Patent ID: 8901493

Claim:
An electron microscope, comprising: an electron beam irradiation device for irradiating a sample with an electron beam emitted from an electron beam source; an electron energy loss spectrometer for analyzing energy of an electron beam made of inelastic scattering electrons transmitted through the sample; and a control device for controlling the electron beam irradiation device and the electron energy loss spectrometer and obtaining an image relating to the sample, wherein the control device is configured to: control the electron beam irradiation device so that one irradiation position on the sample is irradiated with the electron beam for a predetermined irradiation time; divide the predetermined irradiation time into a plurality of time intervals; obtain electron energy loss spectra for a plurality of different energy ranges within the predetermined irradiation time, wherein one electron energy loss spectrum is obtained for each of the plurality of time intervals, and the energy range for an electron energy loss spectrum for a first one of the time intervals is different from an energy range for an electron energy spectrum for another one of the time intervals that is time adjacent to the first one of the time intervals; for each energy range, integrate the electron energy loss spectra obtained during the predetermined irradiation time for the respective energy range; and connect each of the integrated electron energy loss spectra using an energy range as a transverse axis to generate a connected electron energy loss spectrum.