Abstract

We have used angular light scattering to determine the relative surface finishes of glossy paper samples. The measurements were taken on the DALLAS light scattering instrument. In this instrument, a heliumneon laser beam is incident on the surface at a preset angle, and the intensity of light scattered in the plane of incidence is detected at 2° intervals over a 172° angular range. Three different paper samples were studied. For all three samples, the bulk scattering was identical, as evidenced by similar light scattering patterns at high scattering angles (>7°, measured from the forward direction). However the samples did show differences in the intensity of the specular/ near forward beam, indicating variations in surface finish between them. Three angles of incidence were used (15°, 30°, and 45° from normal), and the relative intensities of the specular/near forward beams were consistent in all cases.

© 1989 Optical Society of America