Method and apparatus for detecting irregular part of optical fib

Details Method and apparatus for detecting irregular part of optical fib Method and apparatus for detecting irregular part of optical fib

1994-02-08

1995-09-12

Hastings, Karen M.

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

With measuring, controlling, sensing, programming, timing,...

65381, 65382, 65484, 65486, 65491, 364473, 356 731, C03B 3707, C03B 37025

Patent

active

054493935

ABSTRACT:
A method and apparatus are provided for detecting irregular portions of an optical fiber which arise due to microscopic bubbles, bruises, and the like during an optical fiber drawing process. The present invention operates by varying the pulling rate of a pulling capstan based on feeding back measurements of the external diameter of the optical fiber to the pulling capstan. The ratio of a given pulling rate variation to a predetermined time period is then computed. The computed ratio is then compared to a previously specified value.

REFERENCES:
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patent: 4793840 (1988-12-01), Harding
patent: 4867775 (1989-09-01), Cain
patent: 5073179 (1991-12-01), Yoshimura
patent: 5079433 (1992-01-01), Smith
patent: 5172421 (1992-12-01), Nakamura
patent: 5185636 (1993-02-01), Button
patent: 5314517 (1994-05-01), Koening
Patent Abstracts of Japan, vol. 2, No. 33 (E-19) 6 Mar. 1978.
Patent Abstracts of Japan, vol. 2, No. 6 (E-4) 17 Jan. 1978.

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