Apparatus for imaging the inner surface of a cavity within a workpiece

US8334971B2 · kind B2 · utility

Assignee

• HOMMEL-ETAMIC GmbH · DE

Inventors

• Hubert Keller · Amberg, DE
• Michael Rudolf · Ittigen, CH

Key dates

• Filing date: May 4, 2010
• Grant date: Dec 18, 2012
• Expiry date: Nov 9, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2021/8825
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An apparatus for imaging the inner surface of a cavity in a workpiece has an optical system including a panoramic field of view that is linked to an imager and a downstream evaluation device by an image communication link. The apparatus furthermore has an illumination system including a light source to illuminate an imaging region of the inner surface, which region has been captured by the optical system. According to the invention, the illumination system is disposed in such a way relative to optical system, and for which the beam path is selected in such a way, that a first axial section of the imaging region is able to be illuminated under brightfield illumination, while simultaneously a second axial region spaced apart from the first axial region is able to be illuminated under darkfield illumination.