Scanning Electron Microscope
How an SEM Works
This simulation illustrates the working of the entire SEM. The various parts shown in this video are the electron source, the column, the sample chamber (or the vacuum chamber) the detectors and software which puts the image together. All these parts work in harmony to produce an SEM image of your sample.
How the Electron Source Works
This video below shows how the source produces electrons for scanning the sample. In a typical SEM, the electron beam is emitted thermionically from the source.
How the Secondary Electron Detector Works
This video below shows the positioning and the operation on a secondary electron detector in the SEM chamber.
How the Backscattered Electron Detector Works
This video below shows the positioning and the working of a backscatter electron detector in the SEM chamber.
How A Sample is Scanned in the SEM
This video below shows how the sample is rastered with the electron beam coming from the SEM column to produce an image of the sample.