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本文由电磁聚焦曲近轴方程出发,导出了电磁聚焦同心球系统的近轴轨迹的表达式,讨论了系统的聚焦性质与电子光学色球差,探讨了由电磁聚焦同心球系统向具有均匀平行的电场和磁场的电磁聚焦系统,静电聚焦同心球系统和近贴聚焦系统过渡的三种特殊情况,最后研究了加上栅网电极的三电极同心球静电聚焦系统和均匀平行的电场和磁场的三电极电磁聚焦系统的电子光学。
Based on the paraxial equation of electromagnetic focusing quasi-crank, the expression of the paraxial trajectory of the electromagnetic focusing concentric spherical system is deduced. The focusing property of the system and the electronic optical chromospheric difference are discussed. The electromagnetic focusing co- The electromagnetic focusing system of the electric field and the magnetic field, the electrostatic focusing concentric spherical system and the near-focusing focusing system are studied. Finally, the three-electrode concentric spherical electrostatic focusing system with grid electrodes and the uniform parallel electric field and magnetic field Electrode optics of three-electrode electromagnetic focusing system.