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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 2 — Jan. 28, 2013
  • pp: 2126–2132

Parallel two-step spatial carrier phase-shifting common-path interferometer with a Ronchi grating outside the Fourier plane

Mingguang Shan, Bengong Hao, Zhi Zhong, Ming Diao, and Yabin Zhang  »View Author Affiliations

Optics Express, Vol. 21, Issue 2, pp. 2126-2132 (2013)

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A parallel two-step spatial carrier phase-shifting common-path interferometer with a Ronchi grating placed outside the Fourier plane is proposed in this paper for quantitative phase imaging. Two phase-shifted interferograms with spatial carrier can be captured simultaneously using the proposed interferometer. The dc term can be eliminated by subtracting the two phase-shifted interferograms, and the phase of a specimen can be reconstructed through Fourier transform. The validity and stability of the interferometer proposed are experimentally demonstrated via the measurement of a phase plate.

© 2013 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: November 27, 2012
Revised Manuscript: January 10, 2013
Manuscript Accepted: January 10, 2013
Published: January 18, 2013

Mingguang Shan, Bengong Hao, Zhi Zhong, Ming Diao, and Yabin Zhang, "Parallel two-step spatial carrier phase-shifting common-path interferometer with a Ronchi grating outside the Fourier plane," Opt. Express 21, 2126-2132 (2013)

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