A lighting apparatus for vehicles with a number of semiconductor-based light sources and a projection device for generating the specified light distribution with a cut-off line. The projection device features a correction device with at least two lenses. The surface of at least one of the lenses is
A lighting apparatus for vehicles with a number of semiconductor-based light sources and a projection device for generating the specified light distribution with a cut-off line. The projection device features a correction device with at least two lenses. The surface of at least one of the lenses is designed as a diffractive lens surface for achromatization in a visible wavelength range. The two lenses are made from different lens materials. The surfaces of at least two lenses are designed as refractive lens surfaces that have their optical power calculated based on a temperature range and/or expansion coefficient of the lens material of at least two lenses such that adding the optical power of the lenses yields a predefined total optical power of the correction device.
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1. A lighting apparatus for vehicles comprising: a plurality of semiconductor-based light sources;a projection device for generating a specified light distribution;a correction device of the projection device, said correction device having at least two lenses, wherein at least two of said at least t
1. A lighting apparatus for vehicles comprising: a plurality of semiconductor-based light sources;a projection device for generating a specified light distribution;a correction device of the projection device, said correction device having at least two lenses, wherein at least two of said at least two lenses are made from different materials from one another, where the surface of at least one of the lenses is designed as a diffractive lens surface featuring a Fresnel structure for achromatization in a visible wavelength range,wherein the surfaces of at least two lenses are designed as refractive lens surfaces that have their optical power (φref1, φref2) calculated based on at least one of a temperature range and expansion coefficient of the lens material of at least two lenses such that adding the optical power (φref1, φref2, φdiff1, φdiff2) of the lenses yields a predefined total optical power (φ) of the correction device. 2. The lighting apparatus in accordance with claim 1, wherein the refractive lens surface is designed such that the correction device is athermal. 3. The lighting apparatus in accordance with claim 1, wherein the refractive lens surface is designed such that it is aspherical or spherical. 4. The lighting apparatus in accordance with claim 1, wherein the diffractive lens surface is structured such that the correction device is achromatic. 5. The lighting apparatus in accordance with claim 1, wherein the correction device is designed as a secondary optical component that is assigned to the light sources arranged in a matrix structure and also to the corresponding primary optical components that are also assigned to these light sources. 6. The lighting apparatus in accordance with claim 1, wherein a ratio of the optical power (φref1) for the refractive lens surface of the first lens to the optical power (φref2) for the refractive lens surface of at least one of the second lens and a ratio of the optical power (φdiff1) for the diffractive lens surface of the first lens to the optical power (φdiff2) for the diffractive lens surface of the second lens is formed through substitution in an Abbe equation and an athermalization equation, wherein a ratio of the optical power (φref1) for the refractive lens surface of the first lens to the optical power (φdiff1) for the diffractive lens surface of the first lenses and a ratio of the optical power (φref2) for the refractive lens surface of the second lens to the optical power (φdiff2) of the diffractive lens surface of the second lens is formed through substitution in the Abbe equation and the athermalization equation, ensuring that an equation for the total optical power (φ) can be solved based on the individual optical power values (φref1, φref2, φdiff1, φdiff2) of the refractive lens surfaces and diffractive lens surfaces. 7. The lighting apparatus in accordance with claim 1 wherein the correction device is assigned each of the light sources arranged in a matrix structure as a primary optical component, where a secondary optical component assigned to the same light sources is arranged in front of the primary optical components in the main direction of the beam. 8. A lighting apparatus for vehicles comprising: a plurality of semiconductor-based light sources;a projection device for generating a specified light distribution;a correction device of the projection device, said correction device having at least two lenses, wherein at least two of said at least two lenses are made from different materials from one another, where the surface of at least one of the lenses is designed as a diffractive lens surface for achromatization in a visible wavelength range,wherein the surfaces of at least two lenses are designed as refractive lens surfaces that have their optical power (φref1, φref2) calculated based on at least one of a temperature range and expansion coefficient of the lens material of at least two lenses such that adding the optical power (φref1, φref2, φdiff1, φdiff2) of the lenses yields a predefined total optical power (φ) of the correction device, andwherein a first lens and a second lens each feature a diffractive lens surface and a refractive lens surface. 9. The lighting apparatus in accordance with claim 8, wherein the sides of the first lens and second lens facing toward one another are directly adjacent and the surface of the first lens facing toward the light source and the surface of the second lens facing away from the light source feature a diffractive lens surface and refractive lens surface. 10. A lighting apparatus for vehicles comprising: a plurality of semiconductor-based light sources;a projection device for generating a specified light distribution;a correction device of the projection device, said correction device having at least two lenses, wherein at least two of said at least two lenses are made from different materials from one another, where the surface of at least one of the lenses is designed as a diffractive lens surface featuring a Fresnel structure for athermalization;wherein the lens surface of at least two lenses is designed as a refractive lens surface for achromatization in a visible wavelength range,wherein the optical power of the refractive lens surface is calculated based on at least one of a temperature range and expansion coefficient of the lens material of at least two lenses such that adding the optical power of the lenses yields a predefined total optical power of the correction device. 11. The lighting apparatus in accordance with claim 10, wherein the refractive lens surface is designed such that the correction device is athermal. 12. The lighting apparatus in accordance with claim 10, wherein the refractive lens surface is designed such that it is aspherical or spherical. 13. The lighting apparatus in accordance with claim 10, wherein the diffractive lens surface is structured such that the correction device is achromatic. 14. The lighting apparatus in accordance with claim 10, wherein the correction device is designed as a secondary optical component that is assigned to the light sources arranged in a matrix structure and also to the corresponding primary optical components that are also assigned to these light sources. 15. The lighting apparatus in accordance with claim 10, wherein a ratio of the optical power for the refractive lens surface of the first lens to the optical power for the refractive lens surface of at least one of the second lens and a ratio of the optical power for the diffractive lens surface of the first lens to the optical power for the diffractive lens surface of the second lens is formed through substitution in an Abbe equation and an athermalization equation, wherein a ratio of the optical power for the refractive lens surface of the first lens to the optical power for the diffractive lens surface of the first lenses and a ratio of the optical power for the refractive lens surface of the second lens to the optical power of the diffractive lens surface of the second lens is formed through substitution in the Abbe equation and the athermalization equation, ensuring that an equation for the total optical power can be solved based on the individual optical power values of the refractive lens surfaces and diffractive lens surfaces. 16. The lighting apparatus in accordance with claim 10 wherein the correction device is assigned each of the light sources arranged in a matrix structure as a primary optical component, where a secondary optical component assigned to the same light sources is arranged in front of the primary optical components in the main direction of the beam. 17. A lighting apparatus for vehicles comprising: a plurality of semiconductor-based light sources;a projection device for generating a specified light distribution;a correction device of the projection device, said correction device having at least two lenses, wherein at least two of said at least two lenses are made from different materials from one another, where the surface of at least one of the lenses is designed as a diffractive lens surface for athermalization;wherein the lens surface of at least two lenses is designed as a refractive lens surface for achromatization in a visible wavelength range,wherein the optical power of the refractive lens surface is calculated based on at least one of a temperature range and expansion coefficient of the lens material of at least two lenses such that adding the optical power of the lenses yields a predefined total optical power of the correction device,wherein a first lens and a second lens each feature a diffractive lens surface and a refractive lens surface. 18. The lighting apparatus in accordance with claim 17, wherein the sides of the first lens and second lens facing toward one another are directly adjacent and the surface of the first lens facing toward the light source and the surface of the second lens facing away from the light source feature a diffractive lens surface and refractive lens surface.
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이 특허에 인용된 특허 (3)
Arriola Edmund W., Low weight, achromatic, athermal, long wave infrared objective lens.
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