Coordinate measuring apparatus having a bridge configuration

US6161298A · kind A · utility

Assignee

• Carl Zeiss Stiftung · DE

Inventors

• Ralf Bernhardt · Aalen, DE
• Volker Piwek · Aalen, DE
• Franz Woletz · Oberkochen, DE
• Klaus Jacobs
• Werner Leitenberger · Schlier, DE

Key dates

• Filing date: May 13, 1999
• Grant date: Dec 19, 2000
• Expiry date: May 13, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B5/008
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention is directed to a coordinate measuring apparatus in bridge configuration wherein a bridge spanning the measuring pad is guided on two guides laterally of the measuring pad. To avoid measurement errors, which are caused by different warming of the coordinate measuring apparatus, the guides are mounted on the support rods which have a low thermal coefficient of expansion and the support rods are arranged in a support structure.