Method of producing the optical element

Details Method of producing the optical element Method of producing the optical element

1992-04-09

1993-04-13

Lindsay, Robert L.

Glass manufacturing

Processes

Sequentially forming, reheating, and working

65 321, 65 77, 65 83, 65111, C03B 1100

Patent

active

052019276

ABSTRACT:
A machine is provided for molding an optical element by using a molding block having upper and lower molding dies, a sleeve die and a glass blank combined integrally with each other. The machine includes a chamber which accommodates a heating zone having a plurality of sections for heating the molding block from above and below, a deformation zone for pressing the molding dies and a cooling zone having a plurality of sections for cooling the molding block. The chamber is formed with an inlet and an outlet for the molding block. The sections of the heating zone, the deformation zone and the sections of the cooling zone are provided independently of one another. A transport member is provided for sequentially transporting the molding block through the heating zone, the deformation zone and the cooling zone, and first and second shutters are provided for opening gas supply member is provided for introducing nonoxidizing gas into the chamber.

REFERENCES:
patent: 4836838 (1989-06-01), Hirota et al.
patent: 4874417 (1989-10-01), Winterburn
patent: 4913718 (1990-04-01), Yoshimura et al.
patent: 4915720 (1990-04-01), Hirota et al.
patent: 5087279 (1992-02-01), Monji et al.
patent: 5096479 (1992-03-01), Allen et al.

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