CN103994973A - Raman spectrum detection head and detection method - Google Patents
Raman spectrum detection head and detection method Download PDFInfo
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- CN103994973A CN103994973A CN201410267191.8A CN201410267191A CN103994973A CN 103994973 A CN103994973 A CN 103994973A CN 201410267191 A CN201410267191 A CN 201410267191A CN 103994973 A CN103994973 A CN 103994973A
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Abstract
The invention provides a Raman spectrum detection head and a detection method. The Raman spectrum detection head comprises a light shield, wherein the light shield comprises a slit and a detection lens, the slit is used for ejecting Raman scattering light to a sample, and injecting signal light generated on the surface of the sample, the detection lens is used for ejecting the signal light; and the light shield further comprises a laser line source used for emitting linear laser, a filtration light filter used for filtering rayleigh scattering light in the linear laser to remain residual Raman scattering light, a beam-splitting light filter used for reflecting the Raman scattering light to a scanning lens and ejecting signal light reflected by the scanning lens through the detection lens, and a scanning lens, and the scanning lens reflects the Raman scattering light reflected by the beam-splitting light filter through a reciprocating vibration manner so that uniform and linear Raman scattering light is obtained so as to be enabled to be ejected to the surface of the sample through the slit, and reflects the signal light subjected to Raman detection, generated on the surface of the sample and injected through the slit, to the beam-splitting light filter. The Raman spectrum detection head is capable of performing quick movement detection and signal acquisition on a sample.
Description
Technical field
The present invention relates to optical detection field, relate in particular to a kind of Raman spectrum detection head and detection method.
Background technology
Raman scattering be light during by medium due to incident light and the molecular motion scattering that the frequency that causes changes that interacts, Raman spectrum, through being commonly used to characterize the architectural feature of molecule, is also referred to as " dactylogram " of molecule.Raman spectroscopy analysis means mainly contains the technology such as Fourier transform, high temperature, resonance, surperficial enhancing, confocal microscopy, solid optoacoustic.Raman spectrum has a wide range of applications in a lot of fields, especially its can provide fast, simple, harmless, qualitative and quantitative analysis technology repeatably, without loaded down with trivial details pre-treatment step, avoided the destruction to sample, realized the rapid of examination speed.Certainly Raman technology also comes with some shortcomings, as easily overlapping in spectrum peak, is subject to the impact of the factors such as instrument parameter, in the time that mensuration has epipolic material, can produce fluorescence and disturb, Ramam effect too a little less than, be about the 10-6 of incident intensity doubly.Although the fast development of nanometer technology provides new direction for Raman spectrum detects, strengthen the restriction of Raman signal a little less than the deep research that needs by means of nanometer technology.
In the prior art, can only utilize Raman technology to carry out a spectral detection, because Raman signal is fainter, and fluorescence background signal is more intense, although therefore Raman spectrum has very large advantage for the chemical bond identification of material, but often because detectability can not reach standard method, i.e. the spectrometric minimum content detectability of gas-phase spectrum and liquid phase, causes also existing obvious deficiency and inferior position in quantitative test.And the pick-up unit of Raman spectrum is comparatively complicated, light path is had relatively high expectations, and be not easy to move, the practical application of Raman detection has been caused to certain obstruction.
Summary of the invention
(1) technical matters that will solve
The invention provides Raman spectrum detection head and detection method, can only carry out a spectral detection to solve Raman technology in prior art, and pick-up unit is not easy to mobile technical matters.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of Raman spectrum detection head, comprise: light shield, described light shield comprises slit and detects mirror, described slit is used for making Raman diffused light outgoing to sample, and making the flashlight of described sample surfaces generation inject, described detection mirror is for flashlight described in outgoing;
In described light shield, also comprise:
Laser line light source, for launching linear laser;
Filter optical filter, for filtering the Rayleigh scattering light of described linear laser, residue Raman diffused light;
Beam splitting optical filter, for reflexing to scanning mirror through the Raman diffused light of described filtration optical filter, and makes flashlight that scanning mirror is reflected back by the outgoing of described detection mirror;
Scanning mirror, described scanning mirror reflects the Raman diffused light through described beam splitting optical filter reflection by the mode of double vibrations, to obtain uniform wire Raman diffused light, make its by described slit outgoing to sample surfaces, and the flashlight of the Raman detection that the sample surfaces injected through slit is produced reflexes to described beam splitting optical filter.
Further, between described laser line light source and described filtration optical filter, also comprise:
Collimation lens, for converging the linear laser collimation of described laser line light source transmitting into uniform directional light.
Further, described laser line light source is:
785nm laser line light source, peak power output 5w, the long laser rays of maximum output 1mm × 20cm.
Further,
Described laser line light source comprises multiple laser point light sources that are arranged in a row.
Further,
Described laser line light source comprises 9 laser point light sources that are arranged in a row.
Further,
Described laser line light source, collimation lens, filtration optical filter and beam splitting optical filter distribute point-blank successively;
Described scanning mirror, beam splitting optical filter and detection mirror are distributed on the another straight line vertical with described straight line successively;
Described scanning mirror and beam splitting optical filter are parallel to each other, respectively with these two straight lines in angle of 45 degrees.
Further, described light shield also comprises:
Handle, for moving and carry described detection head.
On the other hand, the present invention also provides a kind of Raman spectra detection process, utilizes the Raman spectrum detection head described in as above any one to carry out Raman spectrum detection, comprising:
Launch linear laser by laser line light source;
Utilize filtration optical filter to filter the Rayleigh scattering light in described linear laser, residue Raman diffused light;
Utilize beam splitting optical filter to reflex to scanning mirror the Raman diffused light after filtering;
The mode of utilizing scanning mirror to pass through double vibrations reflects described Raman diffused light, obtains uniform wire Raman diffused light, and the slit outgoing that uniform wire Raman diffused light is passed through to light shield is to sample surfaces;
Make uniform wire Raman diffused light be radiated at the flashlight of Raman detection that sample surfaces produces and be incident to scanning mirror by slit, utilize scanning mirror reflect described flashlight after beam splitting optical filter by the detection mirror outgoing on light shield.
(3) beneficial effect
Visible, in Raman spectrum detection head provided by the invention and detection method, laser line light source, filtration optical filter, beam splitting optical filter and scanning mirror are integrated in the light shield of Raman spectrum detection head, a kind of portable integrated Raman spectrum detection head is provided, can have carried out fast moving detection and signals collecting to sample.And the present invention detects sample by linear laser, solve the technical matters that can only carry out a spectral detection in the Raman detection technology of prior art, there is very high using value.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the basic structure schematic diagram of embodiment of the present invention Raman spectrum detection head;
Fig. 2 is a preferred structure schematic diagram of embodiment of the present invention Raman spectrum detection head;
Fig. 3 is the basic procedure schematic diagram of embodiment of the present invention Raman spectra detection process.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
First the embodiment of the present invention provides a kind of Raman spectrum detection head, referring to Fig. 1, comprising: light shield 1, light shield 1 comprises slit 2 and detects mirror 3, slit 2 is for making Raman diffused light outgoing to sample 4, and the flashlight that makes sample 4 surfaces produce injects, and detects mirror 3 for outgoing flashlight;
In light shield 1, also comprise:
Laser line light source 5, for launching linear laser;
Filter optical filter 6, for filtering the Rayleigh scattering light of linear laser, residue Raman diffused light;
Beam splitting optical filter 7, for reflexing to scanning mirror 8 through the Raman diffused light that filters optical filter 6, and makes the flashlight that scanning mirror 8 is reflected back pass through to detect mirror 3 outgoing;
Scanning mirror 8, scanning mirror 8 reflects the Raman diffused light reflecting through beam splitting optical filter 7 by the mode of double vibrations, to obtain uniform wire Raman diffused light, make it pass through slit 2 outgoing to sample 4 surfaces, and the flashlight of the Raman detection that the sample of injecting through slit 24 surfaces are produced reflex to beam splitting optical filter 7.
In order to obtain linear laser more uniformly, preferably, between laser line light source 5 and filtration optical filter 6, can also comprise: collimation lens 9, see Fig. 2, converge as uniform directional light for the linear laser collimation that laser line light source 5 is launched.
Preferably, laser line light source 5 can be: 785nm laser line light source, its peak power output is 5w, the laser rays that Laser output 1mm (MAX) × 20cm is long.
Preferably, laser line light source 5 can be excited and be pooled line source by multiple laser point light sources that are arranged in a row, and wherein, the number of laser point light source can be 9.
Preferably, as shown in Figure 2, laser line light source 5, collimation lens 9, filtration optical filter 6 and beam splitting optical filter 7 can distribute point-blank successively; And scanning mirror 8, beam splitting optical filter 7 and detection mirror 3 can be distributed on the another straight line vertical with above-mentioned straight line successively; Wherein scanning mirror 8 and beam splitting optical filter 7 are parallel to each other, respectively with these two straight lines in angle of 45 degrees.And, the Raman diffused light reflecting due to scanning mirror 8 need to shine on sample 4 by slit 2, the flashlight on sample 4 surfaces also needs to incide on scanning mirror 8 by slit 2, therefore, scanning mirror 8, slit 2 and sample 4 also distribute point-blank successively, and scanning mirror 8 is to be with straight line the vibration that moves in circles centered by miter angle.
In order to make the Raman spectrum detection head in the embodiment of the present invention be easy to carry and move, preferably, on light shield 1, can also comprise handle, to utilize the Raman spectrum detection head of integrated form to carry out fast moving detection and signals collecting for the sample of different occasions.
Wherein, Raman spectrum detection head in the embodiment of the present invention is in the time detecting sample, sample 4 can be placed on two-dimension translational sample stage, thereby by two-dimensional laser line sweep being carried out in its whole surface at moving in two dimensional directions sample 4, to obtain the figure spectrum information of whole sample surfaces, obtain accurate Raman spectrum more comprehensively and detect data.
The embodiment of the present invention also provides a kind of Raman spectra detection process, utilizes the Raman spectrum detection head in the embodiment of the present invention to carry out Raman spectrum detection, and as Fig. 3, concrete steps comprise:
Step 301: launch linear laser by laser line light source;
Step 302: utilize filtration optical filter to filter the Rayleigh scattering light in described linear laser, residue Raman diffused light;
Step 303: utilize beam splitting optical filter to reflex to scanning mirror the Raman diffused light after filtering;
Step 304: the mode of utilizing scanning mirror to pass through double vibrations reflects described Raman diffused light, obtains uniform wire Raman diffused light, and the slit outgoing that uniform wire Raman diffused light is passed through to light shield is to sample surfaces;
Step 305: make uniform wire Raman diffused light be radiated at the flashlight of Raman detection that sample surfaces produces and be incident to scanning mirror by slit, utilize scanning mirror reflect described flashlight after beam splitting optical filter by the detection mirror outgoing on light shield.
Visible, the embodiment of the present invention at least has following beneficial effect:
In the Raman spectrum detection head and detection method providing in the embodiment of the present invention, laser line light source, filtration optical filter, beam splitting optical filter and scanning mirror are integrated in the light shield of Raman spectrum detection head, a kind of portable integrated Raman spectrum detection head is provided, can have carried out fast moving detection and signals collecting to sample.And the embodiment of the present invention detects sample by linear laser, solve the technical matters that can only carry out a spectral detection in the Raman detection technology of prior art, there is very high using value.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a Raman spectrum detection head, is characterized in that, comprising: light shield, described light shield comprises slit and detects mirror, described slit is used for making Raman diffused light outgoing to sample, and makes the flashlight of described sample surfaces generation inject, and described detection mirror is for flashlight described in outgoing;
In described light shield, also comprise:
Laser line light source, for launching linear laser;
Filter optical filter, for filtering the Rayleigh scattering light of described linear laser, residue Raman diffused light;
Beam splitting optical filter, for reflexing to scanning mirror through the Raman diffused light of described filtration optical filter, and makes flashlight that scanning mirror is reflected back by the outgoing of described detection mirror;
Scanning mirror, described scanning mirror reflects the Raman diffused light through described beam splitting optical filter reflection by the mode of double vibrations, to obtain uniform wire Raman diffused light, make its by described slit outgoing to sample surfaces, and the flashlight of the Raman detection that the sample surfaces injected through slit is produced reflexes to described beam splitting optical filter.
2. Raman spectrum detection head according to claim 1, is characterized in that, between described laser line light source and described filtration optical filter, also comprises:
Collimation lens, for converging the linear laser collimation of described laser line light source transmitting into uniform directional light.
3. Raman spectrum detection head according to claim 1, is characterized in that, described laser line light source is:
785nm laser line light source, peak power output 5w, the long laser rays of maximum output 1mm × 20cm.
4. Raman spectrum detection head according to claim 1, is characterized in that:
Described laser line light source comprises multiple laser point light sources that are arranged in a row.
5. Raman spectrum detection head according to claim 4, is characterized in that:
Described laser line light source comprises 9 laser point light sources that are arranged in a row.
6. Raman spectrum detection head according to claim 2, is characterized in that:
Described laser line light source, collimation lens, filtration optical filter and beam splitting optical filter distribute point-blank successively;
Described scanning mirror, beam splitting optical filter and detection mirror are distributed on the another straight line vertical with described straight line successively;
Described scanning mirror and beam splitting optical filter are parallel to each other, respectively with these two straight lines in angle of 45 degrees.
7. according to the Raman spectrum detection head described in any one in claim 1 to 6, it is characterized in that, described light shield also comprises:
Handle, for moving and carry described detection head.
8. a Raman spectra detection process, is characterized in that, utilizes the Raman spectrum detection head as described in any one in claim 1 to 7 to carry out Raman spectrum detection, comprising:
Launch linear laser by laser line light source;
Utilize filtration optical filter to filter the Rayleigh scattering light in described linear laser, residue Raman diffused light;
Utilize beam splitting optical filter to reflex to scanning mirror the Raman diffused light after filtering;
The mode of utilizing scanning mirror to pass through double vibrations reflects described Raman diffused light, obtains uniform wire Raman diffused light, and the slit outgoing that uniform wire Raman diffused light is passed through to light shield is to sample surfaces;
Make uniform wire Raman diffused light be radiated at the flashlight of Raman detection that sample surfaces produces and be incident to scanning mirror by slit, utilize scanning mirror reflect described flashlight after beam splitting optical filter by the detection mirror outgoing on light shield.
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| CN104390952A (en) * | 2014-12-15 | 2015-03-04 | 中国科学院重庆绿色智能技术研究院 | Linear focus Raman scattering probe |
| CN106706597A (en) * | 2017-01-10 | 2017-05-24 | 上海理工大学 | Device and method for detecting platelet-derived growth factor based on raman spectrum |
| CN109073559A (en) * | 2018-01-16 | 2018-12-21 | 深圳达闼科技控股有限公司 | Treat method and terminal that detection substance carries out Raman detection |
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| CN109073559A (en) * | 2018-01-16 | 2018-12-21 | 深圳达闼科技控股有限公司 | Treat method and terminal that detection substance carries out Raman detection |
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