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Proceedings Paper

White light heterodyne principle for 3D-measurement
Author(s): Carsten Reich; Reinhold Ritter; Jan Thesing
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Paper Abstract

3D-measurement systems based on active triangulation using projection of structured light and recording by CCD-cameras are gaining more and more importance in industrial application. Their advantages compared to conventional coordinate measurement machines are the non-contact measurement and the fast acquisition of dense point clouds. This paper presents an alternative method to the well-known combination of Graycode and phase-shift projection. It will be shown how to use the heterodyne principle for overcoming the unwrapping problem of phase functions and for estimating the parameters for a reliable unwrapping procedure. The redundant phase information is used to increase the accuracy of the photogrammetrical 3D-coordinate determination. Finally, the heterodyne principle is used to realize on-line measurement based on color-coded fringe projection.

Paper Details

Date Published: 25 September 1997
PDF: 9 pages
Proc. SPIE 3100, Sensors, Sensor Systems, and Sensor Data Processing, (25 September 1997); doi: 10.1117/12.287750
Show Author Affiliations
Carsten Reich, Technical Univ. Braunschweig (Germany)
Reinhold Ritter, Technical Univ. Braunschweig (Germany)
Jan Thesing, Technical Univ. Braunschweig (Germany)

Published in SPIE Proceedings Vol. 3100:
Sensors, Sensor Systems, and Sensor Data Processing
Otmar Loffeld, Editor(s)

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