Wide-angle high-pixel optical system and camera module using same

Abstract

The application provides a wide-angle high-pixel optical system and an application camera module thereof, which are mainly composed of nine lenses, wherein the first lens has negative focal power, the object side is a convex surface, and the image side is a concave surface; the second lens has negative focal power, the object side is a convex surface, and the image side is a concave surface; the third lens has negative focal power, the object side is a concave surface; the fourth lens has positive focal power, the object side is a concave surface, and the image side is a convex surface; the fifth lens has focal power; the sixth lens has positive focal power, the object side is a convex surface, and the image side is a convex surface; the seventh lens has positive focal power, the object side is a convex surface, and the image side is a convex surface; the eighth lens has negative focal power, the object side is a concave surface, and the image side is a concave surface; and the ninth lens has positive focal power, the object side is a convex surface, and the image side is a convex surface, and has the advantages of wide angle and high pixel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical imaging, in particular to a wide-angle high-pixel optical system applied to an electronic rearview mirror in the field of vehicle-mounted and a camera module applied thereto. BACKGROUND

[0002] With the rapid development of camera lenses in the field of electronic rearview mirrors, people have increasingly high requirements for the safety and cost of the lenses, not only requiring a bright picture, but also requiring high definition.

[0003] However, the traditional electronic rearview mirror on the market is a wide-angle lens, which has low recognition and high cost, and cannot meet the high requirements of users; if the definition of the imaging of users is to be met, the high pixel of the lens will have great competitiveness in the market. SUMMARY

[0004] The present application aims to overcome the problem of low recognition of the existing wide-angle lens, and provides a day and night confocal wide-angle optical system with the advantages of wide angle and high pixel.

[0005] A wide-angle high-pixel optical system is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens in sequence from an object plane to an image plane along an optical axis;

[0006] The first lens has negative focal power, and its object side surface is convex and its image side surface is concave;

[0007] The second lens has negative focal power, and its object side surface is convex and its image side surface is concave;

[0008] The third lens has negative focal power, and its object side surface is concave;

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

[0010] The fifth lens has focal power;

[0011] The sixth lens has positive focal power, and its object side surface is convex and its image side surface is convex;

[0012] The seventh lens has positive focal power, and its object side surface is convex and its image side surface is convex;

[0013] The eighth lens has negative focal power, and its object side surface is concave and its image side surface is concave;

[0014] The ninth lens has positive focal power, and its object side surface is convex and its image side surface is convex.

[0015] The wide-angle high-pixel optical system as described above, wherein each lens of the optical system satisfies the following conditions:

[0016] -40.0 mm < f1 < 0.0 mm;

[0017] -100.0 mm < f2 < -5.0 mm;

[0018] -40.0 mm < f3 < -8.0 mm;

[0019] 6.0 mm < f4 < 150.0 mm;

[0020] 3.0 mm < f5 < 50.0 mm;

[0021] 5.0 mm < f6 < 30.0 mm;

[0022] 1.0 mm < f7 < 20.0 mm;

[0023] -20.0 mm < f8 < -5.0 mm;

[0024] -40.0 mm < f78 < -5.0 mm;

[0025] 3.0 mm < f9 < 30.0 mm;

[0026] wherein f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, f8 is a focal length of the eighth lens, f78 is a combined focal length of the seventh lens and the eighth lens, and f9 is a focal length of the ninth lens.

[0027] The wide-angle high-pixel optical system as described above, wherein each lens of the optical system satisfies the following conditions:

[0028] -20.0 < f1 / f < 2.0;

[0029] -40.0 < f2 / f < 0.0;

[0030] -20.0 < f3 / f < 2.0;

[0031] 60.0 < f4 / f < 1.0;

[0032] 25.0 < f5 / f < 1.0;

[0033] 10.0 < f6 / f < 0.5;

[0034] 6.0 < f7 / f < 0.1;

[0035] -8.0 < f8 / f < 4.3;

[0036] -20.0 < f78 / f < 1.5;

[0037] 10.0 < f9 / f < 0.0;

[0038] 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, f7 is the focal length of the seventh lens, f8 is the focal length of the eighth lens, f78 is the combined focal length of the seventh lens and the eighth lens, and f9 is the focal length of the ninth lens.

[0039] The wide-angle high-pixel optical system as described above satisfies the following condition: f6 / f7 ≥ 2.50;

[0040] wherein f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens.

[0041] The wide-angle high-pixel optical system as described above satisfies the following relationship:

[0042] 0.13 < f / TTL*ImagH < 0.71;

[0043] wherein 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 the diagonal length of the effective pixel area on the imaging surface.

[0044] The wide-angle high-pixel optical system as described above satisfies the following conditions for the materials of the lenses: the material refractive index Nd1 and the material Abbe number Vd1 of the first lens satisfy 1.69 < Nd1 < 2.00 and 25 < Vd1 < 57.

[0045] The wide-angle high-pixel optical system as described above satisfies the following conditions for the materials of the lenses: the material refractive index Nd2 and the material Abbe number Vd2 of the second lens satisfy 1.50 < Nd2 < 1.70 and 15 < Vd2 < 60.

[0046] The wide-angle high-pixel optical system as described above satisfies the following conditions for the materials of the lenses: the material refractive index Nd3 and the material Abbe number Vd3 of the third lens satisfy 1.50 < Nd3 < 1.70 and 15 < Vd3 < 60.

[0047] The wide-angle high-pixel optical system as described above satisfies the following conditions for the materials of the lenses: the material refractive index Nd4 and the material Abbe number Vd4 of the fourth lens satisfy 1.50 < Nd4 < 2.00 and 17 < Vd4 < 68.

[0048] The wide-angle high-pixel optical system as described above, the material refractive index Nd5 of the fifth lens and the material Abbe number Vd5 satisfy: 1.50 < Nd5 < 2.00, 17 < Vd5 < 68.

[0049] The wide-angle high-pixel optical system as described above, the material refractive index Nd6 of the sixth lens and the material Abbe number Vd6 satisfy: 1.50 < Nd6 < 1.70, 15 < Vd6 < 60.

[0050] The wide-angle high-pixel optical system as described above, the material refractive index Nd7 of the seventh lens and the material Abbe number Vd7 satisfy: 1.43 < Nd7 < 1.62, 63 < Vd7 < 95.

[0051] The wide-angle high-pixel optical system as described above, the material refractive index Nd8 of the eighth lens and the material Abbe number Vd8 satisfy: 1.50 < Nd8 < 2.00, 17 < Vd8 < 68.

[0052] The wide-angle high-pixel optical system as described above, the material refractive index Nd9 of the ninth lens and the material Abbe number Vd9 satisfy: 1.50 < Nd9 < 1.70, 15 < Vd9 < 60.

[0053] The wide-angle high-pixel optical system as described above, the system diaphragm is located between the fifth lens and the sixth lens.

[0054] The wide-angle high-pixel optical system as described above, the first lens, the fourth lens, the fifth lens, the seventh lens and the eighth lens are spherical lenses, and the second lens, the third lens, the sixth lens and the ninth lens are plastic aspherical lenses.

[0055] In another aspect, the embodiment of the present application also provides a camera module, which at least comprises an optical lens, and the optical lens is internally mounted with the wide-angle high-pixel optical system.

[0056] Compared with the prior art, the beneficial effects of the present application are as follows:

[0057] The present application provides a wide-angle high-pixel optical system and a camera module using the same, which is mainly composed of nine lenses, has a reasonable number of lenses, a simple structure, optimizes lens aberration by reasonably distributing the optical power of the lenses, improves the resolving performance, has the advantages of wide angle and high pixel, meets the clarity imaging of users, realizes high pixel of the lens, and makes the electronic rearview mirror applied in the vehicle-mounted field have greater competitiveness in the market. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows.

[0059] Figure 1is a structural schematic diagram of an optical system or camera module of Embodiment 1 of the present application;

[0060] Figure 2 is an astigmatism and distortion curve of the optical system or camera module of Embodiment 1 of the present application;

[0061] Figure 3 is an MTF curve diagram of the optical system or camera module of Embodiment 1 of the present application;

[0062] Figure 4 is a structural schematic diagram of an optical system or camera module of Embodiment 2 of the present application;

[0063] Figure 5 is an astigmatism and distortion curve of the optical system or camera module of Embodiment 2 of the present application;

[0064] Figure 6 is an MTF curve diagram of the optical system or camera module of Embodiment 2 of the present application;

[0065] Figure 7 is a structural schematic diagram of an optical system or camera module of Embodiment 3 of the present application;

[0066] Figure 8 is an astigmatism and distortion curve of the optical system or camera module of Embodiment 3 of the present application;

[0067] Figure 9 is an MTF curve diagram of the optical system or camera module of Embodiment 3 of the present application. DETAILED DESCRIPTION

[0068] As Figures 1-9As shown, the application provides a day and night confocal wide-angle optical system, which is sequentially composed of a first lens E1, a second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9 and a filter E10 along an optical axis from an object plane to an image plane; the first lens, the fourth lens, the fifth lens, the seventh lens and the eighth lens are spherical lenses, the second lens, the third lens, the sixth lens and the ninth lens are plastic aspherical lenses, the first lens has a negative focal length, the object side surface thereof is a convex surface, and the image side surface thereof is a concave surface; the second lens has a negative focal length, the object side surface thereof is a convex surface, and the image side surface thereof is a concave surface; the third lens has a negative focal length, the object side surface thereof is a concave surface; the fourth lens has a positive focal length, the object side surface thereof is a concave surface, and the image side surface thereof is a convex surface; the fifth lens has a focal length; the sixth lens has a positive focal length, the object side surface thereof is a convex surface, and the image side surface thereof is a convex surface; the seventh lens has a positive focal length, the object side surface thereof is a convex surface, and the image side surface thereof is a convex surface; the eighth lens has a negative focal length, the object side surface thereof is a concave surface, and the image side surface thereof is a concave surface; and the ninth lens has a positive focal length, the object side surface thereof is a convex surface, and the image side surface thereof is a convex surface.

[0069] The optical system of the embodiment of the application is mainly composed of nine lenses, the number of lenses is reasonable, the structure is simple, the lens focal length is reasonably distributed, the lens aberration is optimized, the resolution performance is improved, the advantages of wide angle and high pixel are achieved, the clarity of imaging of the user is met, the high pixel of the lens is realized, and the electronic rearview mirror applied to the vehicle-mounted field has greater competitiveness in the market.

[0070] Further, as a preferred embodiment of the application but not limited, each lens of the optical system satisfies the following conditions: -40.0mm < f1 < 0.0mm; -100.0mm < f2 < -5.0mm; -40.0mm < f3 < -8.0mm; 6.0mm < f4 < 150.0mm; 3.0mm < f5 < 50.0mm; 5.0mm < f6 < 30.0mm; 1.0mm < f7 < 20.0mm; -20.0mm < f8 < -5.0mm; -40.0mm < f78 < -5.0mm; 3.0mm < f9 < 30.0mm; 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, f7 is the focal length of the seventh lens, f8 is the focal length of the eighth lens, f78 is the combined focal length of the seventh lens and the eighth lens, and f9 is the focal length of the ninth lens. By reasonably controlling the effective focal length of each lens of the optical system, the optical system can meet the large field angle, limit the effective diameter of the parts, control the overall size of the optical system, and adjust the light incidence angle, which is conducive to correcting the system aberration.

[0071] Further, as a preferred embodiment of the present application but not limited, each lens of the optical system satisfies the following conditions: -20.0 < f1 / f < 2.0; -40.0 < f2 / f < 0.0; -20.0 < f3 / f < 2.0; 60.0 < f4 / f < 1.0; 25.0 < f5 / f < 1.0; 10.0 < f6 / f < 0.5; 6.0 < f7 / f < 0.1; -8.0 < f8 / f < 4.3; -20.0 < f78 / f < 1.5; 10.0 < f9 / f < 0.0; 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, f7 is the focal length of the seventh lens, f8 is the focal length of the eighth lens, f78 is the combined focal length of the seventh lens and the eighth lens, and f9 is the focal length of the ninth lens. By controlling the ratio of the effective focal length of each lens to the effective focal length of the optical system, a reasonable light deflection angle is obtained for the optical system, the part tolerance sensitivity is effectively reduced, and the system aberration is improved.

[0072] Further, as a preferred embodiment of the present application but not limited, the optical system satisfies the following conditions: f6 / f7≥2.50; wherein 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 the sixth lens E6 and the seventh lens E7, the distortion of the system can be effectively corrected, and the imaging quality of the peripheral field of view is improved.

[0073] The wide-angle high-pixel optical system as described above satisfies the following relationship: 0.13 < f / TTL*ImagH < 0.71; wherein f is the effective focal length of the optical imaging system, TTL is the axial distance from the object side of the first lens to the imaging surface, and ImagH is half the diagonal length of the effective pixel area on the imaging surface. This relationship reflects the constraints of the optical lens on the field of view and the thinness. When the above relationship is satisfied, the demand for thinness of the optical lens can be met on the basis of the optical lens.

[0074] Further, as a preferred embodiment of the present application but not limited, the material refractive index Nd1 and the material Abbe number Vd1 of the first lens satisfy: 1.69 < Nd1 < 2.00, 25 < Vd1 < 57, the material refractive index Nd2 and the material Abbe number Vd2 of the second lens satisfy: 1.50 < Nd2 < 1.70, 15 < Vd2 < 60, the material refractive index Nd3 and the material Abbe number Vd3 of the third lens satisfy: 1.50 < Nd3 < 1.70, 15 < Vd3 < 60, the material refractive index Nd4 and the material Abbe number Vd4 of the fourth lens satisfy: 1.50 < Nd4 < 2.00, 17 < Vd4 < 68, the material refractive index Nd5 and the material Abbe number Vd5 of the fifth lens satisfy: 1.50 < Nd5 < 2.00, 17 < Vd5 < 68, the material refractive index Nd6 and the material Abbe number Vd6 of the sixth lens satisfy: 1.50 < Nd6 < 1.70, 15 < Vd6 < 60, the material refractive index Nd7 and the material Abbe number Vd7 of the seventh lens satisfy: 1.43 < Nd7 < 1.62, 63 < Vd7 < 95, the material refractive index Nd8 and the material Abbe number Vd8 of the eighth lens satisfy: 1.50 < Nd8 < 2.00, 17 < Vd8 < 68, the material refractive index Nd9 and the material Abbe number Vd9 of the ninth lens satisfy: 1.50 < Nd9 < 1.70, 15 < Vd9 < 60. By limiting the relationship between the refractive index and the Abbe number of each lens, it is beneficial to reduce aberration and improve the image quality of the high-pixel optical system.

[0075] Further, as a preferred embodiment of the present application but not limited, the first lens, the fourth lens, the fifth lens, the seventh lens and the eighth lens are spherical lenses, and the second lens, the third lens, the sixth lens and the ninth lens are plastic aspherical lenses. The glass-plastic hybrid lens has higher imaging quality and lower cost.

[0076] Specifically, as a preferred embodiment of the present application but not limited, the following refers to Figures 1 to 3 An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 A structural schematic diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0077] 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, an STO, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10 and an imaging surface S21.

[0078] The first lens E1 has negative refractive power, the object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative refractive power, the object side surface S3 is convex, and the image side surface S4 is concave. The third lens E3 has negative refractive power, the object side surface S5 is concave. The fourth lens E4 has positive refractive power, the object side surface S7 is concave, and the image side surface S8 is convex. The fifth lens E5 has refractive power. The sixth lens E6 has positive refractive power, the object side surface S12 is convex, and the image side surface S13 is convex. The seventh lens E7 has positive refractive power, the object side surface S14 is convex, and the image side surface S15 is convex. The eighth lens E8 has negative refractive power, the object side surface S15 is concave, and the image side surface S16 is concave. The ninth lens E9 has positive refractive power, the object side surface S17 is convex, and the image side surface S18 is convex. The filter E10 has the object side surface S19 and the image side surface S20. The light from the object sequentially passes through the surfaces S1 to S20 and is finally imaged on the imaging surface S21.

[0079] Table 1 shows the surface type, the radius of curvature, the thickness and the material of each lens of the optical imaging lens of Example 1, wherein the units of the radius of curvature and the thickness are millimeter (mm).

[0080] Table 1

[0081]

[0082] In Table 2, the object side surface and the image side surface of each of the second lens E2, the third lens E3, the sixth lens E6 to the ninth lens E9 are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0083]

[0084] 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 conic coefficient, and Ai is the coefficient corresponding to the i-th high order term in the aspherical surface formula. Table 2 shows the conic coefficient and the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspherical surface that can be used in the first embodiment.

[0085] Table 2

[0086]

[0087] Figure 2 The astigmatism and distortion curves of the optical imaging lens of Example 1 are shown. The astigmatism represents the meridional image surface curvature and the sagittal image surface curvature; the distortion represents the distortion size value corresponding to different image heights. Figure 3The MTF curves of the optical imaging lens of embodiment 1 are shown, which represent the meridional direction and sagittal direction MTF values of different fields of view. The optical imaging lens given in embodiment 1 can achieve good imaging quality.

[0088] In particular, as a preferred embodiment of the present application but not limited, the following refers to Figures 4 to 6 An optical imaging lens according to embodiment 2 of the present application is described. Figure 4 A structural schematic diagram of the optical imaging lens according to embodiment 2 of the present application is shown.

[0089] As Figure 4 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, an STO, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an imaging surface S21.

[0090] The first lens E1 has a negative focal power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has a negative focal power, the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface. The third lens E3 has a negative focal power, the object side surface S5 is a concave surface. The fourth lens E4 has a positive focal power, the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface. The fifth lens E5 has a focal power. The sixth lens E6 has a positive focal power, the object side surface S12 is a convex surface, and the image side surface S13 is a convex surface. The seventh lens E7 has a positive focal power, the object side surface S14 is a convex surface, and the image side surface S15 is a convex surface. The eighth lens E8 has a negative focal power, the object side surface S15 is a concave surface, and the image side surface S16 is a concave surface. The ninth lens E9 has a positive focal power, the object side surface S17 is a convex surface, and the image side surface S18 is a convex surface. The filter E10 has an object side surface S19 and an image side surface S20. Light from an object sequentially passes through each surface S1 to S20 and is finally imaged on the imaging surface S21.

[0091] Table 3 shows the surface type, curvature radius, thickness, and material of each lens of the optical imaging lens of embodiment 2, wherein the units of the curvature radius and the thickness are millimeters (mm).

[0092] Table 3

[0093]

[0094] In Table 4, the object side surface and the image side surface of any one of the second lens E2, the third lens E3, the sixth lens E6 to the ninth lens E9 are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0095]

[0096] 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 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 high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of the aspherical surfaces that can be used in the second embodiment.

[0097] Table 4

[0098]

[0099] In particular, as a preferred embodiment but not a limitation of the present application, the following refers to Figures 7 to 9 An optical imaging lens according to Embodiment 3 of the present application is described. Figure 7 A structural schematic diagram of the optical imaging lens according to Embodiment 3 of the present application is shown.

[0100] Figure 5 The astigmatism and distortion curves of the optical imaging lens of Embodiment 2 are shown. The astigmatism represents the meridional image surface curvature and sagittal image surface curvature; the distortion represents the distortion size values corresponding to different image heights. Figure 6 The MTF curves of the optical imaging lens of Embodiment 2 are shown, which represent the meridional and sagittal direction MTF values at different fields of view. The optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0101] As shown in Figure 7 The optical imaging lens according to the exemplary embodiments 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, an STO, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an imaging surface S21.

[0102] The first lens E1 has negative refractive power, the object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative refractive power, the object side surface S3 is convex, and the image side surface S4 is concave. The third lens E3 has positive refractive power, the object side surface S5 is concave, and the image side surface S6 is convex. The fourth lens E4 has positive refractive power, the object side surface S7 is concave, and the image side surface S8 is convex. The fifth lens E5 has refractive power. The sixth lens E6 has positive refractive power, the object side surface S12 is convex, and the image side surface S13 is convex. The seventh lens E7 has positive refractive power, the object side surface S14 is convex, and the image side surface S15 is convex. The eighth lens E8 has negative refractive power, the object side surface S15 is concave, and the image side surface S16 is concave. The ninth lens E9 has positive refractive power, the object side surface S17 is convex, and the image side surface S18 is convex. The filter E10 has an object side surface S19 and an image side surface S20. Light from an object sequentially passes through the surfaces S1 to S20 and is finally imaged on an imaging surface S21.

[0103] Table 5 shows the surface type, the radius of curvature, the thickness and the material of each lens of the optical imaging lens of Example 3, wherein the units of the radius of curvature and the thickness are millimeter (mm).

[0104] Table 5

[0105]

[0106] In Table 6, the object side surface and the image side surface of each of the second lens E2, the third lens E3, the sixth lens E6 to the ninth lens E9 are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0107]

[0108] wherein x is the distance from a corresponding point on the aspherical surface to a 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 conic coefficient, and Ai is the coefficient corresponding to the ith high order term in the aspherical surface formula. Table 6 shows the conic coefficient and the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspherical surface that can be used in the third embodiment.

[0109] Table 6

[0110]

[0111] Figure 8 The astigmatism and distortion curves of the optical imaging lens of Example 3 are shown. The astigmatism represents the meridional image surface curvature and the sagittal image surface curvature; the distortion represents the distortion size value corresponding to different image heights. Figure 9The MTF curve of the optical imaging lens of embodiment 3 is shown, which represents the meridional direction and sagittal direction MTF values of different fields of view. The optical imaging lens given in embodiment 3 can achieve good imaging quality.

[0112] A camera lens comprises at least an optical lens, wherein the optical lens is provided with the wide-angle high-pixel optical system as described above, the number of lenses is reasonable, the structure is simple, the lens power is reasonably distributed, the lens aberration is optimized, the resolution performance is improved, the advantages of wide angle and high pixel are achieved, the clarity imaging of users is met, the high pixel of the lens is realized, and the electronic rearview mirror applied to the vehicle-mounted field has greater competitiveness in the market.

[0113] The above is one or more embodiments provided in combination with specific content, and it is not intended that the specific implementation of the present application is limited to these descriptions. Any approximation, similarity, or replacement of the method, structure, etc. of the present application, or any technical deduction or replacement made under the premise of the concept of the present application, should be considered as the protection scope of the present application.

Claims

1. A wide-angle high-pixel optical system, sequentially comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens from an object plane to an image plane along an optical axis, characterized in that: the first lens has a negative focal power, and a convex object side surface and a concave image side surface; the second lens has a negative focal power, and a convex object side surface and a concave image side surface; the third lens has a negative focal power, and a concave object side surface; the fourth lens has a positive focal power, and a concave object side surface and a convex image side surface; the fifth lens has a focal power; the sixth lens has a positive focal power, and a convex object side surface and a convex image side surface; the seventh lens has a positive focal power, and a convex object side surface and a convex image side surface; the eighth lens has a negative focal power, and a concave object side surface and a concave image side surface; the ninth lens has a positive focal power, and a convex object side surface and a convex image side surface; each lens of the optical system satisfies the following conditions: -40.0 < f1 < 0.0 mm; -100.0 < f2 < -5.0 mm; -40.0 < f3 < -8.0 mm; 6.0 < f4 < 150.0 mm; 3.0 < f5 < 50.0 mm; 5.0 < f6 < 30.0 mm; 1.0 < f7 < 20.0 mm; -20.0 < f8 < -5.0 mm; -40.0 < f78 < -5.0 mm; 3.0 < f9 < 30.0 mm; f6 / f7 ≥ 2.50; 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, f7 is the focal length of the seventh lens, f8 is the focal length of the eighth lens, f78 is the combined focal length of the seventh lens and the eighth lens, and f9 is the focal length of the ninth lens. each lens of the optical system satisfies the following conditions: -20.0 < f1 / f < 2.0; -40.0 < f2 / f < 0.0; -20.0 < f3 / f < 2.0; 60.0 < f4 / f < 1.0; 25.0 < f5 / f < 1.0; 10.0 < f6 / f < 0.5; 6.0 < f7 / f < 0.1; -8.0 < f8 / f < 4.3; -20.0 < f78 / f < 1.5; 10.0 < f9 / f < 0.0; 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, f7 is the focal length of the seventh lens, f8 is the focal length of the eighth lens, f78 is the combined focal length of the seventh lens and the eighth lens, and f9 is the focal length of the ninth lens. the optical system satisfies the following relationship: 0.13 < f / TTL*ImagH < 0.71; ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The wide-angle high-pixel optical system according to claim 1, characterized by: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 3. The wide-angle high-pixel optical system according to any one of claims 1-2, characterized in that: ​ ​ Wherein, f is the effective focal length of the optical imaging system, TTL is the on-axis distance from the first lens object side to the imaging surface, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface.

4. The wide-angle high-pixel optical system according to any one of claims 1 to 2, characterized by: The lenses of the optical system satisfy the following conditions: the material refractive index Nd1 and the material Abbe number Vd1 of the first lens satisfy 1.69 < Nd1 < 2.00 and 25 < Vd1 < 57; the material refractive index Nd2 and the material Abbe number Vd2 of the second lens satisfy 1.50 < Nd2 < 1.70 and 15 < Vd2 < 60; the material refractive index Nd3 and the material Abbe number Vd3 of the third lens satisfy 1.50 < Nd3 < 1.70 and 15 < Vd3 < 60.

5. The wide-angle high-pixel optical system according to any one of claims 1-2, characterized in that: the material refractive index Nd4 and the material Abbe number Vd4 of the fourth lens satisfy 1.50 < Nd4 < 2.00 and 17 < Vd4 < 68; the material refractive index Nd5 and the material Abbe number Vd5 of the fifth lens satisfy 1.50 < Nd5 < 2.00 and 17 < Vd5 < 68; the material refractive index Nd6 and the material Abbe number Vd6 of the sixth lens satisfy 1.50 < Nd6 < 1.70 and 15 < Vd6 < 60.

6. The wide-angle high-pixel optical system according to any one of claims 1 to 2, characterized by: the material refractive index Nd7 and the material Abbe number Vd7 of the seventh lens satisfy 1.43 < Nd7 < 1.62 and 63 < Vd7 < 95; the material refractive index Nd8 and the material Abbe number Vd8 of the eighth lens satisfy 1.50 < Nd8 < 2.00 and 17 < Vd8 < 68; the material refractive index Nd9 and the material Abbe number Vd9 of the ninth lens satisfy 1.50 < Nd9 < 1.70 and 15 < Vd9 < 60.

7. The wide-angle high-pixel optical system according to any one of claims 1 to 2, characterized by: The system stop is located between the fifth lens and the sixth lens.

8. The wide-angle high-pixel optical system according to any one of claims 1 to 2, characterized by: The first lens, the fourth lens, the fifth lens, the seventh lens and the eighth lens are spherical lenses, and the second lens, the third lens, the sixth lens and the ninth lens are plastic aspherical lenses.

9. An image capturing module comprising at least an optical lens, characterized in that: The optical lens is internally mounted with the wide-angle high-pixel optical system according to any one of claims 1-8.

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