CN101793678B - Spectrum measuring device and method of scattering substance of sample cell with isosceles triangle cross section - Google Patents
Spectrum measuring device and method of scattering substance of sample cell with isosceles triangle cross section Download PDFInfo
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- CN101793678B CN101793678B CN2010101117086A CN201010111708A CN101793678B CN 101793678 B CN101793678 B CN 101793678B CN 2010101117086 A CN2010101117086 A CN 2010101117086A CN 201010111708 A CN201010111708 A CN 201010111708A CN 101793678 B CN101793678 B CN 101793678B
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Abstract
The invention discloses spectrum measuring device and method of a scattering substance of a sample cell with an isosceles triangle cross section. The measuring device comprises a sample cell, a light source and an emergent light detector, wherein the sample cell has a cross section of an isosceles triangle; both the incident position of the light source and the position of an emergent light detector are movable; and a light path formed by the sample cell, the light source and the light-emergent detector is changeable. Meanwhile, the invention also discloses a spectrum measuring method of the scattering substance of the sample cell with the isosceles triangle cross section which realizes the measurement on mutually-uncorrelated non-linear spectrums with multiple pathlength by horizontally and/or vertically moving the incident position of the light source and the position of the emergent light detector and changing the relative positions of the light source, the emergent light detector and the sample cell to form the change of the light path, thereby obtaining a distributed uncorrelated non-linear spectrum information of a substance to be measured. The invention can ensure that the analyzing precision of the component content of the substance to be measured is improved.
Description
Technical field
The present invention relates to a kind of spectroscopic analysis system, especially relate to a kind of scatterer spectral measurement device and method that is used for the isosceles square xsect sample cell of muddy scatterer constituent analysis.
Background technology
Spectral analysis is one of important means of the research structure of matter, mainly comprises infrared spectrum, Raman spectrum, fluorescence spectrum, ultraviolet-visible absorption spectroscopy, near infrared spectrum, and the mutually combining of various dynamic spectrum and other means.Wherein, near infrared spectrum soon, does not destroy characteristics such as sample, simple to operate, good stability, efficient height with its speed, has been widely used in every field.Because the continuous development of various science and technology such as optics, microcomputer data processing, chemical luminosity theory and method, spectroscopic analysis methods has been applied in fields such as pharmacy, tobacco, food, polymkeric substance, textile, paint, coal and petroleum industry, the composition of measuring is also more and more, and measuring accuracy is also more and more higher.
The non-linear introducing that many optical lengths spectral measurement method causes the material scattering, utilize the equivalent absorption coefficient difference of the sample of different optical lengths, the mutual incoherent spectrum nonlinear characteristic of spectrum that different optical lengths record, use many optical lengths spectrum to participate in modeling simultaneously in theory the more information of multisample component content can be provided, can obtain more excellent model performance than the modeling of single optical length spectrum.
In the conventional spectral analysis, mainly there is the problem of following three aspects:
When 1, the application of spectral method detected micro constitutent, the selection of optical length was extremely important.Needs according to heterogeneity is analyzed often will adopt different optical lengths.For realizing that spectrometer need be equipped with multiple optical length sample cell traditionally to the detection of the different optical length spectrum of sample.
2, use existing square, when spectral measurement is carried out in the circular sample pond because the amount of sample is limited, the sample cell of use can not be desirable unlimited radius, the influence that the sample cell sidewall causes measurement also is difficult for estimating.
3, in existing spectral measurement, the normal optical fiber that adopts carries out point-to-point spectral information collection, and the incidence point of light source and the acceptance point of emergent light are changeless, can only gather fixedly light path and fixed position spectral information, can not obtain the spectral distribution with position and change in optical path length.
Summary of the invention
At above-mentioned prior art, the invention provides the scatterer spectral measurement device and the method for the isosceles square xsect sample cell of a kind of scattering properties that can make full use of material and many light paths spectral technique, need not to be equipped with a plurality of different optical length sample cells, do not need receiving transducer to contact detected material yet, avoid general square, influence that circular sample pond sidewall causes measurement simultaneously, and can reduce the sample size of half.Utilize the change of sample cell of the present invention and light source and detecting device relative position and the optical path change of bringing, obtain the distributed incoherent nonlinear optical spectrum information of measured matter, thereby detected material component concentration analysis precision is improved.
In order to solve the problems of the technologies described above, the technical scheme that the scatterer spectral measurement device of isosceles square xsect sample cell of the present invention is achieved is: this measurement mechanism comprises sample cell, light source and emergent light detecting device, described sample cell is a sample cell that xsect is the isosceles square, the position of the incoming position of described light source and emergent light detecting device all is movably, and the light path that is formed by described sample cell, light source and emergent light detecting device changes.
The scatterer spectral measurement device of isosceles square xsect sample cell of the present invention, wherein, the base seal of described sample cell, the top is open; In three sides of described sample cell, one side is the plane of reflection, and other two sides are the transmission optics plane; Or in three sides of described sample cell, the two sides is the plane of reflection, and the 3rd side is the transmission optics plane.The material of described sample cell is quartz, glass, resin or plastics.Described emergent light detecting device is spectrometer or optical spectrum imaging device; The wave band of described spectrometer or optical spectrum imaging device response comprise ultraviolet, visible, infrared in the combination of one or more wave bands, directly receive emergent light or through fiber optic conduction.
The scatterer spectral measurement method of a kind of isosceles square of the present invention xsect sample cell, by the incoming position of described light source and the position of emergent light detecting device are carried out moving of horizontal direction and/or vertical direction, form the variation of light path by the change of light source, emergent light detecting device and described sample cell relative position, realize the mutual incoherent nonlinear optical spectrometry of many optical lengths, thereby obtain the distributed incoherent nonlinear optical spectrum information of measured matter.
The scatterer spectral measurement method of isosceles square xsect sample cell of the present invention, wherein, described light source direct irradiation sample cell.Described light source imports sample cell through the optical fiber importing or through slit or aperture.
Compared with prior art, the invention has the beneficial effects as follows:
Xsect is that the advantage of the special-shaped sample cell of isosceles right triangle is among the present invention: do not need to need traditionally to be equipped with a plurality of different optical length sample cells, do not need receiving transducer to contact detected material yet, avoid general square, influence that circular sample pond sidewall causes measurement simultaneously, and can reduce the sample size of half.
Because to adopt xsect is the sample cell of isosceles square in the present invention, and movably light source incoming position and emergent light receiving position, the emergent light detecting device is spectrometer or light spectrum image-forming equipment.Utilize the change of this sample cell and light source and detecting device relative position and the optical path change of bringing, obtain the distributed incoherent nonlinear optical spectrum information of measured matter, detected material component concentration analysis precision is improved.
Description of drawings
Fig. 1 uses usually square or rectangle cross-sectional sample pond to carry out the measurement of spectrum in the prior art;
It is that the special-shaped sample cell of isosceles right triangle carries out spectral distribution and measures that Fig. 2 is to use cross section of the present invention;
Fig. 3 is that a kind of xsect is the special-shaped sample cell synoptic diagram of isosceles right triangle in the measurement mechanism of the present invention;
Fig. 4 is that another kind of xsect is the special-shaped sample cell synoptic diagram of isosceles right triangle in the measurement mechanism of the present invention;
Fig. 5 is the structural representation of spectral measurement device of the present invention;
Fig. 6 is the workflow synoptic diagram of spectral measurement method of the present invention;
Among the figure: the 1st, incident light source, the 2nd, special-shaped sample cell, the 3rd, emergent light detecting device (or fibre-optical probe).
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in further detail.
The scatterer spectral measurement device of isosceles square xsect sample cell of the present invention, as shown in Figure 6, comprise the sample cell 2 that an xsect is the isosceles square, light source 1 and emergent light detecting device 3, the position of the incoming position of this light source 1 and emergent light detecting device is movably, the position of the incoming position of light source and emergent light receiving trap can be carried out moving of horizontal direction and/or vertical direction respectively, emergent light is received by the emergent light detecting device, and this emergent light detecting device is spectrometer or light spectrum image-forming equipment.Utilize sample cell 2 and light source 1 and the change of emergent light detecting device 3 relative positions and the optical path change of bringing, obtain the distributed incoherent nonlinear optical spectrum information of measured matter, detected material component concentration analysis precision is improved.
As shown in Figure 1, owing to, only sample is carried out the measurement of single optical length spectrum in the centre if use general square cross section sample cell in the prior art.Therefore among the present invention, as shown in Figure 2, adopting xsect is the special-shaped sample cell of the band mirrored sides of isosceles right triangle, and the spectral distribution that only need gather a side can obtain distributed, the different light path spectrum of substances to be measured.
Two kinds of xsects among the present invention be isosceles right triangle special-shaped sample cell cross section as shown in Figure 3 and Figure 4, base seal, the top is open, in three sides, one side is the plane of reflection, and other two sides are the transmission optics plane, perhaps the two sides is the plane of reflection, and the 3rd side is the transmission optics plane.The material of abnormity sample cell can be light transmissive materials such as quartz, glass, resin or plastics according to the needs of different measuring.
Among the present invention, xsect is that the advantage of the special-shaped sample cell of isosceles right triangle is: do not need to need traditionally to be equipped with a plurality of different optical length sample cells, do not need receiving transducer to contact detected material yet, avoid general square or influence that circular sample pond sidewall causes measurement in the prior art simultaneously, and can reduce the sample size of half.
Utilize the measuring method of the scatterer spectral measurement device of isosceles square xsect sample cell of the present invention to be, utilize the movably position of light source incoming position and emergent light detecting device (being used for the reception of emergent light), the incoming position of light source and the position of emergent light receiving trap are carried out moving of horizontal direction and vertical direction respectively, form the variation of light path by the change of light source, emergent light detecting device and described sample cell relative position, thereby realize the detection of the distributed spectrum of scatterer.Movably light source and detecting device match with special-shaped sample cell, realize the mutual incoherent nonlinear optical spectrometry of many optical lengths, and obtain the distribution of spectrum, thereby more fully obtain the distributed incoherent nonlinear optical spectrum information of measured matter, pass through modeling and prediction and carry out the material composition analysis and lay the foundation for follow-up.
But used light source direct irradiation sample cell perhaps imports through optical fiber, perhaps imports sample cell through slit or aperture.The emergent light detecting device is spectrometer or optical spectrum imaging device, the wave band of response comprise ultraviolet, visible, infrared in the combination of one or more wave bands, directly receive or through fiber optic conduction.
As shown in Figure 5 and Figure 6, movably incident light source 1, but direct irradiation opposite sex sample cell 2 perhaps through the optical fiber importing, perhaps imports through slit or aperture.Abnormity sample cell 2 is the sample cell of the band mirrored sides of isosceles right triangle for xsect, base seal, the top is open, can be as shown in Figure 5, in three sides, one side is the plane of reflection, other two sides are the transmission optics plane, also can be as shown in Figure 6, in three sides, the two sides is the plane of reflection, and the 3rd side is the transmission optics plane.The material of abnormity sample cell can be quartz, glass, resin or plastics according to the needs of different measuring.Movably emergent light detecting device 3 is spectrometer or light spectrum image-forming equipment.The wave band of response comprise ultraviolet, visible, infrared in the combination of one or more wave bands, directly receive or through fiber optic conduction.The present invention utilizes sample cell and the change of light source and detecting device relative position and the optical path change of bringing, and obtains the distributed incoherent nonlinear optical spectrum information of measured matter, and detected material component concentration analysis precision is improved.
As shown in Figure 5, light source 1 is by movably optical fiber importing, a transmissive side surfaces incident from the special-shaped sample cell 2 that adds tested scatterer, this abnormity sample cell xsect is an isosceles right triangle, in three sides, one side is the plane of reflection, and other two sides are the transmission optics plane, emergent light is reached spectrometer and is received by movably fibre-optical probe 3 derivation.In the measuring process, incident light from reference position to final position successively straight line move, whenever stop to move after moving to the incoming position of a setting, straight line moves the outgoing fibre-optical probe and scans from reference position to final position then, obtain the distribution of the outgoing spectrum of this incident light position, incident light position stops to move after moving to next setting incoming position then, straight line moves the outgoing fibre-optical probe and scans from reference position to final position once more, obtain the distribution of the outgoing spectrum of this incident light position, so circulation is until the outgoing spectrum distribution measuring of finishing the incident light final position.
Embodiment 2
As shown in Figure 6, light source 1 is imported by slit movably, from the center line one side incident of the transmissive side surfaces of the special-shaped sample cell 2 that adds tested scatterer, this abnormity sample cell xsect is an isosceles right triangle, in three sides, the two sides is the plane of reflection, and the 3rd side is the transmission optics plane.Emergent light is detected and is gathered by light spectrum image-forming equipment 3 movably.In the measuring process, incident light from reference position to final position successively straight line move, whenever stop to move after moving to the incoming position of a setting, scan by light spectrum image-forming equipment then, obtain the outgoing spectral distribution of this incident light position, incident light position stops to move after moving to next setting incoming position then, scan by light spectrum image-forming equipment once more, obtain the outgoing spectral distribution of this incident light position, so circulation is until the measurement of the outgoing spectral distribution of finishing the incident light final position.
Although top invention has been described in conjunction with figure; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; under the situation that does not break away from aim of the present invention, can also make a lot of distortion, these all belong within the protection of the present invention.
Claims (6)
1. scatterer spectral measurement device that uses isosceles right triangle xsect sample cell, comprise sample cell, light source and emergent light detecting device, it is characterized in that: described sample cell is a sample cell that xsect is an isosceles right triangle, the base seal of described sample cell, the top is open; In three sides of described sample cell: one side is the plane of reflection, and other two sides are the transmission optics plane, or the two sides is the plane of reflection, and the 3rd side is the transmission optics plane; The position of the incoming position of described light source and emergent light detecting device all is movably, and the light path that is formed by described sample cell, light source and emergent light detecting device changes.
2. the scatterer spectral measurement device of use isosceles right triangle xsect sample cell according to claim 1 is characterized in that: the material of described sample cell is quartz, glass, resin or plastics.
3. the scatterer spectral measurement device of use isosceles right triangle xsect sample cell according to claim 1 is characterized in that: described emergent light detecting device is spectrometer or optical spectrum imaging device; The wave band of described spectrometer or optical spectrum imaging device response comprise ultraviolet, visible, infrared in the combination of one or more wave bands, directly receive emergent light or through fiber optic conduction.
4. scatterer spectral measurement method that uses isosceles right triangle xsect sample cell, it is characterized in that: adopt measurement mechanism as claimed in claim 1 to measure, by the incoming position of described light source and the position of emergent light detecting device are carried out moving of horizontal direction and/or vertical direction, form the variation of light path by the change of light source, emergent light detecting device and described sample cell relative position, realize the mutual incoherent nonlinear optical spectrometry of many optical lengths, thereby obtain the distributed incoherent nonlinear optical spectrum information of measured matter.
5. the scatterer spectral measurement method of use isosceles right triangle xsect sample cell according to claim 4 is characterized in that: described light source direct irradiation sample cell.
6. the scatterer spectral measurement method of use isosceles right triangle xsect sample cell according to claim 4 is characterized in that: described light source imports sample cell through the optical fiber importing or through slit or aperture.
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| CN107421902A (en) * | 2017-07-02 | 2017-12-01 | 天津大学 | The method of double light path and multiposition transmitted spectrum measurement free hemoglobin contents |
| CN107421927A (en) * | 2017-07-02 | 2017-12-01 | 天津大学 | Multiposition modulation transmission and the method for fluorescence excitation light source measurement complicated solution composition |
| CN107421920A (en) * | 2017-07-02 | 2017-12-01 | 天津大学 | The method of double light path and multiposition fluorescence spectral measuring free hemoglobin contents |
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