Lidar Random Distribution Of The Theoretical Study Of The Body Target Scattering Characteristics

Laser radar has extensive applications in the commercial and military fields. The study on light scattering from randomly targets for laser radar has acquired more attention during the years. The Gaussian wave scattering from randomly rough surfaces is investigated theoretically in this thesis.The potential applications and state of the art of the research on light scattering from rough surfaces are introduced briefly. In light of expansion of the plane wave spectrum and Kirchhoff approximation, the integral expressions for the Gaussian wave scattering from randomly rough surfaces, and the integral equations for coherent and incoherent scattering cross-sections are deduced on the basis of far field approximation and stationary phase method. The scattering field from randomly rough aluminum spheres and oil-painted spheres, and the coherent scattering and incoherent scattering cross-sections are simulated numerically at wavelength of 1. 06μm.The effect of the beam radius of the incident Gaussian wave, polarization and the surface roughness on the scattering field, coherent and incoherent scattering cross-sections are analyzed theoretically.