It has the device and methodological null energy source in order to produce

摘要

PROBLEM TO BE SOLVED: To provide a device and a method, comprising an energy source and a substrate tube, for manufacturing an optical preform by means of an internal vapor deposition process.;SOLUTION: The substrate tube has a supply side for supplying glass-forming precursors to the interior of the substrate tube and a discharge side for discharging components which have not been deposited on the interior of the substrate tube, while the energy source is movable along the length of the substrate tube between a reversal point on the supply side and a reversal point on the discharge side.;COPYRIGHT: (C)2009,JPO&INPIT