CN201210045Y - Optical fiber detection device - Google Patents
Optical fiber detection device Download PDFInfo
- Publication number
- CN201210045Y CN201210045Y CNU2008200939433U CN200820093943U CN201210045Y CN 201210045 Y CN201210045 Y CN 201210045Y CN U2008200939433 U CNU2008200939433 U CN U2008200939433U CN 200820093943 U CN200820093943 U CN 200820093943U CN 201210045 Y CN201210045 Y CN 201210045Y
- Authority
- CN
- China
- Prior art keywords
- sample
- optical fiber
- optical
- input end
- module
- 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 - Lifetime
Links
Images
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model discloses an optical fiber detecting device, comprising a light source component, a light splitter, a reference reflecting module, a sample scanning module, a photodetector and a signal processing analyzer. The optical fiber to be detected is arranged in the sample scanning module; the light splitter is provided with an input end, a reference beam output-input end, a sample beam output-input end and an interference light output end; the light source component is optically connected with the input end of the light splitter; the reference beam output-input end of the light splitter is optically connected with the reference reflecting module; the reference reflecting module is used for receiving a reference beam and generating a reference reflecting beam with variable optical distances; the sample beam output-input end of the light splitter is optically connected with the sample scanning module which is used for leading the received sample beam to scan the optical fiber to be detected and generating a sample reflecting beam; the interference light output end of the splitter is optically connected with the input end of the photodetector; and the output end of the photodetector is coupled with the input end of the signal processing analyzer. The optical fiber detecting device can carry out high-resolution detection without contact and damage to geometric parameters of the internal structure of the optical fiber.
Description
[technical field]
The utility model is involved in the optical fiber detection range, is specifically related to the optical fiber detector that a kind of non-contact type is interfered form.
[background technology]
At present optical fiber has been widely used in fields such as communication, sensing, medical treatment, military affairs, increasingly extensive along with fiber optic applications, and (as military, medical treatment) is more and more higher to the quality requirements of optical fiber in some fields.The typical structure of optical fiber is the multilayer coaxial clyinder, generally be divided into three layers, it is followed successively by fibre core, covering and coat from inside to outside: the center is the fibre core (the single mode core diameter is generally 9 μ m) of high index of refraction, the centre is that the covering of low-refraction (diameter is generally 125 μ m), outermost are the coats of strengthening usefulness.The core of optical fiber is fibre core and covering, and wherein, fibre core is made by the material of highly transparent, is the main transmission channel of light wave, and the refractive index of covering is slightly less than fibre core, makes the transmission performance of light relatively stable.The refractive index of the thickness of fibre core, core material and clad material plays decisive influence to the characteristic of optical fiber.Dimensional parameters is the most basic normalizing parameter of optical fiber.Except influential to performances such as the light transmission of optical fiber, machineries, dimensional parameters also plays crucial effects to the size of the junction loss of optical fiber.For example, single fiber continues, and then to require to be connect the fiber core dimensional parameters identical, and the reference that aim at as fibre core with the optical fiber external diameter is so require the external diameter of optical fiber to answer uniformity.
The test of basic parameter is the assurance to the optical fiber cable quality, and is all very important to the manufacturing and the application of optical fiber.At present optical fiber detecting method generally there are magnifier direct observational method, microscopic examination method and laser scanning method.The magnifier observation can only be rough the situations such as smooth finish, cut of understanding fiber end face, be difficult to the geometric parameter of the optical fiber surveyed.The microscopic examination method, though end face situation that can detection fiber when the measuring optical fiber geometric parameter, requires very highly to the cutting of fiber end face and polishing, and this method needs cutting optical fibre, diminishes optical fiber like this.The measuring accuracy height of laser scanning method, but the external diameter that it can only measuring optical fiber, and the inside of very difficult detection fiber defectiveness whether.
[summary of the invention]
Fundamental purpose of the present utility model solves the problems of the prior art exactly, and a kind of noncontact, undamaged optical fiber detector are provided, and can carry out high-resolution detection to the geometric parameter of inside of optical fibre.
For achieving the above object, the utility model provides a kind of optical fiber detector, it is characterized in that, comprise light source assembly, optical splitter, with reference to reflecting module, the sample scan module, photodetector and signal processing analysis device, testing fiber places in the described sample scan module, described optical splitter has input end, reference beam is come in and gone out and is held, sample beam is come in and gone out and is held and the interference light output terminal, described light source assembly is connected with the input end optics of described optical splitter, the reference beam of described optical splitter is come in and gone out to hold and is connected with reference to reflecting module optics with described, the described reference folded light beam that receives reference beam and produce change in optical path length of being used to reference to reflecting module, the sample beam of described optical splitter is come in and gone out to hold and is connected with described sample scan module optics, the sample beam that described sample scan module is used for receiving scans and produces the sample folded light beam to testing fiber, the interference light output terminal of described optical splitter is connected with the input end optics of described photodetector, and the output terminal of described photodetector is electrically coupled to the input end of described signal processing analysis device.
Preferably, the described reference mirror scanister and first drive unit that comprises reference mirror, can move back and forth with reference to reflecting module, described reference mirror is fixed on the described reference mirror scanister, described reference mirror is used for receiving reference beam and producing the reference folded light beam of change in optical path length in the process that moves with described reference mirror scanister, and the clutch end of described first drive unit is coupled to described reference mirror scanister.
Described first drive unit is selected from piezoelectric ceramic devices, motorized precision translation stage, vibrating motor and voice coil motor.
Describedly comprise reference mirror and optical scan vibration lens with reference to reflecting module, described optical scan vibration lens be used to receive reference beam and with its scanning at reference mirror.
Described sample scan module comprises sample fixed station and optical scan vibration lens, and testing fiber places on the described sample fixed station, and described optical scan vibration lens is used to receive sample beam and it is scanned at testing fiber.
Described sample scan module comprises that movably sample is regulated the platform and second drive unit, testing fiber places described sample to regulate on the platform, the clutch end of described second drive unit is coupled to described sample regulates platform, and described sample adjusting platform is used to drive testing fiber makes it accept the scanning of sample beam.
Also comprise condenser and collimating apparatus, come in and go out end and of the reference beam that described condenser is arranged on described optical splitter with reference between the reflecting module, be used for being sent to after the reference beam gathering described with reference to reflecting module, described collimating apparatus is arranged on the sample beam of described optical splitter and comes in and goes out between end and the sample scan module, is sent to described sample scan module after the beam collimation that is used for penetrating from described optical splitter becomes directional light.
Described light source assembly is low relevant super-radiance light emitting diode light source or femto-second laser.
Described optical splitter is the fiber coupler of 50%:50% for dividing optical mode.
The described output terminal that is successively set on described photodetector and amplifying circuit, filtering circuit and the detecting circuit between the described signal processing analysis device input end of also comprising.
The beneficial effects of the utility model are:
The utility model will detect light beam by optical splitter and be divided into reference beam and sample beam, by the reference reflecting module, utilize reference beam to produce the reference folded light beam of change in optical path length, by the sample scan module, utilize sample beam to produce testing fiber is scanned the sample folded light beam that the back produces, and further by superposeing at the optical splitter place with reference to folded light beam and sample folded light beam, the two is interfered, again interference signal is for further processing and analyzes, thereby realized non-contact detection to the tested optical fiber geometric parameter, and, compare with scheme in the past, the utility model does not need cutting optical fibre just can carry out high resolution detection to the geometric parameter of its inside, can not cause damage to optical fiber.Simultaneously, the utility model implements simply, easily produces.
[description of drawings]
Fig. 1 is the structural representation of a kind of embodiment of the utility model optical fiber detector.
[embodiment]
Feature of the present utility model and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
As shown in Figure 1, optical fiber detector comprise light source assembly 1, optical splitter 2, with reference to reflecting module, sample scan module, photodetector 5 and signal processing analysis device 6.Wherein, comprise reference mirror 3, reference mirror scanister 9 and first drive unit with reference to reflecting module, sample scan module 10 comprises sample fixed station and optical scan vibration lens.Optical splitter 2 has input end, reference beam discrepancy end, sample beam discrepancy end and interference light output terminal, light source assembly 1 is connected with the input end optics of optical splitter 2, the reference beam discrepancy of optical splitter 2 is held and is connected with reference to reflecting module optics, the sample beam of optical splitter 2 is come in and gone out to hold and is connected with sample scan module 10 optics, the interference light output terminal of optical splitter 2 is connected with the input end optics of photodetector 5, and the output terminal of photodetector 5 is electrically coupled to the input end of signal processing analysis device 6.Further, also be provided with condenser 7 at the reference beam discrepancy end of optical splitter 2 and between with reference to reflecting module, come in and go out in the sample beam of optical splitter 2 and also to be provided with collimating apparatus 8 between end and the sample beam scan module 10, condenser 7 will be sent to reference to reflecting module after the reference beam that optical splitter penetrates is assembled, and collimating apparatus 8 will be sent to the sample scan module after will being collimated into directional light from the sample beam that optical splitter penetrates.
Be used to receive from the reference beam of optical splitter 2 and produce the reference folded light beam of change in optical path length with reference to reflecting module.On the reference mirror scanister 9 that reference mirror 3 is fixed on, the clutch end of first drive unit is coupled to reference mirror scanister 9, reference mirror scanister 9 can be taken reference mirror 3 and move back and forth under the driving of first drive unit, it moves back and forth frequency and can be several hertz to the hundreds of hertz, thereby changes the light path with reference to light path in the reflecting module.Reference mirror 3 can adopt gold-plated catoptron.First drive unit can select for use piezoelectric ceramic devices, motorized precision translation stage, vibrating motor or voice coil motor to drive, and present embodiment preferably adopts motorized precision translation stage.In another kind of embodiment, comprise reference mirror and optical scan vibration lens with reference to reflecting module, utilize the scanning of optical scan vibration lens realization to reference mirror.
In the preferred embodiment, light source assembly 1 adopts low-coherence light source, and its coherent length is between 5 microns to 20 microns, for example adopts super-radiance light emitting diode light source or femto-second laser.Coherence time of low-coherence light source is short, make with reference to folded light beam to interfere with the sample folded light beam returned from sample in the coherent length, and coherent length is short more, theoretical resolution height.Optical splitter 2 can adopt the fiber coupler 2 of 50%:50%, also can adopt the fiber coupler of other allocation models according to the requirement of concrete application.Collimating apparatus 8 adopts gradient-index lens.Photodetector 5 adopts the InGaAs photodiode of band prime amplifier, also can adopt avalanche diode or CCD (charge-coupled image sensor) etc.Also be provided with amplifying circuit, filtering circuit and detecting circuit between photodetector 5 and the signal processing analysis device 6, the output terminal of the input termination photodetector 5 of amplifying circuit, the input end of filtering circuit connects amplification circuit output end, the input end of the output termination detecting circuit of filtering circuit, the output terminal of detecting circuit connects the signal processing analysis device.Amplifying circuit adopts operational amplifier to realize that filtering circuit is selected bandpass filter for use, and detecting circuit is selected voltage comparator for use.
Introduce the principle that optical fiber detector detects optical fiber structure below.
In sum, can see, the utlity model has following obvious advantage:
1. utilizing optical means to the inside of optical fibre structure imaging, is a kind of noncontact, not damaged, high-resolution method, need not cutting optical fibre during detection fiber.
2. but the geometric configuration of detection fiber each several part comprises fibre core, covering, coat and each layer diameter.
3. can be observed the quality of the inside of optical fiber, as checking defectives such as cut, bubble, dust.
4. be used to constitute all quite ripe, the stable performance of various devices of optical fiber detector,, easily produce, easily use, can realize portable detection so device easily obtains.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (10)
1. optical fiber detector, it is characterized in that, comprise light source assembly, optical splitter, with reference to reflecting module, the sample scan module, photodetector and signal processing analysis device, testing fiber places in the described sample scan module, described optical splitter has input end, reference beam is come in and gone out and is held, sample beam is come in and gone out and is held and the interference light output terminal, described light source assembly is connected with the input end optics of described optical splitter, the reference beam of described optical splitter is come in and gone out to hold and is connected with reference to reflecting module optics with described, the described reference folded light beam that receives reference beam and produce change in optical path length of being used to reference to reflecting module, the sample beam of described optical splitter is come in and gone out to hold and is connected with described sample scan module optics, the sample beam that described sample scan module is used for receiving scans and produces the sample folded light beam to testing fiber, the interference light output terminal of described optical splitter is connected with the input end optics of described photodetector, and the output terminal of described photodetector is electrically coupled to the input end of described signal processing analysis device.
2. optical fiber detector as claimed in claim 1, it is characterized in that, the described reference mirror scanister and first drive unit that comprises reference mirror, can move back and forth with reference to reflecting module, described reference mirror is fixed on the described reference mirror scanister, described reference mirror is used for receiving reference beam and producing the reference folded light beam of change in optical path length in the process that moves with described reference mirror scanister, and the clutch end of described first drive unit is coupled to described reference mirror scanister.
3. optical fiber detector as claimed in claim 2 is characterized in that, described first drive unit is selected from piezoelectric ceramic devices, motorized precision translation stage, vibrating motor and voice coil motor.
4. optical fiber detector as claimed in claim 1 is characterized in that, describedly comprises reference mirror and optical scan vibration lens with reference to reflecting module, described optical scan vibration lens be used to receive reference beam and with its scanning at reference mirror.
5. optical fiber detector as claimed in claim 1, it is characterized in that, described sample scan module comprises sample fixed station and optical scan vibration lens, and testing fiber places on the described sample fixed station, and described optical scan vibration lens is used to receive sample beam and it is scanned at testing fiber.
6. optical fiber detector as claimed in claim 1, it is characterized in that, described sample scan module comprises that movably sample is regulated the platform and second drive unit, testing fiber places described sample to regulate on the platform, the clutch end of described second drive unit is coupled to described sample regulates platform, and described sample adjusting platform is used to drive testing fiber makes it accept the scanning of sample beam.
7. as any described optical fiber detector of claim 1 to 6, it is characterized in that, also comprise condenser and collimating apparatus, come in and go out end and of the reference beam that described condenser is arranged on described optical splitter with reference between the reflecting module, be used for being sent to after the reference beam gathering described with reference to reflecting module, described collimating apparatus is arranged on the sample beam of described optical splitter and comes in and goes out between end and the sample scan module, is sent to described sample scan module after the beam collimation that is used for penetrating from described optical splitter becomes directional light.
8. as any described optical fiber detector of claim 1 to 6, it is characterized in that: described light source assembly is low relevant super-radiance light emitting diode light source or femto-second laser.
9. as any described optical fiber detector of claim 1 to 6, it is characterized in that: described optical splitter 2 is the fiber coupler of 50%:50% for dividing optical mode.
10. as any described optical fiber detector of claim 1 to 6, it is characterized in that: the described output terminal that is successively set on described photodetector and amplifying circuit, filtering circuit and the detecting circuit between the described signal processing analysis device input end of also comprising.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200939433U CN201210045Y (en) | 2008-05-08 | 2008-05-08 | Optical fiber detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200939433U CN201210045Y (en) | 2008-05-08 | 2008-05-08 | Optical fiber detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201210045Y true CN201210045Y (en) | 2009-03-18 |
Family
ID=40480782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200939433U Expired - Lifetime CN201210045Y (en) | 2008-05-08 | 2008-05-08 | Optical fiber detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201210045Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860776A (en) * | 2017-11-22 | 2018-03-30 | 佛山科学技术学院 | A kind of defect of lens detection means and method |
| CN109580186A (en) * | 2018-12-29 | 2019-04-05 | 苏州天步光电技术有限公司 | A kind of test method of 2-D optical fibre array |
| CN110068278A (en) * | 2019-04-22 | 2019-07-30 | 南京理工大学 | Non-contact optical fiber preform size real-time measurement system and method based on FPGA |
| CN111156911A (en) * | 2019-08-12 | 2020-05-15 | 长飞光纤光缆股份有限公司 | Optical fiber coating layer diameter measuring system and testing method |
| CN111609819A (en) * | 2020-04-10 | 2020-09-01 | 桂林电子科技大学 | Super-smooth surface roughness measuring system |
| CN113758442A (en) * | 2021-09-27 | 2021-12-07 | 中国科学院沈阳自动化研究所 | Non-contact type small-diameter tube inner cavity morphology detection device and method based on low coherence interference |
| CN114945541A (en) * | 2020-01-30 | 2022-08-26 | 住友电气工业株式会社 | Cladding state detection method, cladding state detection device, and optical fiber manufacturing method |
-
2008
- 2008-05-08 CN CNU2008200939433U patent/CN201210045Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860776A (en) * | 2017-11-22 | 2018-03-30 | 佛山科学技术学院 | A kind of defect of lens detection means and method |
| CN109580186A (en) * | 2018-12-29 | 2019-04-05 | 苏州天步光电技术有限公司 | A kind of test method of 2-D optical fibre array |
| CN110068278A (en) * | 2019-04-22 | 2019-07-30 | 南京理工大学 | Non-contact optical fiber preform size real-time measurement system and method based on FPGA |
| CN111156911A (en) * | 2019-08-12 | 2020-05-15 | 长飞光纤光缆股份有限公司 | Optical fiber coating layer diameter measuring system and testing method |
| CN114945541A (en) * | 2020-01-30 | 2022-08-26 | 住友电气工业株式会社 | Cladding state detection method, cladding state detection device, and optical fiber manufacturing method |
| CN114945541B (en) * | 2020-01-30 | 2024-02-13 | 住友电气工业株式会社 | Cladding state detection method, cladding state detection device, and optical fiber manufacturing method |
| CN111609819A (en) * | 2020-04-10 | 2020-09-01 | 桂林电子科技大学 | Super-smooth surface roughness measuring system |
| CN111609819B (en) * | 2020-04-10 | 2022-03-25 | 桂林电子科技大学 | Super-smooth surface roughness measuring system |
| CN113758442A (en) * | 2021-09-27 | 2021-12-07 | 中国科学院沈阳自动化研究所 | Non-contact type small-diameter tube inner cavity morphology detection device and method based on low coherence interference |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201210045Y (en) | Optical fiber detection device | |
| CN100346739C (en) | Real-time imaging optical coherent endoscope system | |
| CN101884524B (en) | Wide view field optical coherence tomographic instrument based on adaptive optical technology | |
| CN103271721B (en) | Method and system for detecting parallel OCT based on spectrum coding and orthogonal light splitting | |
| CN103616164A (en) | Reflectivity and transmittance comprehensive measurement method based on pulse laser light source | |
| CN103175837B (en) | Method and device for detecting defect in matrix | |
| US20120194661A1 (en) | Endscopic spectral domain optical coherence tomography system based on optical coherent fiber bundle | |
| CN112325765B (en) | Area array point scanning light splitting white light interferometer | |
| CN105588847B (en) | A kind of big depth OCT scan device and method for near-transparent minerals | |
| CN1815192A (en) | Jewel internal-structure detection method and apparatus | |
| US20210080708A1 (en) | Objective optical system and microscope system | |
| Sagrario et al. | Axial and angular displacement fiber-optic sensor | |
| CN113916891A (en) | Dark field confocal Brillouin microscopic measurement device and method based on optical fiber annular light beam | |
| CN216898783U (en) | Confocal micro-measuring apparatu of line scanning spectrum | |
| CN114941984B (en) | Photoacoustic signal detection device and method of all-optical device | |
| CN102183491A (en) | Detecting device for internal structure of jewelry | |
| Ser et al. | Detection of back-scattered signal for optical fibre resonant scanner | |
| CN108051369A (en) | A kind of contactless full optics opto-acoustic imaging devices and its method | |
| EP1136799B1 (en) | Method for processing low coherence interferometric data | |
| CN112857752A (en) | Absolute measurement system and method for angle-resolved scattering of optical element | |
| CN111981973A (en) | Quick frequency sweep OCT system of frequency sweep light source | |
| CN110686865A (en) | Optical fiber fusion splicing structure based on OCT technology and loss cloud detection system | |
| JP2020198999A (en) | Optical interference tomographic imaging apparatus | |
| CN111609819B (en) | Super-smooth surface roughness measuring system | |
| CN217424314U (en) | Confocal measuring apparatu of mirror scanning spectrum shakes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN CERTAINN TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SHENZHEN MOPTIM IMAGING TECHNIQUE CO., LTD. Effective date: 20090710 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090710 Address after: B2 building, A building, Pingxi commercial street, Pingdi Town, Longgang District, Shenzhen City, Guangdong Province, zip code: 518117 Co-patentee after: Shenzhen MOPTIM Imaging Technique Co., Ltd. Patentee after: Shenzhen Space Science & Technology Co., Ltd. Address before: Guangdong Province, Shenzhen City, Nanshan District Road, Xili Town, Li sangtai building B block 14 Building 1401, zip code: 518055 Patentee before: Shenzhen MOPTIM Imaging Technique Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090318 |
|
| CX01 | Expiry of patent term |