磁浸没透镜的宽束曲轴像差理论  

Theory of Curved Axes Aberration with Wide Beam for Magnetic Immersed Lenses

作　　者：程敏[1] 唐天同[1] 

机构地区：[1]西安交通大学电子与信息工程学院,陕西西安710049

出　　处：《电子学报》2001年第6期811-813,共3页Acta Electronica Sinica

基　　金：国家自然科学基金!(No .6 99710 19)

摘　　要：本文采用宽束曲轴电子光学理论 ,研究了磁浸没透镜的电子光学特性 ,得出了主轨迹方程和曲近轴轨迹方程 ,并利用数学软件Mathematica推导出了其全部二级像差系数 .针对轴上磁场分布具有解析表达式的磁浸没透镜 ,文中还计算了它的曲轴二级像差 ,并给出了其孔径像差的弥散图形情况 。Electron optical properties of magnetic immersed lenses are studied using curved axes theory with wide beam. Principal trajectory equations and paraxial trajectory equations are obtained and all of second-order aberration coefficients are derived by Mathematica. The second-order curved axes aberration of a magnetic immersed lens which has analytic axial field distribution is calculated and a dispersion graph of aperture aberration is also given. It is shown that aberration characteristic of immersed magnetic lenses is very particular.

关 键 词：曲轴 磁浸没透镜 电子光学 像差 

分 类 号：TN16[电子电信—物理电子学]