Summary

A simple sketch of a Transmission Electron Microscope (TEM) and Scanning Electron Microscope (SEM) compared to an optical transmission microscope and a cathode ray tube (CRT) TV screen - both systems have many things on common with the electron microscope. The optical microscope uses lenses to control the lights pathway through the system and is in many ways built up like a TEM - only the TEM uses electromagnetic lenses to direct the beam of electrons. The CRT uses electromagnetic lenses as the TEM and SEM to control the electron beam, and generates an image for the viewer by scanning the beam over a fluorescent screen - in the same way the a SEM generates an image by scanning the electron beam over a small sample.

• This illustration was made for the Opensource Handbook of Nanoscience and Nanotechnology

• Please acknowledge the Opensource Handbook of Nanoscience and Nanotechnology if you use this illustration!

• The image also appears on the Commons/nanotechnology page

• Illustration by Kristian Molhave and released for free use provided you acknowledge using it from the Opensource Handbook of Nanoscience and Nanotechnology.

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