Low-distortion vehicle-mounted optical imaging system and camera module applied by same

Abstract

The utility model provides a low-distortion vehicle-mounted optical imaging system and a camera module applying the same, which mainly comprise seven lenses, the first lens has focal power, the second lens has focal power, the object side surface of the second lens is a convex surface, the third lens has negative focal power, the object side surface of the third lens is a concave surface, the image side surface of the third lens is a concave surface, the fourth lens has positive focal power, and the fifth lens has negative focal power. The fifth lens has positive focal power, the object side face of the fifth lens is a convex face, the sixth lens has focal power, the seventh lens has negative focal power, through reasonable matching of the lens shapes and the focal power, the advantages of low distortion, high pixel and high resolution design are achieved, the temperature characteristic is excellent, and the image resolution ratio is high. The object identification capability of the optical system is further improved, and the design requirements of low distortion and high resolution of the optical system are effectively met.

Description

Technical Field

[0001] This application relates to the field of optical imaging, especially a low-distortion vehicle-mounted optical imaging system and its applied camera module. Background Art

[0002] With the continuous development of technology, the automotive industry has also entered the era of intelligence. As an important part of vehicle intelligence, the intelligent driving assistance system plays an important role in improving driving safety, reducing accident rates and enhancing user experience. To meet various requirements during driving, it is necessary to improve the performance of vehicle-mounted optical imaging systems, specifically featuring low distortion, high resolution and temperature insensitivity, while existing vehicle-mounted optical lenses cannot meet the above requirements. Summary of the Utility Model

[0003] This application aims to provide a low-distortion vehicle-mounted optical imaging system, which has the advantages of low distortion, high pixels and high resolution, excellent temperature characteristics, and further improves the object recognition ability of the optical imaging system.

[0004] A low-distortion vehicle-mounted optical imaging system successively includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens along the optical axis from the object plane to the image plane;

[0005] The first lens has a focal power;

[0006] The second lens has a focal power, and its object side is convex;

[0007] The third lens has a negative focal power, its object side is concave, and its image side is concave;

[0008] The fourth lens has a positive focal power, its object side is convex, and its image side is convex;

[0009] The fifth lens has a positive focal power, and its object side is convex;

[0010] The sixth lens has a focal power;

[0011] The seventh lens has a negative focal power.

[0012] Preferably, the optical imaging system satisfies the following relationship: 0 < |f1 + f2| / |f1 - f2| < 1.2;

[0013] Wherein, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.

[0014] Preferably, the optical imaging system satisfies the following relationship: -2.0 < f3 / f4 < 0;

[0015] Among them, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

[0016] Preferably, the optical imaging system satisfies the following relationship: -5.0 < f7 / f < 0;

[0017] Among them, f7 is the effective focal length of the seventh lens, and f is the effective focal length of the optical imaging system.

[0018] Preferably, the optical imaging system satisfies the following relationship: -10.0 < (f - f12) / f < 0; where f is the effective focal length of the optical imaging system, and f12 is the effective combined focal length of the first lens and the second lens.

[0019] Preferably, the optical imaging system satisfies the following relationship: 0.6 < f*tan(DFOV) / DT11 < 1.2;

[0020] Among them, f is the effective focal length of the optical imaging system, DFOV is half of the maximum field of view angle of the optical imaging system, and DT11 is the maximum effective radius of the object side surface of the first lens.

[0021] Preferably, the optical imaging system satisfies the following relationship: 1.2 < f / EPD < 2.2;

[0022] Among them, f is the effective focal length of the optical imaging system, and EPD is the entrance pupil diameter of the optical imaging lens.

[0023] Preferably, the optical imaging system satisfies the following relationship: 1.8 < f / TTL*ImagH < 3.6;

[0024] Among them, f is the effective focal length of the optical imaging system, TTL is the on-axis distance from the object side surface of the first lens to the imaging surface, and ImagH is half of the diagonal length of the effective pixel region on the imaging surface.

[0025] Preferably, the optical imaging system satisfies the following relationship:

[0026] Nd1 < 1.93, Vd1 > 34;

[0027] Nd2 < 1.9, Vd2 > 30;

[0028] Nd3 > 1.57, Vd3 < 50;

[0029] Nd4 > 1.49, Vd4 > 60;

[0030] Nd5 > 1.47, Vd5 > 60;

[0031] Nd6 < 1.85, Vd6 > 44;

[0032] Nd7 < 1.84, Vd7 > 20;

[0033] Wherein, Nd1 is the refractive index of the first lens, and Vd1 is the Abbe number of the first lens; Nd2 is the refractive index of the second lens, and Vd2 is the Abbe number of the second lens; Nd3 is the refractive index of the third lens, and Vd3 is the Abbe number of the third lens; Nd4 is the refractive index of the fourth lens, and Vd4 is the Abbe number of the fourth lens; Nd5 is the refractive index of the fifth lens, and Vd5 is the Abbe number of the fifth lens; Nd6 is the refractive index of the sixth lens, and Vd6 is the Abbe number of the sixth lens; Nd7 is the refractive index of the seventh lens, and Vd7 is the Abbe number of the seventh lens.

[0034] Preferably, the optical imaging system satisfies the following relationship: 0.7 < (R1 + R2) / R2 < 2.0;

[0035] Wherein, R1 is the curvature radius of the object side surface of the first lens, and R2 is the curvature radius of the image side surface of the first lens.

[0036] Preferably, the optical imaging system satisfies the following relationship: -3.8 < (R5 - R6) / R7 < -1.5;

[0037] Where R5 is the curvature radius of the object side surface of the third lens, R6 is the curvature radius of the image side surface of the third lens, and R7 is the curvature radius of the object side surface of the fourth lens.

[0038] On the other hand, an embodiment of the present application further provides an imaging module, which at least includes an optical lens, and the above low-distortion vehicle-mounted optical imaging system is installed in the optical lens.

[0039] Compared with the prior art, the beneficial effects of the present application are as follows:

[0040] The present application provides a low-distortion vehicle-mounted optical imaging system and an imaging module using the same. The system mainly consists of seven lenses. The first lens has a focal power, the second lens has a focal power, and its object side surface is convex. The third lens has a negative focal power, its object side surface is concave, and its image side surface is concave. The fourth lens has a positive focal power, its object side surface is convex, and its image side surface is convex. The fifth lens has a positive focal power, its object side surface is convex. The sixth lens has a focal power, and the seventh lens has a negative focal power. Through the reasonable combination of the lens shapes and focal powers, it has the advantages of low distortion, high pixel, and high resolution, excellent temperature characteristics, further improving the object recognition ability of the optical system, and effectively meeting the design requirements of low distortion and high resolution of the optical system. Description of the Drawings

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments.

[0042] Figure 1 is a schematic structural diagram of the optical imaging system or camera module according to Embodiment 1 of the present application;

[0043] Figure 2 is the field curvature curve and distortion curve of the optical imaging system or camera module according to Embodiment 1 of the present application;

[0044] Figure 3 is a schematic structural diagram of the optical imaging system or camera module according to Embodiment 2 of the present application;

[0045] Figure 4 is the field curvature curve and distortion curve of the optical imaging system or camera module according to Embodiment 2 of the present application;

[0046] Figure 5 is a schematic structural diagram of the optical imaging system or camera module according to Embodiment 3 of the present application;

[0047] Figure 6 is the field curvature curve and distortion curve of the optical imaging system or camera module according to Embodiment 3 of the present application. Detailed implementation manners

[0048] As Figures 1-6 shown, the present application provides a low-distortion vehicle-mounted optical imaging system, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens along the optical axis from the object plane to the image plane;

[0049] The first lens has a focal power;

[0050] The second lens has a focal power, and its object side is a convex surface;

[0051] The third lens has a negative focal power, its object side is a concave surface, and its image side is a concave surface;

[0052] The fourth lens has a positive focal power, its object side is a convex surface, and its image side is a convex surface;

[0053] The fifth lens has a positive focal power, and its object side is a convex surface;

[0054] The sixth lens has a focal power;

[0055] The seventh lens has a negative focal power.

[0056] The optical imaging system according to the embodiment of the present utility model is mainly composed of 7 lenses. Through reasonable matching of the lens shapes and focal powers, it has the advantages of low distortion, high pixel, and high resolution, excellent temperature characteristics, further improving the object recognition ability of the optical system, and effectively meeting the design requirements of low distortion and high resolution of the optical system.

[0057] Furthermore, the optical imaging system satisfies the following relationship: 0.6 < f * tan(DFOV) / DT11 < 1.2; where f is the effective focal length of the optical imaging system, DFOV is half of the maximum field of view angle of the optical imaging system, and DT11 is the maximum effective radius of the object side surface of the first lens. By reasonably allocating the effective focal length of the optical imaging system, half of the maximum field of view angle of the optical imaging system, and the maximum effective radius of the object side surface of the first lens, the size of the system can be effectively reduced.

[0058] Furthermore, the optical imaging system satisfies the following relationships: 1.2 < f / EPD < 2.2; 1.8 < f / TTL * ImagH < 3.6; where f is the effective focal length of the optical imaging system, EPD is the entrance pupil diameter of the optical imaging lens, TTL is the axial distance from the object side surface of the first lens to the imaging surface, and ImagH is half of the diagonal length of the effective pixel region on the imaging surface. By reasonably allocating the ratio of the effective focal length of the optical imaging lens, the axial distance from the object side surface of the first lens to the imaging surface, and half of the diagonal length of the effective pixel region on the imaging surface, the light deflection angle is small, the sensitivity of the optical imaging lens can be effectively reduced, the optical imaging lens can be thinned, have high pixels, be easily injection-molded, and have a high assembly yield.

[0059] Furthermore, the optical imaging system satisfies the following relationships: Nd1 < 1.93, Vd1 > 34; Nd2 < 1.9, Vd2 > 30; Nd3 > 1.57, Vd3 < 50; Nd4 > 1.49, Vd4 > 60; Nd5 > 1.47, Vd5 > 60; Nd6 < 1.85, Vd6 > 44; Nd7 < 1.84, Vd7 > 20; where Nd1 is the refractive index of the first lens, Vd1 is the Abbe number of the first lens; Nd2 is the refractive index of the second lens, Vd2 is the Abbe number of the second lens; Nd3 is the refractive index of the third lens, Vd3 is the Abbe number of the third lens; Nd4 is the refractive index of the fourth lens, Vd4 is the Abbe number of the fourth lens; Nd5 is the refractive index of the fifth lens, Vd5 is the Abbe number of the fifth lens, Nd6 is the refractive index of the sixth lens, Vd6 is the Abbe number of the sixth lens, Nd7 is the refractive index of the seventh lens, and Vd7 is the Abbe number of the seventh lens. This design can effectively reduce chromatic aberration, optimize lens aberrations, and thus effectively improve the imaging quality of the system.

[0060] Furthermore, the optical imaging system satisfies the following relationship: 0 < |f1 + f2| / |f1 - f2| < 1.2; where f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens. By reasonably controlling the focal length ratio of the first lens and the second lens, a higher imaging resolution can be obtained for the optical system.

[0061] Furthermore, the optical imaging system satisfies the following relationship: -2.0 < f3 / f4 < 0, where f3 is the effective focal length of the third lens and f4 is the effective focal length of the fourth lens. By defining the ratio of the effective focal lengths of the third lens and the fourth lens, the astigmatism of the system can be effectively corrected, thereby ensuring the image quality of the marginal field of view.

[0062] Furthermore, the optical imaging system satisfies the following relationship: 0.7 < (R1 + R2) / R2 < 2.0, where R1 is the curvature radius of the object side surface of the first lens and R2 is the curvature radius of the image side surface of the first lens. By controlling the curvature radii of the object side surface and the image side surface of the first lens, the total deflection angles of the object side surface and the image side surface of the first lens at the marginal field of view can be reasonably controlled within a reasonable range, effectively reducing the sensitivity of the system.

[0063] Furthermore, the optical imaging system satisfies the following relationship: -3.8 < (R5 - R6) / R7 < -1.5, where R5 is the curvature radius of the object side surface of the third lens, R6 is the curvature radius of the image side surface of the third lens, and R7 is the curvature radius of the object side surface of the fourth lens. By reasonably controlling the ratio of the curvature radii of the object side surfaces of the third lens and the fourth lens, the astigmatism contribution of the image side surface of the fourth lens is within a reasonable range to balance the accumulated astigmatism of the previous system, enabling the optical system to have relatively good imaging quality in both the meridional plane and the sagittal plane.

[0064] Furthermore, the optical imaging system satisfies the following relationship: -5.0 < f7 / f < 0, where f7 is the effective focal length of the seventh lens and f is the effective focal length of the optical system. By restricting the ratio of the optical power of the seventh lens to the effective focal length of the optical imaging system within a reasonable range, the remaining spherical aberration after balancing can balance the spherical aberration generated by the first six lenses, thereby finely adjusting and controlling the spherical aberration of the system and strengthening the precise control of the axial field of view aberration.

[0065] Furthermore, the optical imaging system satisfies the following relationship: -10.0 < (f - f12) / f < 0, where f12 is the effective combined focal length of the first lens and the second lens, and f is the effective focal length of the optical system. By reasonably restricting the relationship between the effective combined focal length of the first lens and the second lens and the effective focal length of the optical system, the imaging resolution of the system is improved. Exceeding the upper limit of the relationship, the refractive power of the lens combination is too small, easily generating large marginal aberrations and chromatic aberrations, which is not conducive to improving the resolution performance; exceeding the lower limit of the relationship, the overall refractive power of the first lens and the second lens is too strong, making the lens group prone to serious astigmatism phenomena, which is not conducive to the improvement of the imaging quality.

[0066] Embodiment 1

[0067] The following refers to Figures 1 to 2Describe the optical imaging lens according to Embodiment 1 of the present application. Figure 1 Fig. 2 shows a schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application.

[0068] As Figure 1 shown, the optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0069] The first lens E1 has a negative optical power, its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has a positive optical power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a negative optical power, its object side surface S6 is concave, and its image side surface S7 is concave. The fourth lens E4 has a positive optical power, its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has a positive optical power, its object side surface S9 is convex, and its image side surface S10 is flat. The sixth lens E6 has a positive optical power, its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has a negative optical power, 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. Light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0070] Table 1 shows the surface type, curvature radius, thickness, and material of each lens of the optical imaging lens of Embodiment 1, where the units of the curvature radius and thickness are both millimeters (mm).

[0071] Table 1

[0072]

[0073] In Table 1, either the object side surface and the image side surface of the second lens E2 or the sixth lens E6 are aspherical surfaces. The surface profiles of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0074]

[0075] where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface formula. Table 2 gives the conic coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of each aspherical surface that can be used in the first embodiment.

[0076] Table 2

[0077]

[0078] Example 2

[0079] The following refers to Figures 3 to 4 Describe the optical imaging lens according to Embodiment 2 of the present application. Figure 3 Fig. shows a schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application.

[0080] As Figure 3 shown, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, an STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0081] The first lens E1 has a positive optical power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has a negative optical power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a negative optical power, its object side surface S6 is concave, and its image side surface S7 is concave. The fourth lens E4 has a positive optical power, its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has a positive optical power, its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has a positive optical power, its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has a negative optical power, 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 sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0082] Table 3 shows the surface types, curvature radii, thicknesses, and materials of the lenses of the optical imaging lens of Embodiment 2, where the units of the curvature radii and thicknesses are both millimeters (mm).

[0083] Table 3

[0084]

[0085] In Table 3, both the object side surface and the image side surface of the second lens E2 are aspherical surfaces, and the surface shape of the aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0086]

[0087] Wherein, x is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface formula. Table 4 gives the conic coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of each aspherical surface that can be used in the second embodiment.

[0088] Table 4

[0089]

[0090] Embodiment Three:

[0091] The following refers to Figures 5 to 6 Describe the optical imaging lens according to Embodiment 3 of the present application. Figure 5 Fig. shows a schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application.

[0092] As Figure 5 shown, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, a chip protection glass sheet E9, and an imaging surface S21.

[0093] The first lens E1 has a negative optical power, its object side surface S1 is a concave surface, and its image side surface S2 is a convex surface. The second lens E2 has a positive optical power, its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a negative optical power, its object side surface S6 is a concave surface, and its image side surface S7 is a concave surface. The fourth lens E4 has a positive optical power, its object side surface S7 is a convex surface, and its image side surface S8 is a convex surface. The fifth lens E5 has a positive optical power, its object side surface S9 is a convex surface, and its image side surface S10 is a flat surface. The sixth lens E6 has a positive optical power, its object side surface S11 is a convex surface, and its image side surface S12 is a convex surface. The seventh lens E7 has a negative optical power, its object side surface S13 is a concave surface, and its image side surface S14 is a convex surface. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through each surface S1 to S16 and finally forms an image on the imaging surface S17.

[0094] Table 5 shows the surface types, curvature radii, thicknesses, and materials of the lenses of the optical imaging lens in Embodiment 3, where the units of the curvature radius and thickness are both millimeters (mm).

[0095] Table 5

[0096]

[0097] In Table 5, both the object side and the image side of the second lens E2 and the sixth lens E6 are aspherical surfaces. The surface profiles of the respective aspherical lenses can be defined by, but are not limited to, the following aspherical formula:

[0098]

[0099] Among them, x is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface profile formula. Table 6 gives the conic coefficients and the high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the respective aspherical surfaces that can be used in the first embodiment.

[0100] Table 6

[0101]

[0102] In Embodiments 1-3, each conditional expression satisfies the conditions in the following table:

[0103] Table 7

[0104]

[0105] An imaging module includes at least an optical lens. The above-mentioned low-distortion vehicle-mounted optical imaging system is installed inside the optical lens, which has the advantages of low distortion, high pixels, and high resolution, excellent temperature characteristics, further improving the object recognition ability of the optical system, and effectively meeting the design requirements of low distortion and high resolution of the optical system.

[0106] As described above, one or more implementation manners are provided in combination with specific content, and it is not determined that the specific implementation of the present invention is only limited to these descriptions. All those that are similar or identical to the method, structure, etc. of the present invention, or those that make several technical deductions or substitutions under the premise of the inventive concept of the present invention, should be regarded as within the protection scope of the present invention.

Claims

1. A low-distortion vehicle-mounted optical imaging system, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens along the optical axis from the object plane to the image plane, and is characterized in that: The first lens has a focal power. The second lens has a focal power, and its object side is a convex surface. The third lens has a negative focal power, its object side is a concave surface, and its image side is a concave surface. The fourth lens has a positive focal power, its object side is a convex surface, and its image side is a convex surface. The fifth lens has a positive focal power, and its object side is a convex surface. The sixth lens has a focal power. The seventh lens has a negative focal power.

2. The low-distortion vehicle-mounted optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following relationship: 0 < |f1 + f2| / |f1 - f2| < 1.2; Wherein, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.

3. The low-distortion vehicle-mounted optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following relationship: -2.0 < f3 / f4 < 0; Wherein, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

4. The low-distortion vehicle-mounted optical imaging system according to claim 1, characterized in that: The optical imaging system satisfies the following relationship: -5.0 < f7 / f < 0; Wherein, f7 is the effective focal length of the seventh lens, and f is the effective focal length of the optical imaging system.

5. The low-distortion vehicle-mounted optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following relationship: -10.0 < (f - f12) / f < 0; Wherein, f is the effective focal length of the optical imaging system, and f12 is the effective combined focal length of the first lens and the second lens.

6. The low-distortion vehicle-mounted optical imaging system according to any one of claims 1-5, characterized in that: The optical imaging system satisfies the following relationship: 0.6 < f * tan(DFOV) / DT11 < 1.2; Wherein, f is the effective focal length of the optical imaging system, DFOV is half of the maximum field of view angle of the optical imaging system, and DT11 is the maximum effective radius of the object side of the first lens.

7. The low-distortion vehicle-mounted optical imaging system according to any one of claims 1-5, characterized in that: The optical imaging system satisfies the following relationship: 1.2 < f / EPD < 2.2; and / or 1.8 < f / TTL * ImagH < 3.6; Wherein, f is the effective focal length of the optical imaging system, EPD is the entrance pupil diameter of the optical imaging lens, TTL is the axial distance from the object side of the first lens to the image plane, and ImagH is half of the diagonal length of the effective pixel area on the image plane.

8. The low-distortion vehicle-mounted optical imaging system according to any one of claims 1-5, characterized in that: The optical imaging system satisfies the following relationship: Nd1 < 1.93, Vd1 > 34; and / or Nd2 < 1.9, Vd2 > 30; and / or Nd3 > 1.57, Vd3 < 50; and / or Nd4 > 1.49, Vd4 > 60; and / or Nd5 > 1.47, Vd5 > 60; and / or Nd6 < 1.85, Vd6 > 44; and / or Nd7 < 1.84, Vd7 > 20; Wherein, Nd1 is the refractive index of the first lens, Vd1 is the Abbe number of the first lens; Nd2 is the refractive index of the second lens, Vd2 is the Abbe number of the second lens; Nd3 is the refractive index of the third lens, Vd3 is the Abbe number of the third lens; Nd4 is the refractive index of the fourth lens, Vd4 is the Abbe number of the fourth lens; Nd5 is the refractive index of the fifth lens, Vd5 is the Abbe number of the fifth lens, Nd6 is the refractive index of the sixth lens, Vd6 is the Abbe number of the sixth lens, Nd7 is the refractive index of the seventh lens, and Vd7 is the Abbe number of the seventh lens.

9. The low-distortion vehicle-mounted optical imaging system according to any one of claims 1-5, characterized in that: The optical imaging system satisfies the following relationships: 0.7 < (R1+R2) / R2 < 2.0; and / or -3.8 < (R5-R6) / R7 < -1.5; Wherein, R1 is the curvature radius of the object side surface of the first lens, R2 is the curvature radius of the image side surface of the first lens, R5 is the curvature radius of the object side surface of the third lens, R6 is the curvature radius of the image side surface of the third lens, and R7 is the curvature radius of the object side surface of the fourth lens.

10. An imaging module, at least comprising an optical lens, characterized in that: The low-distortion vehicle-mounted optical imaging system according to any one of claims 1-9 is installed in the optical lens.

Images