Abstract: A dimmable rearview mirror, particularly for motor vehicles comprising a reflective surface, two polarization filters spaced apart from each other and arranged in front of the reflective surface as seen in the direction of observation. A liquid crystal cell is disposed between the two polarization filters and includes cell glasses enclosing a liquid crystal substance. The cell glasses are provided with electrodes, the electrodes surfacewise covering essentially the entire surface of the reflective surface. A switchable and/or variable source of voltage is connected to the electrodes for adjusting the degree of reflection of the rearview mirror.