A cost-effective laser solution for the detection of small Unmanned Aerial Vehicles (UAVs). LSD, unlike other low-cost systems, excels in nighttime conditions. It primarily consists of two parts: a surface laser beacon illuminating the object, and a separate camera processing the shadows cast by the object. Thanks to AI algorithms, we are able to predict the trajectory, speed, and probable time of impact of the given UAVs. This data can be relayed to authorized personnel, the frontline, or directly to air defense systems.