题名: Comparison between iterative wavefront control algorithm and direct gradient wavefront control algorithm for adaptive optics system

作者: Cheng, Sheng-Yi ^{1,2,3} ; Liu, Wen-Jin ^{1,3} ; Chen, Shan-Qiu ^{1,3} ; Dong, Li-Zhi ^{1,3} ; Yang, Ping ^{1,3} ; Xu, Bing ^{1}
刊名: Chinese Physics B
出版日期: 2015
卷号: 24, 期号: 8, 页码: 84214 学科分类: Actuators - Adaptive control systems - Algorithms - Computational complexity - Deformation - Information dissemination - Iterative methods - Matrix algebra - Mirrors - Wavefronts
DOI: 10.1088/1674-1056/24/8/084214
通讯作者: Xu, Bing
文章类型: 期刊论文
中文摘要: Among all kinds of wavefront control algorithms in adaptive optics systems, the direct gradient wavefront control algorithm is the most widespread and common method. This control algorithm obtains the actuator voltages directly from wavefront slopes through pre-measuring the relational matrix between deformable mirror actuators and Hartmann wavefront sensor with perfect real-time characteristic and stability. However, with increasing the number of sub-apertures in wavefront sensor and deformable mirror actuators of adaptive optics systems, the matrix operation in direct gradient algorithm takes too much time, which becomes a major factor influencing control effect of adaptive optics systems. In this paper we apply an iterative wavefront control algorithm to high-resolution adaptive optics systems, in which the voltages of each actuator are obtained through iteration arithmetic, which gains great advantage in calculation and storage. For AO system with thousands of actuators, the computational complexity estimate is about O(n2) ∼ O(n3) in direct gradient wavefront control algorithm, while the computational complexity estimate in iterative wavefront control algorithm is about O(n) ∼ (O(n)3/2), in which n is the number of actuators of AO system. And the more the numbers of sub-apertures and deformable mirror actuators, the more significant advantage the iterative wavefront control algorithm exhibits. © 2015 Chinese Physical Society and IOP Publishing Ltd.
英文摘要: Among all kinds of wavefront control algorithms in adaptive optics systems, the direct gradient wavefront control algorithm is the most widespread and common method. This control algorithm obtains the actuator voltages directly from wavefront slopes through pre-measuring the relational matrix between deformable mirror actuators and Hartmann wavefront sensor with perfect real-time characteristic and stability. However, with increasing the number of sub-apertures in wavefront sensor and deformable mirror actuators of adaptive optics systems, the matrix operation in direct gradient algorithm takes too much time, which becomes a major factor influencing control effect of adaptive optics systems. In this paper we apply an iterative wavefront control algorithm to high-resolution adaptive optics systems, in which the voltages of each actuator are obtained through iteration arithmetic, which gains great advantage in calculation and storage. For AO system with thousands of actuators, the computational complexity estimate is about O(n2) ∼ O(n3) in direct gradient wavefront control algorithm, while the computational complexity estimate in iterative wavefront control algorithm is about O(n) ∼ (O(n)3/2), in which n is the number of actuators of AO system. And the more the numbers of sub-apertures and deformable mirror actuators, the more significant advantage the iterative wavefront control algorithm exhibits. © 2015 Chinese Physical Society and IOP Publishing Ltd.
收录类别: SCI
; Ei
项目资助者: National Key Scientific and Research Equipment Development Project of China [ZDYZ2013-2]
; National Natural Science Foundation of China [11173008]
; Sichuan Provincial Outstanding Youth Academic Technology Leaders Program, China [2012JQ0012]
语种: 英语
WOS记录号: WOS:000361906000043
ISSN号: 1674-1056
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内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/6418
Appears in Collections: 自适应光学技术研究室（八室）_期刊论文

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作者单位: 1. Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, China 2. Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu, China 3. University of the Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Cheng, Sheng-Yi,Liu, Wen-Jin,Chen, Shan-Qiu,et al. Comparison between iterative wavefront control algorithm and direct gradient wavefront control algorithm for adaptive optics system[J]. Chinese Physics B,2015,24(8):84214.