Fig. 1. Top view of prismatic film. (a) SEM surface image of polycarbonate thin prismatic film surface sputter coated with a thin gold layer. (b) A detail of the vertex.

Fig. 2. (a) Topographic image of the prismatic film obtained by the TOPAF technique. (b) Slope analysis of the previous image in absolute values. The slope is ±45° (tan(45°)=1) overall except in the defect and at the ridges.

Fig. 3. Different close-up images for (a, b) the top corners and (c, d) the bottom corners.

Fig. 4. Dependence of transmission for the different radii values in the corners: 0, 3, 6, and 9 μm for different aspect ratios.

Fig. 5. Transmission efficiency in the experimental assembly.

Fig. 6. Proposed model contributions with the transmission efficiency of each parameter obtained independently: the radius is the first term (solid line), the absorptance is the second term (dotted line), and the residual losses are third term obtained by the experimental fit (dashed–dotted line).

Fig. 7. Transmission efficiencies obtained in the experimental measure (marked solid line) and the simulation model (marked dashed line) with radii of 3 μm are shown for several aspect ratios. The fitted curve [Eq. (2)] is given by the red solid line, which takes all of the terms into account. The red dashed line represents the first two terms.