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12 July 2019 The design and assembly of a long-focal-length telescope with aluminum mirrors
Shenq-Tsong Chang, Yu-Chuan Lin, Chun-Chieh Lien, Ting-Ming Huang, Ho-Lin Tsay, Jiun-Jih Miau
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Proceedings Volume 11180, International Conference on Space Optics — ICSO 2018; 111806U (2019) https://doi.org/10.1117/12.2536165
Event: International Conference on Space Optics - ICSO 2018, 2018, Chania, Greece
Abstract
Three-mirror-anastigmat (TMA) telescopes have been widely used in long-focal length payloads especially in space due to its excellent features for correcting aberrations, wide spectral range and shorter physical requirement. This paper describes the assembly results of the telescope that may be used in the payload of Formosat-5 follow-on mission. The telescope was a pathfinding one that was designed according to the target specifications of National Space Organization. Optical design is of Korsch type with three mirrors in the system, which is different from that in Formosat-5 RSI. Mechanical design and assembly procedures require modification from those of Formosat-5 accordingly. focal length of the telescope was 7714 mm and F-number 14. Diamond-turned aluminum mirrors were adopted due to time and budget constraint. Barrel was selected as structure configuration between primary and secondary mirrors, while struts were designed to support the tertiary mirror. A main plate was used to connect the barrel and struts. Analysis of the structure has been performed.
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Shenq-Tsong Chang, Yu-Chuan Lin, Chun-Chieh Lien, Ting-Ming Huang, Ho-Lin Tsay, and Jiun-Jih Miau "The design and assembly of a long-focal-length telescope with aluminum mirrors", Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 111806U (12 July 2019); https://doi.org/10.1117/12.2536165
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KEYWORDS
Mirrors
Telescopes
Aluminum
Assembly tolerances
Optical instrument design
Tolerancing
Aberration correction
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