离散泡沫的光学衰减原理研究

为研究泡沫的光学干扰原理，基于几何光学原理和电磁波传输理论，对离散泡沫的光线折射及吸收等现象进行了分析，从光线传播方向和透射能量变化的角度研究了泡沫对光线的衰减，建立了衰减模型。通过计算和红外光谱及热成像试验，发现：泡沫结构和泡沫材料是造成光线强烈衰减的重要原因。结果显示：泡沫溶液的溶质/溶剂的消光能力、浓度等对特定波段光波的吸收产生关键影响；泡沫通过改变光线的传播方向，大大分散出射光线的能量密度；随着光线穿过泡沫液膜界面的次数增多，透射光强迅速衰减，透射能量迅速下降；其漂浮运动还将导致出射光线方向和能量密度分布的不确定性。

Investigation on optical attenuation of discrete bubbles

Bubble is a novel medium for potential broadband passive optoelectronic countermeasures. To investigate the principle of its attenuation,geometrical optics theory and electromagnetic wave theory were used to study the phenomenon of light refraction and absorption of discrete bubbles. The change of the propagation direction and the transmission energy were analyzed,and the model was established. It is found that the structures and materials of bubbles play an important role in attenuating light according to the calculation and infrared spectrograms as well as the thermal imaging test. It indicates that the extinction capability and concentration of bubble solvent can seriously influence the light absorption in some wavebands,bubbles can change the direction of light propagation and reduce the energy density,the transmission intensity and light energy decrease rapidly with the increase of times that the light passes through the bubbles,and bubbles' floating nature can cause the uncertainty in the emergent ray direction and energy distribution.