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Department自适应光学技术研究室(八室)
Transverse wind measurement with Shack-Hartmann wavefront sensor
Li, Zhenghan1,2,3; Li, Xinyang1,2
Source Publication2017 3rd IEEE International Conference on Computer and Communications, ICCC 2017
Pages2745-2751
2018-03-22
Language英语
DOI10.1109/CompComm.2017.8323033
Indexed ByEi
EI Accession Number20182805541119
SubtypeC
AbstractVelocity and direction of transverse wind are important parameters of atmospheric turbulence, largely determining the future wavefront pattern. Real time wind estimation contributes to predictive correction which is used to compensate for the time delay in the control systems of adaptive optics (AO) system. This paper presents two methods to estimate the transverse wind from wavefront reconstructed with Zernike modal using Shack-Hartmann wavefront sensor (SHWS). We compare the performances of block match method and optical flow method, as well as presenting a comprehensive error analysis. It is showed that the transverse wind estimation error will be minimum while optimal mode numbers were chosen. For both methods, the percent deviation of velocity estimation are kept within 30%, and the estimation error of wind direction are kept within 6 degree. The variances of the two methods increase with the slope measurement noise variances increasing. When the slope measurement noise is around 1 pixel, the variance of the transverse wind estimation approaches to theoretical lower bound, which indicates the estimation methods are efficient. According to the minimum estimation deviation, the optical flow method is preferable. Numerical results are used to verity the conclusions. © 2017 IEEE.
KeywordAdaptive control systems Atmospheric thermodynamics Atmospheric turbulence Delay control systems Errors Estimation Optical flows Real time systems Spurious signal noise Wavefronts
EI KeywordsAdaptive control systems ; Atmospheric thermodynamics ; Atmospheric turbulence ; Delay control systems ; Errors ; Estimation ; Optical flows ; Real time systems ; Spurious signal noise ; Wavefronts
Conference Name3rd IEEE International Conference on Computer and Communications, ICCC 2017
Conference DateDecember 13, 2017 - December 16, 2017
Conference PlaceChengdu, China
EI Classification Number443.1 Atmospheric Properties ; 722.4 Digital Computers and Systems ; 731.1 Control Systems ; 741.1 Light/Optics ; 921 Mathematics
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Document Type会议论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/9121
Collection自适应光学技术研究室(八室)
Affiliation1.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China;
2.Key Laboratory of Adaptive Optics, Chinese Academy of Sciences, Chengdu; 610209, China;
3.University of Chinese Academy of Sciences, Beijing; 100039, China
Recommended Citation
GB/T 7714
Li, Zhenghan,Li, Xinyang. Transverse wind measurement with Shack-Hartmann wavefront sensor[C],2018:2745-2751.
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