NOVELTY - A radiant energy concentrator comprises first and second pairs of facing reflective sides positioned around a first axis and a second axis, respectively. The radiant energy is concentrated by first and second pairs of facing reflective sides at proximal end and where the distal end of the first pair of facing reflective sides is positioned adjacent to and at least partially transversely with the distal end of the second pair of reflective sides.    USE - For use with photovoltaic cell.    ADVANTAGE - The inventive concentrator can operate efficiently with only single axis tracking of the Sun in part because the reflective sides form orthogonal acceptance angles corresponding to the annual and daily apparent passage of the sun on earth.    DETAILED DESCRIPTION - Radiant energy concentrator comprises first pair of facing reflective sides positioned around a first axis, the first pair of facing reflective sides having a proximal end and a distal end, the first pair of facing reflective sides forming an aperture at the distal end to receive radiant energy, the radiant energy being concentrated by the first pair of facing reflective sides at the proximal end, the first pair of facing reflective sides having a first curvature; and second pair of facing reflective sides positioned around a second axis, the second pair of facing reflective sides having a proximal end and a distal end, the second pair of facing reflective sides forming an aperture at the distal end to receive radiant energy, the radiant energy being concentrated by the second pair of facing reflective sides at the proximal end, where the distal end of the first pair of facing reflective sides is positioned adjacent to and at least partially transversely with the distal end of the second pair of reflective sides, the second pair of reflective sides having a second curvature, where the first curvature is different than the second curvature.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the light concentrator.    Light concentrator (100)    Hollow reflector (110)    Solid reflector (112)    Light spreader (114)    Target photovoltaic cell (116)    Metal substrate (118)    Clear encapsulant (120)    Conductive tape negative contact (122)    Conductive tape positive contact (124)    Mounting portion of hollow reflector (126)    Flange (128b)    Bolt (130b)