Optical 3D coordinate-measuring system using structured light

Wolfgang Schreiber; Gunther Notni; Peter Kuehmstedt; Joerg Gerber; Richard M. Kowarschik

doi:10.1117/12.250792

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18 September 1996 Optical 3D-coordinate measuring system using structured light

Wolfgang Schreiber, Gunther Notni, Peter Kuehmstedt, Joerg Gerber, Richard M. Kowarschik

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Proceedings Volume 2782, Optical Inspection and Micromeasurements; (1996) https://doi.org/10.1117/12.250792
Event: Lasers, Optics, and Vision for Productivity in Manufacturing I, 1996, Besancon, France

Abstract

The paper is aimed at the description of an optical shape measuring technique based on a consistent principle using fringe projection technique. We demonstrate a real 3D- coordinate measuring system where the sale of coordinates is given only by the illumination-structures. This method has the advantages that the aberration of the observing system and the depth-dependent imaging scale have no influence on the measuring accuracy and, moreover, the measurements are independent of the position of the camera with respect to the object under test. Furthermore, it is shown that the influence of specular effects of the surface on the measuring result can be eliminated. Moreover, we developed a very simple algorithm to calibrate the measuring system. The measuring examples show that a measuring accuracy of 10^-4 (i.e. 10 micrometers ) within an object volume of 100 X 100 X 70 mm³ is achievable. Furthermore, it is demonstrated that the set of coordinate values can be processed in CNC- and CAD-systems.

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Wolfgang Schreiber, Gunther Notni, Peter Kuehmstedt, Joerg Gerber, and Richard M. Kowarschik "Optical 3D-coordinate measuring system using structured light", Proc. SPIE 2782, Optical Inspection and Micromeasurements, (18 September 1996); https://doi.org/10.1117/12.250792

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