Method for micro-grinding tip-accurately induced brittle fracture forming of curved mirror surface

摘要

The present invention provides a method for micro-grinding tip-accurately induced brittle fracture forming of a curved mirror surface. The method includes the steps of: grinding a surface of an optical glass material by means of a V-shaped tip of a diamond grinding wheel to form a V-shaped microgroove having a groove micro-tip; setting two supporting points with a distance of L therebetween on one side of the optical glass material where the microgroove is machined, providing a loading pressing head having a horizontal deviation distance of l between a loading point and the groove micro-tip on the other side of the optical glass material, and allowing the loading pressing head to perpendicularly apply a loading force F onto the optical glass material with a loading speed of v, and forming a penetrated smooth curved mirror surface within 0.3 millisecond via the loading point of the loading force F and under induction of the groove micro-tip.