为了保障航行器水下航行时对可见光波段光学隐蔽的需求, 以及实时测量其所在位置的光学隐蔽深度, 设计了小型化可见光波段的光学隐蔽深度测量系统。根据光学隐蔽深度模型, 优化设计了海水上行辐照度、海水下行辐照度、海水漫衰减系数、海水体衰减系数的测量方法。优化设计后的系统有21个测量通道, 测量光谱为390～667 nm, 工作深度可达50 m。进行了海上试验, 试验结果显示: 在天气良好的条件下, 水下航行器在520～560 nm可见光波段内存在暴露窗口, 同时测得特征长度为0.75 m的模型的光学隐蔽深度为3.5 m。得到的结果表明, 设计的小型化可见光波段光学隐蔽深度测量系统可以实现光学隐蔽深度的测量, 测量装置具有体积小、重量轻、系统性能稳定等优点, 适用于水下航行器搭载, 可为下一步实现可自主升降的光学隐蔽深度测量系统设计提供理论技术支撑。

To guarantee the demand of an underwater vehicle in sailing for the optical concealment in the visible light band and to measure the optical concealment depth of the underwater vehicle in real time, a miniature optical concealment depth measuring system for the visible light band was designed. Due to a model for optical concealment depth, the measuring methods for seawater upward irradiance, seawater downwelling irradiance, the diffuse attenuation coefficient of sea water, and sea water body attenuation coefficient were designed optimally. After optimization, the system has 21 measuring channels with the measurement spectral range from 390 nm to 667 nm, and working depth up to 50 m. A test on the sea was performed, and the test results show that there is an exposure window in the visible light range of 520-560 nm for the underwater vehicle under good weather conditions, meanwhile, the optical concealment depth of the underwater model with a feature length of 0.75 m is 3.5 m. The test results indicate that the miniaturization design of the optical concealment depth measuring system realizes the measurement of the optical concealment depth in the visible light band. The measuring device has advantages on small size and light weight and the system is stable for carrying on the underwater vehicle and provides theoretical and technical supports for the design of the optical concealment depth measuring system which can be independently lifted.