Abstract:
Transparent refractive-index matched micro (TRIMM) particles have proved to be an excellent scattering
component for use in translucent sheets. Measurements of hemispheric transmittance and reflectance
versus angle of incidence, as well as angle-resolved studies of such translucent sheets, have been carried
out to complement earlier published hemispheric reflectance and transmittance spectral measurements
carried out at normal angle of incidence. Hemispheric values relative to angle of incidence are of interest
for daylighting applications and building simulations, and angle-resolved measurements are vital for
verifying that our modeling tools are reliable. Ray-tracing simulations based on Mie scattering for the
individual TRIMM particles and angle-resolved measurements are in good agreement, indicating that the
simulation method used is practical for the design of new scattering profiles by varying particle concentration
or refractive index.
