plate essentially extends in the plane of the mirror surface and engages into the sliding elements of the slide potentiometers 7a and 7b via the connecting pins 15a and 15b the connecting rod 10 comprises an aperture extending longitudinally of the connecting rod at such a plate where it engages into the sliding element or the slide resistor 7b via connecting pins 15a and 15b and an aperture transversally to the connecting rod 10 at such a place where it engages into the slide element of the slide resistor 7a slide potentiometer 7a is located such that its slide element moves transversally toward the longitudinal direction of the connecting rod 10 and the slide potentiometer 7b is located such that the slide element thereof moves along the connecting rod 10 the plate 17 and the connecting rod 10 are such flat that the mirror housing 2 can be formed flat and the depth thereof does not increase or does not essentially increase to well known mirrors with the rotation of the mirror housing 2 about one of two orthogonal axes being perpendicular to the normal of the mirror surface the fastening member 11 is moved relative to the connecting rod 10 in the direction of the other axis respectively accordingly with these motions a relative motion results between the slide resistor 7a and slide resistor 7b secured to.