Optical filter having multi-layer coating

US5591529A · kind A · utility

Assignee

• Leybold GmBH · DE

Inventors

• Christoph Braatz · Großkrotzenburg, DE
• Joachim Szczyrbowski · Goldbach, DE
• Anton Zmelty · Hösbach, DE

Key dates

• Filing date: Mar 7, 1995
• Grant date: Jan 7, 1997
• Expiry date: Mar 7, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31678
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In a multi-layer coating for a material of good transparency for visible light, with an emissivity e<0.04 and a light transmission T.gtoreq.78% and with two silver layers of different thickness, three oxide coatings are provided, and very thin metal or metal suboxide coatings as blockers, the oxide layers being alloys of the metals SnMg, SnAl, SnZr, SnTi or SnTa.