【摘要】 大口径望远镜主镜的面形精度是影响望远镜成像质量的关键因素之一。光电系统中主镜轴向支撑点位置,对面形精度起着非常重要的作用,主镜支撑点位置合理与否,在一定程度上影响着光学系统的成像质量。本文对大口径望远镜主镜的轴向支撑和径向支撑技术进行了详细地研究,利用有限元软件ANSYS建立了主镜的参数化模型,对不同口径主镜的轴向支撑点数目和位置进行了优化,从而给出了最佳支撑点的位置。优化分析结果表明了,主镜的面形精度满足系统的精度要求,并且轴向支撑对镜面的面形影响较大。更多还原

【Abstract】 The surface figure precision of the primary mirror in a large aperture telescope is a key factor influencing the imaging quality. In the opto-electronic system, the axis support point’s position of the primary mirror is important for the mirror surface figure error. Whether the axis supports points position is appropriate will affect image quality in some degree. We research the axis support and radius support techniques of a large-aperture telescope primary mirror in detail. With finite element method software ANSYS, the primary mirror parameter model is built. We introduce how to decide the number of the different aperture mirror axis support points. The position of the different aperture mirror axis support points is optimized and the best position of support point is provided. The optimized analysis results indicate that the mirror surface figure error is satisfied. The surface figure is mostly influenced by the axial support system.更多还原