水下激光探测系统的水体后向散射光计算与光学参数估计

针对水下激光探测系统的水体后向散射光的计算，给出了系统的光学几何结构，分析了不同距离处的激光光斑与接收视场区域的位置变化关系并进行了定量计算。依据光传输理论建立了水体后向散射光的计算模型，根据模型的算法步骤编写了计算机程序。结合水下激光探测系统的具体参数进行了实例计算，绘制了后向散射光信号波形，并与试验获取的信号波形对比分析，验证了算法的可行性和正确性。研究了使用实测后向散射光信号数据估计水体光学特性参数的方法，通过估算的参数重新绘制曲线并反向叠加在测量数据曲线上以抵消水体后向散射光对目标信号的影响从而能够提取目标信息。

Calculation of Water Backscattering Signal and Estimation of Optical Coefficient for Underwater Laser Detection System

To calculate the backscattering signal of water in structure of system is given and the relationship between laser an underwater laser detection system, the optical geometry spot and reception area is analyzed. By improving the existing arithmetic, the model of backscattering signal of water is built based on the optical transmission theory. The software is pro grammed according to the step of this model and an example is calculated using the real coefficient of laser detection system. The backscattering signal is drawn in graph and compared with the signal data obtained in experiment, which proves the cor- rectness o{ this model. Then the method of estimating optical coefficient by experiment data is studied and new backscatter- ing signal graph is drawn by the estimated value of optical coefficient. The new backscattering signal can be used to counter- act the influence of backscattering signal of water to the target and make it viable to extract information of target underwa- ter.