Electro-optic fiber monitor

Glass manufacturing – Processes – Forming product or preform from molten glass

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65 101, 65 29, 65160, 242 18G, 242 42, 356 731, C03B 37025

Patent

active

043199011

ABSTRACT:
A method of and apparatus for monitoring the method comprising the steps of: generating electromagnetic radiation; using a first lens to form the electromagnetic radiation into a beam; directing the beam through a sampling volume for impingement upon the fibers; positioning a second lens in the same horizontal plane as the first lens such that the angle, whose tangent is D/d, is greater than or equal to five degrees, where D is the diameter of the second lens and d is the distance from a plane through the center of the second lens to the center of the sampling volume; collecting electromagnetic radiation backscattered from the fibers by means of the second lens; and generating a signal responsive to the amount of radiation collected as an indication of the average diameter of the fibers.

REFERENCES:
patent: 3471278 (1969-10-01), Greim
patent: 3879128 (1975-04-01), Presby
patent: 4012661 (1978-07-01), Dudderar et al.
patent: 4028827 (1981-07-01), Murphy et al.
patent: 4046536 (1977-09-01), Smithgall
patent: 4145201 (1979-03-01), Phillips
patent: 4146376 (1979-03-01), Beckman et al.

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