Figs. 10 and 11 show the results of the optical properties of the effective layer when changing the values of slat reflectance
to 0.2 and 0.8.
The slat reflectance has no effect on the direct-to-direct transmittance at all.
The effect of changing the slat reflectance is appeared in the values of the direct-to-diffuse transmittance, reflectance and absorptance of the effective layer.
The effect of slat curvature and slat thickness is clearly seen on the values of the direct-to-diffuse transmittance and reflectance for a higher reflectance blind especially when the blind is fully blocked from the sun (profile angle of 65 degree and greater).
Fig. 12 shows the comparison between the optical properties of the curved slat blind and a flat slat blind with thickness
having slat reflectance of 0.8 and slat angle at 45 degree.
The same mathematical model that accounted for the slat thickness effect and edge effect is used in calculating the
optical properties of a flat slat blind.
Therefore the difference shown in Fig. 12 is directly contributed to the effect of slat curvature only.
Besides the difference in the direct-to-direct transmittance shown at profile angle of 45 degree,the difference in the direct-to-diffuse transmittance and reflectance are clearly seen when the blind is fully blocked from the sun (profile angle of 65 degree and greater).
The effect of slat curvature and slat thickness on the optical properties of the effective layer is more pronounced when
the values of the slat curvature and slat thickness are increased.