NC State
L.F. Gate and D.J. Parsons. The specular reflection of polarised light from coated paper. In Products of Papermaking, Trans. of the Xth Fund. Res. Symp. Oxford, 1993, (C.F. Baker, ed.), pp 263–284, FRC, Manchester, 2018.


An experimental examination of the reflection of polarised light (s &p;k= 633 nm)from surfaces which have a significant specular component is presented. The reflected light intensity is measured using a detector with a narrow acceptance angle (0.50) and it is found, for a number of different surfaces based on coated paper, that as the detector scans through the angular distribution, the ratio of polarised light intensities (R~RS) changes in a systematic way which can be accurately predicted if the surface is modelled as an array of mirror-like facets each with the same refractive index, distributed in and around the mean plane ofthe coating. The change in the ratio R~RSwith detector position is independent of the angular distribution of the facets and depends on lyon the refractive index of the surface.

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