Optical method and arrangement for measuring a periodic value having at least one frequency component

US6208129A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Michael Willsch · Jena, DE
• Thomas Bosselmann · Erlangen, DE
• Peter Menke · Erlangen, DE
• Stefan Hain · Rückersbach, DE

Key dates

• Filing date: Aug 18, 1998
• Grant date: Mar 27, 2001
• Expiry date: Aug 18, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R15/247
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Polarized measuring light propagates through a sensor device and is then split into two differently linearly polarized partial light signals. An intensity-normalized measuring signal is derived from the two partial light signals and their direct components.