Design and analysis of supporting structure between the primary mirror and the secondary mirror on a space telescope

Chenjie Wang; Wenyi Chai; Liangjie Feng; Wengang Yang; Wei Wang; Xuewu Fan

doi:10.1117/12.2199672

8 October 2015 Design and analysis of supporting structure between the primary mirror and the secondary mirror on a space telescope

Chenjie Wang, Wenyi Chai, Liangjie Feng, Wengang Yang, Wei Wang, Xuewu Fan

Author Affiliations +

Proceedings Volume 9678, AOPC 2015: Telescope and Space Optical Instrumentation; 96780W (2015) https://doi.org/10.1117/12.2199672
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

Mechanical stability is a significant segment for an on-axis space telescope to assure its assembly accuracy as well as the image quality in the rigorous space environment, supporting structure between the primary mirror and the secondary mirror as a main structure of the on-axis space telescope must be designed reasonably to meet the mission requirements of the space telescope. Meanwhile, in view of the limitation of the satellite launching cost, it is necessary to reduce the weight and power compensation during the supporting structure design based on the satisfaction of telescope performance. Two types of supporting structure for a space telescope are designed, one is three-tripod structure which has three tripods located on the optical bench to support the secondary mirror assemblies and keep the distance between the primary mirror and the secondary mirror, the other is barrel supporting structure which includes a tube and a secondary mirror support with four spider struts. To compare the mechanical performance and launching cost of the two kinds of supporting structure, both structural and thermal analysis model are established. The analysis results indicates that the three-tripod support is lighter, has better mechanical performance and needs less power compensation than the barrel support.

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Chenjie Wang, Wenyi Chai, Liangjie Feng, Wengang Yang, Wei Wang, and Xuewu Fan "Design and analysis of supporting structure between the primary mirror and the secondary mirror on a space telescope", Proc. SPIE 9678, AOPC 2015: Telescope and Space Optical Instrumentation, 96780W (8 October 2015); https://doi.org/10.1117/12.2199672

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KEYWORDS

Mirrors

Space telescopes

Telescopes

Optical instrument design

Space mirrors

Control systems

Satellites

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