Method and apparatus for manufacturing a glass preform for optical fibres

摘要

An apparatus (200) for manufacturing a glass preform (150), which is a preform of an optical fiber, includes a driving unit (30) that drives a glass rod (5) around an axis of the glass rod (5); a burner (2) for accumulating glass soot around outside surface of the glass rod (5), which is driven by the driving unit (30), to form the glass preform (150), characterized in that the apparatus further includes a weight-deducting unit (20), on which the driving unit (30) is mounted, for deducting a predetermined weight from a total weight of the driving unit (30) and the glass preform (150) formed by the burner (2); and a measuring unit (27) provided under the weight-deducting unit (20) for measuring the total weight, from which the predetermined weight is deducted by the weight-deducting unit (20). A method of manufacturing a glass preform for an optical fiber by the OVD method comprising the corresponding steps to those of the means of the apparatus is also claimed.