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Proceedings Paper

Fresnel lens solar concentrator design based on geometric optics and blackbody radiation equation
Author(s): Michael D. Watson; Robert R. Jayroe
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Paper Abstract

Fresnel lenses have been used for years as solar concentrators in a variety of applications. Several variables effect the final design of these lenses including: lens diameter, image spot distance from the lens, and bandwidth focused in the image spot. Defining the image spot as the geometrical optics circle of least confusion, a set of design equations has been derived to define the groove angles for each groove on the lens. These equations allow the distribution of light by wavelength within the image spot to be calculated. Combining these equations with the blackbody radiation equations power, power distribution, and flux within the image spot can be calculated. In addition, equations have been derived to design a lens to produce maximum flux in a given spot size. Using these equations, a lens may be designed to optimize the spot energy concentration for given energy source.

Paper Details

Date Published: 6 October 1999
PDF: 9 pages
Proc. SPIE 3781, Nonimaging Optics: Maximum Efficiency Light Transfer V, (6 October 1999); doi: 10.1117/12.368239
Show Author Affiliations
Michael D. Watson, NASA Marshall Space Flight Ctr. (United States)
Robert R. Jayroe, Pace & Waite, Inc. (United States)


Published in SPIE Proceedings Vol. 3781:
Nonimaging Optics: Maximum Efficiency Light Transfer V
Roland Winston, Editor(s)

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