通过强度传输方程获取的相位图中空间分辨率的实验评估
Experimental evaluation of spatial resolution in phase maps retrieved by transport of intensity equation.
作者信息
Zhang Xiaobin, Oshima Yoshifumi
机构信息
School of Materials Science, JAIST, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan JST-CREST, 7-gobancho, Chiyoda-ku, Tokyo 102-0075, Japan
School of Materials Science, JAIST, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan JST-CREST, 7-gobancho, Chiyoda-ku, Tokyo 102-0075, Japan.
出版信息
Microscopy (Oxf). 2015 Dec;64(6):395-400. doi: 10.1093/jmicro/dfv045. Epub 2015 Aug 12.
The transport of intensity equation (TIE) is a convenient method of obtaining a potential distribution, as it requires only three transmission electron microscopy images with different amounts of defocus. However, the spatial resolution of the TIE phase map has not yet been evaluated experimentally. In this study, we investigated the phase distribution of spherical gold nanoparticles and its dependence on the defocus difference and found that the spatial resolution was finer than 2 nm, even for a defocus difference of 4 µm. Theoretical calculations reproduced the experimental results well.
强度传输方程（TIE）是一种获取电位分布的便捷方法，因为它仅需要三张具有不同散焦量的透射电子显微镜图像。然而，TIE相位图的空间分辨率尚未通过实验进行评估。在本研究中，我们研究了球形金纳米颗粒的相位分布及其对散焦差异的依赖性，发现即使散焦差异为4 µm，空间分辨率也优于2 nm。理论计算很好地再现了实验结果。
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