Patent attributes
In a method for manufacturing a lens mold, a raw mold is provided. The raw mold defines a cavity therein. The cavity defines a raw molding surface. The raw molding surface includes a molding surface portion. The molding surface portion includes a center. Photoresist material is filled in the cavity, covering the molding surface portion. A photo mask is provided. The photo mask defines a through hole. The size through hole is the same as the molding surface portion of the lens mold. The photo mask is placed above the photoresist material with the through hole aligned with the center. The photoresist material is exposed and developed to form a photoresist portion. A rigid molding material is filled in the cavity. The resist portion is removed to expose the molding surface.
