An optimization method for improving the accuracy of centroid computation based on Shack-Hartmann wavefront sensor

CORC > 光电技术研究所 > 中国科学院光电技术研究所 > 自适应光学技术研究室（八室）

	An optimization method for improving the accuracy of centroid computation based on Shack-Hartmann wavefront sensor
	Xiaoyu Zhang [1,2,3], Caixia Wang[1,2]
	2017
关键词	adaptive optics(AO),Shack-Hartmann wavefront sensor, centroid computation, threshold, CoG
卷号	10462
页码	1046234
英文摘要	The Shack-Hartmann wavefront sensor is widely used because of high light energy utilization and the simultaneous measurement of the optical wavefront phase distribution and intensity distribution. The accuracy of the centroid computation has a great influence on the detection accuracy of the Shack-Hartmann wavefront sensor. In this paper, a new method is proposed to improve the accuracy of centroid computation. This method include three steps. First of all, we use a new sliding template method to locate the spot automatically and obtain the approximate center of the spot. Next, we take an adaptive threshold method. After the processing of subtracting the threshold , we use the center of gravity(CoG) method to calculate the spot centroid. A series of simulations are conducted to verify the effectiveness and accuracy of this new method. Compared with the widely-used optimum threshold algorithm and the CoG method, the new algorithm not only enhances the accuracy of centroid computation but also has strong stability.
会议录	0277-786X
语种	英语
内容类型	会议论文
源URL	[http://ir.ioe.ac.cn/handle/181551/9019]
专题	光电技术研究所_自适应光学技术研究室（八室）
作者单位	1.University of Chinese Academy of Sciences, Beijing, China , 100049 2.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, Sichuan, China, 610209 3.Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu , Sichuan, China, 610209
推荐引用方式 GB/T 7714	Xiaoyu Zhang [1,2,3], Caixia Wang[1,2]. An optimization method for improving the accuracy of centroid computation based on Shack-Hartmann wavefront sensor[C]. 见:.