Process for the production of sequences of interface layers

US6393868B1 · kind B1 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Manfred Krauss · Jena, DE
• Hans-Georg Krolla · Mainz, DE
• Eckart Hussmann · Stadtilm, DE
• Bernhard Durschang · Rottendorf, DE
• Gerd Muller · Jena, DE

Key dates

• Filing date: Oct 19, 1999
• Grant date: May 28, 2002
• Expiry date: Oct 19, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03B23/037
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a novel process for the production of sequences of interference layers composed of layers i of prescribed thicknesses d(i) and refractive indices n(i). In this process a stack of at least two layers i of glasses having refractive indices n(i) and thicknesses d0(i), which are each larger than the predetermined thicknesses d(i) by the same multiplying factor, is provided. The stack is heated to a temperature above the transformation temperature of the glasses and during or after heating, the stack is drawn in such a manner that the individual layers obtain the prescribed thicknesses d(i). After this the drawn stack is cooled.