Patent ID: 6071176
Filing Date: 2000-06-06
Classification: B24B

Abstract:
For use in calibrating a lens cutting/grinding machine in which a lens is mounted on a first spindle for rotational and reciprocal motion about and on a Z-axis and a cutting/grinding tool is mounted on a second spindle for rotational motion about an axis disposed at an obtuse angle in relation to the Z-axis and for reciprocal motion along an X-axis, the alignment of the tool being adjustable along a Y-axis, a calibration gauge comprising:a disk of material cuttable/grindable by the tool;means on one face of said disk for chucking said disk to the first spindle for rotation about the Z-axis;means on said chucking means for maintaining said disc in one of two 180 degree orientations in relation to the X and Y axes; anda target on an opposite face of said disk, said target comprising bands delineated on said disk aligned on the X and Y axes and intersecting at a center of said disk on the Z-axis so as to define four quadrants on said opposite face of said disk.