Could someone explain in a short and simple way the basic operation

[asdf1]

Could someone explain in a short and simple way the basic operation principle of a TEM?

 

[Astronuc]

Here is a reasonably good overview of TEM and some sites which provide additional basics and some applications.

Transmission electron microscopy (TEM) is an imaging technique whereby a beam of electrons is focused onto a specimen causing an enlarged version to appear on a fluorescent screen or layer of photographic film (see electron microscope), or can be detected by a CCD camera. The first practical transmission electron microscope was built by Albert Prebus and James Hillier at the University of Toronto in 1938 using concepts developed earlier by Max Knoll and Ernst Ruska.

Wikipedia, more at - http://en.wikipedia.org/wiki/Transmission_electron_microscope

http://nsm1.fullerton.edu/~skarl/EM/Microscopy/TEMMicroscopy.html

http://www.matter.org.uk/tem/default.htm

http://www.uq.edu.au/nanoworld/tem_gen.html

http://www.bnl.gov/tem/

http://www.mwrn.com/guide/electron_microscopy/microscope.htm

 

[asdf1]

thanks! :)