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Optical Review

, Volume 24, Issue 3, pp 351–360 | Cite as

Spatially incoherent Fourier digital holography by four-step phase-shifting rotational shearing interferometer and its image quality

Regular Paper

Abstract

Spatially incoherent Fourier digital holography using a rotational shearing interferometer for four-step phase-shifting method is proposed. The previous incoherent Fourier holography using a rotational shearing interferometer [Watanabe and Nomura (Appl. Opt. 54:A18, 2015)] employs the two-step phase-shifting method in the vertical and horizontal polarizations. The reconstructed image contains a large bias term. This paper proposes introduction of two kinds of wave plates in one path of a rotational shearing interferometer for a four-step phase-shifting method. A Fourier hologram is obtained from the four recorded holograms for eliminating the bias term and the twin image. The numerical simulation and the optical experiment demonstrate improvement of the image quality of reconstructed image by the twin image and bias level reduction. Furthermore, the effect of the size of an image sensor on the image quality in rotational shearing interferometer is also investigated by the numerical simulations.

Keywords

Digital holography Incoherent holography Phase-shifting Fourier holography Rotational shearing interferometer 

Notes

Acknowledgements

The authors thank T. Matsuda for his experimental supports and fruitful discussion.

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Copyright information

© The Optical Society of Japan 2017

Authors and Affiliations

  1. 1.Graduate School of Systems EngineeringWakayama UniversityWakayamaJapan
  2. 2.Research Fellow of Japan Society for the Promotion of ScienceChiyodaJapan
  3. 3.Faculty of Systems EngineeringWakayama UniversityWakayamaJapan

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