Patent ID: 8235770

Claim:
An eyeglass lens processing apparatus comprising: a lens chuck shaft which holds and rotates an eyeglass lens; a lens edge position detection unit which detects edge positions of a front surface and a rear surface of the lens on the basis of target lens shape data; a processing tool which processes a peripheral edge of the lens and includes a roughing tool, a beveling tool, a bevel-modifying tool and a chamfering tool, the bevel-modifying tool including a grindstone or a cutter and configured to remove a part of at least one of a bevel shoulder and a periphery of a bevel slope on the rear surface side of the lens subjected to beveling; a selection unit which is used to select a processing mode including a high curve beveling mode for forming a bevel in the lens fitted into a high curve frame having a protrusion portion in which a side wall of the frame on the rear surface side of the lens is larger than a side wall of the frame on the front surface side of the lens; a modifying portion data input unit including a display for displaying a screen for inputting positional data of a portion of the lens to be modified in a cross sectional direction of the lens, the positional data including data of a modifying portion of the lens for removing the part of at least one of the periphery of the bevel slope and the bevel shoulder so as to prevent an interference between the bevel shoulder or the bevel slope on the rear surface side of the lens and the protrusion portion of the high curve frame; a calculation unit which obtains path data the bevel to be formed in the peripheral edge of the lens on the basis of the edge positions of the front surface and the rear surface of the lens obtained by the edge position detection unit, and obtains path data of the modifying portion for the bevel-modifying tool on the basis of the path data of the bevel and the data of the modifying portion, in the high curve beveling mode; and a processing control unit which performs the beveling to the peripheral edge of the lens by the beveling tool in accordance with the beveling data, and removes the modifying portion on the rear surface side of the lens by the bevel-modifying tool in accordance with the bevel-modifying data.