一种新型水下激光成像系统

提出了一种新型水下激光成像系统的模型 ,计算了该系统的成像距离和成像质量与光束发散角、接收视场角、快门开启时间等主要参数的关系 ,降低背景光的影响与提高光脉冲质量能有效地提高成像距离和成像质量。在一般海水介质中 ,这种水下激光成像系统的成像距离理论值可达2 5倍衰减长度 ,约是同步扫描和距离选通水下激光成像系统的 4～ 5倍。

A New Kind of Underwater Laser Imaging System

The model for a new kind of underwater laser imaging system is proposed. The quantity relationships of imaging distance and quality of the system with the main system parameters such as the scattering angle of light beam, the visual angle and open time of gate of receiver are calculated. The results show that the imaging quality and distance can be increased by decreasing the influence of background lights and increasing the quality of pulse light. The theoretical value of imaging distance for the new kind of underwater laser imaging system in the ordinary seawater can reached 25 times of the attenuation lengths, which is as 4~5 times long as that for the synchronous scanning and range gated systems.