Acousto-Optical Evaluation Of Fiber Size In Wood Pulp

J L Dion; J J Garceau; J C Morissette

doi:10.1117/12.938812

23 October 1986 Acousto-Optical Evaluation Of Fiber Size In Wood Pulp

J L Dion, J J Garceau, J C Morissette

Proceedings Volume 0665, Optical Techniques for Industrial Inspection; (1986) https://doi.org/10.1117/12.938812
Event: 1986 Quebec Symposium, 1986, Quebec City, Canada

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.

Citation Download Citation

J L Dion, J J Garceau, and J C Morissette "Acousto-Optical Evaluation Of Fiber Size In Wood Pulp", Proc. SPIE 0665, Optical Techniques for Industrial Inspection, (23 October 1986); https://doi.org/10.1117/12.938812

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