Ballistic imaging method and system based on infrared laser

The invention provides a trajectory imaging method and system based on infrared laser. The system comprises an infrared laser transmitting module, a receiving module and an upper computer, wherein the infrared laser transmitting module consists of a power supply, an infrared laser beam array, a scattering mirror, a collimating mirror and a shell; the receiving module is composed of a band-pass filter, a photodiode array, an outer frame and a data interface, an infrared laser beam array in the system emits multiple beams of infrared laser, and the multiple independent infrared laser beams form an infrared laser column capable of completely covering the photodiode array under the action of a scattering mirror and a collimating mirror; a band-pass optical filter on the receiving module can transmit light waves of which the wavelength is within an infrared light range; the photodiode array receives the infrared signal to form a path, and the upper computer records the power-on condition of each photodiode on the