On the problem of ideal flux concentrators
JOSA, Vol. 68, Issue 4, pp. 531-534 (1978)
http://dx.doi.org/10.1364/JOSA.68.000531
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Abstract
We show that ideal flux collectors in the form of systems of axially symmetric systems which concentrate flux from a given angular extent with no loss in étendue are impossible; on the other hand, systems approaching this limit very closely can be designed.
© 1978 Optical Society of America
Citation
W. T. Welford and R. Winston, "On the problem of ideal flux concentrators," J. Opt. Soc. Am. 68, 531-534 (1978)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-68-4-531
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