CN107748142A - A kind of dual-beam based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment - Google Patents
A kind of dual-beam based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment Download PDFInfo
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- 230000003287 optical effect Effects 0.000 title claims abstract description 54
- 238000001228 spectrum Methods 0.000 title claims abstract description 40
- 238000005259 measurement Methods 0.000 claims abstract description 70
- 230000003595 spectral effect Effects 0.000 claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 claims abstract description 20
- 238000004611 spectroscopical analysis Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000004446 light reflex Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 6
- 239000003086 colorant Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 26
- 238000004458 analytical method Methods 0.000 description 12
- 238000010183 spectrum analysis Methods 0.000 description 10
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 2
- 239000003708 ampul Substances 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 229910052805 deuterium Inorganic materials 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229920001410 Microfiber Polymers 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
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- G—PHYSICS
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
- G01N2021/3155—Measuring in two spectral ranges, e.g. UV and visible
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Abstract
The present invention discloses a kind of dual-beam based on miniature beam-splitting optical system and becomes light path sample spectra analytical equipment, and it includes light source module, light path selecting module, colorimetric measurement module, light path converting module, grating beam splitting module and spectrum data gathering module；Colorimetric measurement module includes mutually isolated Measurement channel and reference channel, and Measurement channel is provided with the first thang-kng pipeline and measuring cell, and reference channel is provided with the second thang-kng pipeline and reference cell；First thang-kng pipeline and the second thang-kng pipeline are respectively protruding into measuring cell and reference cell, and thang-kng spacing is left between the end and pool wall；Displacement drive mechanism can drive the first thang-kng pipeline and the second thang-kng pipeline along itself axial displacement, to change the size of the thang-kng spacing；Light source module provides measurement light source for colorimetric module, and the complex light of grating beam splitting module contrastive colours module outgoing is divided, the monochromatic light ray modal data after the collection light splitting of spectrum data gathering module, and exports.Present invention measurement light path is adjustable, is suitable for the spectral measurement requirement of various concentrations sample, while the design of double light path can improve measurement accuracy.
Description
Technical field
The present invention relates to the field of spectral analysis technology in Water quality detected, particularly one kind to be based on miniature Dichroic Optical
The dual-beam of system becomes light path sample spectra analytical equipment.
Background technology
With current aquatic environment contamination phenomenon getting worse, monitoring of the country to water environment is increasingly strict, and is related to water
Every profession and trade need often test water quality, to grasp the indices of water quality in time, can be monitored in time in water quality deterioration
To take measures rapidly, to improve water quality, avoid influenceing the utilization of water because of water quality deterioration.Water quality on-line automatic analyzer device can
Easily analyzed in various water quality Site Detections, meet modern water quality monitoring in real time, fast and accurately demand, obtained more next
More it is widely applied.But the LED of generally use Single wavelength launches in photoelectric colorimetry water quality on-line automatic analyzer device at present
Device measures analysis with receiver to the sample by sample cell, and its measurement wavelength is single, can not carry out spectrum point to sample
Analysis, so as to limit the versatility of colorimetric measuring device, the measurement of multiple-quality water parameter can not be applied to.Other LED light source is deposited
In certain breadth of spectrum line, its emission spectrum is actually the bands of a spectrum of a narrow-band, and this can cause to introduce in optical measurement non-
The interference of characteristic spectral line, reduce Optical Measurement Precision.In addition, generally by quartz ampoule or the specification chi of cuvette in analytical instrument
It is very little to define measurement light path, light path can not be measured according to the adaptive adjustment of sample characteristics of for example, it is necessary to according to sample characteristics of for example frequently more
The quartz ampoule or cuvette of different size are changed, inconvenient for use, measuring range is also limited by certain.With spectral measurement skill
The development of art, there is the water quality on-line automatic analyzer device that spectral measurement is carried out using micro fiber spectrometer, concrete application
In need to use optical fiber connection spectrometer it is relatively low with transmitting beam, its reliability.
Disclosed in Chinese patent CN201510106716.4 one kind disappear astigmatism wide spectrum detection grating spectrograph, by
A piece of tire lens and a piece of grade optical filter that disappears are added on the basis of Czerny-Turner structures, solve astigmatism and wide spectrum
In the range of existing different diffraction series spectra overlapping the problem of, but it only has miniature beam-splitting optical system, and light splitting can be achieved
Function, and colorimetric measurement system is not equipped with, measurement light path adjustable function can not be realized；Disclosed in Chinese patent CN95216453.1
A kind of UV detector of on-line measurement, include sample introduction and analyzer part, electricity part, opticator and anti-
Quick-fried box part, but its is complicated, and its sample introduction part included can limit the monitoring parameters of water quality online analyzer device significantly；
A kind of single beam ultraviolet-visible spectrophotometer is disclosed in Chinese patent CN200710041895.3, its design to filter disc
Position is improved, but the photometer includes the parts such as light source, monochromator, four frame linkings, lamp room component and receiver, its volume
Weight is larger, is designed towards laboratory applications, and anti-seismic performance is poor, high to operating environment requirements, is not suitable for
In line analysis instrument, the measurement light path that four frame linkings limit cuvette is employed in addition；Chinese patent CN200920175466.X
In disclose a kind of portable spectrophotometer, its upper surface of shell body be provided with One function it is powerful built in it is multi-functional
Cuvette room, facilitates portable, and available for water quality on-line analysis scene, but it is mainly by inserting the cuvette of different size with reality
The regulation of light path is now measured, can not be automatically adjusted.A kind of variable light path is disclosed in Chinese patent CN200820151779.7
Colorimetric device, but it equally need to change measurement light path by changing the flow cell of different light paths, can not automatically adjust.
The content of the invention
It is an object of the invention to provide a kind of dual-beam based on miniature beam-splitting optical system to become the analysis of light path sample spectra
Device, its measurement light path is adjustable, is suitable for the spectral measurement requirement of various concentrations sample, can easily integrate and be applied to water quality
In on-line automatic analyzer device, multi-parameter water-quality analysis is carried out, measurement accuracy is higher.
The technical scheme that the present invention takes is：A kind of dual-beam based on miniature beam-splitting optical system becomes light path sample spectra
Analytical equipment, including light source module, light path selecting module, colorimetric measurement module, light path converting module, grating beam splitting module and light
Modal data acquisition module；
Colorimetric measurement module includes mutually isolated Measurement channel and reference channel, Measurement channel be provided with the first thang-kng pipeline and
Measuring cell, reference channel are provided with the second thang-kng pipeline and reference cell；One end of first thang-kng pipeline and the second thang-kng pipeline point
Do not stretch into measuring cell and reference cell, and thang-kng spacing is left between the end and measuring cell and the pool wall of reference cell；First is logical
Light pipe road and the second thang-kng pipeline are also associated with displacement drive mechanism, and displacement drive mechanism can drive the first thang-kng pipeline and second
Thang-kng pipeline is along itself axial displacement, to change the size of the thang-kng spacing；
Light path selecting module includes light source input port, the first light path converting component and 2 parallel optical output ports, wherein light source
Input port receives the light that light source module is sent, and the source light received is converted to 2 beams and put down by the first light path converting component
Row light, exported respectively by described 2 parallel optical output ports；2 parallel optical output ports connect the first thang-kng pipeline respectively
With the second thang-kng pipeline, and the directional light is successively after the thang-kng pipeline of the first thang-kng pipeline/second and the thang-kng spacing, by
The pool wall of measuring cell/reference cell is transmitted and gone out；
Light path converting module includes 2 directional light input ports, the second light path converting component and 1 focus on light beam output port；
Wherein 2 directional light input ports receive Measurement channel and the light of reference channel outgoing, the second light path converting component point respectively
2 beam directional lights are not converted into focus on light beam and exported by focus on light beam output port to spectral module；
Grating beam splitting module is divided to the focus on light beam received, is divided into the monochromatic light of different wave length, is exported to spectrum number
According to acquisition module；Spectrum data gathering module gathers monochromatic spectroscopic data, and exports.
The present invention in use, can be the mixture of sample and reagent in measuring cell, can be in reference cell water, air or
Person does not add the primary sample of any reagent.Reference channel can be used for eliminating the influence of light source drift, aging to sample analysis, also
Spectral measurement directly is carried out to sample using reference channel, other attributes such as sample itself turbidity, colourity are detected, from
And update information is provided to correct the measurement result of optical path.Grating beam splitting module can use existing grating beam splitting optical system
System.Spectrum data gathering module is prior art, and spectrum data gathering module can pre-process to the spectral signal collected,
Such as analog-to-digital conversion process, and then spectroscopic data is transmitted to external data processing systems with digital signal form, utilize existing light
Modal data analytical technology carries out spectrum analysis.
Preferably, the first light path converting component includes collimating mirror, spectroscope and speculum, and collimating mirror receives light source die
The light that block is sent, a branch of directional light is converted to, is emitted to spectroscope, a branch of directional light is divided into two beams and is mutually perpendicular to by spectroscope
Directional light, wherein a branch of parallel light emergence to Measurement channel, another beam directional light reflexes to reference channel by speculum.
Further, the light path selecting module also includes corresponding to Measurement channel and the photoswitch of reference channel, institute respectively
That states photoswitch is turned on and off controlling being turned on and off for 2 parallel optical output ports respectively.So as in application
Selection carries out the spectrum analysis of sample by Measurement channel or reference channel as needed.
Preferably, the second light path converting component includes speculum, spectroscope and focus lamp, and speculum receives reference and led to
The collimated light beam of road outgoing, the light beam is reflexed into spectroscopical light splitting surface, spectroscope receive Measurement channel outgoing light beam and
The light beam of speculum reflection, two light beams are emitted to focus lamp by same path, focus lamp receives the directional light of spectroscope outgoing
Beam, be converted to focus on light beam and be emitted.
Preferably, thang-kng of thang-kng path of the light in the first thang-kng pipeline parallel to light in the second thang-kng pipeline
Path.That is, Measurement channel is set parallel to reference channel.
Further, the grating beam splitting module includes light entrance slit, the focus on light beam of light path converting module outgoing
Spectral module is incident to by the light entrance slit.Spectral module by the complex light after entrance slit to being divided.
Preferably, the focus point of the focus on light beam of light path converting component outgoing is located at the light entrance slit.
Preferably, opening is respectively equipped with measuring cell and reference cell, slide rail is provided with opening；First thang-kng pipeline and second
The gib block that can be slided in slide rail is provided with thang-kng pipeline respectively in axial direction.Displacement drive mechanism can use cylinder, pass through work
Stopper rod stretches, and realizes the displacement drive of the first thang-kng pipeline and the second thang-kng pipeline in axial direction.
Preferably, grating beam splitting module uses staggered form Czerny-Turner optical systems, and it is complete that ultraviolet-visible can be achieved
Spectrum analysis.
Preferably, present invention additionally comprises light source interface, light source module to be detachably electrically connected in the light source interface.Light source
The design of interface can facilitate the replacing of light source module, to select LED, halogen tungsten lamp or deuterium lamp to be used as light source as needed.
Preferably, it is respectively equipped with sample injection tube road interface on the measuring cell and reference cell in colorimetric module of the present invention.Should
Interface can be used for connection sample injection tube road, to be easily integrated in inside water quality automatic on-line analyzer, as optical colorimetric
Module.
Beneficial effect
The dual-beam of the present invention becomes in light path sample spectra analytical equipment, light path selecting module, colorimetric module and light path converting mould
Block constitutes dual-beam and becomes light path colorimetric measurement system, and the measurement result of optical path can be modified using reference light paths,
The displacement drive mechanism in colorimetric module realizes variable measurement light path simultaneously, is suitable for the spectral measurement of various concentrations sample
It is required that.In addition grating splitting system of the present invention is based on staggered form Czerny-Turner Optical System Designs, can carry out UV, visible light
Full spectrum analysis.The present invention can also be by designing pipe interface and modular light source interface, easily to carry out carrying for sample
Take processing and the replacing of light source.The dual-beam of the present invention becomes light path colorimetric measurement, can improve measurement accuracy height, while present invention knot
Structure is compact, compact, reliable and stable, can easily integrate and join applied to carrying out water quality in water quality on-line automatic analyzer device more
Number analysis.
Brief description of the drawings
Fig. 1 show apparatus of the present invention module architectures schematic diagram；
Fig. 2 show apparatus of the present invention structure and working principle schematic diagram.
Embodiment
Further described below in conjunction with the drawings and specific embodiments.
With reference to Fig. 1 and Fig. 2, dual-beam of the present invention based on miniature beam-splitting optical system becomes light path sample spectra analysis dress
Put, including light source module, light path selecting module, colorimetric measurement module, light path converting module, grating beam splitting module and spectroscopic data
Acquisition module；
Colorimetric measurement module includes mutually isolated Measurement channel and reference channel, Measurement channel be provided with the first thang-kng pipeline and
Measuring cell, reference channel are provided with the second thang-kng pipeline and reference cell；One end of first thang-kng pipeline and the second thang-kng pipeline point
Do not stretch into measuring cell and reference cell, and thang-kng spacing is left between the end and measuring cell and the pool wall of reference cell；First is logical
Light pipe road and the second thang-kng pipeline are also associated with displacement drive mechanism, and displacement drive mechanism can drive the first thang-kng pipeline and second
Thang-kng pipeline is along itself axial displacement, to change the size of the thang-kng spacing；
Light path selecting module includes light source input port, the first light path converting component and 2 parallel optical output ports, wherein light source
Input port receives the light that light source module is sent, and the source light received is converted to 2 beams and put down by the first light path converting component
Row light, exported respectively by described 2 parallel optical output ports；2 parallel optical output ports connect the first thang-kng pipeline respectively
With the second thang-kng pipeline, and the directional light is successively after the thang-kng pipeline of the first thang-kng pipeline/second and the thang-kng spacing, by
The pool wall of measuring cell/reference cell is transmitted and gone out；
Light path converting module includes 2 directional light input ports, the second light path converting component and 1 focus on light beam output port；
Wherein 2 directional light input ports receive Measurement channel and the light of reference channel outgoing, the second light path converting component point respectively
2 beam directional lights are not converted into focus on light beam and exported by focus on light beam output port to spectral module；
Grating beam splitting module is divided to the focus on light beam received, is divided into the monochromatic light of different wave length, is exported to spectrum number
According to acquisition module；Spectrum data gathering module gathers monochromatic spectroscopic data, and exports.
Embodiment 1
The present invention can be water, air or not in reference cell in use, can be the mixture of sample and reagent in measuring cell
Add the primary sample of any reagent.Reference channel can be used for eliminating the influence of light source drift, aging to sample analysis, can also profit
Spectral measurement directly is carried out to sample with reference channel, other attributes such as sample itself turbidity, colourity detected, so as to carry
For update information to correct the measurement result of optical path.Grating beam splitting module can use existing grating beam splitting optical system.Light
Modal data acquisition module is prior art, and spectrum data gathering module can pre-process to the spectral signal collected, such as mould
Number conversion process, and then spectroscopic data is transmitted to external data processing systems with digital signal form, utilize existing spectrum number
Spectrum analysis is carried out according to analytical technology.
Embodiment as shown in Figure 2, light path selecting module also includes corresponding to Measurement channel respectively and the light of reference channel is opened
Close, the photoswitch is turned on and off controlling being turned on and off for 2 parallel optical output ports respectively.So as to answer
The spectrum analysis that used time, selection passed through Measurement channel or reference channel progress sample as needed.
The first light path converting component in light path selecting module includes collimating mirror, spectroscope and speculum, and collimating mirror receives
The light that light source module is sent, a branch of directional light is converted to, is emitted to spectroscope, a branch of directional light is divided into two beam phases by spectroscope
Mutually vertical directional light, wherein a branch of parallel light emergence to Measurement channel, another beam directional light reflexes to reference by speculum and led to
Road.
The second light path converting component in light path converting module includes speculum, spectroscope and focus lamp, and speculum receives
The collimated light beam of reference channel outgoing, the light beam is reflexed into spectroscopical light splitting surface, spectroscope receives Measurement channel outgoing
Light beam and the light beam of speculum reflection, two light beams are emitted to focus lamp by same path, focus lamp receives spectroscope outgoing
Collimated light beam, be converted to focus on light beam and be emitted.
Thang-kng path of thang-kng path of the light in the first thang-kng pipeline parallel to light in the second thang-kng pipeline.
That is, Measurement channel is set parallel to reference channel.Opening is respectively equipped with measuring cell and reference cell, slide rail is provided with opening；The
The gib block that can be slided in slide rail is provided with one thang-kng pipeline and the second thang-kng pipeline respectively in axial direction.Displacement drive mechanism can
Using cylinder, by the flexible of piston rod, the displacement drive of the first thang-kng pipeline and the second thang-kng pipeline in axial direction is realized, and the
The displacement of one thang-kng pipeline and the second thang-kng pipeline is synchronous so that the data of reference channel have more referential.
With reference to figure 2, grating beam splitting module includes light entrance slit, and the focus on light beam of light path converting module outgoing passes through institute
State light entrance slit and be incident to spectral module.Spectral module by the complex light after entrance slit to being divided.Light path turns
The focus point for changing the focus on light beam of component outgoing is located at the light entrance slit.
Embodiment as shown in Figure 2, grating beam splitting module use staggered form Czerny-Turner optical systems, can be achieved
The full spectrum analysis of ultraviolet-visible.Grating beam splitting module includes three optical mirror slips, realizes that by complex light be respectively different wave length
Monochromatic light, by collection of the spectrum data gathering modular circuit to each monochromatic light ray modal data.
Further, present invention additionally comprises light source interface, light source module to be detachably electrically connected in the light source interface.Light
The design of source interface can facilitate the replacing of light source module, to select LED, halogen tungsten lamp or deuterium lamp to be used as light source as needed.
Further, sample injection tube road is respectively equipped with the measuring cell and reference cell in colorimetric module of the present invention to connect
Mouthful.The interface can be used for connection sample injection tube road, to be easily integrated in inside water quality automatic on-line analyzer, as optics
Colorimetric module.
Embodiment 2
With reference to Fig. 1 and Fig. 2, analytical equipment of the present invention mainly becomes light path colorimetric measurement system 1 and miniature Dichroic Optical by dual-beam
The two parts of system 2 form.Dual-beam becomes light path colorimetric measurement system 1 by light path selecting module 3, measuring cell 4, reference cell 5, displacement
Mechanism 6 and the grade of light path converting module 7 part composition, by the incident light of light source module 8 by entering measurement after light path selecting module 3
Pond 4 and reference cell 5, displacement mechanism 6 are that measuring cell 4 and reference cell 5 provide variable measurement light path, light path converting module 7 to by
The light that measuring cell 4 or reference cell 5 are emitted is changed, and the incidence of miniature beam-splitting optical system 2 is incident in the form of focus on light beam
At slit.Miniature beam-splitting optical system 2 is made up of grating beam splitting module 9 and spectrum data gathering module 10, grating beam splitting module 9
Realize by complex light be respectively different wave length monochromatic light, spectrum data gathering module 10 carries out spectroscopic data to these monochromatic light
Collection and processing, and export into external data processing systems 11.
The operation principle schematic diagram of analytical equipment of the present invention is as shown in Figure 2.Colorimetric measurement system uses double light path optical system
System, it is divided into optical path and reference light paths after light path selector 3 by the incident light of light source module 8, optical path is via sample
Measuring cell 4 enters miniature beam-splitting optical system 2 and carries out spectrum analysis, is sample, the mixture of reagent in measuring cell 4；Reference light
Road enters miniature beam-splitting optical system 2 via sample reference cell 5 and carries out spectrum analysis, can be water, air in reference cell 5,
It can be the primary sample for not adding any reagent.Reference light paths can be used for eliminating light source drift, aging to the shadow of sample analysis
Ring, and available for directly spectral measurement is carried out to sample, so that other attributes such as sample itself turbidity, colourity are detected and carried
For update information to correct the measurement result of optical path.Measuring cell 4 is provided variable measurement by displacement mechanism 6 with reference cell 5
Light path OPL, to adapt to the spectral measurement requirement of various concentrations sample.Sample injection is also devised with measuring cell 4 and reference cell 5
Pipe interface so that analytical equipment of the present invention can use as independent analytical instrument, can also conveniently be integrated into water
Inside matter automatic on-line analyzer, as sample optical colorimetric module.The light being emitted by measuring cell 4 or reference cell 5 passes through light path
Modular converter 7 is changed, and is incident at the entrance slit of grating beam splitting module, and grating beam splitting module is based on staggered form
Czerny-Turner system designs, incident light can be resolved into the monochromatic light exposure of different wave length to CCD device, pass through CCD
The corresponding relation of pixel and wavelength can obtain the spectral information of required incident light.The CCD device can be light of the present invention
Modal data acquisition module.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of dual-beam based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment, it is characterized in that, including light
Source module, light path selecting module, colorimetric measurement module, light path converting module, grating beam splitting module and spectrum data gathering module；
Colorimetric measurement module includes mutually isolated Measurement channel and reference channel, Measurement channel be provided with the first thang-kng pipeline and
Measuring cell, reference channel are provided with the second thang-kng pipeline and reference cell；One end of first thang-kng pipeline and the second thang-kng pipeline point
Do not stretch into measuring cell and reference cell, and thang-kng spacing is left between the end and measuring cell and the pool wall of reference cell；First is logical
Light pipe road and the second thang-kng pipeline are also associated with displacement drive mechanism, and displacement drive mechanism can drive the first thang-kng pipeline and second
Thang-kng pipeline is along itself axial displacement, to change the size of the thang-kng spacing；
Light path selecting module includes light source input port, the first light path converting component and 2 parallel optical output ports, wherein light source
Input port receives the light that light source module is sent, and the source light received is converted to 2 beams and put down by the first light path converting component
Row light, exported respectively by described 2 parallel optical output ports；2 parallel optical output ports connect the first thang-kng pipeline respectively
With the second thang-kng pipeline, and the directional light is successively after the thang-kng pipeline of the first thang-kng pipeline/second and the thang-kng spacing, by
The pool wall of measuring cell/reference cell is transmitted and gone out；
Light path converting module includes 2 directional light input ports, the second light path converting component and 1 focus on light beam output port；
Wherein 2 directional light input ports receive Measurement channel and the light of reference channel outgoing, the second light path converting component point respectively
2 beam directional lights are not converted into focus on light beam and exported by focus on light beam output port to spectral module；
Grating beam splitting module is divided to the focus on light beam received, is divided into the monochromatic light of different wave length, is exported to spectrum number
According to acquisition module；Spectrum data gathering module gathers monochromatic spectroscopic data, and exports.
2. the dual-beam according to claim 1 based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment,
It is characterized in that the first light path converting component includes collimating mirror, spectroscope and speculum, collimating mirror receives light source module and sent
Light, be converted to a branch of directional light, be emitted to spectroscope, it is orthogonal parallel that a branch of directional light is divided into two beams by spectroscope
Light, wherein a branch of parallel light emergence to Measurement channel, another beam directional light reflexes to reference channel by speculum.
3. the dual-beam according to claim 1 based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment,
It is characterized in that the light path selecting module also includes corresponding to Measurement channel and the photoswitch of reference channel, the photoswitch respectively
Be turned on and off can control being turned on and off for 2 parallel optical output ports respectively.
4. the dual-beam according to claim 1 based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment,
It is characterized in that the second light path converting component includes speculum, spectroscope and focus lamp, speculum receives reference channel outgoing
Collimated light beam, the light beam is reflexed into spectroscopical light splitting surface, spectroscope receives the light beam and speculum of Measurement channel outgoing
The light beam of reflection, two light beams are emitted to focus lamp by same path, focus lamp receives the collimated light beam of spectroscope outgoing, conversion
For focus on light beam and it is emitted.
5. the dual-beam according to claim 1 based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment,
It is characterized in that thang-kng path of thang-kng path of the light in the first thang-kng pipeline parallel to light in the second thang-kng pipeline.
6. the dual-beam according to claim 1 based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment,
It is characterized in that the grating beam splitting module includes light entrance slit, the focus on light beam that light path converting module is emitted passes through described
Light entrance slit is incident to spectral module.
7. the dual-beam according to claim 6 based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment,
It is characterized in that the focus point of the focus on light beam of light path converting component outgoing is located at the light entrance slit.
8. the dual-beam according to claim 1 based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment,
It is characterized in that grating beam splitting module uses Czerny-Turner optical systems.
9. the dual-beam according to claim 1 based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment,
It is characterized in that in addition to light source interface, light source module be detachably electrically connected in the light source interface.
10. the dual-beam according to claim 1 based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment,
It is characterized in that it is respectively equipped with sample injection tube road interface on measuring cell and reference cell in colorimetric module.
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