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海洋微生物偏振光散射的双组分模型

, PP. 79-84

Keywords: 海洋微生物,粒径,偏振光,散射

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Abstract:

光学散射方法被广泛用于获取海洋微生物的形态和浓度信息。通过测量散射光的空间分布可以测量海洋微生物的形态和浓度;而最近发现,散射光的偏振特征却对细胞内部亚微米级散射颗粒更加敏感。把海洋微生物等效为粒径远大于入射波长的"米氏"粒子和远小于入射波长的"瑞利"粒子的混合体,以两种不同粒径的实心球作为微生物偏振光散射模型。利用蒙特卡洛模拟方法证明:散射光强的空间分布和偏振特征分别由米氏和瑞利散射成分决定。因此,测量散射光强分布只能获得微生物自身和其细胞核等"大"散射颗粒的粒径和浓度,而散射光偏振特征主要受到微生物内部亚微米细胞器等"小"散射颗粒的影响。

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