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Fundamental performance of transverse wind estimator from Shack-Hartmann wave-front sensor measurements
Li, Zhenghan1,2,3; Li, Xinyang1,2
Source PublicationOPTICS EXPRESS
Volume26Issue:9Pages:11859-11876
2018-04-30
Language英语
ISSN1094-4087
DOI10.1364/OE.26.011859
Indexed BySCI ; Ei
WOS IDWOS:000431718300070
EI Accession Number20181905147018
SubtypeJ
AbstractReal 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
KeywordAdaptive control systems Adaptive optics Delay control systems Iterative methods Real time systems
WOS KeywordADAPTIVE OPTICS CONTROL ; TURBULENCE ; PREDICTION
EI KeywordsAdaptive control systems ; Adaptive optics ; Delay control systems ; Iterative methods ; Real time systems
EI Classification Number722.4 Digital Computers and Systems ; 731.1 Control Systems ; 741.1 Light/Optics ; 921.6 Numerical Methods
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/9342
Collection自适应光学技术研究室(八室)
Affiliation1.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
Recommended Citation
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.
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