Fig. 1. The structure of a single beam expanding beam scanning laser periscope detection system.单光束扩束扫描激光周视探测系统结构

Fig. 2. Schematic diagram of detection target of single-beam pulsed laser circumferential scan detection system.单光束脉冲激光周向扫描探测系统探测目标示意图^[11]

Fig. 3. Pulse beam view in the positive direction of the x-axis. 沿x轴正方向脉冲光束视图

Fig. 4. Projection of adjacent pulsed laser beam on plane M. 相邻脉冲激光束在面M上的投影

Fig. 5. Geometrical relationship between the laser beam and the projected image.发射激光束与投影图像几何关系

Fig. 6. The echo power with different K(R), R and : (a) ; (b) ; (c) 回波功率P_r与K(R), R, 之间的关系　(a) ; (b) ; (c)

Fig. 7. Mathematical model of K(R): (a) The position of the center line of the beam; (b) the K(R) model when the left side of the beam intersects the target; (c) the K(R) model when the left side of the beam is separated from the target. K(R)数学模型　(a)光束中心线位置示意图; (b)光束左边沿线与目标相交时K(R)模型; (c)光束左边沿线与目标相离时K(R)模型

Fig. 8. The relationship between K(R) and , and : (a) The relationship between K(R) and , ; (b) the influence curve of , and on K(R). K(R)与 , 和 之间的关系　(a) , 与K(R)的关系; (b) , 和 对K(R)的影响曲线

Fig. 9. Effects of pulse frequency f, beam angle , and beam incidence angle on targets with different diameters: (a) ; (b) ; (c) . 脉冲频率f、光束角 和光束入射角 对不同目标直径的影响　(a) ; (b) ; (c)

Fig. 10. Maximum angle between adjacent pulse beams: (a) The relation curve between f1 and the position of the target circle; (b) value of and . 最大相邻脉冲光束夹角 　(a) f₁与目标圆位置关系曲线; (b) 与 取值计算

Fig. 11. Influence of and on echo power. (a) ; (b) ; (c) . 和 对系统回波功率的影响　(a) ; (b) ; (c)

Table 3. n_min, , and f_min at different incident angles . 不同入射角 下的n_min, , 以及f_min