烟幕对激光束传输特性的影响研究

发布时间：2018-06-05 13:25

本文选题：激光传输 + Mie　；参考：《长春理工大学》2015年硕士论文

【摘要】：伴随科学技术的进步,激光技术大量地被用在包括重工业、农业、医疗、通信等在内的各个重要领域。当介质不均匀时,激光通过介质会发生衰减,反映在实际应用的情况中,自然形成或人为造成的烟幕等均会对其传输效果会造成不同程度地影响。所以,研究激光通过这类介质时的传输特性长久以来一直是中外科研工作者研究、探讨的共同课题。本论文是针对激光在烟幕中的传输这一课题,首先基于Mie散射理论对铜粉粒子和石墨粒子的散射特性进行了理论模拟分析,将烟幕粒子对激光传输过程中地衰减分为散射、吸收作用,同时运用朗伯-比尔定律对波长分别为355nm、532nm、650nm、830nm、980nm、1064nm的激光在超细铜粉烟幕以及石墨烟幕中传输时的透过率进行理论模拟分析。其次,在室内实验条件下,运用超细球形铜粉、石墨粉制造烟幕,对波长为532nm、650nm、980nm的激光的透过率进行实验分析,同时在对实验数据进行分析、研究的基础上与理论的计算结果进行对比、分析,为激光在烟幕中传输的广泛实际应用的研究打下坚实的理论与实验基础。
[Abstract]:With the development of science and technology, laser technology is widely used in many important fields, such as heavy industry, agriculture, medical treatment, communication and so on. When the medium is not uniform, the laser will attenuate through the medium, which is reflected in the actual application, the natural formation or man-made smoke screen will affect the transmission effect to varying degrees. Therefore, the study of the transmission characteristics of laser passing through this kind of medium has long been a common topic for both Chinese and foreign researchers. In this paper, aiming at the topic of laser transmission in smoke screen, the scattering characteristics of copper and graphite particles are analyzed theoretically based on Mie scattering theory, and the ground attenuation of smoke particles during laser transmission is divided into scattering. At the same time, by using Lambert-Beer 's law, the transmittance of the laser with wavelength of 355nmnmP532nmO650nmO830nm ~ 980nm ~ (1064nm) in the smoke screen of ultrafine copper powder and graphite screen is simulated and analyzed by using the theoretical analysis of the transmittance of the laser in the smoke screen of ultrafine copper powder and graphite screen. Secondly, the smoke screen was manufactured by using ultrafine spherical copper powder and graphite powder under the laboratory experimental conditions. The transmittance of the laser at wavelength of 532 nm was analyzed experimentally, and the experimental data were analyzed at the same time. On the basis of this study, the theoretical results are compared and analyzed, which lays a solid theoretical and experimental foundation for the study of the wide practical applications of laser transmission in smoke screens.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN24

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