APPARATUS FOR PRODUCING GLASS BLANK FOR OPTICAL GLASS ELEMENT

摘要

PURPOSE:To continuously produce a glass blank with a high surface accuracy over a long period of time by preventing a glass receiving member from deteriorating and reaction or melt sticking of a glass receiving member with glass from occurring. CONSTITUTION:A glass receiving member 13 for holding glass is installed in the interior of a hermetically closed container 2 equipped with a glass introduction port 7 capable of passing glass 12, melted and dropped from an orifice therethrough and a sealing means 17 capable of airtightly sealing the glass introduction port 7.