CN102590139B - Refractive index measuring device of transparent fluid under high pressure - Google Patents
Refractive index measuring device of transparent fluid under high pressure Download PDFInfo
- Publication number
- CN102590139B CN102590139B CN201210038182.2A CN201210038182A CN102590139B CN 102590139 B CN102590139 B CN 102590139B CN 201210038182 A CN201210038182 A CN 201210038182A CN 102590139 B CN102590139 B CN 102590139B
- Authority
- CN
- China
- Prior art keywords
- window
- refractive index
- measuring device
- sealing mechanism
- high pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a refractive index measuring device of transparent fluid under high pressure; a light beam output by a light source is converted into a parallel light through a concave mirror, the parallel light beam vertically enters a window I through a reflecting mirror and a sampling mirror sequentially and vertically enters an entrance of a spectrometer through to-be-measured fluid which is placed in a sealing mechanism and a window II; the surfaces of the window I and the window II are arranged in parallel, the power of the output parallel light beam which is reflected by the sampling mirror is monitored and measured by a power monitor, the temperature of the sealing mechanism which contains the to-be-measured fluid is measured by a thermal couple, a thermostat is used for keeping the temperature of the to-be-measured fluid in the experiment to be constant, a switch I is used for controlling the injection of the gas to increase the fluid pressure in the sealing mechanism, a switch II is used for controlling a vacuum pump to work so as to reduce the pressure of the to-be-measured fluid in the sealing mechanism, and the pressure of the to-be-measured fluid is measured by a pressure measuring device. The refractive index measuring device can realize the method of measuring the refractive index of high-pressure transparent fluid under different wavelengths in a wide spectrum range at the same time, and the device is simple in structure, convenient in adjustment and high in measuring precision.
Description
Technical field
The invention belongs to field of optical measuring technologies, relate generally to the simultaneously-measured method and apparatus of refractive index of transparent fluid different wave length under high pressure.
Background technology
Refractive index is the ratio of the aerial speed of light and the speed of light in this material, it is one of fundamental physical quantity characterizing optical transparency material optical property, different components concerning liquid, refractive index is different, and gas refracting index is relevant with air pressure, temperature, humidity and gas componant.By measuring the space distribution of refractive index in medium and over time, and then qualitative analysis and even quantitatively determine other various related physical quantities, have many important practical applications, therefore, under measurement different pressures, fluid refractive index is significant for fluid behaviour under research high pressure.At present, different materials, the measuring method of refractive index is different, the conventional method of refractometry has: (1) is used the method for minimum deviation angle of spectrometer, although the method measuring accuracy is high, also high to the requirement of testing sample, except sample being processed into prism, also to be processed into prism drift angle and wherein the flatness of two planes have higher accuracy requirement, increased measurement cost; (2) Abbe refractometer critical angle method, the method measuring error many factors, and require the refractive index of sample must not be greater than 1.7, thereby can not use some sample; (3) interference technique, this method is in measuring process, and because testing sample and optical path need be adjusted repeatedly, thereby light path adjusts complicatedly, and intensity hand-manipulated is large, and the measuring process time is long, is unfavorable for realizing the robotization of measuring process.
Domestic patent of invention ZL86107252 provides interference technique to measuring device of refraction index of air, patent of invention ZL90102943 provides a kind of automatic V Refractive Index of Glass Prism instrument of measuring the transparency material refractive indexes such as glass, patent of invention ZL93114899 provides a kind of air refraction measuring method of moving based on laser cavity change displacement, external patent of invention US7130060B2 provides the refractometry method that small interference reflection is surveyed, US4733967 and US4685803 provide gas refracting index measuring method and the device that adopts interferometric method, these patents are development of the refraction index test method based on conventional above, due to its limitation, cannot use the under high pressure refractometry of fluid.
The present invention proposes transparent fluid under high pressure (liquids and gases) measuring method and device in the wide range scope different wave length refractive index of (relating to far infrared and ultraviolet region), realization is changed measurement accurately, fast and automatically to sample refractive index, can provide the dispersion equation of transparent fluid under high pressure simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is to provide transparency liquid/gas refracting index measurement mechanism under a kind of high pressure.
The technical scheme that under high pressure in the present invention, transparency liquid/gas refracting index measurement mechanism adopts is: light source output beam becomes directional light through concave mirror, parallel beam impinges perpendicularly on window I successively after catoptron and sampling mirror, then impinges perpendicularly on spectrometer entrance after being placed on the detected fluid of sealing mechanism and window II; The surface of window I and window II be arranged in parallel, the parallel beam being reflected by sampling mirror carries out control survey by power-monitoring instrument to the parallel beam power of output, the sealing mechanism of splendid attire detected fluid is measured temperature by thermocouple, by constant temperature oven, keep detected fluid temperature constant in experiment, switch I is for controlling the injection of gas, to increase sealing mechanism inner fluid pressure, switch II is used for controlling vacuum pump work, to reduce detected fluid pressure in sealing mechanism, the pressure of detected fluid is measured by pressure-measuring device.
The invention has the beneficial effects as follows, to transparent fluid (liquids and gases) measuring method and device in the wide range scope different wave length refractive index of (relating to far infrared and ultraviolet region), to be applied to the real-time diagnosis of high pressure transparent fluid refractive index, provide the dispersion equation of multiple transparent medium simultaneously; Apparatus structure is simple, easy to adjust, and measuring accuracy is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of refractive index measuring device of transparent fluid under high pressure of the present invention.
In figure, 1. catoptron 2. light source 3. concave mirror 4. sampling mirror 5. power-monitoring instrument 6. thermocouple 7. constant temperature oven 8. window I 9. detected fluid 10. sealing mechanism 11. window II 12. spectrometer 13. temperature indicator 14. gas 15. switch I 16. feed channel 17. pressure-measuring device 18. switch II, 19. vacuum pumps.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, light source 2 output beams become directional light through concave mirror 3, light beam impinges perpendicularly on window I 8 after catoptron 1 and sampling mirror 4, light beam impinges perpendicularly on spectrometer 12 after being placed on the detected fluid 9 of sealing mechanism 10 and window II 11, window I 8 is parallel with the surface of window II 11, the light beam being reflected by sampling mirror 4 carries out control survey by the light beam power of 5 pairs of outputs of power-monitoring instrument, the sealing mechanism 10 of splendid attire detected fluid 9 is measured temperature by thermocouple 6, by constant temperature oven 7, keep detected fluid 9 temperature constant in experiment, open switch I 15 injecting gas 14 and increase sealing mechanism 10 inner fluid pressure, or open switch II 18 and allow vacuum pump 19 work simultaneously, reduce interior detected fluid 9 pressure of sealing mechanism 10, the pressure of detected fluid 9 is measured by pressure-measuring device 17.
Window I 8 is AL with the material of window II 11
2o
3; Window I 8 is parallel with the surface of window II 11, and the depth of parallelism is less than 1 °, and former and later two surfaces of window I 8 and the front and rear surfaces face type of window II 11 require to be less than λ/4, λ=632.8nm;
The thickness of the detected fluid 9 in sealing mechanism 10 is as far as possible little, gets 1 ~ 2mm.
By regulating the output power of light source 2, make to enter strength signal on spectrometer 12 between (1/2 ~ 2/3) maximal value;
From the light beam of window II 11 outgoing, also can adopt Optical Fiber Transmission to the slit entrance of spectrometer 12, optical fiber two ends complete respectively from the light beam of window II 11 outgoing and the coupling of optical fiber one end by five dimension governor motions, the coupling of the slit of the optical fiber other end and spectrometer 12;
When incident light impinges perpendicularly on dielectric surface, reflectivity (or transmissivity) is relevant with refractive index; For the light of a certain wavelength X, the temperature of cavity inner fluid is
t 0, pressure is
p 0time, the transmissivity of light beam front and rear surfaces in window and cavity can be write as:
In formula,
n wbe window material for the refractive index of a certain wavelength, in vacuum, the refractive index of a certain wavelength is
n 0; If cavity hydrodynamic pressure is
p 1, temperature is
t 1time, for the light of a certain wavelength X, in window and cavity interior wall rear surface, transmissivity is:
In formula,
n git is the refractive index for fluid under a certain wavelength.If through temperature be
t 0, pressure is
p 0cavity fluid and temperature are
t 1, pressure is
p 1time transmitted light intensity be respectively
with
, transmitted light intensity ratio is respectively:
By measuring the light intensity of different pressures and temperature cavity of resorption inner fluid
with
, in known window and vacuum refractive index
n wwith
n 0in situation, establish
The refractive index of fluid under corresponding wavelength can obtain according to following equation:
Adopt spectrometer 12 to provide multiple transparent fluid after the different wave length refractive index of wide range scope, can provide dispersion equation.
Claims (7)
1. a refractive index measuring device of transparent fluid under high pressure, it is characterized in that: the light source in described measurement mechanism (2) output beam becomes directional light through concave mirror (3), parallel beam impinges perpendicularly on window I (8) successively after catoptron (1) and sampling mirror (4), then impinges perpendicularly on spectrometer (12) entrance after being placed on the detected fluid (9) of sealing mechanism (10) and window II (11), window I (8) be arranged in parallel with the surface of window II (11), parallel beam by sampling mirror (4) reflection carries out control survey by power-monitoring instrument (5) to the parallel beam power of output, the sealing mechanism (10) of splendid attire detected fluid (9) is measured temperature by thermocouple (6), by constant temperature oven (7), keep detected fluid (9) temperature constant in experiment, switch I (15) is for controlling the injection of gas (14), to increase sealing mechanism (10) inner fluid pressure, switch II (18) is for controlling vacuum pump (19) work, to reduce the interior detected fluid of sealing mechanism (10) (9) pressure, the pressure of detected fluid (9) is measured by pressure-measuring device (17).
2. refractive index measuring device of transparent fluid under high pressure according to claim 1, is characterized in that: described light source (2) is wideband light source.
3. refractive index measuring device of transparent fluid under high pressure according to claim 2, is characterized in that: described wideband light source is the output power bromine tungsten filament lamp that adjustable, degree of stability is less than 0.01% continuously.
4. refractive index measuring device of transparent fluid under high pressure according to claim 1, is characterized in that: the thickness of the detected fluid (9) in described sealing mechanism (10) is 1 ~ 2mm.
5. refractive index measuring device of transparent fluid under high pressure according to claim 1, it is characterized in that: described window I (8) is less than 1 ° with the surperficial depth of parallelism of window II (11), former and later two surfaces of window I (8) and the front and rear surfaces face type of window II (11) are less than λ/4, λ=632.8nm.
6. refractive index measuring device of transparent fluid under high pressure according to claim 1, is characterized in that: described spectrometer (12) strength stability is less than 0.01%.
7. refractive index measuring device of transparent fluid under high pressure according to claim 1, is characterized in that: described sealing mechanism (10) inwall is black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210038182.2A CN102590139B (en) | 2012-02-21 | 2012-02-21 | Refractive index measuring device of transparent fluid under high pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210038182.2A CN102590139B (en) | 2012-02-21 | 2012-02-21 | Refractive index measuring device of transparent fluid under high pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102590139A CN102590139A (en) | 2012-07-18 |
| CN102590139B true CN102590139B (en) | 2014-01-22 |
Family
ID=46479080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210038182.2A Expired - Fee Related CN102590139B (en) | 2012-02-21 | 2012-02-21 | Refractive index measuring device of transparent fluid under high pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102590139B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121390B (en) * | 2017-06-08 | 2020-06-19 | 河南师范大学 | Pressurizing device for testing liquid refractive index |
| CN108169174A (en) * | 2017-12-28 | 2018-06-15 | 中国科学院长春光学精密机械与物理研究所 | A kind of liquid refractivity test device and test method based on the method for minimum deviation angle |
| CN116908116A (en) * | 2023-09-13 | 2023-10-20 | 中国工程物理研究院流体物理研究所 | Multiple compressed fluid single-shot multiple information diagnostic target |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202502049U (en) * | 2012-02-21 | 2012-10-24 | 中国工程物理研究院流体物理研究所 | Measuring device for refractive indexes of transparent fluids under high pressure |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1245878A (en) * | 1985-12-31 | 1988-12-06 | Jurgen H. Achtermann | Precise determination of the compressibility factor of a gas from refractive index measurements |
| US4685803A (en) * | 1986-01-23 | 1987-08-11 | Zygo Corporation | Method and apparatus for the measurement of the refractive index of a gas |
| CN86107252B (en) * | 1986-10-21 | 1988-07-20 | 北京机械工业管理学院分部 | Air Refractive Index Measuring Device |
| US5311274A (en) * | 1992-05-11 | 1994-05-10 | Cole Jr Charles F | Fiber optic refractometer |
| JPH07159321A (en) * | 1993-12-02 | 1995-06-23 | Kobe Steel Ltd | Measuring method for refractive index of gas at inside of high-pressure container |
| FR2832505B1 (en) * | 2001-11-16 | 2008-07-04 | Inst Francais Du Petrole | OPTICAL FIBER REFRACTOMETER |
| US6683681B2 (en) * | 2002-04-10 | 2004-01-27 | Baker Hughes Incorporated | Method and apparatus for a downhole refractometer and attenuated reflectance spectrometer |
| US7130060B2 (en) * | 2002-09-05 | 2006-10-31 | Texas Tech University System | Refractive index determination by micro interferometric reflection detection |
| FR2948192B1 (en) * | 2009-07-20 | 2011-07-22 | Commissariat Energie Atomique | OPTICAL CHARACTERIZATION METHOD |
| CN102156111B (en) * | 2011-05-18 | 2012-08-29 | 中国科学院上海光学精密机械研究所 | Device and method for measuring nonlinear refractive index coefficient of inert gas |
-
2012
- 2012-02-21 CN CN201210038182.2A patent/CN102590139B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202502049U (en) * | 2012-02-21 | 2012-10-24 | 中国工程物理研究院流体物理研究所 | Measuring device for refractive indexes of transparent fluids under high pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102590139A (en) | 2012-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103267743B (en) | A kind of apparatus for measuring refractive index and method | |
| CN103364371B (en) | The absorption coefficient of atmospheric aerosol Novel differential measurement method of coaxial-type photothermal interference | |
| CN103175634B (en) | Tdlas temperature calibration system | |
| KR20120029329A (en) | Measuring method of refractive index and measuring apparatus of refractive index | |
| CN107462405A (en) | Broadband differential confocal Infrared Lens element refractive index measurement method and device | |
| CN104655278B (en) | A wavelength calibrator | |
| CN102590139B (en) | Refractive index measuring device of transparent fluid under high pressure | |
| US9228937B2 (en) | Optical spectrometers | |
| Brientin et al. | Numerical and experimental study of a multimode optical fiber sensor based on Fresnel reflection at the fiber tip for refractive index measurement | |
| CN107152941A (en) | A kind of controllable optical fiber F P chamber constituent apparatus of chamber length | |
| CN103439294B (en) | Angle modulation and wavelength modulation surface plasmon resonance (SPR) sharing system | |
| CN201247048Y (en) | Thickness meter for optical film | |
| CN108225386A (en) | A kind of method that fibre-optical F-P sensor is made based on 800nm femto-second lasers | |
| CN203259473U (en) | Refractivity measuring device | |
| CN102636457A (en) | Trace liquid refractive index measuring system and measuring method | |
| CN110441259B (en) | Petal-shaped fiber bragg grating refractive index sensor and sensing method thereof | |
| CN202502049U (en) | Measuring device for refractive indexes of transparent fluids under high pressure | |
| CN205373934U (en) | Measure toughened glass surface stress's raman spectrometer | |
| CN108195483A (en) | A kind of fibre-optical F-P sensor production method for realizing temperature and strain measurement | |
| CN104749137B (en) | The measuring system and measuring method of liquid refractivity | |
| CN103868854A (en) | Optical system of multi-wavelength abbe refractometer | |
| Räty et al. | Inverse Abbe-method for observing small refractive index changes in liquids | |
| CN104390939A (en) | Sensor and method for detecting refractive index of liquid in micro-fluid system | |
| CN105738081A (en) | Apparatus for collimating optical path and detecting relative spectral transmittance and detection method thereof | |
| Liyun et al. | Optical fiber sensor determination of the water salinity based on surface plasmon resonance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20210221 |