A radiation concentrator incorporating a main radiation concentrator (160) and an auxiliary radiation concentrator (161) that concentrates the incident radiation to the common receiver (3) is presented. The primary reflector (1) of the main concentrator (160) consists of two confocal parabolic reflectors (5a & 5b) on either side of the axial plane in such a way that their parabolic axes points at the centers of the diagonally opposite halves of the radiation source. The main concentrator (160) is configured in such a way that a part of the radiation reflected from every point on its primary reflector (1) is absorbed by the receiver (3) directly and its secondary reflector (2) reflects the other part of the radiation to the receiver (3). The auxiliary concentrator (161) concentrates a substantial part of the incident radiation, which would have been blocked by the secondary reflector (2), to the receiver (3).
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