Light waveguide having three protective layers of plastic material and a method of manufacture

US4854668A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Ernst Mayr · Starnberg, DE
• Ulrich Oestreich · Munich, DE
• Erich Weil · Munich, DE

Key dates

• Filing date: Apr 4, 1988
• Grant date: Aug 8, 1989
• Expiry date: Apr 4, 2008

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/4486
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical fiber having a multiple layer coating characterized by the inside layer being composed of a material that is stretched onto the bare fiber. Preferably, the inside layer is applied by extruding a stretch cone and stretching this onto the fiber. An intermediate layer can be applied onto the inside layer, either by a pressure molding system or by a stretched cone method, and an outside layer is applied by another extruder forming a stretched cone.