"Determining the influential depth for surface reflectance
of sediment by BRDF measurements"
Optics Express 11, 2654-2665 (2003)
Abstract:
We measure the Bi-directional reflectance distribution
function (BRDF) of ooid sand layers with three particle
size distributions (0.5-1mm,0.25-0.5mm and 0.125-0.25mm)
and layer thicknesses on a reflecting mirror to
determine the influential depth in the optical region
at wavelengths of 658 nm (red), 570 nm (green) and
457 nm (blue). The hemispherical reflectance (albedo)
was used as an indicator of BRDF changes between different
layers. Measurements are carried out on both dry and
water wetted grains. The results indicate that for both
dry and wet and all size distributions, the influential
depth is at most 2mm.
Return
to BRDF Page