecting center.
Description
Technical field
The utility model relates to a kind of Raman spectrum system.The utility model also relates to a kind of method of utilizing the Raman spectrum of this systematic survey checking matter.
Background technology
Scattering can take place when illumination was mapped on the material.When scattering took place, most of scattering light wavelength did not change, and the scattering that this wavelength does not change is called Rayleigh scattering; Small part scattering light wavelength can increase or reduce, and the scattering that this wavelength changes is called Raman scattering, and its corresponding spectrum is called Raman spectrum.Raman spectrum belongs to the vibrational spectrum of molecule.Each material all has the feature Raman spectrum of oneself, so Raman spectrum can be used as " fingerprint " of recognition material.
The ability of Raman spectrum recognition material depends on the resolution of Raman spectrum analysis instrument.The focal length of resolution and spectroanalysis instrument, grating line number etc. are relevant.Generally speaking, in order to improve resolution, need to adopt the enough big Raman spectrum analysis instrument of focal length, at this moment the volume of whole system will inevitably increase, thereby has lost portability.In addition, part optical element in the Raman spectrum analysis instrument costs an arm and a leg, and the cleanliness factor of environment, temperature, humidity etc. are required comparatively harsh, influenced of the application of Raman spectrum analysis instrument in fields such as safety inspection, environmental monitoring, chemical analysis, drug test, food inspection.
The utility model content
The purpose of this utility model provides a kind of Raman spectrum system, and this system can take into account resolution and portability, and can adapt to the requirement at the detection scene of varying environment, and can not be subjected to the restriction that the cleanliness factor, temperature, humidity etc. of environment require.
According to an aspect of the present utility model, a kind of Raman spectrum system is provided, comprise inspection center, comprise at least one light source, be used to export the exciting light that excites checking matter to produce Raman diffused light; Analytical equipment is used to obtain the Raman spectrum of checking matter.Also comprise at least one sense terminals, each sense terminals comprises at least one Raman probe, and described each Raman probe guides to checking matter with exciting light, and the Raman diffused light that checking matter is produced sends back inspection center.
According to preferred implementation of the present utility model, described inspection center also comprises beam splitter, is used for the exciting light of light source output is divided into multi beam.
According to preferred implementation of the present utility model, described beam splitter comprises one or more levels beam splitter, when beam splitter when being multistage, can between the two-stage beam splitter power amplifier be set, and is used to amplify exciting light.
According to preferred implementation of the present utility model, described inspection center also comprises control device, is used to control the operation of described at least one light source and analytical equipment, and the Raman spectrum that analytical equipment obtains is handled.
According to preferred implementation of the present utility model, described control device has the storer that is used for storage standards Raman spectrum data storehouse, when described control device is handled the Raman spectrum that analytical equipment obtained, the Raman spectrum of checking matter is compared with the standard Raman spectrum that reads from storer, to determine whether this checking matter contains against regulation material.
According to preferred implementation of the present utility model, described inspection center also comprises: converter, and the Raman spectrum that is used to change after described Raman spectrum also will be changed sends control device to; Communicator is used for transmitting data between inspection center and sense terminals.
According to preferred implementation of the present utility model, described control device sends comparative result to separately sense terminals respectively by described communicator.
According to preferred implementation of the present utility model, described sense terminals also comprises: controller, and be used for receiving and detect instruction, control described at least one Raman probe; Communicator is used for transmitting data between inspection center and sense terminals.
According to preferred implementation of the present utility model, described communicator is wire communication device or radio communication device.
According to preferred implementation of the present utility model, described inspection center also comprises coupling device, be used for to be coupled to from the exciting light of light source described at least one Raman probe, and will send analytical equipment to from the Raman diffused light of described at least one Raman probe.
The utility model has solved the contradiction between traditional Raman spectrum analysis instrument portability and the resolution, because cause traditional Raman spectrum analysis instrument bulky to high-resolution requirement in the prior art, be unfavorable for carrying, and the analysis to Raman spectrum is finished in inspection center in the utility model, can satisfy high-resolution requirement, simultaneously owing to the parallel detection of many probes makes native system have portability, because the Raman probe can move easily.
Description of drawings
Fig. 1 illustrates the synoptic diagram of first embodiment of Raman spectrum system of the present utility model.
Fig. 2 illustrates the synoptic diagram of second embodiment of Raman spectrum system of the present utility model.
Fig. 3 illustrates a kind of possible synoptic diagram of the optical beam-splitter in the utility model.
Fig. 4 illustrates a kind of possible synoptic diagram of the sense terminals in the utility model.
Fig. 5 illustrates a kind of possible detailed arrangement of the Raman probe that is included in the sense terminals of the present utility model.
Fig. 6 illustrates the synoptic diagram of the workflow of explaining Raman probe of the present utility model.
Embodiment
Fig. 1 illustrates the synoptic diagram of first embodiment of Raman spectrum system of the present utility model.This Raman spectrum system comprises and is used for inspection center 1 and a plurality of sense terminals that spectrum is analyzed that each sense terminals can comprise one or more Ramans probe 311...31n.In places such as airport, station, customs, building, sports ground, prison, law court, described inspection center can be placed in the room clean, the air-conditioning temperature control, described Raman probe can be arranged on a plurality of diverse locations discretely with inspection center, be used for the checking matter of diverse location is detected, perhaps the different parts to same checking matter detects.These Ramans probe each other can be at interval several meters to hundreds of rice.
In Fig. 1, inspection center 1 mainly comprises light source 11, computing machine 13, analytical equipment 14, optical fiber interface 17, beam splitter 18.Light source 11 emissions are used to excite test sample to produce the exciting light of Raman diffused light.In principle, any light source of the exciting light of line width, frequency and power stability that can provide can use in the utility model.In the present embodiment, the employing output wavelength be 785mm, output power be the laser instrument of 100mW as light source 11, its output light is through beam splitter 18 beam split.When the light intensity of light source 11 is not enough, a plurality of laser instruments can be set as light source, and/or before or after beam splitter 18, power amplifier be set.Beam splitter 18 will be from the exciting light demultiplexing light beam of light source 1, and these light beams are by optical fiber or be coupled to each Raman probe 311...31n in the sense terminals by free space as required.These Raman probes 311...31n collects the Raman diffused light that checking matter is produced respectively under the exciting light radiation, and transmits go back to inspection center 1 by optical fiber interface 17.The Raman light signal that each Raman probe 311...31n collects preferably passes through optical filter 15 filtering interfering, and sends the Raman spectrum that analytical equipment is used to obtain each checking matter to.This analytical equipment 14 for example is a spectroanalysis instrument 14 at this.Optical filter 15 will be selected according to light source 11.In the present embodiment, optical filter 15 employing centre wavelengths are the holographic notch sheet of 785nm.The Raman spectrum of each checking matter that is obtained by analytical equipment 14 sends converter 16 to and is used for the Raman light signal is converted into electric signal, and this electric signal sends computing machine 13 to handle.In the present embodiment, converter 16 for example is 1024 * 256 CCD (Charge Coupled Device).
The software module that computing machine 13 is equipped with control light source 11 and analytical equipment 14 and carries out pattern-recognition as control device, and have the storer (not shown) that is used for storage standards Raman spectrum data storehouse and the display (not shown) of display result.When computing machine 13 when analytical equipment 14 receives the Raman spectrum of checking matter, from storer, read the standard Raman spectrum, and checking matter Raman spectrum and standard Raman spectrum compared.If result relatively shows that checking matter contains specific, against regulation material in the standard Raman spectrum data storehouse, as the drugs in safety check field, explosive etc., the dangerous food in food security field, the objectionable impurities in environmental monitoring field etc., computing machine 13 produces alerting signal.No matter whether checking matter contains against regulation material, computing machine 13 is presented at testing result on the display, also can select to show simultaneously the Raman spectrum of each checking matter.No matter whether checking matter contain against regulation material, computing machine 13 all sends to separately sense terminals 3a...3n with the testing result of each checking matter respectively by communicator 12, and is shown by each sense terminals 3a...3n.Described communicator 12 can be wired, independent wiring or connect up with optical fiber; Also can be wireless.
Fig. 2 illustrates the synoptic diagram of second embodiment of Raman spectrum system of the present utility model.The feature of first embodiment of this second embodiment and the utility model Raman spectrum system is basic identical, and difference is that the light that light source 21 sends in the present embodiment has passed through repeatedly beam split.The output power of light source 21 is general more limited, and therefore the light beam that obtains through one-level beam splitter 281 is no more than 10 usually.The more Raman that is coupled is if desired popped one's head in, and then can send one or more light beams outputs of one-level beam splitter 281 to a stage power amplifier 29, after amplifying, will amplify one or more secondary beam splitters 282 that send to of light beam output afterwards.The more Raman probe if also need to be coupled, then can send one or more light beam outputs of secondary beam splitter 282 to the secondary power amplifier again, through after amplifying, send the light beam output after amplifying one or more to three grades of beam splitters .... the rest may be inferred.
Put it briefly, in the system configuration of the inferior beam split of the n (n 〉=2) of present embodiment:
-the beam splitter that is connected to light source is called the one-level beam splitter, and the beam splitter that is connected with the one-level beam splitter by power amplifier is called the secondary beam splitter, and the beam splitter that is connected with the secondary beam splitter by power amplifier is called three grades of beam splitters again, and the rest may be inferred.
-(the Raman probe on the level of the 1≤i≤n) power splitter is called i level Raman probe to be connected to i.
-(the Raman probe on the stage power amplifier of 1≤i≤n) is called i+1 level Raman probe to be connected to i.
-(power amplifier on the level of the 1≤i≤n) power splitter is called the i stage power amplifier to be connected to i.
The incident optical power that incides each Raman probe can be identical, also can be different.
By adopting one or more levels beam splitter, Raman system of the present utility model goes for the operation of multitask, and promptly a plurality of Raman probes are worked simultaneously.Workflow for the probe of Raman in this case will be described below.
Fig. 3 illustrates a kind of possible synoptic diagram of beam splitter 18 in the utility model.In the figure, beam splitter 18 will be from the light I of light source
0Be divided into 5 bundles.The ratio R of reflectivity and transmissivity: T is shown simultaneously.
Fig. 4 illustrates a kind of possible synoptic diagram of sense terminals 3 of the present utility model.Sense terminals 3 comprises one or more Raman probes 31, controller 32, communicator 33 and alarm lamp and display 34.Raman probe 31 exciting lights that receive from inspection center 1 or 2, by the pop one's head in light path of 31 inside of Raman this exciting light is radiated on the checking matter, collection is by the light of checking matter scattering, and sends collected scattered light to inspection center 1 or 2 as described in Fig. 1,2.Detailed arrangement about Raman probe 31 is discussed below.When Raman probe 31 is one, can scan detection by detecting multiple spot to checking matter.When Raman probe 31 when be a plurality of, a plurality of Ramans probes 31 can be simultaneously detect the diverse location of same checking matter, also can scan detection to this checking matter, and promptly each Raman is popped one's head in and all detected multiple spot.A plurality of Raman probes also can detect different checking matters.Controller 32 control Raman probes 31, and control alarm lamp and display 34.The operator can assign the order of detection to controller 32 by the test button on the guidance panel (not shown) of sense terminals 3, also can close Raman probe 31 by controller 32.On the other hand, controller 32 also receives inspection centers 1 or 2 by the instruction of communicators issue of self and the testing result of transmission by communicator 33, and this testing result is presented on alarm lamp and the display 34, described testing result is the testing result of each Raman probe 31 of sense terminals 3.Communicator 33 can be implemented according to identical mode with the communicator in Fig. 1,2 the inspection center 1 or 2.
Fig. 5 illustrates a kind of possible detailed arrangement of the Raman probe 31 that is included in the sense terminals of the present utility model.Raman probe 31 comprises the importing light path of exciting light and the collection light path of scattered light.On the importing light path of exciting light,, successively focus on the checking matter through lens L1, narrow band filter slice NF, two catoptron R1 and R2, lens L3 by importing optical fiber IF from inspection center 1 or 2 exciting lights that receive.Described narrow band filter slice NF is used for filtering interfering, has good monochromaticity to guarantee the exciting light that shines on the checking matter.If the Raman probe 31 excitating light strength deficiencies that receive can be provided with power amplifier between importing optical fiber IF and lens L1.Checking matter produces Raman diffused light under the effect of this exciting light, this Raman diffused light enters collection optical fiber OF through lens L3 and lens L2 on the collection light path of scattered light, and finally sends inspection center 1 or 2 to.This collection light path can also comprise optical elements such as holographic notch sheet, long wave pass filter, dichroic mirror, is used for the interference of filtering Rayleigh line.
The utility model goes for the operation of multitask.In this case, a plurality of Raman probes can be worked simultaneously.
Fig. 6 illustrates the synoptic diagram of the workflow of explaining Raman probe of the present utility model.This workflow judges from step S1 whether the Raman probe receives detection instruction beginning.If do not receive, then wait instruction to be detected.Detect instruction if receive, then in step S2, the Raman probe judges that automatically it imports light and whether has connected power amplifier.If connected power amplifier, then the Raman probe further judges whether power amplifier starts in step S3.If power amplifier does not start, then in step S4, start this power amplifier.Whether the importing optical fiber no matter Raman is popped one's head in connects power amplifier, and the Raman probe can check in step S5 all whether the light source of inspection center is opened.If this light source is not opened as yet, then in step S6, start this light source automatically.Receive after the exciting light from light source, the Raman probe detects checking matter in step S7, the irradiation checking matter, and collect Raman diffused light, as shown in Figure 5.
Generally speaking, the utility model provides a kind of Raman spectrum system, and this Raman spectrum system comprises the Raman spectrum that is used to obtain checking matter and according to the inspection center of this Raman spectrum identification checking matter, and one or more sense terminals.This sense terminals can comprise one or more Raman probes respectively, and each Raman probe guides to checking matter with exciting light, and the Raman diffused light that checking matter is produced sends inspection center to obtain the Raman spectrum of this checking matter.By Raman spectrum system of the present utility model, can realize parallel, the high-resolution raman spectroscopy measurement of many probes.Because the Raman probe can move easily, so this system has certain portability.
Claims (10)
1. Raman spectrum system comprises:
Inspection center comprises
At least one light source is used to export the exciting light that excites checking matter to produce Raman diffused light;
Analytical equipment is used to obtain the Raman spectrum of checking matter;
At least one sense terminals, each sense terminals comprise at least one Raman probe, and described each Raman probe guides to checking matter with exciting light, and the Raman diffused light that checking matter is produced sends back inspection center.
2. Raman spectrum system according to claim 1 is characterized in that described inspection center also comprises beam splitter, is used for the exciting light of light source output is divided into multi beam.
3. Raman spectrum system according to claim 2 is characterized in that described beam splitter comprises one or more levels beam splitter, when beam splitter when being multistage, between the two-stage beam splitter power amplifier is set, and is used to amplify exciting light.
4. according to each described Raman spectrum system in the claim 1 to 3, it is characterized in that, described inspection center also comprises control device, is used to control the operation of described at least one light source and analytical equipment, and the Raman spectrum that analytical equipment obtains is handled.
5. Raman spectrum system according to claim 4, it is characterized in that, described control device has the storer that is used for storage standards Raman spectrum data storehouse, when described control device is handled the Raman spectrum that analytical equipment obtained, this Raman spectrum and the standard Raman spectrum that reads from storer are compared, to determine whether this checking matter contains against regulation material.
6. Raman spectrum system according to claim 4 is characterized in that, described inspection center also comprises:
Converter, the Raman spectrum that is used to change after described Raman spectrum also will be changed sends control device to;
Communicator is used for transmitting data between inspection center and sense terminals.
7. Raman spectrum system according to claim 5 is characterized in that, described control device sends the result of described comparison to separately sense terminals respectively by described communicator.
8. Raman spectrum system according to claim 6 is characterized in that, described sense terminals also comprises:
Controller is used for receiving and detects instruction, controls described at least one Raman probe;
Communicator is used for transmitting data between sense terminals and inspection center.
9. according to claim 6 or 8 described Raman spectrum systems, it is characterized in that described communicator is wire communication device or radio communication device.
10. according to each described Raman spectrum system in the claim 1 to 3, it is characterized in that, described inspection center also comprises coupling device, be used for to be coupled to from the exciting light of light source described at least one Raman probe, and will send analytical equipment to from the Raman diffused light of described at least one Raman probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201088999U CN201222037Y (en) | 2008-06-27 | 2008-06-27 | Raman spectrum system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201088999U CN201222037Y (en) | 2008-06-27 | 2008-06-27 | Raman spectrum system |
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| CN201222037Y true CN201222037Y (en) | 2009-04-15 |
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| CNU2008201088999U Expired - Lifetime CN201222037Y (en) | 2008-06-27 | 2008-06-27 | Raman spectrum system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507532A (en) * | 2011-11-11 | 2012-06-20 | 上海化工研究院 | Chemical composition instant recognition system based on Raman spectrum |
| CN102519937A (en) * | 2011-12-30 | 2012-06-27 | 华东交通大学 | Handheld Raman probe |
| CN102706854A (en) * | 2012-06-11 | 2012-10-03 | 上海化工研究院 | Portable system for rapidly recognizing chemical fertilizer |
| CN104865279A (en) * | 2014-02-26 | 2015-08-26 | 清华大学 | Customs supervision item rapid-inspection equipment and method |
| CN105842223A (en) * | 2011-07-13 | 2016-08-10 | 赛默科技便携式分析仪器有限公司 | Heroin detection by raman spectroscopy from impure compositions comprising an interfering fluorescent contaminant |
-
2008
- 2008-06-27 CN CNU2008201088999U patent/CN201222037Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842223A (en) * | 2011-07-13 | 2016-08-10 | 赛默科技便携式分析仪器有限公司 | Heroin detection by raman spectroscopy from impure compositions comprising an interfering fluorescent contaminant |
| US10001443B2 (en) | 2011-07-13 | 2018-06-19 | Thermo Scientific Portable Analytical Instruments Inc. | Heroin detection by Raman spectroscopy from impure compositions comprising an interfering fluorescent contaminant |
| CN105842223B (en) * | 2011-07-13 | 2020-07-17 | 赛默科技便携式分析仪器有限公司 | Detection of heroin from impure compositions containing interfering fluorescent contaminants by raman spectroscopy |
| CN102507532A (en) * | 2011-11-11 | 2012-06-20 | 上海化工研究院 | Chemical composition instant recognition system based on Raman spectrum |
| CN102519937A (en) * | 2011-12-30 | 2012-06-27 | 华东交通大学 | Handheld Raman probe |
| CN102706854A (en) * | 2012-06-11 | 2012-10-03 | 上海化工研究院 | Portable system for rapidly recognizing chemical fertilizer |
| CN104865279A (en) * | 2014-02-26 | 2015-08-26 | 清华大学 | Customs supervision item rapid-inspection equipment and method |
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Granted publication date: 20090415 |
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| CX01 | Expiry of patent term |