Dual-wave technology used in laser-fuse anti-interfere

Laser fuse is widely used for its excellent performance, but its also has shortage in anti-interferences of fog and aerosols. In order to solve this problem, a dual-wavelength technology used in anti-interferences for long range and short distance detection was presented based on the principle of laser fuse. The scattering character of the special fog and aerosols environment was calculated by using the Rayleigh scattering method and Mie scattering method. The scattering characters in different environment were analyzed by using ultraviolet and infrared wave band. The results indicate that the ratio of proportion-discrimination in fog and aerosols environment is usually greater than 2. This method was also validated by experiment. Based on the full system, the dual-wavelength technology can be well applied. The result of the experiments also proves that the technology is efficient, especially in the heavy fog and aerosols environment. The method can also be used in anti-interfere for long range detection.