Controllability of stiffness of bonnet tool polishing large aspheric lenses

The controllability of stiffness of bonnet tool polishing large aspheric lenses was studied, aiming to ensure the high stability and uniform removal rate of bonnet tool in polishing process. After analyzing the force situation of bonnet tool when polishing large aspheric lenses, the stiffness of the bonnet tool was calculated, and then influencing factors of stiffness of bonnet tool and the effects brought by stiffness of bonnet in polishing process were discussed. After that, control algorithm of bonnet tool was designed and simulated experiments were carried out, the results revealed that the controllability of stiffness of bonnet tool in polishing process could be achieved, which verified the correctness of the control algorithm.