Detection method for ranging performance of IR laser rangefinder based on aerosol echo simulation

A novel detection method of IR laser rangefinder based on aerosol echo simulation is presented according to the detection requirement for ranging performance measurement. The detection system simulates atmospheric echo laser indoor so as to detect of ranging precision & maximum range distance. An optic-mathematical model based on MODRAN meteorological parameter database is established. Attenuation property of an assemble of a half wave plate and polarizer is discussed by Jones algorithm. FPGA is adopted to achieve presupposition time delay. The method makes distance simulation and energy simulation becoming a close loop realizing aerosol echo simulation. The experiment results have showed that the method can realize 50 m–22 km wide range distance simulation; echo delay precision is better than 2 ns; measurement accuracy of maximum range distance is 90%.