Miniaturized sensor head for distal holographic endoscopy

Reiner Klattenhoff; Ervin Kolenovic; Wolfgang Osten; Christoph von Kopylow; Werner P. O. Jueptner

doi:10.1117/12.500404

3 October 2003 Miniaturized sensor head for distal holographic endoscopy

Reiner Klattenhoff, Ervin Kolenovic, Wolfgang Osten, Christoph von Kopylow, Werner P. O. Jueptner

Proceedings Volume 5145, Microsystems Engineering: Metrology and Inspection III; (2003) https://doi.org/10.1117/12.500404
Event: Optical Metrology, 2003, Munich, Germany

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.

Citation Download Citation

Reiner Klattenhoff, Ervin Kolenovic, Wolfgang Osten, Christoph von Kopylow, and Werner P. O. Jueptner "Miniaturized sensor head for distal holographic endoscopy", Proc. SPIE 5145, Microsystems Engineering: Metrology and Inspection III, (3 October 2003); https://doi.org/10.1117/12.500404

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