Laser scattering polarization characteristics of mist and painted target based on rotation angle

For the absence of laser polarization characteristics data, which can be used to distinguish between mist and painted metal target, then we have taken a test methods based on rotation angle of polarization of the incident laser, and measured the degree of linear polarization of thin mist and tanker samples, experimental result says: within the scope of the polarization angle of 45°, laser backscattering polarization characteristics have the ability to distinguish between mist and painted metal target samples. In order to verify this phenomenon, we changed frequency and pulse width parameters of the incident laser, then measured middle and high concentrations mist and painted armored vehicle samples. The verification results show that: under different frequency and pulse width of incident laser, with increasing the angle of incident laser polarization, the degree of laser backscattering polarization of mist decrease first and then increase, the minimum value of polarization show in 45°. But the degree of polarization of painted metal target samples do not change significantly, which are greater than middle and high concentration mist in the angle of 45°.