title: Design of an efficient Fresnel-type lens utilizing double total internal reflection for solar energy collection.
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.
authors.affiliation: AIDO, Instituto Tecnológico de Óptica, Color e Imagen, 7-13 Parque Tecnológico, 46980 Paterna, Valencia, Spain.
authors.forename: Ian
authors.initials: I
authors.lastname: Wallhead
authors.forename: Teresa Molina
authors.initials: TM
authors.lastname: Jiménez
authors.forename: Jose Vicente García
authors.initials: JV
authors.lastname: Ortiz
authors.forename: Ignacio Gonzalez
authors.initials: IG
authors.lastname: Toledo
authors.forename: Cristóbal Gonzalez
authors.initials: CG
authors.lastname: Toledo