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Title: Bulk optical properties of potato flesh in the 500-1900 nm range
Authors: López-Maestresalas, Ainara ×
Aernouts, Ben
Van Beers, Robbe
Arazuri, Silvia
Carmen, Jarén
De Baerdemaeker, Josse
Saeys, Wouter #
Issue Date: Mar-2016
Publisher: Springer New York
Series Title: Food and Bioprocess Technology vol:9 issue:3 pages:463-470
Abstract: In this study the optical properties of potato flesh tissue were estimated using double integrating sphere (DIS) measurements combined with an inverse adding doubling (IAD) light propagation model. Total reflectance, total transmittance and unscattered transmittance were measured for the wavelength range 500–1900 nm with 5 nm resolution. From these measurements, the bulk optical properties (absorption coefficient, scattering coefficient and anisotropy factor) of 53 potato tubers of the Hermes cultivar were estimated. The estimated absorption coefficient spectra were dominated by water and starch absorption bands, the main chemical components of potato tissue. Comparison of these values to those reported in literature for similar products showed comparable absorption profiles. The obtained scattering coefficient spectra showed a smooth decrease from 166 cm-1 to 160 cm-1 in the NIR spectral range with increasing wavelength, which is common for biological tissues. The anisotropy factor spectra obtained for the full wavelength range studied, ranged between 0.949 and 0.959 with a maximum variability of 0.009 among the set of samples used. The information obtained in this study is essential to understand the effects of absorption and scattering on the propagation of light through the potato tubers in order to design more efficient sensors for non-destructive quality evaluation.
ISSN: 1935-5130
Publication status: accepted
KU Leuven publication type: IT
Appears in Collections:Division of Mechatronics, Biostatistics and Sensors (MeBioS)
Faculty of Bioscience Engineering
× corresponding author
# (joint) last author

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