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Proceedings Paper

Sensitive measurement of water content in dry material based on low-frequency terahertz time-domain spectroscopy
Author(s): Takeshi Yasui; Tsutomu Araki
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Paper 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.

Paper Details

Date Published: 9 December 2005
PDF: 6 pages
Proc. SPIE 6024, ICO20: Optical Devices and Instruments, 60240A (9 December 2005); doi: 10.1117/12.666812
Show Author Affiliations
Takeshi Yasui, Osaka Univ. (Japan)
Tsutomu Araki, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 6024:
ICO20: Optical Devices and Instruments
James C. Wyant; X. J. Zhang, Editor(s)

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