Atmospheric influence on computational ghost imaging semi-active laser detection system

Abstract

Conventional semi-active laser guidance (SAL) systems take advantage of the laser designator to illuminate precisely and form a laser spot on the target. The seeker collects reflected light by a quadrant detector and converts to relative position information to guide the missile to the target accurately. Computational ghost imaging (CGI) provides new promising scheme for semi-active laser guidance in virtue of the similarity in the system composition. As with traditional optical imaging processes, scattering and turbulence in atmospheric medium interfere with the final imaging result. In this work, a mathematical model of entire imaging process is established basing on principles of Mie scattering of colloidal particles and scintillation of turbulence. Analysis of the SNR of the reconstructed image to different environment parameters or system parameters indicates that both scattering and turbulence lead to a decrease in imaging quality. In the mechanism of action, turbulence introduces a random multiplicative noise while scattering highlights the interference of the inherent additive noise to the imaging system.