Abstract:In order to provide a theoretical basis for the research and detection of optical properties of ships. In order to establish the optical characteristic model of ship target. The ship surface is divided into a number of computable triangular microsurfaces by means of the microelement analysis method in the theoretical analysis and calculation of BRDF and the 3D MAX software.When calculating the scattering characteristics of each triangle minivan, choose a double distribution function for computing the Cook - Torrance model. By means of coordinate transformation, the sun-target-detector is unified into the planar coordinate system and the calculation is simplified by using the geometric visibility of the planar element.The influence of molecules, molecules and aerosol particles in the atmosphere on visible light scattering is analyzed when calculating the radiation intensity at the entrance pupil.Finally, the calculation formula of atmospheric pass rate and wavelength is obtained.By analyzing the radiance of each triangular microplane at the entrance pupil, the relation between the radiance and the wavelength is obtained.Finally, the model of ship target optical characteristics is established, and the atmospheric transmittance and radiation luminance at different wavelengths are calculated by simulation.
