CN103954240A - Method for measuring torsion angle of polarization-maintaining optical fiber based on spectral-domain OCT imaging system - Google Patents
Method for measuring torsion angle of polarization-maintaining optical fiber based on spectral-domain OCT imaging system Download PDFInfo
- Publication number
- CN103954240A CN103954240A CN201410140519.XA CN201410140519A CN103954240A CN 103954240 A CN103954240 A CN 103954240A CN 201410140519 A CN201410140519 A CN 201410140519A CN 103954240 A CN103954240 A CN 103954240A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- maintaining optical
- polarization maintaining
- optical fibre
- spectral coverage
- 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.)
- Granted
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a method for measuring the torsion angle of a polarization-maintaining optical fiber based on a spectral-domain OCT imaging system. The method is implemented on a device for measuring the torsion angle of the polarization-maintaining optical fiber based on the spectral-domain OCT imaging system. The device comprises an optical fiber pay-off unit, an optical fiber take-up unit, an optical probe, the spectral-domain OCT system, a computer and the polarization-maintaining optical fiber to be measured. According to the method, tomography is carried out on the polarization-maintaining optical fiber to be measured to obtain CT images of different portions of the polarization-maintaining optical fiber, and then the torsion angle of the polarization-maintaining optical fiber is measured according to the relative position of center points of two stress regions in each obtained image. The method has the advantages of high resolution, nondestructive performance and real-time performance.
Description
Technical field
The present invention relates to a kind of based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion method.
Technical background
When optical fiber reverses along axle, due to the effect of shear stress, can in transmission ray, cause circular birefringence.At optical fiber, particularly in the use procedure of polarization maintaining optical fibre, the circular birefringence meeting being caused by torsion impacts and introduces error to Output rusults, and institute thinks improves result precision, in the use procedure of polarization maintaining optical fibre, is necessary its windup-degree to measure.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, provide a kind of based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion method.
The object of the invention is to be achieved through the following technical solutions: a kind of based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion method, the method realizes on based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion device, describedly comprises optical fiber wire releasing device, optical fiber take-up, optic probe, spectral coverage OCT system, computer, polarization maintaining optical fibre to be measured based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion device.Wherein, polarization maintaining optical fibre to be measured is placed in optical fiber wire releasing device and optical fiber take-up; Spectral coverage OCT system is connected with computer; The optic probe of spectral coverage OCT system is placed in polarization maintaining optical fibre to be measured top for transversal scanning; The method comprises the following steps:
(1) get dish polarization maintaining optical fibre to be measured and be placed in optical fiber wire releasing device and carry out unwrapping wire, optical fiber take-up carries out take-up simultaneously;
(2) in the selected a certain moment, suspend optical fiber take-up and optical fiber wire releasing device work, then utilize spectral coverage OCT system optics probe certain on testing fiber, be assumed to be A place, carry out transversal scanning;
(3) after scanning, obtain the cross-section image at this place by spectral coverage OCT system, then in computing machine, carry out image processing with Lucy-Richardson scheduling algorithm, finally obtain this place's section reconstructed image;
(4) in the covering of polarization maintaining optical fibre, have two stressed zones, they find the central point of two stressed zones about fiber optic hub symmetry in reconstructed image, are designated as respectively S
1and S
2, and these 2 corresponding pixel coordinates are respectively (X
1, Y
1) and (X
2, Y
2);
(5) recover actinobacillus device and take-up work, the more selected a certain moment, suspend optical fiber take-up and optical fiber wire releasing device work, then utilize spectral coverage OCT system optics probe another location on polarization maintaining optical fibre to be measured, be assumed to be B place, and to record A and B distance be L, carry out transversal scanning;
(6) repeating step (3), then finally obtains the position of two stressed zone central points in B place section reconstructed image, is designated as respectively T
1and T
2, and these 2 corresponding pixel coordinates are respectively (X
3, Y
3) and (X
4, Y
4);
(7) utilize the relation of two included angle of straight line and slope in mathematics geometric relationship, can obtain the average torsion rate of polarization maintaining optical fibre AB section to be measured
expression formula:
。
The invention has the beneficial effects as follows, the polarization maintaining optical fibre that the present invention proposes reverses measuring method based on spectral coverage OCT imaging system, and wherein, OCT is optical coherent chromatographic imaging art, utilize spectral coverage OCT imaging system to measure polarization maintaining optical fibre torsion angle, there is the feature of high-resolution, harmless, real-time.
Brief description of the drawings
Fig. 1 measures the device schematic diagram that polarization maintaining optical fibre reverses;
Fig. 2 is A place section structure schematic diagram on panda type polarization-preserving fiber to be measured after image reconstruction process;
Fig. 3 is B place section structure schematic diagram on panda type polarization-preserving fiber to be measured after image reconstruction process;
In figure, optical fiber wire releasing device 1, optical fiber take-up 2, optic probe 3, spectral coverage OCT system 4, computer 5, polarization maintaining optical fibre to be measured 6.
Embodiment
Spectral coverage OCT imaging system, the core of its device is Michelson interferometer, adopt wideband light source, interfering, the light returning from reference arm and sample arm is divided into the interference spectrum signal of different wave length in spectrometer, finally, by after Fast Fourier Transform (FFT), can obtain the depth information of sample.The resolution of system comprises axial resolution and lateral resolution, is determined respectively by condenser lens parameter in light source and sample arm.The measuring-signal of optical coherent chromatographic imaging is located by light path, do not represent real space distance, therefore, conventional optical coherence tomography image often exists geometric distortion, need to after Fast Fourier Transform (FFT) become image to be reconstructed processing, generally can utilize at present Lucy-Richardson scheduling algorithm to carry out deconvolution and operate to carry out Image Reconstruction.For the areas imaging of system, the maximum imaging depth of current spectral coverage OCT system is generally in 2mm left and right, and polarization maintaining optical fibre diameter is 200 microns of left and right, so can meet the cross-sectional imaging of polarization maintaining optical fibre.
Further illustrate the present invention below in conjunction with drawings and Examples.
The present invention is based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion method, the method realizes on based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion device, as shown in Figure 1, comprise optical fiber wire releasing device 1, optical fiber take-up 2, optic probe 3, spectral coverage OCT system 4, computer 5, polarization maintaining optical fibre to be measured 6 based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion device.
Polarization maintaining optical fibre 6 to be measured is placed in optical fiber wire releasing device 1 and optical fiber take-up 2, and spectral coverage OCT system 4 is connected with computer 5, and the optic probe 3 of spectral coverage OCT system 4 is placed in polarization maintaining optical fibre to be measured 6 tops for transversal scanning.
The method comprises the following steps:
(1) get dish polarization maintaining optical fibre 6 to be measured, described polarization maintaining optical fibre 6 to be measured is panda type polarization-preserving fiber, is placed in optical fiber wire releasing device 1 and carries out unwrapping wire, and optical fiber take-up 2 carries out take-up simultaneously;
(2) the selected a certain moment, suspend optical fiber take-up 2 and optical fiber wire releasing device 1 and work, the A place of the optic probe 3 that then utilizes spectral coverage OCT system 4 on testing fiber 6, as shown in Figure 1, carries out transversal scanning;
(3) after scanning, obtain the cross-section image at this place by spectral coverage OCT system 4, then in computing machine 5, carry out image processing with Lucy-Richardson scheduling algorithm, finally obtain this place's section reconstructed image;
(4) in the covering of panda type polarization-preserving fiber, have two stressed zones, they find the central point of two stressed zones about fiber optic hub symmetry in reconstructed image, are designated as respectively S
1and S
2, and these 2 corresponding pixel coordinates are respectively (X
1, Y
1) and (X
2, Y
2), as shown in Figure 2;
(5) recovering optical fiber wire releasing device 1 and optical fiber take-up 2 works, the selected a certain moment again, suspending optical fiber wire releasing device 1 and optical fiber take-up 2 works, then utilize optic probe 3 B place on polarization maintaining optical fibre 6 to be measured of spectral coverage OCT system 4, A and B distance are L, as shown in Figure 1, carry out transversal scanning;
(6) repeating step (3), then finally obtains the position of two stressed zone central points in B place section reconstructed image, is designated as respectively T
1and T
2, and these 2 corresponding pixel coordinates are respectively (X
3, Y
3) and (X
4, Y
4), as shown in Figure 3;
(7) utilize the relation of two included angle of straight line and slope in mathematics geometric relationship, can obtain the average torsion rate of the AB section of polarization maintaining optical fibre 6 to be measured
expression formula:
。
Claims (1)
1. one kind based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion method, the method realizes on based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion device, describedly comprises optical fiber wire releasing device, optical fiber take-up, optic probe, spectral coverage OCT system, computer, polarization maintaining optical fibre to be measured based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion device; Wherein, polarization maintaining optical fibre to be measured is placed in optical fiber wire releasing device and optical fiber take-up; Spectral coverage OCT system is connected with computer; The optic probe of spectral coverage OCT system is placed in polarization maintaining optical fibre to be measured top for transversal scanning; It is characterized in that, the method comprises the following steps:
(1) get dish polarization maintaining optical fibre to be measured and be placed in optical fiber wire releasing device and carry out unwrapping wire, optical fiber take-up carries out take-up simultaneously;
(2) in the selected a certain moment, suspend optical fiber take-up and optical fiber wire releasing device work, then utilize spectral coverage OCT system optics probe certain on testing fiber, be assumed to be A place, carry out transversal scanning;
(3) after scanning, obtain the cross-section image at this place by spectral coverage OCT system, then in computing machine, carry out image processing with Lucy-Richardson scheduling algorithm, finally obtain this place's section reconstructed image;
(4) in the covering of polarization maintaining optical fibre, have two stressed zones, they find the central point of two stressed zones about fiber optic hub symmetry in reconstructed image, are designated as respectively S
1and S
2, and these 2 corresponding pixel coordinates are respectively (X
1, Y
1) and (X
2, Y
2);
(5) recover actinobacillus device and take-up work, the more selected a certain moment, suspend optical fiber take-up and optical fiber wire releasing device work, then utilize spectral coverage OCT system optics probe another location on polarization maintaining optical fibre to be measured, be assumed to be B place, and to record A and B distance be L, carry out transversal scanning;
(6) repeating step (3), then finally obtains the position of two stressed zone central points in B place section reconstructed image, is designated as respectively T
1and T
2, and these 2 corresponding pixel coordinates are respectively (X
3, Y
3) and (X
4, Y
4);
(7) utilize the relation of two included angle of straight line and slope in mathematics geometric relationship, can obtain the average torsion rate of polarization maintaining optical fibre AB section to be measured
expression formula:
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410140519.XA CN103954240B (en) | 2014-04-10 | 2014-04-10 | A kind of based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410140519.XA CN103954240B (en) | 2014-04-10 | 2014-04-10 | A kind of based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103954240A true CN103954240A (en) | 2014-07-30 |
| CN103954240B CN103954240B (en) | 2016-09-14 |
Family
ID=51331550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410140519.XA Expired - Fee Related CN103954240B (en) | 2014-04-10 | 2014-04-10 | A kind of based on spectral coverage OCT imaging systematic survey polarization maintaining optical fibre torsion method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103954240B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104567737A (en) * | 2014-12-24 | 2015-04-29 | 浙江大学 | Axis determination method of panda-type polarization-maintaining optical fiber end surface |
| CN104655058A (en) * | 2015-02-12 | 2015-05-27 | 浙江大学 | Device and method for twisting detection and untwisting of panda-type polarization-maintaining optical fiber |
| CN113865915A (en) * | 2021-09-18 | 2021-12-31 | 长江存储科技有限责任公司 | Detection method of sliced sample |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1508825A1 (en) * | 2003-08-18 | 2005-02-23 | CCS Technology, Inc. | Method and device for determining the angular position of a polarization maintaining fiber |
| EP1531348A1 (en) * | 2003-11-11 | 2005-05-18 | CCS Technology, Inc. | Method and device for determining the angular position of polarization-maintaining optical fiber |
| CN1643418A (en) * | 2002-03-15 | 2005-07-20 | 株式会社藤仓 | Polarization-maintaining optical fiber |
| CN101419311A (en) * | 2008-11-11 | 2009-04-29 | 北京大学 | Countershaft matching method for side elevation of polarization maintaining optical fibre and apparatus thereof |
| CN102645184A (en) * | 2010-11-24 | 2012-08-22 | 西安金和光学科技有限公司 | Differential optical fiber type twisting angle detecting device |
-
2014
- 2014-04-10 CN CN201410140519.XA patent/CN103954240B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643418A (en) * | 2002-03-15 | 2005-07-20 | 株式会社藤仓 | Polarization-maintaining optical fiber |
| EP1508825A1 (en) * | 2003-08-18 | 2005-02-23 | CCS Technology, Inc. | Method and device for determining the angular position of a polarization maintaining fiber |
| EP1531348A1 (en) * | 2003-11-11 | 2005-05-18 | CCS Technology, Inc. | Method and device for determining the angular position of polarization-maintaining optical fiber |
| CN101419311A (en) * | 2008-11-11 | 2009-04-29 | 北京大学 | Countershaft matching method for side elevation of polarization maintaining optical fibre and apparatus thereof |
| CN102645184A (en) * | 2010-11-24 | 2012-08-22 | 西安金和光学科技有限公司 | Differential optical fiber type twisting angle detecting device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104567737A (en) * | 2014-12-24 | 2015-04-29 | 浙江大学 | Axis determination method of panda-type polarization-maintaining optical fiber end surface |
| CN104567737B (en) * | 2014-12-24 | 2017-05-10 | 浙江大学 | Axis determination method of panda-type polarization-maintaining optical fiber end surface |
| CN104655058A (en) * | 2015-02-12 | 2015-05-27 | 浙江大学 | Device and method for twisting detection and untwisting of panda-type polarization-maintaining optical fiber |
| CN104655058B (en) * | 2015-02-12 | 2017-08-25 | 浙江大学 | The apparatus and method that a kind of panda type polarization-preserving fiber reverses detection and back twist |
| CN113865915A (en) * | 2021-09-18 | 2021-12-31 | 长江存储科技有限责任公司 | Detection method of sliced sample |
| CN113865915B (en) * | 2021-09-18 | 2023-10-13 | 长江存储科技有限责任公司 | Slice sample detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103954240B (en) | 2016-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3234667A1 (en) | Dissimilar cores in multicore optical fiber for strain and temperature separation | |
| JP2014045908A5 (en) | ||
| CN102901615B (en) | Method and device for detecting optical fiber ring quality based on optical coherence tomography | |
| CN102818786A (en) | Sinusoidal phase modulation parallel complex frequency domain optical coherence tomography imaging system and method | |
| US20200378745A1 (en) | Iterative Optical Diffraction Tomography (iODT) Method and Applications | |
| CN103954240A (en) | Method for measuring torsion angle of polarization-maintaining optical fiber based on spectral-domain OCT imaging system | |
| CN109900355B (en) | Imaging method and device | |
| Huang et al. | Real-time reference A-line subtraction and saturation artifact removal using graphics processing unit for high-frame-rate Fourier-domain optical coherence tomography video imaging | |
| CN103697811A (en) | Method of obtaining three-dimensional coordinates of profile of object through combining camera and structural light source | |
| CN103322944B (en) | Coaxial-illuminating mirror-image mole measuring device and method | |
| US9600444B2 (en) | Method for generating information signal | |
| CN104849221A (en) | Optical coherence tomography-based phase calibration method | |
| CN109297595A (en) | A kind of optical coherence tomography phase unwrapping around method and device | |
| Wang et al. | Three-dimensional thickness reconstruction of ICF shells using X-ray tomography | |
| CN206339204U (en) | The flexibility measurement apparatus of bar | |
| CN104034266A (en) | Surface microstructure based high-accuracy length detection method | |
| CN104819961B (en) | A kind of digital hologram system of online nondestructive measurement special optical fiber refractive index | |
| JP2014239873A (en) | Arithmetic unit, program, and imaging system | |
| CN107515103A (en) | A kind of focal length detection means and method using circular grating | |
| CN103267485A (en) | Point-diffraction three-dimensional absolute displacement measuring method | |
| Van der Jeught et al. | Real-time correction of geometric distortion artefacts in large-volume optical coherence tomography | |
| CN203811140U (en) | Polar coordinates tire profile measurer | |
| You et al. | GPU-accelerated white-light scanning interferometer for large-area, high-speed surface profile measurements | |
| CN108398098A (en) | A kind of optical surface spacing non-contact measurement apparatus and method | |
| CN107869964A (en) | The detection method and device of aspheric surface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20160914 Termination date: 20200410 |