The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2011
Filed:
Sep. 23, 2004
Piermario Repetto, Orbassano, IT;
Denis Bollea, Orbassano, IT;
Davide Capello, Orbassano, IT;
Stefano Bernard, Orbassano, IT;
Pietro Perlo, Orbassano, IT;
Piermario Repetto, Orbassano, IT;
Denis Bollea, Orbassano, IT;
Davide Capello, Orbassano, IT;
Stefano Bernard, Orbassano, IT;
Pietro Perlo, Orbassano, IT;
CRF Societa Consortile per Azioni, Orbassano (Torino), IT;
Abstract
A light concentrator is described, for a device for the conversion of solar radiation into electrical, thermal or chemical energy, capable of conveying the radiation towards a surface of the conversion device. The concentrator comprises at least one portion of Fresnel lens of rotational symmetry, one face of which has a plurality of crests disposed concentrically about a center so as to form a segmented transverse profile of the portion of Fresnel lens. The profile is formed in such a manner that the focal distance of the Fresnel lens is variable in dependence on the radial distance from the center of the lens. The variation of the focal distance is determined such that, when the Fresnel lens is illuminated by polychromatic radiation, the superposition of the distributions of irradiance, produced by the lens at the individual wavelengths constituting the spectrum of the incident radiation, generates a substantially uniform distribution of polychromatic irradiance on the conversion device.