Measuring device for measuring optical properties of transparent substrates

US8072607B2 · kind B2 · utility

Assignee

• VON ARDENNE Anlagentechnik GmbH · DE

Inventors

• Jochen Krause · Frankfurt, DE
• Holger Proehl · Dresden, DE

Key dates

• Filing date: Oct 30, 2007
• Grant date: Dec 6, 2011
• Expiry date: Mar 30, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J2001/0481
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A measuring device for measuring optical properties of transparent substrates includes a light transmitter and/or light receiver comprising a hollow cylinder having a highly reflective and diffusely dispersive inner surface. The light transmitter comprises a light source arranged in its interior and a light exit opening at a distance from the light source. The light receiver has a light sensor instead of the light source, at a distance from a light entrance opening. The light source and light sensor are arranged at such a distance from the light exit opening and light entrance opening respectively, given a corresponding direction of propagation of the light, that light emitted by the light source or received by the light sensor and multiply reflected in the hollow cylinder emerges as diffuse light from the light exit opening or is incident on the light sensor.