The 7th order geometrical aberration of rotationally symmetrical electron optic system and their expressions are given by using the eikonal method when the electric and magnetic fields exit.
应用光程函数法计算出旋转对称电子光学系统的7级几何像差，给出旋转对称电磁场同时存在情况下的系统7级几何像差表示式。
This paper describes a new multi ion and electron beam system for preparing optic thin films.
本文介绍一种新型的光学薄膜制备用多离子束电子束系统。
The optic microscopy and electron microscopy have been used to observe the morphology and structure of individual char particles, and determine their distribution during combustion.
本文利用光学显微镜和电镜，阐述了不同残炭颗粒的形态和结构以及它们在燃烧过程中的分布特征。
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