Patent ID: 7713108

Claim:
An eyeglass lens processing apparatus for processing a peripheral edge of an eyeglass lens based on target lens shape data, the apparatus comprising: a lens rotating unit that rotates a lens chuck shaft for holding the lens; a grindstone rotating unit that rotates a grindstone rotating shaft to which a plurality of grindstones including a roughing grindstone is attached; a X-axis moving unit that relatively moves the lens chuck shaft in an axial direction of the lens shuck shaft with respect to the grindstone rotating shaft based on X-axis moving information; a Y-axis moving unit that relatively moves the lens chuck shaft in a direction in which an axis-to-axis distance between an axis of the lens chuck shaft and an axis of the grindstone rotating shaft varies based on Y-axis moving information; a lens curve data input unit that inputs curve data of at least one of a front refractive surface and a rear refractive surface of the lens, the curve data being generated by calculation based on a detected position of the refractive surface of the lens or input as known data by an operator in advance; and a computing unit obtains the X-axis moving information corresponding to the Y-axis moving information for each rotation angle of the lens chuck shaft so that a contact surface of the lens with the roughing grindstone is located within a width of the roughing grindstone from the beginning of the roughing until the end of the roughing based on the target lens shape data, layout data, and the curve data.