| 光谱学与光谱分析 |
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| Experimental Methods and Result Analysis of a Variety of Spectral Reflectance Properties of the Thin Oil Film |
| YE Zhou1, LIU Li2, WEI Chuan-xin1, GU Qun2, AN Ping-ao1, ZHAO Yue-jiao1, YIN Da-yi1 |
| 1. Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China2. China Waterborne Transport Research Institute, Beijing 100088, China |
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Abstract In order to analysis the oil spill situation based on the obtained data in airborne aerial work, it’s needed to get the spectral reflectance characteristics of the oil film of different oils and thickness as support and to select the appropriate operating band. An experiment is set up to measure the reflectance spectroscopy from ultraviolet to near-infrared for the film of five target samples, which means petrol, diesel, lubricating oil, kerosene and fossil, using spectral measurement device. The result is compared with the reflectance spectra of water in the same experimental environment, which shows that the spectral reflection characteristics of the oil film are related to the thickness and the type of the oil film. In case of the same thickness, the spectral reflectance curve of different types of film is far different, and for the same type of film, the spectral reflectance curve changes accordingly with the change of film thickness, therefore in terms of the single film, different film thickness can be distinguished by reflectance curves. It also shows that in terms of the same film thickness, the reflectance of diesel, kerosene, lubricants reaches peak around 380 nm wavelength, obviously different from the reflectance of water, and that the reflectance of crude oil is far less than that of water in more than 340 nm wavelength, and the obtained reflection spectrum can be used to distinguish between different types of oil film to some extent. The experiment covers main types of spilled oil, with data comprehensively covering commonly used detect spectral bands, and quantitative description of the spectral reflectance properties of film. It provides comprehensive theoretical and data supprot for the selection of airborne oilspill detection working band and the detection and analysis of water-surface oil spill.
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Received: 2014-05-12
Accepted: 2014-08-16
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Corresponding Authors:
YE Zhou
E-mail: yeguitar@gmail.com
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