Study On Jamming Mechanism Of Interference Materials With One-Way Transparency

During the past several years,the novel materials,producing a one-way transparent smoke,have attracted more attention.In this dissertation,a research has been made on the interference mechanism of one-way transparent smoke cloud.It aims to achieve a good transparency when smoke agents are used in battlefield.Firstly,based on the different scattering speciality of different materials at same wavelength,the feasibility of one-way transparent smoke has been analyzed,interference mechanism of the one-way transparent smoke cloud has been studied,materials with good infrared transmission and scattering properties has been chosen.Secondly,an smoke agent composition which can stable combustion with a mount of non-combustion powerful additives and disperse the additives in the smoke cloud evenly has been design by using orthogonal experiment scheme.The surface preparation has been made on non-combustion media by using nitrocellulose to improve the performance of combustion dispersion,then its internal structure is analyzed by SEM.Thirdly,the transmittance of smoke screen has been detected by using OPAG 33 Fourier transform infrared spectrometer telemetry,which are placed in different positions.The experimental results show that X can be used as one-way transparent in the infrared spectrum material at long-range.When the distance between smoke cloud and detector is changed,transmittance spectra changes regularly.The particles of X have good scattering properties,its scattering characteristics are related with size and shape of particles.Finally.through combining with the classical Mie scattering theory,using improved Matlab algorithm to analyze single spherical particle,It can be concluded that the forward scattering of particles is stronger than backward scattering.According to the knowledge of geometric optics,it is deduced that the attenuation of energy through the smoke is inversely proportional to the square of the distance.It explains the phenomenon that the transmittance changes with the change of the smoke cloud location on the light road.Then a suitable interference light source can be design.It can achieve the one-way transparent smoke theoretically.