Vehicle-mounted high-definition looking-around optical imaging system and camera module applied by same

Abstract

The utility model provides a vehicle-mounted high-definition look-around optical imaging system and a camera module applying the same, which mainly comprise seven lenses, have the advantages of high pixel, large wide angle and weak ghost image through reasonable matching of lens shapes and focal power, are compact in structure and convenient to process and install, and simultaneously have high pixel and stable imaging quality at high and low temperatures.

Description

Technical Field

[0001] The present application relates to the field of optical imaging, and in particular to a vehicle-mounted high-definition surround view optical imaging system and a camera module used therein. Background Art

[0002] In recent years, with the continuous development of intelligent driving systems, vehicle-mounted surround view lenses have become one of the most popular applications of intelligent assisted driving systems, and the market size has gradually increased. However, the vehicle-mounted surround view lenses on the market currently have problems such as complex lens structure and poor imaging quality, which can no longer meet people's usage needs. Therefore, it is of great significance to design and manufacture high-pixel and stable imaging quality vehicle-mounted surround view lenses. Utility Model Content

[0003] The present application aims to solve the technical defects of the existing surround-view vehicle-mounted lenses, such as complex structure and poor imaging quality. The present application aims to provide an ultra-high-definition surround-view vehicle-mounted optical imaging system, which has the advantages of high pixels, wide angle, and weak ghost images, and at the same time, has high pixels and stable imaging quality under high and low temperatures.

[0004] A vehicle-mounted high-definition surround view optical imaging system, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in sequence from an object plane to an image plane along an optical axis;

[0005] The first lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0006] The second lens has negative optical power, and its image side surface is concave;

[0007] The third lens has positive refractive power, its object side surface is concave, and its image side surface is convex;

[0008] The fourth lens has positive refractive power, and its object side surface is convex;

[0009] The fifth lens has positive refractive power, its object side surface is concave, and its image side surface is convex;

[0010] The sixth lens has positive refractive power, its object side surface is convex, and its image side surface is convex;

[0011] The seventh lens has negative refractive power, its object side surface is concave, and its image side surface is convex.

[0012] Preferably, the optical imaging system satisfies the following relationship: <TTL / f<14;

[0013] Wherein, TTL is the distance from the object side surface of the first lens of the optical imaging system to the image plane, and f is the effective focal length of the optical imaging system.

[0014] Preferably, the optical imaging system satisfies the following relationship:

[0015] -5 <f1 / f<-3.5;

[0016] -4 <f2 / f<-3;

[0017] 8 <f3 / f<11;

[0018] 6 <f4 / f<8.5;

[0019] 4 <f5 / f<5;

[0020] 2 <f6 / f<3;

[0021] -3 <f7 / f<-2;

[0022] Wherein, f is the effective focal length of the optical imaging system, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens.

[0023] Preferably, the optical imaging system satisfies the following relationship:

[0024] 2.5<| R11 / R12|<3.2;

[0025] 2.0<| R31 / R32|<5.0;

[0026] 0<|R41 / R42|<1.0;

[0027] 2.0<| R51 / R52|<4.0;

[0028] 0<|R61 / R62|<2.0;

[0029] 0<| R71 / R72|<1.0;

[0030] Among them, R11 is the object side curvature radius of the first lens, R12 is the image side curvature radius of the first lens; R31 is the object side curvature radius of the third lens, R32 is the image side curvature radius of the third lens; R41 is the object side curvature radius of the fourth lens, R42 is the image side curvature radius of the fourth lens; R51 is the object side curvature radius of the fifth lens, R52 is the image side curvature radius of the fifth lens; R61 is the object side curvature radius of the sixth lens, R62 is the image side curvature radius of the sixth lens; R71 is the object side curvature radius of the seventh lens, R72 is the image side curvature radius of the seventh lens.

[0031] Preferably, the optical imaging system satisfies the following relationship:

[0032] 1.7 <nd1<2.05;

[0033] 1.5 <nd2<1.7;

[0034] 1.6 <nd3<2.0;

[0035] 1.5 <nd4<1.8;

[0036] 1.5 <nd5<1.65;

[0037] 1.5 <nd6<1.65;

[0038] 1.7 <nd7<2.0;

[0039] Among them, nd1 is the refractive index of the first lens; nd2 is the refractive index of the second lens; nd3 is the refractive index of the third lens; nd4 is the refractive index of the fourth lens; nd5 is the refractive index of the fifth lens; nd6 is the refractive index of the sixth lens; and nd7 is the refractive index of the seventh lens.

[0040] Preferably, the optical imaging system satisfies the following relationship:

[0041] 20 <vd1<60;

[0042] 30 <vd2<70;

[0043] 20 <vd3<70;

[0044] 20 <vd4<70;

[0045] 35 <vd5<70;

[0046] 35 <vd6<70;

[0047] 20 <vd7<60;

[0048] Among them, vd1 is the Abbe number of the first lens, vd2 is the Abbe number of the second lens, vd3 is the Abbe number of the third lens, vd4 is the Abbe number of the fourth lens, vd5 is the Abbe number of the fifth lens, vd6 is the Abbe number of the sixth lens, and vd7 is the Abbe number of the seventh lens.

[0049] Preferably, the optical imaging system satisfies the following relationship:

[0050] (dn / dt)6<-6.0(10 -06 / ℃);

[0051] Wherein, (dn / dt)6 is the coefficient of variation of the refractive index of the sixth lens with temperature.

[0052] Preferably, the optical imaging system satisfies the following relationship: |f123 / f567|≤1;

[0053] Among them, f123 is the combined focal length of the first lens, the second lens, and the third lens, and f567 is the combined focal length of the fifth lens, the sixth lens, and the seventh lens.

[0054] Preferably, the optical imaging system satisfies the following relationship: TTL / EPD<27;

[0055] Wherein, TTL is the distance from the object side surface of the first lens of the optical imaging system to the image plane, and EPD is the entrance pupil diameter of the optical imaging system.

[0056] Preferably, the optical imaging system satisfies the following relationship: TTL / IH<10;

[0057] Wherein, TTL is the distance from the object side surface of the first lens of the optical imaging system to the image plane, and IH is half of the maximum image circle diameter on the image plane.

[0058] On the other hand, an embodiment of the present application further provides a camera module, which at least includes an optical lens, in which the above-mentioned vehicle-mounted high-definition surround-view optical imaging system is installed.

[0059] Compared with the prior art, the beneficial effects of this application are as follows:

[0060] The utility model provides a vehicle-mounted high-definition surround-view optical imaging system and a camera module used therein, which is mainly composed of 7 lenses. Through the reasonable combination of lens shape and optical focal length, it has the advantages of high pixel, wide angle, and weak ghost image. It has a compact structure and is easy to process and install. At the same time, it has high pixel and stable imaging quality under high and low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for describing the embodiments are briefly introduced below.

[0062] Figure 1 It is a structural schematic diagram of the optical system or camera module of Example 1 of the present application;

[0063] Figure 2 is the astigmatism and distortion curve of the optical system or camera module of Example 1 of the present application;

[0064] Figure 3 is the MTF curve of the optical system or camera module of Example 1 of the present application;

[0065] Figure 4 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 2 of the present application;

[0066] Figure 5 is the astigmatism and distortion curves of the optical system or camera module according to Embodiment 2 of the present application;

[0067] Figure 6 is the MTF curve of the optical system or camera module according to Embodiment 2 of the present application;

[0068] Figure 7 is the structural schematic diagram of the optical system or camera module according to Embodiment 3 of the present application;

[0069] Figure 8 is the astigmatism and distortion curves of the optical system or camera module according to Embodiment 3 of the present application;

[0070] Fig. 9 is the MTF curve of the optical system or camera module according to Embodiment 3 of the present application. Detailed implementation manners

[0071] As Figure 1-9 shown, the present application provides a vehicle-mounted high-definition panoramic optical imaging system, which includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7 arranged in sequence from the object side. The first lens has a negative optical power, its object side is convex, and its image side is concave; the second lens has a negative optical power, and its image side is concave; the third lens has a positive optical power, its object side is concave, and its image side is convex; the fourth lens has a positive optical power, and its object side is convex; the fifth lens has a positive optical power, its object side is concave, and its image side is convex; the sixth lens has a positive optical power, its object side is convex, and its image side is convex; the seventh lens has a negative optical power, its object side is concave, and its image side is convex.

[0072] The optical system according to the embodiment of the present application is mainly composed of 7 lenses. Through reasonable matching of the lens shapes and optical powers, it has the advantages of high pixels, large wide angle, and weak ghost images. It has a compact structure, is convenient for processing and installation. At the same time, it has high pixels and stable imaging quality at high and low temperatures.

[0073] Furthermore, the optical imaging system satisfies the following condition: 12 < TTL / f < 14; where TTL is the distance from the object side surface of the first lens of the optical imaging system to the image plane, and f is the effective focal length of the optical imaging system. By reasonably balancing the relationship between the TTL of the optical imaging system and the effective focal length of the optical imaging system, while effectively increasing the maximum imaging circle, the overall size of the optical system is controlled to meet the requirements of the ultra-large wide-angle optical imaging system.

[0074] Further, the optical imaging system satisfies the following conditions: -5 < f1 / f < -3.5; -4 < f2 / f < -3; 8 < f3 / f < 11; 6 < f4 / f < 8.5; 4 < f5 / f < 5; 2 < f6 / f < 3; -3 < f7 / f < -2; where f is the effective focal length of the optical imaging system, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens. By limiting the ratio of the effective focal lengths of each lens to the effective focal length of the optical system, the optical system obtains a reasonable light deflection angle, effectively reduces the sensitivity to component tolerances, and improves the system aberration, achieving higher imaging quality.

[0075] Further, the optical imaging system satisfies the following conditions: 2.5 < |R11 / R12| < 3.2; 2.0 < |R31 / R32| < 5.0; 0 < |R41 / R42| < 1.0; 2.0 < |R51 / R52| < 4.0; 0 < |R61 / R62| < 2.0; 0 < |R71 / R72| < 1.0; where R11 is the curvature radius of the object side surface of the first lens, R12 is the curvature radius of the image side surface of the first lens; R31 is the curvature radius of the object side surface of the third lens, R32 is the curvature radius of the image side surface of the third lens; R41 is the curvature radius of the object side surface of the fourth lens, R42 is the curvature radius of the image side surface of the fourth lens; R51 is the curvature radius of the object side surface of the fifth lens, R52 is the curvature radius of the image side surface of the fifth lens; R61 is the curvature radius of the object side surface of the sixth lens, R62 is the curvature radius of the image side surface of the sixth lens; R71 is the curvature radius of the object side surface of the seventh lens, and R72 is the curvature radius of the image side surface of the seventh lens. By controlling the relationship between the curvature radii of each component, the ghost images formed by reflections between the lenses are effectively suppressed, and the incident angles of the chief rays of each field of view of the optical imaging lens on the image plane are relatively reasonably controlled, meeting the requirements of the incident angle of the chief ray in the optical system design, and effectively reducing the sensitivity of the system.

[0076] Further, the optical imaging system satisfies the following conditions: 1.7 < nd1 < 2.05; 1.5 < nd2 < 1.7; 1.6 < nd3 < 2.0; 1.5 < nd4 < 1.8; 1.5 < nd5 < 1.65; 1.5 < nd6 < 1.65; 1.7 < nd7 < 2.0; where nd1 is the refractive index of the first lens; nd2 is the refractive index of the second lens; nd3 is the refractive index of the third lens; nd4 is the refractive index of the fourth lens; nd5 is the refractive index of the fifth lens; nd6 is the refractive index of the sixth lens; and nd7 is the refractive index of the seventh lens. By reasonably selecting the refractive indices of each component, the aberration of the optical system is reduced, and the image quality of the high-pixel optical system is improved.

[0077] Furthermore, the optical imaging system satisfies the following conditions: 20 < vd1 < 60; 30 < vd2 < 70; 20 < vd3 < 70; 20 < vd4 < 70; 35 < vd5 < 70; 35 < vd6 < 70; 20 < vd7 < 60; where vd1 is the Abbe number of the first lens, vd2 is the Abbe number of the second lens, vd3 is the Abbe number of the third lens, vd4 is the Abbe number of the fourth lens, vd5 is the Abbe number of the fifth lens, vd6 is the Abbe number of the sixth lens, and vd7 is the Abbe number of the seventh lens. By reasonably selecting the Abbe numbers of each component, the aberration of the optical system is reduced, and the image quality of the high-pixel optical system is improved.

[0078] Furthermore, the optical imaging system satisfies the following condition: (dn / dt)6 < -6.0 (10 -06 / °C); where (dn / dt)6 is the refractive index temperature coefficient of the sixth lens. By reasonably selecting the refractive index temperature coefficient of the sixth lens, the overall temperature compensation of the optical system is corrected, which is beneficial to maintaining good imaging quality of the optical imaging system at high and low temperatures.

[0079] Furthermore, the optical imaging system satisfies the following condition: |f123 / f567| ≤ 1; where f123 is the combined focal length of the first lens, the second lens, and the third lens, and f567 is the combined focal length of the fifth lens, the sixth lens, and the seventh lens. By controlling the relationship between the focal lengths of each lens, the vehicle-mounted optical system has an ultra-wide angle and a small aperture, and has good imaging quality at high and low temperatures.

[0080] Furthermore, the optical imaging system satisfies the following condition: TTL / EPD < 27; where TTL is the distance from the object side surface of the first lens of the optical imaging system to the image plane, and EPD is the entrance pupil diameter of the optical imaging system. By limiting the relationship between TTL and the entrance pupil diameter EPD of the optical imaging system, the aberration of the system is finely adjusted and controlled, thereby effectively improving the imaging quality of the system and realizing the miniaturization of the ultra-wide angle optical imaging system.

[0081] Furthermore, the optical imaging system satisfies the following condition: TTL / IH < 10; where TTL is the distance from the object side surface of the first lens of the optical imaging system to the image plane, and IH is half of the maximum image circle diameter on the image plane. By limiting the relationship between TTL and the maximum image circle of the optical imaging system, it is beneficial to increase the maximum field of view angle and the maximum image circle.

[0082] Example 1

[0083] The following refers to Figures 1 to 3 Describe the optical imaging lens according to Embodiment 1 of the present application. Figure 1 Fig. shows a schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application.

[0084] like Figure 1 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, an aperture STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an infrared filter E8 and an imaging surface S16.

[0085] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive power, and its object side surface S10 is concave, and its image side surface S11 is convex. The sixth lens E6 has positive power, and its object side surface S12 is convex, and its image side surface S13 is convex. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is convex. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0086] Table 1 shows the surface type, curvature radius, thickness and material of each lens of the optical imaging lens of Example 1, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0087] Table 1

[0088]

[0089] In Table 1, any one of the object side and image side surfaces of the fifth lens E5 is an aspherical surface, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0090]

[0091] Wherein, x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula. Table 2 shows the cone coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface that can be used in Example 1.

[0092] Table 2

[0093]

[0094] Figure 2The astigmatism and distortion curves of the optical imaging lens of Example 1 are shown. Astigmatism refers to the meridional image curvature and the sagittal image curvature; and distortion refers to the distortion magnitude values ​​corresponding to different image heights.

[0095] Figure 3 The MTF curve of the optical imaging lens of Example 1 is shown, which represents the MTF values ​​in the meridian direction and sagittal direction of different fields of view at different spatial frequencies.

[0096] The optical imaging lens provided in Example 1 can achieve good imaging quality.

[0097] Embodiment 2

[0098] The following reference Figures 4 to 6 An optical imaging lens according to Embodiment 2 of the present application is described. Figure 4 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown.

[0099] like Figure 4 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, an aperture STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an infrared filter E8 and an imaging surface S16.

[0100] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive power, and its object side surface S10 is concave, and its image side surface S11 is convex. The sixth lens E6 has positive power, and its object side surface S12 is convex, and its image side surface S13 is convex. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is convex. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0101] Table 3 shows the surface type, curvature radius, thickness and material of each lens of the optical imaging lens of Example 2, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0102] Table 3

[0103]

[0104] In Table 3, any one of the object side and image side of the fifth lens E5 is an aspherical surface, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0105]

[0106] Wherein, x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula. Table 4 shows the cone coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface that can be used in Example 2.

[0107] Table 4

[0108]

[0109] Figure 5 The astigmatism and distortion curves of the optical imaging lens of Example 2 are shown. Astigmatism refers to the meridional image curvature and the sagittal image curvature; and distortion refers to the distortion magnitude values ​​corresponding to different image heights.

[0110] Figure 6 The MTF curve of the optical imaging lens of Example 2 is shown, which represents the MTF values ​​in the meridian direction and sagittal direction of different fields of view at different spatial frequencies.

[0111] The optical imaging lens provided in Example 2 can achieve good imaging quality.

[0112] Embodiment 3

[0113] The following reference Figures 7 to 9 An optical imaging lens according to Embodiment 3 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0114] like Figure 7 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, an aperture STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an infrared filter E8 and an imaging surface S16.

[0115] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative power, and its object side surface S12 is concave, and its image side surface S13 is convex. The filter E8 has an object side surface S14 and an image side surface S15. The light from the object passes through each surface S1 to S15 in sequence and is finally imaged on the imaging surface S16.

[0116] Table 5 shows the surface type, curvature radius, thickness and material of each lens of the optical imaging lens of Example 3, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0117] Table 5

[0118]

[0119] In Table 5, any one of the object side and image side of the fifth lens E5 is an aspherical surface, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0120]

[0121] Wherein, x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula. Table 6 shows the cone coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface that can be used in the third embodiment.

[0122] Table 6

[0123]

[0124] Figure 8 The astigmatism and distortion curves of the optical imaging lens of Example 3 are shown. Astigmatism refers to the meridional image curvature and the sagittal image curvature; and distortion refers to the distortion magnitude values ​​corresponding to different image heights.

[0125] Fig. 9 The MTF curve of the optical imaging lens of Example 3 is shown, which represents the MTF values ​​in the meridian direction and sagittal direction of different fields of view at different spatial frequencies.

[0126] The optical imaging lens provided in Example 3 can achieve good imaging quality.

[0127] In Examples 1-3, the basic data are as follows:

[0128] Table 7

[0129]

[0130] In Examples 1-3, each conditional expression satisfies the conditions in the following table:

[0131] Table 8

[0132]

[0133] A camera module includes at least an optical lens, in which the above-mentioned vehicle-mounted optical system is installed. The camera module has the advantages of high pixel and ultra-wide angle, compact structure, and is easy to process and install. At the same time, it has high pixel and stable imaging quality at high and low temperatures.

[0134] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of the utility model is not limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or a number of technical deductions or replacements based on the concept of the utility model, shall be regarded as the protection scope of the utility model.

Claims

1. A vehicle-mounted high-definition surround view optical imaging system, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in sequence from the object plane to the image plane along the optical axis, characterized in that: The first lens has negative optical power, its object side surface is convex, and its image side surface is concave; The second lens has negative optical power, and its image side surface is concave; The third lens has positive refractive power, its object side surface is concave, and its image side surface is convex; The fourth lens has positive refractive power, and its object side surface is convex; The fifth lens has positive refractive power, its object side surface is concave, and its image side surface is convex; The sixth lens has positive refractive power, its object side surface is convex, and its image side surface is convex; The seventh lens has negative refractive power, its object side surface is concave, and its image side surface is convex.

2. The vehicle-mounted high-definition surround view optical imaging system according to claim 1, characterized in that: The optical imaging system satisfies the following relationship: 12<TTL / f<14; Wherein, TTL is the distance from the object side surface of the first lens of the optical imaging system to the image plane, and f is the effective focal length of the optical imaging system.

3. The vehicle-mounted high-definition surround view optical imaging system according to claim 1, characterized in that: The optical imaging system satisfies the following relationship: -5< f1 / f <-3.5; -4< f2 / f <-3; 8< f3 / f <11; 6< f4 / f <8.5; 4< f5 / f <5; 2< f6 / f <3; -3< f7 / f <-2; Wherein, f is the effective focal length of the optical imaging system, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens.

4. The vehicle-mounted high-definition surround view optical imaging system according to any one of claims 1 to 3, characterized in that: The optical imaging system satisfies the following relationship: 2.5 < | R11 / R12 | < 3.2; 2.0 < | R31 / R32 | < 5.0; 0 < |R41 / R42| < 1.0; 2.0 < | R51 / R52 | < 4.0; 0 < |R61 / R62| < 2.0; 0 < | R71 / R72 |< 1.0; Among them, R11 is the object side curvature radius of the first lens, R12 is the image side curvature radius of the first lens; R31 is the object side curvature radius of the third lens, R32 is the image side curvature radius of the third lens; R41 is the object side curvature radius of the fourth lens, R42 is the image side curvature radius of the fourth lens; R51 is the object side curvature radius of the fifth lens, R52 is the image side curvature radius of the fifth lens; R61 is the object side curvature radius of the sixth lens, R62 is the image side curvature radius of the sixth lens; R71 is the object side curvature radius of the seventh lens, R72 is the image side curvature radius of the seventh lens.

5. The vehicle-mounted high-definition surround view optical imaging system according to any one of claims 1 to 3, characterized in that: The optical imaging system satisfies the following relationship: 1.7 < nd1 < 2.05; 1.5 < nd2 < 1.7; 1.6 < nd3 < 2.0; 1.5 < nd4 < 1.8; 1.5 < nd5 < 1.65; 1.5 < nd6 < 1.65; 1.7 < nd7 < 2.0; Among them, nd1 is the refractive index of the first lens; nd2 is the refractive index of the second lens; nd3 is the refractive index of the third lens; nd4 is the refractive index of the fourth lens; nd5 is the refractive index of the fifth lens; nd6 is the refractive index of the sixth lens; and nd7 is the refractive index of the seventh lens.

6. The vehicle-mounted high-definition surround view optical imaging system according to any one of claims 1 to 3, characterized in that: The optical imaging system satisfies the following relationship: 20 < vd1 < 60; 30 < vd2 < 70; 20 < vd3 < 70; 20 < vd4 < 70; 35 < vd5 < 70; 35 < vd6 < 70; 20 < vd7 < 60; Among them, vd1 is the Abbe number of the first lens, vd2 is the Abbe number of the second lens, vd3 is the Abbe number of the third lens, vd4 is the Abbe number of the fourth lens, vd5 is the Abbe number of the fifth lens, vd6 is the Abbe number of the sixth lens, and vd7 is the Abbe number of the seventh lens.

7. The vehicle-mounted high-definition surround view optical imaging system according to any one of claims 1 to 3, characterized in that: The optical imaging system satisfies the following relationship: (dn / dt)6<-6.0(10 -06 / ℃); Wherein, (dn / dt)6 is the coefficient of variation of the refractive index of the sixth lens with temperature.

8. The vehicle-mounted high-definition surround view optical imaging system according to any one of claims 1 to 3, characterized in that: The optical imaging system satisfies the following relationship: TTL / EPD<27; and / or TTL / IH < 10; Wherein, TTL is the distance from the object side surface of the first lens of the optical imaging system to the image plane, EPD is the entrance pupil diameter of the optical imaging system, and IH is half of the maximum image circle diameter on the image plane.

9. The vehicle-mounted high-definition surround view optical imaging system according to any one of claims 1 to 3, characterized in that: The optical imaging system satisfies the following relationship: |f123 / f567|≤1; Among them, f123 is the combined focal length of the first lens, the second lens, and the third lens, and f567 is the combined focal length of the fifth lens, the sixth lens, and the seventh lens.

10. A camera module, comprising at least an optical lens, characterized in that: The optical lens is equipped with a vehicle-mounted high-definition surround view optical imaging system as described in any one of claims 1 to 9.

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