| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for practically and easily manufacturing a high-accuracy lens mold.SOLUTION: The method includes: a first step for preparing a primary mold MA to form a predetermined cavity; a second step for molding a primary prototype molded lens 1A by the primary mold MA, measuring at least one lens surface shape of the primary prototype molded lens 1A, and determining shrinkage factors m, mof the primary prototype molded lens 1A regarding x and y directions; a third step for calculating a release amount e(x, y) being a difference about a z direction between the at least one lens surface shape and a corresponding molding surface shape of the primary mold MA as e(x, y)=F(x, y)-f(m*x, m*y), and calculating a lens molding surface shape F'(x, y) of a secondary mold as F'(x, y)=f'(m*x, m*y)+e(x, y); and a fourth step for correcting the primary mold on the basis of the lens molding surface shape F'(x, y) of the secondary mold so as to form the secondary mold. |
