Optimization of removal function for magnetorheological jet polishing - art. no. 67221Y

The removal function is the fundamental function for the computer controlled optical surfacing (CCOS) process. The removal function of magnetorheological jet polishing is investigated to obtain an optimum one by the method of CCOS. The initial annular footprint is revolved around an eccentric axis resulting in a time-averaged footprint with the largest removal at the center, monotonically decrease to zero at the edge. Similarly if the rotational footprint is traversed in a straight line, the convolved shape of stripe shows a Gaussian-like character. We also calculate the cycloid pattern from parallel scanning by rotational footprint and predict the residual errors on the surface. Calculation results show that the eccentric rotation motion of the jet can lead to improvements in footprint shapes and removal profiles.