Abstract

Calculation results are presented which show how optical radiation energy is redistributed and the law of conservation of energy is fulfilled when radiation is reflected from a specular surface in a turbulent atmosphere. We have ascertained that if spatially limited light beams are formed due to reflection, then the energy is redistributed in a plane transversal to the light propagation direction near the strictly backward direction within a limited region no larger than several Fresnel zones. In the case of a point reflector, where a spatially unlimited reflected wave is generated, the energy redistribution occurs on a much larger scale. An increase in the mean intensity of a reflected wave within a limited region with a diameter of two Fresnel zones around the strictly backward propagation direction (backscatter enhancement effect) occurs due to the outflow of reflected wave energy in lateral directions from a huge domain, which is several orders of magnitude larger than the area where this energy is accumulated.

中文翻译：

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在湍流大气中反射时光辐射能量的重新分布

摘要

计算结果显示了当辐射在湍流大气中从镜面表面反射时，光辐射能量如何重新分配以及满足能量守恒定律。我们已经确定，如果由于反射而形成空间有限的光束，则能量会在不大于几个菲涅耳区的有限区域内，在严格向后方向附近的横向于光传播方向的平面中重新分布。在点反射器的情况下，会产生空间上无限的反射波，能量重新分布会在更大的范围内发生。在严格向后传播方向周围直径为两个菲涅尔区的有限区域内，反射波的平均强度增加（后向散射增强效应），这是由于反射波能量从巨大的域横向流出，从而导致反射波的平均强度增加。比能量积累的区域大几个数量级。