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Proceedings Paper

Effects of surface microstructure on macroscopic image shading
Author(s): Duje Tadin; Richard F. Haglund; Joseph S. Lappin; R. Alan Peters
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Paper Abstract

The reflectance characteristics of materials are known to have visible effects on image shading functions. The present study quantified the light scattering distributions form roughened glass and correlated these with the microscopic surface topography. Samples were 11 silica microscope slides, roughened with commercial diamond pastes with particle sizes ranging from 4-67 m. In-plane and out-of- plane scattering measurements were made with laser light incident at 45 degrees. In-plane scattering distributions for samples illuminated with 633 nm varied significantly in their shape, but all curves were roughly centered on the specular angles. In-plane scattering distributions for 514 nm also disappearance of specular components was observed for samples whose RMS roughness just exceeded the wavelength of light. The results indicate that small changes in microscopic surface roughness can produce large changes in scattering. Evidently, surface microstructure has a pronounced effect on macroscopic appearance.

Paper Details

Date Published: 8 June 2001
PDF: 10 pages
Proc. SPIE 4299, Human Vision and Electronic Imaging VI, (8 June 2001); doi: 10.1117/12.429493
Show Author Affiliations
Duje Tadin, Vanderbilt Univ. (United States)
Richard F. Haglund, Vanderbilt Univ. (United States)
Joseph S. Lappin, Vanderbilt Univ. (United States)
R. Alan Peters, Vanderbilt Univ. (United States)

Published in SPIE Proceedings Vol. 4299:
Human Vision and Electronic Imaging VI
Bernice E. Rogowitz; Thrasyvoulos N. Pappas, Editor(s)

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