Patent ID: 7415842
Filing Date: 2008-08-26
Classification: C03B

Abstract:
1. A manufacturing method for an optical glass element having an optical face and an edge face that is a circumferential portion of the optical face, comprising dropping a molten glass material on a lower mold which has a molding face used for transferring the optical face and a circumferential face that is adapted for transferring the edge face, and pressing the molten glass material between the lower mold and an upper mold so that the molten glass material comes in contact with at least a portion of the circumferential face, wherein pressing the molten glass material comprises maintaining a space between the molten glass material and a border area of the molding face and the circumferential face, wherein the border area of the molding face and the circumferential face includes an outer edge area of the molding face and an inner edge area of the circumferential face.