Patent ID: 7712335
Filing Date: 2010-05-11
Classification: C03B,Y02P,Y10T

Abstract:
1. A method for producing a quartz glass article, for producing an optical component, the method comprising the steps of: providing a quartz glass cylinder having an inner bore therein, mechanically treating the inner bore to a final dimension; and then applying an etching treatment to the inner bore, wherein the step of mechanically treating the inner bore comprises a plurality of removal processes each with a successively smaller removal depth such that, the inner bore has closed subsurface cracks therein, and all of the closed subsurface cracks in the inner bore have depths of not more than 2 mm after the last removal process, and wherein the inner bore is subsequently subjected to the etching treatment so as to produce an etching removal with a depth of not more than 50 μm, and such that the inner bore has an etched structure that has cracks therein, all of said cracks having a depth of not more than 2.0 mm and a width of not more than 100 μm.