Glass optical element press-molding die having a tantalum contai

Details Glass optical element press-molding die having a tantalum contai Glass optical element press-molding die having a tantalum contai

1994-01-07

1996-07-23

Ozaja, Donald E.

Glass manufacturing

Glassworking or preform by or with reheating means

Mechanical means to reshape preform

6537411, 6537412, 6537413, 425808, C03B 1108

Patent

active

055385281

ABSTRACT:
A die for press-molding a glass optical element which includes a base material having a surface to press-mold glass and a tantalum(Ta)-containing alloy thin layer on the surface, the base material being heat-resistant and strong enough to withstand press-molding.

REFERENCES:
patent: 4685948 (1987-08-01), Kuribayashi et al.
patent: 4721518 (1988-01-01), Monji et al.
patent: 5028251 (1991-07-01), Schinker et al.
patent: 5125949 (1992-06-01), Hirota et al.
patent: 5171348 (1992-12-01), Umetani et al.

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