CN107064061A - Super-resolution refractometer - Google Patents
Super-resolution refractometer Download PDFInfo
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- CN107064061A CN107064061A CN201610735875.5A CN201610735875A CN107064061A CN 107064061 A CN107064061 A CN 107064061A CN 201610735875 A CN201610735875 A CN 201610735875A CN 107064061 A CN107064061 A CN 107064061A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/4133—Refractometers, e.g. differential
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
A kind of distinguishable variations in refractive index is Δ n~2.0x10‑7The instrument of the measurement liquids and gases concentration of magnitude, the instrument includes super thick hollow metal-cladding waveguide, laser, ccd detector, the peristaltic pump and data display equipment for passing in and out and rinsing as sample, it is characterised in that：The ducting layer thickness of super thick hollow metal-cladding waveguide is about 5 millimeters, and 0 is approached by the minimum guide mode resonance angle of free space coupling0, make guided mode effective refractive index N → 0, so as to obtain great measurement sensitivity.The invention has the advantages that：The coupling elements such as prism are not needed, guided mode is directly excited using free space coupling；Testable sample ranges of indices of refraction is wide, both can be gas or liquid, unrestricted to the sample of high index of refraction；With close to 00Incidence angle excites guided mode as probe, with very big sensitivity；Signal is obtained using non-moving mode, sample refractive index minor variations can be learnt in real time, while being influenceed small by extraneous vibration.
Description
Technical field
The present invention relates to a kind of instrument for detecting solution or gas concentration change, belong to rigorous analysis and measuring instrument
Field.
Background technology
With the fast development of Chinese national economy, population is continuously increased, and environmental pollution has turned into the serious infringement people
The significant problem of health, increasing people are begun to focus in toxic and harmful gas in air, and rivers, lake and ocean
The water pollution of organic matter and heavy metal ion.Have important as one to the fine detection of levels of toxic substances in air and water
The problem of meaning.
Molecule structure change can all produce refraction caused by chemical reaction in the interaction of biomolecule and solution
The minor variations of rate, the detection of this minor variations is identification virus and the important means of different molecular.At present detection air and
The common method of material concentration has following several in water：Abbe refractometer cirtical angle of total reflection method, use spectrometer minimum partially
To horn cupping, Michelson interferometer Nonlocalized Fringes Produced by A, and atomic absorption method, AAS, atomic fluorescence spectrophotometry and efficiently
The technologies such as liquid chromatogram, sensitivity that these technologies have is not high, detection limit is low；Some light path adjustment are complicated, the measurement process time
It is long, it is unfavorable for measurement in real time；Or the equipment of Large expensive is needed, testing cost is high, it is difficult to popularization and application.
The content of the invention
This patent is for defect present in above technology, it is proposed that a kind of detectable variations in refractive index be Δ n~
2.0x10-7The measurement scheme of magnitude, the program uses a kind of new ducting layer thickness for 5mm super thick hollow metallic cover ripple
Guide structure.The characteristics of effective refractive index of this super thick waveguide most high order guided modes has N → 0.During experiment, laser is with close to 0
Degree angle is directly incident on the surface of waveguide (free-space coupling technology) and excites most high order guided modes in this waveguide.Because this is led
The absorption black line occurred by decay total reflection (ATR) is will appear from mode excitation, reflected light, reflection sample concentration (refractive index)
Black line is recorded by CCD.When sample concentration produces minor variations, the position of black line is with movement, so as to from mobile
The change of magnitude estimation concentration, or Δ n change.Sensitivity and effectively folding due to decay total reflection (ATR) absworption peak movement
The rate of penetrating is inversely proportional, therefore, and probe is used as using the guided mode of effective refractive index N → 0, it can be ensured that variations in refractive index is Δ n~2.0x10-7
The resolution ratio of magnitude.
Brief description of the drawings
Fig. 1 is hollow metal-cladding waveguide structural representation.
Fig. 2 ATR curve movements caused by Δ n~2.0 × 10-7 variations in refractive index.
This patent is achieved through the following technical solutions, and super-resolution refractometer device includes：Super thick hollow metal
Waveguide assemblies, photoemission and signal detection module are coated, is inputted for sample, required wriggling is cleaned in output and sample room
Pump group part C, the relative position of all elements is all fixed.
Hollow metal-cladding waveguide includes：Upper strata metal film, plate glass, sample room, glass seal, lower metal film,
The parts such as glass substrate, sample intake passage and sample output passage.Upper strata metal film deposition sinks in the surface of plate glass, lower metal film
Product is in the bottom surface of glass substrate.To ensure the depth of parallelism of waveguide cavity, first, glass seal requirement has the higher depth of parallelism；Secondly,
Together with plate glass, glass seal must use optical cement Technical form with glass substrate.Plate glass and glass seal up and down
Thickness sum is the thickness of ducting layer, and the thickness of glass seal is the thickness of sample room.Two are opened in glass substrate to lead to
Hole, is hollow metal-cladding waveguide structure A sample intake passage and sample output passage respectively, and testing sample enters sample by sample intake passage
Product pond, and waste sample is discharged by sample output passage.
Photoemission includes with signal detection module：Laser and CCD detection element.The directional light of laser transmitting is with one
Determine the surface that angle is incident in super thick hollow metal-cladding waveguide, reflected light is received by CCD detection element.
Inputted for sample, output and the required peristaltic pump component C of sample room cleaning include：Flexible pipe and peristaltic pump.
The present invention has advantages below：(1) with super thick hollow metal-cladding waveguide as sample room and resonant cavity, with height
Power density and high-quality-factor (Q values)；(2), can be true with high sensitivity using the guided mode of effective refractive index N → 0 as probe
Guarantor's variations in refractive index is Δ n~10-7The resolution ratio of magnitude；(3) sample both can be liquid and may also be gas；(4) simple in construction, behaviour
Make convenient, with low cost.
Claims (8)
1. the structure of super-resolution refractometer is as shown in figure 1, the structure is made up of three parts：Super thick hollow metal-cladding waveguide
Component A, photoemission and signal detection module B, for sample input, output and sample room cleaning needed for peristaltic pump component
C。
2. according to the super thick hollow metal-cladding waveguide component A of the requirement of right 1 by upper strata metal film 1, plate glass 2, sample room
3rd, the part such as glass seal 4, glass substrate 5, lower metal film 6, sample intake passage 7 and sample output passage 8 is constituted, it is characterised in that：
(1) upper strata metal film 1 is deposited on the surface of plate glass 2, and lower metal film 6 is deposited on the bottom surface of glass substrate 5, (2) flat board
Together with glass 2, glass seal 4 use optical cement Technical form with glass substrate 5, it is ensured that the depth of parallelism of waveguide cavity, (3) glass substrate
Two through holes are opened on 5, are super thick hollow metal-cladding waveguide structure A sample intake passage 7 and sample output passage 8, testing sample respectively
Sample cell is entered by sample intake passage 7, and waste sample is discharged by sample output passage 8.
3. according to the photoemission of the requirement of right 1 with signal detection module B by parts groups such as laser 9, CCD detection elements 10
Into, it is characterised in that：The light that laser 9 is launched is incident in super thick hollow metal-cladding waveguide structure A's with the angle close to 0 °
Surface, reflected light can ensure that when laser is close to 0 ° of incidence angle through projecting to CCD detection element 10 and excite a Ultra-High Order to lead
The decay total reflection absworption peak (being a black line on CCD) of a guided mode is included in mould, i.e. reflected light, the position of black line is determined
The concentration of sample, when sample concentration changes, the position of black line also changes, on CCD change in location be can determine that it is to be measured
The change of sample concentration, or refractive index change delta n.
4. according to the peristaltic pump component C being used for needed for sample input, output and sample room are cleaned of the requirement of right 1 by flexible pipe 11
Constituted with peristaltic pump 12, it is characterised in that：Sample or cleaning fluid input or exported sample room by flexible pipe 11 and peristaltic pump 12.
5. being silver according to the material of the structure top metal film 1 of the requirement of right 1, the thickness of upper strata metal film 1 is 36nm, flat board glass
The material of glass 2 is optical glass, and its thickness is 1mm, and the material of glass seal 4 is optical glass, and its thickness is about 3mm, lower floor
The material of metal film 6 is silver, and its thickness is about 200nm, and the material of glass substrate 5 is optical glass, and its thickness is 1mm, glass
Substrate 5 sample intake passage 7 and sample output passage 8 prepared above.
6. following feature is had according to the super thick hollow metal-cladding waveguide structure A of the requirement of right 1：Upper strata metal film 1 is deposited on
The surface of plate glass 2, lower metal film 6 is deposited on the bottom surface of glass substrate 5, plate glass 2, glass seal 4 and glass lined
With optical cement Technical form together, two through holes are opened in glass substrate 5, are super thick hollow metal-cladding waveguide structure A respectively in bottom 5
Sample intake passage 7 and sample output passage 8, testing sample enters sample room by sample intake passage 7, and waste sample passes through sample output passage
8 discharges.
7. it is collimated semiconductor laser 9 according to the photoemission of the requirement of right 1 and the light source in signal detection module B,
Its output wavelength is 650nm, and angle of divergence requirement is less than 0.3mrad.
8. it is line array CCD 10 according to the photoemission of the requirement of right 1 and the signal sensor in signal detection module B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610735875.5A CN107064061A (en) | 2016-08-26 | 2016-08-26 | Super-resolution refractometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610735875.5A CN107064061A (en) | 2016-08-26 | 2016-08-26 | Super-resolution refractometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107064061A true CN107064061A (en) | 2017-08-18 |
Family
ID=59617316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610735875.5A Pending CN107064061A (en) | 2016-08-26 | 2016-08-26 | Super-resolution refractometer |
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| Country | Link |
|---|---|
| CN (1) | CN107064061A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807108A (en) * | 2017-09-30 | 2018-03-16 | 复拓科学仪器（苏州）有限公司 | A kind of gas-liquid refractive index detection method and device of large-range high-resolution |
| CN108322085A (en) * | 2018-02-28 | 2018-07-24 | 复拓科学仪器（苏州）有限公司 | Piezoelectric ceramics nano-resolution displacement driver |
| CN110779693A (en) * | 2019-11-11 | 2020-02-11 | 四川大学 | Method for measuring refractive index of double-prism material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205374304U (en) * | 2015-05-08 | 2016-07-06 | 铜仁学院 | A waveguide that is arranged in drinking water trace manganese concentration detection |
| 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 |
-
2016
- 2016-08-26 CN CN201610735875.5A patent/CN107064061A/en active Pending
Patent Citations (2)
| 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 |
| CN205374304U (en) * | 2015-05-08 | 2016-07-06 | 铜仁学院 | A waveguide that is arranged in drinking water trace manganese concentration detection |
Non-Patent Citations (3)
| Title |
|---|
| TIAN XU等: "Enhanced Raman scattering assisted by ultrahigh order modes of the double metal cladding waveguide", 《APPLIED PHYSICS LETTERS》 * |
| 曹庄琪: "空芯金属包覆波导传感器特性及应用领域分析", 《江西师范大学学报( 自然科学版)》 * |
| 陈发祥: "空心金属包覆波导检测小球藻溶液浓度的研究", 《安徽农业科学》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807108A (en) * | 2017-09-30 | 2018-03-16 | 复拓科学仪器（苏州）有限公司 | A kind of gas-liquid refractive index detection method and device of large-range high-resolution |
| CN107807108B (en) * | 2017-09-30 | 2020-02-04 | 复拓科学仪器（苏州）有限公司 | Wide-range high-resolution gas-liquid refractive index detection method and device |
| CN108322085A (en) * | 2018-02-28 | 2018-07-24 | 复拓科学仪器（苏州）有限公司 | Piezoelectric ceramics nano-resolution displacement driver |
| CN110779693A (en) * | 2019-11-11 | 2020-02-11 | 四川大学 | Method for measuring refractive index of double-prism material |
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Application publication date: 20170818 |