Patent ID: 7125315

Claim:
A method for determining a bevel curve in a high power minus lens, comprising the steps of: inputting a value of a curve of a convex face of the high power minus lens; and calculating a value of the bevel curve based on the inputted value of the curve of the convex face of the high power minus lens, wherein the value of the bevel curve is calculated as follows, when the value of the curve of the convex face is 2.0 or smaller, then K1=3.0; when the value of the curve of the convex face is 2.0˜4.0. then K1=(C−2.0)/2+3.0; when the value of the curve of the convex face is 4.0˜7.0. then K1=C; when the value of the curve of the convex face is 7.0 or greater, then K1=7.0, wherein K 1 represents the value of the bevel curve, and C is the value of the curve of the convex face of the high power minus lens.