electron microscopy
 

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Image Modes in TEM - Principles of Image Formation

TEM |Bright Field Images | Dark Field Images | Lattice Images (HRTEM) |Mathematics

 
 
Simplified representation of the ray path leading to the first intermediate image in the image plane of the objective lens. Electrons, which come from the condenser system of the TEM, are scattered by the sample, situated in the object plane of the objective lens. Electrons scattered in the same direction are focused in the back focal plane, and, as a result, a diffraction pattern is formed there. Electrons coming from the same point of the object are focused in the image plane. In the TEM, the first intermediate image is magnified by further lenses (projective system).
   
ETH Zürich | ETH chemistry department | ETH inorganic chemistry

modified: 6 February, 2015 by F. Krumeich | © ETH Zürich and the authors