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Finite element analysis of lightweight, active primary mirror
Lu, Wei Xin1,2,3; Guan, Chun Lin1,2; Rao, Chang Hui1,2; Lu, W.X.
Volume8415
Pages84150R
2012
Language英语
ISSN0277786X
DOI10.1117/12.971461
Indexed ByEi
Subtype会议论文
AbstractWith the increasing requirement on spatial resolution to achieve ideal performance in space-based optical imaging system, there is a need to enlarge primary apertures. However, primary mirrors of such systems cannot maintain its optical tolerances across the mirror surface after sending to space, because of gravity change and varying ambient temperature. It necessitates active optics technology of primary mirror surface correction. Since mass-to-orbit is expensive and limited, lightweight primary mirror is needed. The paper investigates a lightweight, active primary mirror. This primary mirror structure includes lightweight face sheet and substrate with surface-parallel actuators embedded in the recess of web support ribs. Finite element models of lightweight, active primary mirror structures with different structural parameters are established and simulated. Using the response function matrixes acquired from finite element analysis, the fitting errors for Zernike polynomials are computed by MATLAB. Correctability comparisons of lightweight, active primary mirror structures with different parameters are carried out. To get best correctability, the mirrors should have small recess depth, high and thin ribs, thick face sheets and long actuators. The structural analysis result will be valuable for the design of lightweight, active primary mirror. © 2012 SPIE.; With the increasing requirement on spatial resolution to achieve ideal performance in space-based optical imaging system, there is a need to enlarge primary apertures. However, primary mirrors of such systems cannot maintain its optical tolerances across the mirror surface after sending to space, because of gravity change and varying ambient temperature. It necessitates active optics technology of primary mirror surface correction. Since mass-to-orbit is expensive and limited, lightweight primary mirror is needed. The paper investigates a lightweight, active primary mirror. This primary mirror structure includes lightweight face sheet and substrate with surface-parallel actuators embedded in the recess of web support ribs. Finite element models of lightweight, active primary mirror structures with different structural parameters are established and simulated. Using the response function matrixes acquired from finite element analysis, the fitting errors for Zernike polynomials are computed by MATLAB. Correctability comparisons of lightweight, active primary mirror structures with different parameters are carried out. To get best correctability, the mirrors should have small recess depth, high and thin ribs, thick face sheets and long actuators. The structural analysis result will be valuable for the design of lightweight, active primary mirror. © 2012 SPIE.
Conference NameProceedings of SPIE: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Conference Date2012
Citation statistics
Document Type会议论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/7775
Collection自适应光学技术研究室(八室)
Corresponding AuthorLu, W.X.
Affiliation1. Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
2. Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China
3. Graduate School, Chinese Academy of Sciences, Beijing 100049, China
Recommended Citation
GB/T 7714
Lu, Wei Xin,Guan, Chun Lin,Rao, Chang Hui,et al. Finite element analysis of lightweight, active primary mirror[C],2012:84150R.
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