The invention relates to a holding device (13) for holding a drive unit (7) of a deflection mirror arrangement (6) of an optical detection device (4) for a motor vehicle (1), wherein the holding device (13) comprises a holding part (14) integrally-formed with a light shield (15), wherein the light shield (15) is arranged in certain areas of the reflecting surface (11), when the drive unit (7) is held as intended by the holding device (13), in order to temporarily subdivide a reflecting surface (11) of at least one deflection mirror (8) of the deflection mirror arrangement (6), which deflectionmirror is mounted for rotation on an axis of rotation (9), into a transmission region (16) and a receiving region (17). The invention also relates to an optical detection device (4) and a motor vehicle (1).