The invention relates to a reflector (6) comprising a supporting structure (18) and a mirror (16) that is preferably of non-planar form, the structure (18) being equipped with pivoting members (19) that allow the reflector to be rotated. According to the invention, the mirror (16) includes a plurality of adjacent mirror elements (16a), the reflector includes, associated with each mirror element (16a), a chassis (20) that is interposed between the structure (18) and the mirror element and that includes crosspieces (22) to which are fastened rails (24), the non-reflective surface of the mirror element (16a) being fastened to the rails (24) preferably using adhesive, the structure (18) comprises members (40) for positioning each chassis, forming points of contact (42) that define a reference bearing surface (46) for the frame (20), and each chassis (20) is mounted on the structure (18) using mechanical fastening means (36, 38) that are preferably demountable.
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