Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – With measuring – controlling – sensing – programming – timing,...
Patent
1996-01-31
1998-07-07
Hoffmann, John
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
With measuring, controlling, sensing, programming, timing,...
65404, 65388, 65389, 651342, 651349, 65325, C03B 37025
Patent
active
057762228
ABSTRACT:
A method of fabricating optical preforms that yield optical fibers having minimal scattering centers by substantially eliminating bubbles and crystallites that form during preform fabrication. The method utilizes glasses having low viscosity in their liquid state to eliminate large bubbles that contain ambient gasses. Small bubbles that have sizes comparable to the wavelength of light are eliminated by simultaneously vacuum-pumping and slow-cooling the liquid glass used to fabricate the preform before pouring the glass into the preform cast mold. Finally, bubbles due to the formation of vacuums in the preform are eliminated by applying a temperature gradient across the cast mold to induce a steep vertical gradient in viscosity in the liquid glass when the liquid glass is poured in the mold.
REFERENCES:
patent: H1259 (1993-12-01), Aggarwal
patent: 4828593 (1989-05-01), Morishita
patent: 5045507 (1991-09-01), Tran
patent: 5055120 (1991-10-01), Tran
patent: 5160521 (1992-11-01), Tran
patent: 5401289 (1995-03-01), France
Narken et al, Vacuum Preparation of High Purity Glass, Nov. 1963, IBM Technical Disclosure Bulletin vol. 6, No. 6 pp. 44-45.
Kopylov Nonna
Kortan Ahmet R.
Hoffmann John
Lucent Technologies - Inc.
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