Patent ID: 9694466
Date: 2017-07-04
CPC Classifications: B24B

Claim:
1. A lens processing apparatus comprising: an optical member holding unit configured to hold an optical member as a processing target, the optical member holding unit being rotatable around a first rotation axis; a first driving unit configured to rotate the optical member holding unit; a ring-shaped grinding tool having an annular planar grinding surface that is an end face of the grinding tool, and having an outer periphery grinding surface that is an outer periphery of the grinding tool; a grinding tool holding unit configured to coaxially hold the grinding tool, the grinding tool holding unit being rotatable around a second rotation axis orthogonal to the first rotation axis; a second driving unit configured to rotate the grinding tool holding unit; a moving unit configured to move at least one of the optical member and the grinding tool relative to the other; and a control unit configured to control relative movement between the optical member and the grinding tool by the moving unit and rotation of the optical member and the grinding tool by the first and second driving units, wherein the control unit is configured to cause at least one of the optical member and the grinding tool to move relative to the other along the first rotation axis and to cause the outer periphery grinding surface to grind the optical member along the first rotation axis, thereby forming a planar D-cut surface, and to cause the planar grinding surface to further planarize the D-cut surface while rotating only the grinding tool.