北京大学学报(自然科学版)

钟形磁场的正则色差理论

西门纪业, 刘志雄   

  1. 北京大学电子学系,北京,100871
  • 收稿日期:1997-11-10 出版日期:1998-04-20 发布日期:1998-04-20

Canonical Theory of Chromatic Aberration in Glaser's Bell-shaped Magnetic Lens

XIMEN Jiye, LIU Zhixiong   

  1. Department of Electronics, Peking University, Beijing, 100871
  • Received:1997-11-10 Online:1998-04-20 Published:1998-04-20

摘要: 根据正则电子光学理论,本文将光程函数广义积分变换方法应用于钟形磁场,推导出一级和三级色差解析公式,然后进行了数值计算。这项研究成果发展了电子光学Scherzer原理,有助于估计磁透镜的一级和三级色差。

关键词: 电子光学, 正则理论, 磁透镜, 几何像差, 色差

Abstract: A powerful technique of integration transformation on eikonals has been applied to Glaser's bell-shaped magnetic lens. Consequently, first-and third-order chromatic aberrations have been analytically derived and numerically calculated. This theoretical research may be helpful for estimating first-and third-order chromatic aberrations in rotationally symmetric magnetic lenses.

Key words: electron optics, canonical theory, magnetic lens, geometrical aberrations, chromatic aberrations

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