Anamorphic concentration of solar radiation beyond the one-dimensional thermodynamic limit.
We propose and demonstrate a new scheme for anamorphic concentration of a big (40 cm x 40 cm) diffuse light source to achieve an extremely high concentration in one lateral direction at the expense of that in the other direction, to preserve the total (two-dimensional) optical brightness. Such anamorphic concentration is achieved by a combination of two conventional two-dimensional concentrators and a properly designed retroreflector array. Our experiments in search of a diffuse white-light source with properties comparable with those of solar radiation have yielded 28-fold improvement of the one-dimensional concentration ratio compared with those of conventional concentrators and 14-fold improvement compared with the one-dimensional thermodynamic limit.
Davidson
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Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel. fedavid@wis.weizmann.ac.il
Khaykovich
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Hasman
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