Method for making stamper for press molding optical articles

摘要

An exemplary stamper includes molding portions arranged in an array. Each of the molding portions includes a central optical molding portion and an annular peripheral molding portion surrounding the central optical molding portion. Each molding portion is capable of facilitating formation of a respective optical article. A surface roughness of the annular peripheral molding portion is larger than a predetermined wavelength of light. The predetermined wavelength is selected according to a wavelength of light that is expected to be incident on the optical article when the optical article is in use.