用聚苯乙烯小球模拟生物组织中的光强分布

Photic intensity distribution simulations of biological tissues with polystyrene spheres

用水中周期排列的直径为 3μm的单层聚苯乙烯小球以及单个聚苯乙烯小球模拟对光敏感的生物组织 ,如绿色植物叶肉细胞、动物皮肤的表皮细胞、苍蝇蜜蜂等的复眼以及一种海蛇尾背部的光敏器官的光强分布 .通过观测聚苯乙烯小球在不同深度的光强分布 ,发现随着深度的改变其光强分布是截然不同的 .在小球的横截面上 ,光强分布不很均匀而且呈有规律的花纹图案 .在小球的外面 ,光强分布表现为独立的透镜成像分布 .周期排列的小球与单个小球在其横截面上的光强分布也完全不同 ,前者的光强分布表现出球与球之间很大的相关性 .

The photic intensity distributions of biological tissues which are sensitive to light such as mesophyll cell of green plant, epidermal cell of animal, compound eye of insect are simulated with single and periodically arrayed 3-mum-diameter polystyrene spheres in water. The results show that the photic intensity distributions are very different in different cross sections of spheres. Within the section of spheres, the photic intensity distributions pressent well-regulated pattern, which out of the sphere the distributions are similar to that of lens imaging. In addition, the difference of the distributions between single and periodically arrayed spheres in cross section is obvious. The distribution of the latter presents the correlativity of spheres.