| 摘要 |
PROBLEM TO BE SOLVED: To provide a forming method of optical glass element that can produce an optical glass product with high surface accuracy. SOLUTION: An upper mold 1 and lower mold 2 for pressing/forming an optical glass raw material 8 are equipped with infrared lamp heaters 7a and 7b. In pressing/forming process, the optical glass raw material 8 is reheated by heating the exterior of the upper mold 1 and lower mold 2 by infrared lamp heaters 7a and 7b, which moderates temperature distribution of the optical glass raw material 8.
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