NOVELTY - The device has a transparent or semi-transparent glazed wall (1) including an external face (1a) exposed to incidental solar light (7) of sun. The glazed wall is made of organic glass or crystalline glass. A polarizing filter (3) is arranged on trajectory of incidental rays light followed by a reflective unit (4) adapted to reflect entire or part of polarized light (8) toward the exposed face and to confer a modified polarization on the exposed face, so that reflected light is absorbed by the filter. The absorption of the reflected light causes heating of the glazed wall.    USE - Infrared solar radiation collecting device i.e. thermal solar panel, for use on a window, a sliding bay, a greenhouse wall, a swimming pool cover, a garden shelter, a port-hole of aircraft, a roof window, a freight vehicle window, a advertising poster, store window, a tile, a roof, and on devices using of transparent materials in a building trade, a freight vehicle, a display and a image diffusion device such as electronic display screen (all claimed).    ADVANTAGE - The polarizing filter is arranged on trajectory of incidental rays light followed by the reflective unit adapted to reflect entire or part of polarized light towards the exposed face and to confer modified polarization on the exposed face, so that reflected light is absorbed by the filter so as to cause heating of the glazed wall, so as to improve effectiveness of the device by increasing the level of capture of invisible solar energy such as infrared radiation while preserving proper transparency at visible light. The device has simple design, and is economic to use, and can easily be integrated in all kinds of support structures so as to make the panel usable in diversity of applications such as building applications and transport applications.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic illustration of a principle of a structure using two glazed walls, and its optical operation.    Transparent or semi-transparent glazed wall (1)    External face (1a)    Polarizing filter (3)    Reflective unit (4)    Incidental solar light (7)    Polarized light (8)