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Proceedings Paper

Acousto-Optical Evaluation Of Fiber Size In Wood Pulp
Author(s): J L Dion; J J Garceau; J C Morissette
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Paper Abstract

In the pulp and paper industry, the problem of regular and fast evaluation of wood fiber characteristics such as length and specific area is an important one. With this in view, we have been studying an acousto-optical technique based on the acoustic agglomeration of fibers in a water suspension, where a stationary ultrasonic field is created at about 150 kHz. Under the influence of radiation forces, fibers re-orient themselves parallel to the nodal planes of acoustic pressure, and regroup or agglomerate in these planes in different characteristic times. These are mesured by means of the light scattered at small angles. We have found that these times depend on the size distribution of fibers, particularly length. We present results obtained with an assortment of fiber types, under various experimental conditions which indicate eventual applications in the automatic control of pulp production.

Paper Details

Date Published: 23 October 1986
PDF: 5 pages
Proc. SPIE 0665, Optical Techniques for Industrial Inspection, (23 October 1986); doi: 10.1117/12.938812
Show Author Affiliations
J L Dion, Universite du Quebec A Trois-Rivieres (Canada)
J J Garceau, Universite du Quebec A Trois-Rivieres (Canada)
J C Morissette, Universite du Quebec A Trois-Rivieres (Canada)

Published in SPIE Proceedings Vol. 0665:
Optical Techniques for Industrial Inspection
Paolo G. Cielo, Editor(s)

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