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Proceedings Paper

Nondestructive measurements of the optical properties of fruits by means of time-resolved reflectance
Author(s): Rinaldo Cubeddu; Antonio Pifferi; Paola Taroni; Alessandro Torricelli; Gianluca Valentini; Margarita Ruiz-Altisent; Constantino Valero; Coral Ortiz
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Paper Abstract

The non-destructive assessment of the quality of fruits is getting a crucial task. As a possible first step toward the noninvasive evaluation of quality, we propose the measurement of the internal optical properties of fruits and vegetables by means of time-resolved reflectance spectroscopy. Mode-locked dye and Titanium:Sapphire lasers are used as the illumination source. The reflectance signal is processed by an electronic chain for time-correlated single-photon counting. The time-dispersion of re-emitted photons is fitted to the solution of the diffusion equation, with absorption and transport scattering as free parameters. The whole instrumentation is computer-controlled and allows one to perform measurements from 610 to 1000 nm. Absorption and scattering spectra of several species of fruits were acquired, and particular attention was devoted to the optical characterization of apples.

Paper Details

Date Published: 15 July 1999
PDF: 5 pages
Proc. SPIE 3597, Optical Tomography and Spectroscopy of Tissue III, (15 July 1999); doi: 10.1117/12.356839
Show Author Affiliations
Rinaldo Cubeddu, INFM, Politecnico di Milano, and CEQSE (Italy)
Antonio Pifferi, INFM, Politecnico di Milano, and CEQES (Italy)
Paola Taroni, INFM, Politecnico di Milano, and CEQSE (Italy)
Alessandro Torricelli, INFM, Politecnico di Milano, and CEQSE (Italy)
Gianluca Valentini, INFM, Politecnico di Milano, and CEQSE (Italy)
Margarita Ruiz-Altisent, Polytechnic Univ. of Madrid (Spain)
Constantino Valero, Polytechnic Univ. of Madrid (Spain)
Coral Ortiz, Polytechnic Univ. of Madrid (Spain)


Published in SPIE Proceedings Vol. 3597:
Optical Tomography and Spectroscopy of Tissue III
Britton Chance; Robert R. Alfano; Bruce J. Tromberg, Editor(s)

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