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Formvermessung mit Höhenschichtlinien

: Gerber, J.; Kowarschik, R.; Notni, G.; Schreiber, W.

Verein Deutscher Ingenieure e.V. -VDI-, Düsseldorf:
VDI-Seminar "Optische Oberflächenprüfung"
Düsseldorf: VDI-Verlag, 1992
Optische Oberflächenprüfung <1992, Freiburg>
Fraunhofer IOF ()
3-D-Messung; 3D-shape measurement; contouring; Formvermessung; fringe projection; Höhenschichtlinie; Koordinatenmessung; measurement of coordinates; phase shifting; Phasenschiebeverfahren; Streifenprojektion; strukturierte Beleuchtung; Zwei-Quellen-Methode

Noncontact automated optical methods of 3D-shape inspection of diffuse objects are steadily increasing within industrial product quality inspection. Using the contouring technique it is possible to determine all coordinates of a 3D-object by the same way - on the basis of phase values calculated from the intensity distributions on the object surface. The contour lines can be generated by fringe projection (incoherent) or with the so-called two-source-, two-refractive indices- or two-wavelengths methods (coherent). Within an object volume of (100 mm x 100 mm x 100 mm) an accuracy of measurements of plusminus Mym is reached for all coordinates of the object.