Effects of surface microstructure on macroscopic image shading

Duje Tadin; Richard F. Haglund Jr.; Joseph S. Lappin; R. Alan Peters

doi:10.1117/12.429493

8 June 2001 Effects of surface microstructure on macroscopic image shading

Duje Tadin, Richard F. Haglund Jr., Joseph S. Lappin, R. Alan Peters

Author Affiliations +

Proceedings Volume 4299, Human Vision and Electronic Imaging VI; (2001) https://doi.org/10.1117/12.429493
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

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.

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Duje Tadin, Richard F. Haglund Jr., Joseph S. Lappin, and R. Alan Peters "Effects of surface microstructure on macroscopic image shading", Proc. SPIE 4299, Human Vision and Electronic Imaging VI, (8 June 2001); https://doi.org/10.1117/12.429493

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