title: Optical efficiency of solar concentrators by a reverse optical path method.
abstract: A method for the optical characterization of a solar concentrator, based on the reverse illumination by a Lambertian source and measurement of intensity of light projected on a far screen, has been developed. It is shown that the projected light intensity is simply correlated to the angle-resolved efficiency of a concentrator, conventionally obtained by a direct illumination procedure. The method has been applied by simulating simple reflective nonimaging and Fresnel lens concentrators.
authors.affiliation: ENEA C.R. E. Clementel, Via Martiri di Monte Sole 4, Bologna, Italy. parretta@fe.infn.it
authors.forename: A
authors.initials: A
authors.lastname: Parretta
authors.forename: A
authors.initials: A
authors.lastname: Antonini
authors.forename: E
authors.initials: E
authors.lastname: Milan
authors.forename: M
authors.initials: M
authors.lastname: Stefancich
authors.forename: G
authors.initials: G
authors.lastname: Martinelli
authors.forename: M
authors.initials: M
authors.lastname: Armani