| 摘要 |
PURPOSE:To mold a desired complex aspherical lens readily, by attaching die pieces which form a cavity in a mold so as to form an aspherical face by deformaion due to an injection pressure. CONSTITUTION:A cavity 14 is formed by providing die pieces 4, 6 in a mold 1. A synthetic resin 17 is injected from a runner 15. Pieces 4, 6 are respectively deformed according to the shapes of their aspherical component faces 10, 13 by an injection pressure at this time and an aspherical shape which approximates to A face 19 and B face 20 of a lens 18 after molding is formed. |
