| 摘要 |
PROBLEM TO BE SOLVED: To realize a metal mold for forming optical lens capable of stably producing optical leans with a high accuracy and to produce an optical lens without requiring polishing at a low cost. SOLUTION: In the metal mold, a top force 2A and a bottom force 1A brought into contact with a top and bottom end faces of a body mold 3 and having a flange part is prepared. A first optical effective face molding part 1a, an outer periphery regulation molding part 1b, an outer periphery play molding part 1c and an annular protruding part 1d for regulating the thickness are coaxially formed in a molding part of the bottom force 1A. A spherical optical lens material 4 is placed on the molding part of the bottom force 1A, the top forces 2A is inserted from the upper side of the body mold 3, the metal mold blocks are charged into a pressure molding machine, and through a preheating, a pressing and a cooling steps, the optical lens 5 to a prescribed shape is obtained. Thereby, the tilt of the top and bottom forces 2A and 1A can further be reduced to produce the optical lens 5 good in optical performances.
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