Paper surface roughness analyzer

Details Paper surface roughness analyzer Paper surface roughness analyzer

G - Physics

01

B

G01B 7/34 (2006.01) G01B 5/28 (2006.01) G01B 21/30 (2006.01) G01N 33/34 (2006.01) G06F 15/20 (1990.01)

Patent

CA 2112792

PAPER SURFACE ROUGHNESS ANALYZER ABSTRACT OF THE DISCLOSURE Subjective paper characteristics such as visual appear- ance and print quality are often objectively related to certain scales of surface roughness. Three dimensional topographic surface data is obtained from a paper sample secured by vacuum to a flat, porous plate for translational movement in a grid pattern beneath a vertically compliant stylus that is resiliently suspended beneath a rigid, overhead support beam. Such surface data is mathematical- ly filtered by a linear convolution technique or the distinctly alternative circular convolution technique to segregate the raw data characteristics of component surfaces that contain only certain frequencies of roughness. The root-mean-square variations of such component surfaces is then used to objectively characterize respective surface characteristics.

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