Patent ID: 6787070
Filing Date: 2004-09-07
Classification: B29C,B29D,Y10S

Abstract:
A method for molding an optical lens, comprising the steps of:a. providing a mold having two molding shells disposed on edge and substantially vertically oriented, and an annular closure member having an outer surface disposed at the periphery of the molding shells cooperating with the two molding shells to define a molding cavity having a center, a vertical axis and a horizontal axis perpendicular thereto, both axes passing through the center to thereby divide the mold into an upper portion and a lower portion, a venting opening and a casting port disposed at the upper portion of the mold and spaced apart from each other at an acute angle, wherein the venting opening is in fluid communication with the ambient air and the molding cavity, and the casting port is separated from the ambient air by the outer surface of the closure member and in fluid communication with the molding cavity; b. introducing a fluid lens-forming material into the molding cavity through the casting port; c. curing the fluid lens-forming material so that the fluid lens-forming material is hardened to form the optical lens; and d. removing the optical lens from the molding cavity.