Nonimaging Fresnel Lenses: Design and Performance of Solar Concentmtors;
what are we talking about? It is easy to forget that you, dear reader,
may not be one of those who work inexactly the same field as we do:
nonimaging optics for the concentration of sunlight. You may be a
researcher in some optical science interested in the core subject of
this book: the world's first practical design of a nonimaging Fresnel
lens concentrator. You may not be too excited about the collection of
solar energy, but you would want a fuB description of the optical
performance of the lens. Which you will get, mostly in terms of
nonimaging optics, complete with test results, and set against the
competition of imaging Fresnel lenses and mirror-based imaging and
nonimaging concentrators. If you are a solar energy professional, you
are likely to be interested in reading why nonimaging optics and solar
energy coBection go together so weB. They do so, because the
concentration of solar energy does not demand imaging qualities, but
instead requires flexible designs of highly uniform flux concentrators
coping with solar disk size, solar spectrum, and tracking errors.
Nonimaging optics has been developed to perfection since its discovery
in 1965, in dealing with solar power conversion. Much of this experience
is useful in nonimaging optical design in other fields where the markets
already are more rewarding than in solar power generation, such as
optoelectronics.