Method of producing a glass optical element capable of suppressi

Details Method of producing a glass optical element capable of suppressi Method of producing a glass optical element capable of suppressi

1998-09-10

2000-11-28

Vincent, Sean

Glass manufacturing

Processes

Utilizing parting or lubricating layer

65170, C03B 4002

Patent

active

061519154

ABSTRACT:
A mold has a moling surface of a material containing silicon carbide and/or silicon nitride as a main component and a carbon thin film formed on the molding surface to prevent fusion sticking. A glass substance which has a sag point not higher than 565.degree. C. and a predetermined composition free from arsenic oxide is introduced into the mold. The glass substance is press-formed in a heated and softened condition into a glass optical element of high precision.

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