Design of missile target angle measurement path based on laser spot time-sharing method

A technical approach to measuring angle of multiple missiles using photoelectric methods was proposed. A semiconductor laser was mounted on the tail of missile to form a large width light source for angle tracing. It fired a pulsed laser array which was capable of penetrating plumes to the ground. When the guidance camera tracked the target, it also acquired the laser from the tracer, and calculated the angle between the spot and the target to complete the continuous measurement of the missile's angle, which was uploaded to the missile to form a closed-loop guidance. By timing control, the glow of the tracer and the exposure of the camera were synchronous. In each exposure period, light spots of only one missile could be received and the sequence pictures of each missile and target could be got, which supported the independent guidance of missiles through the marshalling of the camera video pictures. Test results show that the transmission distance reaches 9 000 m with the PM2.5 exponent of 120, the switching of 100 Hz dual light source can be realized and the encoding accuracy reaches 1 μs. This mode can satisfy the discrimination of detection ranges and missiles.