Magnetorheological Suspension-Based High Precision Finishing Technology (MRF)

In MRF the mechanical energy for material removal is generated by the hydrodynamic flow of a magnetorheological (MR) polishing suspension throughout a preset converging gap formed by the workpiece surface and a moving rigid wall. MRF reduces the surface microroughness of optical materials to < 10 A. Shape errors are corrected to a fraction of a wavelength of light and subsurface damage is removed.