Optical movement sensor

US4664129A · kind A · utility

Assignee

• U.S. Philips Corporation · US

Inventors

• Thomas Helzel · Kaltenkirchen, DE
• Jurgen Kordts · Wedel, DE
• Gerhard Martens · Henstedt-Ulzburg, DE

Key dates

• Filing date: Apr 9, 1986
• Grant date: May 12, 1987
• Expiry date: Apr 9, 2006

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2562/228
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An optical movement sensor for clearly accurately detecting deformations of a human body. The movement sensor consists of a belt with a buckle made up of two parts which are joined together mechanically by a light-transmitting sensor element. Transmitting and a receiving fibre optic light guides are connected to one part of the buckle in such a way that light emitted by the transmitting light guide passes through the sensor element by way of a polarizer and is coupled to the receiving light guide via an analyzer.