Lens spherical surface processing method and lens spherical surface processing apparatus using cup-shaped grindstone

摘要

In the lens spherical surface processing method, a contact state in which a rotating cup-shaped grindstone (9) is brought into contact with the lens surface (5a), and a cup-shaped grindstone (9) is a ball core along the lens surface (5a) A swinging ball core swinging state is formed, and the lens surface (5a) is ground to a spherical surface. In the ball core rocking state, the distance from the rocking center (P1) of the ball core rocking to the contact point (P3) with the lens surface (5a) in the cup-shaped grindstone (9) is the radius of the spherical surface (R) Set the same as. The contact point (P3) of the cup-shaped grindstone (9) with the lens surface (5a) in the cup-shaped whetstone (9) exceeds the lens center (P2) on the lens surface and one of the lens surfaces (5a) It is set so that it can move from the outer peripheral side to the other outer peripheral side.