Thickness Measurement and Three-Dimensional Structure Imaging of Oil Slick on Water by Optical Coherence Tomography

摘要： Spectral Domain Optical Coherence Tomography (SD-OCT) with 1300 nm wavelength is employed to detect three-dimensional (3-D) volumetric structure, surficial characteristic and thickness of oil slicks on water surface. The results show that petroleum slick possesses bigger diffusion area but much thinner than diesel slick at the same volume on water. Through reconstructing the thickness of oil slick by single-pixel optical intensity of SD-OCT structure image, the axial depth accuracies of reconstructed dataset image with 2.2 μm in petroleum slick and 2.6 μm in diesel slick were obtained, respectively. To our knowledge, it is the first time to obtain 3-D structure and surficial characteristic of oil slick on water by using SD-OCT imaging, and employing single-pixel optical intensity for reconstructing the thickness of oil slick with higher accuracy.