Illumination device with an extended useable spectrum

US9366795B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Thomas Weingaertner · Memmelsdorf, DE
• Lothar Willmes · Obermoschel, DE
• Bernd Schultheis · Bad Kreuznach, DE

Key dates

• Filing date: May 12, 2014
• Grant date: Jun 14, 2016
• Expiry date: Nov 12, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/04
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An illumination device for irradiating objects with electromagnetic radiation is provided. The illumination device includes at least one light guide and a radiation source that emits electromagnetic radiation in the spectral region from 320 nm to 420 nm into the light guide. The light guide is formed of a glass that has a spectral transmittance of at least 70% at 350 nm and is selected from the system of lead-free silicate-tin glasses.