Selective calculation for the improvement of reconstructed images in single-exposure generalized phase-shifting digital holography

Masatoshi Imbe; Takanori Nomura

doi:10.1117/1.OE.53.4.044102

7 April 2014 Selective calculation for the improvement of reconstructed images in single-exposure generalized phase-shifting digital holography

Masatoshi Imbe, Takanori Nomura

Author Affiliations +

Optical Engineering, Vol. 53, Issue 4, 044102 (April 2014). https://doi.org/10.1117/1.OE.53.4.044102

Abstract

Single-exposure generalized phase-shifting digital holography enables one to remove the zeroth-order and conjugate terms from the single hologram. For the phase-shifting, a random-complex-amplitude encoded wave is used as the reference wave. This encoded wave can be made by a commercially available element. Selective calculation is proposed for the improvement of reconstructed images in single-exposure generalized phase-shifting digital holography. Three calculations are used as a function of the complex amplitude quantities of the reference wave on the each pixel of the image sensor. The selective calculation improves the quality of the reconstructed image compared with applying only one of the three calculations to the hologram. The derivation of the three calculations and the reason why the number of calculations is three are presented. A parameter is defined and used to select the appropriate calculation from the three calculations. Relationships between the proposed method and the previous method for the improvement of the reconstructed images in single-exposure generalized phase-shifting digital holography are discussed. Two kinds of experimental results are given to confirm the effectiveness of the proposed method. One shows the dependence on the speckle size of the reference wave. The other shows the feasibility to dynamic phenomena.

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Masatoshi Imbe and Takanori Nomura "Selective calculation for the improvement of reconstructed images in single-exposure generalized phase-shifting digital holography," Optical Engineering 53(4), 044102 (7 April 2014). https://doi.org/10.1117/1.OE.53.4.044102

Published: 7 April 2014

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