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arXiv 2104.03003astro-ph.IM
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RAFTER:用于系外行星和相对论的环形天体测量场望远镜

RAFTER: Ring Astrometric Field Telescope for Exo-planets and Relativity

Alberto Riva, Mario Gai, Alberto Vecchiato, Deborah Busonero, Mario G. Lattanzi, Federico Landini, Zhaoxiang Qi, Zhenghong Tang

摘要:

高精度天体测量的目标是在高信噪比条件下,将源位置确定到衍射图像尺寸的非常小的一部分。这一目标的一个关键限制是望远镜在相当大的视场内的光学响应变化,这是确保任何选定目标的明亮参考物体所必需的。这个问题转化为严重的校准约束,和/或需要复杂的望远镜和焦平面计量。我们提出了一个创新的系统方法,从建立TMA望远镜的概念,扩展到实现高填充因子的环形视场的望远镜的光轴周围。拟议的设计是一个非常紧凑的,1米级的望远镜兼容现代CCD和CMOS探测器(EFL = 15米)。我们描述的概念,实施准则和当前的光学设计的光学性能。衍射极限视场超过1.25平方度,66个器件的探测器占据了最好的0.25平方度。

英文摘要:

High precision astrometry aims at source position determination to a very small fraction of the diffraction image size, in high SNR regime. One of the key limitations to such goal is the optical response variation of the telescope over a sizeable FOV, required to ensure bright reference objects to any selected target. The issue translates into severe calibration constraints, and/or the need for complex telescope and focal plane metrology. We propose an innovative system approach derived from the established TMA telescope concept, extended to achieve high filling factor of an annular field of view around the optical axis of the telescope. The proposed design is a very compact, 1 m class telescope compatible with modern CCD and CMOS detectors (EFL = 15 m). We describe the concept implementation guidelines and the optical performance of the current optical design. The diffraction limited FOV exceeds 1.25 square degrees, and the detector occupies the best 0.25 square degree with 66 devices.

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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