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Proceedings Paper

Structure and mechanical design for a large-aperture telescope
Author(s): Yufeng Tan; Jihong Wang; Ge Ren; Xiaoli Ren; Zongliang Xie; Dong Li
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Paper Abstract

For a better understanding and forecasting of the universe, the high resolution observations are needed. The largeaperture telescope is an integrated success with a combination of material, mechanics, optics and electronics. The telescope is a classic Cassegrain configuration with open structure, alt-azimuth mount, and retractable dome. The instrumentation has a rotating mass of approximately 52 tons and stands over 9 m tall. The 3-m aperture primary mirror is a honeycomb lightweighted mirror with fused silica material and active cooling. The paper will address preliminary design and development of the telescope mount structure, axes drive system, encoder mount and primary mirror system. The structure must have the best performance of stiffness and stability to demand an acceptable image quality. As the largest optical element of the telescope, primary mirror must be well controlled and protected both during operational and non-operational periods. An active cooling system of primary mirror is provided by a flushing subsystem at the front side and sucking subsystem on the central hole to keep the temperature of the facesheet close to that of ambient air. A two-layer mirror cover mounted on the elevation ring is proposed to protect the optical elements and inner beam tube from dust, dirt and debris. Furthermore, the latest plans for future upgrades will be also described.

Paper Details

Date Published: 20 February 2018
PDF: 10 pages
Proc. SPIE 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 1069734 (20 February 2018); doi: 10.1117/12.2314933
Show Author Affiliations
Yufeng Tan, Institute of Optics and Electronics (China)
Univ. of Chinese Academy of Sciences (China)
Jihong Wang, Institute of Optics and Electronics (China)
Ge Ren, Institute of Optics and Electronics (China)
Xiaoli Ren, Institute of Optics and Electronics (China)
Univ. of Chinese Academy of Sciences (China)
Zongliang Xie, Institute of Optics and Electronics (China)
Univ. of Chinese Academy of Sciences (China)
Dong Li, Institute of Optics and Electronics (China)
Univ. of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 10697:
Fourth Seminar on Novel Optoelectronic Detection Technology and Application
Weiqi Jin; Ye Li, Editor(s)

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