标题： 关于理解AO系统与凯克望远镜上向量泽尼克波前传感器的分段共相之间的相互作用 显示英文标题

标题： Towards understanding interactions between the AO system and segment co-phasing with the vector-Zernike wavefront sensor on Keck

摘要： 我们扩展了之前关于在凯克望远镜上首次演示主镜段闭环控制的工作，使用的是一个矢量泽尼克波前传感器（vZWFS），该传感器使NIRC2科学相机的斯托列洛比提高了多达10个百分点。段共相误差会限制凯克望远镜的对比度，并且对于分块式极大望远镜和未来的空间任务来说是必须修正的。凯克望远镜上的后端自适应光学（AO）矢量泽尼克波前传感器（post-AO vZWFS）的目标是在科学观测的同时监测并校正段共相误差。泽尼克波前传感器（ZWF S）非常适合测量相位不连续性，并且是最灵敏的波前传感器之一，但它的动态范围有限。凯克望远镜的vZWFS由一个超表面掩模组成，它对正交偏振施加两种不同的相位移，分裂成两个孔径图像，从而扩展了其动态范围。我们报告了vZWFS闭环共相性能以及理解自适应光学系统与段共相之间相互作用的早期工作。我们讨论了当通过对齐段边缘（目前在凯克望远镜上所做的）进行共相时，与通过对齐各段的平均相位（由vZWFS完成）时，自适应光学性能的比较。 显示英文摘要

摘要： We extend our previous demonstration of the first on-sky primary mirror segment closed-loop control on Keck using a vector-Zernike wavefront sensor (vZWFS), which improved the Strehl ratio on the NIRC2 science camera by up to 10 percentage points. Segment co-phasing errors contribute to Keck contrast limits and will be necessary to correct for the segmented Extremely Large Telescopes and future space missions. The goal of the post-AO vZWFS on Keck is to monitor and correct segment co-phasing errors in parallel with science observations. The ZWFS is ideal for measuring phase discontinuities and is one of the most sensitive WFSs, but has limited dynamic range. The Keck vZWFS consists of a metasurface mask imposing two different phase shifts to orthogonal polarizations, split into two pupil images, extending its dynamic range. We report on the vZWFS closed-loop co-phasing performance and early work towards understanding the interactions between the AO system and segment phasing. We discuss a comparison of the AO performance when co-phasing by aligning segment edges, as is currently done at Keck, compared with aligning to the average phase over the segments, as is done by the vZWFS.