Low-distortion wide-angle high-resolution vehicle-mounted foresight optical system and camera module applied by same

Abstract

The utility model provides a low-distortion wide-angle high-resolution vehicle-mounted foresight optical system and a camera module applying the same, the system is mainly composed of seven lenses, the first lens has negative focal power, and the image side surface of the first lens is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface; the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface, and the image side surface is a convex surface; the fifth lens has focal power; the sixth lens has focal power; through reasonable matching of the lens shape and the focal power, the wide-angle optical system has the advantages of low distortion, wide angle and high resolution, and meanwhile, the wide angle can increase the light incoming amount of the optical system and higher imaging quality.

Description

Technical Field

[0001] This application relates to the field of optical imaging, and in particular to a low-distortion wide-angle high-resolution optical system applied to the in-vehicle front view field. Background Art

[0002] With the rapid development of camera lenses in the in-vehicle field, people have higher and higher requirements for lenses during driving. Not only a wide field of view is needed, but also high clarity is required. However, the lenses on the current market have a narrow field of view and low recognition during driving, unable to meet the higher needs of users; if the requirements of customers are to be met, the lens needs to have a wide field of view, and at the same time, to achieve the high resolution of the lens, it is necessary to increase the field angle of the optical system, which will have greater competitiveness in the market. Summary of the Utility Model

[0003] This application aims to provide a low-distortion wide-angle high-resolution in-vehicle front view optical system, which has the advantages of low distortion, wide angle, and high resolution. At the same time, the wide angle can increase the light input of the optical system and higher imaging quality.

[0004] A low-distortion wide-angle high-resolution in-vehicle front view optical system 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;

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

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

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

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

[0009] The fifth lens has an optical power;

[0010] The sixth lens has an optical power;

[0011] The seventh lens has a positive optical power, and its object side is a convex surface.

[0012] Preferably, the optical system satisfies the following relationship:

[0013] 0.42 < f / TTL * ImagH < 0.65;

[0014] Wherein, f is the effective focal length of the optical system, TTL is the axial distance from the object side of the first lens to the imaging plane, and ImagH is half of the diagonal length of the effective pixel area on the imaging plane.

[0015] Preferably, the optical system satisfies the following relationships:

[0016] -10.0 < f1 < -3.2;

[0017] -15.0 < f2 < -4.1;

[0018] 6.3 < f3 < 12.8;

[0019] 5.3 < f4 < 15.0;

[0020] -6.8 < f5 < 8.5;

[0021] -7.9 < f6 < 8.5;

[0022] 8.2 < f7 < 50.0;

[0023] Wherein, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.

[0024] Preferably, the optical system satisfies the following relationships:

[0025] -2.5 < f1 / f < 0;

[0026] -5.0 < f2 / f < -0.5;

[0027] 2.0 < f3 / f < 5.0;

[0028] 1.3 < f4 / f < 3.5;

[0029] -3.8 < f5 / f < 3.2;

[0030] -3.1 < f6 / f < 3.0;

[0031] 1.2 < f7 / f < 15.0;

[0032] Wherein, f is the focal length of the entire optical system, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.

[0033] Preferably, the refractive index Nd1 and Abbe number Vd1 of the material of the first lens satisfy: 1.65 < Nd1 < 2.00, 25 < Vd1 < 60.

[0034] Preferably, the refractive index Nd2 and Abbe number Vd2 of the material of the second lens satisfy: 1.55 < Nd2 < 1.80, 30 < Vd2 < 55.

[0035] Preferably, the refractive index Nd3 and Abbe number Vd3 of the material of the third lens satisfy: 1.60 < Nd3 < 1.95, 17.5 < Vd3 < 55.

[0036] Preferably, the refractive index Nd4 and Abbe number Vd4 of the material of the fourth lens satisfy: 1.44 < Nd4 < 2.00, 25 < Vd4 < 95.

[0037] Preferably, the refractive index Nd5 and Abbe number Vd5 of the material of the fifth lens satisfy: 1.43 < Nd5 < 2.00, 17.5 < Vd5 < 95.

[0038] Preferably, the refractive index Nd6 and Abbe number Vd6 of the material of the sixth lens satisfy: 1.43 < Nd6 < 2.00, 17.5 < Vd6 < 95.

[0039] Preferably, the refractive index Nd7 and Abbe number Vd7 of the material of the seventh lens satisfy: 1.49 < Nd7 < 2.00, 20 < Vd7 < 82.

[0040] Preferably, the first lens, the second lens, the third lens, the fifth lens and the sixth lens are spherical lenses, and the fourth lens and the seventh lens are glass aspherical lenses.

[0041] On the other hand, an embodiment of the present application further provides an imaging module, at least including an optical lens, and the above-mentioned low-distortion wide-angle high-resolution vehicle front-view optical system is installed in the optical lens.

[0042] Compared with the prior art, the beneficial effects of the present application are as follows:

[0043] The utility model provides a low-distortion wide-angle high-resolution vehicle front-view optical system and an imaging module applying the same, which are mainly composed of seven lenses. The first lens has a negative optical power, and its image side is concave; the second lens has a negative optical power, its object side is concave, and its image side is concave; the third lens has a positive optical power, its object side is convex, and its image side is convex; the fourth lens has a positive optical power, its object side is convex, and its image side is convex; the fifth lens has an optical power; the sixth lens has an optical power; the seventh lens has a positive optical power, and its object side is convex. Through the reasonable matching of the lens shapes and optical powers, it has the advantages of low distortion, wide angle and high resolution. At the same time, the wide angle can increase the light input of the optical system and higher imaging quality. Description of the Drawings

[0044] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments.

[0045] Figure 1 is a schematic structural diagram of the optical system or camera module in Embodiment 1 of the present application;

[0046] Figure 2 is the astigmatism and distortion curves of the optical system or camera module in Embodiment 1 of the present application;

[0047] Figure 3 is the chromatic aberration curve of the optical system or camera module in Embodiment 1 of the present application;

[0048] Figure 4 is a schematic structural diagram of the optical system or camera module in Embodiment 2 of the present application;

[0049] Figure 5 is the astigmatism and distortion curves of the optical system or camera module in Embodiment 2 of the present application;

[0050] Figure 6 is the chromatic aberration curve of the optical system or camera module in Embodiment 2 of the present application;

[0051] Figure 7 is a schematic structural diagram of the optical system or camera module in Embodiment 3 of the present application;

[0052] Figure 8 is the astigmatism and distortion curves of the optical system or camera module in Embodiment 3 of the present application;

[0053] Figure 9 is the chromatic aberration curve of the optical system or camera module in Embodiment 3 of the present application. Detailed implementation manners

[0054] As Figures 1-9 shown, the present application provides a low-distortion wide-angle high-resolution vehicle front-view optical system, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and a filter arranged in sequence from the object side. The first lens, the second lens, the third lens, the fifth lens, and the sixth lens are spherical lenses, and the fourth lens and the seventh lens are glass aspherical lenses. The first lens has a negative optical power, and its image side is concave; the second lens has a negative optical power, its object side is concave, and its image side is concave; the third lens has a positive optical power, its object side is convex, and its image side is convex; the fourth lens has a positive optical power, its object side is convex, and its image side is convex; the fifth lens has an optical power; the sixth lens has an optical power; the seventh lens has a positive optical power, and its object side is convex.

[0055] The optical system of the embodiment of the present application mainly consists of seven lenses. Through reasonable matching of the lens shapes and optical powers, it has the advantages of low distortion, wide angle, and high resolution. At the same time, the wide angle can increase the light input of the optical system and provide higher imaging quality.

[0056] Further, the optical system satisfies the following relationship: 0.42 < f / TTL * ImagH < 0.65; where f is the effective focal length of the optical imaging system, 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 area on the imaging surface. This relational expression reflects the constraint situation of the optical lens in terms of the field of view angle and the thin and light characteristics. When the above relational expression is satisfied, it can meet the market demand for the small head and thin and light characteristics of the optical lens on the basis of ensuring that the optical lens has a wide angle of view. When exceeding the upper limit of the relational expression, on the basis of ensuring that the field of view angle of the optical lens is wide, f / TTL * ImagH is further reduced, which will excessively compress the thin and light characteristics of the optical lens and is not conducive to the improvement of the performance of the optical lens. When lower than the lower limit of the relational expression, the thin and light characteristics of the optical lens are insufficient, which is not conducive to the miniaturized design of the optical lens.

[0057] Further, each lens of the optical system satisfies the following conditions: (1) -10.0 < f1 < -3.2; (2) -15.0 < f2 < -4.1; (3) 6.3 < f3 < 12.8; (4) 5.3 < f4 < 15.0; (5) -6.8 < f5 < 8.5; (6) -7.9 < f6 < 8.5; (7) 8.2 < f7 < 50.0; where f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens. By reasonably controlling the effective focal lengths of each lens of the optical system, the optical system can satisfy a large field of view angle, limit the effective diameter of the components, control the size of the overall optical system, and adjust the light incident angle, which is beneficial to correcting the system aberration.

[0058] Further, each lens of the optical system satisfies the following conditions: (1) -2.5 < f1 / f < 0; (2) -5.0 < f2 / f < -0.5; (3) 2.0 < f3 / f < 5.0; (4) 1.3 < f4 / f < 3.5; (5) -3.8 < f5 / f < 3.2; (6) -3.1 < f6 / f < 3.0; (7) 1.2 < f7 / f < 15.0; where f is the focal length of the entire optical system, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens. By limiting the ratio of the effective focal lengths of the respective lenses 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 system aberrations, achieving higher imaging quality.

[0059] Further, the refractive index Nd1 and Abbe number Vd1 of the material of the first lens satisfy: 1.65 < Nd1 < 2.00, 25 < Vd1 < 60; the refractive index Nd2 and Abbe number Vd2 of the material of the second lens satisfy: 1.55 < Nd2 < 1.80, 30 < Vd2 < 55; the refractive index Nd3 and Abbe number Vd3 of the material of the third lens satisfy: 1.60 < Nd3 < 1.95, 17.5 < Vd3 < 55; the refractive index Nd4 and Abbe number Vd4 of the material of the fourth lens satisfy: 1.44 < Nd4 < 2.00, 25 < Vd4 < 95; the refractive index Nd5 and Abbe number Vd5 of the material of the fifth lens satisfy: 1.43 < Nd5 < 2.00, 17.5 < Vd5 < 95; the refractive index Nd6 and Abbe number Vd6 of the material of the sixth lens satisfy: 1.43 < Nd6 < 2.00, 17.5 < Vd6 < 95; the refractive index Nd7 and Abbe number Vd7 of the material of the seventh lens satisfy: 1.49 < Nd7 < 2.00, 20 < Vd7 < 82. By limiting the relationship between the refractive index and Abbe number of each lens, it is beneficial to reduce aberrations and improve the image quality of the high-pixel optical system.

[0060] Example 1

[0061] 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.

[0062] As Figure 1 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, 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 S16.

[0063] The first lens E1 has a negative focal power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a negative focal power, its object side S3 is concave, and its image side S4 is concave. The third lens E3 has a positive focal power, its object side S4 is convex, and its image side S5 is convex. The fourth lens E4 has a positive focal power, its object side S6 is convex, and its image side S7 is convex. The fifth lens E5 has a negative focal power, its object side S9 is concave, and its image side S10 is concave. The sixth lens E6 has a positive focal power, its object side S10 is convex, and its image side S11 is convex. The seventh lens E7 has a positive focal power, its object side S12 is convex, and its image side S13 is concave. The filter E8 has an object side S14 and an image side S15. The light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0064] Table 1 shows the surface types, radii of curvature, thicknesses, and materials of the lenses of the optical imaging lens of Example 1. Among them, the units of the radius of curvature and the thickness are both millimeters (mm).

[0065] Table 1

[0066]

[0067] In Table 2, for any one of the fourth lens E4 and the seventh lens E7, both the object side and the image side are aspherical surfaces. The surface profiles of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0068]

[0069] 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 profile formula. Table 2 gives the conic coefficients and the high-order term coefficients A4, A6, A8, A10, and A12 of the aspherical surfaces that can be used in the first embodiment.

[0070] Table 2

[0071]

[0072] Figure 2 Shows the astigmatism and distortion curves of the optical imaging lens of Example 1. Astigmatism represents the curvature of the meridional image plane and the curvature of the sagittal image plane; distortion represents the distortion values corresponding to different image heights.

[0073] Figure 3 Shows the chromatic aberration curve of the optical imaging lens of Example 1, which represents the chromatic aberration offset at different wavelengths.

[0074] The optical imaging lens given in Embodiment 1 can achieve good imaging quality.

[0075] Embodiment Two

[0076] The following is a reference to Figures 4 to 6 Describe the optical imaging lens according to Embodiment 2 of the present application. Figure 4 The structural schematic diagram of the optical imaging lens according to Embodiment 2 of the present application is shown.

[0077] As Figure 4 As 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, 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 S16.

[0078] The first lens E1 has a negative optical power, its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has a negative optical power, its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has a positive optical power, its object side surface S4 is convex, and its image side surface S5 is convex. The fourth lens E4 has a positive optical power, its object side surface S6 is convex, and its image side surface S7 is convex. The fifth lens E5 has a negative optical power, its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has a positive optical power, its object side surface S10 is convex, and its image side surface S11 is convex. The seventh lens E7 has a positive optical power, its object side surface S12 is convex, and its image side surface S13 is concave. The filter E8 has an object side surface S14 and an image side surface S15. The light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0079] 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).

[0080] Table 3

[0081]

[0082] In Table 4, any one of the object side surface and the image side surface of the fourth lens E4 and the seventh lens E7 is an aspherical surface, and the surface profiles of the aspherical lenses can be defined by, but are not limited to, the following aspherical formula:

[0083]

[0084] 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 shows the conic coefficients and the high-order term coefficients A4, A6, A8, A10, and A12 of each aspherical surface that can be used in the second embodiment.

[0085] Table 4

[0086]

[0087] Figure 5 Shows the astigmatism and distortion curves of the optical imaging lens of Embodiment 2. Astigmatism represents the curvature of the meridional image plane and the sagittal image plane; distortion represents the distortion value corresponding to different image heights.

[0088] Figure 6 Shows the chromatic aberration curve of the optical imaging lens of Embodiment 2, which represents the chromatic aberration offset at different wavelengths.

[0089] The optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0090] Embodiment Three

[0091] The following refers to Figures 7 to 9 Describe the optical imaging lens according to Embodiment 3 of the present application. Figure 7 Shows a schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application.

[0092] As Figure 7 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, 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 S16.

[0093] The first lens E1 has a negative focal power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a negative focal power, its object side S3 is concave, and its image side S4 is concave. The third lens E3 has a positive focal power, its object side S4 is convex, and its image side S5 is convex. The fourth lens E4 has a positive focal power, its object side S6 is convex, and its image side S7 is convex. The fifth lens E5 has a positive focal power, its object side S9 is convex, and its image side S10 is convex. The sixth lens E6 has a negative focal power, its object side S10 is concave, and its image side S11 is concave. The seventh lens E7 has a positive focal power, its object side S12 is convex, and its image side S13 is convex. The filter E8 has an object side S14 and an image side S15. Light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

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

[0095] Table 5

[0096]

[0097] In Table 6, for any one of the fourth lens E4 and the seventh lens E7, both the object side and the image side are aspherical surfaces. The surface profiles of the aspherical lenses can be defined by, but 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, and A12 of the aspherical surfaces that can be used in the third embodiment.

[0100] Table 6

[0101]

[0102] Figure 8 Shows the astigmatism and distortion curves of the optical imaging lens of Embodiment 3. Astigmatism represents the curvature of the meridional image plane and the sagittal image plane; distortion represents the distortion magnitude values corresponding to different image heights.

[0103] Figure 9 Shows the chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the chromatic aberration offset at different wavelengths.

[0104] The optical imaging lens provided in Embodiment 3 can achieve good imaging quality.

[0105] An imaging module includes at least an optical lens, and the above-mentioned vehicle front view optical system is installed in the optical lens. The vehicle front view optical system of the present invention has the advantages of low distortion, wide angle, and high resolution. At the same time, the wide angle can increase the light input of the optical system and achieve higher imaging quality.

[0106] As described above, one or more implementation manners are provided in combination with specific contents, and it is not determined that the specific implementation of the present utility model is only limited to these descriptions. Any method, structure, etc. that is approximate or identical to the present utility model, or any technical deduction or replacement made on the premise of the concept of the present utility model, should be regarded as the protection scope of the present utility model.

Claims

1. A low-distortion wide-angle high-resolution vehicle front-view optical 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. It is characterized in that: The first lens has a negative focal power, and its image side is concave; The second lens has a negative focal power, its object side is concave, and its image side is concave; The third lens has a positive focal power, its object side is convex, and its image side is convex; The fourth lens has a positive focal power, its object side is convex, and its image side is convex; The fifth lens has a focal power; The sixth lens has a focal power; The seventh lens has a positive focal power, and its object side is convex; The optical system satisfies the following relationship: 0.42 < f / TTL*ImagH < 0.65; Wherein, f is the effective focal length of the optical system, TTL is the axial distance from the object side of the first lens to the imaging plane, and ImagH is half of the diagonal length of the effective pixel area on the imaging plane.

2. The low-distortion, wide-angle, high-resolution vehicle-mounted forward-looking optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: -10.0 < f1 < -3.2; and / or -15.0 < f2 < -4.1; and / or 6.3 < f3 < 12.8; and / or 5.3 < f4 < 15.0; and / or -6.8 < f5 < 8.5; and / or -7.9 < f6 < 8.5; and / or 8.2<f7<50.0； Wherein, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.

3. The low-distortion, wide-angle, high-resolution vehicle-mounted forward-looking optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: -2.5 < f1 / f < 0; and / or -5.0 < f2 / f < -0.5; and / or 2.0 < f3 / f < 5.0; and / or 1.3 < f4 / f < 3.5; and / or -3.8 < f5 / f < 3.2; and / or -3.1 < f6 / f < 3.0; and / or 1.2 < f7 / f < 15.0; Wherein, f is the focal length of the entire optical system, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.

4. The low-distortion, wide-angle, high-resolution vehicle-mounted forward-looking optical system according to claim 1, characterized in that: The refractive index Nd1 and Abbe number Vd1 of the material of the first lens satisfy: 1.65 < Nd1 < 2.00, 25 < Vd1 < 60; and / or The refractive index Nd2 and Abbe number Vd2 of the material of the second lens satisfy: 1.55 < Nd2 < 1.80, 30 < Vd2 < 55.

5. The low-distortion, wide-angle, high-resolution vehicle-mounted forward-looking optical system according to claim 1, characterized in that: The refractive index Nd3 and Abbe number Vd3 of the material of the third lens satisfy: 1.60 < Nd3 < 1.95, 17.5 < Vd3 < 55; and / or The refractive index Nd4 and Abbe number Vd4 of the material of the fourth lens satisfy: 1.44 < Nd4 < 2.00, 25 < Vd4 < 95.

6. The low-distortion, wide-angle, high-resolution vehicle-mounted forward-looking optical system according to claim 1, characterized in that: The refractive index Nd5 and Abbe number Vd5 of the material of the fifth lens satisfy: 1.43 < Nd5 < 2.00, 17.5 < Vd5 < 95; and / or The material refractive index Nd6 and the material Abbe number Vd6 of the sixth lens satisfy: 1.43 <Nd6<2.00,17.5<Vd6<95。 7. The low-distortion, wide-angle, high-resolution vehicle-mounted forward-looking optical system according to claim 1, characterized in that: The material refractive index Nd7 and the material Abbe number Vd7 of the seventh lens satisfy: 1.49 <Nd7<2.00,20<Vd7<82。 8. The low-distortion, wide-angle, high-resolution vehicle-mounted forward-looking optical system according to claim 1, characterized in that: The first lens, the second lens, the third lens, the fifth lens and the sixth lens are spherical lenses, and the fourth lens and the seventh lens are glass aspherical lenses.

9. A camera module, comprising at least an optical lens, characterized in that: The optical lens is equipped with a low-distortion, wide-angle, and high-resolution vehicle-mounted forward-looking optical system as described in any one of claims 1 to 8.

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