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Optical Engineering

Fourier optic characterization of paper surfaces
Author(s): Peter Hansson; Goran Manneberg
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Paper Abstract

We investigate the possibility of using a Fourier optic method for on-line determination of the quality of paper. A spatial light modulator is used for the incoherent to coherent image conversion that is necessary since most paper types are opaque. Three different properties are studied, namely crepe frequency, periodicity and amplitude of wire marks and surface structure anisotropy, all of them important factors for controlling the production process. The experiments show that it is indeed possible to achieve good results in measurements down to an exposure time of about 1/1000 s.

Paper Details

Date Published: 1 January 1997
PDF: 5 pages
Opt. Eng. 36(1) doi: 10.1117/1.601173
Published in: Optical Engineering Volume 36, Issue 1
Show Author Affiliations
Peter Hansson, STFI (Sweden)
Goran Manneberg, Royal Institute of Technology (Sweden)

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