narrow illumination cone

This article firstly describes diffraction contrast and similar electron diffraction,then introduces present status of electron microscope and some notices in the observing process of dark field image,finally analyzes effective hollow light cone illumination dark field image of nanometer multiphase metallic structure and its characteristics.

最后,对分析纳米多相结构的有效空心光锥照明暗场像及其特征,作一介绍。

The contrastive experiments between image processing methods usually applied for illumination compensation and the illumination cone method based on model are performed.

将常用于光照补偿的图像处理方法和基于模型的光照锥方法进行了对比实验,实验结果表明光照锥方法具有更好的补偿效果。