Measurement of single mode fiber non-circularity based on image processing

Shaorong Xiao; Hen Hu; Xiaoli Mao; Bo Zhang

doi:10.1117/12.805642

2 February 2009 Measurement of single mode fiber non-circularity based on image processing

Shaorong Xiao, Hen Hu, Xiaoli Mao, Bo Zhang

Proceedings Volume 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications; 716006 (2009) https://doi.org/10.1117/12.805642
Event: International Conference of Optical Instrument and Technology, 2008, Beijing, China

Abstract

Method of computer digital image processing was utilized to measure non-circularity of single mode fiber. The two end faces were polished, the faces come into plane, and which are perpendicular to fiber axis. Laser beam was thrown on one end of the fiber, and an inerratic spot was formed from light beam put out at another end of the fiber. The spot was shot by a digital camera with 5.1x10⁶ pixels. The image was processed with a computer. The process includes full color picture being translated into gray one, contrast enhancement, median filtering, and picking-up contour line. The every different three points on the contour line were taken out to determine one circular radius, average of many radiuses was calculated, The maximum radius and the minimum radius are picked out to calculate the fiber no-circularity in according to definition. Visual C++ and Matlab were used to programme. The results of experiment show that measurement precision is independent of the sampling number, but dependence of gray value, and average standard deviation is about 0.03%.

Citation Download Citation

Shaorong Xiao, Hen Hu, Xiaoli Mao, and Bo Zhang "Measurement of single mode fiber non-circularity based on image processing", Proc. SPIE 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, 716006 (2 February 2009); https://doi.org/10.1117/12.805642

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KEYWORDS

Image processing

Single mode fibers

Cameras

Microscopes

Optical fibers

Digital cameras

CCD cameras

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