ADB vehicle lamp projection lens with large field of view and high light efficiency, vehicle lighting system and vehicle

Abstract

The application relates to the technical field of illumination, in particular to a large-view-field high-luminous-efficiency ADB vehicle lamp projection lens, a vehicle illumination system and a vehicle, which sequentially comprise, from the object side to the image side along the optical axis direction, a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, and a diaphragm located in front of the first lens; the total length TTL of the projection lens and the focal length EFL satisfy TTL / EFL<2.4; wherein TTL<63mm, EFL=30-35mm, the F number is between 0.6 and 0.8; the full field of view is 50-70 DEG, so as to adapt to large-area light distribution with a transverse image height greater than 30mm; the three-piece optical system realizes large-image-height and large-view-field projection; the projection lens is compact and has a large aperture, the total length is below 63mm, the F number reaches 0.73, is suitable for large-area light distribution ADB systems, guarantees the road anti-dazzling function of the ADB matrix type headlamp, closes the light area of the opposite driver's eye position during driving, does not cause visual fatigue of the driver due to long-time dazzling, and guarantees the illumination area of other positions.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and in particular to a large field-of-view, high-efficiency ADB vehicle headlight projection lens, a vehicle lighting system, and a vehicle. Background Technology

[0002] With the increasing application of intelligent sensing and intelligent driving technologies in the automotive field, the safety value of headlight systems, as the core visual guarantee for nighttime driving, is becoming increasingly prominent. Headlight functionality has evolved from basic lighting needs to adaptive high beam (ADB) systems with environmental perception capabilities, and is further evolving towards intelligence. The ADB system uses onboard cameras / radar to sense vehicles and pedestrians ahead, dynamically controlling the LED light source to create dark areas in corresponding zones, ensuring the driver's visibility while avoiding glare for other road users.

[0003] With the development of automotive intelligence, the industry has put forward higher requirements for the comprehensive performance of headlight optical systems. Vehicle headlights need to take into account the core indicators of miniaturization, large field of view, and high luminous efficacy (large numerical aperture NA) in order to adapt to the optical characteristics of high-power LED light sources (typical 1mm×1mm to 3mm×3mm light-emitting surface, wide light-emitting angle).

[0004] To meet the requirements of ADB systems for light distribution accuracy and response speed, various projection lens solutions have been proposed in the prior art. For example, Chinese invention patent CN112628682A discloses a projection lens, system, and vehicle for LED light sources, which adopts a structure of two plastic lenses and one glass lens (a total of three lenses). It corrects aberrations through a hybrid configuration of plastic aspherical and glass materials to achieve the purpose of large aperture and high image quality.

[0005] However, the existing solutions mentioned above still have the following shortcomings in practical applications: (1) The field of view of this scheme is small, with a full angle of only 8°. In the ADB system, in order to achieve full coverage of the multi-lane and curved areas ahead, it is usually necessary to combine and splice multiple narrow field of view projection modules, which results in a complex system structure, high cost and increased size, making it difficult to adapt to the limited spatial envelope constraints of modern car headlights; (2) It is suitable for high-pixel LED light sources, but cannot be compatible with conventional LED arrays. Currently, mainstream ADB systems still widely use conventional LED arrays to achieve wide-area lateral light distribution. If this solution is adopted, additional optical conversion devices or customized modifications to the LED light source are required, which significantly increases system cost and development cycle. Therefore, under the limited spatial envelope constraint of automotive headlights (typical lamp cavity depth of about 100mm), achieving a large field of view and large image height projection lens with an FOV of over 60° and an image height of over 30mm is a common technical challenge currently faced by the industry. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an ADB vehicle headlight projection lens, vehicle lighting system and vehicle, which achieves a large field of view and high luminous efficiency through an optical system consisting of one glass lens and two plastic lenses, with excellent manufacturability, small size and low cost.

[0007] The technical solution adopted by this invention to solve its technical problem is: a large field of view and high luminous efficiency ADB vehicle headlight projection lens, which includes, along the optical axis from the object side to the image side, the following components in sequence: The first lens has positive optical power. Both the object side and the image side of the first lens are aspherical. It is placed near the object side and bears the main positive optical power. The aspherical surface can be achieved by injection molding. While controlling the cost, it corrects the spherical aberration and primary coma of the system. The second lens has negative optical power. Both the object side and the image side of the second lens are aspherical. As a negative optical power element, its dispersive characteristics form a complementary achromatic combination with the glass lens, and the aspherical surface shape suppresses off-axis aberrations in a large field of view. The third lens has positive optical power. Its object side is aspherical, and its image side is flat. It is placed near the image side and is responsible for image quality refinement. Its low coefficient of thermal expansion and high refractive index uniformity ensure the imaging stability of the system in the automotive-grade operating temperature range (-40℃ to +85℃). The aperture stop, located in front of the first lens, forms the object-side telecentric optical path; The total system length (TTL) and focal length (EFL) of the projection lens satisfy the following condition: TTL / EFL < 2.4; Among them, TTL < 63mm, EFL = 30-35mm, and F number is between 0.6 and 0.8; The projection lens has a full field of view of 50° to 70° to accommodate light distribution in large areas with a horizontal image height greater than 30mm. Employing a three-element optical system consisting of one glass lens and two plastic lenses, it achieves large image height and wide field of view projection. The projection lens is compact and has a large aperture, with a total length of less than 63mm and an F-number of 0.73, making it suitable for large-area light distribution ADB systems. At a spatial frequency of 1lp / mm, the MTF within a 0.7 field of view is greater than 0.5, ensuring the road anti-glare function of the ADB matrix headlights. When driving, it closes the light zone at the eye position of oncoming drivers, while preventing drivers from experiencing glare and visual fatigue over a long period of time, and ensuring illumination areas in other locations.

[0008] Furthermore, the first lens is a PC lens with a refractive index of 1.5 to 1.7 and an Abbe number of 28 to 32. The distance between the aperture stop and the object side surface of the first lens is 6.5 to 7.5 mm.

[0009] Furthermore, the second lens is a PMMA lens with a refractive index of 1.4 to 1.5 and an Abbe number of 60 to 65.

[0010] Furthermore, the third lens is a glass lens with a refractive index of 1.4 to 1.6 and an Abbe number of 60 to 75.

[0011] Furthermore, the object-side surface of the first lens has a radius of curvature of 35–45 mm and a center thickness of 9–13 mm; the image-side surface of the first lens has a radius of curvature of -240–-250 mm and a center thickness of 9–13 mm. The object-side radius of curvature of the second lens is -16 to -18 mm, and the center thickness is 7 to 9 mm; the image-side radius of curvature of the second lens is -23 to -26 mm, and the center thickness is 0.7 to 1 mm. The object-side radius of curvature of the third lens is 20–23 mm, and the center thickness is 24–27 mm; the image-side radius of curvature of the third lens is 0 mm, and the center thickness is 3–5 mm.

[0012] The center thickness of the aperture is -10 to -4 mm.

[0013] Furthermore, when the F-number of the projection lens is 0.73, the NA is 0.68.

[0014] Furthermore, a fourth lens is provided between the first lens and the second lens. The fourth lens is a high Abbe number glass lens with a back cutoff (BFL) of 25–30 mm.

[0015] A vehicle lighting system includes a large field-of-view, high-efficiency ADB vehicle headlight projection lens as described in any one of the above claims and an LED light source array. The aperture is disposed in front of the object side of the projection lens, and the projection lens and the aperture form a telecentric optical path on the object side. This is to ensure that the light emitted from different light-emitting positions in the LED light source array does not change its imaging position on the image plane when the exit angle changes near the aperture position, thereby ensuring the light distribution consistency of the horizontally arranged LED array under a large field of view and avoiding irregular light spots or color difference stripes at the edges of the ADB dark area.

[0016] Furthermore, the LED light source array is arranged horizontally, and its array shape is selected from any one of rectangle, sector or trapezoid.

[0017] A vehicle including a vehicle lighting system according to any one of the preceding claims.

[0018] The beneficial effects of this invention are: (1) A three-element optical system consisting of one glass lens and two plastic lenses is used to achieve large image height and large field of view projection; (2) The projection lens is compact and has a large aperture, with a total length of less than 63mm and an F number of 0.73. It is suitable for large area light distribution ADB systems. At a spatial frequency of 1 lp / mm, the MTF in the 0.7 field of view is greater than 0.5. (3) It ensures the anti-glare function of the ADB matrix headlights, turns off the light zone at the eye position of the oncoming driver when driving, and does not cause the driver to be glared for a long time and cause visual fatigue, while ensuring the lighting area in other positions. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is the field distortion diagram of the present invention; Figure 3 This is a graph of the transfer function (MTF) of this invention; Figure 4 This is the vertical axis color difference diagram of the present invention; Figure 5 This is the relative illumination curve of the present invention; Figure 6 This is a schematic diagram of the LED array of the present invention; Figure 7 This is a comparison diagram of the ADB anti-glare effect of the present invention and the light pattern effect under normal conditions without oncoming vehicles; In the diagram: 1. First lens; 2. Second lens; 3. Third lens; 4. Aperture. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0022] Example 1: like Figures 1-5 As shown, a large field-of-view, high-efficiency ADB vehicle headlight projection lens comprises, along the optical axis from the object side to the image side, the following components: The first lens 1 has positive optical power. It is made of high-refractive-index, low-dispersion PC (polycarbonate) material with a refractive index of 1.5–1.7 and an Abbe number of 28–32. The object-side radius of curvature of the first lens 1 is 35–45 mm, and its center thickness is 9–13 mm. The image-side radius of curvature of the first lens 1 is -240–-250 mm, and its center thickness is 9–13 mm. The PC lens of the first lens 1 is placed near the object side and bears the main positive optical power of the system. Its high refractive index and low Abbe number (high dispersion) characteristics contribute a large positive chromatic aberration on the object side, forming a complementary chromatic aberration correction with the high Abbe number (low dispersion) of the PMMA negative lens of the second lens 2. At the same time, both the object-side and image-side surfaces of the first lens 1 are aspherical, and the aspherical surface shape can be achieved by injection molding, which can effectively compensate for spherical aberration, coma, and astigmatism of the system, thereby enabling the overall image quality of the system to reach a high level.

[0023] The second lens 2 has negative optical power. The material of the second lens 2 is PMMA (polymethyl methacrylate), which has low refractive index and high dispersion. Its refractive index is 1.4 to 1.5 and its Abbe number is 60 to 65. The radius of curvature of the object side of the second lens 2 is -16 to -18 mm and the center thickness is 7 to 9 mm. The radius of curvature of the image side of the second lens 2 is -23 to -26 mm and the center thickness is 0.7 to 1 mm. The second lens 2 is placed behind the PC lens (in the middle position). Its high Abbe number (low dispersion) and the low Abbe number of the first lens 1 form a complementary chromatic aberration correction. Both the object side and the image side of the second lens 2 are aspherical. The aspherical surface shape suppresses off-axis aberrations in a large field of view.

[0024] The third lens 3 has positive optical power. It is a glass lens located near the image side and is made of a low-refractive-index, high-dispersion material with a refractive index of 1.4–1.6 and an Abbe number of 60–75. The radius of curvature of the object side of the third lens 3 is 20–23 mm, and its center thickness is 24–27 mm. The radius of curvature of the image side of the third lens 3 is 0 mm, and its center thickness is 3–5 mm. The object side of the third lens 3 is aspherical, while its image side is spherical (plane), which is responsible for image quality refinement. Its low coefficient of thermal expansion and high refractive index uniformity ensure the imaging stability of the system within the automotive-grade operating temperature range (-40℃ to +85℃). The use of glass in this position avoids plastic aging and yellowing, extending the lifespan of the headlight.

[0025] Aperture 4, located in front of the first lens 1, forms a telecentric optical path on the object side. The distance between aperture 4 and the object side surface of the first lens 1 is 6.5–7.5 mm. The center thickness of aperture 4 is -10 to -4 mm, which ensures that changes in the emission angle of the LED light source near the aperture position do not affect the image plane position, thereby ensuring consistent light distribution of horizontally arranged LEDs under a large field of view and avoiding irregular light spots in the ADB dark area. Through the above architecture and material combination, spherical aberration, coma, field curvature, distortion and chromatic aberration can be effectively reduced, and requirements such as large aperture and large field of view can be achieved. The total system length TTL and focal length EFL of the projection lens meet the following conditions: TTL / EFL < 2.4; where TTL < 63mm and EFL = 30~35mm. Under the constraint of a typical lamp cavity depth of 100mm, a compact arrangement can be achieved, which is convenient for vehicle lamp structure integration.

[0026] Furthermore, the total system length (TTL) refers to the total optical length from the vertex of the object side of the first lens 1 to the image plane. It includes all optical elements: the first lens 1, the second lens 2, the third lens 3, the aperture 4, and the air gaps between them, ultimately reaching the image plane. Therefore, TTL is the total axial length of this complete combination of the four elements plus the image plane.

[0027] The F-number of the projection lens is between 0.6 and 0.8. In this embodiment, when the F-number is 0.73, the numerical NA is 0.68. With the low F-number and high NA design, the large-angle emitted light from the LED can be collected efficiently, improving the light energy utilization rate. The projection lens has a full field of view of 50° to 70°, which is about 4 to 8 times that of existing vehicle headlight projection solutions (typically 8°-15°). It can cover the entire front projection area required by a single ADB module, realizing a system-level simplification of replacing multiple lenses with a single lens. With an image height greater than 30mm, it can fully cover the imaging requirements of horizontally arranged LED arrays, with a single lens corresponding to an entire ADB projection channel; it is suitable for large-area light distribution with a horizontal image height (such as corresponding to a 22-LED array) greater than 30mm, and can achieve an MTF > 0.5 within 0.7 field of view at a spatial frequency of 1 lp / mm in almost all fields of view, with a back cutoff (BFL) of 3-8mm, and the system length is also effectively shortened.

[0028] The system parameters for this embodiment 1 are shown in Table 1.

[0029] Table 1 System Parameters

[0030] The surface parameters of this embodiment are shown in Table 2.

[0031] Table 2 Surface Parameters of Example 1

[0032] The above embodiments can achieve the following indicators: a) The system has an F-number of 0.73 and a field of view of ±30° (60° in total). It is suitable for large-area light distribution with a horizontal image height of more than 30mm (such as for a 22-LED array). It can achieve an MTF of >0.5 within 0.7 at a spatial frequency of 1 lp / mm in almost all fields of view. The back focal length (BFL) can reach 4.65mm. The system length is also effectively shortened, achieving a total length TTL to focal length EFL ratio of TTL / EFL = 1.6. b) Distortion control: such as Figure 2 The field curvature distortion diagram of Example 1 shows the degree of deformation between the projected pattern and the original image. The horizontal axis represents the distortion ratio, and the vertical axis represents the relative field of view. The distortion can be kept within 8.6% across the entire field of view, which meets the distortion threshold of <15% for automotive-grade ADB systems. c) Image sharpness: such as Figure 3 The graph shows the MTF (Mean Transfer Function) curve of Example 1. This graph reflects the projection performance under different fields of view. The horizontal axis is the field of view angle, in degrees (line pairs per mm). The higher the value, the more details of the object. The vertical axis is the MTF value. The higher the value, the higher the contrast of the pattern. This graph shows that the MTF value reaches above 0.5 at a frequency of 1 lp / mm within a field of view of 0.7, indicating that this example has good imaging clarity in the key field of view. d) Color difference correction: such as Figure 4The chromatic aberration diagram of Example 1 reflects the width of the color border of the imaging pattern, where the horizontal axis represents the chromatic aberration value and the vertical axis represents the relative value of the field of view. Due to the low specific gravity of PC and the excessive dispersion of the PMMA+glass combination, the second-order spectrum is reversed, so the blue light is centered, which can eliminate part of the chromatic aberration. Specifically: the anomalous dispersion characteristics of the PC lens of the first lens 1 in the 480nm blue light band are addressed by the combination of the first lens 1 (PC material, low Abbe number, high dispersion), the second lens 2 (PMMA material, high Abbe number, low dispersion), and the third lens 3 (glass, high Abbe number). The first lens 1 contributes a large positive chromatic aberration on the object side, forming a complementary chromatic aberration correction with the negative lens of the second lens 2. Meanwhile, due to the relatively low optical power of the first lens 1 and the high dispersion intensity of the combination of the second lens 2 and the third lens 3, the second-order spectral direction of the three-piece hybrid material system is reversed. This manifests as blue light (486nm) located in the center of the focal point, with green light (587.6nm) and red light (656nm) symmetrically distributed on either side. This chromatic aberration distribution characteristic is beneficial for controlling the color fringing at the edge of the ADB dark area under a large field of view, and the light distribution synthesis of the 22 LED array can be averaged out by the telecentric integration, having no significant impact on the final road surface light pattern.

[0033] e) Illumination uniformity: such as Figure 5 The relative illuminance curve of Example 1 reflects the illuminance reduction caused by vignetting in each field of view. The horizontal axis is the field of view angle and the vertical axis is the relative illuminance. The illuminance of the edge field of view relative to the center field of view reaches more than 88%, indicating that this example has excellent illuminance uniformity throughout the entire field of view.

[0034] A vehicle lighting system includes a large field-of-view, high-efficiency ADB vehicle headlight projection lens and an LED light source array. The aperture 4 is disposed in front of the object side of the projection lens, and the projection lens and the aperture 4 form a telecentric optical path on the object side. This is to ensure that the light rays from different emission positions in the LED light source array do not change their imaging position on the image plane when the emission angle near the aperture 4 changes, thereby ensuring the light distribution consistency of the horizontally arranged LED array under a large field of view and avoiding irregular light spots or color difference stripes at the edges of the ADB dark area.

[0035] Among them, such as Figure 6 As shown, the LED light source array is arranged horizontally, and its array shape is selected from any one of rectangle, sector or trapezoid, preferably trapezoid.

[0036] The horizontal LED light source array has consistent light distribution, and the aperture 4 is placed in front to form a telecentric optical path on the object side. This ensures that changes in the emission angle of the LED light source near the aperture position do not affect the image plane position, thus guaranteeing the consistency of light distribution of the horizontally arranged LED light source array in a large field of view. This avoids irregular light spots or chromatic aberration stripes at the edge of the ADB dark area and improves the dark area quality of the adaptive high beam.

[0037] The projection lens has a full field of view of ≥50°, enabling a single projection lens to cover the entire front projection area of ​​the LED light source array, achieving system-level integration where a single lens replaces multiple lenses.

[0038] The LED light source array contains 22 LEDs, is compatible with image heights greater than 30mm, and the projection lens has a full field of view of 60°, covering the light distribution projection area of ​​all 22 LEDs.

[0039] like Figure 7 As shown, the comparison between the ADB anti-glare effect of Example 1 (top image) and the normal light pattern effect without oncoming vehicles (bottom image) reflects the projection system's ability to create a dark area and achieve anti-glare after some LEDs are turned off. In the figure, the horizontal axis represents the far-field horizontal angle position (°), the vertical axis represents the far-field vertical angle position (°), and the grayscale value represents the relative illumination distribution.

[0040] like Figure 7 As shown, when the vehicle-mounted sensor detects an oncoming vehicle or pedestrian at a specific location ahead, the system, based on their angular position (exampleed in the figure as a horizontal range of +2° to +7°), shuts off the driving current of the corresponding LED, creating a dark area with a relative illuminance of less than 0.5 lx within this range, while maintaining normal illumination on both sides of the dark area. The dark area in the figure has clear boundaries and a regular shape, without any light spot diffusion or color difference stripes, indicating that the three-piece telecentric architecture of this invention can achieve accurate mapping between the LED array's shutdown position and the far-field dark area under a large field of view, meeting the ADB system's requirement for sharp edges in the dark area.

[0041] A vehicle includes a vehicle lighting system, wherein the headlight module can be applied to the vehicle headlights as a core optical component of the ADB adaptive high beam system.

[0042] Example 2: The difference from Embodiment 1 is that a fourth lens is provided between the first lens 1 and the second lens 2, forming a 4-piece structure.

[0043] The fourth lens is a high Abbe number glass lens. Due to its high Abbe number (low dispersion) characteristics, its addition can provide the system with additional positive power without significantly increasing the chromatic aberration burden, thereby extending the back focal length (BFL) to between 25mm and 30mm.

[0044] The longer back clip provides ample installation space for the LED light source and its heat dissipation structure, which is beneficial for the heat dissipation design of high-power LEDs and avoids light decay and shortened lifespan caused by excessively high LED junction temperature.

[0045] In this embodiment, the core optical performance, such as F-number, field of view, image height, and MTF, remains basically the same as in Embodiment 1, namely, the F-number is 0.73, the full field of view is ±30° (full angle 60°), the suitable image height is greater than 30mm, and the MTF is greater than 0.5 within a 0.7 field of view at a spatial frequency of 1lp / mm. The addition of the fourth lens further optimizes the system's aberration correction capability, resulting in a slight improvement in the MTF value compared to Embodiment 1 in some fields of view.

[0046] In this embodiment, the aperture stop is still located in front of the object side of the first lens 1 (at a distance of 6.695mm), forming a telecentric optical path on the object side, ensuring the light distribution consistency of the transverse LED array.

[0047] In this embodiment, the high Abbe number crown glass of the fourth lens is selected from the FK series (fluorine crown glass) or similar low-dispersion glass materials. Its anomalous dispersion characteristics complement the conventional dispersion of the PC material, further suppressing the residual amount of the second-order spectrum. However, the addition of the fourth lens increases the total system length, with a TTL of approximately 68 mm and a TTL / EFL ratio of approximately 2.15, still satisfying the constraint that TTL / EFL < 2.4.

[0048] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A wide field-of-view, high-efficiency ADB (Advanced Dependent Bridge) automotive headlight projection lens, characterized in that: Along the optical axis from the object side to the image side, the following are included in sequence: The first lens (1) has positive optical power, and both the object side and the image side of the first lens (1) are aspherical. The second lens (2) has negative optical power, and both the object side and the image side of the second lens (2) are aspherical. The third lens (3) has positive optical power. The object side of the third lens (3) is aspherical, and the image side is planar. The aperture (4) is located in front of the first lens (1) and forms the object-side telecentric optical path; The total system length (TTL) and focal length (EFL) of the projection lens satisfy the following condition: TTL / EFL < 2.4; Among them, TTL < 63mm, EFL = 30-35mm, and F number is between 0.6 and 0.8; The projection lens has a full field of view of 50° to 70° to accommodate light distribution in large areas with a horizontal image height greater than 30mm.

2. The large field-of-view, high-efficiency ADB vehicle headlight projection lens according to claim 1, characterized in that: The first lens (1) is a PC lens with a refractive index of 1.5 to 1.7 and an Abbe number of 28 to 32. The distance between the aperture stop (4) and the object side surface of the first lens (1) is 6.5 to 7.5 mm.

3. The large field-of-view, high-efficiency ADB vehicle headlight projection lens according to claim 1, characterized in that: The second lens (2) is a PMMA lens with a refractive index of 1.4 to 1.5 and an Abbe number of 60 to 65.

4. The large field-of-view, high-efficiency ADB vehicle headlight projection lens according to claim 1, characterized in that: The third lens (3) is a glass lens with a refractive index of 1.4 to 1.6 and an Abbe number of 60 to 75.

5. The large field-of-view, high-efficiency ADB vehicle headlight projection lens according to claim 1, characterized in that: The object side of the first lens (1) has a radius of curvature of 35-45 mm and a center thickness of 9-13 mm; the image side of the first lens (1) has a radius of curvature of -240--250 mm and a center thickness of 9-13 mm. The object side radius of curvature of the second lens (2) is -16 to -18 mm, and the center thickness is 7 to 9 mm; the image side radius of curvature of the second lens (2) is -23 to -26 mm, and the center thickness is 0.7 to 1 mm. The object side of the third lens (3) has a radius of curvature of 20-23 mm and a center thickness of 24-27 mm; the image side of the third lens (3) has a radius of curvature of 0 mm and a center thickness of 3-5 mm. The center thickness of the aperture (4) is -10 to -4 mm.

6. The large field-of-view, high-efficiency ADB vehicle headlight projection lens according to claim 1, characterized in that: When the F-number of the projection lens is 0.73, the NA is 0.

68.

7. The ADB vehicle headlight projection lens with a large field of view and high luminous efficiency according to claim 1, characterized in that: A fourth lens is provided between the first lens (1) and the second lens (2). The fourth lens is a high Abbe number glass lens with a back cutoff (BFL) of 25-30 mm.

8. A vehicle lighting system, characterized in that: The invention includes a large field-of-view, high-efficiency ADB vehicle headlight projection lens and an LED light source array according to any one of claims 1 to 7. The aperture (4) is disposed in front of the object side of the projection lens. The projection lens and the aperture (4) form a telecentric optical path on the object side, so that the change in the emission angle of light from different light-emitting positions in the LED light source array near the position of the aperture (4) does not change its imaging position on the image plane, thereby ensuring the light distribution consistency of the horizontally arranged LED array under a large field of view and avoiding irregular light spots or color difference stripes at the edge of the ADB dark area.

9. The vehicle lighting system according to claim 8, characterized in that: The LED light source array is arranged horizontally, and its array shape is selected from any one of rectangle, sector or trapezoid.

10. A vehicle, characterized in that: Includes a vehicle lighting system according to any one of claims 8 to 9.

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