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Applied Optics

Applied Optics


  • Vol. 42, Iss. 25 — Sep. 1, 2003
  • pp: 5167–5172

Miniaturized digital holography sensor for distal three-dimensional endoscopy

Ervin Kolenovic, Wolfgang Osten, Reiner Klattenhoff, Songcan Lai, Christoph von Kopylow, and Werner Jüptner  »View Author Affiliations

Applied Optics, Vol. 42, Issue 25, pp. 5167-5172 (2003)

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A miniaturized sensor head for endoscopic measurements based on digital holography is described. The system was developed to measure the shape and the three-dimensional deformation of objects located at places to which there is no access by common measurement systems. 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 smaller than 10 mm. The system enables interferometric measurements to be made at speeds of as many as five reconstructions per second, and it can be used outside the laboratory under normal environmental conditions. Shape measurements are performed with two wavelengths for contouring, and the deformation is measured by digital holographic interferometry. To obtain full three-dimensional data in displacement measurements we illuminate the object sequentially from three different illumination directions. To increase the lateral resolution we use temporal phase shifting.

© 2003 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(090.1760) Holography : Computer holography
(090.2880) Holography : Holographic interferometry
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

Original Manuscript: January 10, 2003
Revised Manuscript: May 16, 2003
Published: September 1, 2003

Ervin Kolenovic, Wolfgang Osten, Reiner Klattenhoff, Songcan Lai, Christoph von Kopylow, and Werner Jüptner, "Miniaturized digital holography sensor for distal three-dimensional endoscopy," Appl. Opt. 42, 5167-5172 (2003)

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