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Proceedings Paper

New measurement technique that uses three near infrared diode lasers for nondestructive evaluation of sugar content in fruits
Author(s): Yoshiaki Shimomura; Toshitaka Takami; Yoshiki Ichimaru; Kenichi Matsuo; Ryuji Hyodo
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Paper Abstract

For non-destructive evaluation of sugar content in fruits, it has been proposed new measurement technique that uses three near infrared diode lasers. The reflectance Ri at the wavelength λi is defined by the ratio of two diffuse light powers reaching the two receiving fibers that were positioned at the different distance from a light emitting fiber. The value γ = ln (Ri/Rk)/ln (Rj/Rk) reaches the value that doesn't approximately depend on optical path length. As a simulation result of γ to a modeled apple, it was found that there are some combinations of three near-infrared wavelengths in which the correlation of γ and the sugar content of fruits raise. We actually evaluated the sugar content of apples by the use of three diode lasers 911nm, 936nm and 1055nm. As a result, it was confirmed that the measurement technique proposed here was usefulness.

Paper Details

Date Published: 7 March 2005
PDF: 9 pages
Proc. SPIE 5739, Light-Emitting Diodes: Research, Manufacturing, and Applications IX, (7 March 2005); doi: 10.1117/12.590135
Show Author Affiliations
Yoshiaki Shimomura, Industrial Technology Ctr. of Nagasaki (Japan)
Toshitaka Takami, Nagasaki Fruit Tree Experiment Station (Japan)
Yoshiki Ichimaru, Nagasaki Agricultural and Forestry Experiment Station (Japan)
Kenichi Matsuo, Nagasaki Agricultural and Forestry Experiment Station (Japan)
Ryuji Hyodo, Industrial Technology Ctr. of Nagasaki (Japan)


Published in SPIE Proceedings Vol. 5739:
Light-Emitting Diodes: Research, Manufacturing, and Applications IX
Steve A. Stockman; H. Walter Yao; E. Fred Schubert, Editor(s)

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