| 摘要 |
<P>PROBLEM TO BE SOLVED: To efficiently produce a concave lens, such as a concave meniscus lens, a plano-concave lens or a biconcave lens in high precision, which are supposed that molding conditions are very narrow and press-molding is difficult. Ž<P>SOLUTION: In a mold 1 for mold pressing, a molding workpiece 2 arranged between molding faces 11, 21 is pressed by an upper die 10 and a lower die 20 in which the molding faces 11, 12 opposing to each other are formed, and the shape of each molding face is transferred to the molding workpiece 2, thereby an optical element in which the central part is the thinnest part inside the optical effective diameter is molded. In the mold 1, maximum load parts 11a, 21a for applying the maximum load to the molding workpiece 2 are respectively provided on the outside of the optical effective diameter in each molding face 11, 21. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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