Proceedings of the Korean Society of Near Infrared Spectroscopy Conference (한국근적외분광분석학회:학술대회논문집)
- 2001.06a
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- Pages.1182-1182
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- 2001
APPLICATION OF TIME-OF-FLIGHT NEAR INFRARED SPECTROSCOPY TO WOOD
- Tsuchikawa, Satoru (Graduate School of Bioagricultural Sciences, Nagoya University) ;
- Tsutsumi, Shigeaki (School of Engineering, Fukui University of Technology)
- Published : 2001.06.01
Abstract
In this study, the newly constructed optical measurement system, which was mainly composed of a parametric tunable laser and a near infrared photoelectric multiplier, was introduced to clarify the optical characteristics of wood as discontinuous body with anisotropic cellular structure from the viewpoint of the time-of-flight near infrared spectroscopy (TOF-NIRS). The combined effects of the cellular structure of wood sample, the wavelength of the laser beam λ, and the detection position of transmitted light on the time resolved profiles were investigated in detail. The variation of the attenuance of peak maxima At, the time delay of peak maxima Δt and the variation of full width at half maximum Δw were strongly dependent on the feature of cellular structure of a sample and the wavelength of the laser beam. The substantial optical path length became about 30 to 35 times as long as sample thickness except the absorption band of water. Δt
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