Non-destructive optical characterisation of fruits with time-resolved reflectance spectroscopy.

Cubeddu, Rinaldo and Pifferi, Antonio and Taroni, Paola and Torriceli, Alejandro and Valentini, Gianluca and Ruiz-Altisent, Margarita and Valero Ubierna, Constantino and Ortiz Sanchez, Mª Coral (1999). Non-destructive optical characterisation of fruits with time-resolved reflectance spectroscopy.. In: "9 th. International Conference on Near Infrared Spectroscopy", junio,1999, Verona (Italia).

Description

Title: Non-destructive optical characterisation of fruits with time-resolved reflectance spectroscopy.
Author/s:
  • Cubeddu, Rinaldo
  • Pifferi, Antonio
  • Taroni, Paola
  • Torriceli, Alejandro
  • Valentini, Gianluca
  • Ruiz-Altisent, Margarita
  • Valero Ubierna, Constantino
  • Ortiz Sanchez, Mª Coral
Item Type: Presentation at Congress or Conference (Article)
Event Title: 9 th. International Conference on Near Infrared Spectroscopy
Event Dates: junio,1999
Event Location: Verona (Italia)
Title of Book: International Conference on Near Infrared Spectroscopy
Date: 1999
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

Increasing attention is being paid to the possible development of non-invasive tests for the assessment of the quality of fruits We propose a novel non-destructive method for the measurement of the internal optical properties of fruits and vegetables by means of time resolved reflectance spectroscopy in the visible and NIR range. A fully automated instrumentation for time-resolved reflectance measurements was developed It is based on mode-locked laser sources and electronics for time-correlated single photon counting, and provides a time-resolution of 120-160 ps The system was used to probe the optical properties of several species and varieties of fruits and vegetables in the red and NIR range (650-1000 nm). In most fruits, the absorption line shape is dominated by the absorption peak of water, centred around 970 nm Generally, the absorption spectra also show the spectral features typical of chlorophyll, with maximum at 675 nm In particular, for what concerns apples, variations in peak intensity are observed depending on the variety, the degree of ripeness as well as the position on the apple. For all the species and varieties considered, the transport scattering coefficient decreases progressively upon increasing the wavelength.

More information

Item ID: 23432
DC Identifier: http://oa.upm.es/23432/
OAI Identifier: oai:oa.upm.es:23432
Deposited by: Servicio Biblioteca Universitaria
Deposited on: 08 Apr 2014 10:30
Last Modified: 21 Apr 2016 23:06
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