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Chunling He

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Proceedings Article | 29 December 2023 Paper

Optomechanical system design of the solar upper transition region imager

Zhanshan Wang, Chunling He, Jun Yu, Runze Qi, Yifan Wang

Proceedings Volume 12976, 1297604 (2023) https://doi.org/10.1117/12.2691736

KEYWORDS: Tunable filters, Telescopes, Mirrors, Imaging systems, Device simulation, Design and modelling, Satellites, Mirror surfaces, Frequency response, Vibration

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The Solar Upper Transition Region Imager (SUTRI) is an extreme ultraviolet solar imaging telescope that focuses on dynamically observing the solar transition region within a narrow band at 46.5nm. This paper describes the optical parameters, optomechanical structural design, finite element simulation, and on-ground environmental testing. To satisfy the narrow band requirement, the telescope employs multilayers coated on Ritchey-Chrétien optics and filters mounted at the front aperture and ahead of the focal plane. The primary and secondary mirrors are glued to invar frames that provide peripheral support. The telescope contains three mechanisms, which are a focus mechanism, a filter wheel, and a front door. In addition, this paper carried out finite element simulation of modal analysis, optical performance and structural strength. These simulations verified that the opto-mechanical system design is feasible. Finally, the telescope successfully underwent a series of on-ground environmental testing and was subsequently launched carried by SATech-01 satellite in July 2022.

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