Authentication by the study of the structure of the materials present in the object

Techniques allowing a magnification and a best resolution of the surface :

Electron microscopy

a. Principle :

device similar to the optical microscope but where the light rays are replaced by an incident electron flux. The reflected electrons provide an image of the surface of the object or the sample. The shades of grey of the picture are directly related to the atomic weight of the present materials

b. Applications :

multiple

c. Advantages :

• possibility of examining an extremely tenuous particle
• no problem of field shallowness
• very important magnifying power