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Proceedings Paper

Miniaturized sensor head for distal holographic endoscopy
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Paper Abstract

In this paper we describe a highly miniaturized sensor head based on digital holography for endoscopic measurements. The system was developed to measure the shape and the 3D-deformation of objects which are located at places that cannot be accessed by common measurement systems. Therefore, a miniaturized optical sensor including a complete digital-holographic interferometer with a CCD-camera is placed at the end of a flexible endoscope. The diameter of the head is less than 10 mm. The system enables interferometric measurements with a speed of three reconstructions per second and it can be used outside of the laboratory in a usual environment. Shape measurements are performed with two wavelength contouring, while the deformation is measured with digital holographic interferometry. To obtain full 3D-data in displacement measurements the object can be illuminated sequentially from three different illumination directions. To increase the lateral resolution temporal phase shifting is used.

Paper Details

Date Published: 3 October 2003
PDF: 9 pages
Proc. SPIE 5145, Microsystems Engineering: Metrology and Inspection III, (3 October 2003); doi: 10.1117/12.500404
Show Author Affiliations
Reiner Klattenhoff, Bremer Institut fuer Angewandte Strahltechnik (Germany)
Ervin Kolenovic, Bremer Institut fuer Angewandte Strahltechnik (Germany)
Wolfgang Osten, Institut fuer Technische Optik, Univ. Stuttgart (Germany)
Christoph von Kopylow, Bremer Institut fuer Angewandte Strahltechnik (Germany)
Werner P. O. Jueptner, Bremer Institut fuer Angewandte Strahltechnik (Germany)


Published in SPIE Proceedings Vol. 5145:
Microsystems Engineering: Metrology and Inspection III
Christophe Gorecki, Editor(s)

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