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本文研究了对数正态分布下壳—核型微球的消光 ,数值计算了镀金属微球在红外波段的质量消光系数 ,比较了壳—核型单分散微球与对数正态分布下多分散微球的质量消光系数的异同。结果表明 :当波长较短时 ,有较大质量消光系数的粒径范围较窄 ;随波长增加 ,最大质量消光系数减小 ,相应的最佳粒径增大 ;在一定粒径范围内 ,单分散粒子的质量消光系数比对数正态分布下多分散粒子的大 ,波长越短 ,此范围越小 ;在相同波长、镀覆厚度下 ,镀铝微球的消光最佳 ,镀铜的比镀银的好
In this paper, the extinction of shell-karyon microspheres under log-normal distribution is studied. The mass extinction coefficient of metallized microspheres in the infrared band is numerically calculated. Compared with the lognormal distribution of shell-core monodisperse microspheres Similarities and differences of mass extinction coefficient of polydisperse microspheres. The results show that when the wavelength is short, the range of particle size with larger mass extinction coefficient is narrower. With the increase of wavelength, the maximum mass extinction coefficient decreases and the corresponding optimum particle size increases. Within a certain particle size range, The extinction coefficient of dispersed particles is larger than that of polydisperse particles under logarithmic normal distribution, and the shorter the wavelength, the smaller the range. At the same wavelength and plating thickness, the extinction of aluminized microspheres is the best, and the ratio of copper plating Good silver plating