Patent ID: 6942542

Claim:
An eyeglass lens processing apparatus for processing a periphery of an eyeglass lens, comprising: a lens rotation shaft which holds and rotates the lens, the lens rotation shaft being rotatable about a first axis; a first grinding shaft having a rough grinding stone and a finish grinding stone for flat processing, the first grinding shaft being parallel to the lens rotation shaft; a second grinding shaft having a grooving grinding stone which forms a groove in a peripheral edge surface of the lens; a holder which rotatably holds the second grinding shaft; first moving means for relatively changing a position of the lens in a direction of the first axis with respect to the grooving grinding stone; second moving means for relatively changing a position of the lens in a direction of a second axis perpendicular to the first axis with respect to the grooving grinding stone; inclination means for relatively changing an inclination angle of the second grinding shaft with respect to the lens rotation shaft to relatively change an inclination angle of a rotation axis of the second grinding shaft with respect to the first axis of the lens rotation shaft; and calculation and control means for obtaining grooving locus data based on target lens shape data, obtaining inclination angle data at each processing point based on the obtained grooving locus data, and controlling the first and second moving means and the inclination means based on the obtained grooving locus data and inclination angle data.