Self-calibrating shape-measuring system based on fringe projection

Volker Kirschner; Wolfgang Schreiber; Richard M. Kowarschik; Gunther Notni

doi:10.1117/12.281312

25 September 1997 Self-calibrating shape-measuring system based on fringe projection

Volker Kirschner, Wolfgang Schreiber, Richard M. Kowarschik, Gunther Notni

Proceedings Volume 3102, Rapid Prototyping and Flexible Manufacturing; (1997) https://doi.org/10.1117/12.281312
Event: Lasers and Optics in Manufacturing III, 1997, Munich, Germany

Abstract

The goal of optical 3D-measurements is the determination of Cartesian coordinates of surfaces. Using principles basing on fringe projection techniques coordinates are calculated of measured phases in fringes, image-coordinates of cameras and parameters of the system configuration. Mostly, three measured values unambiguous lead to one coordinate-tripel. A more comfortable way offers photogrammetric measurements where more than three values are measured to calculate coordinates and additional to parameters describing the system configuration. Applying these experiences to fringe projection techniques it is possible to combine the advantages of both techniques. That guarantees high number of object points, quick data acquirement and a simultaneous determination of coordinates and system parameters with photogrammetric bundle adjustment. Recent measurements show the capabilities of that principle. The reliability of the coordinates is given by a standard deviation of less than 10 microns while the object diameter was up to 280 mm.

Citation Download Citation

Volker Kirschner, Wolfgang Schreiber, Richard M. Kowarschik, and Gunther Notni "Self-calibrating shape-measuring system based on fringe projection", Proc. SPIE 3102, Rapid Prototyping and Flexible Manufacturing, (25 September 1997); https://doi.org/10.1117/12.281312

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