基于主动光学的大口径反射镜硬点定位技术

大口径望远镜主镜、副镜等反射镜相对于其镜室的位置和方向靠硬点来保证,它是主动光学系统的关键组成部分,对提高望远镜的成像质量和安全防护性能具有重要的作用。本文全面地概述了大口径反射镜不同类型硬点定位的结构及工作原理,并详细介绍了E-ELT、VLT、VISTA、LSST望远镜中的硬点定位技术,它们是不同类型硬点定位的典型代表。最后,总结了大口径反射镜硬点定位的发展趋势,指出六杆硬点定位最有应用前景,并深入地论述了其结构特点及关键技术,提出了一系列提高其定位精度、轴向刚度及安全可靠性的方法。

Hardpoint location technique of large mirror based on active optics

Hardpoints determine the position and orientation of the mirrors relative to their mirror cells,and it is key elements of the active optics system and plays a significant role in improving the imaging quality and safety performance of the telescopes.The principles and structures of various kinds of hardpoints are comprehensively summarized,and hardpoint location techniques are introduced in E-ELT,VLT,VISTA and LSST,and they represent a variety of hardpoint location.Finally,the development tendency of the hardpoint location is summarized,and the key structures and technologies of hardpoint location are discussed in detail.Comparing with other types of hardpoint locations,hardpoint location with a hexapod configuration has a wide application prospect.At the same time,a series of solutions to improve the positioning accuracy,axial stiffness and safe reliability are given.