System and method for characterizing fibrous materials using...

G - Physics – 01 – N

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G01N 21/21 (2006.01) D21G 9/00 (2006.01) G01N 21/23 (2006.01) G01N 21/86 (2006.01) G01N 22/00 (2006.01) G01N 23/00 (2006.01)

Patent

CA 2703433

An apparatus (200) for determining fiber orientation parameters of a sheet of material during a production process includes a polarized radiation generating system (201, 202) operable for providing polarized radiation having a frequency of at least 1 x 108 Hz. The radiation is aligned to be incident on a sheet of material to be characterized (203). A polarimeter (204, 205) is aligned to receive the radiation transmitted by the sheet of material (203). A photodetector (206) is provided for measuring radiation received after polarization processing by the polarimeter. A processor (207) is coupled to the photodetector (206) for calculating Stokes parameters of the moving sheet (203) based upon intensities of the radiation received and determines at least one parameter relating to fiber orientation of the moving sheet based upon the Stokes parameters.

L'invention porte sur un appareil (200) pour déterminer des paramètres d'orientation de fibre d'une feuille de matériau pendant un procédé de production, l'appareil comprenant un système de génération de rayonnement polarisé (201, 202) actionnable pour fournir un rayonnement polarisé ayant une fréquence d'au moins 1 x 108 Hz. Le rayonnement est aligné pour être incident sur une feuille de matériau devant être caractérisée (203). Un polarimètre (204, 205) est aligné pour recevoir le rayonnement transmis par la feuille de matériau (203). Un photodétecteur (206) est prévu pour mesurer un rayonnement reçu après traitement de polarisation par le polarimètre. Un processeur (207) est couplé au photodétecteur (206) pour calculer des paramètres de Stokes de la feuille mobile (203) sur la base des intensités du rayonnement reçu et détermine au moins un paramètre relatif à l'orientation des fibres de la feuille mobile sur la base des paramètres de Stokes.

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