静电聚焦同心球系统的成像电子光学D章:最小弥散圆与最佳像面位置的确定  

Imaging Electron Optics of Electrostatic Focusing Concentric Spherical System Part D:Determination of Minimum Diffusing Circle and Optimal Image Position

作　　者：周立伟[1] Zhou Liwei(School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学光电学院,北京100081

出　　处：《光学学报》2022年第8期113-120,共8页Acta Optica Sinica

摘　　要：由所导出的阴极透镜中普遍成立的二级近轴横向色差即著名的Recknagel-Apцимович表示式出发,研究电子束形成的最小弥散圆以及最佳成像面的位置的确定,考察由物面原点发射的电子束在栅状阳极上形成的散射圆以及整个阴极面发射所形成的交叉颈,描绘由物面原点逸出的电子射束在成像段所形成的电子射线的包络。该研究有助于读者理解电子光学像管中电子行进的轨迹以及成像段的电子轨迹的发散与会聚。Start from the second-order paraxial lateral chromatic aberration of the cathode lens,that is,from the well-known Recknagel-Apцимовичformula in the imaging electron optical system,this paper investigates the minimum diffusing circle formed by the electron beam,studies the determination of the position of the optimal imaging plane,investigates the contour of crossover formed by the electron beam emitted from the whole photocathode surface,as well as the diffusion circle on the cathode surface formed by the electron beam emitted from the origin,and depicts the envelope of the electron rays formed in the imaging section.The present paper will help the readers to understand the moving electron trajectory in the image tubes,as well as its beam convergence and divergence in the imaging section.

关 键 词：成像系统 像管 成像电子光学 静电聚焦阴极透镜 电子束斑的焦散面 最小弥散圆与最佳成像面位置的确定 

分 类 号：O463[机械工程—光学工程]