New measurement technique that uses three near infrared diode lasers for nondestructive evaluation of sugar content in fruits

Yoshiaki Shimomura; Toshitaka Takami; Yoshiki Ichimaru; Kenichi Matsuo; Ryuji Hyodo

doi:10.1117/12.590135

7 March 2005 New measurement technique that uses three near infrared diode lasers for nondestructive evaluation of sugar content in fruits

Yoshiaki Shimomura, Toshitaka Takami, Yoshiki Ichimaru, Kenichi Matsuo, Ryuji Hyodo

Author Affiliations +

Proceedings Volume 5739, Light-Emitting Diodes: Research, Manufacturing, and Applications IX; (2005) https://doi.org/10.1117/12.590135
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

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 R_i at the wavelength λ_i 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 (R_i/R_k)/ln (R_j/R_k) 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.

Citation Download Citation

Yoshiaki Shimomura, Toshitaka Takami, Yoshiki Ichimaru, Kenichi Matsuo, and Ryuji Hyodo "New measurement technique that uses three near infrared diode lasers for nondestructive evaluation of sugar content in fruits", Proc. SPIE 5739, Light-Emitting Diodes: Research, Manufacturing, and Applications IX, (7 March 2005); https://doi.org/10.1117/12.590135

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