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arXiv 2103.02297astro-ph.IM
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焦平面辅助的金字塔波前传感器:实现逐帧光学增益跟踪

The focal-plane assisted pyramid wavefront sensor: enabling frame-by-frame optical gains tracking

Vincent Chambouleyron, Olivier Fauvarque, Jean-François Sauvage, Benoît Neichel, Thierry Fusco

摘要:

金字塔波前传感器(Pyramid wavefront sensor,PyWFS)以其高灵敏度成为天文自适应光学(adaptive optics,AO)系统中的一种优势传感器。然而,该传感器表现出显著的非线性行为,导致具有挑战性的AO控制问题。为了减轻这些影响,我们建议使用,除了经典的金字塔传感器,焦平面图像结合卷积描述的传感器来执行快速跟踪的PyWFS非线性,所谓的光学增益(OG)。我们表明,这种额外的焦平面成像路径只需要一小部分的总通量,同时代表一个强大的解决方案来估计PyWFS OG。最后,我们展示了我们的方法所带来的增益与引导和非共同路径像差(NCPA)处理的具体例子。

英文摘要:

With its high sensitivity, the Pyramid wavefront sensor (PyWFS) is becoming an advantageous sensor for astronomical adaptive optics (AO) systems. However, this sensor exhibits significant non-linear behaviours leading to challenging AO control issues. In order to mitigate these effects, we propose to use, in addition to the classical pyramid sensor, a focal plane image combined with a convolutive description of the sensor to perform a fast tracking of the PyWFS non-linearities, the so-called optical gains (OG). We show that this additional focal plane imaging path only requires a small fraction of the total flux, while representing a robust solution to estimate the PyWFS OG. Finally, we demonstrate the gain brought by our method with the specific examples of bootstrap and Non-Common Path Aberrations (NCPA) handling.

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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