Abstract: The invention relates to an optical filter comprising an optical source (2), emitting a light beam comprising a plurality of wavelengths, an optical receiver (3), and, optically aligned between the source (2) and receiver (3), at least one collimating and converging optical element (10), one dispersive optical element (20) capable of angularly separating the wavelengths, and a reflecting element (30) mobile about an axis (AA) capable, depending on its orientation about the axis (AA), of reflecting a specific wavelength toward the optical receiver (3). The optical elements (10, 20, 30) are arranged so that the light beam passes at least once through the dispersive element (20) before reaching the optical receiver (3). According to the invention the reflecting element (30) includes at least two faces (31, 32) defining a first and a second plane intersecting on a line parallel to the axis (AA) of rotation of the reflecting element (30).

Abstract: A coupling device (1, 2) for optical fibres (19) comprises a first sheet (11) equipped with a plurality of through-holes (13), of which a portion 13a, at least, has a diameter adjusted to the diameter of said optical fibres (19), and a second sheet (12) joined to said first sheet (11) by a face. Said device (1, 2) also comprises a third sheet (15), joined to said first sheet (11), and equipped with a plurality of through-holes (16), of which a portion (16a), at least, has a diameter adjusted to the diameter of said optical fibres (19), aligned relative to the holes (13) of said first sheet (11), so as to form recesses (18, 25) with which said optical fibres (19) are engaged.