CN2911670Y - Multiple optical fibers SPR probe having temp correction - Google Patents
Multiple optical fibers SPR probe having temp correction Download PDFInfo
- Publication number
- CN2911670Y CN2911670Y CNU2006200306003U CN200620030600U CN2911670Y CN 2911670 Y CN2911670 Y CN 2911670Y CN U2006200306003 U CNU2006200306003 U CN U2006200306003U CN 200620030600 U CN200620030600 U CN 200620030600U CN 2911670 Y CN2911670 Y CN 2911670Y
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- temperature
- prism
- face
- spr
- measured
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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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
- G01N21/8507—Probe photometers, i.e. with optical measuring part dipped into fluid sample
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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
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
- G01N21/553—Attenuated total reflection and using surface plasmons
Abstract
The utility model relates to a multi-fiber bundle SPR probe having a temperature correction, comprising a hemisphere type prism with an A u membrane on the surface. The end face of the hemisphere type prism is provided with two sets of fiber bundles which couples the end face of the prism in vertical direction; each set of the optical fiber is in a central symmetry in relation to the center of the circle of the prism end face; the sphere A u membranes opposite to the direction of the vertical end face of the two sets of fiber bundles are respectively solidified with a biochemistry sensitivity membrane and temperature sensitivity membrane. The temperature of the liquor to be measured and the concentration of the material to be measured are detected by the SPR in real time, then the impact arising from the temperature on the test result is corrected by substituting the observed temperature into the rectification model, effectively solving the problem that the temperature influences the stability and accuracy of the measured result, and improving the test sensitivity and precision of the concentration of the material to be measured. The utility model is easy to be carried and low in cost of manufacture, and importantly significant in the fields of the agricultural environment protection, the biomedicine and the foodstuff safety.
Description
Technical field
The utility model relates to a kind of many fibre bundles SPR probe that temperature correction is arranged, the difference that particularly has multi-optical fiber channel can be to temperature with to the SPR of measured object sensitivity probe, solved the stability and the measuring accuracy problem of the SPR detection that causes owing to temperature effectively, this many fibre bundles SPR probe with temperature correction has great importance in agricultural environmental protection, biomedicine and food security field.
Background technology
Surface plasma resonance (SPR) is the resonance wave that influences electromagnetic wave propagation that forms on metal and dielectric interface that electromagnetic wave encourages.Under the exciting of light wave, interface at metal and medium produces evanescent wave, when the wave vector of incident light equates along the wave vector of the component that is parallel to the interface direction with surface plasma-wave (SPW), evanescent wave causes the generation table and plasma resonance, therefore energy loss takes place in light in communication process, shows as some spectrum by strong absorption on macroscopic view.SPW is extremely responsive to the subtle change of the refractive index of medium.If allow sample contact with the coupling layer of sensor surface, owing to exist absorption or chemical reaction, the refractive index of sample changes.According to this principle, people have done widely on using and have inquired into, and have researched and developed out diversified optical SPR sensor, structurally can be divided into: prism-coupled formula spr sensor, optical fiber type spr sensor and grating manifold type spr sensor.Have only the lens type spr sensor to move towards market at present, but these products all have common weak point from the laboratory: volume is big, complex structure, not portable, price is high, particularly environment temperature is very big to the influence of measurement result.That has only the production of Bicore company at present has possessed temperature control based on prism-coupled formula spr sensor and analytical instrument, guarantee the temperature constant of sensor surface, and optical fiber SPR sensor is the test macro of an opening, can't be as prism-coupled formula spr sensor, the inner temperature controller that embeds.Therefore research and develop a kind of simple in structure, easy to carry, optical fiber probe and be easy to realize that the spr sensor of commercialization becomes the task of top priority with temperature correction.
The utility model content
It is a kind of simple in structure, easy to carry and be easy to realize the many fibre bundles SPR probe with temperature correction of commercialization that the utility model purpose is to provide.
To achieve these goals, the utility model adopts following technical scheme: a kind of multiple optical fiber probe with temperature correction, it has comprised the superficial growth dome-type prism of Au film, the end face of dome-type prism is provided with two groups of fibre bundles that are coupled in the prism end face in vertical direction, every group of optical fiber respectively is solidified with biological chemistry sensitive membrane and responsive to temperature film on the sphere Au film of correspondence all about prism end face centre of sphere symmetry on the direction of two groups of fibre bundle perpendicular end surface.
The thickness of described Au film, biological chemistry sensitive membrane and responsive to temperature film is 30～100nm.
Described fibre bundle is encapsulated in the stainless steel sleeve pipe, fibre bundle lower end and prism end face bonding.
The utility model provides a kind of many fibre bundles SPR probe with temperature correction based on the SPR technology, and this fibre-optical probe is by sensitive membrane, responsive to temperature film and two groups of composite structures that fibre bundle is formed of the dome-type prism that is coated with the Au film, sample.On the prism surface of dome-type, layer of Au film is set, prism end face and fibre bundle are bonding, fibre bundle is encapsulated in the stainless steel sleeve pipe, only growth is had the dome-type prism of pair temperature and measured object sensitive membrane to be exposed in the tested liquid, has constituted the composite S PR probe with temperature correction.Can utilize the SPR principle to realize the temperature detected with high accuracy, realize the detected with high accuracy of measured matter concentration.Detect the temperature of liquid to be measured and the concentration of measured matter in real time by SPR, go the influence of Tc by observed temperature substitution calibration model then to test result, solved effectively in the optical fiber SPR sensor application, owing to temperature influences the stability of measurement result and the problem of measuring accuracy, improve the measurement sensitivity and the degree of accuracy of measured matter concentration.It is easy to carry about with one, and low cost of manufacture has great importance in agricultural environmental protection, biomedicine and food security field.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a right view of the present utility model;
Fig. 3 is a vertical view of the present utility model.
Embodiment
Embodiment: multiple optical fiber probe as Figure 1-3 with temperature correction, on the arc-shaped surface of the prism 5 of dome-type, be coated with Au film 6, have two groups of fibre bundles 1,2 and 3,4 to be coupled on the end face of prism 5 in vertical direction, sphere place corresponding on the direction of two groups of fibre bundle perpendicular end surface is provided with biological chemistry sensitive membrane 7 and responsive to temperature film 10 respectively.Two groups of fibre bundles, be in respectively on prism 5 end faces on two groups of light incidence points and the light reflection spot position, wherein one group of fibre bundle 1,2 is used for the SPR detection of temperature signal and the conduction of light wave, and another group fibre bundle 3,4 is used to survey the SPR relevant information of test substance and the conduction of light wave.
1 is thermometric incident light fibre bundle among the figure, the 2nd, and thermometric reflected light fibre bundle, the 3rd, the reflected light fibre bundle that target analytes is measured, the 4th, the incident light fibre bundle that target analytes is measured, the 5th, dome-type prism, the 6th, Au film, the 7th, biological chemistry sensitive membrane, the 8th, target analytes solution.
When a branch of wideband light source of handling through polaroid is coupled into temperature survey fibre bundle 1, and conduct to Au film 6 places through prism 5, specific wavelength excites the generation surface plasma-wave, and the variation along with the concentration of measured object produces surface plasma resonance.The SPR spectral information that is conducted in analysis through mirror based fiber optica 2, plasma resonance wavelength as can be known, and there are corresponding relation in resonant wavelength and liquid medium refractive index, there are certain linear in liquid medium 8 refractive indexes and fluid temperature, realize mensuration in view of the above to temperature, substitution SPR temperature correction model, and then the correction of realization temperature.Another beamwidth light source conducts to biological chemistry sensitive membrane 7 through another group incident optical bundle 4, excite and produce the surface plasma resonance ripple, the concentration and the character of the target analytes that resonant wavelength and refractive index and biological chemistry sensitive membrane are touched have corresponding relation, analyze mirror based fiber optica 3 and conduct the SPR spectral information that, can measure the concentration of target analytes.
Claims (3)
1, a kind of multiple optical fiber probe with temperature correction, it is characterized in that: it comprises that a surface is provided with the dome-type prism of Au film, the end face of dome-type prism is provided with two groups of fibre bundles that are coupled in the prism end face in vertical direction, every group of optical fiber respectively is solidified with biological chemistry sensitive membrane and responsive to temperature film on the sphere Au film of correspondence all about prism end face centre of sphere symmetry on the direction of two groups of fibre bundle perpendicular end surface.
2, the multiple optical fiber probe with temperature correction according to claim 1 is characterized in that: the thickness of described Au film, biological chemistry sensitive membrane and responsive to temperature film is 50nm.
3, according to arbitrary described multiple optical fiber probe with temperature correction of claim 1-2, it is characterized in that: described fibre bundle is encapsulated in the stainless steel sleeve pipe, fibre bundle lower end and prism end face bonding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200306003U CN2911670Y (en) | 2006-07-06 | 2006-07-06 | Multiple optical fibers SPR probe having temp correction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200306003U CN2911670Y (en) | 2006-07-06 | 2006-07-06 | Multiple optical fibers SPR probe having temp correction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2911670Y true CN2911670Y (en) | 2007-06-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200306003U Expired - Fee Related CN2911670Y (en) | 2006-07-06 | 2006-07-06 | Multiple optical fibers SPR probe having temp correction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2911670Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620760A (en) * | 2012-04-05 | 2012-08-01 | 陈云钦 | Optical fiber probe and composite type liquid optical fiber concentration meter employing optical fiber probe |
-
2006
- 2006-07-06 CN CNU2006200306003U patent/CN2911670Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620760A (en) * | 2012-04-05 | 2012-08-01 | 陈云钦 | Optical fiber probe and composite type liquid optical fiber concentration meter employing optical fiber probe |
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Legal Events
| 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 |