This paper presents a method of measuring the particle mean size and dust concentration by small angle near forward light scattering optics and the extinction theory.
本文综合前向小角光散理论及消光原理，提出一种测量粉尘平均粒径及粉尘浓度的光学方法。
In clouds, there is a higher probability of light scattering forward.
在云中，有一种高概率的向前散射光线。这是叫散射的各向异性。
The intensity of forward-scattered light is measured by the forward-scattering visibility sensor, which determines the extinction coefficient of the air, then the visibility can be obtained.
前向散射能见度仪测量前向散射光强度，确定大气的消光系数，进而获得大气的能见度值。
Then the speckle field model was put forward for dynamic light scattering field.
提出了动态光散射场的散斑场模型。
Then the speckle field model was put forward for dynamic light scattering field.
提出了动态光散射场的散斑场模型。
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