Because of the small objective distance in the in-column energy filter, the diffraction pattern was usually accompanied by the zero-loss peak. Whatever the sample thickness is, the plural scattering effect must be removed from the EELS spectra obtained by in-column energy filter. 由于Ω型能量过滤器的物距较小,在零峰附近常伴随有衍射点,所以无论样品厚度如何,由Ω型能量过滤器采集的电子能量损失谱必须扣除多重散射的影响。