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Proceedings Paper

3D profiling by optical demodulation with an image intensifier
Author(s): Heinrich A. Hoefler; Volker Jetter; Elmar E. Wagner
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Paper Abstract

The acquirement of 3D-information is currently achieved by stereophotography, line and grid projection techniques or by laser scanning in combination with a fast distance measuring device. This paper describes a new principle using a single CCD-camera with an optical demodulator in front of it. The scene is illuminated by a high frequency intensity modulated light source. Demodulating the backscattered light by a gateable image intensifier yields a grey level image which directly corresponds to the object's form. Intensity variations within the image due to inhomogeneous object reflectivity or illumination intensity are overcome by a phase shift technology. Possible applications for such a 3D- camera industrial automation, medical and industrial endoscopic analyses, robotics or 3D-digitalization.

Paper Details

Date Published: 8 March 1999
PDF: 7 pages
Proc. SPIE 3640, Three-Dimensional Image Capture and Applications II, (8 March 1999); doi: 10.1117/12.341068
Show Author Affiliations
Heinrich A. Hoefler, Fraunhofer-Institute of Physical Measurement Techniques (Germany)
Volker Jetter, Fraunhofer-Institute of Physical Measurement Techniques (Germany)
Elmar E. Wagner, Fraunhofer-Institute of Physical Measurement Techniques (Germany)


Published in SPIE Proceedings Vol. 3640:
Three-Dimensional Image Capture and Applications II
Joseph H. Nurre; Brian D. Corner, Editor(s)

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