Iterative method for zero-order suppression in off-axis digital holography.
Iterative method for zero-order suppression in off-axis digital holography.
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DOI：
10.1364/oe.18.015318
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发表时间：
2010-07
期刊：
影响因子：
3.8
通讯作者：
N. Pavillon;C. Arfire;I. Bergoënd;C. Depeursinge
中科院分区：
文献类型：
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作者：
N. Pavillon;C. Arfire;I. Bergoënd;C. Depeursinge
我们提出了一种基于迭代原理来抑制全息图中所谓的零阶项的方法。在全息图采集过程中，编码信息包括产生干涉图案的两束光束的强度，其中不包含有关记录的复杂波前的信息，并且可能会破坏重建信号。所提出的方法通过利用迭代过程中波前重建期间获得的信息来选择性地抑制零阶项，从而无需任何关于物体的先验知识就可以抑制零阶项。对该方法进行了解析分析并研究了其收敛性。然后，通过实验展示其性能。通过将该程序应用于各种类型的全息图（例如显微标本的地形图像或散斑全息图）来评估其稳健性。
We propose a method to suppress the so-called zero-order term in a hologram, based on an iterative principle. During the hologram acquisition process, the encoded information includes the intensities of the two beams creating the interference pattern, which do not contain information about the recorded complex wavefront, and that can disrupt the reconstructed signal. The proposed method selectively suppresses the zero-order term by employing the information obtained during wavefront reconstruction in an iterative procedure, thus enabling its suppression without any a priori knowledge about the object. The method is analyzed analytically and its convergence is studied. Then, its performance is shown experimentally. Its robustness is assessed by applying the procedure on various types of holograms, such as topographic images of microscopic specimens or speckle holograms.