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根据成像系统光学传递函数的相乘率,用刻有不同空间频率光栅的目标板,研究了在有水体和无水体情况下,光栅图像的传输情况。然后运用mathcad2001软件对采集到的光栅图像进行分析和计算,获得海水的光学传递函数。通过人为地改变水体长度、水中悬浮物质浓度和水体含盐量等,定性地研究了影响海水光学传递函数的因素。该测量方法在激光水下成像、水下目标探测以及对潜激光通信都将具有重要的推广应用价值。
According to the multiplication ratio of the optical transfer function of the imaging system, the transmission of the raster images in the presence of water and without water was studied using a target plate engraved with different spatial frequency gratings. Then use mathcad2001 software to analyze and calculate the collected raster images to obtain the optical transfer function of seawater. By artificially changing the length of the water, the concentration of suspended solids in the water and the salinity of the water body, the factors influencing the optical transfer function of the seawater are qualitatively studied. The measurement method will have important application value in laser underwater imaging, underwater target detection and submarine laser communication.