Mr. Shuai Liu Profile

Shuai Liu

at Xidian Univ

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Proceedings Article | 2 December 2020 Paper

Multiple laser scattering of dust haze in low visibility

Shuai Liu, Ziyun Ma, Yiping Han, Zhensen Wu, Qiang Xu

Proceedings Volume 11717, 117171Z (2020) https://doi.org/10.1117/12.2587163

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In this article, the scattering transmission of laser beam in the dust haze with low visibility is studied, which provides a reference for the laser beam experiment under the condition of air conditions with dust haze. According to the gamma distribution of particle size of sand dust particles, the attenuation of laser beam at different wavelengths of sand dust particles with different water content is studied by using The Discrete Dipole Approximation (DDA) and Rayleigh approximation equivalent method of equal volume sphere. The results show that the greater the water content, the greater the attenuation of laser beam; the comparative calculation of dust particles and haze main components at different wavelengths. The results show that the absorption factor of dust particles is larger than that of other haze components except carbon sol, while the scattering factor is slightly smaller than that of haze components. Considering the different proportions of dust haze components and visibility, Monte Carlo method is used to study the transmission transmittance and reflectivity of dust particles in dust haze. The attenuation characteristics of the laser beam caused by the dust haze particles in the state of coated water layer and the dust haze particles in waterless coating condition layer are calculated. Through the research and calculation of this paper, we can clearly and intuitively see the attenuation characteristics of laser beam caused by dust haze. Therefore, it is very necessary to study the attenuation of laser beam caused by dust haze.

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