CN104165843A - Optical cell with continuously variable optical path - Google Patents
Optical cell with continuously variable optical path Download PDFInfo
- Publication number
- CN104165843A CN104165843A CN201310187569.9A CN201310187569A CN104165843A CN 104165843 A CN104165843 A CN 104165843A CN 201310187569 A CN201310187569 A CN 201310187569A CN 104165843 A CN104165843 A CN 104165843A
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- optical
- corrugated
- pipe
- corrugated pipe
- sealing
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- 230000003287 optical effect Effects 0.000 title claims abstract description 56
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 230000008859 change Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 13
- 230000006698 induction Effects 0.000 claims description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 230000013011 mating Effects 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- PFNQVRZLDWYSCW-UHFFFAOYSA-N (fluoren-9-ylideneamino) n-naphthalen-1-ylcarbamate Chemical compound C12=CC=CC=C2C2=CC=CC=C2C1=NOC(=O)NC1=CC=CC2=CC=CC=C12 PFNQVRZLDWYSCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000005083 Zinc sulfide Substances 0.000 claims description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 2
- 230000007306 turnover Effects 0.000 claims description 2
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 238000000825 ultraviolet detection Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000002835 absorbance Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004451 qualitative analysis Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000002798 spectrophotometry method Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 238000002371 ultraviolet--visible spectrum Methods 0.000 description 1
Landscapes
- Optical Measuring Cells (AREA)
Abstract
The invention provides an optical cell with a continuously variable optical path. The optical cell can be used for optical detection like infrared and UV detection. The optical cell system with the continuously variable optical path mainly comprises a corrugated pipe, sealing faces and optical windows, wherein two ends of the corrugated pipe have end faces resembling to flange structures, the sealing faces match with the end faces at the two ends of the corrugated pipe and are similar to flanges, and the optical windows are located between the end faces and the sealing faces. The corrugated pipe is composed of a telescopic annular corrugated section located at the middle part and straight pipe sections located at two sides. The straight pipe sections at the two sides of the corrugated pipe are respectively connected with an inlet pipe and an outlet pipe for gas and liquid mediums, and flowing-in and flowing-out of the mediums are controlled through switching valves on the inlet pipe and the outlet pipe. Holes are formed in the centers of the end faces at the two ends of the corrugated pipe and in the centers of the sealing faces matching with the end faces, the optical windows can be correspondingly placed, and sealing of the system can be realized via six screw holes in the end faces and the sealing faces. The corrugated pipe is respectively fixed on the fixed plate and the movable plate of an electric displacement platform located at a lower part through two supports connected with the lower side surface of the corrugated pipe; the annular corrugated section of the corrugated pipe is stretched or compressed by moving the movable plate to change the length of the corrugated pipe, so the optical path length of the optical cell is changed and controlled.
Description
Technical field
The present invention relates in general to photochemistry detection field, is specifically related to a kind of optical detection optical cell of continous way variable light path, is suitable for gas and liquid medium, can be applicable to infrared, in the optical detection means such as uv-vis spectra.
Background technology
For optical detection means, such as infrared, ultraviolet detection etc., owing to having fast, the advantage such as convenience, high sensitivity, are widely used in material detection, and structure analysis, in the qualitative and quantitative analysis such as concentration detection.For qualitative analysis, adopt length scanning more, because functional group in material is to a certain monochromatic characteristic absorption, can obtain the feature spectrogram of this material.With the contrast of standard spectrogram, can analyze qualitatively material.And for quantitative test, the general spectrophotometric method that adopts, according to langbobier law, in detected solution there is proportional relation to a certain monochromatic receptivity and its concentration in the characteristic group of certain determinand, obtain its response factor by preparing the standard solution of this determinand, according to the absorbance of this determinand in detected solution, calculate the wherein amount of this determinand.In general,, in the time that total absorbance is between 0.2～0.7, instrument has less error at measurment and higher sensitivity.Based on spectrophotometric method, the absorbance of mensuration is directly proportional to the path by light.In general mensuration process, use the optical cell (multiplex aquarium and quartz cell) with certain size size, its optical path length remains unchanged.For ensureing higher instrumental sensitivity, for the higher sample of concentration, the samples that adopt the mode of dilution to obtain low concentration more, and for the lower sample of concentration, use the optical cell with larger light path, Renewal process comparatively bothers, and also easily brings cross pollution, the problems such as cost increases, the difficult recovery of sample.Adopt the optical cell that light path can modulation, by regulating its light path to meet the optical detecting of the sample of various variable concentrations, it is easy and simple to handle, obviously more applicable.
But in existing patented technology, the optical cell that feasible light path can modulation is also few, and all has certain defect.For example, in the Chinese utility model " the thick infrared flow cell of the adjustable high pressure of heating continuously in pond " that application number is 85200040 a kind of pond is proposed, wherein in the plug of ring-type, circular channel is light path access opening, crystal window is convex cylindrical body structure, can carry out regulating reservoir thick (optical length) by changing the crystal window of different land length.Obviously the method is pretty troublesome, is not suitable for the continuous adjusting of light path.Comparatively speaking, adopt frame mode in the form of piston to change light path relatively more simple, for example, in the Chinese utility model " a kind of near infrared detection flow cell of continous way variable light path " that application number is 201020110561.4, propose, carry out modulation optical path length continuously by the mobile hollow screw coordinating with it in hollow screw body, but there is obvious shortcoming in the method.For example, in mensuration process, being especially in use in the liquid of High Temperature High Pressure or the mensuration of gas, there is larger problem in the sealing between hollow screw and hollow screw body, what is more important, and hollow screw is present in light path, therefore must use special material.For example, in the near infrared detection of its potential application, selection material is glass, quartz, lime chloride or sodium chloride etc., but exist significantly this material and medium incompatible, the problems such as sealing and structural design, and these problems are not mentioned in this patent.
Summary of the invention
The present invention, just for the defect in the technical design existing in the variable optical cell of existing light path, utilizes the good retractility of corrugated tube, and the intelligent modulation in conjunction with electricity driving displacement platform to its length is realized automatically accurately controlling of light path.The method is simple, processing ease, and total is also very simple, and body is easy to clean.The more important thing is that total sealing is good, applicable to the mensuration of the gas-liquid medium of High Temperature High Pressure, have larger practical value and application prospect.
In this invention, the optical cell system of light path continuous variable mainly comprises that two ends have the corrugated tube of the end face of similar flange arrangement, the sealing surface of the similar flange mating with corrugated tube two ends end face and be placed in end face and sealing surface between optical window.All there is hole in the center of the two ends end face of corrugated tube and the sealing surface matching, can correspondence put into optical window, and carry out the sealing of system by six screw mouths on end face and sealing surface.The induction pipe and the outlet that on corrugated tube, on annular corrugated both sides straight tube, are connected with respectively gas-liquid medium, carry out the turnover of control medium by the switch valve on induction pipe and outlet.Corrugated tube, by being separately fixed on the fixed head and movable plate of electricity driving displacement platform of bottom with its lower two supports that are connected of surveying, by the movement of movable plate, can stretch or compress bellows, changes its length, thereby controls the optical path length of optical cell.
Be elaborated below in conjunction with accompanying drawing
Fig. 1 is the structure cut-open view of the optical cell of light path continuous variable.
Fig. 2 is the structure right view of ripple tube portion in this optical cell.
Fig. 3 is the structure right view of the sealing surface that mates with this optical cell corrugated tube part.
Specific embodiments:
As shown in Figure 1, the optical cell system of light path continuous variable mainly comprises that two ends have the corrugated tube 1 of the end face 3 of similar flange arrangement, the sealing surface 4 of the similar flange mating with corrugated tube two ends end face 3 and be placed in end face 3 and sealing surface 4 between optical window 5.Corrugated tube 1 is generally stainless steel material and makes, and also can be made up of other materials, and it is annular corrugated 2 that intermediate portion is divided into, can be by stretching and compressing to change its length.By using different materials corrugated tube that make or that have different length, the optical path length of optical cell can change between um～dm.The two ends of corrugated tube 1 are straight-tube portion, and its side is connected with respectively induction pipe 13 and the outlet 15 of gas-liquid thing to be measured, are connected with respectively switch valve 14 and 16 on induction pipe 13 and outlet 15 again, control the flow state of determinand.In the time opening switch valve 14 and 16, gas-liquid medium to be measured enters in corrugated tube 1 from induction pipe 13, flows out from outlet 16, and therefore this optical cell can be used for measuring the gas-liquid medium of flow state, is particularly suitable for the detection of material under reactiveness.Also can shut switch valve 14 and 16, measure the gas-liquid medium under stationary state.There is a certain size small annular holes 8 in the center of the two ends end face of corrugated tube 1, as shown in Figure 2, the size of this small annular holes 8 can design as requested.Can put into successively seal element 6 and the optical window 5 of suitable size, add the sealing surface 4 of the similar flange mating with the two ends end face 3 of corrugated tube 1, carry out the sealing of system by six the screw mouths 7 on end face 3 and sealing surface 4.Wherein optical window 5, according to actual requirement, can select the materials such as glass, quartz, sodium chloride, calcium fluoride, zinc sulphide and zinc selenide to make.Six screw mouths 7 are distribution symmetrically on end face 3, can ensure stressed even in the fixation procedure of screw.Similar with the end face 3 of corrugated tube 1, also there is the small annular holes 9 of formed objects in the center of sealing surface 4, as shown in Figure 3, and six the screw mouths 7 that simultaneously also distributing equably on sealing surface 4 are corresponding with the hole on end face 3.
The two ends, downside left and right of corrugated tube are fixed on the movable plate and fixed head of electricity driving displacement platform 12 of bottom by traversing carriage 10 and fixed support 11 respectively, and the inner structure of electricity driving displacement platform 12 does not draw.Under the control of motor internal, movable plate moves on surface level, drives the left part of traversing carriage 10 and corrugated tube 1 to move left and right, and stretches or annular corrugated section 2 of compress bellows 1, changes its length, thereby controls the optical path length of optical cell.In the time measuring, optical cell is placed in to light path, light is injected in the gas-liquid medium to be measured optical cell from the optical window in left side, from the optical window on right side out, measures the concentration of determinand by the decrease of light intensity and the size of absorbance.In mensuration process, because the concentration of determinand is too low or too high, cause absorbance too low or too high, the resultant error of measuring can be larger, at this moment can be by controlling the length of optical cell, stretch or compress bellows 1, make the size of absorbance between 0.2～0.7, obtain good measurement result.
Claims (8)
1. the optical cell of a light path continuous variable.
2. according to the optical cell of a kind of light path continuous variable claimed in claim 1, it is characterized in that it mainly comprises that two ends have the corrugated tube of the end face of similar flange arrangement, the sealing surface of the similar flange mating with corrugated tube two ends end face and be placed in end face and sealing surface between optical window.
3. according to corrugated tube claimed in claim 2, it is characterized in that it is made up of telescopic annular corrugated section of centre and the straight length of both sides.
4. according to annular corrugated section claimed in claim 3, it is characterized in that by stretching or compressing, changing its length, thus the optical path length of change optical cell.
5. according to the straight length of both sides claimed in claim 3, it is characterized in that induction pipe and outlet that it is connecting respectively gas-liquid medium, carry out the turnover of control medium by the switch valve on induction pipe and outlet.
6. according to corrugated tube claimed in claim 2, it is characterized in that existing on its two ends end face being distribute symmetrically six the screw mouths for sealing, and there is a certain size small annular holes in end face center.
7. according to the sealing surface of similar flange claimed in claim 2, it is characterized in that wherein feeling the small annular holes at a certain size, mate with the corrugated pipe end plane described in claim 6, optical window is put in centre, and seals.
8. according to optical window claimed in claim 2, it is characterized in that can be according to actual requirement, selects the materials such as glass, quartz, sodium chloride, calcium fluoride, zinc sulphide and zinc selenide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310187569.9A CN104165843A (en) | 2013-05-20 | 2013-05-20 | Optical cell with continuously variable optical path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310187569.9A CN104165843A (en) | 2013-05-20 | 2013-05-20 | Optical cell with continuously variable optical path |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104165843A true CN104165843A (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310187569.9A Pending CN104165843A (en) | 2013-05-20 | 2013-05-20 | Optical cell with continuously variable optical path |
Country Status (1)
| Country | Link |
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| CN (1) | CN104165843A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655589A (en) * | 2015-02-04 | 2015-05-27 | 中国人民解放军电子工程学院 | Device and method for testing continuously adjustable optical path and capacity particle extinction coefficient |
| CN106290249A (en) * | 2016-10-12 | 2017-01-04 | 武汉智勤创亿信息技术有限公司 | A kind of integrated small laser gas detection components |
| CN106596407A (en) * | 2016-12-30 | 2017-04-26 | 黄华 | Optical inspection cell with adjustable size and system thereof |
| CN108318419A (en) * | 2017-12-20 | 2018-07-24 | 北京航天计量测试技术研究所 | A kind of vacuum chamber measured in real time for air refraction |
| CN111375103A (en) * | 2020-03-27 | 2020-07-07 | 四川大学 | Intravenous infusion safety monitoring device and using method thereof |
| CN113008838A (en) * | 2021-03-17 | 2021-06-22 | 华北电力大学 | Optical cavity, heating cavity, measuring device and liquid medium transmission spectrum measuring system |
-
2013
- 2013-05-20 CN CN201310187569.9A patent/CN104165843A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655589A (en) * | 2015-02-04 | 2015-05-27 | 中国人民解放军电子工程学院 | Device and method for testing continuously adjustable optical path and capacity particle extinction coefficient |
| CN106290249A (en) * | 2016-10-12 | 2017-01-04 | 武汉智勤创亿信息技术有限公司 | A kind of integrated small laser gas detection components |
| CN106596407A (en) * | 2016-12-30 | 2017-04-26 | 黄华 | Optical inspection cell with adjustable size and system thereof |
| CN108318419A (en) * | 2017-12-20 | 2018-07-24 | 北京航天计量测试技术研究所 | A kind of vacuum chamber measured in real time for air refraction |
| CN111375103A (en) * | 2020-03-27 | 2020-07-07 | 四川大学 | Intravenous infusion safety monitoring device and using method thereof |
| CN111375103B (en) * | 2020-03-27 | 2020-12-25 | 四川大学 | Intravenous infusion safety monitoring device and using method thereof |
| CN113008838A (en) * | 2021-03-17 | 2021-06-22 | 华北电力大学 | Optical cavity, heating cavity, measuring device and liquid medium transmission spectrum measuring system |
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Addressee: Huang Hua Document name: Notification of Publication of the Application for Invention |
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Effective date of registration: 20150414 Address after: 410205, Hunan, Changsha hi tech Development Zone, Lu Feng Road, No. 69, Jin Rui entrepreneurial base, the original crystal source electronic testing center 1 floor Applicant after: HUNAN HUASI INSTRUMENT CO., LTD. Address before: 100871 School of chemistry and molecular engineering, Peking University, 202 Fu Cheng Road, Beijing, Haidian District Applicant before: Huang Hua |
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Application publication date: 20141126 |