Calculating Diffraction Patterns of Crosshairs at Different Distances

During experimental investigations, we need to calculate diffraction patterns of crosshairs at different propagation distances. To achieve this objective, we utilize Gaussian beam illumination as the incident light source. This implementation typically involves numerical propagation algorithms such as the angular spectrum method or Fresnel diffraction integrals, where the complex field of the Gaussian beam is computationally propagated through free space. By simulating diffraction patterns at various distances, we can observe the evolution of crosshair structures and draw relevant conclusions about beam transformation. The simulation approach may include Fourier transform operations for wave propagation calculation and intensity profile extraction for visualization. This experimental framework enables deeper understanding of diffraction phenomena and facilitates comprehensive research into fundamental properties of light propagation. The code implementation would typically involve parameters for beam waist size, wavelength specification, and distance sampling intervals to ensure physical accuracy.