DESIGN OF 3-ELEMENT ELECTROSTATIC ELECTRON LENSES

被引：28

作者：

HEDDLE, DWO

机构：

来源：

JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS | 1969年 / 2卷 / 12期

关键词：

D O I：

10.1088/0022-3735/2/12/308

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A procedure is described by which the focal properties of a three-element lens can be determined in terms of the properties of two-element lenses. Examples are given in some detail of the design of lenses to meet specific requirements and a graph is presented which can be used to design a lens of unit magnification which will work over a specified extreme voltage ratio in the range 6·25:1 to 170:1. The range of applicability of the method is discussed and a comparison made with measurements by Imhof and Read where only a limited agreement is expected. This comparison supports both the method and its limitations.

引用

页码：1046 / &