%0 Journal Article
%T THE ELECTRON OPTICAL PROPERTIES AND ABERRATION THEORY OF A COMBINED MAGNETIC ROUND LENS AND DEFLECTION SYSTEM<br>磁透镜与偏转器的复合系统的电子光学性质和象差理论
%A XIMEN JI-YE
%A <br>西门纪业
%J 物理学报
%D 1977
%I 
%X A combined magnetic round lens and deflection system with a superimposed field has been studied, and the power series expressions for the magnetic field is given. The electron trajectories are described in vector-form, and the Gaussian optical properties of the combined system discussed. By means of Fermat's principle general aberration formulae for the combined system have been derived. Equations for calculating the third-order aberration are given in compact matrix-form, hence they are suitable for numerical computation. This paper attempts to give a general theory of the combined system to provide guidance for designers of cathode ray tubes and electron optical instruments.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=B0337CDE4D507A0688B395355CF7BD93&yid=D3A55680A8B4A1DC&vid=96C778EE049EE47D&iid=CA4FD0336C81A37A&sid=339D79302DF62549&eid=8E6AB9C3EBAAE921&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0