Remote sensing of oil pollution by portable laser induced fluorescence lidar

A portable laser induced fluorescence (LIF) lidar is designed and developed for oil pollution monitoring. A 405nm violet light is used as excitation light source. A dual Amici prism spectroscopic structure to split the fluorescence signal in the spectral range of 450-1000nm, and an image intensifier combined with array CCD to achieve high sensitivity detection. The system integrates control, data acquisition and data processing modules, which can realize the real-time detection of the composition and content of pollutants. The fluorescence spectra of seawater, diesel oil, oil and crude oil were measured at 30m. The spectra of diesel oil, engine oil and crude oil with concentration at 0.05, 0.01 and 0.01mg/L are measured. The LIF oil pollution monitoring system can accurately distinguish oil spill pollutants such as type and grade. It has small volume, light weight, high integration, high detection sensitivity and good stability characteristics, which can be loaded in small aircraft, unmanned aerial vehicles, ships for oil spill remote sensing.