Abstract: A motor vehicle headlight has a single light source and a single reflector which receives the light from the source, and which is tripod mounted on three bearing points defining the three apices of a triangle. The headlight has controlled displacement means for selectively displacing at least one of these bearing points in straight line movement. The controlled displacement means comprise a single beam switching device for displacing one of the three bearing points into one of only two discrete positions, namely a first position corresponding to a dipped beam and a second position, higher than the first position, corresponding to a main beam.

Abstract: A set of left and right motor vehicle headlamps, each headlamp including a reflector associated with a light source and a closure front-glass. In accordance with the invention, the left and right headlamps are respectively adapted to generate horizontally spread left and right illumination beams, each beam having a fuzzy edge on the left and on the right, said edges being asymmetric relative to the axis of the road, the left edge of the left beam being offset angularly to the left relative to the left edge of the right beam, and the right edge of the right beam being offset angularly to the right relative to the right edge of the left beam. Applications include forming homogeneous beams with a wide spread.

Abstract: A device for indicating the aim, at least in bearing, of the optical axis of the reflector of a motor vehicle headlight relative to a longitudinal axis of the vehicle, wherein the device comprises apparatus for establishing a reference direction and suitable for being mounted on a fixed portion of the vehicle to define a reference direction that is well determined relative to the longitudinal axis apparatus. Apparatus is also included for establishing the direction of the optical axis of the reflector and is fixed relative to the reflector and distinct from a surface of the reflector for generating its beam. Finally, an indicator is provided for establishing the position of the optical axis direction relative to the reference direction. Indications thus given by the device enable the reflector to be adjusted after is has been mounted on the vehicle.

Abstract: A motor vehicle headlight of the type comprising a single light source, a reflector including two zones suitable for generating two different respective light beams, a closure glass, and masking means situated in the vicinity of the source and capable of being displaced for selectively masking the light rays delivered by the source and propagating towards at least one of the two zones. According to the invention the two zones of the reflector are disposed side by side, each of them extending over the entire height of the reflector, each zone of the reflector is constituted by a portion of a reflecting surface sufficing on its own to generate the associated beam, and the masking means comprise at least one screen which, in its masking position, is situated to one side of the source.

Abstract: The invention relates to a main beam unit for a motor vehicle, said unit comprising first and second juxtaposed parabolic main beam headlamps (10, 20). In accordance with the invention, these headlamps are of different aperture diameters and of different focal lengths, with the aperture diameter d.sub.1 of the first headlamp being greater than the aperture diameter d.sub.2 of the second headlamp, and with the focal length f.sub.1 of the first headlamp being greater than the focal length f.sub.2 of the second headlamp.

Abstract: A headlamp comprising a reflector of which at least one sector is in the form of a paraboloid of reduction, a bulb with an axial filament offset upwards in the radial direction with respect to the axis of the paraboloid, and a light-distributing glass placed in front of the reflector. The filament is centered in the axial direction on the focus of the paraboloid. The surfaces of the reflector situated outside the sector in the form of a paraboloid are designed so as to produce images of the filament which are all situated below the cut-off. Alternatively, the light-distributing glass participates in the deflection, in combination with the surfaces of the reflector. In an advantageous variant the reflector is completely parabolic and homologous deflecting zones are then provided on the light-distributing glass to lower all the images thus produced below the cut-off.

Abstract: In a motor vehicle headlamp or the like, the required distribution of the light rays is achieved entirely by selecting an appropriate configuration for the reflector; the front glass is a plain glass having smooth front and rear surfaces. The reflector surface is, as far as possible, a plain paraboloidal surface, but is provided with elongate ribs in selected zones, to produce a spreading of the light rays reflected from these ribs; the light is spread transversely to the length of the ribs. The reflector surface also has offset portions which, like the basic reflector shape, are paraboloidal, but have their focus or foci displaced from the focus of the basic reflector shape.

Abstract: The invention relates to an automobile headlight comprising a light source, a reflector and a cover glass, wherein zones of the reflector giving rise to a concentration of the rays reflected on the cover glass are concealed, thus minimizing the heating of the glass, without substantially disturbing the luminous efficacy.

Abstract: The present invention relates to a headlight for automobile, with rectangular front opening, of the type comprising a reflector in the axis of which are disposed a light source for dipped-beam illumination cooperating with cut-off means, and a light source for far-beam illumination, a horizontal upper side and a horizontal lower side intersecting the reflector to delimit the rectangular opening of the headlight, wherein the upper side is substantially closer to the optical axis than the lower side, with the result that, for a total, unchanged height of the headlight, the zone of the mirror furnishing the dipped-beam illumination is reduced, this allowing an optimum compromise for far-beam and dipped-beam illumination.

Abstract: This invention relates to a motor vehicle headlamp lens.It is characterized in that at least one zone of ribs is formed by ribs of variable cross-section, so that the optical deflection effect varies from one point of the rib to another.Improvement of the characteristics of the beam passing therethrough.

Abstract: A motor vehicle headlamp lens has two zones A1 and B containing ribs of different width to produce different amounts of lateral spreading of the headlamp beam. Between these zones a transition zone A2 is provided where a gradual change in the width of the ribs occurs. In the transition zone there are provided novel separating surfaces between the ribs having one surface at an angle to the general plane of the lens which act as a prism to deflect light passing therethrough in a downward direction. In zones A1 and B, and in transition zone A2 the total thickness e of the lens at the crest of any rib is constant.

Abstract: The present invention relates to an automobile headlight comprising a parabolic reflector, a front glass and a twin-filament lamp for far-beam and dipped-beam located on the optical axis of the reflector on either side of the focus thereof, said headlight being characterized in that a screen located in the front and in the upper part of the lamp defines on the reflector a zone which is struck only by the rays issuing from the far-beam filament. The corresponding zone of the front glass is also determined solely as a function of the far-beam filament.

Abstract: A motor vehicle headlight of the type comprising a single light source, a reflector including two zones suitable for generating two different respective light beams, a closure glass, and masking means situated in the vicinity of the source and capable of being displaced for selectively masking the light rays delivered by the source and propagating towards at least one of the two zones. According to the invention the two zones of the reflector are disposed side by side, each of them extending over the entire height of the reflector, each zone of the reflector is constituted by a portion of a reflecting surface sufficing on its own to generate the associated beam, and the masking means comprise at least one screen which, in its masking position, is situated to one side of the source.