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Proceedings Paper

Application of optical spectroscopy to paper production
Author(s): Carl Magnus Nilsson; Jorgen Carlsson; Lars Malmqvist; W. Persson
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Paper Abstract

Fluorescence from paper following excitation by either ultraviolet or visible light gives information on the chemical composition of the paper. This can be used for on-line monitoring of the paper during production. Such measurements can be performed non-intrusively at sampling rates high enough to give a sub-millimeter resolution at paper webs moving at velocities higher than 20 meters per second. Two types of fluorescence meters, operating at different wavelengths, have been constructed. Together with an optical speedometer they have been tested at newsprint producing paper mills. A fluorescence based method for scanning cross-directional newsprint profiles in the laboratory has been developed. From these measurements the relative shrinkage of the paper during drying can be calculated using time-frequency analysis.

Paper Details

Date Published: 21 September 1999
PDF: 8 pages
Proc. SPIE 3824, Optical Measurement Systems for Industrial Inspection, (21 September 1999); doi: 10.1117/12.364266
Show Author Affiliations
Carl Magnus Nilsson, Halmstad Univ. and Lund Institute of Technology (Sweden)
Jorgen Carlsson, Halmstad Univ. and Lund Institute of Technology (Sweden)
Lars Malmqvist, Lund Institute of Technology (Sweden)
W. Persson, Lund Institute of Technology (Sweden)

Published in SPIE Proceedings Vol. 3824:
Optical Measurement Systems for Industrial Inspection
Malgorzata Kujawinska; Wolfgang Osten, Editor(s)

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