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Analytical investigation of diffraction in Fresnel lens concentrators

 
: Hornung, T.; Nitz, P.

:
Volltext urn:nbn:de:0011-n-2086116 (54 KByte PDF)
MD5 Fingerprint: 73290fe970cd27190a7143d55e696804
Erstellt am: 7.12.2012


Dimroth, F.:
7th International Conference on Concentrating Photovoltaic Systems 2011 : Las Vegas, Nevada, USA, 4-6 April 2011
Woodbury, N.Y.: AIP, 2012 (AIP Conference Proceedings 1407)
ISBN: 978-0-7354-0979-8
ISSN: 0094-243X
S.93-96
International Conference on Concentrating Photovoltaic Systems (CPV) <7, 2011, Las Vegas/Nev.>
Englisch
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ISE ()
Solarthermie und Optik; Angewandte Optik und funktionale Oberflächen; Konzentratoroptik

Abstract
When simulating the optical behavior of primary optics for concentrator photovoltaic systems, one usually utilizes ray tracing techniques. This approach considers geometrical optics only, whereas diffraction effects are generally assumed to be small enough to be neglected. When comparing our high precision optical measurements to computer simulation results the match between measurement and simulation data can be improved when diffraction is included. An analytical treatment of this problem is possible using the universal geometrical theory of diffraction. These formulas are evaluated for a miniature Fresnel lens concentrator. The influences of Fresnel prism size and of the divergence of the incident light are analyzed. Finally, the results are compared to ray tracing calculations that have been enhanced by an approximate treatment of diffraction.

: http://publica.fraunhofer.de/dokumente/N-208611.html