用主动抛光盘磨制非球面是一个动态的过程,必须保证在计算机控制下,主轴的移动、旋转,和抛光盘的旋转、倾斜、变形及升降,以及主镜的旋转都步调一致。推导出在模式中诸要点的位置、速度、加速度和时间的关系,并根据所加工的口径??910 mm,焦比为F/2的抛物面主镜参量和所用主动抛光盘的参量分析

Using active lap to polish an aspherical mirror is a dynamic proceeding, so the translation and spin of spindle, the spin, tilt, deformation, and rise and fall of the lap; and the spin of the primary mirror all together must be kept in step, under the computer control. According to author's ??910 mm, F/2, parabolic primary mirror and our active lap parameters, the author analyzes the deformation character of active lap base, that is, its deforming quantity, deforming velocity and deforming acceleration, and the difference between precision deformation and approximative analysis; the distance of rising and falling on 3-hoist points of the stressed lap back, that is, its moving velocity and acceleration; the relationship between reality deforming quantity of stressed lap and the measuring quantity using LVDT on measuring shelf. Also the relationship and features about deformation and hoisting movement with V1 (lap moving velocity along the crossbeam) and V2 (lap spinning speed around its spindle) are analyzed. Based those analyses, the author can guide to design mechanics and electronics of active lap, and guarantee all these movement keep in step.