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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 19 — Jul. 1, 2008
  • pp: D154–D163

Suppression of phase ambiguity in digital holography by using partial coherence or specimen rotation

Zeev Zalevsky, Ofer Margalit, Emanuel Vexberg, Roy Pearl, and Javier Garcia  »View Author Affiliations


Applied Optics, Vol. 47, Issue 19, pp. D154-D163 (2008)
http://dx.doi.org/10.1364/AO.47.00D154


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Abstract

In this paper we present two approaches for extracting the surface profile as well as obtaining 3D imaging of near field objects by usage of partial coherence and digital holography. In the first approach a light source with given temporal partial coherence is used to illuminate a near field object. The reflected light is interfered with the reference source. By computing the local contrast of the generated fringes one may estimate the 3D topography and the profile of the object. This approach extracts the 3D information from a single image, and its accuracy does not depend on triangulation angle like in fringe projection methods. The second approach is tomography based. There we illuminate the object from several slightly different angles, and for each we compute the wrapped phase using digital holography techniques. Combining the wrapped phase estimation from several points of projection allows calculating the unwrapped phase and therefore the true profile of even a phase-only object. Increasing the number of points of view decreases the relative error of the estimated profile.

© 2008 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(150.6910) Machine vision : Three-dimensional sensing
(090.1995) Holography : Digital holography
(110.5086) Imaging systems : Phase unwrapping

History
Original Manuscript: September 27, 2007
Revised Manuscript: March 8, 2008
Manuscript Accepted: March 12, 2008
Published: April 22, 2008

Citation
Zeev Zalevsky, Ofer Margalit, Emanuel Vexberg, Roy Pearl, and Javier Garcia, "Suppression of phase ambiguity in digital holography by using partial coherence or specimen rotation," Appl. Opt. 47, D154-D163 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-19-D154

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