Apparatus for producing optical glass element

Details Apparatus for producing optical glass element Apparatus for producing optical glass element

1991-11-08

1992-06-09

Lindsay, Robert L.

Glass manufacturing

Preform reshaping means with treating means

65208, 65269, 65274, 65 84, 425407, 425408, 425435, 425808, C03B 1108

Patent

active

051203430

ABSTRACT:
An apparatus of producing an optical glass element of the present invention comprises the steps of displacing a gob of optical glass on a first heat working jig to a second heat working jig by making the gob of optical glass to adhere to the second heat working jig on the basis of the difference in wettability with high temperature glass between the first heat working jig and the second heat working jig, thermally deforming the gob of optical glass on the second heat working jig to form an optical glass preform, and forming the optical glass preform under heating and pressure by using pressing moulds to form an optical glass element.

REFERENCES:
patent: 2479935 (1949-08-01), Johnson
patent: 3278285 (1966-10-01), Pickering
patent: 3900328 (1975-08-01), Parsons et al.
patent: 4139677 (1979-02-01), Blair et al.
patent: 4168961 (1979-09-01), Blair
patent: 4756737 (1988-07-01), Yoshimura et al.
patent: 4778505 (1988-10-01), Hirota et al.
patent: 4915720 (1990-04-01), Hirota

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