Transmission electron microscope

The first electron microscope was developed by Knoll and Ruska in 1930s. It was a transmission electron microscope; the electrons were focused on a thin specimen and the electrons transmitted through the specimen were detected. Figure 18.5 shows a simplified optical diagram comparing a light microscope with a transmission electron microscope.

 

Figure 18.5 A simplified comparison of optics in a light microscope with that in a TEM.