Investigation of deformation experiment for active polishing lap

In optics polishing process, the active lap can reshape the profile for fitting the surface of large aspheric optical component with different local position and rotating angle in real time. In this way, the high order residual error by traditional polishing technique can be overcome. In this paper, the working process of active lap is modeled. The deforming capability of the active lap matching a parabolic mirror, diameter 1.3m and F/2, is simulated and verified by experiment. The results show the active 1ap can reshape the quadratic curved figure, both symmetrically and dissymmetrically with high precision. The residual errors of deflection are analyzed．