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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 29 — Oct. 10, 2004
  • pp: 5429–5437

Two-wavelength method for endoscopic shape measurement by spatial phase-shifting speckle-interferometry

Jochen Kandulla, Björn Kemper, Sabine Knoche, and Gert von Bally  »View Author Affiliations


Applied Optics, Vol. 43, Issue 29, pp. 5429-5437 (2004)
http://dx.doi.org/10.1364/AO.43.005429


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Abstract

A two-wavelength method for endoscopic topography reconstruction is introduced that can be applied to out-of-plane sensitive electronic-speckle-pattern interferometry systems based on rigid endoscope imaging systems. The surface measurement is performed by detection of the phase-difference distribution affected by a change in the applied laser wavelength. Furthermore, the off-axis endoscopic illumination geometry is taken into account by an approximation. Experimental results of the characterization of the endoscopic surface reconstruction technique and the measurement accuracy obtained are described and discussed. Finally, the applicability of the method is demonstrated with results from the topographic reconstruction of a free-form surface.

© 2004 Optical Society of America

OCIS Codes
(120.2880) Instrumentation, measurement, and metrology : Holographic interferometry
(120.6160) Instrumentation, measurement, and metrology : Speckle interferometry

History
Original Manuscript: April 7, 2004
Revised Manuscript: July 8, 2004
Published: October 10, 2004

Citation
Jochen Kandulla, Björn Kemper, Sabine Knoche, and Gert von Bally, "Two-wavelength method for endoscopic shape measurement by spatial phase-shifting speckle-interferometry," Appl. Opt. 43, 5429-5437 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-29-5429


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