Abstract
Imaging properties of scanning confocal electron microscopy (SCEM) were studied by calculating simple model systems using the multislice method. A simple geometrical explanation was given, particularly for the difference between bright field (BF) and annular dark field (ADF) SCEM. It is demonstrated that the BF-SCEM image contrast consists of two features. One gradually changes over a wide defocus range and depends on the lateral size of the object. Another appears only near the focus and is independent of sample size. On the contrary, ADF-SCEM image contrast does not depend on the lateral size of the object. Therefore, the ADF-SCEM will provide more readily interpretable image contrast.
Original language | English |
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Pages (from-to) | 20-26 |
Number of pages | 7 |
Journal | Ultramicroscopy |
Volume | 111 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2010 Dec |
Externally published | Yes |
Keywords
- 3D STEM
- Confocal STEM
- Confocal electron microscopy
- Image simulation
- Multislice method
- Optical sectioning
- SCEM
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Instrumentation