Fig. 1. Schematic diagram of laser detection system

Fig. 2. Schematic diagram of target detected by laser. The size of the laser spot is close to the target projection area

Fig. 3. Different factors considered when calculating the optimal scanning mode

Fig. 4. Schematic diagram of the theory of optimal scanning mode calculation. The relationship between target matrix T, spot matrix S and scanning path matrix P on the target projection plane is shown. The detection process of laser pulse to the target plane is also described

Fig. 5. Schematic diagram of the shortest distance BDD from blind spot to detectable area. The red points denote the blind spot of the pattern, and the black arrows are the BDDs of the blind spots

Fig. 6. (a)-(f) Scanning path matrix P for different solutions. The radius of the rosette pattern is normalized and the scanning track is drawn. The repetition frequency of the laser is 40 kHz, that is, there are 800 scanning points in one period

Fig. 7. (a)-(f) Detection matrixE of rosette scanning for different solutions (The radius of the rosette pattern is normalized)

Fig. 8. Statistics of the blind spot to detectable area distance BDD of the detection matrix E corresponding to the six schemes