Figure 7. Acquisition and reconstruction of an electron hologram.

(a) Set-up of Electron Holography in TEM. (b) Hologram of a 100 nm thick Fe₆₀Al₄₀ thin film grown on SiO₂ substrate and covered with glue for TEM sample preparation. (c) Fourier spectrum of the hologram showing two sidebands and one center band. Fourier transform of the upper sideband low-pass filtered by a numerical aperture yields the image wave represented by the phase, (d) and amplitude image (e).