Patent ID: 8015846
Filing Date: 2011-09-13
Classification: C03B,Y02P

Abstract:
1. An elongation method for producing an optical component of quartz glass, said method comprising: a) connecting an end face of a hollow cylinder of quartz glass having an inner bore and a tapered end portion to an attachment piece of quartz glass having a bore, such that the inner bore of the hollow cylinder and the bore of the attachment piece are at least temporarily interconnected fluidically so as to form a passage bore, b) passing a cleaning fluid through the inner bore of the hollow cylinder and through the passage bore, c) inserting a core rod of quartz glass that rests on a contact surface of the attachment piece into the inner bore of the hollow cylinder, and d) continuously supplying the hollow cylinder, starting with the tapered end portion, to a heating zone, heating the hollow cylinder therein zonewise so as to form a drawing bulb and continuously drawing the component therefrom; wherein the attachment piece has a maximum outer diameter that differs by not more than 10 mm from an outer diameter of the hollow cylinder of quartz glass at an end of the hollow cylinder of quartz glass facing the attachment piece, and wherein the end portion of the hollow cylinder of quartz glass engaging the attachment piece is a truncated inwardly-tapering cone.