Paper machine optical monitoring device and method

Details Paper machine optical monitoring device and method Paper machine optical monitoring device and method

G - Physics

01

N

73/51.5

G01N 21/01 (2006.01)

Patent

CA 1038192

ABSTRACT OF THE DISCLOSURE The present invention relates to an apparatus for measuring an optical property of a sheet material. The apparatus is comprised of a receiver for receiving a sheet material which has a fluorescent constituent, an optical system for directing light from a light source to a photometric sensor along a light path which includes the receiver; and a filter for con- trolling the light path so that the photometric sensor supplies respectively a first signal substantially exclusive of any fluorescent contribution and a second signal inclusive of a fluorescent contribution.

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