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Development status on the real-time controller for solar multi-conjugate adaptive optics system

机译：太阳能多共轭自适应光学系统实时控制器的发展现状

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摘要

Solar observations are performed over an extended field of view(FoV) and the isoplanatic patch which conventional adaptive optics (AO) provides diffraction limited resolution is a severe limitation. Multi-conjugate Adaptive Optics (MCAO) can be used to extend the corrected FoV of AO system. Compared to AO, MCAO which usually utilizes a wide-field Shack-Hartmann wavefront sensor to control multiple deformable mirrors(DMs) is more complicated. Because the Sun is an extended object, correlation algorithms are applied to detect gradients in solar MCAO system. Moreover, due to the fast evolving daytime seeing conditions and the fact that much science has to be done at visible wavelengths, a very high closed-loop bandwidth is also required. The computation and delay development of the realtime controller(RTC) in solar MCAO system is more challenging than that in night-time MCAO system. This paper reviews the solar MCAO techniques and systems in the world, especially emphasizes the framework and implementation of the RTC. The development of MCAO in China is also introduced. An outlook of the RTC for the solar MCAO system in development is given.
机译：太阳观测是在扩展视场（FoV）上进行的，而传统自适应光学（AO）提供衍射受限分辨率的等平面斑块是一个严重的局限。多共轭自适应光学（MCAO）可用于扩展AO系统的校正FoV。与AO相比，MCAO通常利用宽视野的Shack-Hartmann波前传感器来控制多个可变形反射镜（DM）。由于太阳是扩展对象，因此将相关算法应用于检测太阳MCAO系统中的梯度。此外，由于日间观看条件的快速发展以及必须在可见波长下进行大量科学工作的事实，还需要非常高的闭环带宽。与夜间MCAO系统相比，太阳能MCAO系统中实时控制器（RTC）的计算和延迟开发更具挑战性。本文回顾了世界上的太阳能MCAO技术和系统，特别强调了RTC的框架和实施。还介绍了MCAO在中国的发展。给出了正在开发的太阳能MCAO系统的RTC前景。

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