4 August 2009 The detection and identification of selected lube base oil using terahertz time-domain spectroscopy
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Abstract
Using the terahertz time-domain spectroscopy (THz-TDS), the frequency-dependent absorption coefficient(s) and refractive index (indices) of selected lube base oil (LBO) were extracted in the spectral range of 0.3-1.6 THz. The selected LBO was also characterized by near-infrared spectrum. The experimental results reveal that LBO is more sensitive in the THz range than near-infrared, and the different viscosity index of LBO can be identified according to their different spectral features in THz range. Due to better repeatability, shorter testing time, and easy operation, THz- TDS can be used as a complementary for identifying the chemical composition of LBO.
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Tian Lu, Tian Lu, Qing-li Zhou, Qing-li Zhou, Bin Jin, Bin Jin, Kun Zhao, Kun Zhao, Song-qing Zhao, Song-qing Zhao, Cun-lin Zhang, Cun-lin Zhang, } "The detection and identification of selected lube base oil using terahertz time-domain spectroscopy", Proc. SPIE 7385, International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications, 738513 (4 August 2009); doi: 10.1117/12.835675; https://doi.org/10.1117/12.835675
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