title: Hyperparabolic concentrators.
abstract: We present a family of three-dimensional concentrators constructed from the photic field generated by a Lambertian emitter. The profile of these concentrators is obtained from the field lines for a two-dimensional truncated wedge and is based on the union between a hyperbola and a tilted parabola. By revolution of this profile, we obtain hyperparabolic concentrators (HPCs). In the limiting case when the focal length of the hyperbola becomes the radius of the exit aperture, the HPC becomes the well-known compound parabolic concentrator. On the other hand, when the focal length of the hyperbola becomes infinite, the HPC achieves the thermodynamic limit of concentration.
authors.affiliation: Departamento Física Aplicada a los Recursos Naturales, Universidad Politécnica de Madrid, Escuela Técnica Superior de Ingenieros de Montes, Ciudad Universitaria s/n, 28040 Madrid, Spain. angel.garciab@upm.es
authors.forename: Angel
authors.initials: A
authors.lastname: García-Botella
authors.forename: Antonio
authors.initials: A
authors.lastname: Alvarez Fernández-Balbuena
authors.forename: Daniel
authors.initials: D
authors.lastname: Vázquez
authors.forename: Eusebio
authors.initials: E
authors.lastname: Bernabeu
authors.forename: Agustín
authors.initials: A
authors.lastname: González-Cano