Coordinate measuring machine having an improved optical sensing system and related method

US10309765B2 · kind B2 · utility

Assignee

• Carl Zeiss Industrielle Messtechnik GmbH · DE

Inventors

• Dominik Seitz · Schwäbisch Gmünd, DE
• Frank Widulle · Neu-Ulm, DE
• Philipp Jester · Heidenheim, DE
• Aksel Goehnermeier · Aalen, DE
• Christoph Graf Vom Hagen · Oakland, US
• Andreas Ebser · Wertingen, DE
• Andreas Moebius · Jena, DE

Key dates

• Filing date: Apr 19, 2017
• Grant date: Jun 4, 2019
• Expiry date: Apr 19, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N23/56
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Coordinate measuring machine, comprising an optical sensor for capturing image data of a workpiece. The optical sensor comprises a lens, which defines an optical axis, and an illumination device for illuminating the workpiece. The illumination device comprises a diffusely radiating luminous body and an optical filter having a plurality of separate light passages. Light emitted by the luminous body enters the filter on an underside thereof, passes through the light passages and emerges again from the filter on an opposite top side thereof. Each of the light passages transmits only light rays that form an angle smaller than a predefined limiting angle with a longitudinal axis of the respective light passage. The lens and the filter are inclined relative to one another in such a way that a normal vector aligned perpendicularly to the top side of the filter forms an inclination angle other than 0° with the optical axis.