Patent ID: 7175785

Claim:
Method of producing a polarized lens by using a split casting die arranged such that at least one of a plurality of mobile portions splitting a molding surface that forms a curvature of said lens, into which surface a polarized film is mounted, makes one of ascending and descending movement from the molding surface so as to generate a recess at the molding surface, which method comprises the steps of hot-pressing a polarized film, which is formed into a shape substantially corresponding to one of said plurality of mobile portions, into a curved shape adaptable into said curvature; descending said one of said plurality of mobile portions so as to generate said recess thereat; mounting said polarized film as shaped with said curvature into said recess and closing said casting die; injecting a fused lens molding resin into a cavity within said casting die from a gate with said lens molding resin filled in a runner engaged to said casting die; and taking out a prototype lens, in which said lens molding resin is integrally joined with said polarized film, when said molding resin is cured.