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首先根据JONSWAP海面功率谱模型数值模拟出二维粗糙海面 ,采用几何光学近似与基尔霍夫 (Kirchhoff)标量近似计算了二维海面的光散射 ,计算中将每一面元看成一具有微粗糙度的粗糙面而不是近似地当作平面 ,并利用投影法与射线追踪法数值计算了一定入射角和散射角下的遮挡函数 ,有效地提高了海面光散射计算的精确性。最后利用太阳光的光谱辐照度数值模拟了海面的 3μm～ 5 μm红外散射图像 ,对于红外探测器抑制海面反射太阳光造成的亮带干扰具有一定的参考价值
First of all, based on the JONSWAP sea surface power spectrum model, the two-dimensional rough sea surface is numerically simulated. The light scattering of two-dimensional sea surface is calculated by using the geometrical optics approximation and Kirchhoff scalar approximation. Each facet is regarded as a micro-roughness Instead of approximately as a plane, and using the projection method and the ray tracing method to calculate the occlusion function under a certain angle of incidence and scattering angle, effectively improving the accuracy of the light scattering calculation of the sea surface. Finally, using the spectral irradiance of sunlight to simulate the 3μm ~ 5μm infrared scattering images of the sea surface, it is of certain reference value for the infrared detector to suppress the bright band interference caused by the sea surface reflected sunlight