为评定激光指示器对运动目标的指示精度, 通常使用激光光斑测量系统, 测量照射在靶标上波长为1.064 μm的激光光斑位置。而现用激光光斑测量系统的最大探测距离仅为500 m, 需要大幅提高。本文通过分析制约激光光斑测量距离的因素, 研究了提高外场重频激光光斑测量距离的技术途径, 在选用可精确控制快门曝光的近红外高量子效率摄像机的基础上, 设计了快门最优控制策略。在保证激光光斑录取率99.9%的同时, 通过控制摄像机曝光时间, 将激光光斑图像信噪比提高了约2倍多。外场测量时, 对重频激光光斑的测量距离达到了2 000 m, 满足了对运动目标测量的精度要求。

To evaluate laser pointer’s localization accuracy of moving objects, a laser spot measurement system is typically used to measure the spot of a 1.064 μm-wave-length laser on the target. However, the maximum measuring distance of existing laser spot measurement systems is only 500 m, which needs to be substantially increased. This essay analyzes the constraints of laser spot distance measurement, studies the methods for increasing the measuring distance of repetitive-frequency laser spot in field, designs a shutter optimal control strategy based on the use of a high-quantum-efficiency near-infrared camera which is able to precisely control the shutter exposure. A 99.9% laser spot admission rate is guaranteed, meanwhile the laser spot image SNR is increased about 8 times by controlling the camera exposure time. In field, the measuring distance of frequency-repetitive laser spot reaches 2 000 m, which meets the precision requirements for moving target measurement.