Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1974-02-15
1976-06-15
Bashore, S. Leon
Glass manufacturing
Processes
Forming product or preform from molten glass
65 30R, 65 32, 65DIG7, C03C 2502, C03C 1500
Patent
active
039634680
ABSTRACT:
A light guide is produced by the out-diffusion of boron oxide through a free surface of a uniform borosilicate mass. The resulting structure consists of increased index silica rich regions near the surface in contact with lower index regions of a composition approaching that of the unmodified borosilicate. The out-diffusion process, generally carried out at a temperature approaching the softening point of the glass, may be applied to a borosilicate tube to result in a fiber preform. Fibers drawn from such a preform may be characterized by a silica core region, a borosilicate clad region, and a silica outer shell. Use of the procedure results in a graded index structure.
REFERENCES:
patent: 3650598 (1972-03-01), Kitano et al.
patent: 3778132 (1973-12-01), Pinnow et al.
patent: 3817731 (1974-06-01), Yoshiyagawa
patent: 3843228 (1974-10-01), Yoshiyagawa et al.
Jaeger Raymond Edward
MacChesney John Burnette
Pinnow Douglas Arthur
Van Uitert LeGrand Gerard
Bashore S. Leon
Bell Telephone Laboratories Incorporated
Indig G. S.
Miga Frank W.
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