Research on Fresnel Circular Aperture Diffraction

Fresnel circular aperture diffraction is an important content in optics. At present, the intensity of light distribution on the axis of diffraction covergent light wave after the diffraction from monochromatic divergent spot to small aperture is often discussed. At the same time, the methods of half-wave hand and vector graph are also discussed. From Huygens-Fresnel pronciple, this paper will derive the diffraction law about convergent diffraction light wave and divergent diffraction light spherical wave and monochromatic covergent spherical wave into a small circular aperture diffraction. From the research, some important results are achieved.