Adaptive optics system based on the Southwell geometry and Improvement on control stability

	Adaptive optics system based on the Southwell geometry and Improvement on control stability
	Wang, L.; X. D. Lin; X. Y. Liu and P. F. Wei
	2017
发表期刊	Optics Communications
卷号	390
摘要	An adaptive optics (AO) system has advantages of avoiding waffle modes and ease to assemble, when the lenslets of the Shack-Hartmann wavefront sensor (SH-WFS) and the actuators of the deformable mirror (DM) are configured according to the Southwell geometry. However, an AO system which follows the Southwell geometry suffers from the calibration difficulty and from the poor control stability. In this paper, an AO system based on the Southwell configuration is built up and experimentally demonstrated. The calibration problem is solved by adopting a DM which has an appropriate inter-actuator coupling, so that the movement of an actuator can be measured by the neighboring lenslets. The control stability is evaluated by the error propagators, and then, the control stability can be improved by filtering out smaller singular values of the response matrix. It is also shown that a tradeoff between the bandwidth error and the fitting error of an AO system can be made according to the error propagator. Finally, the performance measurement experiments indicate the reasonable ranges for the number of reserved singular values of the response matrix and the integrator gain, i.e. from 81 to 89, and from 0.2 to 0.5, respectively.
收录类别	sci ; ei
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/59258
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Wang, L.,X. D. Lin,X. Y. Liu and P. F. Wei. Adaptive optics system based on the Southwell geometry and Improvement on control stability[J]. Optics Communications,2017,390.
APA	Wang, L.,X. D. Lin,&X. Y. Liu and P. F. Wei.(2017).Adaptive optics system based on the Southwell geometry and Improvement on control stability.Optics Communications,390.
MLA	Wang, L.,et al."Adaptive optics system based on the Southwell geometry and Improvement on control stability".Optics Communications 390(2017).

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