应用于两栖车辆平台的无线光通信系统通信距离短,具有体积小、功耗低,不使用稳定伺服系统的要求。首先分析近红外光在海平面上传输的主要衰减,并在此基础上建立链路光功率几何衰减模型,推导出在特定条件下,接收光功率与接收光轴偏离发射光轴距离、倾斜角以及光源发散角的关系。最后,应用MATLAB进行了仿真计算,得出光通信距离为100m、300m和500m的最优发散角分别为24°、8°和5°,即此发散角下接收光学系统的光功率为阈值时,可偏离光轴距离达到最大。 The wireless optical communication system used in the amphibious vehicle platform has short communication distance and small size, low power consumption and does not require the use of a stable servo system. First of all, the main attenuation of near-infrared light transmission at sea level is analyzed. Based on this, the geometric attenuation model of link optical power is established. Under certain conditions, the distance between the receiving optical power and the receiving optical axis and the optical axis of the receiving optical axis, As well as the light source divergence angle. Finally, the simulation calculation using MATLAB shows that the optimal divergence angles of the optical communication distance of 100m, 300m and 500m are respectively 24 °, 8 ° and 5 °, that is, when the optical power of the receiving optical system under the divergence angle is a threshold value, The distance from the optical axis can reach the maximum.