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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 25 — Sep. 1, 2006
  • pp: 6381–6387

Three-dimensional surface contouring of macroscopic objects by means of phase-difference images

Daniel Velásquez Prieto and Jorge Garcia-Sucerquia  »View Author Affiliations

Applied Optics, Vol. 45, Issue 25, pp. 6381-6387 (2006)

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We report a technique to determine the 3D contour of objects with dimensions of at least 4 orders of magnitude larger than the illumination optical wavelength. Our proposal is based on the numerical reconstruction of the optical wave field of digitally recorded holograms. The required modulo 2 π phase map in any contouring process is obtained by means of the direct subtraction of two phase-contrast images under different illumination angles to create a phase-difference image of a still object. Obtaining the phase-difference images is only possible by using the capability of numerical reconstruction of the complex optical field provided by digital holography. This unique characteristic leads us to a robust, reliable, and fast procedure that requires only two images. A theoretical analysis of the contouring system is shown, with verification by means of numerical and experimental results.

© 2006 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(100.5070) Image processing : Phase retrieval
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure

Original Manuscript: December 12, 2005
Manuscript Accepted: April 16, 2006

Daniel Velásquez Prieto and Jorge Garcia-Sucerquia, "Three-dimensional surface contouring of macroscopic objects by means of phase-difference images," Appl. Opt. 45, 6381-6387 (2006)

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