The Strehl Efficiency of Adaptive Optics Systems
The Strehl Efficiency of Adaptive Optics Systems
复制标题
自适应光学系统的 Strehl 效率
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
R. Racine
中科院分区：
文献类型：
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作者：
R. Racine
通过19个不同尺寸的自适应光学（AO）系统，实现了明亮的导星上的斯特列尔比检查。这两种类型的系统表现出类似的更强的衰减仪器像差与较小的子孔径。在波前传感器子孔径数量相同的情况下，通常发现曲率系统在衰减湍流引起的光学相位变化方面比Shack-Hartmann系统更有效。因此，曲率系统使用较暗的引导星来实现与Shack-Hartmann系统相同的性能。对于较大的系统，对比更强烈。这些差异的可能原因进行了讨论。非共光路像差的校准误差似乎是最重要的。对导星星像本身的补偿似乎对大曲率系统是有利的。简要讨论了未来超大型系统的可能性能。呼吁鼓励天文AO团队统一和优化其系统的天空性能。
Strehl ratios achieved on bright guide stars by 19 adaptive optics (AO) systems of various dimensions are examined. Both types of systems exhibit a similarly stronger attenuation of instrumental aberrations with smaller subapertures. With the same number of wave‐front sensor subapertures, curvature systems are generally found to be more efficient than Shack‐Hartmann systems at attenuating turbulence‐induced optical phase variance. Consequently, curvature systems use fainter guide stars to achieve the same performance as Shack‐Hartmann systems. The contrast is stronger for larger systems. Possible causes of these differences are discussed. Calibration errors of non–common‐path aberrations appear to be the most important. The compensation of the guide star image itself seems to be beneficial for large curvature systems. The likely performance of future very large systems are briefly discussed. A plea is made to encourage astronomical AO teams to uniformly and optimally characterize the on‐sky performance of their systems.