CN109187428A - spectrometer and water quality detecting device - Google Patents

spectrometer and water quality detecting device Download PDF

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Publication number
CN109187428A
CN109187428A CN201811256076.5A CN201811256076A CN109187428A CN 109187428 A CN109187428 A CN 109187428A CN 201811256076 A CN201811256076 A CN 201811256076A CN 109187428 A CN109187428 A CN 109187428A
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China
Prior art keywords
light beam
mirror
grating
light
spectrometer
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王翰林
付秋玥
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YIWEN ENVIRONMENTAL SCIENCE TECHNOLOGY Co Ltd
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YIWEN ENVIRONMENTAL SCIENCE TECHNOLOGY Co Ltd
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Priority to CN201811256076.5A priority Critical patent/CN109187428A/en
Publication of CN109187428A publication Critical patent/CN109187428A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/39Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The present invention relates to a kind of spectrometer and a kind of water quality detecting devices, above-mentioned spectrometer includes: shell, first collimating mirror, first grating, second collimating mirror, second grating, imaging mirror and detector array, first collimating mirror, first grating, second collimating mirror and second grating are mounted on to adjustable angle in the shell respectively, the shell is equipped with the second optical entrance for the first optical entrance of the first light beam incidence and for the incidence of the second light beam, first collimating mirror, first grating and the imaging mirror are set gradually along the optical path of first light beam, so that first light beam forms the first spectrum on the detector array;Second collimating mirror, second grating and the imaging mirror are set gradually along the optical path of second light beam, so that second light beam forms the second spectrum on the detector array, above-mentioned spectrometer the separation of each spectrogram effectively will can be formed by each road beam detection and production cost is low, above-mentioned water quality detecting device Detection accuracy with higher and lower production costs.

Description

Spectrometer and water quality detecting device
Technical field
The present invention relates to optical devices technologies fields, more particularly to a kind of spectrometer and a kind of water quality detecting device.
Background technique
Currently, spectrometer can be divided into single channel spectrometer and double-channel spectrometer, single channel spectrometer every time can only be to list Road light beam is detected, and if you need to detect two-way light beam, then needs separately to carry out twice, this causes single channel spectrometer to every The contrasting detection of road light beam is easy to appear error, and double-channel spectrometer can then overcome the drawbacks described above of single channel spectrometer, but Traditional double-channel spectrometer is formed by each spectrogram to each road beam detection and is easy to happen coincidence, and it is accurately right to cause to be difficult to Each spectrogram compares and analyzes, and is separated from each other each spectrogram for this purpose, traditional double-channel spectrometer needs to be arranged cylindrical mirror, Clearly each spectrogram could be compared and analyzed, but this undoubtedly will lead to the production cost of traditional double-channel spectrometer compared with It is high.
Summary of the invention
Based on this, it is necessary to for traditional double-channel spectrometer high production cost the technical issues of, a kind of light is provided Spectrometer and a kind of water quality detecting device.Above-mentioned spectrometer can simultaneously detect at least two-way light beam, and effectively will be to each road Beam detection is formed by each spectrogram separation, so as to clearly compare and analyze to each spectrogram, effectively improves measurement As a result accuracy, and the lower production costs of above-mentioned spectrometer;Above-mentioned water quality detecting device Detection accuracy with higher And lower production costs.
To achieve the above object, the present invention provides a kind of spectrometer, the spectrometer include: shell, the first collimating mirror, First grating, the second collimating mirror, the second grating, imaging mirror and detector array, first collimating mirror, first light Grid, second collimating mirror and second grating are mounted on to adjustable angle in the shell respectively, and the shell is equipped with The first optical entrance for the incidence of the first light beam and the second optical entrance for the incidence of the second light beam, first collimation Mirror, first grating and the imaging mirror are set gradually along the optical path of first light beam, so that first light beam The first spectrum is formed on the detector array;Second collimating mirror, second grating and the imaging mirror edge The optical path of second light beam is set gradually, so that second light beam forms the second spectrum on the detector array.
Above-mentioned spectrometer compared with the background art, at least has the advantages that the first light beam from the first optical entrance Into in shell, the first optical path successively is formed by the first collimating mirror, the first grating and imaging mirror later, finally in array The first spectrum is formed on detector;Second light beam enters in shell from the second optical entrance, later successively by the second collimating mirror, Second grating and imaging mirror form the second optical path, and the second spectrum is finally formed on detector array;First optical path and Two optical paths are separated from each other, so that the first optical path and the second optical path be made not to interfere, while by adjusting the first collimating mirror, the The angle of one grating, the second collimating mirror and the second grating is, it can be achieved that the first spectrum and the second spectrum are kept completely separate, so that the first light There is no crosstalk between spectrum and the second spectrum, so as to clearly be compared and analyzed to the first spectrum and the second spectrum, effectively mentions The accuracy of high measurement result;Furthermore above-mentioned spectrometer can separate the first spectrum and the second spectrum without the use of cylindrical mirror, Effectively save above-mentioned spectrometer production cost.
In one embodiment, first collimating mirror and second collimating mirror in the imaging mirror to hang down Face is that symmetrical centre symmetrically arranges that first grating is with the middle vertical plane of the imaging mirror with second grating Symmetrical centre is symmetrically arranged.Above-mentioned setting is more convenient for by adjusting the first collimating mirror, the first grating, the second collimating mirror and the The angle of two gratings is kept completely separate the first spectrum and the second spectrum.
In one embodiment, slit sheet is installed respectively in first optical entrance and second optical entrance. It can be by changing the slit width of slit sheet so that the resolution ratio for being formed by the first spectrum and the second spectrum reaches necessary requirement.
In one embodiment, the detector array, which is equipped with, is used for first spectrum and second spectrum The light barrier of separation.Above-mentioned light barrier avoids crosstalk and the aliasing of the first spectrum and the second spectrum, to be further ensured that energy Clearly the first spectrum and the second spectrum are compared and analyzed, and then further increase the accuracy of measurement result.
In one embodiment, the detector array is linear array detector.It can be into one using linear array detector Step reduces the production cost of above-mentioned spectrometer.
To achieve the above object, the present invention also provides a kind of water quality detecting devices, and the water quality detection device includes light source Component, the first sample area, the second sample area, the first optocoupler seaming element, the second optocoupler seaming element and above-mentioned spectrometer, the light source Component projects directional light to first sample area and second sample area respectively, and the directional light passes through first sample First light beam is formed behind area, one end of the first optocoupler seaming element is for receiving first light beam, the directional light Second light beam is formed behind second sample area, the other end of the first optocoupler seaming element enters with first light Loophole connection, one end of the second optocoupler seaming element for receiving second light beam, the second optocoupler seaming element it is another One end is connect with second optical entrance.
Above-mentioned water quality detecting device compares detection to water sample by using above-mentioned spectrometer, and water quality detection may make to fill Set Detection accuracy with higher and lower production costs.
In one embodiment, the light source assembly includes reflecting mirror and light bulb, and the light that the light bulb issues is through institute It states reflecting mirror and reflects to form the directional light.
In one embodiment, the light bulb can be deuterium lamp, halogen lamp, xenon lamp or LED light.
In one embodiment, the first optocoupler seaming element include the first condenser and the first optical fiber, described second Optocoupler seaming element includes second condenser lens and the second optical fiber, and first light beam enters described the after the first condenser optically focused One end of one optical fiber, the other end of first optical fiber are connect with first optical entrance, and second light beam passes through second Enter one end of second optical fiber after condenser optically focused, the other end of second optical fiber and second optical entrance connect It connects.
In one embodiment, first condenser can be simple lens, cemented doublet or self-focusing lens, institute Stating second condenser lens can be simple lens, cemented doublet or self-focusing lens.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of spectrometer described in one embodiment of the invention;
Fig. 2 is the structural schematic diagram of water quality detecting device described in one embodiment of the invention.
10, spectrometer, the 11, first collimating mirror, the 12, first grating, the 13, second collimating mirror, the 14, second grating, 15, imaging Reflecting mirror, 16, detector array, 161, light barrier, 20, light source assembly, 21, reflecting mirror, 22, light bulb, the 30, first sample area, 40, the second sample area, the 50, first optocoupler seaming element, the 51, first condenser, the 52, first optical fiber, the 60, second optocoupler seaming element, 61, second condenser lens, the 62, second optical fiber, the 70, first light beam, the 80, second light beam.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure Add thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another element "upper", There is no intermediary elements.Heretofore described " first ", " second " do not represent specific quantity and sequence, are only used for title Differentiation.
As shown in Figure 1, a kind of spectrometer 10, comprising: shell (not showed that in Fig. 1), the first collimating mirror 11, the first grating 12, the second collimating mirror 13, the second grating 14, imaging mirror 15 and detector array 16.First collimating mirror 11, the first grating 12, the second collimating mirror 13 and the second grating 14 are mounted in shell to adjustable angle respectively, wherein the first collimating mirror 11, the first light Grid 12, the second collimating mirror 13 and the second grating 14 can be mounted in shell by shaft to realize respective angular adjustment function respectively Energy.Shell is equipped with for the first optical entrance (not showing that in Fig. 1) of the first light beam incidence and for the incidence of the second light beam The second optical entrance (not showed that in Fig. 1), the first collimating mirror 11, the first grating 12 and imaging mirror 15 are along the first light beam 70 optical path is set gradually, so that the first light beam 70 forms the first spectrum on detector array 16;Second collimating mirror 13, second Grating 14 and imaging mirror 15 are set gradually along the optical path of the second light beam 80, so that the second light beam 80 is on detector array 16 Form the second spectrum.Above-mentioned detector array 16 can be area array detector 16 or linear array detector 16, it is preferable that above-mentioned battle array Row detector 16 is linear array detector 16.
Optical path trend inside above-mentioned spectrometer 10 is as follows: the first light beam enters in shell from the first optical entrance, after The first optical path successively is formed by the first collimating mirror 11, the first grating 12 and imaging mirror 15, finally in detector array 16 The first spectrum of upper formation;Second light beam 80 enters in shell from the second optical entrance, later successively by the second collimating mirror 13, the Two gratings 14 and imaging mirror 15 form the second optical path, and the second spectrum is finally formed on detector array 16.It can be seen that First optical path and the second optical path are separated from each other, so that the first optical path and the second optical path be made not to interfere, while passing through adjusting First collimating mirror 11, the first grating 12, the second collimating mirror 13 and the second grating 14 angle, it can be achieved that the first spectrum and the second light Spectrum is kept completely separate, so as to not have crosstalk between the first spectrum and the second spectrum, so as to clearly to the first spectrum and the second light Spectrum compares and analyzes, and effectively improves the accuracy of measurement result;Furthermore above-mentioned spectrometer 10 can be incited somebody to action without the use of cylindrical mirror First spectrum and the separation of the second spectrum, effectively save above-mentioned 10 production cost of spectrometer;Finally, the array in above-mentioned spectrometer 10 Detector 16 can be area array detector 16, can also be linear array detector 16, since the cost of area array detector 16 is remote Higher than the cost of linear array detector 16, therefore above-mentioned spectrometer 10 preferably uses linear array detector 16, thus further Reduce the production cost of above-mentioned spectrometer 10.
In one embodiment, the first collimating mirror 11 and the second collimating mirror 13 are in symmetrical with the middle vertical plane of imaging mirror 15 The heart symmetrically arranges that the first grating 12 is symmetrical as symmetrical centre using the middle vertical plane of imaging mirror 15 with the second grating 14 Arrangement.Above-mentioned setting is more convenient for by adjusting the first collimating mirror 11, the first grating 12, the second collimating mirror 13 and the second grating 14 Angle, so that the first spectrum and the second spectrum are kept completely separate.
In one embodiment, slit sheet is installed respectively in the first optical entrance and the second optical entrance.It can be narrow by changing The slit width of patch is so that the resolution ratio for being formed by the first spectrum and the second spectrum reaches necessary requirement.
In one embodiment, detector array 16 is equipped with for by the light barrier of the first spectrum and the second spectral separation 161.Above-mentioned light barrier 161 avoids crosstalk and the aliasing of the first spectrum and the second spectrum, so that being further ensured that can be clearly First spectrum and the second spectrum are compared and analyzed, and then further increase the accuracy of measurement result.
As shown in Fig. 2, a kind of water quality detecting device, including light source assembly 20, the first sample area 30, the second sample area 40, First optocoupler seaming element 50, the second optocoupler seaming element 60 and above-mentioned spectrometer 10.Light source assembly 20 is respectively to the first sample area 30 Directional light is projected with the second sample area 40, a branch of directional light forms above-mentioned first light beam, another beam after passing through the first sample area 30 Directional light forms above-mentioned second light beam 80 after passing through the second sample area 40.One end of first optocoupler seaming element 50 is for receiving first The other end of light beam, the first optocoupler seaming element 50 is connect with the first optical entrance.One end of second optocoupler seaming element 60 is for connecing The second light beam 80 is received, the other end of the second optocoupler seaming element 60 is connect with the second optical entrance.
The course of work of above-mentioned water quality detecting device is as follows: water sample to be measured is placed in the first sample area 30 first, it will be pure Water is placed in the second sample area 40;Then light source assembly 20 is projected to the first sample area 30 with the second sample area 40 parallel respectively Light, directional light form detection light (i.e. the first light beam) after passing through the first sample area 30, and directional light passes through shape behind the second sample area 40 At reference light (i.e. the second light beam 80);Detection light be pierced by from the first sample area 30 after after 50 optically focused of the first optocoupler seaming element from First optical entrance of spectrometer 10 enters in spectrometer 10, and detection light successively passes through the first collimating mirror 11, the first grating 12 The first optical path is formed with imaging mirror 15, finally forms the first spectrum on detector array 16;Reference light is from the second sample Area 40 enters in spectrometer 10 after 60 optically focused of the second optocoupler seaming element from the second optical entrance of spectrometer 10 after being pierced by, Detection light successively passes through the second collimating mirror 13, the second grating 14 and imaging mirror 15 and forms the second optical path, finally visits in array It surveys on device 16 and forms the second spectrum;Finally, being compared and analyzed to the first spectrum and the second spectrum.
Above-mentioned water quality detecting device compares detection to water sample by using above-mentioned spectrometer 10, may make above-mentioned water quality Detection device Detection accuracy with higher and lower production costs.
In one embodiment, light source assembly 20 includes reflecting mirror 21 and light bulb 22, wherein the reflecting mirror 21 is concave reflection Mirror 21, the light that light bulb 22 issues reflect to form directional light through reflecting mirror 21.
In one embodiment, light bulb 22 can be deuterium lamp, halogen lamp, LED light or xenon lamp, it is preferable that the light bulb 22 is xenon Lamp.
In one embodiment, the first optocoupler seaming element 50 includes the first condenser 51 and the first optical fiber 52.Second optical coupling Component 60 includes second condenser lens 61 and the second optical fiber 62.For the percent of pass for improving light beam, the first optical fiber 52 and the second optical fiber 62 Select UV, visible light optical fiber.First light beam enters one end of the first optical fiber 52, the first light after 51 optically focused of the first condenser The other end of fibre 52 is connect with the first optical entrance, and the second light beam 80 enters the second optical fiber 62 after 61 optically focused of second condenser lens One end, the other end of the second optical fiber 62 connect with the second optical entrance.
In one embodiment, the first condenser 51 can be simple lens, cemented doublet or self-focusing lens, the second optically focused Mirror 61 can be simple lens, cemented doublet or self-focusing lens.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (10)

1. a kind of spectrometer, which is characterized in that the spectrometer includes: shell, the first collimating mirror, the first grating, the second standard Straight mirror, the second grating, imaging mirror and detector array, first collimating mirror, first grating, second collimation Mirror and second grating are mounted on to adjustable angle in the shell respectively, and the shell is equipped with incident for the first light beam The first optical entrance and the second optical entrance for the incidence of the second light beam, first collimating mirror, first grating and The imaging mirror is set gradually along the optical path of first light beam, so that first light beam is on the detector array Form the first spectrum;The optical path of second collimating mirror, second grating and the imaging mirror along second light beam It sets gradually, so that second light beam forms the second spectrum on the detector array.
2. spectrometer according to claim 1, which is characterized in that first collimating mirror and second collimating mirror are with institute The middle vertical plane for stating imaging mirror is that symmetrical centre is symmetrically arranged, first grating and second grating with it is described at As the middle vertical plane of reflecting mirror is that symmetrical centre is symmetrically arranged.
3. spectrometer according to claim 1, which is characterized in that first optical entrance and second optical entrance It is upper that slit sheet is installed respectively.
4. spectrometer according to claim 1, which is characterized in that the detector array, which is equipped with, to be used for described first The light barrier of spectrum and second spectral separation.
5. spectrometer according to claim 1-4, which is characterized in that the detector array is linear array detection Device.
6. a kind of water quality detecting device, which is characterized in that the water quality detection device includes light source assembly, the first sample area, Two sample areas, the first optocoupler seaming element, the second optocoupler seaming element and spectrometer as described in any one in claim 1-5, it is described Light source assembly projects directional light to first sample area and second sample area respectively, and the directional light passes through described first First light beam is formed behind sample area, the directional light forms second light beam after passing through second sample area, described One end of first optocoupler seaming element is for receiving first light beam, the other end of the first optocoupler seaming element and described first Optical entrance connection, one end of the second optocoupler seaming element is for receiving second light beam, the second optocoupler seaming element The other end connect with second optical entrance.
7. spectrometer according to claim 6, which is characterized in that the light source assembly includes reflecting mirror and light bulb, described The light that light bulb issues reflects to form the directional light through the reflecting mirror.
8. spectrometer according to claim 7, which is characterized in that the light bulb can be deuterium lamp, halogen lamp, xenon lamp or LED Lamp.
9. spectrometer according to claim 6, which is characterized in that the first optocoupler seaming element include the first condenser and First optical fiber, the second optocoupler seaming element include second condenser lens and the second optical fiber, and first light beam passes through the first optically focused Enter one end of first optical fiber after mirror optically focused, the other end of first optical fiber is connect with first optical entrance, institute State one end that the second light beam enters second optical fiber after second condenser lens optically focused, the other end of second optical fiber and institute State the connection of the second optical entrance.
10. spectrometer according to claim 9, which is characterized in that first condenser can be for simple lens, double gluings thoroughly Perhaps the self-focusing lens second condenser lens can be simple lens, cemented doublet or self-focusing lens to mirror.
CN201811256076.5A 2018-10-26 2018-10-26 spectrometer and water quality detecting device Pending CN109187428A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050073679A1 (en) * 2002-07-25 2005-04-07 Gang He High optical rejection optical spectrum analyzer/monochromator
US20080094626A1 (en) * 2004-06-09 2008-04-24 Helmut Becker-Ross Echelle Spectometer with Improved Use of the Detector by Means of Two Spectrometer Arrangements
CN102103067A (en) * 2009-12-18 2011-06-22 天津市拓普仪器有限公司 Spectrophotometer optical system
CN103048046A (en) * 2012-12-21 2013-04-17 浙江大学 Double-beam spectrometer
CN106895919A (en) * 2016-12-30 2017-06-27 中国科学院长春光学精密机械与物理研究所 A kind of double-channel spectrometer structure for minimizing the linkage of four gratings
CN108458784A (en) * 2018-02-02 2018-08-28 乔士琪 A kind of monochromator
CN209132155U (en) * 2018-10-26 2019-07-19 广州市怡文环境科技股份有限公司 Spectrometer and water quality detecting device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050073679A1 (en) * 2002-07-25 2005-04-07 Gang He High optical rejection optical spectrum analyzer/monochromator
US20080094626A1 (en) * 2004-06-09 2008-04-24 Helmut Becker-Ross Echelle Spectometer with Improved Use of the Detector by Means of Two Spectrometer Arrangements
CN102103067A (en) * 2009-12-18 2011-06-22 天津市拓普仪器有限公司 Spectrophotometer optical system
CN103048046A (en) * 2012-12-21 2013-04-17 浙江大学 Double-beam spectrometer
CN106895919A (en) * 2016-12-30 2017-06-27 中国科学院长春光学精密机械与物理研究所 A kind of double-channel spectrometer structure for minimizing the linkage of four gratings
CN108458784A (en) * 2018-02-02 2018-08-28 乔士琪 A kind of monochromator
CN209132155U (en) * 2018-10-26 2019-07-19 广州市怡文环境科技股份有限公司 Spectrometer and water quality detecting device

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