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9 December 2005 Sensitive measurement of water content in dry material based on low-frequency terahertz time-domain spectroscopy
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Proceedings Volume 6024, ICO20: Optical Devices and Instruments; 60240A (2005) https://doi.org/10.1117/12.666812
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China
Abstract
We proposed sensitive measurement of water content in dry material using low-frequency THz-TDS method. Simultaneous use of bowtie-type photoconductive antennas as a THz emitter and a THz detector achieves specific sensitivity in sub-THz region of ~0.3 THz, in which THz absorption of water is considerably decreased. Effectiveness of the proposed method is demonstrated through water content measurement in instant coffee powder in a glass bottle. The proposed system will be a powerful tool for extract quality control of water content in dry foods.
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Takeshi Yasui and Tsutomu Araki "Sensitive measurement of water content in dry material based on low-frequency terahertz time-domain spectroscopy", Proc. SPIE 6024, ICO20: Optical Devices and Instruments, 60240A (9 December 2005); https://doi.org/10.1117/12.666812
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