CN203287027U - A fluorescence method fiber sensor - Google Patents
A fluorescence method fiber sensor Download PDFInfo
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- CN203287027U CN203287027U CN2013203406319U CN201320340631U CN203287027U CN 203287027 U CN203287027 U CN 203287027U CN 2013203406319 U CN2013203406319 U CN 2013203406319U CN 201320340631 U CN201320340631 U CN 201320340631U CN 203287027 U CN203287027 U CN 203287027U
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- fluorescence
- pass filter
- wave pass
- light source
- transmission fibers
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Abstract
The utility model relates to a fluorescence method fiber sensor comprising a LED light source, a coupling lens, a short-wave pass filter, a transmission fiber, a fluorescence induction material, and a photoelectric detector. Light emitted by the LED light source passes through the coupling lens to be coupled to the input end of the transmission fiber. The short-wave pass filter is arranged between the short-wave pass filter and the transmission fiber. An angle about 45 degree is formed between the short-wave pass filter and the central axis of the short-wave pass filter. Light outputted by the output end of the transmission fiber is irradiated on the fluorescence induction material. Emitted fluorescence is received by the output end of the transmission fiber. Outputted by the input end of the transmission fiber, the emitted fluorescence is reflected by the short-wave pass filter and then is received by the photoelectric detector. Physical or chemical parameters, such as the concentration of substance acted on the fluorescence induction material, can be detected by measuring the intensity of the received fluorescence.
Description
Technical field
The utility model belongs to the photoelectric sensing field, a kind of the affect effect of different material on fluorescence spectrum of utilizing particularly, and adopt optical fiber to realize the physics of material or chemical property are surveyed as the light signal medium
GlimmeringLight method Fibre Optical Sensor.
Background technology
The fluorescence method sensing principle is connecting together with the molecule that can identify some detected parameters the fluorescence inductive material that is formed for sensing by chemical method by fluorescigenic molecule.Usually the fluorescence inductive material is coated on a transparent material, make it produce certain fluorescence with a light source with certain bandwidth through transparent material deexcitation fluorescence inductive material, when detected material is present in detected sample,, by detected material and identification interaction of molecules, cause cancellation or the enhancing of fluorescence.Fluorescence intensity is just relevant with the concentration of measured matter.Just can calculate the content of measured matter by measuring fluorescence intensity.Due to the development of modern optical fiber technology, make the loss of the transmission of light in optical fiber greatly reduce, therefore, adopt optical fiber to come the transmission sensing light signal can realize remote sensing detection.In addition, optical fiber also has volume little, and is lightweight, and light signal is not subjected to electromagnetic interference (EMI), the advantages such as corrosion-resistant and high temperature.
Summary of the invention
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of simple in structure, size is little, and cost is low, adopt single transmission optical fiber not only as light source but also as the Transmission Fibers of the fluorescence that is excited, make the simple in structure of sensor and can realize remote sensing detection.
The utility model solves its technical matters and realizes by the following technical solutions:
a kind of fluorescence method Fibre Optical Sensor, comprise LED light source, coupled lens, short wave pass filter, Transmission Fibers, the fluorescence inductive material, photodetector, the light that described LED light source sends is coupled to the input end of described Transmission Fibers by described coupled lens, described short wave pass filter is placed between described coupled lens and described Transmission Fibers, and with the central axis of described coupled lens, become about miter angle, the illumination of at the output terminal of described Transmission Fibers, exporting is mapped on described fluorescence inductive material, the fluorescence that sends is received by the output terminal of described Transmission Fibers, and after the input end output by this optical fiber, reflected by described short wave pass filter, and by described photodetector, received, power by measuring received fluorescence can the material of detection effect on described fluorescence inductive material physics or the chemical parameters such as concentration.
And the centre wavelength of described LED light source is shorter than the wavelength of fluorescence that fluorescence inductive material sends.
And described short wave pass filter has high permeability to the light that described LED light source sends; Described short wave pass filter has high reflectance to the fluorescence that described fluorescence inductive material sends.
And the distance of the output terminal of described Transmission Fibers and described fluorescence inductive material can be regulated.
And the fluorescence spectrum that described photodetector and described fluorescence inductive material send has essentially identical spectral range.
Advantage of the present utility model and beneficial effect are:
1. this fluorescence method Fibre Optical Sensor adopts single transmission optical fiber not only as light source but also as the Transmission Fibers of the fluorescence that is excited, and makes the simple in structure of sensor and can realize remote sensing detection.
2. this fluorescence method Fibre Optical Sensor, simple for structure, and size is little, and is reasonable in design, and cost is low.
Description of drawings
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is the output spectrum schematic diagram of LED light source;
Fig. 3 is the fluorescence spectrum schematic diagram that the fluorescence inductive material sends;
Fig. 4 is the transmitted spectrum schematic diagram of short wave pass filter.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.
Fig. 1 is a schematic diagram of the present utility model, the light beam 4 that LED light source 2 sends is focused on by coupled lens 6, see through short wave-pass filter 10, be coupled in the port one 2 of Transmission Fibers 14, and shine on fluorescence inductive material 18 after port one 6 outputs of Transmission Fibers 12, the fluorescence that fluorescence inductive material 18 produces is a kind of light of dispersing, the port one 6 that its part reflected fluorescent light is transmitted optical fiber 12 receives, and, by port one 2 outputs, received by photodetector 22 after short wave-pass filter 10 reflections.Only a kind of diverging light due to port one 6 outputs from Transmission Fibers 14, its angle of divergence depends on the factors such as numerical aperture of Transmission Fibers 14, therefore, the port one 6 of Transmission Fibers 14 can have influence on the distance of fluorescence inductive material 18 spot size that is mapped to the light beam of fluorescence inductive material 18 by the illumination of port one 6 outputs.Similarly, the fluorescence that fluorescence inductive material 18 produces is a kind of light of dispersing, and the port one 6 of Transmission Fibers 14 also can have influence on port one 6 with the distance of fluorescence inductive material 18 and receive the intensity of fluorescence signal, so this distance can be regulated as required.Usually, short wave-pass filter 10 is arranged to the axis of coupled lens 6, become about miter angle.The fluorescent light beam of sending from port one 2 is a kind of light of dispersing, after short wave-pass filter 10 reflections, fluorescent light beam 20 is also a kind of light of dispersing, therefore, the receiving area of photodetector 22 and photodetector 22 all can affect the fluorescence intensity that photodetector 22 receives with the distance of short wave-pass filter 10.Therefore; should photodetector 22 be placed on the position near short wave-pass filter 10 as far as possible; and the photodetector that the selective reception Area comparison is large, be conducive to strengthen the fluorescence intensity that receives, and by fluorescence intensity, can Transmission Fibers 14 can adopt single mode or multimode optical fiber.Fig. 2 is that a centre wavelength is lp, and the half width of spectrum is Dl
pThe spectrum schematic diagram of LED light source 2. general, the output spectrum of LED light source is much wider than the output spectrum of semiconductor laser, the half width Dl of spectrum
pCan be from several nanometers to tens nanometers, the angle of divergence of output is also very large, must with coupled lens could be effectively with the light beam coupling of LED light source in optical fiber.Fig. 3 is the fluorescence spectrum schematic diagram that adopts in the fluorescence method sensor. for different fluorescence inductive materials, the half width Dl of fluorescence spectrum
fBe tens to the hundreds of nanometer, centre wavelength
l
fArrive the hundreds of nanometer than the centre wavelength lp of the light source that is used for fluorescence excitation long tens.Fig. 4 is the transmitted spectrum schematic diagram of short wave pass filter 10.The function of short wave pass filter 10 is exactly to make the light beam 8 that is sent by light source 2 all to see through, and makes the fluorescent light beam by port one 2 outputs all to reflect.In actual applications, due to the optical insertion loss of optical filter 10 own, the light and the reflected light that see through through optical filter 10 all can have some losses.In addition, optical filter 10 transmitted spectrums itself have the gradient of a wavelength from the full impregnated to the total reflection, and the width of the spectral width of light source 2 and fluorescence spectrum, part fluorescence may see through filter plate, the light of part light source 2 may be reflected, the several factors that should consider when these are actual design optical filter 10.
Innovation of the present utility model is: adopt single transmission optical fiber not only as light source but also as the Transmission Fibers of the fluorescence that is excited, make the simple in structure of sensor, size is little, and cost is low.Low-loss characteristics due to optical fiber, can realize remote sensing detection.
Claims (5)
1. fluorescence method Fibre Optical Sensor, comprise LED light source, coupled lens, short wave pass filter, Transmission Fibers, the fluorescence inductive material, photodetector, the light that described LED light source sends is coupled to the input end of described Transmission Fibers by described coupled lens, described short wave pass filter is placed between described coupled lens and described Transmission Fibers, and with the central axis of described coupled lens, become about miter angle, the illumination of at the output terminal of described Transmission Fibers, exporting is mapped on described fluorescence inductive material, the fluorescence that sends is received by the output terminal of described Transmission Fibers, and after the input end output by this optical fiber, reflected by described short wave pass filter, and by described photodetector, received, power by measuring received fluorescence can the material of detection effect on described fluorescence inductive material physics or the chemical parameters such as concentration.
2. a kind of fluorescence method Fibre Optical Sensor according to claim 1, it is characterized in that: the centre wavelength of described LED light source is shorter than the wavelength of fluorescence that fluorescence inductive material sends.
3. a kind of fluorescence method Fibre Optical Sensor according to claim 1, it is characterized in that: described short wave pass filter has high permeability to the light that described LED light source sends; Described short wave pass filter has high reflectance to the fluorescence that described fluorescence inductive material sends.
4. a kind of fluorescence method Fibre Optical Sensor according to claim 1, it is characterized in that: the distance of the output terminal of described Transmission Fibers and described fluorescence inductive material can be regulated.
5. a kind of fluorescence method Fibre Optical Sensor according to claim 1, it is characterized in that: the fluorescence spectrum that described photodetector and described fluorescence inductive material send has essentially identical spectral range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203406319U CN203287027U (en) | 2013-06-14 | 2013-06-14 | A fluorescence method fiber sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203406319U CN203287027U (en) | 2013-06-14 | 2013-06-14 | A fluorescence method fiber sensor |
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| CN203287027U true CN203287027U (en) | 2013-11-13 |
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| CN2013203406319U Expired - Fee Related CN203287027U (en) | 2013-06-14 | 2013-06-14 | A fluorescence method fiber sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236604A (en) * | 2013-06-14 | 2014-12-24 | 天津奇谱光电技术有限公司 | Fluorescence method optical fiber sensor |
| CN106018278A (en) * | 2016-07-11 | 2016-10-12 | 上海爱涛信息科技有限公司 | Miniaturized photoelectric module for fluorescence detection |
-
2013
- 2013-06-14 CN CN2013203406319U patent/CN203287027U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236604A (en) * | 2013-06-14 | 2014-12-24 | 天津奇谱光电技术有限公司 | Fluorescence method optical fiber sensor |
| CN106018278A (en) * | 2016-07-11 | 2016-10-12 | 上海爱涛信息科技有限公司 | Miniaturized photoelectric module for fluorescence detection |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20170614 |
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| CF01 | Termination of patent right due to non-payment of annual fee |