Method and device for manufacturing an optical preform by means of an internal vapour deposition process, and a corresponding substrate tube assembly
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United States of America Patent
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Nov 28, 2017
Grant Date -
Dec 29, 2016
app pub date -
Sep 6, 2016
filing date -
May 22, 2014
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Abstract
A device for manufacturing an optical preform by means of an internal vapour deposition process including an energy source, a hollow substrate tube having a supply side and a discharge side and the energy source being moveable along a length of the hollow substrate tube, and an elongation tube connected to the hollow substrate tube at the discharge side thereof, wherein the hollow substrate tube extends into an interior of the elongation tube and an internal diameter of the elongation tube is at least 0.5 millimeters larger than an external diameter of the hollow substrate tube.
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