Wide-band white light sparse-aperture Fizeau imaging interferometer testbed for a distributed small-satellites constellation

Jiang Aimin; Wang Sen; Dong Zhichao; Xue Jianwei; Wang Jingyu; Dai Yanfeng

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Wide-band white light sparse-aperture Fizeau imaging interferometer testbed for a distributed small-satellites constellation

机译：宽带白光稀疏孔径FIZEAU成像干涉干涉仪，用于分布式小卫星星座

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Under the background of astronomical observation by a distributed small-satellites constellation, a Fizeau imaging interferometer testbed (FIIT) was designed and constructed at National Astronomical Observatories of the Chinese Academy of Sciences in the past four years that achieved wide-band white light (400-700 nm) phased imaging at laboratory with a field of view (FOV) similar to 2 arcmin. This study presents the design of FIIT, which is mainly composed of a light source module for simulating infinite objects, three sub-telescopes in a Golay-3 distribution (i.e., equilateral triangle), three tip/tilt correction modules and optical path delay modules, as well as three detecting telescopes and one beam-combining telescope for phased imaging. The three detecting telescopes could determine the piston and tip/tilt errors, which could be compensated for by optical path delay modules and fast steering mirrors in a close-loop mode. The performance of FIIT is also derived analytically and simulated by a ray-tracing model. The tolerance analysis of the pupil geometry and magnification matching are also performed for achieving a better FOV. The optical test of each module could efficiently validate them to achieve diffraction limit imaging. The preliminary experimental results for both point source and extend scene could sufficiently demonstrate the phased mode imaging of FIIT, thus validating the good prospects of this technique in the future. (C) 2018 Optical Society of America

机译：在分布式小卫星星座的天文观测背景下，在过去四年中，设计并构建了宽带白光的中国科学院的国家天文学观察员（FIIT），设计和建造了一项Fizau成像干涉仪（FIIT）的设计和建造（400 -700 nm）在实验室中分阶段成像，具有类似于2个arcmin的视野（FOV）。本研究介绍了FII的设计，主要由光源模块组成，用于模拟无限物体的三个子望远镜（即等边三角形），三个尖端/倾斜校正模块和光路延迟模块中的三个子望远镜以及三个检测望远镜和一个用于分阶段成像的一个横梁组合望远镜。三个检测望远镜可以确定活塞和尖端/倾斜误差，这可以通过光路径模块和闭环模式中的快速转向镜来补偿。 FIIT的性能也通过光线跟踪模型进行了分析和模拟。还对瞳孔几何和放大匹配的公差分析用于实现更好的FOV。每个模块的光学测试可以有效地验证它们以实现衍射限制成像。两个点源和延伸场景的初步实验结果可以充分地证明FIIT的分阶段模拟成像，从而验证了未来该技术的良好前景。（c）2018年光学学会

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来源
《Applied optics》 |2018年第11期|共11页
作者
Jiang Aimin; Wang Sen; Dong Zhichao; Xue Jianwei; Wang Jingyu; Dai Yanfeng;
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Chinese Acad Sci Natl Astron Observ NAOC Space Astron &

Technol Lab Beijing 100012 Peoples R China;

Chinese Acad Sci Natl Astron Observ NAOC Space Astron &

Technol Lab Beijing 100012 Peoples R China;

Chinese Acad Sci Natl Astron Observ NAOC Space Astron &

Technol Lab Beijing 100012 Peoples R China;

Chinese Acad Sci Natl Astron Observ NAOC Space Astron &

Technol Lab Beijing 100012 Peoples R China;

Chinese Acad Sci Natl Astron Observ NAOC Space Astron &

Technol Lab Beijing 100012 Peoples R China;

Chinese Acad Sci Natl Astron Observ NAOC Space Astron &

Technol Lab Beijing 100012 Peoples R China;

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正文语种 eng
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Wide-band white light sparse-aperture Fizeau imaging interferometer testbed for a distributed small-satellites constellation

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