Classification of oils an water using LIF spectrum parameters independent of the thickness of oil film

Methods of remote oil films diagnosis using laser induced fluorescence (LIF) spectra are usually based on correlation coefficients between the laboratory sample spectra and acquired in-situ spectra. Research shows that thickness of oil film affects the LIF spectra greatly. In this paper a method, which is independent of the thickness of oil film, is set forth to classify oils on water into three groups (namely lightly refined, crude, heavy residual oils) without using laboratory sample spectra. The method is useful for computer-based oil film spectra diagnosis. The experimental system is described