Autofocusing in optical scanning holography
Autofocusing in optical scanning holography
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DOI：
10.1364/ao.48.00h153
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发表时间：
2009-12-01
期刊：
影响因子：
1.9
通讯作者：
Poon, Ting-Chung
中科院分区：
文献类型：
--
作者：
Kim, Taegeun;Poon, Ting-Chung
本文介绍了光学扫描全息（奥什）中的自动聚焦，并给出了实验结果。我们首先使用奥什记录物体的复全息图，然后使用高斯低通滤波创建菲涅耳波带片（FZP），该波带片在物体的深度范围内编码物体常数。随后，我们合成一个真正的只有光谱全息图中，其相位项包含有关的距离参数的信息。最后，我们利用条纹调整滤波和维格纳分布从纯实光谱全息图中提取距离参数。利用提取的距离参数，我们使用数字卷积从复全息图重建物体的三维图像，这绕过了传统的盲卷积重建全息图。据我们所知，这是第一个报告的实验结果，自动聚焦在奥什是可能的，没有任何搜索算法或跟踪过程。(C)2009年美国光学学会
We present autofocusing in optical scanning holography (OSH) with experimental results. We first record the complex hologram of an object using OSH and then create the Fresnel zone plate (FZP) that codes the object constant within the depth range of the object using Gaussian low-pass filtering. We subsequently synthesize a real-only spectrum hologram in which its phase term contains information about a distance parameter. Finally, we extract the distance parameter from the real-only spectrum hologram using fringe-adjusted filtering and the Wigner distribution. Using the extracted distance parameter, we reconstruct a three-dimensional image of the object from the complex hologram using digital convolution, which bypasses the conventional blind convolution to reconstruct a hologram. To the best of our knowledge, this is the first report with experimental results that autofocusing in OSH is possible without any searching algorithm or tracking process. (C) 2009 Optical Society of America