中国科学院北京科学仪器研制中心,北京,100080
纸质出版:1993
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[1]汪滨.从解析角度试论SEM分辨率[J].电子学报,1993(09):82-86.
Wang Bin. Analytical Discussion of the Resolution of Scanning Electron Microscope[J]. Acta Electronica Sinica, 1993, (9): 82-86.
对于一个电子光学系统我们在考虑了各静电透镜和电磁透镜的球差、色差、衍射和高斯像斑之后。用解析的方法求出了上靶束径的条件极值
得到了最佳放大倍数和最佳孔径角的解析表达式
反过来这为完善该系统的设计提供了依据与途径。还证明了d作为a和M的函数在无条件限制下不存在最佳值。
A probe diameter (d) is the function of aperture angle (a) and magnification (M)
taking into account of a Gaussian probe
spherical
chromatic and diffraction aberrations of all lenses in a sysfem.With analytics
an equation for optimum α1 is derived to obtain the minimum probe diameter
when one of the two variables has been regarded as a constant We have also proved that d as a function of M and a has no extreme value if there is no any additional condition.
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