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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 23, Iss. 2 — Feb. 1, 2006
  • pp: 298–305

Optical tomography of transparent objects with phase-shifting interferometry and stepwise-shifted Ronchi ruling

Cruz Meneses-Fabian, Gustavo Rodriguez-Zurita, and Víctor Arrizón  »View Author Affiliations


JOSA A, Vol. 23, Issue 2, pp. 298-305 (2006)
http://dx.doi.org/10.1364/JOSAA.23.000298


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Abstract

An experimental setup for tomographic inspection of phase objects is presented. The system uses a common-path interferometer consisting of two windows in the input plane and a translating grating as its pupil. In the output, interference of the fields associated with replicated windows is achieved by a proper choice of the windows’ spacing with respect to the grating period. With a rotating object in one window and a plane wave in the second one, the phase distribution of each projection is encoded as a corresponding digital image row, which, in turn, constructs a composite interferogram over the plane of a traditional sinogram. Phase stepping of composite interferograms can be achieved by a proper translation of the grating in order to obtain the unwrapped phase distribution as the corresponding sinogram. This sinogram allows tomographic reconstruction of phase slices by standard procedures. Composite interferograms and reconstructions for some transparent samples are shown.

© 2006 Optical Society of America

OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(070.6110) Fourier optics and signal processing : Spatial filtering
(100.6950) Image processing : Tomographic image processing
(110.6960) Imaging systems : Tomography
(120.3180) Instrumentation, measurement, and metrology : Interferometry

ToC Category:
Imaging Systems

History
Original Manuscript: March 7, 2005
Revised Manuscript: July 7, 2005
Manuscript Accepted: July 8, 2005

Citation
Cruz Meneses-Fabian, Gustavo Rodriguez-Zurita, and Víctor Arrizón, "Optical tomography of transparent objects with phase-shifting interferometry and stepwise-shifted Ronchi ruling," J. Opt. Soc. Am. A 23, 298-305 (2006)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-23-2-298

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