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Proceedings Paper

Three-dimensional contouring by an optical radar system
Author(s): Heinrich A. Hoefler; Gerhard Schmidtke; Volker Jetter; A. Henninger
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Paper Abstract

Dimensional measurement techniques are requested to determine distance and length measurement, for two and three dimensional profiling or for volume determination. To meet the requirements of numerous tasks in process monitoring or quality control different measurement principles are available. Out of the 3-D methods, the reported optical radar shows special advantages: * short data acquisition period, * co-axial optics, * high accuracy for the determination of the distance, and * quick and straightforward data evaluation. In this context, a system based on the method of optical radar is described in more detail. The system provides data for three-dimensional scene analysis with the spatial coordinates of a surface to be determined within a pre-defmed volume. A complete 3-D picture with 500 x 500 pixels is recorded and evaluated within less than 2 seconds. The role of speckles limiting the accuracy of the measurement is described in some detail, too.

Paper Details

Date Published: 6 January 1994
PDF: 8 pages
Proc. SPIE 2348, Imaging and Illumination for Metrology and Inspection, (6 January 1994); doi: 10.1117/12.198848
Show Author Affiliations
Heinrich A. Hoefler, Fraunhofer-Institute of Physical Measurement Techniques (Germany)
Gerhard Schmidtke, Fraunhofer-Institute of Physical Measurement Techniques (Germany)
Volker Jetter, Fraunhofer-Institute of Physical Measurement Techniques (Germany)
A. Henninger, Fraunhofer-Institute of Physical Measurement Techniques (Germany)


Published in SPIE Proceedings Vol. 2348:
Imaging and Illumination for Metrology and Inspection
Donald J. Svetkoff, Editor(s)

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