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

机译：用于单次曝光广义相移数字全息术中重建图像改进的选择性计算

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摘要

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.
机译：单曝光广义相移数字全息术使人们能够从单个全息图中去除零阶和共轭项。对于相移，将随机复振幅编码波用作参考波。该编码波可以通过可商购的元件制成。提出了选择性计算来改善单次曝光广义相移数字全息术中重建图像的性能。根据图像传感器每个像素上参考波的复振幅量，使用了三个计算。与仅将三个计算之一应用于全息图相比，选择性计算提高了重建图像的质量。介绍了三个计算的推导以及计算数量为三个的原因。定义了一个参数，并使用该参数从这三个计算中选择适当的计算。讨论了在单次曝光广义相移数字全息术中用于改善重建图像的方法与先前方法之间的关系。两种实验结果证明了该方法的有效性。一个显示了对参考波散斑大小的依赖性。另一个显示了动态现象的可行性。

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