homerxu |
2009-06-22 15:36 |
For a thorough discussion both of the limitations of imaging (.Xr#;\( optical systems in the collection of radiant energy and of the p+<}YDMb nonimaging collectors which can be used to collect energy X4Xf2aXI efficiently, see W.T. Welford and R. Winston, High Collection _9kIRmT{ Nonimaging Optics, Academic Press (San Diego), 1989.
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