Piston error detection and closed-loop control based on fringe contrast measurement applied to a kind of interferometric imaging telescope with four apertures

Yuanyuan Ding; Xinyang Chen; Congcong Zhang; Lixin Zheng; Chaoyan Wang; Dan Zhou; Lurun Shen; Qi Wang; Jianqing Cai; Zhendong Chen

doi:10.1117/12.3019540

28 August 2024 Piston error detection and closed-loop control based on fringe contrast measurement applied to a kind of interferometric imaging telescope with four apertures

Yuanyuan Ding, Xinyang Chen, Congcong Zhang, Lixin Zheng, Chaoyan Wang, Dan Zhou, Lurun Shen, Qi Wang, Jianqing Cai, Zhendong Chen

Author Affiliations +

Proceedings Volume 13095, Optical and Infrared Interferometry and Imaging IX; 1309530 (2024) https://doi.org/10.1117/12.3019540
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Accurate piston error detection and closed-loop control are one of the key technologies to ensure the imaging quality of the interferometric imaging telescope. In this paper, we proposed a piston error detection and control scheme based on three computers and multithreading,which has been successfully applied to a four 0.1-m apertures interferometric telescope. This scheme adopts a kind of fringe contrast measurement and climbing method to achieve closed-loop control. The results implied that the fringe contrast can be raised through piston closed-loop correction. Compared with a single telescope with 0.1-m aperture, we can get a 2.63x improvement in resolution for the new interferometric telescope with four 0.1-m apertures. It is proved that the feasibility and effectiveness of this scheme. We will further carry out astronomical observation experiments and improve the piston error detection and control scheme, in order to provide technical guarantees for the implementation of interferometric imaging telescopes.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Yuanyuan Ding, Xinyang Chen, Congcong Zhang, Lixin Zheng, Chaoyan Wang, Dan Zhou, Lurun Shen, Qi Wang, Jianqing Cai, and Zhendong Chen "Piston error detection and closed-loop control based on fringe contrast measurement applied to a kind of interferometric imaging telescope with four apertures", Proc. SPIE 13095, Optical and Infrared Interferometry and Imaging IX, 1309530 (28 August 2024); https://doi.org/10.1117/12.3019540

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