Optoelectronical position detection

US6240652A · kind A · utility

Assignee

• Leopold KOSTAL GmbH & Co. KG · DE

Inventors

• Ralf Bobel · Dortmund, DE
• Frank Blasing · Werl, DE

Key dates

• Filing date: Jul 13, 1999
• Grant date: Jun 5, 2001
• Expiry date: Jul 13, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D2205/773
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An optoelectronic position detecting device for determining the absolute path or angle of two bodies which are moved relative to each other, comprising a light source 3, a transmitter element 2 which is partially exposed to light by the light source 3 and comprises a coding and which transmitter element 2 is coupled to the movement of the movable body, wherein the coding is provided in the form of a scanning trace 6, which is produced by virtue of the exposure to light, and a reference trace 7, and comprising a photosensitive line sensor 4 which is disposed in a fixed manner with respect to the transmitter element 2 for the purpose of scanning the code traces 6, 7 of the transmitter element 2, which output signals of the line sensor 4 influence an electronic evalutating unit for the purpose of determining the absolute path or angle, is determined by virtue of the fact that the transmitter element 2 is formed as a light-guiding body, into whose edge peripheral surface are coupled the light beams emitted by the light source 3, which transmitter element 2 comprises reflection surfaces R.sub.1, R.sub.2 for the purpose of forming the code traces, on which reflection surfaces the coupled…