By establishing mathematical model between atmospheric visibility and transmission medium parameters

atmospheric visibility is characterized by optical thickness

and influence of atmospheric visibility on polarization characteristics of transmission light is analyzed. The Monte Carlo method is used to simulate the variation of polarization information of scattered light at different optical thicknesses

and simulate several atmospheric visibility environment in polarization optical simulation experiment module. Contrastive analysis on simulation experiments and experimental data

influence of atmospheric visibility on polarization characteristics of light is studied. The results show that polarization of polarized light decreases with decrease of atmospheric visibility

that is

the increase of optical thickness

the polarization degree is depolarized

characteristics of polarization angle distribution is gradually blurred

the overall contour is diffused outward

the mean value of the polarization decreases

with further reducing of visibility number of particles scattered are gradually saturated

degree of decline in degree of polarization gradually slow down.