Mathematical Analysis of Nonimaging Fresnel Lenses Using Refractive and Total Internal Reflection Prisms for Sunlight Concentration

Figure 7

Transmittance obtained in each of the prisms of 3 different Fresnel lenses with the same input parameters. The black line in graphs (a), (b), and (c) corresponds to the transmittance for the optical path when and the red line when , and the blue line is the average of both. The graph is a Fresnel lens with refractive prisms, (b) is a Fresnel lens with TIR prisms, and (c) is a hybrid Fresnel lens. Graph (d) is a comparison between the average transmittance of the 3 lenses.

(a)

(b)

(c)

(d)