Design and analysis of structure of large aperture three-mirror off-axis optical system

Ke-jun Wang; Ji-hong Dong; Wei Li; Quan-feng Guo; Yan-chun Li; Wei-guo Zhao; Xiaotao Cao; Hai-ping Wang

doi:10.1117/12.975219

15 October 2012 Design and analysis of structure of large aperture three-mirror off-axis optical system

Ke-jun Wang, Ji-hong Dong, Wei Li, Quan-feng Guo, Yan-chun Li, Wei-guo Zhao, Xiaotao Cao, Hai-ping Wang

Proceedings Volume 8415, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 841510 (2012) https://doi.org/10.1117/12.975219
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

Abstract

On the basis of characteristics of optical system of Large aperture three-mirror off-axis, the mirrors’ support structure and the overall frame structure of the optical system was designed and investigated, the first and foremost is the lightweight of the support structure and the overall frame structure, the structure design of the three-mirror off-axis optical system was completed, which characteristic is integrative design of the overall frame structure , also the 3D model of the structure of the optical system was built, by means of the finite element analysis techniques, the modal analysis was done to the overall structure, the analysis results indicate that the first natural frequency of the overall structure is 162Hz，which is higher than 120 Hz requested by the overall structure of the optical system ,the overall structure have a high enough dynamic stiffness and reasonable distribution of modal, which ensure the overall structure in transportation and launch process to withstand severe vibration condition, and the shape error variation RMS and PV of optical mirror which are important indexes of image quality under the comprehensive influence of gravity and thermal load which is in the control range meet the design index.

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Ke-jun Wang, Ji-hong Dong, Wei Li, Quan-feng Guo, Yan-chun Li, Wei-guo Zhao, Xiaotao Cao, and Hai-ping Wang "Design and analysis of structure of large aperture three-mirror off-axis optical system", Proc. SPIE 8415, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 841510 (15 October 2012); https://doi.org/10.1117/12.975219

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KEYWORDS

Mirrors

Off axis mirrors

Structural design

Optical design

Tolerancing

Cameras

3D modeling

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