Rapid and precise image measurement of oblique angle of the coupling fiber

Tian Yongsheng; Hou Jin; Long Yinfu; Tang Cuijiao; Huang Yuchun; Yang Chunyong; Chen Shaoping

doi:10.3788/IRLA201948.1013001

Volume 48 Issue 10

Oct. 2019

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Article Navigation > Infrared and Laser Engineering > 2019 > 48(10): 1013001-1013001(8)

Tian Yongsheng, Hou Jin, Long Yinfu, Tang Cuijiao, Huang Yuchun, Yang Chunyong, Chen Shaoping. Rapid and precise image measurement of oblique angle of the coupling fiber[J]. Infrared and Laser Engineering, 2019, 48(10): 1013001-1013001(8). doi: 10.3788/IRLA201948.1013001

Citation:

Tian Yongsheng, Hou Jin, Long Yinfu, Tang Cuijiao, Huang Yuchun, Yang Chunyong, Chen Shaoping. Rapid and precise image measurement of oblique angle of the coupling fiber[J]. Infrared and Laser Engineering, 2019, 48(10): 1013001-1013001(8). doi: 10.3788/IRLA201948.1013001

Rapid and precise image measurement of oblique angle of the coupling fiber

doi: 10.3788/IRLA201948.1013001

1.
Hubei Key Laboratory of Intelligent Wireless Communications,College of Electronics and Information Engineering,South-Central University for Nationalities,Wuhan 430074,China;
2.
School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430074,China

Received Date: 2019-05-05
Rev Recd Date: 2019-06-15
Publish Date: 2019-10-25

Abstract

The oblique angle of the fiber coupling to the upper surface of the optical chip, is one of the key factors affecting the optical coupling efficiency. Contrary to the low efficiency, poor precision and instability of the traditional angle measurement methods, the coordinate system re-establishment method combined the image processing technology were adopted to realize the rapid and precise measurement of the oblique angles. Firstly, based on conventional image angle measurement method, a targeted checkerboard was introduced to calibrate coordinate system, thus reducing the errors caused by slight rotations of the optical axis, which would happen at the time that the CCD optical amplification system acquiring the image information of the tiny optical fiber. Then to reduce the influence of noise while ensuring the detection accuracy of the linear characteristics of the fiber, Hough transform method and image thinning method, which were two classic methods to extract the linear parameters of the fiber, were compared. Combining the triangular relationship of the linear elements on the projection surface, the oblique angle of the coupling fiber was finally obtained. The experimental results show that the line extraction algorithm based on Hough transform can measure oblique angle of the coupling fiber optic under small size with higher accuracy and speed, the error is about 0.1 and the average operation time is 0.370 seconds.
- oblique angle of the coupling fiber,
- image processing,
- reference direction,
- small size measurement,
- triangular relationship

References

[1]	Wu Hua, Han Mingfu, Guo Xia. Broadband high-efficiency grating coupler based on the tailored artificial equivalent refractive index[J]. Acta Optica Sinica, 2014, 34(11):52-57. (in Chinese)
[2]	Chen Z H, Wang Y, Jiang Y, et al. Grating coupler on single-crystal lithium niobate thin film[J]. Optical Materials, 2017, 72:136-139.
[3]	Yang Biao, Li Zhiyong, Xiao Xia, et al. The progress of silicon-based grating couplers[J]. Acta Physica Sinica, 2013, 62(18):254-260. (in Chinese)
[4]	Dai M, Ma L L, Xu Y L, et al. Highly efficient and perfectly vertical chip-to-fiber dual-layer grating coupler[J]. Optics Express, 2015, 23(2):1691-1698.
[5]	Bolten J, Hofrichter J, Moll N, et al. CMOS compatible cost-efficient fabrication of SOI grating couplers[J]. Microelectronic Engineering, 2009, 86(4):1114-1116.
[6]	Taillaert S, Laere F V, Ayre M, et al. Grating couplers for coupling between optical fibers and nanophotonic waveguides[J]. Japanese Journal of Applied Physics, 2006, 45(45):6071-6077.
[7]	Li Lichun, Yu Qifeng, Lei Zhihui, et al. High-accuracy measurement of rotation angle based on image[J]. Acta Optica Sinica, 2005, 25(4):491-496. (in Chinese)
[8]	Hu Wenchuan, Qiu Zurong, Zhang Guoxiong. Measurement of large-scale space angle formed by non-uniplanar lines[J]. Optics and Precision Engineering, 2012, 20(7):1427-1433. (in Chinese)
[9]	Zhang Wancheng, Ye Zequn. A design of visual identifi-cation technology for accurate winding of optical fiber[J]. Electronics Process Technology, 2015, 36(3):172-174, 178. (in Chinese)
[10]	Fang Qimeng, Feng Di, Yu Wenhai, et al. Positioning method based on image processing for pigtail of polarization maintaining fiber[J]. Optoelectronic Technology, 2018, 38(2):83-88. (in Chinese)
[11]	Sun Wei, Zhang Xiaorui, Tang Hhuiqiang, et al. Lane coordination detection based Hough transformation and least square fitting[J]. Opto-Electronic Engineering, 2011, 38(10):13-19. (in Chinese)
[12]	Huang Zhuo, Chen Fengdong, Liu Guodong, et al. Dark field image registration based on connection vector feature matching method[J]. Infrared and Laser Engineering, 2018, 47(11):1126005. (in Chinese)
[13]	Kumar B K S. Image fusion based on pixel significance using cross bilateral filter[J]. Signal Image and Video Processing, 2015, 9(5):1193-1204.
[14]	Wang Linhua, Yuan Minghui, Huang Hui, et al. Recognition of edge object of human body in THz security inspection system[J]. Infrared and Laser Engineering, 2017, 46(11):1125002. (in Chinese)
[15]	Gao J W, Xie H T, Zuo L, et al. A robust pointer meter reading recognition method for substation inspection robot[C]//2017 International Conference on Robotics and Automation Sciences, 2017:43-47.
[16]	Sun Fengjie, Guo Fengshun, Fan Jieqing, et al. Studies of the recognition of pointer angle of dial based on image processing[J]. Proceedings of the CSEE, 2005, 25(16):73-78. (in Chinese)
[17]	Zhang T Y, Suen C Y. A fast parallel algorithm for thinning digital patterns[J]. Communications of the ACM, 1984, 27(3):236-239.
[18]	Zhang Cun, Lei Junfneg, Guo Yong, et al. The real-time measurement of the rotation angle[J]. Opto-Electronic Engineering, 2016, 43(3):16-22. (in Chinese)
[19]	Liu Bin, Wang Jianping, Li Xiaofeng. Perspective projection error in visual inspection of the LAM OST focal plane[J]. Machinery Electronics, 2010(5):11-14.
[20]	Meng Libo, Jin Guanchang, Yao Xuefeng. Errors caused by misalignment of the optical camera axis and the object surface in the DSCM[J]. Journal of Tsinghua University(Science and Technology), 2006(11):1930-1932, 1936. (in Chinese)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Rapid and precise image measurement of oblique angle of the coupling fiber

1. Hubei Key Laboratory of Intelligent Wireless Communications,College of Electronics and Information Engineering,South-Central University for Nationalities,Wuhan 430074,China;

2. School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430074,China

Received Date: 2019-05-05

Rev Recd Date: 2019-06-15

Publish Date: 2019-10-25

Key words:

Abstract: The oblique angle of the fiber coupling to the upper surface of the optical chip, is one of the key factors affecting the optical coupling efficiency. Contrary to the low efficiency, poor precision and instability of the traditional angle measurement methods, the coordinate system re-establishment method combined the image processing technology were adopted to realize the rapid and precise measurement of the oblique angles. Firstly, based on conventional image angle measurement method, a targeted checkerboard was introduced to calibrate coordinate system, thus reducing the errors caused by slight rotations of the optical axis, which would happen at the time that the CCD optical amplification system acquiring the image information of the tiny optical fiber. Then to reduce the influence of noise while ensuring the detection accuracy of the linear characteristics of the fiber, Hough transform method and image thinning method, which were two classic methods to extract the linear parameters of the fiber, were compared. Combining the triangular relationship of the linear elements on the projection surface, the oblique angle of the coupling fiber was finally obtained. The experimental results show that the line extraction algorithm based on Hough transform can measure oblique angle of the coupling fiber optic under small size with higher accuracy and speed, the error is about 0.1 and the average operation time is 0.370 seconds.

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Reference (20)

[1]	Wu Hua, Han Mingfu, Guo Xia. Broadband high-efficiency grating coupler based on the tailored artificial equivalent refractive index[J]. Acta Optica Sinica, 2014, 34(11):52-57. (in Chinese)
[2]	Chen Z H, Wang Y, Jiang Y, et al. Grating coupler on single-crystal lithium niobate thin film[J]. Optical Materials, 2017, 72:136-139.
[3]	Yang Biao, Li Zhiyong, Xiao Xia, et al. The progress of silicon-based grating couplers[J]. Acta Physica Sinica, 2013, 62(18):254-260. (in Chinese)
[4]	Dai M, Ma L L, Xu Y L, et al. Highly efficient and perfectly vertical chip-to-fiber dual-layer grating coupler[J]. Optics Express, 2015, 23(2):1691-1698.
[5]	Bolten J, Hofrichter J, Moll N, et al. CMOS compatible cost-efficient fabrication of SOI grating couplers[J]. Microelectronic Engineering, 2009, 86(4):1114-1116.
[6]	Taillaert S, Laere F V, Ayre M, et al. Grating couplers for coupling between optical fibers and nanophotonic waveguides[J]. Japanese Journal of Applied Physics, 2006, 45(45):6071-6077.
[7]	Li Lichun, Yu Qifeng, Lei Zhihui, et al. High-accuracy measurement of rotation angle based on image[J]. Acta Optica Sinica, 2005, 25(4):491-496. (in Chinese)
[8]	Hu Wenchuan, Qiu Zurong, Zhang Guoxiong. Measurement of large-scale space angle formed by non-uniplanar lines[J]. Optics and Precision Engineering, 2012, 20(7):1427-1433. (in Chinese)
[9]	Zhang Wancheng, Ye Zequn. A design of visual identifi-cation technology for accurate winding of optical fiber[J]. Electronics Process Technology, 2015, 36(3):172-174, 178. (in Chinese)
[10]	Fang Qimeng, Feng Di, Yu Wenhai, et al. Positioning method based on image processing for pigtail of polarization maintaining fiber[J]. Optoelectronic Technology, 2018, 38(2):83-88. (in Chinese)
[11]	Sun Wei, Zhang Xiaorui, Tang Hhuiqiang, et al. Lane coordination detection based Hough transformation and least square fitting[J]. Opto-Electronic Engineering, 2011, 38(10):13-19. (in Chinese)
[12]	Huang Zhuo, Chen Fengdong, Liu Guodong, et al. Dark field image registration based on connection vector feature matching method[J]. Infrared and Laser Engineering, 2018, 47(11):1126005. (in Chinese)
[13]	Kumar B K S. Image fusion based on pixel significance using cross bilateral filter[J]. Signal Image and Video Processing, 2015, 9(5):1193-1204.
[14]	Wang Linhua, Yuan Minghui, Huang Hui, et al. Recognition of edge object of human body in THz security inspection system[J]. Infrared and Laser Engineering, 2017, 46(11):1125002. (in Chinese)
[15]	Gao J W, Xie H T, Zuo L, et al. A robust pointer meter reading recognition method for substation inspection robot[C]//2017 International Conference on Robotics and Automation Sciences, 2017:43-47.
[16]	Sun Fengjie, Guo Fengshun, Fan Jieqing, et al. Studies of the recognition of pointer angle of dial based on image processing[J]. Proceedings of the CSEE, 2005, 25(16):73-78. (in Chinese)
[17]	Zhang T Y, Suen C Y. A fast parallel algorithm for thinning digital patterns[J]. Communications of the ACM, 1984, 27(3):236-239.
[18]	Zhang Cun, Lei Junfneg, Guo Yong, et al. The real-time measurement of the rotation angle[J]. Opto-Electronic Engineering, 2016, 43(3):16-22. (in Chinese)
[19]	Liu Bin, Wang Jianping, Li Xiaofeng. Perspective projection error in visual inspection of the LAM OST focal plane[J]. Machinery Electronics, 2010(5):11-14.
[20]	Meng Libo, Jin Guanchang, Yao Xuefeng. Errors caused by misalignment of the optical camera axis and the object surface in the DSCM[J]. Journal of Tsinghua University(Science and Technology), 2006(11):1930-1932, 1936. (in Chinese)

Rapid and precise image measurement of oblique angle of the coupling fiber

doi: 10.3788/IRLA201948.1013001

Abstract

References

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通讯作者: 陈斌, bchen63@163.com

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