Light scattering model and angular spectrum of scattering intensity in fogs

Scattering of the atmosphere particles such as fogs is one of the important factors which limit the precision of laser control and guide. Based on Mie's theory,the scattering efficiency factor of a spherical particle is analyzed, the scattering coefficient of spherical particles 1~6 μm in radius is presented. According to Bouguer's theory the expression of the scattering intensity of particles is obtained. Then in the field of view of the receiver, the distribution of scattering intensity is simulated. The simulation results show that, in the orientation of propagation, the scattering intensity exhibits undulation, and approaching the axial orientation, the scattering intensity tends to decrease．