3D profiling by optical demodulation with an image intensifier

Heinrich A. Hoefler; Volker Jetter; Elmar E. Wagner

doi:10.1117/12.341068

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8 March 1999 3D profiling by optical demodulation with an image intensifier

Heinrich A. Hoefler, Volker Jetter, Elmar E. Wagner

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Proceedings Volume 3640, Three-Dimensional Image Capture and Applications II; (1999) https://doi.org/10.1117/12.341068
Event: Electronic Imaging '99, 1999, San Jose, CA, United States

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.

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Heinrich A. Hoefler, Volker Jetter, and Elmar E. Wagner "3D profiling by optical demodulation with an image intensifier", Proc. SPIE 3640, Three-Dimensional Image Capture and Applications II, (8 March 1999); https://doi.org/10.1117/12.341068

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