A Near-Infrared (NIR) Technique for Imaging Food Materials

Authors

  • P. Pallav,

    1. Authors Pallav, Diamond, Hutchins, and Green are with School of Engineering, Univ. of Warwick, Coventry CV4 7AL, U.K. Author Gan is with NDT Technology Group, TWI Ltd., Granta Park, Great Abington, Cambridge CB21 6AL, U.K. Direct inquiries to author Hutchins (E-mail: D.A.Hutchins@warwick.ac.uk).
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  • G.G. Diamond,

    1. Authors Pallav, Diamond, Hutchins, and Green are with School of Engineering, Univ. of Warwick, Coventry CV4 7AL, U.K. Author Gan is with NDT Technology Group, TWI Ltd., Granta Park, Great Abington, Cambridge CB21 6AL, U.K. Direct inquiries to author Hutchins (E-mail: D.A.Hutchins@warwick.ac.uk).
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  • D.A. Hutchins,

    1. Authors Pallav, Diamond, Hutchins, and Green are with School of Engineering, Univ. of Warwick, Coventry CV4 7AL, U.K. Author Gan is with NDT Technology Group, TWI Ltd., Granta Park, Great Abington, Cambridge CB21 6AL, U.K. Direct inquiries to author Hutchins (E-mail: D.A.Hutchins@warwick.ac.uk).
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  • R.J. Green,

    1. Authors Pallav, Diamond, Hutchins, and Green are with School of Engineering, Univ. of Warwick, Coventry CV4 7AL, U.K. Author Gan is with NDT Technology Group, TWI Ltd., Granta Park, Great Abington, Cambridge CB21 6AL, U.K. Direct inquiries to author Hutchins (E-mail: D.A.Hutchins@warwick.ac.uk).
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  • T.H. Gan

    1. Authors Pallav, Diamond, Hutchins, and Green are with School of Engineering, Univ. of Warwick, Coventry CV4 7AL, U.K. Author Gan is with NDT Technology Group, TWI Ltd., Granta Park, Great Abington, Cambridge CB21 6AL, U.K. Direct inquiries to author Hutchins (E-mail: D.A.Hutchins@warwick.ac.uk).
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Abstract

ABSTRACT:  The results of imaging experiments in food materials are presented, using near-infrared wavelengths. The technique uses a modulated source and a lock-in amplifier detection circuit to give a high sensitivity to changes in through-transmission signal levels. This is shown to lead to a set of images, whereby the internal content of various foods can be imaged. Examples are presented of the detection of foreign bodies, both metallic and nonmetallic, to illustrate the imaging performance.

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