低能电子全息高分辨率三维数值重现研究——一种提高三维重现像分辨率的新方法  

3-D Numerical Reconstruction of Low Energy Electron High Resolution Holograms

作　　者：凌立[1] 孙毅[1] 顾昌鑫[1] 单莉英[1] 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《真空科学与技术学报》2005年第2期100-104,共5页Chinese Journal of Vacuum Science and Technology

基　　金：上海市科学技术委员会(No.0114nm069)

摘　　要：本文将一种基于多电子能量电子全息重现像加权叠加原理的方法,用于提高低能同轴电子全息的三维数值重现像分辨率,并以三层石墨晶体为样品进行了计算机模拟研究。结果表明,用该方法数值重现时可以有效地消除样品各层电子散射的干扰,并抑制数值重现过程中产生的虚假峰,从而改善了像质并明显地提高了三维重现分辨率。A three-dimensional numerical image processing technique, based on weighted superposition, has been successfully developed to reconstruct the inline low energy electron hologram and to improve its resolution. The hologram of a three-layer graphite crystal was simulated. The quality and resolution of the hologram were considerably improved. The results show that disturbance caused by interlayer electron scattering can be effectively removed and that pseudo-peak originating from hologram reconstruction can be avoided too.

关 键 词：数值重现 电子全息 三维 高分辨率 低能 叠加原理 电子能量 模拟研究 石墨晶体 电子散射 计算机 样品 同轴 

分 类 号：TB877[一般工业技术—摄影技术] O562.5[理学—原子与分子物理]