Semiconductor laser in range-gated night vision system

Range-gated night vision system with semiconductor pulse laser is an active image-forming system, which takes high power semiconductor laser and shimmer tube as lighting source and receiving sensor, respectively. Night vision system of semiconductor laser introduced in this paper adopts high quality semiconductor laser lighting source technology and range-gated technology, whose key technology is the semiconductor laser beam shaping and proportion technique. The system can eliminate the impact of back scattering light and stray light brought by the pulse laser and increase signal-to-noise ratio. It can obtain plain night vision figures. Experiments prove that the range-gated night vision system can obtain plain night vision figures in bad weather condition. Its function distance can reach to 5 km. Not only can the night vision system of semiconductor laser be used in military field, but also in frontier defense, public security, searching rescue, monitor field, etc.