Abstract: The symmetrical transformation of the Fraunhofer diffraction for two-dimensional aperture is discussed by using superposition of the complex amplitude. For apertures with certain shape, symmetrical transformation of the Fraunhofer diffraction amplitude is introduced to derive the intensity distributions of diffraction from known results. The intensity distributions of diffraction patterns are also simulated by using Mathematica soft.

Key words: Fraunhofer diffraction, symmetrical transformation, intensity distribution