Zinc sulfide body for optical purposes

US4303635A · kind A · utility

Assignee

• W. C. Heraeus GmbH · DE

Inventors

• Fritz Aldinger · Rodenbach, DE
• Waltraud Werdecker · Hanau, DE

Key dates

• Filing date: May 15, 1980
• Grant date: Dec 1, 1981
• Expiry date: May 15, 2000

Classification

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

Abstract

Optical-grade zinc sulfide bodies produced by the CVD technique and subjected to an aftertreatment under a high gas pressure and at elevated temperature possess improved optical properties. They are suited for use as infrared windows.