Organic polymer lens mold

摘要

A mold for an organic polymer, ophthalmic lens element has separate upper and lower mold members with each mold member being composed of a thermoplastic polymer. The lower mold member has a central, bowl-shaped cavity with contours that conform to those of a lens to be molded therein, and has an annular rim surrounding the upper edge of the cavity. The upper member has a central portion with an under surface that corresponds in contour to that of the upper surface of the lens to be molded, and has an annular rim that surrounds the central portion and rests on the annular rim of the lower member when the two members are assembled.