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题名:
Influence of Gaussian function index of deformable mirror on iterative algorithm adaptive optical system
作者: Cheng Sheng-Yi1,2,3; Chen Shan-Qiu1,3; Dong Li-Zhi1,3; Wang Shuai1,3; Yang Ping1,3; Ao Ming-Wu4; Xu Bing1
刊名: ACTA PHYSICA SINICA
出版日期: 2015-05-05
卷号: 64, 期号:9
关键词: Gaussian function index ; iterative matrix ; slope response matrix ; sparseness
文章类型: Article
英文摘要: Among all kinds of wavefront reconstruction algorithms in adaptive optical systems, the standard and mostly used algorithm is the direct gradient wavefront reconstruction algorithm. As the number of sub-apertures in Shack-Hartmann wavefront sensor and the actuators for deformable mirror increases, the reconstruction matrix in direct gradient wavefront reconstruction algorithm takes too much space and the number of multiplication in the algorithm increases sharply. So, the iterative algorithm is adopted in wavefront reconstruction for the high-resolution adaptive optical system. The number of multiplication and the required space of the iterative algorithm are directly related to the sparseness of both iterative matrix and slope response matrix. In an adaptive optical system, the sparseness of these two matrixes is connected with the system parameters. Therefore, it is necessary to study how to choose the proper parameters for an adaptive optical system when it uses iterative wavefront reconstruction algorithm. In this paper, the sparseness of slope response matrix and iterative matrix are analyzed based on a 613-actuator adaptive optical system. The influence of the Gaussian function index of deformable mirror on the sparsenesses of slope response matrix, iterative matrix, stability and correction qualities of the adaptive optical system are also studied under the condition of constant actuator spacing and coupling coefficient. A larger Gaussian function index results in a lower sparseness of the slope response matrix and the iterative matrix. Too large or too small a Gaussian function index will degrade the stability and the correction quality of an adaptive optical system. Finally, the optimal range of the Gaussian function index is provided by balancing the sparseness of slope response matrix, the correction quality, and the stability of the adaptive optical system.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Multidisciplinary
研究领域[WOS]: Physics
收录类别: SCI
语种: 英语
WOS记录号: WOS:000354605400018
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/2559
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Chengdu, Key Lab Adapt Opt, Chengdu 610209, Sichuan, Peoples R China
4.Univ Elect Sci & Technol China, Chengdu 610054, Sichuan, Peoples R China

Recommended Citation:
Cheng Sheng-Yi,Chen Shan-Qiu,Dong Li-Zhi,et al. Influence of Gaussian function index of deformable mirror on iterative algorithm adaptive optical system[J]. ACTA PHYSICA SINICA,2015,64(9).
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