| 摘要 |
PURPOSE:To shorten cycle time and realize continuous and easy mold release without incurring much cost and deteriorating working accuracy by a method wherein resin is hardened under the condition that the outer peripheral part outside the optical effective diameter of the resin is brought into contact with elastic member made of shape memory alloy and, after that, the resin is separated from a mold by deforming the elastic member. CONSTITUTION:The mold releasing method of a composite type optical element concerned is performed by placing energy-curing resin 3 on the surface of a glass lens base material 1 so as to harden the resin 3 by being irradiated with energy under the condition that a molding surface 2b having the reversed shape of the desired shape is fixed by pressure onto the resin in order to separate the hardened resin 3 from a mold 2. Concretely, elastic member 3a made of shape memory alloy is provided at the outer peripheral part outside the optical effective diameter of the molding surface 2b so as to harden the resin 3 under the condition that the elastic member 2a is brought into contact with the outer peripheral part outside the optical effective diameter of the resin 3 in order to finally separate the resin 3 from the mold 2 by deforming the elastic member 2a. |
