Design of an efficient Fresnel-type lens utilizing double total internal reflection for solar energy collection
Ian Wallhead1, Teresa Molina Jiménez, Jose Vicente García Ortiz
1AIDO, Instituto Tecnológico de Óptica, Color e Imagen, 7-13 Parque Tecnológico, 46980 Paterna, Valencia, Spain.
Optics Express
|November 29, 2012
Abstract:
A novel of Fresnel-type lens for use as a solar collector has been designed which utilizes double total internal reflection (D-TIR) to optimize collection efficiency for high numerical aperture lenses (in the region of 0.3 to 0.6 NA). Results show that, depending on the numerical aperture and the size of the receiver, a collection efficiency theoretical improvement on the order of 20% can be expected with this new design compared with that of a conventional Fresnel lens.


