CN209086144U - A kind of handheld Raman spectrometer using dual-wavelength laser - Google Patents
A kind of handheld Raman spectrometer using dual-wavelength laser Download PDFInfo
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- CN209086144U CN209086144U CN201821914006.XU CN201821914006U CN209086144U CN 209086144 U CN209086144 U CN 209086144U CN 201821914006 U CN201821914006 U CN 201821914006U CN 209086144 U CN209086144 U CN 209086144U
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Abstract
The utility model embodiment discloses a kind of handheld Raman spectrometer using dual-wavelength laser, is related to spectral detection field, and the handheld Raman spectrometer includes: spectral analysis module；Data processing module；Laser module, for emitting first and/or second wave length laser；Probe module, it is equipped with laser narrow-band optical filter, dichroic piece, long pass filter and lens, thus by described first and/or second wave length laser irradiation to sample, and the first and/or second Raman diffused light that the sample is stimulated and is generated is sent into spectral analysis module.
Description
Technical field
The utility model embodiment is related to spectral detection field, in particular to a kind of hand-held using dual-wavelength laser is drawn
Graceful spectrometer.
Background technique
Raman spectrum detection technique uses the Raman diffused light of laser excitation sample, and carries out spectrum point to Raman diffused light
Analysis, obtains the information such as ingredient and the content of sample by database comparative analysis.Since Raman spectrum detection technique makes
Used time does not need to carry out sample pre-treatments, can quickly obtain the composition information of sample in seconds, and have very high
Accuracy, therefore Raman spectrum detection technique is in food safety detection, drug detection, illicit drugs inspection, gemstone testing, environmental monitoring
Equal fields have obtained more and more applications.
With the micromation of device components and the raising of integrated level, the volume of Raman spectrum detection device constantly reduces.
Occur a plurality of handheld Raman spectrometers currently on the market.Handheld Raman spectrometer compact, it is easy to operate, it can be with
Fast and accurately detection identification is carried out to sample at detection scene, greatly improves detection efficiency.
Using different wave length laser irradiation sample when, sample issue optical signal there are certain difference.On the one hand, sample
The intensity of Raman diffused light and the biquadratic of optical maser wavelength that product issue are inversely proportional, and using the shorter laser of wavelength, sample is issued
Raman diffused light intensity it is bigger；But then, many substances can be simultaneously emitted by drawing when being irradiated by short wavelength laser
Graceful scattering light and fluorescence, and the intensity of fluorescence is commonly greater than the intensity of Raman diffused light, to be brought sternly to Raman spectrum analysis
The interference of weight, this just needs to select the laser of suitable wavelength to carry out Raman spectrum detection different material.
However, being limited by equipment volume, a kind of laser of wavelength is used only in existing handheld Raman spectrometer, this
After the laser excitation of a wavelength goes out the Raman diffused light of sample, handheld Raman spectrometer can only be directed to the Raman diffused light
It is collected and analysis is handled, certain limitation is brought to the application of handheld Raman spectrometer.Therefore need one kind right
Different types of substance carries out the handheld Raman spectrometer of Raman spectrum detection.
Utility model content
A kind of handheld Raman spectrometer using dual-wavelength laser provided by the embodiment of the utility model, using dual wavelength
Laser carries out Raman spectrum detection to different types of substance.
A kind of handheld Raman spectrometer using dual-wavelength laser provided by the embodiment of the utility model, the hand-held
Raman spectrometer includes:
Spectral analysis module is configured to access the Raman diffused light that sample generates under laser irradiation, and generates
The corresponding Raman spectrum data of the Raman diffused light；
Data processing module is configured to receive the Raman spectrum data from the spectral analysis module, and to described
Raman spectrum data is analyzed, and the material composition information of the sample is obtained；
The handheld Raman spectrometer further include:
Laser module, for emitting first and/or second wave length laser；
Probe module, by described first and/or second wave length laser irradiation to sample, and by the detected sample
The first and/or second Raman diffused light that product are stimulated and generate is sent into spectral analysis module；
Wherein, the probe module is equipped with laser narrow-band optical filter, dichroic piece, long pass filter and lens；
Wherein, described first and/or second wave length laser be irradiated to institute after the laser narrow-band optical filter filters out veiling glare
Dichroic piece is stated, then reflexes to the lens through the dichroic piece, by being irradiated to the sample after lens convergence
Surface；
Wherein, the sample is stimulated and the described first and/or second Raman diffused light for generating is via described
Mirror is irradiated to the dichroic piece, then is transmitted through the long pass filter through the dichroic piece, is filtered by the long pass filter
Except being sent into the spectral analysis module after laser.
Preferably, the first wave length of the first wave length laser is greater than the second wave length of the second wave length laser.
Preferably, the first wave length is 785 nanometers or 830 nanometers or 1064 nanometers, and the second wave length is received for 532
Rice.
Preferably, the laser narrow-band optical filter is the filter that high transmittance is all had to first and second wavelength laser
Mating plate.
Preferably, the dichroic piece is low transmission rate to be all had to first and second wavelength laser and to described
One and second Raman diffused light have high-transmission rate optical filter.
Preferably, the long pass filter is that low transmission rate and right is all had to described first and the second wave length laser
First and second Raman diffused light all has the optical filter of high-transmission rate.
A kind of handheld Raman spectrometer using dual-wavelength laser is realized in the utility model embodiment offer, with energy
The laser module for generating two kinds of wavelength lasers can use two kinds under conditions of keeping handheld device smaller size smaller simultaneously
The laser of wavelength excites sample, and to sample issue two kinds of wave bands Raman diffused light be collected and
Spectrum analysis processing, a kind of Raman spectrum detection of optical maser wavelength can only be carried out not by making up existing handheld Raman spectrometer
Foot, has expanded the application range of handheld Raman spectrometer.
Detailed description of the invention
Fig. 1 is a kind of structure of handheld Raman spectrometer using dual-wavelength laser provided by the embodiment of the utility model
Schematic diagram；
Fig. 2 is the structure of the probe module in a kind of handheld Raman spectrometer using dual-wavelength laser that Fig. 1 is provided
Schematic diagram；
Fig. 3 a to Fig. 3 c is that a kind of of the utility model embodiment uses dual wavelength (532 nanometers+785 nanometers) laser respectively
Handheld Raman spectrometer probe module used in laser narrow-band optical filter, dichroic piece, long pass filter transmission
Rate spectral curve；
Fig. 4 is a kind of realization of handheld Raman spectrometer using dual-wavelength laser provided by the embodiment of the utility model
The flow diagram of method.
Specific embodiment
The utility model embodiment is described in detail below in conjunction with attached drawing, it should be understood that implementation described below
Example is only used for describing and explaining the present invention, and is not used to limit the utility model.
Existing handheld Raman spectrometer, due to the limitation of equipment volume, no image of Buddha large size Raman spectroscopy equipment is such
Be integrated with the laser of multiple wavelength, and have sufficiently large space can the Raman diffused light to multiple wave bands carry out spectrum respectively
Analysis.In order to use handheld Raman spectrometer, realizes and Raman spectrum detection is carried out to different types of substance, this is practical
The handheld Raman spectrometer of new embodiment uses dual-wavelength laser.Below with reference to Fig. 1 to Fig. 4, the utility model is implemented
Example is described in detail.
Fig. 1 is a kind of structure of handheld Raman spectrometer using dual-wavelength laser provided by the embodiment of the utility model
Schematic diagram, as shown in Figure 1, the handheld Raman spectrometer using dual-wavelength laser includes: laser module, probe mould
Block, spectral analysis module and data processing module.
The laser module can export the laser of two kinds of wavelength for transmitting first and/or second wave length laser,
To excite the Raman diffused light of sample, may be embodied as with first laser device (transmitting first wave length laser) and second
The module of laser (transmitting second wave length laser).
Generally, optical maser wavelength is usually 785 nanometers, 532 nanometers, 830 nanometers, 1064 nanometers etc., is set keeping hand-held
Under conditions of standby smaller size smaller, the utility model embodiment is swashed using the laser that can produce two kinds of wavelength lasers, first wave length
The first wave length of light is greater than the second wave length of second wave length laser, such as the first wave length can choose as 785 nanometers or 830
Nanometer or 1064 nanometers, it is 532 nanometers that the second wave length, which can choose,.For the substance of fluorescence will not be generated, wavelength is selected
Shorter second wave length laser carries out Raman spectrum detection under lesser laser power；For the substance of fluorescence can be generated, it is
The disturbing effect for avoiding fluorescence selects longer wavelengths of first wave length laser, and carries out Raman using biggish laser power
Spectral detection.
The probe module, by described first and/or second wave length laser irradiation to sample, and by detected sample
The first and/or second Raman diffused light that product are stimulated and generate is sent into spectral analysis module, can be both wavelength
Laser is effectively focused and is irradiated on sample, and can effectively collect the Raman of two kinds of wave bands of sample sending
Scatter light.
The spectral analysis module (or spectrometer), is configured to access the Raman that sample generates under laser irradiation
Light is scattered, and generates the corresponding Raman spectrum data of the Raman diffused light, in the present invention, is configured to access tested
The first Raman diffused light that sample generates under first wave length laser irradiation, and generate first Raman diffused light corresponding
One Raman spectrum data, and it is configured to access the second Raman scattering that sample generates under second wave length laser irradiation
Light, and corresponding second Raman spectrum data of second Raman diffused light is generated, it can be to the Raman scattering of two kinds of wave bands
Light carries out spectrum analysis, respectively obtains the Raman spectrum data of the Raman diffused light of two kinds of wave bands.
The data processing module (or data processor, such as central processing unit, digital signal processor or microprocessor
Deng), it is configured to receive the Raman spectrum data from the spectral analysis module, and divide the Raman spectrum data
Analysis, obtains the material composition information of sample, in the present invention, is configured to receive from the spectral analysis module
The first Raman spectrum data, and first Raman spectrum data is analyzed, obtains the material composition letter of sample
Breath, and it is configured to receive the second Raman spectrum data from the spectral analysis module, and to second Raman spectrum
Data are analyzed, and the material composition information of sample is obtained, can be to the Raman light of the Raman diffused light of two kinds of wave bands
Modal data is handled, and is analyzed by algorithm, and the material composition information of sample is obtained.
The laser module, the probe module, the spectral analysis module and the data processing module are compact
Be integrated in inside handheld Raman spectrometer so that whole equipment have it is lesser, the volume used can be held.
Fig. 2 is the structure of the probe module in a kind of handheld Raman spectrometer using dual-wavelength laser that Fig. 1 is provided
Schematic diagram, as shown in Figure 2.
The laser module is the small size laser that can export two kinds of wavelength lasers simultaneously, and optical maser wavelength is
It is commonly used in the combination of two kinds of optical maser wavelength of Raman spectrum detection, 532 nanometers+785 nanometers is can be, is also possible to 532
+ 830 nanometers of nanometer etc..
The probe module includes laser narrow-band optical filter 1, dichroic piece 2, long pass filter 3 this three tablet filter and one
A lens 4.Wherein, the laser narrow-band optical filter 1, the dichroic piece 2, described this three tablet filter of long pass filter 3 be not
Just for the laser work of a wavelength, but the laser of two kinds of wavelength can be worked at the same time.Specifically, the laser is narrow
Effect with optical filter 1 is the veiling glare being filtered to remove in the laser of laser sending, so that pure laser irradiation is to dichroic
Piece 2, i.e., in the present invention, the laser narrow-band optical filter 1 can be filtered to remove miscellaneous in the laser of two kinds of wavelength simultaneously
Light, so that the laser irradiation of two kinds of pure wavelength is to dichroic piece 2.The effect of the dichroic piece 2 is reflection laser, and is made
Probe collection to the Raman diffused light of sample be transmissive to through dichroic piece 2, i.e., it is in the present invention, described
The drawing of two kinds of wave bands of the sample that dichroic piece 2 can reflect simultaneously the laser of two kinds of wavelength, and probe collection is arrived
Graceful scattering light can be transmitted through dichroic piece 2.The effect of the long pass filter 3 is to be filtered to remove in Raman diffused light to wrap
The laser signal contained, i.e., in the present invention, the long pass filter 3 can be filtered to remove the Raman scattering of two kinds of wave bands simultaneously
The laser signal for two wavelength for including in light.That is, described first and/or second wave length laser through the laser narrow-band
Optical filter is irradiated to the dichroic piece after filtering out veiling glare, then reflexes to the lens through the dichroic piece, by the lens
The sample surface is irradiated to after convergence；The sample is stimulated and the described first and/or second Raman for generating
It scatters light and is transmitted through the long pass filter to the dichroic piece, then through the dichroic piece via the lens lighting, by
The long pass filter is sent into the spectral analysis module after filtering out laser.
The spectral analysis module can cover two kinds with wider wavelength band using existing spectrometer
The wave band of Raman diffused light, to obtain the spectral information for the Raman diffused light that sample is inspired in two kinds of wavelength lasers
(or Raman spectrum data).In other words, common Raman spectrometer is due to only needing the drawing to certain single optical maser wavelength generation
Graceful scattering light carries out spectrum analysis, therefore the wavelength band of spectral analysis module therein is exactly the wave of this Raman diffused light
Section, such as when using 532 nanometers of laser, the spectral band of the Raman diffused light of laser generation are usually 535 nanometers~650 to receive
Rice；When with 785 nanometers of laser, the spectral band for the Raman diffused light that laser generates is usually 800 nanometers~1050 nanometers.This
The Raman diffused light that the hand-held Raman spectrometer of the dual-wavelength laser of utility model can generate two laser carries out light simultaneously
Spectrum analysis, therefore the wavelength band of spectral analysis module covers two wave bands, for example 532 nanometers+785 nanometers of double excitation is held
Raman spectrometer, the wavelength band of spectral analysis module are 535 nanometers~1050 nanometers, this wider wave band contains
535~650 nanometers of the Raman scattering optical band of 532 nanometer lasers also contains the Raman scattering optical band of 785 nanometer lasers
800~1050 nanometers, therefore spectrum analysis can be carried out to the Raman diffused light of the two wave bands simultaneously.
At work, two kinds of wavelength of laser module output swash the handheld Raman spectrometer combined with Figure 1 and Figure 2,
Light is irradiated to sample surface after probe module, and laser excitation goes out the Raman diffused light of two kinds of wave bands of sample.Sample
Raman diffused light collected by probe module after, reach spectral analysis module.Two kind waves of the spectral analysis module to sample
The Raman diffused light of section carries out spectrum analysis, and spectroscopic data is transferred to data processing module.Data processing module is calculated
Method comparative analysis obtains the material composition information of sample.Specifically, when the laser of two kinds of wavelength of laser module output
When being irradiated to the laser narrow-band optical filter 1 of probe module, due to the laser narrow-band optical filter 1 the position of two optical maser wavelength all
With biggish transmitance (95%-100%), and the transmitance at other wavelength is close to zero, as shown in Figure 3a, therefore can mistake
The veiling glare in the laser of both wavelength is filtered out, the laser of two kinds of pure wavelength is obtained.It filters when have passed through laser narrow-band
When the laser irradiation of two kinds of wavelength after piece 1 is to dichroic piece 2, due to the dichroic piece 2 the position of two optical maser wavelength all
With lower transmissivity (close to 0-10%), as shown in Figure 3b, therefore the laser of both wavelength is reflected into lens simultaneously
4, and be radiated on sample by lens 4, to inspire the Raman diffused light of two kinds of wave bands of sample.When this two
When the Raman diffused light of kind wave band is irradiated to dichroic piece 2 by lens 4, since the dichroic piece 2 is in the two Raman scatterings
The wave band of light transmissivity (90%-100%) all with higher, as shown in Figure 3b, therefore the Raman diffused light of the two wave bands
It can be irradiated on long pass filter 3 through dichroic piece 2.When the Raman diffused light of the two wave bands is irradiated to long pass filter
When on 3, since the long pass filter 3 is in the wave band transmissivity (90%- all with higher of the two Raman diffused lights
100%) all, while in the position of two optical maser wavelength there is very low transmissivity (close to 0), as shown in Figure 3c, therefore can be with
It is filtered to remove the laser signal of two wavelength in the Raman diffused light of two kinds of wave bands included simultaneously.When being filtered to remove two waves
When the Raman diffused light of long laser is transferred to spectral analysis module, since the spectral analysis module has wider wavelength band,
Can cover the wave band of two kinds of Raman diffused lights, thus can the Raman diffused light to two wave bands carry out spectrum analysis, obtain two
The Raman spectrum data information of a wave band.Data processing module carries out algorithm analysis to the Raman spectrum data information of two wave bands
Processing, can obtain the material composition information of more accurate sample.
The equipment of the utility model embodiment can carry out Raman light to sample using the laser of two kinds of wavelength simultaneously
Spectrum detection, can be improved the accuracy of Raman spectrum detection, and equipment volume is small and exquisite, can hold use, can expand hand-held
The application range of formula Raman spectrometer.
Application example 1
Assuming that using the laser module in the handheld Raman spectrometer of dual-wavelength laser can be with launch wavelength
532 nanometers of second wave length laser and wavelength is 785 nanometers of first wave length laser, and user can rule of thumb determine it is a certain
The whether capable of emitting fluorescence of sample.
The course of work of the handheld Raman spectrometer can be such that
If it is determined that the capable of emitting fluorescence of sample, then the laser module issues that wavelength is 785 nanometers
One wavelength laser avoids generating fluorescence, when the laser narrow-band optical filter 1 of the first wave length laser irradiation to probe module, institute
The veiling glare that laser narrow-band optical filter 1 is filtered to remove in first wave length laser is stated, so that pure first wave length laser irradiation is to two
To color chips 2；First wave length laser reflection to lens 4 is irradiated the detected sample after converging via lens 4 by the dichroic piece 2
Product surface；For the sample after by first wave length laser excitation, sample surface issues the first spectrum, first light
It include 800~1050 nanometers of wave band of the first Raman diffused light and first wave length laser in spectrum；First spectrum is via lens
It is irradiated to dichroic piece 2；The first spectral transmission dichroic piece 2 exposes to long pass filter 3；3 mistake of long pass filter
The first wave length laser in the first spectrum is filtered out, the first Raman diffused light is obtained, spectral analysis module is sent into and carries out spectrum point
Analysis, to determine the material composition of sample.Similarly, if it is determined that the not capable of emitting fluorescence of the sample, then it is described to swash
Light device module issues the second wave length laser that wavelength is 532 nanometers, the laser of the second wave length laser irradiation to probe module
When narrow band filter 1, the laser narrow-band optical filter 1 is filtered to remove the veiling glare in second wave length laser, so that pure second
Wavelength laser is irradiated to dichroic piece 2；The dichroic piece 2 converges second wave length laser reflection to lens 4 via lens 4
After irradiate the sample surface；After by second wave length laser excitation, sample surface issues the sample
Second spectrum includes 535~650 nanometers of wave band of the second Raman diffused light and second wave length laser in second spectrum；It is described
Second spectrum is via lens lighting to dichroic piece 2；The second spectral transmission dichroic piece 2 exposes to long pass filter 3；Institute
The second wave length laser that long pass filter 3 is filtered to remove in the second spectrum is stated, the second Raman diffused light is obtained, is sent into spectrum analysis
Module carries out spectrum analysis, to determine the material composition of sample.
Application example 2
Assuming that using the laser module in the handheld Raman spectrometer of dual-wavelength laser can be with launch wavelength
The first wave length laser that 532 nanometers of second wave length laser and wavelength is 785 nanometers, and user is rule of thumb, it is difficult to determine certain
The whether capable of emitting fluorescence of one sample.
The course of work of the handheld Raman spectrometer can be such that
The laser module issues the second wave length laser that wavelength is 532 nanometers, and the second wave length laser irradiation arrives
When the laser narrow-band optical filter 1 of probe module, the laser narrow-band optical filter 1 is filtered to remove the veiling glare in second wave length laser,
So that pure second wave length laser irradiation is to dichroic piece 2；The dichroic piece 2 by second wave length laser reflection to lens 4,
The sample surface is irradiated after converging via lens 4；The sample is described tested after by second wave length laser excitation
Sample surfaces issue the second spectrum, include 535~650 nanometers of wave band of the second Raman diffused light and the second wave in second spectrum
Long laser, but whether be unknown comprising fluorescence；Second spectrum is via lens lighting to dichroic piece 2；Second light
Spectrum exposes to long pass filter 3 through dichroic piece 2；The long pass filter 3 is filtered to remove the second wave length in the second spectrum
Laser is obtained optical filtering and composes, and is sent into spectral analysis module and carries out spectrum analysis, if the spectral intensity of the filtering spectrum is greater than in advance
If Raman diffused light spectral intensity, it is determined that the filtering spectrum is the mixed spectra of fluorescence and second Raman diffused light,
Illustrate the capable of emitting fluorescence of the sample, otherwise determines that the filtering spectrum is second Raman diffused light, described in explanation
The not capable of emitting fluorescence of sample.
If it is determined that the capable of emitting fluorescence of sample, then the laser module issues that wavelength is 785 nanometers
One wavelength laser avoids generating fluorescence, when the laser narrow-band optical filter 1 of the first wave length laser irradiation to probe module, institute
The veiling glare that laser narrow-band optical filter 1 is filtered to remove in first wave length laser is stated, so that pure first wave length laser irradiation is to two
To color chips 2；First wave length laser reflection to lens 4 is irradiated the detected sample after converging via lens 4 by the dichroic piece 2
Product surface；For the sample after by first wave length laser excitation, sample surface issues the first spectrum, first light
It include 800~1050 nanometers of wave band of the first Raman diffused light and first wave length laser in spectrum；First spectrum is via lens
It is irradiated to dichroic piece 2；The first spectral transmission dichroic piece 2 exposes to long pass filter 3；3 mistake of long pass filter
The first wave length laser in the first spectrum is filtered out, the first Raman diffused light is obtained, spectral analysis module is sent into and carries out spectrum point
Analysis, to determine the material composition of sample.
If it is determined that the not capable of emitting fluorescence of the sample, then spectral analysis module can be directly to described in preceding obtain
It filters spectrum (i.e. described second Raman diffused light) and carries out spectrum analysis, to determine the material composition of sample.
Application example 3
Assuming that using the laser module in the handheld Raman spectrometer of dual-wavelength laser can be with launch wavelength
The first wave length laser that 532 nanometers of second wave length laser and wavelength is 785 nanometers, and user is rule of thumb, it is difficult to determine certain
The whether capable of emitting fluorescence of one sample.
The course of work of the handheld Raman spectrometer can be such that
The laser module be simultaneously emitted by the first wave length laser that wavelength is 785 nanometers and wavelength be 532 nanometers
Two wavelength lasers, when first and second wavelength laser is irradiated to the laser narrow-band optical filter 1 of probe module, the laser is narrow
It is filtered to remove the veiling glare in the first and second wavelength lasers with optical filter 1, so that the first and second pure wavelength lasers irradiate
To dichroic piece 2；First and second wavelength lasers are reflexed to lens 4 by the dichroic piece 2, are irradiated after converging via lens 4
The sample surface；After the sample is excited by the first and second wavelength lasers, the sample surface is issued
First and second spectrum, the first Raman diffused light and first wave length in first spectrum comprising 800~1050 nanometers of wave band swash
Light, includes 535~650 nanometers of wave band of the second Raman diffused light and second wave length laser in second spectrum, but whether include
Fluorescence is unknown；First and second spectrum is via lens lighting to dichroic piece 2；First and second spectral transmission
Dichroic piece 2 exposes to long pass filter 3；The long pass filter 3 is filtered to remove first and in the first and second spectrum
Two wavelength lasers respectively obtain the first Raman diffused light and filtering spectrum, are sent into spectral analysis module and carry out spectrum analysis, and will
Spectroscopic analysis results are sent into data processing module and carry out algorithm analysis processing；If to the analysis and processing result of the first Raman diffused light
It is consistent with to the filtering analysis and processing result of spectrum, illustrate the not capable of emitting fluorescence of the sample, can directly export at analysis
Reason exports the analysis and processing result to the first Raman diffused light as a result, otherwise illustrate the capable of emitting fluorescence of the sample at this time.
In implementation process, button can be set in handheld Raman spectrometer, so that user manually controls laser
Module emits at least one laser in first wave length laser and second wave length laser, can also be in handheld Raman spectrometer
Touch screen is set, it, at this time can be hand-held so that user's input is used to refer to whether tested sample can issue the information of fluorescence
Increase a controller in formula Raman spectrometer, is used cooperatively with laser module and touch screen, if controller receives user
When the information for indicating the capable of emitting fluorescence of sample inputted by touch screen, triggering laser module issues first wave length and swashs
Light, if controller receives the information for the not capable of emitting fluorescence of instruction sample that user is inputted by touch screen, triggering swashs
Light device module issues second wave length laser, if controller receives the instruction that user is inputted by touch screen and can not confirm detected sample
When whether product issue the information of fluorescence, triggering laser module issues second wave length laser, is tested, can also trigger laser
Device module is simultaneously emitted by the first and second wavelength lasers.It include but is not limited to upper type when specific implementation.
Can be seen that the utility model from use above example can be in the item for keeping handheld Raman spectrometer smaller size smaller
Under part, using the raman spectral signal of dual-wavelength laser excitation sample, single wavelength laser is avoided to carry out Raman spectrum inspection
The deficiency of survey promotes the detection accuracy and application range of handheld Raman spectrometer.
Fig. 4 is a kind of realization of handheld Raman spectrometer using dual-wavelength laser provided by the embodiment of the utility model
The flow diagram of method, as shown in figure 4, the method may include:
Step S101: setting can emit the laser of first wave length laser and second wave length laser, wherein the first wave
It is long to be greater than the second wave length.
Wherein, the first wave length can be 785 nanometers or 830 nanometers or 1064 nanometers, and the second wave length can be
532 nanometers.
Step S102: the whether capable of emitting fluorescence of sample is determined.
In one embodiment, information is inputted according to user, determines the whether capable of emitting fluorescence of the sample, i.e., really
It whether there is the substance of capable of emitting fluorescence in the fixed sample.
Present embodiment is suitable for the user (or reviewer) with certain identification of experience, i.e. user can be according to warp
It tests, information is inputted, so that handheld Raman spectrometer be made to determine the whether capable of emitting fluorescence of sample.
In another embodiment, the second wave length Laser emission is obtained into the quilt to the sample surface
Second spectrum of sample surface emitting, and during receiving second spectrum, it filters out described present in second spectrum
Optical filtering spectrum is obtained in second wave length laser, then determines that the filtering spectrum is the mixed of fluorescence and second Raman diffused light
Light combination spectrum or second Raman diffused light, however, it is determined that the filtering spectrum is the fluorescence and second Raman diffused light
Mixed spectra, illustrate that there are the substances of capable of emitting fluorescence in the sample, at this time determine the capable of emitting fluorescence of sample,
If it is determined that the filtering spectrum is second Raman diffused light, illustrate the object that capable of emitting fluorescence is not present in the sample
Matter determines the not capable of emitting fluorescence of sample at this time.
In the present embodiment, if the spectral intensity of the filtering spectrum is greater than default Raman diffused light spectral intensity,
It determines that the filtering spectrum is the mixed spectra of fluorescence and second Raman diffused light, otherwise determines that the filtering spectrum is institute
State the second Raman diffused light.
Present embodiment, which is suitable for user, not to be had identification of experience or can not empirically judge sample by short wavelength
The scene of fluorescence whether can be issued after laser excitation, i.e., in such a way that short wavelength laser is soundd out, determine that the sample is
No capable of emitting fluorescence.
Step S103: if it is determined that the capable of emitting fluorescence of the sample, then to quilt described in the first wave length laser excitation
First Raman diffused light obtained from sample is analyzed, and determines the ingredient of the sample.
In one embodiment, after determining the capable of emitting fluorescence of the sample, the first wave length can be swashed
Light emitting obtains the first spectrum of the sample surface emitting to the sample surface, and is receiving described first
During spectrum, the first wave length laser present in first spectrum is filtered out, obtains first Raman diffused light, then
Using existing analysis method, first Raman diffused light is analyzed, determines the ingredient of the sample.
Step S104: if it is determined that the not capable of emitting fluorescence of the sample, then to described in the second wave length laser excitation
Second Raman diffused light obtained from sample is analyzed, and determines the ingredient of the sample.
In one embodiment, if inputting information according to user, it has been determined that the not capable of emitting fluorescence of the sample,
Then the second wave length Laser emission to the sample surface can be obtained into the second of the sample surface emitting
Spectrum, and during receiving second spectrum, the second wave length laser present in second spectrum is filtered out, institute is obtained
The second Raman diffused light is stated, existing analysis method is then used, second Raman diffused light is analyzed, described in determination
The ingredient of sample.
In another embodiment, if in such a way that short wavelength laser is soundd out, it has been determined that the sample can not
Fluorescence is issued, then uses existing analysis method, second Raman diffused light obtained after can souning out short wavelength laser
It is analyzed, determines the ingredient of the sample.
In embodiment of above, the first or second wavelength laser is successively filtered via laser narrow-band optical filter veiling glare
It removes, the reflection of dichroic piece, after optical lens convergence, be irradiated to the sample surface, obtain sample surface hair
The first or second spectrum penetrated.
In embodiment of above, the first or second spectrum through the optical lens convergence after, via described two to
Color chips is transmitted through long pass filter, and filters out described first present in the first or second spectrum through the long pass filter
Or after second wave length laser, the first or second Raman diffused light is obtained.
It should be noted that the laser narrow-band optical filter be first and second wavelength laser is all had it is higher
Cross the optical filter of rate.
It should be noted that the dichroic piece is to all have described first and the second wave length laser compared with low transmission
Rate and the optical filter to first and second Raman diffused light with high transmittance.
It should be noted that the long pass filter be described first and the second wave length laser are all had it is lower
It penetrates rate and there is the optical filter of high transmittance to first and second Raman diffused light.
Handheld Raman spectrometer provided by the embodiment of the utility model using dual-wavelength laser is keeping equipment volume
It is small and exquisite, use can be held under conditions of, can simultaneously using two kinds of wavelength laser to sample carry out Raman spectrum inspection
It surveys, the deficiency of Raman spectrum detection of single wavelength can only be carried out by compensating for existing handheld Raman spectrometer.For having
The sample of fluorescent effect, using two kinds of longer laser of wavelength medium wavelength, to avoid the fluorescence of sample to Raman signal
Interference；For the sample of not fluorescent effect, using the shorter laser of two kinds of wavelength medium wavelengths, can obtain sample compared with
Strong raman spectral signal.The laser of two kinds of wavelength can also be used simultaneously, two wave bands that two kinds of wavelength lasers are obtained
Raman diffused light carries out spectrum analysis, the in this way Raman spectrum analysis relative to a kind of optical maser wavelength simultaneously, it may have higher
Detection accuracy.These features all improve the practical performance of handheld Raman spectrometer.
Although the utility model is described in detail above, the utility model is without being limited thereto, the art
Technical staff can be carry out various modifications with principle according to the present utility model.Therefore, all according to made by the utility model principle
Modification, all should be understood as falling into the protection scope of the utility model.
Claims (6)
1. a kind of handheld Raman spectrometer using dual-wavelength laser, the handheld Raman spectrometer include:
Spectral analysis module is configured to access the Raman diffused light that sample generates under laser irradiation, and described in generation
The corresponding Raman spectrum data of Raman diffused light；
Data processing module is configured to receive the Raman spectrum data from the spectral analysis module, and to the Raman
Spectroscopic data is analyzed, and the material composition information of the sample is obtained；
It is characterized in that, the handheld Raman spectrometer further include:
Laser module, for emitting first and/or second wave length laser；
Probe module, by described first and/or second wave length laser irradiation to sample, and by the sample by
The first and/or second Raman diffused light feeding spectral analysis module of excitation and generation；
Wherein, the probe module is equipped with laser narrow-band optical filter, dichroic piece, long pass filter and lens；
Wherein, described first and/or second wave length laser be irradiated to described two after the laser narrow-band optical filter filters out veiling glare
The lens are reflexed to color chips, then through the dichroic piece, by being irradiated to the sample surface after lens convergence；
Wherein, the described first and/or second Raman diffused light that the sample is stimulated and generates shines via the lens
It is mapped to the dichroic piece, then is transmitted through the long pass filter through the dichroic piece, is filtered out by the long pass filter sharp
The spectral analysis module is sent into after light.
2. handheld Raman spectrometer according to claim 1, which is characterized in that the first wave of the first wave length laser
The long second wave length for being greater than the second wave length laser.
3. handheld Raman spectrometer according to claim 2, which is characterized in that the first wave length be 785 nanometers or
830 nanometers or 1064 nanometers, the second wave length is 532 nanometers.
4. handheld Raman spectrometer according to claim 1 to 3, which is characterized in that the laser narrow-band filter
Mating plate is the optical filter that high transmittance is all had to first and second wavelength laser.
5. handheld Raman spectrometer according to claim 1 to 3, which is characterized in that the dichroic piece is
Low transmission rate is all had to first and second wavelength laser and is had to first and second Raman diffused light highly transmissive
The optical filter of rate.
6. handheld Raman spectrometer according to claim 1 to 3, which is characterized in that the long pass filter
It is that low transmission rate is all had to described first and the second wave length laser and is had to first and second Raman diffused light
There is the optical filter of high-transmission rate.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342394A (en) * | 2018-11-20 | 2019-02-15 | 立穹(上海)光电科技有限公司 | A kind of handheld Raman spectrometer and implementation method using dual-wavelength laser |
| CN111044458A (en) * | 2019-12-19 | 2020-04-21 | 北京云端光科技术有限公司 | Spectrometer |
| CN111562252A (en) * | 2020-06-30 | 2020-08-21 | 普识和康(杭州)科技有限公司 | Raman detection system based on coaxial dual-wavelength fluorescence elimination |
| CN111638203A (en) * | 2020-07-16 | 2020-09-08 | 江苏天瑞仪器股份有限公司 | Dual-wavelength laser confocal detection method of Raman probe |
| CN114923892A (en) * | 2022-05-24 | 2022-08-19 | 中国工程物理研究院材料研究所 | Dual-wavelength near-infrared portable Raman spectrum device |
| CN109342394B (en) * | 2018-11-20 | 2024-04-30 | 立穹(上海)光电科技有限公司 | Handheld Raman spectrometer adopting dual-wavelength laser and implementation method |
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2018
- 2018-11-20 CN CN201821914006.XU patent/CN209086144U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342394A (en) * | 2018-11-20 | 2019-02-15 | 立穹(上海)光电科技有限公司 | A kind of handheld Raman spectrometer and implementation method using dual-wavelength laser |
| CN109342394B (en) * | 2018-11-20 | 2024-04-30 | 立穹(上海)光电科技有限公司 | Handheld Raman spectrometer adopting dual-wavelength laser and implementation method |
| CN111044458A (en) * | 2019-12-19 | 2020-04-21 | 北京云端光科技术有限公司 | Spectrometer |
| CN111044458B (en) * | 2019-12-19 | 2022-06-07 | 北京云端光科技术有限公司 | Spectrometer |
| CN111562252A (en) * | 2020-06-30 | 2020-08-21 | 普识和康(杭州)科技有限公司 | Raman detection system based on coaxial dual-wavelength fluorescence elimination |
| CN111638203A (en) * | 2020-07-16 | 2020-09-08 | 江苏天瑞仪器股份有限公司 | Dual-wavelength laser confocal detection method of Raman probe |
| CN114923892A (en) * | 2022-05-24 | 2022-08-19 | 中国工程物理研究院材料研究所 | Dual-wavelength near-infrared portable Raman spectrum device |
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