Apparatus for producing optical glass element

An apparatus for producing an optical glass element comprising at least

• means for supplying molten glass to a first heat working jig;
• heating means for heating a second heat working jig having a desired forming surface while carrying it;
• holding means for holding said second heat working jig heated by said heating means in a state wherein said forming surface looks downward;
• press means for pressing said molten glass on said second heat working jig held by said holding means so as to make said molten glass to adhere to said forming surface;
• reversal means for reversing said second heat working jig, on which said molten glass is pressed, to a state wherein said formed surface looks upward;
• thermal deformation means for thermally deforming said molten glass while carrying said second heat working jig, on which said molted glass is pressed, along said heating means to form an optical glass preform;
• slow cooling means for slowly cooling said optical glass preform while carrying said second heat working jig, to which said optical glass preform is mounted, along said slow cooling means;
• and
• heat press forming means for forming said optical glass preform under heating and pressure by using pressing moulds to form an optical glass element.