METHOD FOR DETERMINING LENS SHAPE MACHINING PROPRIETY OF EYEGLASS LENS, PROGRAM FOR DETERMINING LENS SHAPE MACHINING PROPRIETY, DEVICE FOR DETERMINING LENS SHAPE MACHINING PROPRIETY, AND METHOD FOR MANUFACTURING EYEGLASS LENS

摘要

PROBLEM TO BE SOLVED: To provide a method for determining whether machining of a lens shape can be performed in accordance with given data of a lens peripheral edge shape.;SOLUTION: In the method for determining lens shape machining propriety of eyeglass lens, whether machining of the lens shape can be performed in accordance with the lens peripheral edge shape is determined based on the peripheral edge shape data of the lens showing the peripheral edge shape of the lens by a coordinate point group in a two-dimensional coordinate system. The method for determining the lens shape machining propriety includes an external contact point specifying step and a machining propriety determination step. In the external contact point specifying step, two coordinate contact points contacting an external contact point specifying line are specified as external contact points P1 and P2. In the machining propriety determination step, when there is at least one coordinate point Qn between the two external contact points P1 and P2 specified by the external contact point specifying step, the determination is made on whether the lens shape machining between the two external contact points P1 and P2 can be performed by using a machining tool having a predetermined tool radius R.;COPYRIGHT: (C)2009,JPO&INPIT