MOLD DESIGNING METHOD, MOLD, AND MOLDED PIECE

摘要

A mold is prepared in which the use surfaces of the upper and lower molds are the design curved surfaces of an optical lens. The curved shape of the optical lens formed using this mold is measured. The measurement values are approximated to a formula (1) of aspherical surface, and the curved surface of the optical lens is specified as an aspherical surface. Comparing the curved surface of the optical lens specified by this aspherical surface formula with the design curved surface of the optical lens, the error between both curved surfaces are determined. Using the information corresponding to the error as correction information, the use surfaces of the upper and lower molds are corrected thereby to design an optical lens.