Patent ID: 9156196
Filing Date: 2015-10-13
Classification: B29C,B29D,B29L,G11B

Abstract:
1. A method of manufacturing optical elements to produce lenses by press-molding a molding material using a molding die containing a first die having a first molding surface and a second die having a second molding surface, the method comprising: producing a reference molding die based on a die design value in which a lens design value is determined and based on the lens design value, the die design value containing a shape of the first molding surface, a shape of the second molding surface, and an inter-die distance between the first molding surface and the second molding surface is determined; determining a specific aberration value of either of a low-order spherical aberration or a low-order astigmatism of a lens produced using the reference molding die, and when the specific aberration value exceeds a predetermined range, of a plurality of approximate aberration values of already produced correction molding dies, an approximate aberration value that is closest to a difference between the specific aberration value of the lens produced using the reference molding die and the lens design value is determined as an approximate aberration amount; determining a correction aberration amount to offset the approximate aberration amount to change the lens design value so as for the specific aberration to have the correction aberration amount and based on the thus-changed value, wherein based on the determined correction aberration amount the shape of either of the molding surfaces of the first die and the second die is changed so as to produce lenses using a correction molding die; and determining the specific aberration value of a lens produced using the correction molding die to determine whether the thus-determined specific aberration value falls within a predetermined range, wherein, when the thus-determined value falls within the predetermined range, another die design value is determined and then based on the another design value, lenses are produced.