Detection of local specular gloss and surface roughness from black prints

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• 作者：Mikko Juuti ; Tuukka Prykä ; ri ; Erkki Alarousu ; Hanna Koivula ; Markko Myllys ; Arto Lä ; hteelä ; Martti Toivakka ; Jussi Timonen ; Risto Myllylä ; ; Kai-Erik Peiponen
• 关键词：Gloss ; Print ; Surface roughness ; Surface topography ; Paper ; Glossmeter ; Low-coherence interferometer ; X-ray micro-computed tomography
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2007
• 出版时间：15 May 2007
• 年：2007
• 卷：299
• 期：1-3
• 页码：101-108
• 全文大小：1235 K

文摘

A combination of optical and tomographic imaging techniques for inspection of local surface roughness and specular gloss of black prints and coated paper are introduced. A diffractive optical-element-based glossmeter (DOG) and a low-coherence interferometer (LCI) were used to obtain local information about the print in terms of topographic and gloss maps. X-ray microcomputed tomography (μCT) was used to obtain 3D local structural information of the coated paper. Gloss and topographic maps were used to determine statistical gloss and roughness parameters. These parameters were useful when analysing the surface condition of prints and coated paper. We found an orientation-dependent gloss slope, which reflects the fact that gloss does not depend on the surface roughness alone. Slope parameters turned out to be particularly sensitive to surface properties.