唐境, 张景旭, 安其昌, 李洪文. 大口径巡天望远镜校正镜弹性体支撑[J]. 红外与激光工程, 2020, 49(S1): 20200124. DOI: 10.3788/IRLA20200124
引用本文: 唐境, 张景旭, 安其昌, 李洪文. 大口径巡天望远镜校正镜弹性体支撑[J]. 红外与激光工程, 2020, 49(S1): 20200124. DOI: 10.3788/IRLA20200124
Tang Jing, Zhang Jingxu, An Qichang, Li Hongwen. Elastomer support for large survey telescope corrector[J]. Infrared and Laser Engineering, 2020, 49(S1): 20200124. DOI: 10.3788/IRLA20200124
Citation: Tang Jing, Zhang Jingxu, An Qichang, Li Hongwen. Elastomer support for large survey telescope corrector[J]. Infrared and Laser Engineering, 2020, 49(S1): 20200124. DOI: 10.3788/IRLA20200124

大口径巡天望远镜校正镜弹性体支撑

Elastomer support for large survey telescope corrector

  • 摘要: 为了探究宇宙起源与演化过程,大口径巡天望远镜将突破已有的探测深度和广度,帮助人类解决更多科学前沿领域问题。大口径校正镜组不同于普通的透射式光学系统,为了使校正镜组性能满足设计要求,总结分析了透镜支撑设计的基本原理和一般方法,建立了弹性体有限元模型,进行了参数化分析并优化了支撑结构关键部位。着重考虑透镜和镜室在不同重力载荷下的位移变形、应力变化和成像质量要求。结果显示,在0°~90°俯仰角变化范围内,弹性体支撑的透镜标准化点源敏感性值最小值为0.973 1,其面形误差、应力和位移等方面均满足系统设计要求,以上的工作对于类似的大口径系统设计与优化有着一定指导意义。

     

    Abstract: In order to explore the origin and evolution of the universe, the large survey telescope will break through the existing detection depth and observation area to help humans solve more scientific frontiers unresolved issues. The meter-level corrector is different from ordinary transmission optical systems. To make the performance of the corrector meet the design requirements, the basic principles and general methods of lens support design were summarized and analyzed, a finite element model of elastomer support was established, and the analysis of key parts in the support structure was optimized. At the same time, the displacement and deformation, stress changes and imaging quality changes of the lens and the cell under different gravity loads were considered. The results show that when the elevation angle changes from 0° to 90°, the normalized point source sensitivity (PSSn) value of the elastomer support at least 0.973 1, and its surface shape error, stress and displacement also meet the system design requirements. The work has guiding significance for the design and optimization of similar large aperture systems.

     

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