Notch shaping method, metallic mold for lens shaping, lens, and method of producing a lens

摘要

The present invention provides a method of shaping notches for use in lens manufacturing including providing a material to be milled to form a curved surface having many concentric notches utilizing a bite. The flat type bite has rakes with a curvature radius of at most 0.1 mum at both ends of the flat cutting edge. The relative rotation of the bite and the material allows the flat type bite to mill the material in a desired shape as the cutting edge of the flat type bite is pressed against the material. The lens is milled by the flat portion along the cutting edge of the flat type bite in such a manner that the curved surface maintains an approximately linear shape and the notches are milled by the rakes on the cutting edge of the flat type bite. The present invention also provides a metallic mold for molding lens using the method of shaping notches, a method of manufacturing a lens and a lens having a surface with a curvature that has many concentric notches.