发表机构
University of Victoria; NRC Herzberg Astronomy and Astrophysics Research Centre; Université de Sherbrooke（维多利亚大学; 国家研究委员会赫尔伯格天文学和天体物理学研究中心; 舍布鲁克大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究在REVOLT AO测试台安装SPAD阵列实现96 kHz在轨成像，分析AO系统PSF高频行为，发现高帧率成像可提升PSF性能。
AI 中文摘要
需要极高角分辨率的天文观测依赖先进的自适应光学（AO）系统来克服大气造成的模糊问题。除了用这些系统获得更锐利的点扩散函数（PSF）外，还能表征所得PSF随时间和波长的变化，这很有意义。我们在 Dominion Astrophysical Observatory 的 REVOLT AO 测试台焦平面上安装了商用单光子雪崩二极管（SPAD）阵列，使我们能以高达96 kHz的速率观测该系统的可见光PSF，提供了约为AO系统自身频率100倍的PSF时间分辨视图。我们利用该探测器分析AO系统PSF的高频行为，包括残余倾斜和变形镜响应，还探究了AO辅助幸运成像的性能，即仅对图像质量最佳的帧进行平均。我们发现，高帧率成像能显著提升PSF，超越AO系统的固有能力。
英文摘要
Astronomical observations requiring extremely high angular resolution necessitate advanced adaptive optics (AO) systems to overcome blurring caused by the atmosphere. In addition to obtaining much sharper point-spread functions (PSFs) with these systems, it is beneficial to be able to characterize the behaviour of the resulting PSF across time and wavelength. We have installed a commercially-available Single-photon avalanche diode (SPAD) array on the focal plane of the REVOLT AO testbench at the Dominion Astrophysical Observatory, allowing us to observe the visible PSF of the system at rates up to 96 kHz. This provides a time-resolved view of the PSF at $\sim$100 times the frequency of the AO system itself. We use this detector to analyze the high-frequency behaviour of the PSF of the AO system, including residual tip/tilt and deformable mirror response. We also explore the performance of AO-assisted lucky imaging, in which we average together only the frames which result in the best image quality. We find that high-framerate imaging can significantly improve the PSF beyond the native capabilities of the AO system.
Comments13 pages, 13 figures. Presented at SPIE 2026
Journal refProc. SPIE (2026) 1415723
