Distributed modal command for a two-deformable-mirror adaptive optics system
Distributed modal command for a two-deformable-mirror adaptive optics system
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DOI：
10.1364/ao.46.004329
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发表时间：
2007-07-10
期刊：
影响因子：
1.9
通讯作者：
Blain, C.
中科院分区：
文献类型：
--
作者：
Conan, R.;Bradley, C.;Blain, C.
未来的单高度共轭自适应光学系统的设计可能包括至少两个可变形反射镜，而不是像当前的AO系统中的一个。每个DM将必须针对特定的空间频率范围进行校正。提出了一种基于DM的影响函数推导DM模态基的方法。导出模态基，使得它们正交于将DM校正限制到空间频域的给定模式集合。模态基地已在低音高音测试台在维多利亚大学。已经示出，当在两种情况下以相同的性能从区域驱动的闭环转换到模态驱动的闭环时，低音扬声器DM和高音扬声器DM冲程的rms幅度可以分别减小3倍和9倍。(C)2007年，美国光学学会。
The design of future single-altitude conjugated adaptive optics (AO) systems may include at least two deformable mirrors (DMs) instead of one as in the current AO system. Each DM will have to correct for a specific spatial frequency range. A method is presented to derive a DM modal basis based on the influence functions of the DM. The modal bases are derived such that they are orthogonal to a given set of modes that restrict the DM correction to a spatial frequency domain. The modal bases have been tested on the woofer-tweeter test bench at the University of Victoria. It has been shown that the rms amplitude of the woofer DM and tweeter DM stroke can be reduced by factors of 3 and 9, respectively, when making the transition from a zonal-driven closed loop to a modal-driven closed loop with the same performance in both cases. (C) 2007 Optical Society of America.