The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 2016
Filed:
Aug. 08, 2013
Heraeus Quarzglas Gmbh & Co. KG, Hanau, DE;
Gerhard Schoetz, Aschaffenburg, DE;
Karsten Bräuer, Bruchköbel, DE;
Richard Schmidt, Hammersbach, DE;
Peter Bauer, Seligenstadt, DE;
Andreas Schultheis, Langenselbold, DE;
Paul Bödiger, Rodenbach, DE;
Andreas Langner, Freigericht, DE;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
The invention relates to a plasma deposition process for producing an optical preform, which is characterized by a cladding glass layer having a non-round internal cross-section together with high fluorine doping and axially and radially specified dopant distribution, which in the simplest case is as uniform as possible. For this purpose, a two-stage method is proposed, wherein a substrate body having a non-round cross-section is first reshaped into a coated substrate body having a circular cross-section in that a POD filling layer made of quartz glass having the nominal fluorine concentration is deposited onto a present filling surface and rounded by grinding, and then in the second stage of the method a POD sheathing glass layer made of fluorine-doped quartz glass and having a circular-ring-shaped cross-section is deposited.