Stigmator
Slightly defocused image of a foil hole in the TEM , astigmatic and corrected with stigmator
A stigmator is a component predominantly found in electron microscopes , which serves to eliminate the axial astigmatism of the electron lenses used. In principle, it is an electrostatic or magnetic cylinder lens , variable in strength and direction , which corrects the imaging errors caused by manufacturing errors or contamination .
The stigmator was described by Otto Scherzer in 1936 and made it possible for the first time to achieve better images with the electron microscope than with the light microscope .
literature
- J. Picht, J. Heydenreich: Introduction to electron microscopy. Berlin 1966.
- E. Ruska: The early development of electron lenses and electron microscopy. Hall 1979.
- D. Kay (Ed.): Techniques for Electron-Microscopy. Oxford 1967.
swell
- ↑ O. Scherzer: About some defects in electron lenses . In: Journal of Physics . tape 101 , no. 9-10 , September 1936, pp. 593-603 , doi : 10.1007 / BF01349606 . Quoted in: PW Hawkes: The long road to spherical aberration correction . In: Biology of the Cell . tape 93 , no. 432 , 2001, p. 439 ( PDF ). PDF ( Memento of the original from November 1, 2014 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
