摘要
利用齐次坐标变换理论分析了计算机数控能动磨盘加工大口径离轴非球面反射镜时磨盘底面需要形成的实时面形,给出了通用的盘面实时轮廓的计算方法。以NST(新太阳望远镜)的离轴抛物面主镜参数为例,给出了用现有能动磨盘加工时盘面形状及磨盘变形量的计算结果,并将该方法用于两块轴对称非球面(Φ1030F/1.6椭球面和Φ1250F/1.5抛物面)反射镜的研磨中,加工结果表明该方法可以准确描述加工中磨盘的面形。理论分析、计算和实验结果为今后开展能动磨盘加工大口径离轴非球面反射镜奠定了基础。
The Computer Controlled Active Lap（CCAL）＇s real-time surface shape in fabricating large off-axis aspheric mirror is analyzed by using coordinates transform theory,and a universal method for calculating the lap＇s real-time profile is also presented.The physical parameters of off-axis aspheric mirror in New Solar Telescope（NST） is used to be simulated as an example,and the active lap＇s surface shape in grinding and polishing process is got.The application in two aspheric reflected mirrors（Φ1 030 F/1.6 ellipsoid and Φ1 250 F/1.5 paraboloid）＇ grinding shows that this method can be used to describe the lap＇s surface shape exactly in fabrication.The results from analysis and calculation can be used in next off-axis aspheric mirror fabricating.
出处
《光电工程》
CAS
CSCD
北大核心
2011年第9期77-83,共7页
Opto-Electronic Engineering
关键词
能动磨盘
离轴非球面加工
磨盘面形计算
坐标变换
active lap
off-axis aspheric mirror fabricating
lap surface profile calculation
coordinates transform
