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Optical Engineering

Selective calculation for the improvement of reconstructed images in single-exposure generalized phase-shifting digital holography
Author(s): Masatoshi Imbe; Takanori Nomura
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Paper 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.

Paper Details

Date Published: 7 April 2014
PDF: 8 pages
Opt. Eng. 53(4) 044102 doi: 10.1117/1.OE.53.4.044102
Published in: Optical Engineering Volume 53, Issue 4
Show Author Affiliations
Masatoshi Imbe, Wakayama Univ. (Japan)
Takanori Nomura, Wakayama Univ. (Japan)


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