CN207779899U - Raman spectrum detection device - Google Patents
Raman spectrum detection device Download PDFInfo
- Publication number
- CN207779899U CN207779899U CN201721858790.2U CN201721858790U CN207779899U CN 207779899 U CN207779899 U CN 207779899U CN 201721858790 U CN201721858790 U CN 201721858790U CN 207779899 U CN207779899 U CN 207779899U
- Authority
- CN
- China
- Prior art keywords
- sample
- raman spectrum
- optical element
- detection device
- light path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
The utility model provides Raman spectrum detection device, including：Laser, for emitting exciting light；Optical module, for guiding the exciting light to sample along the first light path and collecting the optical signal from the sample along the second light path；And spectrometer, for being divided the optical signal collected by optical module to generate the Raman spectrum of detected sample, the optical module includes the first optical element, which is configured to position of the movement to change hot spot of the exciting light on sample during exciting light irradiating sample.
Description
Technical field
The embodiments of the present invention are usually related to Raman spectrum detection field more particularly to Raman spectrum detection device
With the method for detection sample.
Background technology
Raman spectrum analysis technology is a kind of contactless spectral analysis technique based on Raman scattering effect, its energy
Qualitative and quantitative analysis is carried out to the ingredient of substance.Raman spectrum is a kind of molecular vibration spectrum, it can reflect the fingerprint of molecule
Feature can be used for the detection to substance.Raman spectrum detection is by detecting Raman scattering effect institute of the determinand for exciting light
The Raman spectrum of generation detects and identifies substance.Raman spectra detection process has been widely used for liquid safety check, jewelry inspection
The fields such as survey, explosive detection, illicit drugs inspection, drug detection.
In the application field of Raman spectrum analysis technology, since checking matter is multifarious, the physical characteristic meeting of various substances
Different, they have difference for the heat sensitivity of the laser irradiation for Raman spectrum analysis technology.Due to Raman spectrum
Need to use the laser of high power density to have stronger fuel factor as excitation light source, such as the 785nm laser of near-infrared, in sample
In the case of unknown, detection rashly is likely to result in sample and is damaged by laser ablation, it could even be possible to cause laser-induced combustion or
Some inflammable and explosive chemicals are ignited, the loss of personal property is caused.
Invention content
In order to overcome the problems, such as at least one of of the existing technology above and other and defect, it is proposed that this practicality is new
Type.
One side according to the present utility model, it is proposed that a kind of Raman spectrum detection device, including：
Laser, for emitting exciting light；
Optical module, for guiding the exciting light to sample along the first light path and being collected from described along the second light path
The optical signal of sample；With
Spectrometer, for being divided the optical signal collected by optical module to generate the Raman light of detected sample
Spectrum,
The optical module includes the first optical element, which was configured in the exciting light irradiating sample phase
Between movement to change the position of hot spot of the exciting light on sample.
In one embodiment, the first optical element is further configured to rotate around an axis, to guide exciting light
The hot spot being radiated on sample is moved with general toroidal track on sample.
In one embodiment, the first optical element is further configured to move along the axis, described in change
The radius of general toroidal track of the hot spot on sample.
In one embodiment, the first optical element is further configured to the while of being moved along the axis and surrounds
The axis rotation, to guide the hot spot to be moved on sample with substantially spiral trajectory.
In one embodiment, Raman spectrum detection device further includes driving mechanism, which is configured to drive
First optical element is rotated around the axis and/or is moved along the axis.
In one embodiment, the axis passes through the center of the first optical element.
In some embodiments, a part for the first light path is coaxial with the second light path, and first optical element exists
It is located between laser and sample in second light path, and the axis is parallel to second light path；Alternatively, the first light
Road and the second light path are off-axis, and first optical element is located in the first light path, and the axis be parallel to it is described
First light path is from laser to the part of the first optical element.
In one embodiment, the first optical element includes wedge.
Another aspect according to the present utility model provides a kind of side for detecting sample using Raman spectrum detection device
Method includes the following steps：
Emitted exciting light by laser and is guided the exciting light to sample by optical module；
Change the position that exciting light is radiated at the hot spot on sample by the movement of the first optical element；And
The optical signal generated under exciting light irradiation by spectrometer collection sample is to form the Raman spectrum of sample.
In one embodiment, the position that exciting light is radiated at the hot spot on sample is changed by the movement of the first optical element
The step of setting is continued for during exciting light irradiating sample, or with a timing during exciting light irradiating sample
Between be spaced and intermittently carry out.
In one embodiment, the position that exciting light is radiated at the hot spot on sample is changed by the movement of the first optical element
The step of setting include：The first optical element is rotated to guide exciting light to be radiated at the hot spot on sample with general toroidal track in sample
It is moved on product.
In one embodiment, this method further includes moving along the axis while the first optical element rotates
One optical element, to change the radius of general toroidal track of the hot spot on sample.
In one embodiment, the first optical element guides the hot spot with substantially spiral shell while exciting light irradiating sample
It is moved on sample rotation shape track.
By below with reference to attached drawing to being described in detail made by the utility model, other purposes of the utility model and excellent
Point will be evident, and can help to be fully understood by the utility model.
Description of the drawings
Can be more clearly understood the feature and advantage of the utility model by reference to attached drawing, attached drawing be it is schematical and
It should not be construed as carrying out any restrictions to the utility model, in the accompanying drawings：
Fig. 1 is showing for the arrangement for the Raman spectrum detection device for showing an exemplary embodiment according to the present utility model
It is intended to；
Fig. 2 is the arrangement for the Raman spectrum detection device for showing another exemplary embodiment according to the present utility model
Schematic diagram；
Fig. 3 is to show that the Raman spectrum detection device of an exemplary embodiment according to the present utility model is generated in sample
Hot spot movement locus schematic diagram；
Fig. 4 is to show that the Raman spectrum detection device of another exemplary embodiment according to the present utility model is produced in sample
The schematic diagram of the movement locus of raw hot spot；
Fig. 5 is to show that the Raman spectrum detection device of another exemplary embodiment according to the present utility model is produced in sample
The schematic diagram of the movement locus of raw hot spot；And
Fig. 6 be show an exemplary embodiment according to the present utility model by Raman spectrum detection device detect sample
Method flow chart.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clear, complete description, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
In addition, in the following detailed description, for ease of explaining, elaborating many concrete details to provide to the disclosure
The comprehensive understanding of the embodiment of content.It should be apparent, however, that one or more embodiments are without these specific details
It can also be carried out.In other cases, well known construction and device is diagrammatically embodied to simplify attached drawing.
Fig. 1 schematically shows the Raman spectrum detection device of an exemplary embodiment according to the present utility model
Arrangement.As shown, Raman spectrum detection device 100 includes：Laser 10, for emitting exciting light 11；Optical module 20 is used
In the optical signal from sample 1 by the guiding of exciting light 11 to sample 1 and collection；Spectrometer 30, for being received by optical module 20
The optical signal of collection is divided to generate the Raman spectrum generated under the irradiation of 1 exciting light of sample.As an example, by spectrometer
The Raman spectrum of the sample of generation can be compared to determine the ingredient of sample with the Raman spectrum of known substance.This comparison
It can for example be completed by computer or processor.
During Raman detection, safety problem often caused by during laser irradiation sample sample heat absorption lead to temperature
Rise, and then be likely to result in the ablation to measured object, or even generates phenomena such as igniting, igniting.In the implementation of the utility model
In example, the position of hot spot of the exciting light on sample is guided and changed using optical element so that exciting light is not quiet with single-point
State mode irradiating sample, but can change the irradiation position in sample, prevents from excessively heating some position of sample, can be with
It avoids in Raman spectrum detection process, due to the degradation of sample caused by too strong laser power density, burns, ignites
It even explodes, reduces the risk of detection process.
In one embodiment, as illustrated in fig. 1 and 2, optical module includes the first optical element 22, is configured to or energy
Enough movements during 11 irradiating sample of exciting light 1 are to change the position of hot spot of the exciting light on sample, arrow as dashed lines
It is indicated, so as to avoid heat from building up or accumulate at some position of sample.It is appreciated that for changing on sample
The concrete form of first optical element of the position of hot spot is varied, may include prism in some examples, such as wedge.
In one example, as illustrated in fig. 1 and 2, the first optical element 22 can surround an axes O-O ' rotations, with guiding
Exciting light 11 is radiated at the hot spot on sample in a manner of non-pooled, such as with general toroidal track, is moved on sample (clockwise
Or counterclockwise), as shown in figure 3, the laser energy in dispersed sample, avoid sample overheat caused by conventional single point static illumination or
Damage problem.Moreover, position of the hot spot of exciting light on sample is changed around the rotation of axis by the first optical element,
So that light path system is stablized relatively, avoid the movement of other optical elements that light path is caused to fluctuate.
It is appreciated that the movement locus of hot spot of the exciting light on sample is not limited to annular trace, can also take other
Straight line or curvilinear path avoid accumulation or accumulation of the heat at some position of sample.In the embodiments of the present invention
In, the hot spot of exciting light is moved or is scanned on sample with general toroidal track, and can be effectively prevented to be repeatedly scanned with leads to heat
Measure the accumulation on sample.
In another example, the first optical element 22 can also be moved axially or be translated, such as mobile along axes O-O '
(unidirectional, two-way or reciprocating movement back and forth), as shown in the four-headed arrow in Fig. 1 and 2 so that the first optical element 22 is in the axis
Position change, to change the radius of general toroidal track of the hot spot of exciting light 11 on sample 1, such as the annular of Fig. 4
Indicated by track 101,102.Illustratively, in the embodiment of Fig. 1 and 2 diagrams, when the first optical element 22 is along axes O-
When O ' is moved towards sample 1, the radius of the track of the hot spot on sample 1 becomes smaller, and when the first optical element 22 is along axes O-
When O ' is moved far from sample 1, the radius of the track of the hot spot on sample 1 becomes larger.
In an exemplary embodiment of the utility model, the first optical element 22 is configured to along axes O-O '
It is rotated around the axis while mobile or translation, to guide the hot spot of exciting light to be moved on sample with substantially spiral trajectory
Scanning, as shown in figure 5, it is possible thereby to more efficiently dispersion laser energy, reduces accumulation of the heat on sample.
As illustrated in fig. 1 and 2, Raman spectrum detection device further includes that can drive the first optics with driving mechanism 40
Element 22 is mobile along axes O-O ' around axes O-O ' rotations, and/or the first optical element 22 of driving.Driving mechanism it is specific
Form is not particularly limited herein, and an example includes motor.
In one example, axes O-O ' extends through the center of the first optical element 22 so that the first optical element phase
Rotation or translation for the axis can more be stablized, and hot spot is more uniform in the distribution of the track of sample.In the implementation of diagram
In example, optical module 20 guides exciting light 11 to sample 1, and along the second light path along the first light path (heavy line indicates in such as figure)
21 guide the optical signal from sample 1 to spectrometer 30.In Fig. 1, a part for the first light path and the second light path 21 are same
Axis, the first optical element 22 positions between laser 10 and sample 11 (specifically, between spectroscope 25 and sample 11)
It in the second light path 21 or is located in the first light path part coaxial with the second light path 21, and axes O-O ' is parallel to second
Light path 21.In this case, axes O-O ' can extend through the center of the first optical element 22 and sample 1.And Fig. 2's
In alternative embodiment, the first light path and the second light path 21 are off-axis or independent of each other and extend to sample 1 from laser 10,
First optical element 22 is located in the first light path, and to be parallel to the first light path first from laser to the first optics by axes O-O '
The part of part, for example, axes O-O ' extends through the center of the first optical element 22 and sample 1.
In some embodiments, as illustrated in fig. 1 and 2, light path 21 can be established or be formed to optical module 20, come for collecting
From the optical signal (including Raman light ingredient) of sample 1 or direct this signal to spectrometer.The exemplary implementation illustrated in Fig. 1
In example, the convergent lens 23 close to spectrometer 30, the convergent lens 24 of close sample 1 are provided in light path 21, positioned at convergence
Spectroscope 25 and long pass filter piece between lens 23 and 24 or notch filter piece 26, the first optical element 22 is in spectroscope
(for example, between spectroscope 25 and convergent lens 24) is located in light path 21 between 25 and sample 1.Convergent lens 24 will be for that will swash
Luminous 11 converge to sample 1 and collect the optical signal from sample 1.Spectroscope 25 is used to come from the exciting light of laser 10
11 to the first optical element 22 and the guiding of convergent lens 24 (as reflected), and makes at least part of the optical signal from sample 1
Second spectroscope is transmitted through with directive spectrometer 30.Long pass filter piece or notch filter piece 26 are for filtering out by spectroscope
The Reyleith scanttering light in optical signal after 25.Convergent lens 23 (is such as converged to for the light from sample to be converged to spectrometer 30
On its detector).In addition, in the exciting light light path from laser 10 to sample, other optical elements 27 can also be set, such as
Collimation lens and/or narrow band filter slice, collimation lens can make exciting light be known as being similar to directional light to improve directionality and light
Efficiency is learned, narrow band filter slice can remove interference, improve signal-to-noise ratio of the exciting light in desired wavelength period.
The embodiments of the present invention additionally provide a kind of Raman spectrum using described in the embodiments of the present invention
The method that detection device detects sample.Referring to Fig. 1-6, this method may include following step：
S1：Emitted exciting light 11 by laser 10 and is guided the exciting light to sample 1 by optical module；
S2：Change the position that exciting light is radiated at the hot spot on sample 1 by the movement of the first optical element 22；And
S3：The optical signal generated under exciting light irradiation by the collection sample 1 of spectrometer 30 is to form the Raman spectrum of sample.
In some instances, it is radiated on sample as previously mentioned, changing exciting light by the movement of the first optical element
The step of position of hot spot, can be continued for during exciting light irradiating sample, can also be during exciting light irradiating sample
It intermittently carries out, or is selectively carried out according to safe condition of the sample in the case where being irradiated with a laser at a time interval.
In one example, in step sl, the first optical element 22 can be driven around axes O-O ' rotations to guide
Exciting light 11 is radiated at the hot spot on sample and is moved on sample 1 with general toroidal track.In other examples, can be driven
One optical element 22 is moved or is translated along the axis while being rotated around axes O-O ', and the hot spot to change exciting light exists
The radius of general toroidal track on sample, such as so that hot spot is moved with substantially spiral trajectory on sample.
In the embodiments of the present invention, the position of hot spot of the exciting light on sample is guided and changed using optical element
It sets so that exciting light can change its irradiation position in sample not instead of with single-point static mode irradiating sample, prevent pair
Some position of sample is excessively heated, can be to avoid in Raman spectrum detection process, since too strong laser power density is led
The degradation of the sample of cause burns, ignites and even explode, and reduces the risk of detection process, it is ensured that Raman spectrometer used
The safety of secure sample and user in journey.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can be changed to these embodiments in the case where not departing from the principles of the present invention and spirit, this practicality
Novel range is defined by the appended claims and the equivalents thereof.
Claims (8)
1. a kind of Raman spectrum detection device, which is characterized in that the Raman spectrum detection device includes：
Laser, for emitting exciting light；
Optical module comes from the sample for guiding the exciting light to sample along the first light path and being collected along the second light path
Optical signal；With
Spectrometer, for being divided the optical signal collected by optical module to generate the Raman spectrum of detected sample,
The optical module includes the first optical element, which is configured to transport during exciting light irradiating sample
It moves to change the position of hot spot of the exciting light on sample.
2. Raman spectrum detection device according to claim 1, which is characterized in that the first optical element is further constructed
It rotates at around an axis, is moved on sample with general toroidal track with guiding exciting light to be radiated at the hot spot on sample.
3. Raman spectrum detection device according to claim 2, which is characterized in that the first optical element is further constructed
It is moved at along the axis, to change the radius of general toroidal track of the hot spot on sample.
4. Raman spectrum detection device according to claim 3, which is characterized in that the first optical element is further constructed
It is rotated at the axis is surrounded while being moved along the axis, to guide the hot spot with substantially spiral trajectory in sample
It is moved on product.
5. Raman spectrum detection device according to claim 3, which is characterized in that the Raman spectrum detection device further includes
Driving mechanism, the driving mechanism are configured to the first optical element of driving and are rotated around the axis and/or along the axis
It is mobile.
6. Raman spectrum detection device according to claim 2, which is characterized in that the axis passes through the first optical element
Center.
7. Raman spectrum detection device according to claim 2, which is characterized in that
A part for first light path is coaxial with the second light path, and first optical element positions between laser and sample
In second light path, and the axis is parallel to second light path；Or
First light path and the second light path are off-axis, and first optical element is located in the first light path, and the axis
First light path is parallel to from laser to the part of the first optical element.
8. the Raman spectrum detection device according to any one of claim 1-7, which is characterized in that the first optical element packet
Include wedge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721858790.2U CN207779899U (en) | 2017-12-26 | 2017-12-26 | Raman spectrum detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721858790.2U CN207779899U (en) | 2017-12-26 | 2017-12-26 | Raman spectrum detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207779899U true CN207779899U (en) | 2018-08-28 |
Family
ID=63224975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721858790.2U Active CN207779899U (en) | 2017-12-26 | 2017-12-26 | Raman spectrum detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207779899U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884389A (en) * | 2017-12-26 | 2018-04-06 | 同方威视技术股份有限公司 | Raman spectrum detection device and method |
-
2017
- 2017-12-26 CN CN201721858790.2U patent/CN207779899U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884389A (en) * | 2017-12-26 | 2018-04-06 | 同方威视技术股份有限公司 | Raman spectrum detection device and method |
| WO2019128799A1 (en) * | 2017-12-26 | 2019-07-04 | 同方威视技术股份有限公司 | Raman spectroscopy detection device and method |
| US11035796B2 (en) | 2017-12-26 | 2021-06-15 | Nuctech Company Limited | Raman spectrum detection apparatus and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103076310B (en) | Spectrum detection system for material component analysis and detection method thereof | |
| US9869585B2 (en) | Dual spectrometer | |
| CN207923718U (en) | Raman spectrum detection device | |
| US8080796B1 (en) | Standoff spectroscopy using a conditioned target | |
| US7209237B2 (en) | Optical system for analyzing multi-channel samples and multi-channel sample analyzer employing the same | |
| AU2012350656B2 (en) | Apparatus for testing samples using Raman radiation | |
| CN102519936A (en) | Detection apparatus for contraband based on Raman spectral analysis technique | |
| CN105739104A (en) | Multi-beam coupling device and detection air chamber | |
| US20180299328A1 (en) | Improved raman spectroscopy system | |
| EP3022535B1 (en) | Diffuse reflectance infrared fourier transform spectroscopy | |
| CN104458697A (en) | Portable raman spectrum explosive identifier | |
| CN207779899U (en) | Raman spectrum detection device | |
| CN107884389A (en) | Raman spectrum detection device and method | |
| US10175171B2 (en) | Compact multi-UV-LED probe system and methods of use thereof | |
| EP3175221B1 (en) | Raster optic device for optical hyper spectral scanning | |
| CN106338499A (en) | Element laser detection and analysis instrument and mineral element analysis method | |
| CN108593631A (en) | A kind of method of aerosol auxiliary laser probe in detecting molecular radical spectrum | |
| CN205449805U (en) | Surface reinforcing raman spectroscopy test system | |
| TW201243314A (en) | Resin identification device | |
| KR20170106776A (en) | Laser induced breakdown spectroscopy apparatus and highly sensitive handpiece | |
| CN108152265A (en) | Raman spectrum detection device and its monitoring method for detecting safety | |
| JP2004340589A (en) | Fluorescence detecting method and fluorescence detector | |
| Si et al. | Detection of powder samples based on UV Raman-fluorescence spectroscopy | |
| CN115112627A (en) | Differential Raman detection device | |
| CN118483202A (en) | LIBS fluorescence spectrum collecting and detecting device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |