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Proceedings Paper

Self-calibrating shape-measuring system based on fringe projection
Author(s): Volker Kirschner; Wolfgang Schreiber; Richard M. Kowarschik; Gunther Notni
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Paper 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.

Paper Details

Date Published: 25 September 1997
PDF: 9 pages
Proc. SPIE 3102, Rapid Prototyping and Flexible Manufacturing, (25 September 1997); doi: 10.1117/12.281312
Show Author Affiliations
Volker Kirschner, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Wolfgang Schreiber, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Richard M. Kowarschik, Friedrich-Schiller-Univ. (Germany)
Gunther Notni, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)


Published in SPIE Proceedings Vol. 3102:
Rapid Prototyping and Flexible Manufacturing
Rolf-Juergen Ahlers; Gunther Reinhart, Editor(s)

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