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Proceedings Paper

Deformation analysis of a lightweight metal mirror
Author(s): Jianwei Zhou; Wumei Lin; Guoqing Liu; Tingwen Xing
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Paper Abstract

The weight of the optical elements of a system used in the aviation and aerospace industry must be as light as possible, on condition that the imaging performance of the system satisfies user’s demand. However, optical elements will deform easily under internal or external pressure if it becomes thinner, and then influences the imaging performance of the whole optical system. In this paper, the main mirror of the Cassegrain system is studied with finite-element analysis (FEA) to predict its surface deformation through simulating its working conditions. The surface deformation is also tested and analyzed after machining and mounting. The obtained interferometric data, Zernike coefficients, is written into CODE V, an excellent software for designing optical systems, to analyze the imaging performance of the designed optical system. Through analyzing the deformation of the metal mirror it can be found that the maxima RMS change of the whole optical system is 0.0059λ, which is only 1.52 percent of the designed value. In the full field of view, the RMS error is less than 0.07λ, that means the imaging performance of the whole optical system is close to the diffraction limit.

Paper Details

Date Published: 10 February 2005
PDF: 7 pages
Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); doi: 10.1117/12.574693
Show Author Affiliations
Jianwei Zhou, Institute of Optics and Electronics, CAS (China)
Wumei Lin, Institute of Optics and Electronics, CAS (China)
Guoqing Liu, Institute of Optics and Electronics, CAS (China)
Tingwen Xing, Institute of Optics and Electronics, CAS (China)


Published in SPIE Proceedings Vol. 5638:
Optical Design and Testing II
Yongtian Wang; Zhicheng Weng; Shenghua Ye; Jose M. Sasian, Editor(s)

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