Fourier optic characterization of paper surfaces

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 crep...

Full description

Saved in:
Bibliographic Details
Published in:Optical Engineering 1997-01, Vol.36 (1), p.35-39
Main Authors: Hansson, Peter, Manneberg, Go¨ran
Format: Article
Language:English
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. © Fourier optics; spatial light modulator; paper surface; crepe wavelength; wire mark; anisotropy.
ISSN:0091-3286
1560-2303
DOI:10.1117/1.601173