Artificial Fog And Fog Parameters Of Laser Radiation Characteristics Of Inversion

The article is composed of six parts. In the first part, the research progress of optics of the atmosphere is introduced and the significant of laser radiation was given. In the second part, the theory of laser radiation transmission and the phenomena that can be met were introduced in detail. In the third part, transmission intensity in vertical polarized incident light under different artificial fog concentration was measured. According to the experimental data, changes of relative vertical and parallel transmission intensity were analyzed. The results show that parallel transmission intensity approximately presents exponential distribution while vertical transmission intensity goes up then goes down. Using the degree of depolarization, figure of the fog-droplet were discussed, and it can be seen as spherical in the lighter fog. In the fourth part, the transmission situation of a ballistic light in fog is analyzed. Its intensity reduction and traveling distance limitation are discussed. Based on the theory of polarization, by changing the length of laser transmission, single and multiple attenuation coefficients were calculated. In the fifth part, the relative transmittance as function of time for an impulse incidence are presented by Monte-Carlo method to trace the path of the ray incident upon dense fog media. The results may provide theoretical basic for distinguishing the ballistic light from high noisy-light. And the effect of different scattering coefficients and asymmetry factor on transmission light was discussed. Based on Monte-Carlo theory, scattering coefficients were calculated by using of iterative method. And the corresponding concentration and the mean size of droplet were accounted. In the sixth part, we summarized our research and put up with shortages of this article.