Bilder: Fresnel and Fraunhofer diffraction am Spalt

Fresnel diffraction am Spalt: L=20, F=10

 Fresnel diffraction am Spalt:    L=20,   F=10

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

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

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

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

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

 Fraunhofer diffraction am Spalt:    L=5000,   F=0.04
Vergleich der Fresnelbeugung (grün) mit der Fraunhoferbeugung (violett)