激光光幕靶是弹丸测速的主要设备之一，针对阵列式点状激光靶的测速要求，研究了系统调试和测量过程中的影响因素。根据阵列式点状激光靶的测速原理，通过实验分析了负载电阻、光照距离、光照角度、发射角等因素对单路接收信号(负载电压)的影响；根据弹丸过靶时遮挡激光光束对光强变化情况，建立了相应的数学模型，并以此得到了不同压差下计时的相对误差，分析了光幕均匀性对整个测速系统的影响。理论建模和实验分析为阵列式点状激光靶的结构设计和在测速系统中的应用提供了理论依据和参考。

Laser-screen is one of the main equipments for measuring projectile-velocity, aiming at the test requirements of dot array laser-screen, the influences on the process of system debugging and measurement are studied. According to the principle of velocimetry, the influences of load resistance, illumination distance, illumination angle and angle of emission on received signals are analyzed. While the pellet passes through the device, the ideal mathematical model is established based on the actual situation of receiving component, and the relative error under different dropout voltages of timing is obtained to analyze the influence of the uniformity of the screen on the whole velocity-measuring system. The theoretical modeling and experimental analysis provide the theoretical basis and reference, for the structure design and the application of dot array laser-screen in the velocity-measuring system.