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:
Jan. 22, 2019
Filed:
Jan. 17, 2013
Heraeus Quarzglas Gmbh & CO KG, Hanau, DE;
Gerhard Schötz, Aschaffenburg, DE;
Karsten Bräuer, Bruchköbel, DE;
Richard Schmidt, Hammersbach, DE;
Peter Bauer, Seligenstadt, DE;
Andreas Schultheis, Langenselbold, DE;
Clemens Schmitt, Blankenbach, DE;
Andreas Langner, Freigericht, DE;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
A quartz glass tube as a semi-finished product for an optical component that has an inner bore extending along a tube center axis for the acceptance of a core rod and a tube wall limited by an inner casing surface and an outer casing surface is already known; within said tube wall an inner region made of a first quartz glass and an outer region made of a second quartz glass with a different index of refraction surrounding the inner region contact one another at a contact surface which runs around the center axis. In order to provide a quartz glass on this basis that facilitates the production of optical components for special applications such as laser-activated optical components in wand or fiber form, the invention states that the contact surface has a non-round course in the radial cross-section and the inner casing surface has a circular course.