Fundamental performance of transverse wind estimator from Shack-Hartmann wave-front sensor measurements

doi:10.1364/OE.26.011859

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）

	Fundamental performance of transverse wind estimator from Shack-Hartmann wave-front sensor measurements
	Li, Zhenghan 1,2,3; Li, Xinyang 1,2
刊名	OPTICS EXPRESS
	2018-04-30
卷号	26 期号:9 页码:11859-11876
关键词	Adaptive control systems Adaptive optics Delay control systems Iterative methods Real time systems
ISSN号	1094-4087
DOI	10.1364/OE.26.011859
文献子类	J
英文摘要	Real time transverse wind estimation contributes to predictive correction which is used to compensate for the time delay error in the control systems of adaptive optics (AO) system. Many methods that apply Shack-Hartmann wave-front sensor to wind profile measurement have been proposed. One of the obvious problems is the lack of a fundamental benchmark to compare the various methods. In this work, we present the fundamental performance limits for transverse wind estimator from Shack-Hartmann wave-front sensor measurements using Cramer-Rao lower bound (CRLB). The bound provides insight into the nature of the transverse wind estimation, thereby suggesting how to design and improve the estimator in the different application scenario. We analyze the theoretical bound and find that factors such as slope measurement noise, wind velocity and atmospheric coherence length r(0) have important influence on the performance. Then, we introduced the non-iterative gradient-based transverse wind estimator. The source of the deterministic bias of the gradient-based transverse wind estimators is analyzed for the first time. Finally, we derived biased CRLB for the gradient-based transverse wind estimators from Shack-Hartmann wave-front sensor measurements and the bound can predict the performance of estimator more accurately. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
WOS关键词	ADAPTIVE OPTICS CONTROL ; TURBULENCE ; PREDICTION
语种	英语
WOS记录号	WOS:000431718300070
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/9342]
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.Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu, Sichuan; 610209, China; 2.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, Sichuan; 610209, China; 3.University of Chinese Academy of Sciences, Beijing; 100049, China
推荐引用方式 GB/T 7714	Li, Zhenghan,Li, Xinyang. Fundamental performance of transverse wind estimator from Shack-Hartmann wave-front sensor measurements[J]. OPTICS EXPRESS,2018,26(9):11859-11876.
APA	Li, Zhenghan,&Li, Xinyang.(2018).Fundamental performance of transverse wind estimator from Shack-Hartmann wave-front sensor measurements.OPTICS EXPRESS,26(9),11859-11876.
MLA	Li, Zhenghan,et al."Fundamental performance of transverse wind estimator from Shack-Hartmann wave-front sensor measurements".OPTICS EXPRESS 26.9(2018):11859-11876.