CN203287317U - Optical fiber sensing device of a fluorescence method - Google Patents
Optical fiber sensing device of a fluorescence method Download PDFInfo
- Publication number
- CN203287317U CN203287317U CN2013203406304U CN201320340630U CN203287317U CN 203287317 U CN203287317 U CN 203287317U CN 2013203406304 U CN2013203406304 U CN 2013203406304U CN 201320340630 U CN201320340630 U CN 201320340630U CN 203287317 U CN203287317 U CN 203287317U
- Authority
- CN
- China
- Prior art keywords
- fluorescence
- optical fiber
- pass filter
- transmission fibers
- sensing device
- 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, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The utility model relates to an optical fiber sensing device of a fluorescence method. The optical fiber sensing device of the fluorescence method comprises an LED light source, a coupling lens, a short-wave pass filter, a transmission optical fiber, a fluorescence sensing material, a photoelectric detector. Light emitted by the LED light source is coupled with the input end of the transmission optical fiber through the coupling lens. The short-wave pass filter is arranged between the coupling lens and the transmission optical fiber and forms an approximate angle of 45 degrees with the center axis of the coupling lens. The fluorescence sensing material is directly arranged on an output end face of the transmission optical fiber. Light output by the output end of the transmission optical fiber is cast on the fluorescence sensing material. Emitted fluorescent light is received by the output end of the transmission optical fiber, output by the input end of the optical fiber, reflected by the short-wave pass filter and received by the photoelectric detector. Physical or chemical parameters, including concentration, of matter which acts on the fluorescence sensing material can be detected by measuring intensity of the received fluorescence light.
Description
Technical field
[0001] the utility model belongs to the photoelectric sensing field, and particularly a kind of the affect effect of different material on fluorescence spectrum of utilizing, and employing optical fiber is realized the fluorescence method fibre-optical sensing device that physics or the chemical property of material are surveyed as the light signal medium.
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), and the advantages such as corrosion-resistant and high temperature, therefore, be specially adapted to the sensing detection in crawl space and rugged surroundings.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of single transmission optical fiber that adopts not only as light source but also as the Transmission Fibers of the fluorescence that is excited, and the fluorescence inductive material is set directly on an end face of Transmission Fibers, make the simple in structure of sensing device, the size of sensing head is little, is specially adapted to the sensing detection of crawl space.Low-loss characteristics due to optical fiber, 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 sensing device, 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, described fluorescence inductive material is set directly on the output end face of described Transmission Fibers, 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 described Transmission Fibers is a kind of single mode or multimode optical fiber.
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 sensing device adopts single transmission optical fiber not only as light source but also as the Transmission Fibers of the fluorescence that is excited, and the fluorescence inductive material is set directly on an end face of Transmission Fibers, make the simple in structure of sensing device, the size of sensing head is little, is specially adapted to crawl space and remote sensing detection.
2. this fluorescence method fibre-optical sensing device, 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 input port 12 of Transmission Fibers 14, and shine on the fluorescence inductive material 18 on output port 16 surfaces that are set directly at Transmission Fibers 12 after output port 16 outputs of Transmission Fibers 12, the fluorescence that fluorescence inductive material 18 produces is a kind of light of dispersing, the output port 16 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.Be set directly at the surface of the output port 16 of Transmission Fibers 12 due to fluorescence inductive material 18, only need to cover the output end face of optical fiber, therefore, sensing head small-sized.Transmission Fibers 14 as required, can adopt multimode or single-mode fiber.Usually short wave-pass filter 10 is arranged to become about miter angle with the axis of coupled lens 6.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 large photodetector of selective reception Area comparison, be conducive to strengthen the fluorescence intensity that receives.Fig. 2 is that a centre wavelength is λ
p, the half width of spectrum is △ λ
pThe spectrum schematic diagram of LED light source 2. the output spectrum of LED light source is much wider than the output spectrum of semiconductor laser usually, the half width △ λ 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 sensing device. for different fluorescence inductive materials, and the half width △ λ of fluorescence spectrum
fBe tens to the hundreds of nanometer, central wavelength lambda
fCentral wavelength lambda than the light source that is used for fluorescence excitation
pLong tens to the hundreds of nanometer.Fig. 4 is the transmitted spectrum schematic diagram of short wave pass filter 10.The function of short wave pass filter 10 will make light beam 8 all to see through exactly, and makes the fluorescent light beam of being sent by port one 2 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 itself has the gradient of a wavelength variations 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.
Innovative point 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, and the fluorescence inductive material is set directly on an end face of Transmission Fibers, make the simple in structure of sensing device, the size of sensing head is little, is specially adapted to the sensing detection of crawl space.Low-loss characteristics due to optical fiber, can realize remote sensing detection.
Claims (5)
1. fluorescence method fibre-optical sensing device, 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, described fluorescence inductive material is set directly on the output end face of described Transmission Fibers, 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 sensing device 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 sensing device 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 sensing device according to claim 1, it is characterized in that: described Transmission Fibers is a kind of single mode or multimode optical fiber.
5. a kind of fluorescence method fibre-optical sensing device 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 |
|---|---|---|---|
| CN2013203406304U CN203287317U (en) | 2013-06-14 | 2013-06-14 | Optical fiber sensing device of a fluorescence method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203406304U CN203287317U (en) | 2013-06-14 | 2013-06-14 | Optical fiber sensing device of a fluorescence method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203287317U true CN203287317U (en) | 2013-11-13 |
Family
ID=49543673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203406304U Expired - Fee Related CN203287317U (en) | 2013-06-14 | 2013-06-14 | Optical fiber sensing device of a fluorescence method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203287317U (en) |
-
2013
- 2013-06-14 CN CN2013203406304U patent/CN203287317U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102914519B (en) | Optical fiber type laser liquid turbidity measuring device and measuring method | |
| CN202230024U (en) | Fluorescence enhancement type optical fiber fluorescent probe | |
| CN103808692B (en) | The strength investigation type sensor of a kind of Mach-Zehnder interferometer and microcavity cascade | |
| CN204203101U (en) | A kind of dissolved oxygen DO pick-up unit based on fluorescence analysis and system | |
| CN104165684B (en) | Surface plasmon resonance-based supersensitive hydrophone | |
| CN104215610A (en) | Plasma resonance chamber-based fiber surface plasma sensor | |
| CN103837520A (en) | Optic travelling wave cavity enhanced laser raman gas concentration detection device | |
| CN105223181A (en) | A kind of fluorescence detection device | |
| CN105044030A (en) | Coupling refractive index meter for evanescent field among optical fibers and detecting method of coupling refractive index meter | |
| CN103969221A (en) | Optical fiber refractive index sensor based on single mode-fine core-multimode-single mode structure | |
| CN109490235A (en) | Spectrographic detection type gas sensor based on optical fiber Sagnac ring and optical fiber FP chamber cascade enhanced sensitivity | |
| CN203672786U (en) | Dual-wavelength-modulation photoelectric detection device for trace materials | |
| CN108398244A (en) | Optical fiber laser parameter real-time measuring device based on inclined fiber bragg grating | |
| CN105548023A (en) | Evanescent-wave type photoacoustic spectrum trace gas sensor based on optical fiber resonant cavity and measurement method | |
| CN113721173A (en) | Optical fiber SERF atomic magnetometer device based on reflection type bidirectional pumping | |
| CN105044033A (en) | Intensity-demodulation optical fiber gas sensing device | |
| CN205038162U (en) | Fluorescence detection device | |
| CN203287318U (en) | Optical fiber sensing device of fluorescence method | |
| CN104251848A (en) | Fluorescence method optical fiber sensor | |
| CN203287027U (en) | A fluorescence method fiber sensor | |
| CN104237179A (en) | Optical fiber sensing equipment by fluorescence method | |
| CN104236604A (en) | Fluorescence method optical fiber sensor | |
| CN204462021U (en) | Fluorescence analyser | |
| CN203811538U (en) | Mach-Zehnder interferometer and microcavity cascaded intensity detection type sensor | |
| CN104502278A (en) | Gas chamber of optic fiber gas sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20131113 Termination date: 20170614 |