Non-destructive measurements of the optical properties of apples by means of time-resolved reflectance

Cubeddu, Rinaldo and Pifferi, Antonio and Taroni, Paola and Torricelli, Alessandro and Valentini, Gianluca and Ruiz-Altisent, Margarita and Valero Ubierna, Constantino and Ortiz, Coral and Dover, Colin and Johnson, David (2000). Non-destructive measurements of the optical properties of apples by means of time-resolved reflectance. Monografía (Working Paper). E.T.S.I. Agrónomos (UPM) [antigua denominación].

Description

Title: Non-destructive measurements of the optical properties of apples by means of time-resolved reflectance
Author/s:
  • Cubeddu, Rinaldo
  • Pifferi, Antonio
  • Taroni, Paola
  • Torricelli, Alessandro
  • Valentini, Gianluca
  • Ruiz-Altisent, Margarita
  • Valero Ubierna, Constantino
  • Ortiz, Coral
  • Dover, Colin
  • Johnson, David
Item Type: Monograph (Working Paper)
Date: 2000
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Ingeniería Rural [hasta 2014]
UPM's Research Group: LPF-TAGRALIA
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Time-resolved reflectance is proposed and effectively used for the nondestructive measurement of the optical properties in apples. The technique is based on the detection of the temporal dispersion of a short laser pulse injected into the probed medium. The time-distribution of re-emitted photons interpreted with a solution of the Diffusion equation yields the mean values of the absorption and reduced scattering coefficients of the medium. The proposed technique proved valuable for the measurement of the absorption and scattering spectra of different varieties of apples. No major variations were observed in the experimental data when the fruit was peeled, proving that the measured optical properties are referred to the pulp. The depth of probed volume was determined to be about 2 cm. Finally, the technique proved capable to follow the change in chlorophyll absorption during storage.

More information

Item ID: 16394
DC Identifier: http://oa.upm.es/16394/
OAI Identifier: oai:oa.upm.es:16394
Deposited by: Servicio Biblioteca Universitaria
Deposited on: 11 Jul 2013 08:51
Last Modified: 21 Apr 2016 16:41
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