Numerical and Experimental Analysis of Light-Weighted Primary Mirror for Cassegrain Telescope

Abstract:

This article reports an approach of light-weighted mirror design and analysis to increase the weight reduction ratio and improve optical performance based on the finite element method and opto-mechanical analysis. The approach is to represent mirror surface deformation derived from finite element analysis (FEA) by Zernike polynomials, such that the impact of deformation on optical system performance can be evaluated by the optical design and analysis program. The experimental modal analysis was also performed to validate the FEA results. The numerical result shows that the light-weighted primary mirror of Cassegrain telescope is obtained by this approach and predicted deformation fulfills the requirements of optical design.

• Periodical: Applied Mechanics and Materials (Volumes 52-54)
• Pages: 59-64
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.52-54.59
• Online since: March 2011
• Authors: Yu Chuan Lin, Long Jeng Lee, Shenq Tsong Chang, Yu Cheng Cheng, Ting Ming Huang
• Keywords: Light-Weighted Mirror, Numerical Modeling, Opto-Mechanical Analysis

References

[1] D. Vukobratovich, in: Optomechanical Design, edited by P. R. Yoder, SPIE Press, SD (1992).

[2] P. R. Yoder, in: Opto-Mechanical System Design, edited by B. J. Thompson, Marcel Dekker, Inc., NY (1993).

[3] D. Vukobratovich, in: Handbook of Optomechanical Engineering, edited by A. Ahmad, CRC Press NY (1997).

[4] K. B. Doyle, V. L. Genberg, and G. J. Michels, in: Integrated Optomechanical Analysis, edited by A. R. Weeks, SPIE Press, WA (2002).

[5] Y. Y. Han, Y. M. Zhang, J. C. Han, J. H. Zhang, W. Yao and Y. F Zhou: Trans. Nonferrous Met. Soc. China, Vol. 16 (2006), p.696.

[6] J. C. Han, Y. Y. Han, Y. M. Zhang , J. H. Zhang, W. Yao and Y. F Zhou: Trans. Nonferrous Met. Soc. China, Vol. 17 (2007), p.1160.

[7] Y. Y. Han, Y. M. Zhang, J. C. Han, J. H. Zhang, W. Yao and Y. F Zhou: Journal Wuhan University of Technology - Mater. Sci. Ed., (2008), p.259.

[8] Y. C. Lin, L. J. Lee, S.T. Chang, T. M. Huang and C. H. Hwang: Design and Simulation of Lightweight Mirror for Space Application, Proceedings of Design, Test, Integration and Packaging of MEMS/MOEMS, (2009), p.334.

[9] Y. C. Lin, L. J. Lee, S.T. Chang, T. M. Huang and C. H. Hwang: Integrated Optomechanical Analysis of Large Optical Mirror for Space-based Telescope System, Proceedings of International Conference on Manufacturing and Engineering System, (2009).