NOVELTY - A photovoltaic device comprises distinct photovoltaic cell arrays (C1-C3) of maximum sensibility in respective spectral region of collected radiation; greater than or equal to 2 dichroic filters (6, 7) disposed in cascade along an optical axis of a transparent entrance pupil, splitting it in distinct beams (F2-F4) of different spectrum; and mirrors (8-l0) having reflecting surfaces, each mirror intercepting a respective beam of spectral splitting of the entering beam of concentrated radiation.    USE - Photovoltaic device for converting solar radiation (claimed).    ADVANTAGE - The device has concentration of collected radiation and spectral splitting that does not require externally positioned complex light collecting and concentrating and spectrally conditioned focusing optical structures of large dimensions.    DETAILED DESCRIPTION - Photovoltaic device comprises distinct photovoltaic cell arrays (C1-C3) of maximum sensibility in respective spectral region of collected radiation different from that of the cells of the other arrays, placed on respective areas of inner surfaces of a sealed box-like body (3) having transparent pupil (P) of entrance of concentrated and collimated beam (F1) of collected solar radiation; greater than or equal to 2 dichroic filters (6, 7) disposed in cascade along an optical axis of the transparent entrance pupil, splitting it in distinct beams (F2-F4) of different spectrum; and mirrors (8-l0) having reflecting surfaces, each mirror intercepting a respective beam of spectral splitting of the entering beam of concentrated radiation, and subdivides the intercepted beam in reflected beams from the reflecting surfaces, each directed to illuminate an active area of a photovoltaic cell (11-13) of the respective array.    DESCRIPTION OF DRAWING(S) - The drawing is a basic layout view of the photovoltaic device.    Body (3)    Dichroic filters (6, 7)    Mirrors (8-l0)    Photovoltaic cell (11-13)    Photovoltaic cell arrays (C1-C3)    Collimated beam (F1)    Distinct beams (F2-F4)    Transparent pupil (P)