Phase scanning centering based on polar coordinate transformation
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摘要: 为了实现无衍射光斑作为直线基准在复杂噪声背景下仍能快速精确定中的目的，采用相位扫描的方法来获得极坐标系下的无衍射光斑相位角随极角的振荡起伏，对无衍射光斑在环向上的相位与标准正弦条纹的相位对比获得其偏离量，通过多次迭代便实现了无衍射光斑的定中，并进行了理论分析与测试实验。结果表明，该算法具有良好的抗噪能力、较低的计算时耗和亚像素级的定中精度。Abstract: In order to realize fast and precise centering with non-diffracting spot as straight-line datum under complex background noise, the fluctuation of phase angle of non-diffraction spot with polar angle under polar coordinates was obtained with the phase scanning method. The deviation was the difference between the phase of non-diffraction spots on the ring direction and the phase of standard sinusoidal stripes. Finally, the centering of the non-diffraction spot can be realized after a number of iterations. Theoretical analysis and experimental verification show the method has the good ability of anti-noise, less time consumption and sub-pixel level accuracy.
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Keywords:
- image processing /
- signal processing /
- diffraction /
- phase scanning /
- non-diffraction spot
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[1] FAN K C, ZHAO Y. A laser straightness measurement system using optical fiber and modulation techniques [J]. International Journal of Machine Tools and Manufacture,2000,40(14): 2073-2081.
[2] LIN S T. A laser interferometer for measuring straightness [J]. Optics and Laser Technology,2001,33(3): 195-199.
[3] SHERRINGTON I, SMITH E H. The significance of surface topography in engineering [J]. Precision Engineering, 1986,8(2):79-86.
[4] MA G L, ZHAO B, FAN Y Y. Non-diffracting beam based probe technology for measuring coordinates of hidden parts [J]. Optics and Lasers in Engineering, 2012,51(5): 585-591.
[5] ZHANG X B, ZHAO B, LI Zh. Measurement method of spatial straightness error using non-diffracting technology and moir-fringe technology [J]. Journal of Optics,2004,A6(1):121-126.
[6] LI Zh W, WANG C J, SHI Y Sh. An algorithm for detecting center of structured light stripe combining gradient sharpening with barycenter method [J]. Journal of Image and Graphics,2008,13(1):64-68(in Chinese).
[7] YUEN Sh Y, MA Ch H. An investigation of the nature of parameterization for the Hough transforms [J]. Pattern Recognition, 1997,30(6):1009-1040.
[8] KONG B, WANG Zh, TAN Y Sh. Algorithm of laser spot detection based on circle fitting[J].Infrared and Laser Engineering,2002,31(3):275-279(in Chinese).
[9] ZHAO B.Digital Moir fringe-scanning method for centering a circular fringe image [J]. Applied Optics, 2004, 43(14):2833-2839.
[10] BI X W, ZHU L M, ZHAO B. A center detection algorithm of non-diffracting beam based on ring filtering [J]. Journal of Shanghai Jiaotong University,2010,44(1):106-110(in Chinese).
[11] ZHAO B, LI Zh. Diffraction property of an axicon in oblique illumination [J]. Applied Optics, 1998, 37(13): 2563-2568.
[12] ZHOU L P, ZHAO B, LI Zh. Influence of manufacture error of an axicon on beam transmission [J]. Journal of Huazhong University of Science and Technology,2001,29(3):61-63(in Chinese).
[13] ZHANG H Zh, YAO M, LEI P,et al.Research of image processing method of far-field laser spots[J]. Laser Technology, 2013, 37(4):460-463(in Chinese).
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