Fish-eye 360-degree wide-angle high-definition 12 million-pixel vehicle-mounted lens

Abstract

The utility model provides a fisheye 360-degree wide-angle high-definition 12 million-pixel vehicle-mounted lens, particularly relates to the technical field of camera lenses, and is used for solving the problems that most existing vehicle-mounted lenses have certain compromise in the aspects of high resolution and wide visual angle, part of lenses have relatively large distortion although having relatively good field angles, and the image quality is poor. Or the imaging quality is reduced under the night vision function and complex light. The lens comprises a lens shell, and a first lens element, a second lens element, a third lens element, a fourth lens element, a diaphragm, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element, a cover and a lens barrel which are arranged in the lens shell and are sequentially arranged from an object side to an image side. According to the utility model, the aberration in an optical system is effectively corrected, the lens requirement of a 2K pixel level can be realized, and the special application requirements of diversification of different scenes, clear effect, good night vision effect, less interference under complex light and the like of the lens are met.

Description

A fisheye 360° wide-angle high-definition 12-megapixel automotive lens Technical Field

[0001] This utility model relates to the field of camera lens technology, specifically to a fisheye 360° wide-angle high-definition 12-megapixel vehicle lens. Background Technology

[0002] In the field of automotive cameras, most high-definition lenses currently on the market are standard or wide-angle lenses. While these lenses meet most basic image quality requirements, there is still room for improvement in optical characteristics, distortion correction, and image stability. Especially in harsh environments, such as the high-temperature, high-pressure environment of a car, finding a lens with excellent imaging capabilities, high-temperature resistance, and the ability to provide high-quality images is crucial. Most existing automotive lenses compromise on both high resolution and wide viewing angles; some lenses, while offering a good field of view, may suffer from significant distortion or experience image quality degradation in night vision and complex lighting conditions. Summary of the Invention

[0003] The purpose of this invention is to provide a fisheye 360° wide-angle high-definition 12-megapixel automotive lens, which can effectively correct aberrations in the optical system, achieve satisfactory optical characteristics and a wide total field of view and aperture, and meet the requirements of 2K pixel level lens. It can meet the special application requirements of different scenarios, such as clear effect, good night vision effect and less interference under complex lighting conditions.

[0004] The embodiments of this utility model are achieved through the following technical solutions:

[0005] A fisheye 360° wide-angle high-definition 12-megapixel automotive lens includes a lens housing and a first lens element, a second lens element, a third lens element, a fourth lens element, an aperture stop, a fifth lens element, a sixth lens element, a seventh lens element, and an eighth lens element arranged sequentially from the object side to the image side inside the lens housing, along with a cover and a lens barrel.

[0006] The first lens element is a meniscus lens; the second lens element is a meniscus lens; the third lens element is a meniscus lens; the fourth lens element is a meniscus lens; the aperture stop is the diameter that controls the aperture size; the fifth lens element is a biconvex lens; the sixth lens element is a meniscus lens; the seventh lens element is a biconvex lens; the eighth lens element is a meniscus lens;

[0007] The mirror surface of the fifth lens element mates with the object surface of the sixth lens element; the mirror surface of the seventh lens element mates with the object surface of the eighth lens element.

[0008] The first lens element, the second lens element, the third lens element, and the fourth lens element are all glass lens elements.

[0009] In some embodiments, the first lens element satisfies the following condition formula: Nd1≥1.91082, Vd1≥35.25, where Nd1 represents the d-ray refractive index of the first lens element material and Vd1 represents the d-ray Abbe constant of the first lens element material.

[0010] In some embodiments, the second lens element satisfies the following condition formula: Nd2≥1.72916, Vd2≥54.68, where Nd2 represents the d-ray refractive index of the second lens element material and Vd2 represents the d-ray Abbe constant of the second lens element material.

[0011] In some embodiments, the third lens element satisfies the following condition formula: Nd3≥2.0, Vd3≥30, where Nd3 represents the d-ray refractive index of the third lens element material and Vd3 represents the d-ray Abbe constant of the third lens element material.

[0012] In some embodiments, the fourth lens element satisfies the following condition formula: Nd4≥1.78179, Vd4≥37.09, where Nd4 represents the d-ray refractive index of the fourth lens element material and Vd4 represents the d-ray Abbe constant of the fourth lens element material.

[0013] In some embodiments, the fifth lens element satisfies the following condition formula: Nd5≥1.62041, Vd5≥60.34, where Nd5 represents the d-ray refractive index of the fifth lens element material and Vd5 represents the d-ray Abbe constant of the fifth lens element material.

[0014] In some embodiments, the sixth lens element satisfies the following condition formula: Nd6≥1.80518, Vd6≥60.34, where Nd6 represents the d-ray refractive index of the sixth lens element material and Vd6 represents the d-ray Abbe constant of the sixth lens element material.

[0015] In some embodiments, the seventh lens element satisfies the following condition formula: Nd7≥1.62041, Vd7≥60.34, where Nd7 represents the d-ray refractive index of the seventh lens element material and Vd7 represents the d-ray Abbe constant of the seventh lens element material.

[0016] In some embodiments, the eighth lens element satisfies the following condition formula: Nd8 ≥ 1.84666, Vd8 ≥ 25.46, where Nd8 represents the d-ray refractive index of the eighth lens element material and Vd8 represents the d-ray Abbe constant of the eighth lens element material.

[0017] In some embodiments, the distance S4 from the outermost point on the object side of the first lens element to the imaging surface must satisfy the following formula: total optical length S4 = 25.46 ± 0.3 mm.

[0018] In some embodiments, the lens housing is made of all-metal material.

[0019] In some embodiments, the total height of the lens assembly S2 is 21.26±0.3mm; the total height of the finished lens S3 is 21.95±0.3mm; the total height of the mechanism S5 is 23.75±0.3mm; the mechanical back focal length S6 is 4.2±0.1mm; and the optical back focal length S7 is 3.51±0.1mm.

[0020] In some embodiments, the fifth lens element and the sixth lens element are bonded together with optical adhesive; the seventh lens element and the eighth lens element are bonded together with optical adhesive.

[0021] In some embodiments, the outer sides of the first lens element and the eighth lens element are provided with a multilayer gradient refractive index film.

[0022] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0023] 1. This utility model consists of a lens housing and eight glass elements. The first to eighth lens elements are responsible for adjusting the refraction path of light, effectively correcting aberrations, and thus achieving a clear imaging effect. The aperture stop controls the diameter of light passing through the lens to optimize image quality. The fifth to seventh lens elements enhance the lens's wide-angle capability while ensuring distortion control at large field of view. The cap and lens barrel are responsible for fixing the various components and providing good sealing and structural support. The overall length of this lens is only 22.52mm, with a large aperture of f / 2.2, enabling stable operation in high-temperature environments and ensuring superior optical performance. The lens has a diagonal angle of view of 240°, while distortion is controlled at -98%, indicating good image uniformity and low distortion characteristics even at wide angles. In summary, this lens, through a carefully designed multi-lens structure and precise optical parameter matching, successfully achieves high-performance 2K resolution, a wide angle of view, excellent distortion resistance, and high-temperature stability, meeting the various special requirements of the automotive industry for high-performance automotive lenses. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 is a structural schematic diagram of a fisheye 360° wide-angle high-definition 12-megapixel vehicle lens provided in an embodiment of this utility model;

[0026] Figure 2 is a schematic diagram of the external dimensions of a fisheye 360° wide-angle high-definition 12-megapixel vehicle lens provided in an embodiment of this utility model;

[0027] Figure 3 is a schematic diagram of the imaging process of a fisheye 360° wide-angle high-definition 12-megapixel vehicle lens provided in an embodiment of this utility model;

[0028] Figure 4 is a field curvature curve diagram of a fisheye 360° wide-angle high-definition 12-megapixel vehicle lens provided in an embodiment of this utility model;

[0029] Figure 5 is a vertical axis chromatic aberration curve of a fisheye 360° wide-angle high-definition 12-megapixel automotive lens provided in an embodiment of this utility model.

[0030] Figure 6 is an axial chromatic aberration curve of a fisheye 360° wide-angle high-definition 12-megapixel automotive lens provided in an embodiment of this utility model;

[0031] Figure 7 is a distortion curve diagram of a fisheye 360° wide-angle high-definition 12-megapixel vehicle lens provided in an embodiment of this utility model;

[0032] Figure 8 is an MTF curve of a fisheye 360° wide-angle high-definition 12-megapixel automotive lens provided in an embodiment of this utility model.

[0033] Icons: 1. Lens housing; 2. Aperture stop; 3. Filter; L1. First lens element; L2. Second lens element; L3. Third lens element; L4. Fourth lens element; L5. Fifth lens element; L6. Sixth lens element; L7. Seventh lens element; L8. Eighth lens element. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Please refer to Figures 1-3. The main body of this embodiment is a fisheye 360° wide-angle high-definition 12-megapixel automotive lens, including a lens housing 1 and a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, an aperture 2, a fifth lens element L5, a sixth lens element L6, a seventh lens element L7, an eighth lens element L8 arranged sequentially from the object side to the image side inside the lens housing 1, along with a cover and a lens barrel.

[0040] The first lens element L1 is a meniscus lens; the second lens element L2 is a meniscus lens; the third lens element L3 is a meniscus lens; the fourth lens element L4 is a meniscus lens; the aperture stop 2 is the diameter controlling the aperture size; the fifth lens element L5 is a biconvex lens; the sixth lens element L6 is a meniscus lens; the seventh lens element L7 is a biconvex lens; and the eighth lens element L8 is a meniscus lens.

[0041] The mirror surface of the fifth lens element L5 mates with the object surface of the sixth lens element L6; the mirror surface of the seventh lens element L7 mates with the object surface of the eighth lens element L8.

[0042] The first lens element L1, the second lens element L2, the third lens element L3, and the fourth lens element L4 are all glass lens elements.

[0043] Furthermore, the first lens element L1 satisfies the following condition formula: Nd≥1.91082, Vd≥35.25, where Nd represents the d-ray refractive index of the material of the first lens element L1, and Vd represents the d-ray Abbe constant of the material of the first lens element L1.

[0044] Furthermore, the second lens element L2 satisfies the following condition formula: Nd≥1.72916, Vd≥54.68, where Nd represents the d-ray refractive index of the material of the second lens element L2, and Vd represents the d-ray Abbe constant of the material of the second lens element L2.

[0045] Furthermore, the third lens element L3 satisfies the following condition formula: Nd≥1.94595, Vd≥17.94, where Nd represents the d-ray refractive index of the material of the third lens element L3, and Vd represents the d-ray Abbe constant of the material of the third lens element L3.

[0046] Furthermore, the fourth lens element L4 satisfies the following condition formula: Nd≥1.78179, Vd≥37.09, where Nd represents the d-ray refractive index of the fourth lens element L4 material and Vd represents the d-ray Abbe constant of the fourth lens element L4 material.

[0047] Furthermore, the fifth lens element L5 satisfies the following condition formula: Nd≥1.62041, Vd≥60.34, where Nd represents the d-ray refractive index of the material of the fifth lens element L5, and Vd represents the d-ray Abbe constant of the material of the fifth lens element L5.

[0048] Furthermore, the sixth lens element L6 satisfies the following condition formula: Nd≥1.80518, Vd≥25.46, where Nd represents the d-ray refractive index of the material of the sixth lens element L6, and Vd represents the d-ray Abbe constant of the material of the sixth lens element L6.

[0049] Furthermore, the seventh lens element L7 satisfies the following condition formula: Nd≥1.62041, Vd≥60.34, where Nd represents the d-ray refractive index of the seventh lens element L7 material and Vd represents the d-ray Abbe constant of the seventh lens element L7 material.

[0050] Furthermore, the eighth lens element L8 satisfies the following condition formula: Nd≥1.84666, Vd≥23.78, where Nd represents the d-ray refractive index of the material of the eighth lens element L8, and Vd represents the d-ray Abbe constant of the material of the eighth lens element L8.

[0051] Furthermore, the distance S4 from the outermost point of the first lens element L1 on the object side to the imaging surface must satisfy the following formula: total optical length S4 = 25.46 ± 0.3 mm.

[0052] Furthermore, the lens housing 1 is an all-metal lens housing.

[0053] Furthermore, the total height of the lens assembly S2 is 21.26±0.3mm; the total height of the finished lens S3 is 21.95±0.3mm; the total height of the mechanism S5 is 23.75±0.3mm; the mechanical back focal length S6 is 4.2±0.1mm; and the optical back focal length S7 is 3.51±0.1mm.

[0054] In this embodiment, along the optical axis from the object side to the image side, within the lens housing 1: the object surface of the first lens element L1 has a mirror curvature radius of R1, and the mirror surface has a mirror curvature radius of R2; the object surface of the second lens element L2 has a mirror curvature radius of R3, and the mirror surface has a mirror curvature radius of R4; the object surface of the third lens element L3 has a mirror curvature radius of R5, and the mirror surface has a mirror curvature radius of R6; the object surface of the fourth lens element L4 has a mirror curvature radius of R7, and the mirror surface has a mirror curvature radius of R8. The radius of curvature of the mirror surface is R8; the radius of curvature of the object surface of the fifth lens element L5 is R9, and the radius of curvature of the mirror surface is R10; the radius of curvature of the object surface of the sixth lens element L6 is R10, and the radius of curvature of the mirror surface is R11; the radius of curvature of the object surface of the seventh lens element L7 is R12, and the radius of curvature of the mirror surface is R13; the radius of curvature of the object surface of the eighth lens element L8 is R13, and the radius of curvature of the mirror surface is R14.

[0055] Figures 4 to 8 are optical performance curves of this embodiment. Figure 4 is a field curvature curve, reflecting the change in focal position of the lens under different field of view (or image height); Figure 5 is a transverse chromatic aberration curve, represented by the wavelengths of commonly used F, d, and C light, in μm; Figure 6 is an axial chromatic aberration curve, represented by the wavelengths of commonly used F, d, and C light, in mm; Figure 7 is a distortion curve, representing the distortion magnitude under different field of view, in %; and Figure 8 is an MTF curve, representing the overall resolution level of an optical system.

[0056] In other embodiments, the fifth lens element L5 and the sixth lens element L6 are bonded together with optical adhesive to fill the air gap between them, thereby reducing axial chromatic aberration; the seventh lens element L7 and the eighth lens element L8 are bonded together with optical adhesive to fill the space gap between them, thereby reducing axial chromatic aberration and improving the image sharpness of the lens.

[0057] In some embodiments, the outer sides of the first lens element L1 and the eighth lens element L8 are provided with multiple layers of gradient refractive index film, thereby reducing glare caused by reflection of large incident angle light with an edge field of view >80°, improving the lens's ability to have a wide viewing angle, and reducing distortion.

[0058] This invention comprises a lens housing and eight glass elements. The first to eighth lens elements are responsible for adjusting the refraction path of light, effectively correcting aberrations to achieve clear imaging. The aperture controls the diameter of light passing through the lens to optimize image quality. The fifth to seventh lens elements enhance the lens's wide-angle capability while ensuring distortion control at large field of view. The cap and lens barrel secure the components and provide excellent sealing and structural support. The lens has an overall length of only 22.52mm, a large aperture of f / 2.2, and can maintain stable operation in high-temperature environments, ensuring superior optical performance. The lens has a diagonal angle of view of 240° while distortion is controlled at -98%, indicating good image uniformity and low distortion characteristics even at wide angles. In summary, this lens, through a carefully designed multi-lens structure and precise optical parameter matching, successfully achieves high-performance 2K resolution, a wide angle of view, excellent distortion resistance, and high-temperature stability, meeting the various special requirements of the automotive industry for high-performance automotive lenses.

[0059] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fisheye 360° wide-angle high-definition 12-megapixel automotive lens, characterized in that, The lens includes a lens housing (1) and a first lens element (L1), a second lens element (L2), a third lens element (L3), a fourth lens element (L4), an aperture stop (2), a fifth lens element (L5), a sixth lens element (L6), a seventh lens element (L7), and an eighth lens element (L8) arranged sequentially from the object side to the image side inside the lens housing (1), along with a cover and a lens barrel. The first lens element (L1) is a meniscus lens; the second lens element (L2) is a meniscus lens; the third lens element (L3) is a meniscus lens; the fourth lens element (L4) is a meniscus lens; the aperture stop (2) is the diameter that controls the aperture size; the fifth lens element (L5) is a meniscus lens; the sixth lens element (L6) is a meniscus lens; the seventh lens element (L7) is a meniscus lens; the eighth lens element (L8) is a meniscus lens; the fifth lens element (L1) is a meniscus lens; the sixth lens element (L6) is a meniscus lens; the seventh lens element (L7) is a meniscus lens; the eighth lens element (L8 ...9) is a meniscus lens; the eighth lens element (L1) is a meniscus lens; the ninth lens element (L1) is a meniscus lens; the eleventh lens element (L1) is a meniscus lens; the eleventh lens element (L1) is a meniscus lens; the eleventh lens element (L2) is a meniscus lens; the eleventh lens element (L3) is a meniscus lens; the Lens element (L5) is a biconvex lens; the sixth lens element (L6) is a meniscus lens; the seventh lens element (L7) is a biconvex lens; the eighth lens element (L8) is a meniscus lens; the mirror surface of the fifth lens element (L5) mates with the object surface of the sixth lens element (L6); the mirror surface of the seventh lens element (L7) mates with the object surface of the eighth lens element (L8); the first lens element (L1), the second lens element (L2), the third lens element (L3), and the fourth lens element (L4) are all glass lens elements; the first lens element (L1) to the eighth lens element (L8) respectively satisfy the following condition formula: Nd1≥1.9 1082, Vd1≥35.25; Nd2≥1.72916, Vd2≥54.68; Nd3≥2.0, Vd3≥30; Nd4≥1.78179, Vd4≥37.09; Nd5≥1.62041, Vd5≥60.34; Nd6≥1.80518, Vd6≥60.34; Nd7≥1.62041, Vd7≥60.34; Nd8≥1.84666, Vd8≥25.46; where Nd1, Nd2, Nd3, Nd4, Nd5, Nd6, Nd7, and Nd8 represent the first lens element (L1), the second lens element (L2), and the third lens element (L3), respectively. The d-ray refractive index of the materials of the fourth lens element (L4), fifth lens element (L5), sixth lens element (L6), seventh lens element (L7), and eighth lens element (L8), and Vd1, Vd2, Vd3, Vd4, Vd5, Vd6, Vd7, and Vd8 respectively represent the d-ray Abbe constant of the materials of the first lens element (L1), second lens element (L2), third lens element (L3), fourth lens element (L4), fifth lens element (L5), sixth lens element (L6), seventh lens element (L7), and eighth lens element (L8); the outer side of the first lens element (L1) and the eighth lens element (L8) is provided with a multilayer gradient refractive index film layer.

2. The fisheye 360° wide-angle high-definition 12-megapixel automotive lens according to claim 1, characterized in that: The distance S4 from the outermost point of the first lens element (L1) on the object side to the imaging plane must satisfy the following formula: total optical length S4 = 25.46 ± 0.3 mm.

3. The fisheye 360° wide-angle high-definition 12-megapixel automotive lens according to claim 1, characterized in that: The lens housing (1) is made of all-metal material.

4. The fisheye 360° wide-angle high-definition 12-megapixel automotive lens according to claim 1, characterized in that: The total height of the lens assembly, S2, is 21.26±0.3mm; the total height of the finished lens, S3, is 21.95±0.3mm; the total height of the mechanism, S5, is 23.75±0.3mm; the mechanical back focal length, S6, is 4.2±0.1mm; and the optical back focal length, S7, is 3.51±0.1mm.

5. A fisheye 360° wide-angle high-definition 12-megapixel automotive lens according to claim 1, characterized in that: The fifth lens element (L5) and the sixth lens element (L6) are bonded together with optical adhesive; the seventh lens element (L7) and the eighth lens element (L8) are bonded together with optical adhesive.

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