光学精密工程2017，Vol.25Issue(10)：2599-2606,8.DOI:10.3788/OPE.20172510.2599
基于液压支撑的大口径主镜稳像技术
Position control technology of large aperture mirror based on hydraulic support
摘要
Abstract
The pitching rotation of a telescope will cause the relative displacement between a primary mirror and its cell ,and the displacement will influence on the stabilizing image of a telescope .To cor-rect the relative displacement of the primary mirror ,a method for stabilizing images of the primary mirror was proposed based on a hydraulic support to control the displacement between primary mirror and cell .A 1 .23 m SiC mirror in our lab was used to complete the online measuring experiment and a mirror position measuring system with 6 Line Variable Differential Transformer (LVDT ) was estab-lished .Under two cases with or without mage stabilizing technologies based on hydraulic support ,the displacement between mirror and cell was measured ,and the 5 freedom of mirror was computed by u-sing the measured data from sensors . Experimental results indicate that the proposed technology based on hydraulic support has excellent stabilizing image ability .Under the case without the image stabilization technology ,the mirror displacement of Z direction is about 150 μm and the angle around X axis is 2 .5″when the rotation angle of mirror is 40° .However ,the X displacement has reduced to 3 μm and the angle reduced to 0 .4″w hen this technology is conducted .It concludes that the stabilizing image technology based on hydraulic support can implement the determination and control of primary mirror position in real time .关键词
大口径望远镜/主镜/稳像技术/液压支撑Key words
large aperture telescope/primary mirror/image stabilization technology/hydraulic support分类
机械制造引用本文复制引用
李剑锋,吴小霞,李玉霞,孙敬伟,宿馨文..基于液压支撑的大口径主镜稳像技术[J].光学精密工程,2017,25(10):2599-2606,8.基金项目
中国科学院长春光学精密机械与物理研究所重大创新项目专项基金资助项目(No.Y3C122E130) （No.Y3C122E130）
