SHAPING MOLD FOR GLASS MOLDING, MANUFACTURING METHOD FOR OPTICAL ELEMENT, AND OPTICAL ELEMENT

摘要

Provided is a shaping mold for glass molding that can reduce the occurrence of burrs, improve the offset accuracy of the mold, and improve the accuracy of the shape of a lens. An outer edge portion (41) of a level difference gap (40) is spaced apart from an inner edge portion (42) and is recessed more than the inner edge portion (42) and therefore the infiltration of a molten glass material into the gap (GA) between a core part (22) and a mold outer shape part (32) can be prevented by adjusting the gap width between the core part (22) of the level difference gap (40) and the mold outer shape part (32). In such case, a level difference exists between the core part (22) and the mold outer shape part (32) and thus it becomes more difficult for the molten glass material to infiltrate into the gap (GA). Also, by providing the level difference gap (40), it is possible to prevent the edge side of the core part (22) from being deformed due to the pressure that results from the engagement of the mold outer shape part (32) and the core part (22), and the accuracy of the shape of the glass lens having an optical function surface transferred from an optical transfer surface (12a) can be improved.