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对复合镀金属微球的红外消光特性进行了数值计算,结果表明,当壳层厚度小于某一值时,对数正态分布下的双层壳复合微球,在最佳中径附近范围内时的质量消光系数大于单层壳微球,也大于由单层壳微球与双层壳复合微球的外层壳材料混合的微球;随着内壳h或外壳H的增加,上述粒径范围变窄,而随着波长λ的增加该范围变宽。微球的最佳中径等于波长的三分之一左右。
The infrared extinction characteristics of the composite metallized microspheres were numerically calculated. The results show that when the shell thickness is less than a certain value, the double-shell composite microspheres with log-normal distribution are in the vicinity of the optimal median diameter The mass extinction coefficient is larger than that of the single-shell microspheres and also larger than that of the single-shell microspheres mixed with the outer shell material of the double-shell composite microspheres; as the inner shell h or shell H increases, The range of the diameter is narrowed, and the range becomes wider as the wavelength λ is increased. The optimal microsphere diameter is equal to about one-third of the wavelength.