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Proceedings Paper

Performance comparison between two active support schemes for 1-m primary mirror
Author(s): Dongsheng Niu; Guomin Wang; Bozhong Gu
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Paper Abstract

Active support scheme may decide the deformation of the optical surface figure of the primary mirror. Two active support schemes have been designed for 1-m primary mirror, and the performance of each support scheme is conducted. Finite element analysis (FEA) is employed to analyze the optical surface figures of the primary mirror, and optimizations are carried out by using ANSYS for each support scheme to obtain the locations of the axial support. When the locations are determined, axial support force sensitivities are calculated for the two support schemes in a case that a single axial support has a force error of 0.5N. The correction ability of the active support system for both of support schemes are analyzed when an arbitrary axial support is failure. Several low order Zernike modes are modeled with MATLAB procedure, and active optics corrections are applied to these modes for the two active supports. Thermal deformation of the mirror is also corrected for the two schemes.

Paper Details

Date Published: 17 September 2012
PDF: 8 pages
Proc. SPIE 8444, Ground-based and Airborne Telescopes IV, 844450 (17 September 2012); doi: 10.1117/12.924948
Show Author Affiliations
Dongsheng Niu, Nanjing Institute of Astronomical Optics & Technology (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Guomin Wang, Nanjing Institute of Astronomical Optics & Technology (China)
Bozhong Gu, Nanjing Institute of Astronomical Optics & Technology (China)

Published in SPIE Proceedings Vol. 8444:
Ground-based and Airborne Telescopes IV
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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