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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 25 — Sep. 1, 2014
  • pp: 5620–5631

Carrier peak isolation from single interferogram using spectrum shift technique

Satoshi Tomioka, Shusuke Nishiyama, and Samia Heshmat  »View Author Affiliations


Applied Optics, Vol. 53, Issue 25, pp. 5620-5631 (2014)
http://dx.doi.org/10.1364/AO.53.005620


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Abstract

This paper presents a new method to obtain a wrapped phase distribution from a single interferogram with a spatial carrier modulation. The Fourier transform of the interferogram has three peaks: one is a dc peak around the origin in the Fourier domain, and the other two are carrier peaks that have information of phase modulation by an object placed in the interferometer. Since the wrapped phase can be evaluated by one of the two carrier peaks, the dc peak and the adjoint peak that is the other peak of two carrier peaks should be removed by filters. The proposed filtering process consists of two stages: dc peak filtering and adjoint peak filtering. A spectrum shift filter based on symmetrical characteristics of the spectrum is applied in both stages as a basic filter that can remove most of the undesired spectrum. An additional two filters are applied to remove the remaining spectrum. The new method can automatically isolate the carrier peak, even when the boundary of peaks is not very clear. Numerical evaluations of simulation data and experimental data demonstrate that the proposed method can successfully isolate the carrier peak.

© 2014 Optical Society of America

OCIS Codes
(070.4790) Fourier optics and signal processing : Spectrum analysis
(100.2650) Image processing : Fringe analysis
(100.5070) Image processing : Phase retrieval
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(070.2615) Fourier optics and signal processing : Frequency filtering
(100.5088) Image processing : Phase unwrapping

ToC Category:
Image Processing

History
Original Manuscript: April 7, 2014
Revised Manuscript: July 23, 2014
Manuscript Accepted: July 24, 2014
Published: August 22, 2014

Citation
Satoshi Tomioka, Shusuke Nishiyama, and Samia Heshmat, "Carrier peak isolation from single interferogram using spectrum shift technique," Appl. Opt. 53, 5620-5631 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-25-5620


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