大口径平背形主镜支撑方式的选择  

Study on support way of large-aperture mirror with flat rear surface

作　　者：冯树龙[1] 张新[1] 翁志成[1] 丛小杰[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130022

出　　处：《光学技术》2004年第6期679-681,共3页Optical Technique

摘　　要：支撑方式对主镜面形的变化有十分重要的影响。为了使主镜的安装支撑既能保证面形变化最小,又能保证在不同仰角时位置不变动,需要对主镜的支撑方式进行分析和选择。通过对一个口径为600mm、中心孔径为200mm、光学表面曲率半径为2130mm的实体镜在各种支撑情况下的变形大小进行分析,并综合考虑加工、一阶共振频率及工作时的旋转因素后,最终确定了一种满足设计要求的优选支撑方案。It has a great influence for the support on mirror figure. In order to make the support of a primary mirror not to affect the surface figure and to fix the location of mirror when it rotating, an analysis of supports to minimize the displacements of the mirror is presented. A 600mm diameter finite element model blank with a 200mm diameter central hole and a 2130mm optical surface radius of curvature is studied for minimum surface error and high fundamental frequency. In addition to thinking about manufacture and rotation when working, a better support is decided.

关 键 词：主镜 支撑 有限元分析 

分 类 号：TH707[机械工程—仪器科学与技术]