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Applied Optics

Applied Optics


  • Vol. 40, Iss. 16 — Jun. 1, 2001
  • pp: 2692–2697

Comparative study of various endoscopes for pulsed digital holographic interferometry

Staffan Schedin, Giancarlo Pedrini, Hans J. Tiziani, and Anil K. Aggarwal  »View Author Affiliations

Applied Optics, Vol. 40, Issue 16, pp. 2692-2697 (2001)

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A comparison of several endoscopes as object image carriers in pulsed digital holography is presented. Three multicore flexible fiber endoscopes of different spatial resolution and one rigid endoscope are investigated. The four endoscopes are integrated in a setup for the recording of digital holograms on a CCD camera. A double-pulsed ruby laser is used as the light source. A spatial carrier is introduced by an off-axis reference beam, which permits quantitative evaluation of the phase difference between two holograms recorded with a short time separation (5–600 µs). From reported studies it may be inferred that the quality of the phase maps so derived from digital holographic interferometry has a strong correlation to the spatial resolution of the multicore fiber used in these endoscopes. With the endoscopic technique combined with pulsed digital holography a number of useful applications (in areas such as medical endoscopy, micromechanics, and microelectronics) are envisaged for which access to the objects of interest is otherwise difficult.

© 2001 Optical Society of America

OCIS Codes
(090.2880) Holography : Holographic interferometry
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(170.2150) Medical optics and biotechnology : Endoscopic imaging

Original Manuscript: August 28, 2000
Revised Manuscript: February 20, 2001
Published: June 1, 2001

Staffan Schedin, Giancarlo Pedrini, Hans J. Tiziani, and Anil K. Aggarwal, "Comparative study of various endoscopes for pulsed digital holographic interferometry," Appl. Opt. 40, 2692-2697 (2001)

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