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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 22 — Oct. 26, 2009
  • pp: 20415–20429

Spatial phase-shifting characteristic of double grating interferometer

Yang Song, YunYun Chen, Anzhi He, and Zhimin Zhao  »View Author Affiliations

Optics Express, Vol. 17, Issue 22, pp. 20415-20429 (2009)

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Double grating interferometer is usually used to achieve phase information from distorted wave front by its temporal phase-shifting characteristic. In this paper, the spatial phase-shifting characteristic of double grating interferometer is presented. The explicit intensity distributions of interferograms produced by double gratings are derived with the scalar diffraction theory, and the stable phase shift is found between plus-first, zero and minus-first order interferograms. Results indicate that the phase shift only depends on the grating period and the distance between two gratings if no phase object exists. If phase object exists, it varies on the interferograms. But the phase shifts are equal at any special point of interferograms. In particular, the triple grating interferometer is presented to generate at least four phase shift interferograms simultaneously with the similar method.

© 2009 OSA

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(050.5080) Diffraction and gratings : Phase shift
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4120) Instrumentation, measurement, and metrology : Moire' techniques

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: August 20, 2009
Revised Manuscript: October 4, 2009
Manuscript Accepted: October 4, 2009
Published: October 23, 2009

Yang Song, YunYun Chen, Anzhi He, and Zhimin Zhao, "Spatial phase-shifting characteristic of double grating interferometer," Opt. Express 17, 20415-20429 (2009)

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