Control software development for magnetorheological finishing of large aperture optical elements

Based on the mechanism of magnetorheological finishing, the dwell time function was solved by Jansson-Van Cittert algorithm to accomplish the kernel module design. Then the software modularization programming, modular testing and integration testing were conducted. A verification experiment was carried out on a crystal element with full aperture of 500 mm and the element’s surface achieved rapid and efficient convergence after the software controlled magnetorheological finishing. It is proved that the software could control the whole polishing process accurately.