Optical waveguide moldings made from silicon nitride and a method of detecting optical wavelengths using same

US5483614A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Martin Bruck · Hofheim, DE
• Tilo Vaahs · Kelkheim, DE
• Marcellus Peuckert · Hofheim, DE
• Ude Scheunemann · Bad Soden am Taunus, DE
• Thomas Stehlin · Kriftel, DE
• Jurgen Theis · Oberursel, DE

Key dates

• Filing date: Jul 21, 1994
• Grant date: Jan 9, 1996
• Expiry date: Jul 21, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A transparent molded article for optical applications made from silicon nitride and a coating thereon of oxidic silicon nitride formed by chemical reaction of the silicon nitride with oxygen. The moldings can be shaped, depending on the area of application, to give various articles, for example optical waveguides, prisms, sensor elements or lenses, and are used in all areas where high optical demands are made.