METHOD FOR DESIGNING MOLD FOR MOLDING LENS, AND MOLDED LENS

PROBLEM TO BE SOLVED: To provide a method for designing a mold for molding a lens, and the lens accurately having desired optical characteristics without being affected by the shrinkage of a material, the change quantity of a refractive index or the like being the indefinite elements of the lens. SOLUTION: A tentative mold 2 is formed on the basis of a predetermined shape design value and a tentative lens 1 is molded by the tentative mold, and the optical characteristics of the molded tentative lens are measured to be compared with desired optical characteristics to detect the shift quantity of the spherical aberration value thereof. The shift quantity of an aspheric aberration value shifted from the desired optical characteristics as a result of detection is collated with a table T preliminarily calculating the relation between the fine change quantity Ai of higher order among the aspheric surface constant Ai of a formula prescribing an aspheric surface and the variation quantity of the aspheric surface aberration value, and the fine change quantity of higher order among the corresponding aspheric surface constant is determined as adjusting quantity and the adjusting quantity is added to the aspheric surface constant of the formula for prescribing the aspheric surface of the tentative mold to design a final mold as a new shape design value.