Abstract: In aspheric mirror polishing progress

the deformable polishing lap can change the lap surface to fit the surface of aspheric optical mirror. A novel method of designing deformable polishing lap is brought forward by using PZT actuator. It consists of an aluminum disk which can change surface profile continuously under the control of PZT actuators. When the deformable aspherical polishing lap moves on the surface of aspherical mirror

the needed deformation of each PZT actuator is calculated at any location. After each PZT actuator deforming

the surface profile of deformable aspherical polishing lap is changed to an off-axis surface of aspheric optical mirror at that location. Location error will lead the deformation error of each PZT actuator and surface profile error of lap. In this article

location error is analyzed and calculated. The result shows that the location error should be controlled in less than ±0.5mm.