A high-definition automotive side-view optical lens and imaging device

Abstract

The present invention discloses a high-definition automotive side-view optical lens and imaging equipment, the high-definition automotive side-view optical lens comprises a first meniscus negative lens, a second lens, a third lens, an aperture, a fourth biconcave negative lens, a fifth biconvex positive lens, a sixth biconvex positive lens, a filter IR, a protective glass CG and an image plane IMA, which are sequentially arranged along the incident direction from left to right along the optical axis, the first meniscus negative lens has a negative optical focal length, the second lens has a positive optical focal length or a negative optical focal length, the third lens has a positive optical focal length or a negative optical focal length, the fourth biconcave negative lens has a negative optical focal length, the fifth biconvex positive lens has a positive optical focal length, and the sixth biconvex positive lens has a positive optical focal length. The present invention reduces lens distortion by reasonably configuring the surface shape, optical focal length, curvature radius, material, etc. of each lens, improves the clarity of the lens, facilitates miniaturization, overcomes the existing problems of low resolution, poor temperature stability, and high cost, and is suitable for automotive side-view systems and automatic driving fields.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical imaging, and in particular relates to a high-definition automobile side-view optical lens and imaging equipment. Background Art

[0002] In recent years, as people's requirements for automobile safety continue to increase, car cameras are increasingly used in assisted driving, which can provide feedback to the driver about the surrounding environment during driving, thus improving the driving safety of the vehicle. Among them, the side-view car camera is mainly used to collect road condition information on both sides of the car to avoid traffic accidents.

[0003] However, the images captured by the current side-view cameras in complex driving environments have low resolution and cannot simultaneously guarantee the requirement for a large field of view. Therefore, it is impossible to complete real-time and accurate monitoring of the vehicle's surroundings, which poses certain driving risks. Summary of the invention

[0004] In order to solve the technical problems existing in the prior art, the purpose of the present invention is to provide a high-definition automotive side-view optical lens and imaging equipment.

[0005] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the present invention is:

[0006] A high-definition automotive side-view optical lens, wherein a first meniscus negative lens, a second lens, a third lens, an aperture, a fourth biconcave negative lens, a fifth biconvex positive lens, a sixth biconvex positive lens, a filter IR, a protective glass CG and an image plane IMA are sequentially arranged along an optical axis from left to right in the incident direction, wherein the first meniscus negative lens has negative optical power, and its object side surface is convex, and its image side surface is concave, the second lens has positive optical power or negative optical power, the third lens has positive optical power or negative optical power, the fourth biconcave negative lens has negative optical power, and its object side surface is concave, and its image side surface is concave, the fifth biconvex positive lens has positive optical power, and its object side surface is convex, and its image side surface is convex, and the sixth biconvex positive lens has positive optical power, and its object side surface is convex, and its image side surface is convex;

[0007] The high-definition automotive side-view optical lens satisfies the conditional formula:

[0008] BFL / TTL>0.28

[0009] Among them, BFL is the distance from the center of the image side of the last lens of the high-definition automotive side-view optical lens to the imaging surface of the high-definition automotive side-view optical lens on the optical axis, and TTL is the distance from the center of the object side of the first meniscus negative lens to the imaging surface of the high-definition automotive side-view optical lens on the optical axis.

[0010] In one embodiment, the maximum field of view angle FOV of the high-definition automotive side-view optical lens, the entire set focal length value f of the high-definition automotive side-view optical lens, and the image height h corresponding to the maximum field of view angle of the high-definition automotive side-view optical lens satisfy the conditional formula:

[0011] 60.5≤(FOV×f) / h≤61.5.

[0012] In one embodiment, the high-definition automotive side-view optical lens satisfies the conditional formula:

[0013] -2.6≤f1 / f≤-2.1,-3.8≤f2 / f≤-2.4,1.7≤f3 / f≤2.35,-1.4≤f4 / f≤-0.85,1.1≤f5 / f≤1.6,1.8≤f6 / f≤2.4

[0014] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first meniscus negative lens, the second lens, the third lens, the fourth biconcave negative lens, the fifth biconvex positive lens, and the sixth biconvex positive lens, respectively.

[0015] In one embodiment, the refractive index of the first meniscus negative lens Nd1 is less than 1.55, and the Abbe number Vd1 is greater than 60; the refractive index of the second lens Nd2 is less than 1.5, and the Abbe number Vd2 is greater than 60; the refractive index of the third lens Nd3 is greater than 1.75, and the Abbe number Vd3 is less than 35; the refractive index of the fourth biconcave negative lens Nd4 is greater than 1.75, and the Abbe number Vd4 is less than 40; the refractive index of the fifth biconvex positive lens Nd5 is less than 1.7, and the Abbe number Vd5 is greater than 50; the refractive index of the sixth biconvex positive lens Nd6 is less than 1.55, and the Abbe number Vd6 is greater than 60.

[0016] In one embodiment, the high-definition automotive side-view optical lens satisfies the conditional formula:

[0017] -2.6≤f1 / f≤-2.1,1.7≤f2 / f≤2.45,-6.0≤f3 / f≤-2.5,-1.4≤f4 / f≤-0.85,1.1≤f5 / f≤1.6,1.8≤f6 / f≤2.4

[0018] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first meniscus negative lens, the second lens, the third lens, the fourth biconcave negative lens, the fifth biconvex positive lens, and the sixth biconvex positive lens, respectively.

[0019] In one embodiment, the refractive index of the first meniscus negative lens Nd1<1.55, and the Abbe number Vd1>60; the refractive index of the second lens Nd2>1.75, and the Abbe number Vd2<35; the refractive index of the third lens Nd3<1.5, and the Abbe number Vd3>60; the refractive index of the fourth biconcave negative lens Nd4>1.75, and the Abbe number Vd4<40; the refractive index of the fifth biconvex positive lens Nd5<1.7, and the Abbe number Vd5>50; the refractive index of the sixth biconvex positive lens Nd6<1.55, and the Abbe number Vd6>60.

[0020] In one embodiment, one of the first meniscus negative lens, the second lens, the third lens, the fourth biconcave negative lens, the fifth biconvex positive lens, and the sixth biconvex positive lens is made of a glass aspherical lens, and the remaining five lenses are made of glass spherical lenses.

[0021] In one embodiment, the sixth biconvex positive lens is a glass aspherical lens.

[0022] In one embodiment, the sixth biconvex positive lens satisfies dn / dt6<-3.0×10 -6 ℃, where dn / dt6 represents the refractive index temperature coefficient of the sixth biconvex positive lens.

[0023] The present invention also discloses an imaging device, comprising the high-definition automobile side-view optical lens and an imaging element as described above, wherein the imaging element is used to convert the optical image formed by the high-definition automobile side-view optical lens into an electrical signal.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The invention discloses a high-definition automobile side-view optical lens and an imaging device. The high-definition automobile side-view optical lens comprises six lenses, namely a first meniscus negative lens, a second lens, a third lens, a fourth double-concave negative lens, a fifth double-convex positive lens and a sixth double-convex positive lens. The lens distortion is reduced by reasonably configuring the surface shape, optical focal length, radius of curvature, material, maximum field of view angle FOV, the whole group focal length value f of the optical lens and the image height h corresponding to the maximum field of view angle of the optical lens, etc., which is beneficial to improving the clarity of the lens and making it easier to achieve miniaturization. The problems of low resolution, poor temperature stability and high cost in the prior art are overcome, and the lens is suitable for automobile side-view systems and the field of automatic driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0028] Figure 3This is a schematic diagram of the structure of Example 3 of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0030] A brief overview of one or more aspects is given below to provide a basic understanding of these aspects. This overview is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or decisive elements of all aspects nor to attempt to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description to be given later. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] like Figure 1-3 As shown, a high-definition automotive side-view optical lens is suitable for automotive side-view systems and the field of automatic driving. A first meniscus negative lens 1, a second lens 2, a third lens 3, an aperture 4, a fourth biconcave negative lens 5, a fifth biconvex positive lens 6, a sixth biconvex positive lens 7, a filter IR8, a protective glass CG 9 and an image plane IMA10 are sequentially arranged along the incident direction from left to right along the optical axis (i.e., from the object side to the image side along the optical axis). The first meniscus negative lens 1 has negative optical power, and its object side surface is convex, and its image side surface is concave; the second lens 2 can have positive optical power or negative optical power; the third lens 3 can have positive optical power or negative optical power; the fourth biconcave negative lens 5 has negative optical power, and its object side surface is concave, and its image side surface is concave; the fifth biconvex positive lens 6 has positive optical power, and its object side surface is convex, and its image side surface is convex; the sixth biconvex positive lens 7 has positive optical power, and its object side surface is convex, and its image side surface is convex.

[0032] High-definition automotive side-view optical lenses meet the following conditions:

[0033] BFL / TTL>0.28

[0034] Among them, BFL is the distance from the center of the image side of the last lens of the high-definition automobile side-view optical lens to the imaging surface of the high-definition automobile side-view optical lens on the optical axis, and TTL is the distance from the center of the object side of the first meniscus negative lens 1 to the imaging surface of the high-definition automobile side-view optical lens on the optical axis; it is beneficial to increase the optical back focus of the lens and leave sufficient space for the module.

[0035] The maximum field of view angle FOV of the high-definition automotive side-view optical lens, the focal length value f of the high-definition automotive side-view optical lens, and the image height h corresponding to the maximum field of view angle of the high-definition automotive side-view optical lens satisfy the conditional formula:

[0036] 60.5≤(FOV×f) / h≤61.5. Controlling the above three indicators is more conducive to reducing lens distortion.

[0037] One of the first meniscus negative lens 1, the second lens 2, the third lens 3, the fourth biconcave negative lens 5, the fifth biconvex positive lens 6, and the sixth biconvex positive lens 7 is made of glass aspherical lenses, and the remaining five lenses are made of glass spherical lenses.

[0038] The second lens 2 and the third lens 3 can be glued together to form a glued lens, or they can be separate lenses. The glued lens can reduce or eliminate chromatic aberration, which is beneficial to improving the clarity of lens imaging and making the installation process simpler. The second lens 2 and the third lens 3 have a reasonable distribution of optical power, which is beneficial to receiving light and reducing aberration.

[0039] Reasonable matching of materials and optical power of the fourth biconcave negative lens 5 and the fifth biconvex positive lens 6 is beneficial to reducing the chromatic aberration of the system and improving the resolution of the system.

[0040] The sixth biconvex positive lens 7 satisfies dn / dt6<-3.0×10 -6 ℃, where dn / dt6 represents the refractive index temperature coefficient of the sixth biconvex positive lens 7.

[0041] In one or some embodiments, the high-definition automotive side-view optical lens also satisfies the conditional formula:

[0042] -2.6≤f1 / f≤-2.1, -3.8≤f2 / f≤-2.4, 1.7≤f3 / f≤2.35, -1.4≤f4 / f≤-0.85, 1.1≤f5 / f≤1.6, 1.8≤f6 / f≤2.4, wherein f1, f2, f3, f4, f5, f6 are the focal lengths of the first meniscus negative lens 1, the second lens 2, the third lens 3, the fourth biconcave negative lens 5, the fifth biconvex positive lens 6, and the sixth biconvex positive lens 7 respectively.

[0043] In one or some embodiments, the high-definition automotive side-view optical lens also satisfies the conditional formula:

[0044] -2.6≤f1 / f≤-2.1, 1.7≤f2 / f≤2.45, -6.0≤f3 / f≤-2.5, -1.4≤f4 / f≤-0.85, 1.1≤f5 / f≤1.6, 1.8≤f6 / f≤2.4, wherein f1, f2, f3, f4, f5, f6 are the focal lengths of the first meniscus negative lens 1, the second lens 2, the third lens 3, the fourth biconcave negative lens 5, the fifth biconvex positive lens 6, and the sixth biconvex positive lens 7 respectively.

[0045] Example 1

[0046] like Figure 1 As shown, a high-definition automotive side-view optical lens is provided with a first meniscus negative lens 1, a second lens 2, a third lens 3, an aperture 4, a fourth biconcave negative lens 5, a fifth biconvex positive lens 6, a sixth biconvex positive lens 7, a filter IR 8, a protective glass CG 9 and an image plane IMA 10 in sequence along the optical axis from left to right in the incident direction.

[0047] Among them, the first meniscus negative lens 1 has negative focal power, its object side is convex, and its image side is concave. The refractive index Nd1 of the first meniscus negative lens 1 is less than 1.55, and the Abbe number Vd1 is greater than 60, which is conducive to collecting light and reducing the size of the head; the second lens 2 can have positive focal power or negative focal power, the refractive index Nd2 of the second lens 2 is less than 1.5, and the Abbe number Vd2 is greater than 60; the third lens 3 can have positive focal power or negative focal power, the refractive index Nd3 of the third lens 3 is greater than 1.75, and the Abbe number Vd3 is less than 35; the fourth The double concave negative lens 5 has negative optical power, its object side surface is concave, and the image side surface is concave. The refractive index Nd4 of the fourth double concave negative lens 5 is greater than 1.75, and the Abbe number Vd4 is less than 40; the fifth double convex positive lens 6 has positive optical power, its object side surface is convex, and the image side surface is convex. The refractive index Nd5 of the fifth double convex positive lens 6 is less than 1.7, and the Abbe number Vd5 is greater than 50; the sixth double convex positive lens 7 has positive optical power, its object side surface is convex, and the image side surface is convex. The refractive index Nd6 of the sixth double convex positive lens 7 is less than 1.55, and the Abbe number Vd6 is greater than 60.

[0048] The high-definition automotive side-view optical lens of this embodiment satisfies the conditional formula:

[0049] -2.6≤f1 / f≤-2.1,-3.8≤f2 / f≤-2.4,1.7≤f3 / f≤2.35,-1.4≤f4 / f≤-0.85,1.1≤f5 / f≤1.6,1.8≤f6 / f≤2.4

[0050] Among them, f1, f2, f3, f4, f5, and f6 are respectively the focal lengths of the first meniscus negative lens 1, the second lens 2, the third lens 3, the fourth biconcave negative lens 5, the fifth biconvex positive lens 6, and the sixth biconvex positive lens 7. By reasonably matching the focal lengths of the lenses, it is beneficial to reduce the assembly sensitivity and improve the assembly yield of the lens.

[0051] The high-definition automotive side-view optical lens of this embodiment satisfies the conditional formula:

[0052] BFL / TTL>0.28

[0053] Among them, BFL is the distance from the center of the image side of the last lens of the high-definition automobile side-view optical lens to the imaging surface of the high-definition automobile side-view optical lens on the optical axis, and TTL is the distance from the center of the object side of the first meniscus negative lens 1 to the imaging surface of the high-definition automobile side-view optical lens on the optical axis; it is beneficial to increase the optical back focus of the lens and leave sufficient space for the module.

[0054] The maximum field of view angle FOV of the high-definition automotive side-view optical lens, the focal length value f of the high-definition automotive side-view optical lens, and the image height h corresponding to the maximum field of view angle of the high-definition automotive side-view optical lens satisfy the conditional formula:

[0055] 60.5≤(FOV×f) / h≤61.5. Controlling the above three indicators is more conducive to reducing lens distortion.

[0056] One of the first meniscus negative lens 1, the second lens 2, the third lens 3, the fourth biconcave negative lens 5, the fifth biconvex positive lens 6, and the sixth biconvex positive lens 7 is made of glass aspherical lenses, and the remaining five lenses are made of glass spherical lenses.

[0057] The second lens 2 and the third lens 3 can be glued together to form a glued lens, or they can be separate lenses. The glued lens can reduce or eliminate chromatic aberration, which is beneficial to improving the clarity of lens imaging and making the installation process simpler. The second lens 2 and the third lens 3 have a reasonable distribution of optical power, which is beneficial to receiving light and reducing aberration.

[0058] Reasonable matching of materials and optical power of the fourth biconcave negative lens 5 and the fifth biconvex positive lens 6 is beneficial to reducing the chromatic aberration of the system and improving the resolution of the system.

[0059] The sixth biconvex positive lens 7 is preferably a glass aspherical lens, which is helpful for refracting light, reducing field curvature distortion and improving system imaging quality.

[0060] As a specific implementation, the sixth biconvex positive lens 7 satisfies dn / dt6<-3.0×10 -6 ℃, where dn / dt6 represents the refractive index temperature coefficient of the sixth biconvex positive lens 7.

[0061] Table 1 shows the surface type, curvature radius R, thickness and material of each lens in the high-definition automotive side-view optical lens of this embodiment, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0062] Table 1

[0063]

[0064] In Table 1, when the curvature radius of the aperture 4, the filter IR 8, the protective glass CG 9 and the image plane IMA 10 is infinite, it means that the surface is a plane.

[0065] The aspheric surface types are described as follows:

[0066]

[0067] Among them, Z(h) is the distance vector height from the aspheric surface to the vertex of the aspheric surface at a height of h along the optical axis; c=1 / r, r represents the radius of curvature of the aspheric mirror surface; k is the cone coefficient conic; A, B, C, D, E, F, G, and H are the coefficients of the high-order terms of the aspheric surface.

[0068] Table 2

[0069] Surface number k A B C D E F G H S12 -1.09 0 -9.310E-4 1.371E-4 -1.563E-5 1.383E-6 -3.635E-8 0 0 S13 -0.29 0 6.460E-4 1.539E-4 -1.788E-5 1.154E-6 -1.337E-8 0 0

[0070] Table 2 gives the cone coefficients and high-order coefficients A, B, C, D, E, F, G, and H of the aspheric lens surfaces S12 and S13 in Example 1.

[0071] This embodiment also discloses an imaging device, including the high-definition automotive side-view optical lens and an imaging element as described above, wherein the imaging element is used to convert an optical image formed by the high-definition automotive side-view optical lens into an electrical signal.

[0072] Example 2

[0073] like Figure 2 As shown, this embodiment discloses a high-definition automotive side-view optical lens, in which a first meniscus negative lens 1, a second lens 2, a third lens 3, an aperture 4, a fourth biconcave negative lens 5, a fifth biconvex positive lens 6, a sixth biconvex positive lens 7, a filter IR 8, a protective glass CG 9 and an image plane IMA 10 are sequentially arranged along the optical axis in the incident direction from left to right.

[0074] Among them, the first meniscus negative lens 1 has negative focal power, its object side is convex, and its image side is concave. The refractive index Nd1 of the first meniscus negative lens 1 is less than 1.55, and the Abbe number Vd1 is greater than 60, which is conducive to collecting light and reducing the size of the head; the second lens 2 can have positive focal power or negative focal power, the refractive index Nd2 of the second lens 2 is less than 1.5, and the Abbe number Vd2 is greater than 60; the third lens 3 can have positive focal power or negative focal power, the refractive index Nd3 of the third lens 3 is greater than 1.75, and the Abbe number Vd3 is less than 35; the fourth The double concave negative lens 5 has negative optical power, its object side surface is concave, and the image side surface is concave. The refractive index Nd4 of the fourth double concave negative lens 5 is greater than 1.75, and the Abbe number Vd4 is less than 40; the fifth double convex positive lens 6 has positive optical power, its object side surface is convex, and the image side surface is convex. The refractive index Nd5 of the fifth double convex positive lens 6 is less than 1.7, and the Abbe number Vd5 is greater than 50; the sixth double convex positive lens 7 has positive optical power, its object side surface is convex, and the image side surface is convex. The refractive index Nd6 of the sixth double convex positive lens 7 is less than 1.55, and the Abbe number Vd6 is greater than 60.

[0075] The high-definition automotive side-view optical lens of this embodiment satisfies the conditional formula:

[0076] -2.6≤f1 / f≤-2.1,-3.8≤f2 / f≤-2.4,1.7≤f3 / f≤2.35,-1.4≤f4 / f≤-0.85,1.1≤f5 / f≤1.6,1.8≤f6 / f≤2.4

[0077] Among them, f1, f2, f3, f4, f5, and f6 are respectively the focal lengths of the first meniscus negative lens 1, the second lens 2, the third lens 3, the fourth biconcave negative lens 5, the fifth biconvex positive lens 6, and the sixth biconvex positive lens 7. By reasonably matching the focal lengths of the lenses, it is beneficial to reduce the assembly sensitivity and improve the assembly yield of the lens.

[0078] The high-definition automotive side-view optical lens of this embodiment satisfies the conditional formula:

[0079] BFL / TTL>0.28

[0080] Among them, BFL is the distance from the center of the image side of the last lens of the high-definition automobile side-view optical lens to the imaging surface of the high-definition automobile side-view optical lens on the optical axis, and TTL is the distance from the center of the object side of the first meniscus negative lens 1 to the imaging surface of the high-definition automobile side-view optical lens on the optical axis; it is beneficial to increase the optical back focus of the lens and leave sufficient space for the module.

[0081] The maximum field of view angle FOV of the high-definition automotive side-view optical lens, the focal length value f of the high-definition automotive side-view optical lens, and the image height h corresponding to the maximum field of view angle of the high-definition automotive side-view optical lens satisfy the conditional formula:

[0082] 60.5≤(FOV×f) / h≤61.5. Controlling the above three indicators is more conducive to reducing lens distortion.

[0083] The second lens 2 and the third lens 3 can be glued together to form a glued lens, which can reduce or eliminate chromatic aberration, improve the clarity of lens imaging, and simplify the installation process. The second lens 2 and the third lens 3 have a reasonable distribution of optical power, which is conducive to receiving light and reducing aberration.

[0084] Reasonable matching of materials and optical power of the fourth biconcave negative lens 5 and the fifth biconvex positive lens 6 is beneficial to reducing the chromatic aberration of the system and improving the resolution of the system.

[0085] The sixth biconvex positive lens 7 is a glass aspherical lens, which is beneficial to refracting light, reducing field curvature distortion and improving the imaging quality of the system. The sixth biconvex positive lens 6 satisfies dn / dt6<-3.0×10 -6 ℃, where dn / dt6 represents the refractive index temperature coefficient of the sixth biconvex positive lens 7.

[0086] Table 3 shows the surface type, curvature radius R, thickness and material of each lens in the high-definition automotive side-view optical lens of this embodiment, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0087] Table 3

[0088]

[0089] In Table 3, when the curvature radius of the aperture 4, the filter IR 8, the protective glass CG 9 and the image plane IMA 10 is infinite, it means that the surface is a plane.

[0090] Table 4

[0091]

[0092]

[0093] Table 4 gives the cone coefficients and high-order coefficients A, B, C, D, E, F, G, and H of the aspheric lens surfaces S11 and S12 in Example 2.

[0094] The rest is the same as in Example 1.

[0095] Example 3

[0096] like Figure 3 As shown, this embodiment discloses a high-definition automotive side-view optical lens, in which a first meniscus negative lens 1, a second lens 2, a third lens 3, an aperture 4, a fourth biconcave negative lens 5, a fifth biconvex positive lens 6, a sixth biconvex positive lens 7, a filter IR 8, a protective glass CG 9 and an image plane IMA 10 are sequentially arranged along the optical axis in the incident direction from left to right.

[0097] The first meniscus negative lens 1 has negative focal power, its object side is convex, and its image side is concave. The refractive index Nd1 of the first meniscus negative lens 1 is less than 1.55, and the Abbe number Vd1 is greater than 60, which is conducive to collecting light and reducing the size of the head; the second lens 2 can have positive focal power or negative focal power, the refractive index Nd2 of the second lens 2 is greater than 1.75, and the Abbe number Vd2 is less than 35; the third lens 3 can have positive focal power or negative focal power, the refractive index Nd3 of the third lens 3 is less than 1.5, and the Abbe number Vd3 is greater than 60, and the fourth lens The concave negative lens 5 has negative optical focal power, its object side surface is concave, and the image side surface is concave. The refractive index Nd4 of the fourth double concave negative lens 5 is greater than 1.75, and the Abbe number Vd4 is less than 40; the fifth double convex positive lens 6 has positive optical focal power, its object side surface is convex, and the image side surface is convex. The refractive index Nd5 of the fifth double convex positive lens 6 is less than 1.7, and the Abbe number Vd5 is greater than 50; the sixth double convex positive lens 7 has positive optical focal power, its object side surface is convex, and the image side surface is convex. The refractive index Nd6 of the sixth double convex positive lens 7 is less than 1.55, and the Abbe number Vd6 is greater than 60.

[0098] The high-definition automotive side-view optical lens of this embodiment satisfies the conditional formula:

[0099] -2.6≤f1 / f≤-2.1,1.7≤f2 / f≤2.45,-6.0≤f3 / f≤-2.5,-1.4≤f4 / f≤-0.85,1.1≤f5 / f≤1.6,1.8≤f6 / f≤2.4

[0100] Among them, f1, f2, f3, f4, f5, and f6 are respectively the focal lengths of the first meniscus negative lens 1, the second lens 2, the third lens 3, the fourth biconcave negative lens 5, the fifth biconvex positive lens 6, and the sixth biconvex positive lens 7. By reasonably matching the focal lengths of the lenses, it is beneficial to reduce the assembly sensitivity and improve the assembly yield of the lens.

[0101] Table 5 shows the surface type, curvature radius R, thickness and material of each lens in the high-definition automotive side-view optical lens of this embodiment, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0102] Table 5

[0103]

[0104]

[0105] In Table 5, when the curvature radius of the aperture 4, the filter IR 8, the protective glass CG 9 and the image plane IMA10 is infinite, it means that the surface is a plane.

[0106] Table 6

[0107] Surface number k A B C D E F G H S11 -0.14 0 -2.394E-3 1.3543E-4 -1.229E-5 2.8963E-7 -1.919E-9 0 0 S12 0.07 0 1.0258E-3 -1.083E-4 1.4232E-5 -9.197E-7 1.441E-8 0 0

[0108] Table 6 gives the cone coefficients and high-order coefficients A, B, C, D, E, F, G, and H of the aspheric lens surfaces S11 and S12 in Example 3.

[0109] The rest is the same as in Example 1.

[0110] The parts not specifically described may adopt existing technologies and can be directly purchased on the market, so they will not be described in detail here.

[0111] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high-definition automotive side-view optical lens, characterized in that: A first meniscus negative lens, a second lens, a third lens, an aperture, a fourth biconcave negative lens, a fifth biconvex positive lens, a sixth biconvex positive lens, a filter IR, a protective glass CG and an image plane IMA are sequentially arranged along the optical axis from left to right in the incident direction, wherein the first meniscus negative lens has negative optical power, and its object side surface is convex, and its image side surface is concave, the second lens has positive optical power or negative optical power, the third lens has positive optical power or negative optical power, the fourth biconcave negative lens has negative optical power, and its object side surface is concave, and its image side surface is concave, the fifth biconvex positive lens has positive optical power, and its object side surface is convex, and its image side surface is convex, and the sixth biconvex positive lens has positive optical power, and its object side surface is convex, and its image side surface is convex; The high-definition automotive side-view optical lens satisfies the conditional formula: BFL / TTL>0.28; Wherein, BFL is the distance from the center of the image side of the last lens of the high-definition automotive side-view optical lens to the imaging surface of the high-definition automotive side-view optical lens on the optical axis, and TTL is the distance from the center of the object side of the first meniscus negative lens to the imaging surface of the high-definition automotive side-view optical lens on the optical axis; The maximum field of view angle FOV of the high-definition automotive side-view optical lens, the entire set focal length value f of the high-definition automotive side-view optical lens, and the image height h corresponding to the maximum field of view angle of the high-definition automotive side-view optical lens satisfy the conditional formula: 60.5≤(FOV×f) / h≤61.5; The high-definition automotive side-view optical lens satisfies the conditional formula: -2.6≤f1 / f≤-2.1,-3.8≤f2 / f≤-2.4,1.7≤f3 / f≤2.35,-1.4≤f4 / f≤-0.85,1.1≤f5 / f≤1.6,1.8≤f6 / f≤2.4 Wherein, f1, f2, f3, f4, f5, and f6 are respectively the focal lengths of the first meniscus negative lens, the second lens, the third lens, the fourth biconcave negative lens, the fifth biconvex positive lens, and the sixth biconvex positive lens; The refractive index of the first meniscus negative lens is Nd1<1.55, and the Abbe number Vd1>60; the refractive index of the second lens is Nd2<1.5, and the Abbe number Vd2>60; the refractive index of the third lens is Nd3>1.75, and the Abbe number Vd3<35; the refractive index of the fourth biconcave negative lens is Nd4>1.75, and the Abbe number Vd4<40; the refractive index of the fifth biconvex positive lens is Nd5<1.7, and the Abbe number Vd5>50; the refractive index of the sixth biconvex positive lens is Nd6<1.55, and the Abbe number Vd6>60; The sixth biconvex positive lens satisfies dn / dt6<-3.0×10 -6 ℃, where dn / dt6 represents the refractive index temperature coefficient of the sixth biconvex positive lens.

2. The high-definition automotive side-view optical lens according to claim 1, characterized in that: The high-definition automotive side-view optical lens satisfies the conditional formula: -2.6≤f1 / f≤-2.1,1.7≤f2 / f≤2.45,-6.0≤f3 / f≤-2.5,-1.4≤f4 / f≤-0.85,1.1≤f5 / f≤1.6,1.8≤f6 / f≤2.4 Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first meniscus negative lens, the second lens, the third lens, the fourth biconcave negative lens, the fifth biconvex positive lens, and the sixth biconvex positive lens, respectively.

3. The high-definition automotive side-view optical lens according to claim 2, characterized in that: The refractive index of the first meniscus negative lens is Nd1<1.55, and the Abbe number Vd1>60; the refractive index of the second lens is Nd2>1.75, and the Abbe number Vd2<35; the refractive index of the third lens is Nd3<1.5, and the Abbe number Vd3>60; the refractive index of the fourth biconcave negative lens is Nd4>1.75, and the Abbe number Vd4<40; the refractive index of the fifth biconvex positive lens is Nd5<1.7, and the Abbe number Vd5>50; the refractive index of the sixth biconvex positive lens is Nd6<1.55, and the Abbe number Vd6>60.

4. The high-definition automotive side-view optical lens according to claim 1, characterized in that: Among the first meniscus negative lens, the second lens, the third lens, the fourth biconcave negative lens, the fifth biconvex positive lens, and the sixth biconvex positive lens, one lens is made of glass aspherical lens, and the remaining five lenses are made of glass spherical lenses.

5. The high-definition automotive side-view optical lens according to claim 4, characterized in that: The sixth biconvex positive lens is a glass aspherical lens.

6. An imaging device, characterized in that: It comprises a high-definition automotive side-view optical lens and an imaging element as described in any one of claims 1 to 5, wherein the imaging element is used to convert an optical image formed by the high-definition automotive side-view optical lens into an electrical signal.

Images