【摘要】 提出了使用三坐标测量机(CMM)对离轴非球面镜进行测量的方法。通过CMM对离轴非球面镜镜面进行自动测量,获得实际面形的三维坐标数据,并与理论离轴非球面镜模型进行分析比较,得到实际镜面的面形误差值和均方根值;依据CMM的测量结果,完成了对离轴非球面镜精磨阶段的加工,解决了目前离轴非球面镜精磨阶段难于检测,以至于无法加工的问题。随着离轴非球面镜顺利进入抛光阶段,使用CMM实现了离轴非球面镜精磨检测与抛光检测的无缝对接。更多还原

【Abstract】 A method was proposed to measure off-axis aspherical mirrors by a coordinate measurement machine(CMM).The 3D coordinates of the actual points on the off-axis mirrors were obtained with this method,and were compared with the data by the theoretical model,through which the profile errors and root-mean-square values of the actual mirrors were obtained.All the fine grinding processes were guided according to the measurement results.Thus the problem that off-axis mirrors are difficult to measure and manufacture is resolved.As the off-axis mirror came into the polishing process successfully,the measurement of off-axis aspherical mirrors in the grinding process was successfully followed by that in the polishing process.更多还原