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Comparison between iterative wavefront control algorithm and direct gradient wavefront control algorithm for adaptive optics system
Cheng, Sheng-Yi1,2,3; Liu, Wen-Jin1,3; Chen, Shan-Qiu1,3; Dong, Li-Zhi1,3; Yang, Ping1,3; Xu, Bing1
Source PublicationChinese Physics B
Volume24Issue:8Pages:84214
2015
Language英语
ISSN1674-1056
DOI10.1088/1674-1056/24/8/084214
Indexed BySCI ; Ei
WOS IDWOS:000361906000043
Subtype期刊论文
AbstractAmong 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.; 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.
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/6418
Collection自适应光学技术研究室(八室)
Corresponding AuthorXu, Bing
Affiliation1. 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
GB/T 7714
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.
APA Cheng, Sheng-Yi,Liu, Wen-Jin,Chen, Shan-Qiu,Dong, Li-Zhi,Yang, Ping,&Xu, Bing.(2015).Comparison between iterative wavefront control algorithm and direct gradient wavefront control algorithm for adaptive optics system.Chinese Physics B,24(8),84214.
MLA Cheng, Sheng-Yi,et al."Comparison between iterative wavefront control algorithm and direct gradient wavefront control algorithm for adaptive optics system".Chinese Physics B 24.8(2015):84214.
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