Industrial inspection of specular surfaces using a new calibration procedure

Petra Aswendt; Roland Hofling; Soren Gartner

doi:10.1117/12.621587

13 June 2005 Industrial inspection of specular surfaces using a new calibration procedure

Petra Aswendt, Roland Hofling, Soren Gartner

Proceedings Volume 5856, Optical Measurement Systems for Industrial Inspection IV; (2005) https://doi.org/10.1117/12.621587
Event: Optical Metrology, 2005, Munich, Germany

Abstract

The methodology of phase encoded reflection measurements has become a valuable tool for the industrial inspection of components with glossy surfaces. The measuring principle provides outstanding sensitivity for tiny variations of surface curvature so that sub-micron waviness and flaws are reliably detected. Quantitative curvature measurements can be obtained from a simple approach if the object is almost flat. 3D-objects with a high aspect ratio require more effort to determine both coordinates and normal direction of a surface point unambiguously. Stereoscopic solutions have been reported using more than one camera for a certain surface area. This paper will describe the combined double camera steady surface approach (DCSS) that is well suited for the implementation in industrial testing stations

Citation Download Citation

Petra Aswendt, Roland Hofling, and Soren Gartner "Industrial inspection of specular surfaces using a new calibration procedure", Proc. SPIE 5856, Optical Measurement Systems for Industrial Inspection IV, (13 June 2005); https://doi.org/10.1117/12.621587

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