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Optical Loss Due to Diffraction by Concentrator Fresnel Lenses

: Hornung, T.; Nitz, P.

Fulltext urn:nbn:de:0011-n-3198792 (330 KByte PDF)
MD5 Fingerprint: 0e8340cb7dfc91659bdfebeffdd9bb20
Created on: 16.1.2015

Kinsey , G.S.; Riley, D.; Kurtz, S.; Araki, K.; Baudrit, M.:
10th International Conference on Concentrator Photovoltaic Systems, CPV-10 : 7–9 April 2014, Albuquerque
Woodbury, N.Y.: AIP, 2014 (AIP Conference Proceedings 1616)
ISBN: 978-0-7354-1253-8
International Conference on Concentrator Photovoltaic Systems (CPV) <10, 2014, Albuquerque/NM>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Solarthermie und Optik; III-V und Konzentrator-Photovoltaik; Konzentrator-Optik; optics; diffraction; lens; photovoltaics

Fresnel lenses are widely used in concentrating photovoltaic (CPV) systems as a primary optical element. They focus sunlight on small solar cells or on the entrance apertures of secondary optical elements. A Fresnel lens consists of several prism rings and diffraction by these prism rings is unavoidable. Some of the light that would reach a designated target area according to geometric optics will miss it due to diffraction. This diffraction loss may be of relevant magnitude for CPV applications. The results of published analytical calculations are evaluated, discussed, and compared to computer simulations and measurements.