A high-precision centroid detecting method for Hartmann-Shack wavefront sensor

	A high-precision centroid detecting method for Hartmann-Shack wavefront sensor
	Li J.; Gong Y.; Hu X.; Li C.
	2014
发表期刊	Zhongguo Jiguang/中文 Journal of Lasers
ISSN	ISBN/02587025
卷号	41 期号:3
摘要	In order to improve spots centroid detection accuracy of Hartmann-Shack wavefront sensor (HS-WFS) to achieve high-precision of wavefront test of optical system, a centroid detecting method is proposed. The nonlinear filtering and the windowing spot image in global processing are used, combining with median filtering, cubic spline interpolation and adaptive Otsu thresholding for a single spot in local processing. The regulation of centriod error and calculation time with different interpolation points is discussed. For a spot image with noise, the centroid detection error is only 0.0442 pixel. Compared with the traditional methods of nonlinear filtering, the Otsu thresholding method and the detection windowing, the accuracies are increased by 91.86%, 87.97% and 31.79%. The known wavefront aberration of an optical system is simulation tested. The wavefront testing accuracy is 0.0098 in peak-valley (PV) value, and is 0.0027 in root-mean-square (RMS) value. The results show that this method enhances the accuracy of centroid detection, and is suitable for high-precision optical systems.
收录类别	EI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/43676
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Li J.,Gong Y.,Hu X.,et al. A high-precision centroid detecting method for Hartmann-Shack wavefront sensor[J]. Zhongguo Jiguang/中文 Journal of Lasers,2014,41(3).
APA	Li J.,Gong Y.,Hu X.,&Li C..(2014).A high-precision centroid detecting method for Hartmann-Shack wavefront sensor.Zhongguo Jiguang/中文 Journal of Lasers,41(3).
MLA	Li J.,et al."A high-precision centroid detecting method for Hartmann-Shack wavefront sensor".Zhongguo Jiguang/中文 Journal of Lasers 41.3(2014).

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