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arXiv 1207.2801astro-ph.IMastro-ph.SR
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用于太阳望远镜的层定向自适应光学

Layer-oriented adaptive optics for solar telescopes

Aglae Kellerer

摘要:

第一个多共轭自适应光学系统目前正在安装在太阳望远镜上。这些系统的目的是相对于传统的自适应光学增加校正的视场。然而,这第一代是基于一个面向恒星的方法,它是很难增加的视场直径超过60”-80”的大小。我们建议通过使用与最强湍流层共轭的宽场Shack-Hartmann波前传感器来实现太阳MCAO中的层定向方法。波前畸变在宽视场上平均:来自远处湍流的信号被衰减,因此光学地进行层析重建。该系统由独立的校正回路组成,只需要考虑局部湍流:子孔径可以被放大,校正频率可以被降低。最重要的是,星形MCAO系统随着场尺寸的增加而变得更加复杂,而面向层的方法受益于更大的场,因此将成为未来一代太阳能MCAO系统的有吸引力的解决方案。

英文摘要:

First multi-conjugate adaptive-optical (MCAO) systems are currently being installed on solar telescopes. The aim of these systems is to increase the corrected field-of-view with respect to conventional adaptive optics. However, this first generation is based on a star-oriented approach, and it is then difficult to increase the size of the field-of-view beyond 60"-80" in diameter. We propose to implement the layer-oriented approach in solar MCAO by use of wide-field Shack-Hartmann wavefront sensors conjugated to the strongest turbulent layers. The wavefront distortions are averaged over a wide-field: the signal from distant turbulence is attenuated and the tomographic reconstruction is thus done optically. The system consists of independent correction loops, that only need to account for local turbulence: the sub-apertures can be enlarged and the correction frequency reduced. Most importantly, a star-oriented MCAO system becomes more complex with increasing field size, while the layer-oriented approach benefits from larger fields - and will therefore be an attractive solution for the future generation of solar MCAO systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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