Quartz glass tube as a semi-finished product for an optical component

US10183886B2 · kind B2 · utility

Assignee

• HERAEUS QUARZGLAS GMBH & CO. KG · DE

Inventors

• Gerhard Schötz · Hanau, DE
• Karsten Bräuer · Bruchköbel, DE
• Richard Schmidt · Hammersbach, DE
• Peter Bauer · Siegburg, DE
• Andreas Schultheis · Langenselbold, DE
• Clemens Schmitt · Walldürn, DE
• Andreas Langner · Alzenau, DE

Key dates

• Filing date: Jan 17, 2013
• Grant date: Jan 22, 2019
• Expiry date: Aug 21, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2935
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

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.