CN108088833A - Use the Handheld Raman detector of single-mode laser - Google Patents
Use the Handheld Raman detector of single-mode laser Download PDFInfo
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- CN108088833A CN108088833A CN201611032180.7A CN201611032180A CN108088833A CN 108088833 A CN108088833 A CN 108088833A CN 201611032180 A CN201611032180 A CN 201611032180A CN 108088833 A CN108088833 A CN 108088833A
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- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 60
- 238000004458 analytical method Methods 0.000 claims abstract description 30
- 238000001237 Raman spectrum Methods 0.000 claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims 3
- 230000003595 spectral effect Effects 0.000 abstract description 16
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000005286 illumination Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010183 spectrum analysis Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 235000021393 food security Nutrition 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012360 testing method 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)
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- 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)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a kind of Handheld Raman detectors using single-mode laser, belong to laser detection field.The Handheld Raman detector using single-mode laser includes single-mode laser, Raman spectrum analysis light path, ccd detector and optic path part, the mechanic adjustment unit that the laser facula for being radiated at sample surface is made to be scanned according to predetermined pattern being provided on the single-mode laser or optic path part.The present invention can be that can obtain the raman spectral signal of sample entirety by single measurement, substantially reduce the volume and power consumption of Handheld Raman detector, enhance the performance of the portable use of Handheld Raman detector.
Description
Technical field
The present invention relates to laser detection fields, particularly relate to a kind of Handheld Raman detector using single-mode laser.
Background technology
Raman spectrum detection technique is to obtain the spectral information of material molecule level using laser, by database to score
The ingredient of test substance and the technology of content are analysed, there is powerful ability in lossless Physical Property Analysis and on differentiating.Due to Raman light
Detection technique is composed without sample preparation, hardly consumes sample, while detection speed is fast, and detection knot can be often obtained in several seconds
Fruit, therefore Raman spectrum detection technique has been widely used in food security, drug inspection, drugs detecting, judicial expertise, jewelry
The fields such as identification and environment measuring.In recent years, with the development of semiconductor laser technique and ccd detector technology, traditional body
The huge Raman spectrometer of product can accomplish hand-held.The Raman detector compact of this hand-held, it is easy-to-use,
It can fast and accurately be detected at detection scene, greatly promote the application of Raman detection.
Current Handheld Raman detector usually by semiconductor laser, Raman spectrum analysis light path, ccd detector,
A few part compositions such as data handling system, user interface, and rechargeable battery is equipped with as power supply.Due to integrated equipment
More, the power consumption for causing equipment entirety is bigger than normal, and the volume of equipment is also difficult to miniaturise.
The laser used in Raman detector is divided into two kinds of single-mode laser and multimode laser.Single-mode laser volume
Small, low in energy consumption, the size of laser facula is usually less than 10 microns；Multimode laser volume is larger, and power consumption is high, the ruler of laser facula
It is very little usually in 200 microns.Since the detection sample of Handheld Raman detector is mostly mix powder, single-mode laser
The smaller laser facula of size can only be often irradiated on the particle of a certain ingredient in the sample, and single measurement is difficult to be mixed
The raman spectral signal of object entirety, and the larger-size laser facula of multimode laser can be irradiated to Multiple components in sample
Particle on, single measurement is that can obtain the Raman signal of mixture entirety, therefore current Handheld Raman detector is most
Using multimode laser.However the volume of multimode laser and power consumption are unfavorable for the further small-sized of Handheld Raman detector
Change, affect the portability of Handheld Raman detector.
The content of the invention
The technical problem to be solved in the present invention is to provide one kind can obtain sample entirety by single measurement
Raman spectral signal the Handheld Raman detector using single-mode laser.
In order to solve the above technical problems, present invention offer technical solution is as follows：
A kind of Handheld Raman detector using single-mode laser, including single-mode laser, Raman spectrum analysis light path,
Be provided with to make on ccd detector and optic path part, the single-mode laser or optic path part to be radiated at by
The mechanic adjustment unit that the laser facula on sample surface is scanned according to predetermined pattern.
Further, the optic path part include being arranged on the single-mode laser and Raman spectrum analysis light path it
Between dichroscope, the light path exit direction of the dichroscope is disposed with speculum and lens.
Further, the mechanic adjustment unit includes motor, and the output terminal of the motor connects the speculum, is used for
The minute surface of the speculum is adjusted compared with the angle of the lens.
Further, the angle of regulation range of the minute surface of the speculum is 0 °~15 °.
Further, the mechanic adjustment unit includes motor, and the output terminal of the motor connects the single-mode laser,
The motor is used to that the single-mode laser to be controlled to move horizontally compared with the Raman spectrum analysis light path.
Further, the mechanic adjustment unit includes motor, and the output terminal of the motor connects the dichroscope, institute
Motor is stated for the dichroscope to be controlled to be moved horizontally compared with the Raman spectrum analysis light path.
Further, the dichroscope or single-mode laser are moved horizontally compared with the Raman spectrum analysis light path
Distance be 0.1~0.5mm.
Further, the angle between the dichroscope and single-mode laser is 15 °~55 °.
Further, the minute surface of the speculum is 30 °~60 ° compared with the angle of lens.
Further, the size of the single-mode laser hot spot of the single-mode laser output is less than 10um.
The invention has the advantages that：
Compared with prior art, when detecting, single mode swashs the Handheld Raman detector of the invention using single-mode laser
The single-mode laser that light device is sent by optic path partial illumination to sample surface when, mechanic adjustment unit is quickly adjusted
Single-mode laser or optic path part so that be radiated at the laser facula on sample surface on sample surface
Quick scanning in a predetermined pattern, so as to inspire the raman spectral signal of sample surface different position, detected sample afterwards
These raman spectral signals of product again pass by optic path part and reach Raman spectrum analysis light path, Raman spectrum analysis light path
After the raman spectral signal of sample is carried out Dispersion Analysis, ccd detector is transferred to, ccd detector is by the drawing after analysis
Graceful spectral signal is converted to electric signal and is transferred to data handling system, and data handling system analyzes and processes electric signal,
So as to obtain the information of the ingredient of contained substance and content in sample.The Handheld Raman using single-mode laser of the present invention
The raman spectral signal of sample entirety can be effectively detected during detector single measurement, substantially reduce Handheld Raman
The volume and power consumption of detector enhance the performance of the portable use of Handheld Raman detector.
Description of the drawings
Fig. 1 is the structure diagram of the Handheld Raman detector using single-mode laser of the present invention, wherein mechanical adjustment
Device is connected with speculum；
Fig. 2 is the structure diagram of the Handheld Raman detector using single-mode laser of the present invention, wherein mechanical adjustment
Device is connected with single-mode laser；
Fig. 3 is the structure diagram of the Handheld Raman detector using single-mode laser of the present invention, wherein mechanical adjustment
Device is connected with dichroscope；
Fig. 4 (a), Fig. 4 (b) are the laser facula of the Handheld Raman detector using single-mode laser of the present invention tested
Two kinds of schematic diagrames of predetermined pattern when being scanned on sample surfaces.
Specific embodiment
To make the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of Handheld Raman detector using single-mode laser, as shown in Figure 1 to Figure 3, including single mode
Laser 1, Raman spectrum analysis light path 7, ccd detector 8 and optic path part, single-mode laser 1 or optic path portion
The mechanical adjustment that the laser facula for being radiated at 6 surface of sample is made to be scanned according to predetermined pattern is provided on point
Device 4.
When detecting, the single mode that single-mode laser is sent swashs the Handheld Raman detector using single-mode laser of the present invention
Light by optic path partial illumination to sample surface when, mechanic adjustment unit quickly adjusts single-mode laser or light
Road hop so that be radiated at the laser facula on sample surface quick in a predetermined pattern on sample surface
Scanning, so as to inspire the raman spectral signal of sample surface different position, these Raman spectrums of sample afterwards
Signal again passes by optic path part and reaches Raman spectrum analysis light path, and Raman spectrum analysis light path is by the Raman of sample
After spectral signal carries out Dispersion Analysis, ccd detector is transferred to, ccd detector is converted to the raman spectral signal after analysis
Electric signal is simultaneously transferred to data handling system, and data handling system analyzes and processes electric signal, so as to obtain sample
The ingredient of middle contained substance and the information of content.The present invention using single-mode laser Handheld Raman detector single measurement when
The raman spectral signal of sample entirety can be effectively detected, substantially reduce the volume and work(of Handheld Raman detector
Consumption enhances the performance of the portable use of Handheld Raman detector.
Further, optic path part preferably includes to be arranged between single-mode laser 1 and Raman spectrum analysis light path
Dichroscope 2, the light path exit direction of dichroscope 2 is disposed with speculum 3 and lens 5.What single-mode laser 1 projected
Single-mode laser by the reflected illumination of dichroscope 2 to speculum 3, using the reflected illumination of speculum 3 to lens 5, lens 5
Single-mode laser is focused to the surface of sample 6, excites the raman spectral signal of sample 6.Lens 5 collect sample
6 raman spectral signal reaches Raman spectrum analysis light path 7, Raman light by the reflection of speculum 3, then through dichroscope 4
Spectrum analysis light path 7 will be transferred to ccd detector 8 after raman spectral signal carries out Dispersion Analysis, and ccd detector 8 is by Raman spectrum
Signal is converted to electric signal and is transferred to the data handling system of the Handheld Raman monitor using single-mode laser of the present invention,
Data handling system analyzes and processes electric signal, so as to obtain the ingredient of contained substance and the letter of content in sample
Breath.
In one embodiment of the present invention, mechanic adjustment unit 4 includes motor, and the output terminal of motor connects speculum 3,
For adjusting the minute surface of speculum 3 compared with the angle of lens 5.When single-mode laser is irradiated on speculum 3, the fast velocity modulation of motor
The minute surface of speculum 3 is saved compared with the angle of lens 5 so that single-mode laser is irradiated at different angles on lens 5, Jin Ergai
Become the position for the laser facula for being radiated at 6 surface of sample, realize laser facula according to predetermined pattern in 6 table of sample
It quickly scans in face.
In the present embodiment, the different driving pattern of motor according to the property of different samples, can be set, and will reflection
The angle of regulation range of the minute surface of mirror 3 is controlled within 0 °~15 ° so that the hot spot of single-mode laser is pressed on 6 surface of sample
It is scanned according to different predetermined patterns.
Fig. 4 (a), (b) give the schematic diagram of the predetermined pattern of two kinds of laser faculas.In addition, predetermined pattern except
Outside two kinds of forms shown in Fig. 4, the lines or plane form of other shapes are can also be.
In second embodiment of the present invention, mechanic adjustment unit 4 includes motor, the output terminal connection single-mode laser of motor
Device 1, motor are used to that single-mode laser 1 to be controlled to move horizontally compared with Raman spectrum analysis light path 7.When single-mode laser is irradiated to two
When in Look mirror 2, motor controls single-mode laser 1 compared with 7 movement in the horizontal direction of Raman spectrum analysis light path so that single
Mould laser can be radiated on the different position of dichroscope 2, and the reflected illumination for passing through speculum 3 does not have to position to lens 5
It puts, and then changes the position for the laser facula for being radiated at 6 surface of sample, realize that laser facula exists according to predetermined pattern
It quickly scans on 6 surface of sample.
In the present embodiment, according to the property of different samples motor can be set to control single-mode laser 1 compared with drawing
The distance that graceful spectrum analysis light path 7 moves horizontally is in the range of 0.1~0.5mm so that the hot spot of single-mode laser is in sample 6
Surface is scanned according to different predetermined patterns.
In the 3rd embodiment of the present invention, mechanic adjustment unit 4 includes motor, the output terminal connection dichroscope of motor
2, motor is used to that dichroscope 2 to be controlled to move horizontally compared with Raman spectrum analysis light path.When single-mode laser is irradiated to dichroic
When on mirror 2, motor is controlled to Look mirror 2 compared with 7 movement in the horizontal direction of Raman spectrum analysis light path so that single-mode laser can
To be radiated on the different position of dichroscope 2, and the reflected illumination for passing through speculum 3 does not have to lens 5 on position, and then
Change the position for the laser facula for being radiated at 6 surface of sample, realize laser facula according to predetermined pattern in sample 6
It quickly scans on surface.
In the present embodiment, according to the property of different samples motor can be set to control dichroscope 2 compared with Raman
The distance that spectrum analysis light path 7 moves horizontally is in the range of 0.1~0.5mm so that the hot spot of single-mode laser is in 6 table of sample
Face is scanned according to different predetermined patterns.
In above three embodiment, the angle between dichroscope 2 and single-mode laser 1 is preferably 15 °~55 °, reflection
The minute surface of mirror 3 is preferably 30 °~60 ° compared with the angle of lens 5, with ensure dichroscope 2 or single-mode laser 1 compared with
Laser facula when Raman spectrum analysis light path 7 moves horizontally or the angle of the minute surface relative lens 5 of speculum 3 changes
It can be radiated on the surface of sample 6.
Further, since the small size of single-mode laser and the function of low-power consumption, the single-mode laser light that single-mode laser 1 exports
The size of spot should be preferably smaller than 10um.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of Handheld Raman detector using single-mode laser, including single-mode laser, Raman spectrum analysis light path, CCD
Detector and optic path part, which is characterized in that be provided with to make on the single-mode laser or optic path part
It is radiated at the mechanic adjustment unit that the laser facula on sample surface is scanned according to predetermined pattern.
2. the Handheld Raman detector according to claim 1 using single-mode laser, which is characterized in that the light path passes
Defeated part includes the dichroscope being arranged between the single-mode laser and Raman spectrum analysis light path, the dichroscope
Light path exit direction is disposed with speculum and lens.
3. the Handheld Raman detector according to claim 2 using single-mode laser, which is characterized in that the machinery is adjusted
Regulating device includes motor, and the output terminal of the motor connects the speculum, for adjust the minute surface of the speculum compared with
The angle of the lens.
4. the Handheld Raman detector according to claim 3 using single-mode laser, which is characterized in that the speculum
Minute surface angle of regulation range be 0 °~15 °.
5. the Handheld Raman detector according to claim 2 using single-mode laser, which is characterized in that the machinery is adjusted
Regulating device includes motor, and the output terminal of the motor connects the single-mode laser, and the motor is used to that the single mode to be controlled to swash
Light device is moved horizontally compared with the Raman spectrum analysis light path.
6. the Handheld Raman detector according to claim 2 using single-mode laser, which is characterized in that the machinery is adjusted
Regulating device includes motor, and the output terminal of the motor connects the dichroscope, and the motor is used to control the dichroscope
It is moved horizontally compared with the Raman spectrum analysis light path.
7. the Handheld Raman detector according to claim 5 or 6 using single-mode laser, which is characterized in that described two
The distance moved horizontally to Look mirror or single-mode laser compared with the Raman spectrum analysis light path is 0.1~0.5mm.
8. according to any Handheld Raman detector using single-mode laser in claim 2-6, which is characterized in that institute
It is 15 °~55 ° to state the angle between dichroscope and single-mode laser.
9. the Handheld Raman detector according to claim 8 using single-mode laser, which is characterized in that the speculum
Minute surface compared with lens angle be 30 °~60 °.
10. the Handheld Raman detector according to claim 8 using single-mode laser, which is characterized in that the single mode
The size of the single-mode laser hot spot of laser output is less than 10um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032180.7A CN108088833A (en) | 2016-11-22 | 2016-11-22 | Use the Handheld Raman detector of single-mode laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032180.7A CN108088833A (en) | 2016-11-22 | 2016-11-22 | Use the Handheld Raman detector of single-mode laser |
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| CN201611032180.7A Pending CN108088833A (en) | 2016-11-22 | 2016-11-22 | Use the Handheld Raman detector of single-mode laser |
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