Method of enlarging end of capillary tube bore

Details Method of enlarging end of capillary tube bore Method of enlarging end of capillary tube bore

1989-10-16

1992-10-06

Jones, W. Gary

Glass manufacturing

Processes

Forming product or preform from molten glass

65 31, 65108, 65109, 65DIG9, 156646, 156663, C03B 3710

Patent

active

051528169

ABSTRACT:
A method of forming a tapered aperture at the end of a capillary tube bore. A gaseous etchant such as a fluorine-containing compound flows through the bore and emanates from the first end of the tube. That tube end is heated to create a longitudinal temperature gradient. The gaseous etchant reacts with the tube and enlarges that portion of the bore at the first end. The resultant tapered aperture has a surface smoothness and shape that greatly facilitates the insertion of optical fibers during the fabrication of optical energy transfer devices.

REFERENCES:
patent: 4415404 (1983-11-01), Riegl

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