部分相干高分辨电子显微镜菲涅尔环的研究

本文提出对高分辨电子显微镜直边菲涅尔环理论研究的两个新的途径:一是,研究由于电子光学系统的带限性质以及它对电子波场的位相调制作用,而造成对菲涅尔环的影响。因为迄今为止,对菲涅尔环的理论研究,大多是基于将直边所形成的菲涅尔条纹,作为一个物面附近的虚物被再现于象面上这样一个物理模型,而设有计及电子光学系统本身的特性。二是,研究部分相干照明情形下,相干度对菲涅尔环的作用,从而克服通常文献在简化的相干前提下

A STUDY OF FRESNEL FRINGE ON HIGH-RESOLUTION ELECTRON MICROSCOPE UNDER PARTIALLY COHERENT ILLUMINATION

In this paper two new approaches to the study of the Fresnel fringe on high-resolution electron microscope are presented: namely, consideration of the boundary property and its regulation influence on the phase of the electronic wave field. Some experiment results not yet explained can be elucidated through calculations of the image-field distribution for plural transparency straight edge under partially coherent illumination.