FR2828152A1 - DEVICE FOR MASKING LIGHTING PROJECTORS OF MOTOR VEHICLES - Google Patents

Abstract

The invention relates to a device for masking motor vehicle lighting projectors. The invention consists in that it comprises at least one transparent optical element (B) interposed on the path of the light rays between the light sources and the projector glass, said optical element (B) comprising an entry face (E3) cylindrical with radius R and an exit face (E4) cylindrical with radius R symmetrical with the entry face (E3) with respect to a vertical median plane arranged at a distance 2R from the entry faces (E3) and outlet (E4), a cover (C) being disposed in said vertical median plane and spaced from the horizontal plane of symmetry. Application to the lighting of motor vehicles.

Description

its capacity.

  The invention relates to lighting projectors for motor vehicles. m = - - :): s Device for masking lighting headlights for motor vehicles. The panes of such projectors today cover multiple lighting means, at least dipped beam and road lighting, with various electrical sources surrounded by individual reflectors. This results in a very technical, unattractive aspect, which harms the perception of the line.

of the whole vehicle.

  The present invention aims to eliminate or at least greatly attenuate the visibility from the outside of the lighting means covered by the window of a motor vehicle headlamp and possibly make it possible to give the assembly an asect

  colored to match the body color.

  To this end, the subject of the invention is a device for masking motor vehicle lighting projectors, characterized in that it comprises at least one transparent optical element interposed on the path of the light rays between the lighting sources and the projector glass, said optical element comprising a cylindrical entry face of radius R and a cylindrical exit face of radius R symmetrical with the entry face with respect to a vertical median plane disposed at a distance 2R from the faces d entry and exit, a cover being disposed in said vertical median plane and spaced from the plane of

horizontal symmetry.

  The device of the invention constitutes an afocal optical system producing an inversion of the image of the light source after concentration at the focal point of the lens thus formed. When looking at the projector from the outside at a normal viewing angle, the inside of the projector is blocked by the cover and

  the aspect obtained is that of an opaque glass.

  According to one embodiment of the invention, the cover is

  colored, preferably the body color of the vehicle.

  Advantageously, in order to avoid image inversion and to be able to use the device on an existing projector, the invention provides that the optical element is attached to an optical element.

identical but without cache.

  Preferably, the optical element or elements have planar faces orChogonal to the cylindrical inlet and outlet faces. Of

  preferably, at least the planar faces are polished.

2828152:

  The invention will be clearly understood on reading the description

  following of exemplary embodiments, with reference to the appended drawing in which: FIG. 1 is a schematic perspective view of a device according to an exemplary embodiment of the invention and FIG. 2 is a schematic view in vertical section of a

  variant of part of the device in FIG. 1.

  The device shown in Figure 1 consists of two lenses A and B joined and arranged in this order between the light sources (not shown) of the projector and the glass;

  (also not shown) of this projector.

  The lens A has a cylindrical entry face E1, of radius of curvature R. and an exit face E2, of equal radius of curvature, symmetrical of the face E1 with respect to the median plane

  vertical of the lens passing through the horizontal median axis XX '.

  The distance between this axis XX 'and the top of the faces E1 and E2 is respectively equal to 2R. Lens A further comprises four

  lateral faces L which are flat and preferably polished.

  Lens A produces a simple inversion of the image of the sources

  of the projector and constitutes an afocal system.

  The lens B is identical to the lens A but comprises in its vertical median plane a cover C, plane spaced from the horizontal plane of symmetry of the lens. The cover C may for example consist of an insert around which the lens is molded and which is preferably colored at least on its face facing the window. The light rays emerging from the lens: A through the face E2 penetrate into the lens B through the face E3 and exit into the lens B through the face E4 after having undergone a new reversal. The image at infinity P of the light sources is therefore identical to that obtained without the interposition of the device constituted by the lenses A and B. In the case of original equipment of the projector, only the lens B is necessary, by symmetrically adapting to a horizontal plane the distribution of the beams of

different light sources.

  The cover C is arranged at a distance a from the horizontal plane of symmetry which, relative to the distance MF between the top of the exit face E4 and the vertical plane of symmetry, defines the angle at which the emerging rays are visible and effective. . In a vision above the plane passing through the vertex M and the end of the cover C, only the cover C and the horizontal faces L are visible. The image of the cover C reflected in the polished horizontal face L is also seen, which accentuates the opaque aspect, preferably colored, which the observer observes looking at the projectors turned off with the eyelash located

above the plane in question.

  The lens B. associated or not with the lens A, can be multiplied to cover a large part of the opening of the projector. A multiplication of lenses B can be carried out in a single linear piece, as shown in FIG. 2. If

  necessary, the bar G thus formed can be bent.

  The flat faces, seen by the observer, can also be colored.

Claims (8)

claims   1. device for masking automotive vehicle lighting projectors, CaraCtris in that it comprises at least one transparent optical element (B) interposed on the path of light rays between the sources of light and the glass of the projector, said optical element () comprising a cylindrical entry face (1) with radius R and a cylindrical exit face (E,) with radius R symmetrical with the entry face (relative to a vertical midian plane arranged at a distance 2R input (and output (E,) faces, a cover (C) both disposed in said media plane   vertical and Acartd of the plane of symmetry borizontal.   13 2. Device according to claim 1, characterized in that the cover (C) is colored, preferably the   color of the body of the vehicle.   3. Gelon device one of claims 1 and 2,   characterized in that 1 {l @ <optical ent (B) is attached to a   The optical element (A) is identified but has a cover (6).   4. DiGpoGitif according to one of claims 1 3,   Characterized in that the optical element or elements (B, A) have flat faces () orChogonal with cylindrical entry faces (, E,) and output (, E).   5. Device according to claim 4,   caactris in that at least leG flat faces () are polished.   6. oiGoGiLif Gelon Une deG CevendicatioG 4 et s,   caracLriG in that leG faceG planes () GOnt coloreG. AT: :   7. Device according to one of claims 1 to 6,   characterized in that the optical element (B, A) is associated with a   plurality of identical optical elements (B, A).   s 8. Device according to claim 7, characterized in that the optical elements (B, A) are associated