| 摘要 |
Disclosed are a process for producing a glass shaped material having high quality and high mass accuracy and a process for producing an optical element, which includes the preparation of a glass shaped material having high quality and high mass accuracy, the heating of said glass shaped material and the precision-press-molding thereof. The present invention provides a process for producing a glass shaped material including the separation of a predetermined amount of a molten glass gob from the forward end of a molten glass flow flowing down from a flow pipe, by a specific means and the shaping thereof into the glass shaped material, a process for producing a glass shaped material including the dropping of a molten glass drop from a flow pipe, the receipt thereof with a shaping mold that ejects a gas, by a specific means, and the shaping thereof into the glass shaped material while it is caused to float, and a process for producing an optical element including the precision press-molding of a preform obtained by one of these processes.
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