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Proceedings Paper

Optical detection techniques for laser sorting machines
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Paper Abstract

In this work we summarize some of the results we obtained during our research of different physical phenomena which take place when a visible or near-infrared laser beam falls in onto a biological product, more in particular on a vegetable or on a fruit. The most important phenomena are surface reflection, selective absorption, fluorescence, absorption in the near-infrared and internal reflection. While the emphasis lays on the identification of the product type we will show that some of the demonstrated sorting principles can also be used for quality sorting: for example a determination of the ripeness of green vegetables or of the water/oil content of vegetables and fruits and a detection of the presence of the very harmful aflatoxines.

Paper Details

Date Published: 22 April 2006
PDF: 12 pages
Proc. SPIE 6189, Optical Sensing II, 61891F (22 April 2006); doi: 10.1117/12.660896
Show Author Affiliations
W. Meulebroeck, Vrije Univ. Brussel (Belgium)
H. Thienpont, Vrije Univ. Brussel (Belgium)


Published in SPIE Proceedings Vol. 6189:
Optical Sensing II
Brian Culshaw; Anna G. Mignani; Hartmut Bartelt; Leszek R. Jaroszewicz, Editor(s)

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