SPHERICAL LENS SURFACE PROCESSING METHOD USING CUP-SHAPED GRINDING STONE AND SPHERICAL LENS SURFACE PROCESSING APPARATUS

摘要

In a spherical lens surface processing method, a lens surface (5a) is ground to a spherical surface by forming a contact state in which a rotating cup-shaped grinding stone (9) is placed in contact with the lens surface (5a) and a sphere center oscillation state in which the cup-shaped grinding stone (9) oscillates along the lens surface (5a) centered on a sphere center. In the sphere center oscillation state, the distance from the center (P1) of the sphere center oscillation to the contact point (P3) of the cup-shaped grinding stone (9) with the lens surface (5a) is set to be the same as the radius (R) of the spherical surface. The oscillation width of the sphere center oscillation is set so that the contact point (P3) of the cup-shaped grinding store (9) with the lens surface (5a) can move from one peripheral edge of the lens surface (5a) past the lens center (P2) on the lens surface to the other peripheral edge.