CUTTING METHOD, CUTTING DEVICE, TOOL HOLDING DEVICE, OPTICAL ELEMENT, AND MOLDING DIE FOR OPTICAL ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide a cutting device capable of providing good surface roughness in a short time. SOLUTION: This cutting device comprises exciting parts 5a and 5b for vibrating a cutting tool 2 and a work piece 1 relatively in the main component force direction and the rear component force direction, and a driving device 9 for moving the cutting tool 2 so that an axis in the rear component force direction of ellipse, a trajectory of vibration of the tip of the cutting device, directs in the normal direction of a curved machined surface of the workpiece 1.