为了增强激光监听系统对大气环境的适应性, 在大气信道二次调制模型的基础上对光轴检测模型展开了研究。首先从四象限(4QD)光轴检测系统的角度推导大气环境下光轴检测系统中的固有分辨精度与细分精度之间的关系;然后通过分析该系统在大气环境下所受的约束条件, 指出在激光监听系统中, 4QD探测系统更具有优越性;最后通过一个设计实例与监听试验验证了上述观点。

To enhance adaptability of the laser eavesdropping system to the atmospheric environment, the model of optical axis detection was studied on the basis of the secondary modulation model of atmospheric channel. Firstly, from four quadrant detector (4QD) axis detection system, the conversion relations of natural resolution and division precision were deduced. Then, by analyzing the constraints of the 4QD axis detection system in atmospheric environments, it is indicated that 4QD detection system is more advantageous and its superiority is proven by design examples and tests.