Supercontinuum light sources for hyperspectral subsurface laser scattering: applications for food inspection

Authors:
Otto Højager Attermann Nielsen;Anders Lindbjerg Dahl;Rasmus Larsen;Flemming Møller;Frederik Donbæk Nielsen;Carsten L. Thomsen;Henrik Aanæs;Jens Michael Carstensen
Affiliations:
DTU Informatics, Technical University of Denmark;DTU Informatics, Technical University of Denmark;DTU Informatics, Technical University of Denmark;DANISCO A/S;NKT Photonics A/S;NKT Photonics A/S;DTU Informatics, Technical University of Denmark;DTU Informatics, Technical University of Denmark
Venue:
SCIA'11 Proceedings of the 17th Scandinavian conference on Image analysis
Year:
2011

Citing 3
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Abstract

A materials structural and chemical composition influences its optical scattering properties. In this paper we investigate the use of subsurface laser scattering (SLS) for inferring structural and chemical information of food products. We have constructed a computer vision system based on a supercontinuum laser light source and an Acousto-Optic Tunable Filter (AOTF) to provide a collimated light source, which can be tuned to any wavelength in the range from 480 to 900 nm. We present the newly developed hyperspectral vision system together with a proof-of-principle study of its ability to discriminate between dairy products with either similar chemical or structural composition. The combined vision system is a new way for industrial food inspection allowing non-intrusive online process inspection of parameters that is hard with existing technology.