Split off-specular reflection and surface scattering from woven materials

Sylvia C. Pont, Jan J. Koenderink

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)


We measured radiance distributions for black lining cloth and copper gauze using the convenient technique of wrapping the materials around a circular cylinder, irradiating it with a parallel light source and collecting the scattered radiance by a digital camera. One family of parallel threads (weave or weft) was parallel to the cylinder generator. The most salient features for such glossy plane weaves are a splitting up of the reflection peak due to the wavy variations in local slopes of the threads around the cylinders and a surface scattering lobe due to the threads that run along the cylinder. These scattering characteristics are quite different from the (off-)specular peaks and lobes that were found before for random rough specular surfaces, The split off-specular reflection is due to the regular structures in our samples of man-made materials. We derived simple approximations for these reflectance characteristics using geometrical optics.

Original languageEnglish
Pages (from-to)1526-1533
Number of pages8
JournalApplied Optics
Issue number8
Publication statusPublished - 10 Mar 2003
Externally publishedYes

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