New method for determination of diffraction light pattern of the arbitrary surface

In this paper, the methodology for finding a solution in case of diffraction problem on arbitrary objects which are at an arbitrary distance from the screen is presented. The method is based on numerical solving of the Fresnel-Kirchhoff integral by means of discretization of an obstacle and the screen on which the diffraction pattern is observed. This method can be applied for arbitrary shapes of slits for which the equation of the surface is known as well as for an arbitrary positioned screen, located even very close to the object. The developed method is employed to determine the diffraction pattern for obstacles for which the pattern is already known from the theory. Good agreement was found.