| 摘要 |
PROBLEM TO BE SOLVED: To provide a grinding method and its device by which the wear of a grindstone is reduced and its optical face of an optical member with high formational accuracy and a high quality surface roughness is obtained even if a curvature radius of the optical member varies in a different manner. SOLUTION: In the grinding method of the optical member 3 having a symmetrical configuration relative to a rotating axis, a grindstone 8 is relatively moved in a plane including a rotating axis of a work axis 1 to advance and retreat the optical member 3 while retaining the member during grinding work and an axis of a tool axis 4 retaining the grindstone 8 that forms a revolving work face 8a into a certain curvature radius R. Then the grindstone 8 is swiveled around a swiveling pivot B which is vertical relative to the plane, and the position of a work point P where the grindstone 8 comes into contact with the optical member 3 is arbitrarily set and grinding is carried out while moving the work point.
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