Headlight for a motor vehicle
The invention relates to a headlight for a motor vehicle. The headlight includes at least one light source and an optical system with a plurality of optical components to shape the light emitted by the at least one light source and to project it into the space outside the motor vehicle in such a way that a dipped beam distribution of the headlight, which has a light-dark boundary, is produced, and light portions located above this light-dark boundary in order to implement an OS function. The headlight further includes at least one refractive structure on at least one of the optical components and has a plurality of structural elements, the structure being set up to deflect light passing through the optical component into a region above the light-dark boundary in order to implement the OS function, at least one of the structural elements being of annular or partially annular design.
1 . A headlight for a motor vehicle, comprising:
at least one light source;
an optical system with a plurality of optical components including a primary optical system and a projection lens, the projection lens defining an optical axis, the plurality of optical components being configured to shape the light emitted by the at least one light source and to project it into the space outside of the motor vehicle in such a way that a dipped beam distribution of the headlight is produced, which has a light-dark boundary and light components arranged above this light-dark boundary in order to implement an overhead sign (OS) function; and
a refractive structure and a Fresnel structure, which are arranged on a common surface of the projection lens, the refractive structure and the Fresnel structure each including a plurality of structural elements, the plurality of structural elements comprising a plurality of annular steps, wherein each of the plurality of annular steps includes a useful flank and an interference flank,
wherein the useful flank of the refractive structure is a continuous extension of the useful flank of the Fresnel structure and are angled identically to each other,
wherein the interference flank of the refractive structure defines a first angle of incidence with respect to the optical axis of the projection lens, and wherein the interference flank of the Fresnel structure defines a second angle of incidence with respect to the optical axis of the projection lens, the first angle of incidence being zero, the second angle of incidence being greater than the first angle of incidence, wherein the refractive structure is disposed along a sub-portion of the common surface of the projection lens, such that the refractive structure is configured to deflect light passing through the projection lens into a region above the light-dark boundary in order to implement the OS function, wherein at least one of the structural elements of the refractive structure is annular or partially annular.
2 . The headlight according to claim 1 , wherein a first of the annular or partially annular structural elements has a smaller diameter than a second of the annular or partially annular structural elements.
3 . The headlight according to claim 1 , wherein at least one of the structural elements is designed partially annular in a manner such that it extends over less than 360° in the circumferential direction over a sector of a circle.
4 . The headlight according to claim 1 , wherein the structural elements of the at least one refractive structure have a width of between 0.5 mm and 1.0 mm.
5 . The headlight according to claim 1 , wherein at least one of the optical components includes an aspherical lens, the refractive structure being integrated into the aspherical lens.
6 . The headlight according to claim 1 , wherein the primary optical system is configured to shape the light emitted by the at least one light source in such a way that an extended light distribution is produced, and wherein the projection lens is configured to convert the extended light distribution produced by the primary optical system into a light distribution corresponding to the dipped light distribution of the headlight.
7 . The headlight according to claim 1 , wherein the refractive structure is integrated into the coupling side or the decoupling side of the projection lens.
8 . A method of manufacturing an optical component of the headlight according to claim 1 , wherein the refractive structure is arranged on the optical component and is configured to deflect light passing through the optical component into a region above the light-dark boundary in order to implement the OS function, wherein the optical component is manufactured from plastic by injection molding, wherein the refractive structure is also produced during the injection molding.