Zirconium-containing borosilicate glasses

US4200467A · kind A · utility

Assignee

• Ernst Leitz Wetzlar, GmbH · DE

Inventors

• Heinz Broemer · Wetzlar, DE
• Werner Huber · Witzenhausen, DE
• Norbert Meinert · Witzenhausen, DE

Key dates

• Filing date: Jun 28, 1978
• Grant date: Apr 29, 1980
• Expiry date: Jun 28, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S501/903
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed are zirconium-containing borosilicate glass compositions having a refractive index n.sub.e between 1.55 and 1.72, and Abbe number .nu..sub.e between 50 and 34 and a negative anomalous partial dispersion value .DELTA..nu..sub.e between -3.0 and -7.7. Also disclosed is a process for the production of such glass compositions.