CN102692392A - Device for measuring gas and liquid refractive indexes - Google Patents
Device for measuring gas and liquid refractive indexes Download PDFInfo
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- CN102692392A CN102692392A CN2011100745877A CN201110074587A CN102692392A CN 102692392 A CN102692392 A CN 102692392A CN 2011100745877 A CN2011100745877 A CN 2011100745877A CN 201110074587 A CN201110074587 A CN 201110074587A CN 102692392 A CN102692392 A CN 102692392A
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Abstract
A device for measuring gas and liquid refractive indexes. Parallel light emitted by a laser becomes a converged light spot through a convergence lens; a refractive index measuring sensor is disposed at a focus of the converged light spot with a certain incidence angle; a spot reflected by the refractive index measuring sensor is projected to a CCD imaging member through an acceptance lens. A sample to be measured enters a sample cell through a sample introduction channel, and a waste sample is discharged through a sample exiting channel. The invention has the following advantages: a metal film is used as a waveguide coating layer; a sample used as a waveguide layer has a wide refractive index range, can be gas or liquid; and samples with high refractive indexes are not limited. In addition, signals are obtained in a immobile mode, and thus a refractive index of a sample can be acquired in real time; and external vibration influence is less.
Description
Technical field
What the present invention relates to is a kind of refractometry system, particularly a kind of real-time refractometry system.Be used for rigorous analysis and surveying instrument field.
Background technology
Refractive index is one of basic optical character of transparent material.In production practices, the space distribution through measuring refractive index in the medium is with over time, and then qualitative analysis and even quantitatively definite other various related physical quantities, so the accurate measurement of refractive index has important and practical meanings.At present, the measuring method of refractive index is a lot, and commonly used has: (1) Abbe refractometer cirtical angle of total reflection method; The attenuated total reflection phenomenon that this method produces when mainly utilizing light from optically denser medium to optically thinner medium; The utilization refractive index that imaging system is come the quantitative test sample of looking in the distance, the principle of this method and implementation make that the refractive index of sample can not be greater than 1.7, the computing formula relative complex; The factor that causes error is more, and is therefore powerless to the sample measurement of high index of refraction (n＞1.7); (2) the minimum deviation horn cupping of use spectrometer; Though this method measuring accuracy is very high, also high to the requirement of testing sample, except need are processed into sample the prism; Also the machining precision to the sample prism has proposed higher requirement, is confined to the measurement of solid transparent object usually; (3) Michelson interferometer Using Nonlocalized Fringes Produced by A, this method are used for the continent amount of refractive index, only limit to thin transparency; And in measuring process; Because testing sample needs adjustment repeatedly with the measurement light path, thereby the light path adjustment is complicated, the measuring process time is long; Be unfavorable for real-time measurement, ambient environment vibrations can the refractive index measurement be brought very mistake simultaneously.
Find through retrieval, Chinese patent publication number: 1595121A, name is called: based on the optical waveguide biochemical sensor and the measuring system of free space coupling, proposed the biochemical sensor and the test macro of no prism-coupled in this patent of invention.This biochemical sensor is to be made up of upper strata metal film, upper strata optical glass, lower floor's optical glass, lower metal film from top to bottom; Testing sample is placed in the ducting layer; The optical waveguide biochemical sensor is fixed on the optics rotation platform, the laser beam incident waveguide biochemical sensor behind the collimation.This characteristic feature of an invention is: in the optical table rotary course, optical signalling is surveyed and is handled by the photoelectricity contact portion, thereby obtains the refractive index information of sample, and testing sample is in the high ducting layer of energy density, thereby has very high Measurement Resolution.But this sensor-based system must just can obtain the information of sample after motion scanning, therefore be not easy to quick, real-time sample analysis, and vibration signal is relatively more responsive to external world in addition.
Summary of the invention
The present invention is directed to the defective that exists in the above technology, propose a kind of real-time wide range refractometry system, on the direct incident sensor of converging beam, the reflected light scioptics are received by CCD.This scheme energy measurement gas and liquid refractive index, highly sensitive, Measuring Time is short, and is practical.
The present invention realizes that through following technical scheme apparatus for measuring refractive index of the present invention comprises: refractometry sensor and photoemission and acquisition of signal module.All relative positions are all fixed.
The refractometry sensor comprises: upper strata metal film, upper strata glass sheet, sample cell, lower floor's glass sheet, lower metal film, sample intake passage, sample output passage.The upper strata metal film deposition is on the optical glass sheet of upper strata, and lower metal film is deposited on lower floor's optical glass sheet.The metal film of upper strata optical glass sheet is towards last, and the metal film of upper strata optical glass sheet faces down.Upper strata optical glass sheet, sample cell, lower floor's optical glass sheet are assembled successively.Upper strata optical glass sheet, lower floor's optical glass sheet are clamped by upper strata metal film, lower metal film respectively; Be that upper strata metal film, upper strata optical glass sheet, sample cell and lower floor's optical glass, lower metal film constitute an optical waveguide, it is the ducting layer of optical glass sheet, sample cell and lower floor's optical glass sheet formation optical waveguide at the middle and upper levels.Having two ports on lower floor's optical glass, is respectively the sample intake passage and the sample output passage of refractometry sensor, and testing sample gets into sample cell through sample intake passage, and discarded sample is discharged through sample output passage.
Photoemission and acquisition of signal module comprise: laser instrument, plus lens, accept lens and CCD image-forming component.The directional light of laser instrument emission becomes behind plus lens and converges hot spot, and the refractometry sensor is placed on the along of focused light spot with certain incident angle, is accepted lens from refractometry sensor flare and projects to the CCD image-forming component.
The present invention has the following advantages:, wide with metal film as the sample ranges of indices of refraction of ducting layer as the waveguide clad, and both can be gas, also can be liquid, unrestricted to the sample of high index of refraction.Owing to adopt non-moving mode picked up signal, can learn the refractive index of sample in real time in addition, blown on one's face by the external world and the influence vibrated is also smaller.
Description of drawings
Fig. 1 refractometry system schematic of the present invention
Embodiment
As shown in the figure, the present invention is a kind of device that is used for gas, measuring refractive indexes of liquid, comprises two modules: refractometry sensor 1 and photoemission and acquisition of signal module 2.The refractometry sensor comprises: upper strata metal film 3, upper strata glass sheet 4, sample cell 5, lower floor's optical glass sheet 6, lower metal film 7, sample intake passage 8, sample output passage 9.Upper strata metal film 3 is deposited on the upper strata optical glass sheet 4, and lower metal film 7 is deposited on lower floor's optical glass sheet 6.The metal film of upper strata optical glass sheet 4 is towards last, and the metal film of lower floor's optical glass sheet 6 faces down.Upper strata optical glass sheet 4, sample cell 5, lower floor's optical glass sheet 6 are assembled successively.Upper strata optical glass sheet 4, lower floor's optical glass sheet 6 are clamped by upper strata metal film 3, lower metal film 7 respectively; Make upper strata metal film 3, upper strata optical glass sheet 4, sample cell 5 and lower floor's optical glass sheet 6, lower metal film 7 constitute an optical waveguide, it is the ducting layer of optical glass sheet 4, sample cell 5 and lower floor's optical glass sheet 6 formation optical waveguides at the middle and upper levels.Having two ports on lower floor's optical glass sheet 6, is respectively the sample intake passage 8 and sample output passage 9 of refractometry sensor, and testing sample gets into sample cell 5 through sample intake passage 8, and discarded sample is discharged through sample output passage 9.Photoemission and acquisition of signal module 2 comprise: laser instrument 10, plus lens 11, accept lens 12 and CCD image-forming component 13.The directional light of laser instrument 10 emission becomes behind plus lens and converges hot spot, and refractometry sensor 1 is placed on the along that converges hot spot with certain incident angle, is accepted lens 12 from refractometry sensor 1 flare and projects to CCD image-forming component 13.
Claims (5)
1. a real-time wide range refractometry system apparatus for measuring refractive index of the present invention comprises: refractometry sensor 1 photoemission and acquisition of signal module 2.
2. according to the refractometry sensor 1 in the real-time wide range refractometry system of right 1 requirement, comprising: upper strata metal film 3, upper strata glass sheet 4, sample cell 5, lower floor's optical glass sheet 6, lower metal film 7, sample intake passage 8, sample output passage 9.
3. have following characteristic according to the refractometry sensor 1 in the real-time wide range refractometry system of right 2 requirements: upper strata metal film 3 is deposited on the upper strata optical glass sheet 4, and lower metal film 7 is deposited on lower floor's optical glass sheet 6.The metal film of upper strata optical glass sheet 4 is towards last, and the metal film of upper strata optical glass sheet 4 faces down.Upper strata optical glass sheet 3, sample cell, lower floor's optical glass sheet 7 are assembled successively.Upper strata optical glass sheet 4,7 of lower floor's optical glass are clamped by upper strata metal film 3, lower metal film 6 respectively; Make upper strata metal film 3, upper strata optical glass sheet 4, sample cell 5 and lower floor's optical glass sheet 6, lower metal film 7 constitute an optical waveguide, it is the ducting layer of optical glass sheet 4, sample cell 5 and lower floor's optical glass sheet 6 formation optical waveguides at the middle and upper levels.Having two ports on lower floor's optical glass sheet 6, is respectively the sample intake passage 8 and sample output passage 9 of refractometry sensor 1, and testing sample gets into sample cell 5 through sample intake passage 8, and discarded sample is discharged through sample output passage 9.
4. photoemission and acquisition of signal module 2 in the real-time wide range refractometry system that requires according to right 1 comprise: laser instrument 10, plus lens 11, accept lens 12 and CCD image-forming component 13.
5. photoemission and acquisition of signal module 2 in the real-time wide range refractometry system that requires according to right 1 have following characteristic: the directional light that laser instrument 10 is launched becomes behind plus lens 11 and converges hot spot; Refractometry sensor 1 is placed on the along of focused light spot with certain incident angle, is accepted lens 12 from refractometry sensor 1 flare and projects to CCD image-forming component 13.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100745877A CN102692392A (en) | 2011-03-25 | 2011-03-25 | Device for measuring gas and liquid refractive indexes |
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| CN2011100745877A CN102692392A (en) | 2011-03-25 | 2011-03-25 | Device for measuring gas and liquid refractive indexes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749137A (en) * | 2015-04-07 | 2015-07-01 | 清华大学 | Liquid refractive index measurement system and method |
| CN105548093A (en) * | 2016-01-23 | 2016-05-04 | 宜春学院 | High-sensitivity oscillating field optical waveguide sensor |
| CN105572046A (en) * | 2014-10-16 | 2016-05-11 | 中国科学院物理研究所 | Fluorescence detection sample pool and preparation method thereof |
| CN105675542A (en) * | 2015-08-24 | 2016-06-15 | 温州大学 | Device and method for rapid identification of swill-cooked dirty oil |
| CN105891152A (en) * | 2014-10-01 | 2016-08-24 | 上海光刻电子科技有限公司 | Refractive index measurement method with wide range |
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| CN1595121A (en) * | 2004-06-24 | 2005-03-16 | 上海交通大学 | Optical waveguide biochemical sensor and measurement system based on free space coupling |
| CN1664560A (en) * | 2004-12-30 | 2005-09-07 | 南开大学 | Multiple channel surface plasma resonant image sensor based on-chip PCR |
| CN1696662A (en) * | 2005-06-09 | 2005-11-16 | 上海交通大学 | Light waveguide absorption type gas sensor and measuring system |
| CN101042341A (en) * | 2007-04-19 | 2007-09-26 | 上海交通大学 | Method for measuring solution concentration based on guided mode excitation Goos-Hanchen displacement enhancement effect |
| CN101074921A (en) * | 2006-05-18 | 2007-11-21 | 中国科学院化学研究所 | Multifunctional light-absorbing, scattering and transmitting spectrograph based on surface plasma wave |
| US7705990B2 (en) * | 2006-08-04 | 2010-04-27 | Agilent Technologies, Inc. | Optical sources for SPR applications |
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2011
- 2011-03-25 CN CN2011100745877A patent/CN102692392A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050030543A1 (en) * | 2001-10-19 | 2005-02-10 | Fuji Photo Film Co., Ltd. | Measuring method and apparatus using attenuation in total internal reflection |
| CN1595121A (en) * | 2004-06-24 | 2005-03-16 | 上海交通大学 | Optical waveguide biochemical sensor and measurement system based on free space coupling |
| CN1664560A (en) * | 2004-12-30 | 2005-09-07 | 南开大学 | Multiple channel surface plasma resonant image sensor based on-chip PCR |
| CN1696662A (en) * | 2005-06-09 | 2005-11-16 | 上海交通大学 | Light waveguide absorption type gas sensor and measuring system |
| CN101074921A (en) * | 2006-05-18 | 2007-11-21 | 中国科学院化学研究所 | Multifunctional light-absorbing, scattering and transmitting spectrograph based on surface plasma wave |
| US7705990B2 (en) * | 2006-08-04 | 2010-04-27 | Agilent Technologies, Inc. | Optical sources for SPR applications |
| CN101042341A (en) * | 2007-04-19 | 2007-09-26 | 上海交通大学 | Method for measuring solution concentration based on guided mode excitation Goos-Hanchen displacement enhancement effect |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105891152A (en) * | 2014-10-01 | 2016-08-24 | 上海光刻电子科技有限公司 | Refractive index measurement method with wide range |
| CN105572046A (en) * | 2014-10-16 | 2016-05-11 | 中国科学院物理研究所 | Fluorescence detection sample pool and preparation method thereof |
| CN105572046B (en) * | 2014-10-16 | 2018-06-26 | 中国科学院物理研究所 | Fluoroscopic examination sample cell and preparation method thereof |
| CN104749137A (en) * | 2015-04-07 | 2015-07-01 | 清华大学 | Liquid refractive index measurement system and method |
| CN104749137B (en) * | 2015-04-07 | 2017-09-22 | 清华大学 | The measuring system and measuring method of liquid refractivity |
| CN105675542A (en) * | 2015-08-24 | 2016-06-15 | 温州大学 | Device and method for rapid identification of swill-cooked dirty oil |
| CN105675542B (en) * | 2015-08-24 | 2018-09-28 | 温州大学 | A kind of device and method of quick identification gutter oil |
| CN105548093A (en) * | 2016-01-23 | 2016-05-04 | 宜春学院 | High-sensitivity oscillating field optical waveguide sensor |
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Application publication date: 20120926 |