Patent ID: 8436301

Claim:
A transmission electron microscope having: an electron gun for emitting an electron beam at a sample; a set of condenser lenses for focusing the electron beam emitted from the electron gun; a set of imaging lenses for imaging the electron beam transmitted through the sample; and an electron spectrometer for spectrally dispersing the electron beam according to an amount of energy possessed by the electron beam transmitted through the sample; wherein said electron spectrometer is an electron spectrometer that outputs a spectral image which is different in focal position between a direction of energy dispersion and a direction perpendicular to the direction of energy dispersion; wherein said transmission electron microscope comprises: an accelerating voltage varying device for varying an accelerating voltage of the electron beam, an aperture for limiting a region through which the electron beam passes, a two-dimensional detector for detecting a transmission electron microscope image or the spectral image, an image display device for displaying the spectral image, and a correcting device for measuring and correcting distortion in the spectral image; wherein the two-dimensional detector is constructed to detect the electron beam transmitted through the aperture at various set values for the accelerating voltage of the transmission electron microscope, an electron beam position image being formed based thereon; and wherein the correction device is constructed to calculate electron beam positions from said electron beam position image and to correct the spectral image of the sample based on deviations between each of the calculated electron beam positions and a corresponding reference electron beam position.