The present invention relates to a method of manufacturing a solid preform by moving a heat source parallel to the longitudinal axis of a substrate tube, whose inner surface is coated with one or more doped or undoped glass layers, so as to collapse the substrate tube into the solid preform in a number of passes, with an etchant being supplied to the interior of the substrate tube after a number of passes of the heat source.
申请公布号
ZA200304379(B)
申请公布日期
2004.03.11
申请号
ZA20030004379
申请日期
2003.06.04
申请人
DRAKA FIBRE TECHNOLOGY B.V.
发明人
SWARTS, MARTINUS, JOHANNES, MARINUS, JOZEPH;SIMONS, DENNIS, ROBERT