Bilder: Fresnel and Fraunhofer diffraction am Spalt
Fresnel diffraction am Spalt: L=20, F=10

Fresnel diffraction am Spalt: L=50, F=4

Fresnel diffraction am Spalt: L=800, F=0.25 ~der “Poisson Fleck” Effekt

Fraunhofer diffraction am Spalt: L=5000, F=0.04
