Wide-angle high-pixel optical system and camera module applied by same

Abstract

The utility model provides a wide-angle high-pixel optical system and a camera module applying the same, mainly comprising nine lenses, the first lens has negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens has negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface; the third lens has negative focal power, and the object side surface is a concave surface; the fourth lens has positive focal power, the object side surface is a concave surface, and the image side surface is a convex surface; the fifth lens has focal power; the sixth lens has positive focal power, the object side surface is a convex surface, and the image side surface is a convex surface; the seventh lens has positive focal power, the object side surface is a convex surface, and the image side surface is a convex surface; the eighth lens has negative focal power, the object side surface is a concave surface, and the image side surface is a concave surface; the ninth lens has positive focal power, the object side face is a convex face, the image side face is a convex face, and the advantages of wide angle and high pixel are achieved.

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 by the wide-angle high-pixel optical system. BACKGROUND

[0002] With the rapid development of the camera lens in the field of electronic rearview mirror, people have higher and higher requirements for the safety and cost of the lens, not only the picture needs to be bright enough, but also needs to have 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 demand of users; if the user's imaging clarity is to be met, the high pixel of the lens will have great competitiveness in the market. CONTENT OF THE INVENTION

[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 along the optical axis from the object plane to the image plane;

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

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

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

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

[0010] The fifth lens has focal power;

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

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

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

[0014] The ninth lens has positive focal power, the object side surface is convex, and the 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] 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, 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 and eighth lenses, and f9 is the focal length of the ninth lens.

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

[0040] Where 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 described above satisfies the following relationship:

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

[0043] Where f is the effective focal length of the optical imaging system, TTL is the on-axis distance from the object side of the first lens to the imaging surface, and ImgH is half the diagonal length of the effective pixel area on the imaging surface.

[0044] The wide-angle, high-pixel optical system described above requires each lens to satisfy the following condition: the refractive index Nd1 and Abbe constant Vd1 of the first lens material satisfy: 1.69. <Nd1<2.00,25<Vd1<57。

[0045] In the wide-angle, high-pixel optical system described above, the refractive index Nd2 and Abbe number Vd2 of the second lens material satisfy: 1.50 <Nd2<1.70,15<Vd2<60。

[0046] In the wide-angle, high-pixel optical system described above, the refractive index Nd3 and Abbe number Vd3 of the third lens material satisfy: 1.50 <Nd3<1.70,15<Vd3<60。

[0047] In the wide-angle, high-pixel optical system described above, the refractive index Nd4 and Abbe number Vd4 of the fourth lens material satisfy: 1.50. <Nd4<2.00,17<Vd4<68。

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

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

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

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

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

[0053] In the wide-angle, high-pixel optical system described above, the system aperture is located between the fifth and sixth lenses.

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

[0055] On the other hand, this application embodiment also provides a camera module, which includes at least an optical lens, and the aforementioned wide-angle high-pixel optical system is installed in the optical lens.

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

[0057] This utility model provides a wide-angle, high-pixel optical system and its application in a camera module, which is mainly composed of 9 lenses. The number of lenses is reasonable and the structure is simple. By rationally allocating the optical power of the lenses, the lens aberration is optimized and the resolution performance is improved. It has the advantages of wide angle and high pixel, meets the user's clear imaging needs, and achieves high pixel count, making electronic rearview mirrors in the automotive field more competitive in the market. Attached Figure Description

[0058] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0059] Figure 1This is a schematic diagram of the structure of the optical system or camera module in Embodiment 1 of this application;

[0060] Figure 2 This refers to the astigmatism and distortion curves of the optical system or camera module in Embodiment 1 of this application;

[0061] Figure 3 This is the MTF curve of the optical system or camera module of Embodiment 1 of this application;

[0062] Figure 4 This is a schematic diagram of the structure of the optical system or camera module in Embodiment 2 of this application;

[0063] Figure 5 This refers to the astigmatism and distortion curves of the optical system or camera module in Embodiment 2 of this application;

[0064] Figure 6 This is the MTF curve of the optical system or camera module in Embodiment 2 of this application;

[0065] Figure 7 This is a schematic diagram of the structure of the optical system or camera module in Embodiment 3 of this application;

[0066] Figure 8 This refers to the astigmatism and distortion curves of the optical system or camera module in Embodiment 3 of this application;

[0067] Figure 9 This is the MTF curve of the optical system or camera module in Embodiment 3 of this application. Detailed Implementation

[0068] like Figures 1-9As shown in the figure, the present application provides a day-night confocal wide-angle optical system, which is sequentially composed of a first lens E1, a second lens E2, a third lens E3, an aperture 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 the optical axis from the object plane to the image plane; 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 first lens has a negative optical power, its object side is convex, and its image side is concave; the second lens has a negative optical power, its object side is convex, and its image side is concave; the third lens has a negative optical power, and its object side is concave; the fourth lens has a positive optical power, its object side is concave, and its image side is convex; the fifth lens has an optical power; the sixth lens has a positive optical power, its object side is convex, and its image side is convex; the seventh lens has a positive optical power, its object side is convex, and its image side is convex; the eighth lens has a negative optical power, its object side is concave, and its image side is concave; the ninth lens has a positive optical power, its object side is convex, and its image side is convex.

[0069] The optical system of the embodiment of the present application is mainly composed of 9 lenses. The number of lenses is reasonable and the structure is simple. By reasonably distributing the optical power of the lenses, optimizing the lens aberration, and improving the resolution performance, it has the advantages of wide angle and high pixel, meets the clear imaging requirements of users, realizes the high pixel of the lens, and makes the electronic rearview mirror applied in the vehicle field more competitive in the market.

[0070] Furthermore, as a preferred implementation manner rather than a limitation of the present invention, the lenses of the optical system satisfy 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; 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, 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 lengths of the lenses of the optical system, the optical system can meet the large field angle while restricting the effective diameter of the components, controlling the overall size of the optical system, and adjusting the light incident angle, which is beneficial to correcting the system aberration.

[0071] Further, as a preferred implementation manner of the present utility model rather than a limitation, 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; 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, 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 lengths of each lens to the effective focal length of the optical system, the optical system obtains a reasonable light deflection angle, effectively reduces the sensitivity of component tolerances, and improves system aberrations.

[0072] Further, as a preferred implementation manner of the present utility model rather than a limitation, the optical system satisfies the following condition: f6 / f7 ≥ 2.50; where 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 can be improved.

[0073] For the wide-angle high-pixel optical system as described above, the optical system satisfies the following relationship: 0.13 < f / TTL * ImagH < 0.71; 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 ImgH 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 angle and thin and light characteristics. When the above relational expression is satisfied, the requirement for the thin and light nature of the optical lens can be realized while meeting the optical lens.

[0074] Further, as a preferred embodiment rather than a limitation of the present utility model, the lenses of the optical system satisfy the following conditions: The refractive index Nd1 and Abbe number Vd1 of the material of the first lens satisfy: 1.69 < Nd1 < 2.00, 25 < Vd1 < 57; the refractive index Nd2 and Abbe number Vd2 of the material of the second lens satisfy: 1.50 < Nd2 < 1.70, 15 < Vd2 < 60; the refractive index Nd3 and Abbe number Vd3 of the material of the third lens satisfy: 1.50 < Nd3 < 1.70, 15 < Vd3 < 60; the refractive index Nd4 and Abbe number Vd4 of the material of the fourth lens satisfy: 1.50 < Nd4 < 2.00, 17 < Vd4 < 68; the refractive index Nd5 and Abbe number Vd5 of the material of the fifth lens satisfy: 1.50 < Nd5 < 2.00, 17 < Vd5 < 68; the refractive index Nd6 and Abbe number Vd6 of the material of the sixth lens satisfy: 1.50 < Nd6 < 1.70, 15 < Vd6 < 60; the refractive index Nd7 and Abbe number Vd7 of the material of the seventh lens satisfy: 1.43 < Nd7 < 1.62, 63 < Vd7 < 95; the refractive index Nd8 and Abbe number Vd8 of the material of the eighth lens satisfy: 1.50 < Nd8 < 2.00, 17 < Vd8 < 68; the refractive index Nd9 and Abbe number Vd9 of the material of the ninth lens satisfy: 1.50 < Nd9 < 1.70, 15 < Vd9 < 60. By defining the relationship between the refractive index and 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 rather than a limitation of the present utility model, 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 combination of glass and plastic makes the lens have higher imaging quality and lower cost.

[0076] Specifically, as a preferred embodiment rather than a limitation of the present utility model, 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.

[0077] 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 third lens E3, a fourth lens E4, a fifth lens E5, 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 optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has optical power. The sixth lens E6 has positive optical power, with its object-side surface S12 being convex and its image-side surface S13 being convex. The seventh lens E7 has positive optical power, with its object-side surface S14 being convex and its image-side surface S15 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being concave. The ninth lens E9 has positive optical power, with its object-side surface S17 being convex and its image-side surface S18 being convex. The filter E10 has an object-side surface S19 and an image-side surface S20. Light from the object passes sequentially through each surface S1 to S20 and is finally imaged onto the imaging surface S21.

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

[0080] Table 1

[0081]

[0082] In Table 2, the object-side surface and image-side surface of any one of the following lenses—E2 (second lens), E3 (third lens), E6 (sixth lens), to E9 (ninth lens)—are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formulas:

[0083]

[0084] Where 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 higher-order term in the aspherical surface shape formula. Table 2 gives the conic coefficients and higher-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. Astigmatism represents the meridional image plane curvature and the sagittal image plane curvature; distortion represents the distortion magnitude corresponding to different image heights. Figure 3The MTF curves of the optical imaging lens of Example 1 are shown, representing the MTF values ​​in the meridional and sagittal directions for different fields of view. The optical imaging lens given in Example 1 achieves good imaging quality.

[0088] Specifically, as a preferred embodiment of the present invention and not a limitation thereof, the following references are made. Figures 4 to 6 Describes an optical imaging lens according to Embodiment 2 of this application. Figure 4 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown.

[0089] like Figure 4 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence 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 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 negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has optical power. The sixth lens E6 has positive optical power, with its object-side surface S12 being convex and its image-side surface S13 being convex. The seventh lens E7 has positive optical power, with its object-side surface S14 being convex and its image-side surface S15 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being concave. The ninth lens E9 has positive optical power, with its object-side surface S17 being convex and its image-side surface S18 being convex. The filter E10 has an object-side surface S19 and an image-side surface S20. Light from the object passes sequentially through each surface S1 to S20 and is finally imaged onto the imaging surface S21.

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

[0092] Table 3

[0093]

[0094] In Table 4, the object-side surface and image-side surface of any one of the following lenses—E2 (second lens), E3 (third lens), E6 (sixth lens), to E9 (ninth lens)—are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formulas:

[0095]

[0096] Where 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 higher-order term in the aspherical surface shape formula. Table 4 gives the conic coefficients and higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 for each aspherical surface that can be used in the second embodiment.

[0097] Table 4

[0098]

[0099] Specifically, as a preferred embodiment of the present invention and not a limitation thereof, the following references are made. Figures 7 to 9 Describes an optical imaging lens according to Embodiment 3 of this application. Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown.

[0100] Figure 5 The astigmatism and distortion curves of the optical imaging lens of Example 2 are shown. Astigmatism represents the meridional image plane curvature and the sagittal image plane curvature; distortion represents the distortion magnitude corresponding to different image heights. Figure 6 The MTF curves of the optical imaging lens of Example 2 are shown, representing the MTF values ​​in the meridional and sagittal directions for different fields of view. The optical imaging lens given in Example 2 achieves good imaging quality.

[0101] like Figure 7 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence 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 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 optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has optical power. The sixth lens E6 has positive optical power, with its object-side surface S12 being convex and its image-side surface S13 being convex. The seventh lens E7 has positive optical power, with its object-side surface S14 being convex and its image-side surface S15 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being concave. The ninth lens E9 has positive optical power, with its object-side surface S17 being convex and its image-side surface S18 being convex. The filter E10 has an object-side surface S19 and an image-side surface S20. Light from the object passes sequentially through each surface S1 to S20 and is finally imaged onto the imaging surface S21.

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

[0104] Table 5

[0105]

[0106] In Table 6, the object-side surface and image-side surface of any one of the following lenses—E2 (second lens), E3 (third lens), E6 (sixth lens), to E9 (ninth lens)—are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formulas:

[0107]

[0108] Where 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 higher-order term in the aspherical surface shape formula. Table 6 gives the conic coefficients and higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 for 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. Astigmatism represents the meridional image plane curvature and the sagittal image plane curvature; distortion represents the distortion magnitude corresponding to different image heights. Figure 9The MTF curves of the optical imaging lens of Example 3 are shown, representing the MTF values ​​in the meridional and sagittal directions for different fields of view. The optical imaging lens given in Example 3 achieves good imaging quality.

[0112] A camera lens includes at least an optical lens, in which the aforementioned wide-angle, high-pixel optical system is installed. The optical lens has a reasonable number of lenses and a simple structure. By rationally allocating the optical power of the lenses, the lens aberrations are optimized, and the resolution performance is improved. It has the advantages of wide-angle and high-pixel resolution, meeting the user's requirements for clear imaging and achieving high-pixel resolution. This makes the electronic rearview mirror used in the automotive field more competitive in the market.

[0113] The above description provides one or more embodiments in conjunction with specific content, and does not imply that the specific implementation of this utility model is limited to these descriptions. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the protection scope of this utility model.

Claims

1. A wide-angle, high-pixel optical system, comprising, in sequence along the optical axis from the object plane to the image plane, 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, characterized in that: The first lens has negative optical power, its object side is convex, and its image side is concave. The second lens has negative optical power, its object side is convex, and its image side is concave. The third lens has negative optical power and its object side is concave. The fourth lens has positive optical power, its object side is concave, and its image side is convex. The fifth lens has optical power; The sixth lens has positive optical power, its object side is convex, and its image side is concave. The seventh lens has positive optical power, and its object side is convex, and its image side is convex. The eighth lens has negative optical power, and its object side is concave, as is its image side. The ninth lens has positive optical power, and its object side is convex, as is its image side.

2. The wide-angle high-pixel optical system according to claim 1, characterized in that: Each lens in this optical system satisfies the following condition: -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; 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, 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 and eighth lenses, and f9 is the focal length of the ninth lens.

3. The wide-angle high-pixel optical system according to claim 1, characterized in that: Each lens in this optical system satisfies the following condition: -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; 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, 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 and eighth lenses, and f9 is the focal length of the ninth lens.

4. The wide-angle high-pixel optical system according to any one of claims 1-3, characterized in that: The optical system satisfies the following condition: f6 / f7 ≥ 2.50; Where f6 is the effective focal length of the sixth lens and f7 is the effective focal length of the seventh lens.

5. The wide-angle high-pixel optical system according to any one of claims 1-3, characterized in that: The optical system satisfies the following relationship: 0.13 < f / TTL*ImagH < 0.71; Where f is the effective focal length of the optical imaging system, TTL is the on-axis distance from the object side of the first lens to the imaging surface, and ImgH is half the diagonal length of the effective pixel area on the imaging surface.

6. The wide-angle high-pixel optical system according to any one of claims 1-3, characterized in that: The lenses of this optical system satisfy the following condition: the refractive index Nd1 and Abbe constant Vd1 of the first lens material satisfy: 1.

69. <Nd1<2.00,25<Vd1<57; The refractive index Nd2 and Abbe number Vd2 of the material of the second lens satisfy: 1.50 <Nd2<1.70,15<Vd2<60; The refractive index Nd3 and Abbe number Vd3 of the material of the third lens satisfy: 1.50 <Nd3<1.70,15<Vd3<60。 7. The wide-angle high-pixel optical system according to any one of claims 1-3, characterized in that: The refractive index Nd4 and Abbe number Vd4 of the fourth lens material satisfy: 1.50 <Nd4<2.00,17<Vd4<68; The refractive index Nd5 and Abbe number Vd5 of the fifth lens material satisfy: 1.50 <Nd5<2.00,17<Vd5<68; The sixth lens has a refractive index Nd6 and an Abbe number Vd6 that satisfy 1.

50. <Nd6<1.70,15<Vd6<60。 8. The wide-angle high-pixel optical system according to any one of claims 1-3, characterized in that: The refractive index Nd7 and Abbe number Vd7 of the seventh lens satisfy: 1.43 <Nd7<1.62,63<Vd7<95; The refractive index Nd8 and Abbe number Vd8 of the material of the eighth lens satisfy: 1.50 <Nd8<2.00,17<Vd8<68; The refractive index Nd9 and Abbe number Vd9 of the material of the ninth lens satisfy: 1.50 <Nd9<1.70,15<Vd9<60。 9. The wide-angle high-pixel optical system according to any one of claims 1-3, characterized in that: The first, fourth, fifth, seventh, and eighth lenses are spherical lenses, while the second, third, sixth, and ninth lenses are plastic aspherical lenses.

10. A camera module, comprising at least an optical lens, characterized in that: The optical lens is equipped with a wide-angle high-pixel optical system as described in any one of claims 1-9.

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