Mechanical analysis and experiment study of a &#934;1m paraboloidal mirror

Yongwei Guo; Shimo Yang; Xuedong Gu; Shen Wang

doi:10.1117/12.674095

30 May 2006 Mechanical analysis and experiment study of a Φ1m paraboloidal mirror

Yongwei Guo, Shimo Yang, Xuedong Gu, Shen Wang

Proceedings Volume 6148, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 61480K (2006) https://doi.org/10.1117/12.674095
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China

Abstract

The 1m diameter paraboloidal primary mirror of the Space Solar Telescope, while in orbit, is positioned by three support points, and while in its vertical alignment on the ground, is unloaded by temporary supports of astatic lever and Hindle plate. It is crucial to confirm the unloading force in the support. It is also important to conduct the precision analysis of the unloading force. The relationship between the surface error and the unloading forces is founded from Hooke's law, among which the parameters and initial conditions are calculated by Finite Element Method. By the relationship, the optimized force value can be calculated by iterative operation, and the range of the unloading forces, which is the base of the precision analysis of the unloading support mechanism, can be also deduced. A precision analysis for the unloading support mechanism is given. Autocollimation tests show that the primary's surface error is less than 1/40λ (RMS, λ=633nm), which proves the analysis and ensures the diffraction-limited imaging of the telescope.

Citation Download Citation

Yongwei Guo, Shimo Yang, Xuedong Gu, and Shen Wang "Mechanical analysis and experiment study of a Φ1m paraboloidal mirror", Proc. SPIE 6148, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 61480K (30 May 2006); https://doi.org/10.1117/12.674095

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