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Glossary terms about Electromagnetic lens

Electromagnetic lens
Electromagnetic lenses are made of coils of copper wire enclosed in an iron shell. The magnetic field generated when a current is passed through the coils can be used to focus a beam of electrons.


10 pages mention Electromagnetic lens

Acceleration voltage vs. specimen type
 
Detectors
See Principles of operation – electromagnetic lenses, apertures and beam size for more on SEM theory. 
Electromagnetic lenses, apertures and beam size
A series of electromagnetic lenses and apertures are used to reduce the diameter of the source of electrons and to place a small, focused beam of electrons (or spot) onto the specimen. 
Electron-matter interactions
 
High vacuum mode and pump system
 
Principles of SEM operation
electromagnetic lenses, apertures and beam size  
Role of sample height
 
Spot size
 
The electron gun
 
Troubleshooting: edge effect, charging, sample damage