Fig. 9From: Rigid aspheric smoothing tool for mid-spatial frequency errors on aspheric or freeform optical surfaces(left) Pitch contact surface machined to designed aspheric surface with single point cutter. (middle) A section of the part’s surface with MSFs imprinted by spherical smoothing tool. (right) A section of the surface where MSFs has been removed by using aspheric smoothing tool with optimised tilt angleBack to article page