A theoretical investigation into the 3D point spreading situation of a scanning holographic imaging system based on random phase encoding

A theoretical investigation into the 3D point spreading situation of a scanning holographic imaging system based on random phase encoding
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基于随机相位编码的扫描全息成像系统3D点扩散情况的理论研究

DOI:
10.1016/j.optlastec.2013.02.005
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发表时间:
2013-09
影响因子:
5
通讯作者:
Guo Xue-fan
Guo Xue-fan
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hu Jian-ping;Xie Jian;Wang Yun;Guo Xue-fan

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通过分析再现像的方差和噪声概率分布,研究了传统光学扫描全息(奥什)方法和基于随机相位编码(RPE)的新方法下相邻截面的点扩散情况。仿真结果表明,与传统的奥什相比,在相同的离焦距离下,RPE-奥什可以使重建的相邻截面分布更加均匀,在聚焦图像上表现为散斑状。进一步的研究表明,相邻剖面的复振幅概率分布符合高斯曲线的形状,相应的滤波器可以滤除噪声。因此,可以消除对焦图像上的混叠和干扰。
In this paper, by analyzing variance and noise probability distribution of the reconstructed image, a point spreading situation of adjacent section under the conventional optical scanning holography (OSH) method and a new one based on random-phase encoding (RPE) are studied. Simulation results show that, compared to the conventional OSH at the same de-focus distance, the RPE-OSH can lead the distribution of reconstructed adjacent sections to be more homogeneous and manifested as a speckle-like pattern on the in-focus image. Further study shows that the complex amplitude probability distribution of adjacent section meets the shape of Gaussian curve, and noise can be filtered out by some corresponding filters. So aliasing and interference on the in-focus image can be removed.
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