Electron holography
Electron holography is a method of electron microscopy with which extremely high resolutions can be achieved.
Working method
In electron holography, the electron beam is split into two partial beams with an electric biprism . A partial beam penetrates the examination object, the other partial beam continues undisturbed. The two partial beams combine on the screen to form an interference pattern , the electron hologram . This contains all information of the electron wave. With the help of a computer, the amplitude and phase can be reconstructed and the complex image wave is obtained. This can be displayed as a phase image or an amplitude image.
High resolution
The method can be used for high-resolution transmission electron microscopy . For this purpose, the image errors caused by the magnetic lenses are calculated out numerically.
literature
- Eduard Heindl : Use of neural networks in electron holography . Dissertation. Eberhard Karls University, Tübingen 2001. ( online , PDF, 3.62 MB)