CN2598072Y - Small differential spectrum absorption teaching demonstrator - Google Patents
Small differential spectrum absorption teaching demonstrator Download PDFInfo
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- CN2598072Y CN2598072Y CNU032195885U CN03219588U CN2598072Y CN 2598072 Y CN2598072 Y CN 2598072Y CN U032195885 U CNU032195885 U CN U032195885U CN 03219588 U CN03219588 U CN 03219588U CN 2598072 Y CN2598072 Y CN 2598072Y
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- absorption spectrum
- sample cell
- small
- difference absorption
- telescope
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Abstract
The utility model discloses a small differential spectrum absorption teaching demonstrator, including a telescope, a sample cell, a reflector and a spectrograph. The utility model is characterized in comprising an assembled lens telescope, a sample cell, an angle reflector and a grating spectrograph, wherein, the assembled lens telescope, the sample cell and the angle reflector are fastened on a same optical guide rail, under each part is padded with a mobile regulating base to regulate the whole system coaxially. Because of the small volume and low cost, the utility model can be arranged on an ordinary experiment table after the whole instrument is integrated, maintains the density inversion of the high sensitive spectral analysis in a differential absorption spectrum system and can measure and analyze the diverse gas compositions, thus the utility model is an integrated differential absorption spectrum system.
Description
Technical field
The utility model relates to atmospheric pollution measurement and analytic instruction field, exactly is a kind of small-sized difference absorption spectrum demonstration instrument for teaching.
Background technology
For the monitoring of trace contamination composition in the atmosphere, existing technology has chemical method (wet method), point type sampling station (claiming dry method again) and spectrum telemetry automatically.The difference absorption spectrum technology is a kind of in the spectrum telemetry, can monitor the multiple standards dusty gas simultaneously.In the related experiment teaching of the relevant analytical chemistry of present universities and colleges, environmental chemistry and spectral analysis, the teaching and the corresponding laboratory analytical instrument of chemical analysis and spectrophotometric method arranged.New spectrum education experiment requires to increase the introduction to difference absorption spectrum method, owing to be actually used in the difference absorption spectrum system price height of atmospheric surveillance, system is huge, and the system that need have specialty adjusts knowledge, obviously is not suitable for teaching and demonstration; In addition, though be used for the absorption spectrum that the spectrophotometer of spectral analysis can be measured liquid, solid and gaseous sample, the difference absorption spectrum analytical approach is inequality with it.Therefore, in measurement and analytic instruction, there is not to demonstrate the instrument of the difference absorption spectrum method of telemetering.
Be used for experimental teaching if will be actually used in the difference absorption spectrum instrument structure of atmospheric surveillance, following shortcoming arranged:
1, the light source that uses is xenon lamp, not only the price height.And needing high-voltage power supply, this lamp also discharges ozone (O
3) gas.
What 2, telescopic system adopted is coaxial Newtonian telescope configuration, beam Propagation is a total-reflection type, the hot spot that penetrates is a ring-type, the center is dark, under the limited optical path length condition in laboratory, the corner reflector core does not receive light, and the light intensity of total system is reduced, and can not satisfy the measurement needs.
What 3, corner reflector used is quartzy corner reflector, and price is expensive.
4, only be equipped with in the detector of spectrometer a kind of.
Summary of the invention
The purpose of this utility model is to spectral analysis experimental teaching field provides the difference absorption spectrum method demonstrator, can carry out air standard is polluted composition, and as sulphuric dioxide, nitrogen monoxide/nitrogen dioxide NO
2/ NO, ozone O
3Laboratory measurement.This instrument also is a kind of small-sized difference absorption spectrum instrument simultaneously, can be used for the experimental monitoring of pollution source discharging.
The utility model structure comprises telescope, sample cell, reverberator and spectrometer, it is characterized in that being made up of compound lens formula telescope, sample cell, corner reflector and grating spectrograph.Compound lens formula telescope, sample cell and corner reflector are fixed on the same optics guide rail, are lined with to move below each parts to adjust seat, and it is coaxial to be convenient to adjust total system.
Light source in the compound lens formula telescope is deuterium lamp or halogen tungsten lamp.
Compound lens formula telescope adopts the combination of reflecting prism and lens.
Described corner reflector is hollow corner reflector.
Sample cell is to be placed between the light path of compound lens formula telescope and hollow corner reflector.
Detector in the described grating spectrograph is equipped with one or both, and a kind of is line detector, and as charge coupled device ccd or diode array PDA, another kind joins rotating grating for photomultiplier and exit slit is realized spectrographic detection.
Penetrate behind light beam process reflecting prism that light source sends and the combination of lenses, through sample cell (there is different gas to be measured the inside), return by former road to hollow corner reflector reflection back, pass through sample cell once more, and assemble by primary mirror and to be coupled into optical fiber, optical fiber is with light beam lead-in light grating spectrograph, spectral signal through the spectrometer beam split is received by the detector that is connected the spectrometer exit portal, detector can be photomultiplier or linear array detector, as change couple device (CCD) and light diode array (PDA Photo Diode Array).Use the linear array device, directly the measure spectrum window gets final product, and as adopting photomultiplier, then realizes the detection of spectrum by rotating grating and exit slit.Spectral signal carries out data inversion by software for calculation and provides concentration, and can adjust parameter, calculating, demonstration phase process result step by step, reaches the effect of demonstration, is convenient to understand overall optical analysis of spectrum process.
Small-sized difference absorption spectrum demonstration instrument for teaching volume is little, cost is low.It is not the ratio that simply contracts that real atmosphere is measured the difference absorption spectrum system, and is inequality with it aspect a lot: 1, light source.Demonstrator adopts deuterium lamp and halogen tungsten lamp to cover ultraviolet near infrared spectral range, compares with the xenon lamp that real atmosphere difference absorption spectrum system adopts, have price low, need not high-voltage power supply, do not discharge O
3Advantage.2, telescope.Real atmosphere difference absorption spectrum system adopts coaxial Newtonian telescope arrangement, and beam Propagation all adopts the reflection mode, and the outgoing hot spot is a ring-type, and the center is dark.If this structure is used for 1.4 meters optical path length, corner reflector has only very that fraction is utilized, and is most of in the spot center of dark, can not realize the usable reflection to light.Thereby small-sized difference absorption spectrum teaching appliance adopts reflecting prism, the incompatible emission light beam of lens combination, increases light beam is used to improve light intensity.3, corner reflector.Real atmosphere difference absorption spectrum system uses quartzy corner reflector, and demonstrator adopts hollow corner reflector.4, sample cell is placed.Calibration sample pond diameter less (10-20mm) in the real atmosphere difference absorption spectrum system, be positioned over the front (importing the optical fiber place) of optical fiber head at light, and the sample cell of demonstrator is used for representing the dusty gas of atmosphere, is positioned over telescope between the light path of corner reflector.5, the detector of grating spectrograph can be equipped with one or both, and photomultiplier and line detector can be demonstrated the performance and the characteristics of two kinds of detectors.Effect of the present utility model:
The major advantage of small-sized difference absorption spectrum demonstration instrument for teaching is that volume is little, cost is low, can be placed on after whole instrument is integrated (1.4 meters) on the common experiment table, the high sensitivity spectral analysis and the retrieving concentration that have kept simultaneously the difference absorption spectrum system again, can measure and analyze the multiple gases composition, be a complete difference absorption spectrum system.Realized in the laboratory the demonstration of difference absorption spectrum principle remote measurement atmosphere pollution.Change two kinds of different detectors and can demonstrate the measurement characteristics of different detectors, small-sized, the easy to adjust and multispectral process software of system makes this instrument scope that can be widely used: 1, demonstration instrument for teaching, carry out the analysis of atmospheric pollution composition.2, pollution source monitor is as flue gas, vehicle exhaust.By selection to light source, can measure from deep ultraviolet to infrared spectrum, measure the multiple gases composition.3, absorption spectrum is used to measure the absorption characteristic of transparent solid, liquids and gases.4, transmitted spectrum is used for the transmissison characteristic of measuring samples, as optical mirror slip.
Description of drawings
Accompanying drawing is the utility model structural representation.
Embodiment
Referring to accompanying drawing: wherein 1, light source, 2, reflecting prism and combination of lenses, 3, primary mirror, 4, hollow corner reflection apparatus, 5, move and adjust seat, 6, optical fiber, 7, grating spectrograph, 8, detector, 9, sample cell, 10, the optics guide rail, 11, telescope.
Telescope 11, sample cell 9 and corner reflector 4 are fixed on the same optics guide rail 10, and it is coaxial to be convenient to adjust total system.5 for moving the adjustment seat.Light source 1 adopts deuterium lamp or halogen tungsten lamp.The light beam that light source 1 sends penetrates through reflecting prism and combination of lenses 2 backs, through sample cell 9 (there is different gas to be measured the inside), return by former road by hollow corner reflector 4 reflection backs, pass through sample cell 9 once more, and assemble by primary mirror 3 and to be coupled into optical fiber, optical fiber is with light beam lead-in light grating spectrograph 7, spectral signal through the spectrometer beam split is received by the detector 8 that is connected the spectrometer exit portal, detector can be photomultiplier or linear array detector, as charge coupled device ccd and light diode array PDA (Photo Diode Array).Use the linear array device, directly the measure spectrum window gets final product, and as adopting photomultiplier, then realizes the detection of spectrum by rotating grating and exit slit.Spectral signal carries out data inversion by software for calculation and provides concentration, and can adjust parameter, calculating, demonstration phase process result step by step, reaches the effect of demonstration, is convenient to understand overall optical analysis of spectrum process.
Claims (6)
1, a kind of small-sized difference absorption spectrum demonstration instrument for teaching, comprise telescope, sample cell, reverberator and spectrometer, it is characterized in that forming by compound lens formula telescope, sample cell, corner reflector and grating spectrograph, compound lens formula telescope, sample cell and corner reflector are fixed on the same optics guide rail, be lined with to move below each parts and adjust seat, it is coaxial to adjust total system.
2, small-sized difference absorption spectrum demonstration instrument for teaching according to claim 1 is characterized in that the light source in the compound lens formula telescope is deuterium lamp or halogen tungsten lamp.
3, small-sized difference absorption spectrum demonstration instrument for teaching according to claim 1 is characterized in that compound lens formula telescope adopts the combination of reflecting prism and lens.
4, small-sized difference absorption spectrum demonstration instrument for teaching according to claim 1 is characterized in that described corner reflector is hollow corner reflector.
5, small-sized difference absorption spectrum demonstration instrument for teaching according to claim 1 is characterized in that sample cell is to be placed between the light path of compound lens formula telescope and hollow corner reflector.
6, small-sized difference absorption spectrum demonstration instrument for teaching according to claim 1, it is characterized in that the detector in the described grating spectrograph is equipped with one or both, a kind of is line detector, as charge coupled device ccd or diode array PDA, another kind joins rotating grating for photomultiplier and exit slit is realized spectrographic detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032195885U CN2598072Y (en) | 2003-01-23 | 2003-01-23 | Small differential spectrum absorption teaching demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032195885U CN2598072Y (en) | 2003-01-23 | 2003-01-23 | Small differential spectrum absorption teaching demonstrator |
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| Publication Number | Publication Date |
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| CN2598072Y true CN2598072Y (en) | 2004-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU032195885U Expired - Fee Related CN2598072Y (en) | 2003-01-23 | 2003-01-23 | Small differential spectrum absorption teaching demonstrator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100538289C (en) * | 2007-09-30 | 2009-09-09 | 中国科学院安徽光学精密机械研究所 | Differential absorption spectrometer import optic block |
| CN104007069A (en) * | 2014-05-20 | 2014-08-27 | 中国科学院合肥物质科学研究院 | Differential optical absorption spectroscopy measurement system based on off-axis paraboloid mirror |
| CN108931489A (en) * | 2018-09-10 | 2018-12-04 | 复旦大学 | A kind of difference absorption spectrum system based on glyoxal concentration in LED light source measurement atmosphere |
| CN109192028A (en) * | 2018-11-02 | 2019-01-11 | 南宁市北湖路小学 | Spectrum analysis demonstrator |
| WO2019179699A1 (en) * | 2018-03-22 | 2019-09-26 | Hochschule Mannheim | Spectrometer apparatus, method for operating the apparatus, and use thereof |
| CN110501299A (en) * | 2019-09-03 | 2019-11-26 | 苏州微纳激光光子技术有限公司 | One kind focusing long light path toxic and harmful gas monitoring system and its monitoring method automatically |
| CN112385562A (en) * | 2020-11-09 | 2021-02-23 | 黄高卫 | Clothes for pet dog |
-
2003
- 2003-01-23 CN CNU032195885U patent/CN2598072Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100538289C (en) * | 2007-09-30 | 2009-09-09 | 中国科学院安徽光学精密机械研究所 | Differential absorption spectrometer import optic block |
| CN104007069A (en) * | 2014-05-20 | 2014-08-27 | 中国科学院合肥物质科学研究院 | Differential optical absorption spectroscopy measurement system based on off-axis paraboloid mirror |
| CN104007069B (en) * | 2014-05-20 | 2017-04-19 | 中国科学院合肥物质科学研究院 | Differential optical absorption spectroscopy measurement system based on off-axis paraboloid mirror |
| WO2019179699A1 (en) * | 2018-03-22 | 2019-09-26 | Hochschule Mannheim | Spectrometer apparatus, method for operating the apparatus, and use thereof |
| CN108931489A (en) * | 2018-09-10 | 2018-12-04 | 复旦大学 | A kind of difference absorption spectrum system based on glyoxal concentration in LED light source measurement atmosphere |
| CN108931489B (en) * | 2018-09-10 | 2020-12-22 | 复旦大学 | Differential absorption spectrum system for measuring concentration of glyoxal in atmosphere based on LED light source |
| CN109192028A (en) * | 2018-11-02 | 2019-01-11 | 南宁市北湖路小学 | Spectrum analysis demonstrator |
| CN109192028B (en) * | 2018-11-02 | 2023-09-22 | 南宁市北湖路小学 | Spectrum analysis demonstration instrument |
| CN110501299A (en) * | 2019-09-03 | 2019-11-26 | 苏州微纳激光光子技术有限公司 | One kind focusing long light path toxic and harmful gas monitoring system and its monitoring method automatically |
| CN112385562A (en) * | 2020-11-09 | 2021-02-23 | 黄高卫 | Clothes for pet dog |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |