Super-large-aperture wide-angle high-pixel optical system and camera module applying same

Abstract

The utility model provides an ultra-large aperture wide-angle high-pixel optical system and a camera module using the same, the ultra-large aperture wide-angle high-pixel optical system is mainly composed of nine lenses, the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative focal power, and the object 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, and the object side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has positive focal power, and the image side surface of the sixth lens is a convex surface; the seventh lens has negative focal power, and the image side surface of the seventh lens is a concave surface; the eighth lens has positive focal power, the object side surface of the eighth lens is a convex surface, and the image side surface of the eighth lens is a convex surface; the ninth lens has focal power; through reasonable matching of the lens shape and the focal power, the lens has the advantages of ultra-large aperture, wide angle and high pixel, and meanwhile, the configuration of the large aperture can increase the light incoming amount of the optical system and improve the imaging quality.

Description

Technical Field

[0001] The present application relates to the field of optical imaging, and in particular to an ultra-large aperture, wide-angle, high-pixel optical system for security monitoring in the consumer field and a camera module using the same. Background Art

[0002] With the rapid development of camera lenses in the field of security monitoring, people have higher and higher requirements for the image quality of lenses in extremely dark environments. Not only do they need the images to be bright enough, but they also need to have high clarity. However, the images taken by the lenses currently on the market in extremely dark environments are dark, noisy, and have low recognition, which cannot meet the higher demands of users. To achieve clear imaging in extremely dark environments, the lens needs to have a larger aperture, and in order to achieve high pixels of the lens, the field of view of the optical system needs to be increased, which will be more competitive in the market. Utility Model Content

[0003] The present application aims to solve the technical problems of dark shooting pictures, large noise and low recognition of existing lenses, and to provide an optical system with the advantages of ultra-large aperture, wide angle and high pixel. At the same time, the configuration of large aperture can increase the amount of light entering the optical system and achieve higher imaging quality.

[0004] An ultra-large aperture wide-angle high-pixel optical system, 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 in sequence from an object plane to an image plane along an optical axis;

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

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

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

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

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

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

[0011] The seventh lens has negative optical power, and its image side surface is concave;

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

[0013] The ninth lens has optical power.

[0014] Preferably, the optical system satisfies the following relationship: 0.54 <f / TTL*ImagH<0.71;

[0015] 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 surface, and ImagH is half of the diagonal length of the effective pixel area on the imaging surface.

[0016] Preferably, each lens of the optical system satisfies the following conditions:

[0017] -10.0mm <f1<-5.2mm;

[0018] -15.0mm <f2<-6.2mm;

[0019] 6.3mm <f3<12.8mm;

[0020] 10.4mm <f4<40.0mm;

[0021] 8.5mm <f5<50.0mm;

[0022] 20.1mm <f6<53.6mm;

[0023] -6.9mm <f7<-1.5mm;

[0024] 4.2mm <f8<7.5mm;

[0025] 0.5mm <f78 / f9<4.3mm;

[0026] Where f1 is the focal length of the first lens, f2 is the focal length of the second lens, and f3 is the focal length of the third lens.

[0027] 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

[0028] f8 is the focal length of the seventh lens, f9 is the focal length of the eighth lens, and f7 is the focal length of the ninth lens.

[0029] Preferably, each lens of the optical system satisfies the following conditions:

[0030] -2.5 <f1 / f<0;

[0031] -5.0 <f2 / f<-1.5;

[0032] 2.0 <f3 / f<5.0;

[0033] 2.0 <f4 / f<9.0;

[0034] 2.5 <f5 / f<12.3;

[0035] 2.0 <f6 / f<13.0;

[0036] -2.0 <f7 / f<1.0;

[0037] 0.0 <f8 / f<3.0;

[0038] -40.0 <f9 / f<40.0;

[0039] Among them, 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, and f9 is the focal length of the ninth lens.

[0040] Preferably, the material refractive index Nd1 and the material Abbe constant Vd1 of the first lens satisfy: 1.60 <Nd1<1.95,30<Vd1<60。

[0041] Preferably, the material refractive index Nd2 and the material Abbe number Vd2 of the second lens satisfy: 1.52 <Nd2<1.75,15<Vd2<35。

[0042] Preferably, the material refractive index Nd3 and the material Abbe number Vd3 of the third lens satisfy: 1.75 <Nd3<1.95,17.5<Vd3<40。

[0043] Preferably, the material refractive index Nd4 and the material Abbe number Vd4 of the fourth lens satisfy: 1.52 <Nd4<1.75,15<Vd4<35。

[0044] Preferably, the material refractive index Nd5 and the material Abbe number Vd5 of the fifth lens satisfy: 1.35 <Nd5<1.65,70<Vd5<85。

[0045] Preferably, the material refractive index Nd6 and the material Abbe number Vd6 of the sixth lens satisfy: 1.42 <Nd6<1.65,45<Vd6<70。

[0046] Preferably, the material refractive index Nd7 and the material Abbe number Vd7 of the seventh lens satisfy: 1.65 <Nd7<1.95,17.5<Vd7<35。

[0047] Preferably, the material refractive index Nd8 and the material Abbe number Vd8 of the eighth lens satisfy: 1.45 <Nd8<1.7,55<Vd8<76。

[0048] Preferably, the material refractive index Nd9 and the material Abbe number Vd9 of the ninth lens satisfy: 1.43 <Nd9<1.66,41<Vd9<62。

[0049] Preferably, the optical system satisfies the following relationship: D1 / (Fno*Ymax)<3.5, wherein D1 is the maximum effective diameter of the first lens, Fno is the system aperture, and Ymax is the maximum image circle radius of the system.

[0050] Preferably, the first lens, the third lens, the fifth lens, the seventh lens and the eighth lens are spherical lenses, and the second lens, the fourth lens, the sixth lens and the ninth lens are plastic aspherical lenses.

[0051] On the other hand, an embodiment of the present application further provides a camera module, comprising at least an optical lens, wherein the optical lens is installed with the above-mentioned ultra-large aperture, wide-angle, high-pixel optical system.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] The utility model provides an ultra-large aperture wide-angle high-pixel optical system and a camera module applied thereto, which is mainly composed of 9 lenses, wherein the first lens has negative optical power, and its object side surface is convex, and its image side surface is concave; the second lens has negative optical power, and its object side surface is concave; the third lens has positive optical power, and its object side surface is convex, and its image side surface is convex; the fourth lens has positive optical power, and its object side surface is convex; the fifth lens has positive optical power, and its object side surface is convex, and its image side surface is convex; the sixth lens has positive optical power, and its image side surface is convex; the seventh lens has negative optical power, and its image side surface is concave; the eighth lens has positive optical power, and its object side surface is convex, and its image side surface is convex; the ninth lens has optical power, and through the reasonable matching of lens shape and optical power, it has the advantages of ultra-large aperture, wide angle, and high pixel, and at the same time, the configuration of large aperture can increase the amount of light entering the optical system and higher imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for describing the embodiments are briefly introduced below.

[0055] Figure 1 It is a structural schematic diagram of the optical system or camera module of Example 1 of the present application;

[0056] Figure 2 is the astigmatism and distortion curve of the optical system or camera module of Example 1 of the present application;

[0057] Figure 3 is the MTF curve of the optical system or camera module of Example 1 of the present application;

[0058] Figure 4 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 2 of the present application;

[0059] Figure 5 is the astigmatism and distortion curve of the optical system or camera module of Example 2 of the present application;

[0060] Figure 6 is the MTF curve of the optical system or camera module of Example 2 of the present application;

[0061] Figure 7 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 3 of the present application;

[0062] Figure 8 is the astigmatism and distortion curve of the optical system or camera module of Example 3 of the present application;

[0063] Fig. 9 is the MTF curve of the optical system or camera module of Example 3 of the present application;

[0064] Fig.10 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 4 of the present application;

[0065] Fig.11 is the astigmatism and distortion curve of the optical system or camera module of Example 4 of the present application;

[0066] Fig.12 is the MTF curve of the optical system or camera module of Example 4 of the present application;

[0067] Fig.13 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 5 of the present application;

[0068] Fig.14 is the astigmatism and distortion curve of the optical system or camera module of Example 5 of the present application;

[0069] Fig.15 It is the MTF curve of the optical system or camera module of Example 5 of the present application. DETAILED DESCRIPTION

[0070] like Figure 1-15 As shown, the present application provides an ultra-large aperture wide-angle high-pixel optical system, which includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a ninth lens E9 in sequence from the object plane to the image plane along the optical axis;

[0071] The first lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0072] The second lens has negative optical power, and its object side surface is concave;

[0073] The third lens has a positive optical power, its object side is convex, and its image side is convex;

[0074] The fourth lens has a positive optical power, and its object side is convex;

[0075] The fifth lens has a positive optical power, its object side is convex, and its image side is convex;

[0076] The sixth lens has a positive optical power, and its image side is convex;

[0077] The seventh lens has a negative optical power, and its image side is concave;

[0078] The eighth lens has a positive optical power, its object side is convex, and its image side is convex;

[0079] The ninth lens has an optical power.

[0080] The optical system according to the embodiment of the present application mainly consists of nine lenses. Through reasonable matching of the lens shapes and optical powers, it has the advantages of a super large aperture, wide angle, and high pixels. At the same time, the configuration of a large aperture can increase the light input of the optical system and higher imaging quality.

[0081] Furthermore, the optical system satisfies the following relationship: 0.54 < f / TTL * ImagH < 0.71; where f is the effective focal length of the optical system, TTL is the axial distance from the object side of the first lens E1 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 conditions of the optical lens in terms of the field of view angle and thin and light characteristics. When the above relational expression is satisfied, it can meet the market's requirements 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. 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 below the lower limit of the relational expression, the thin and light characteristics of the optical lens are insufficient, which is not conducive to the miniaturization design of the optical lens.

[0082] Further, each lens of the optical system satisfies the following conditions: -10.0 mm < f1 < -5.2 mm; -15.0 mm < f2 < -6.2 mm; 6.3 mm < f3 < 12.8 mm; 10.4 mm < f4 < 40.0 mm; 8.5 mm < f5 < 50.0 mm; 20.1 mm < f6 < 53.6 mm; -6.9 mm < f7 < -1.5 mm; 4.2 mm < f8 < 7.5 mm; 0.5 mm < f78 / f9 < 4.3 mm; where f1 is the focal length of the first lens E1, f2 is the focal length of the second lens E2, f3 is the focal length of the third lens E3, f4 is the focal length of the fourth lens E4, f5 is the focal length of the fifth lens E5, f6 is the focal length of the sixth lens E6, f7 is the focal length of the seventh lens E7, f8 is the focal length of the eighth lens E8, and f9 is the focal length of the ninth lens E9. By reasonably controlling the effective focal lengths of the lenses of the optical system, the optical system can satisfy a large field of view angle while restricting the effective diameter of the components, controlling the size of the overall optical system, and adjusting the light incident angle, which is beneficial to correcting the system aberration.

[0083] Further, each lens of the optical system satisfies the following conditions: -2.5 < f1 / f < 0; -5.0 < f2 / f < -1.5; 2.0 < f3 / f < 5.0; 2.0 < f4 / f < 9.0; 2.5 < f5 / f < 12.3; 2.0 < f6 / f < 13.0; -2.0 < f7 / f < 1.0; 0.0 < f8 / f < 3.0; -40.0 < f9 / f < 40.0; where f is the focal length of the entire optical system, f1 is the focal length of the first lens E1, f2 is the focal length of the second lens E2, f3 is the focal length of the third lens E3, f4 is the focal length of the fourth lens E4, f5 is the focal length of the fifth lens E5, f6 is the focal length of the sixth lens E6, f7 is the focal length of the seventh lens E7, f8 is the focal length of the eighth lens E8, and f9 is the focal length of the ninth lens E9. By restricting the ratio of the focal lengths of each lens and the optical system within a reasonable range, both the excellent image quality of the optical system and the good processability of the system are ensured.

[0084] Furthermore, the refractive index Nd1 and Abbe number Vd1 of the material of the first lens E1 satisfy: 1.60 < Nd1 < 1.95, 30 < Vd1 < 60. The refractive index Nd2 and Abbe number Vd2 of the material of the second lens E2 satisfy: 1.52 < Nd2 < 1.75, 15 < Vd2 < 35. The refractive index Nd3 and Abbe number Vd3 of the material of the third lens E3 satisfy: 1.75 < Nd3 < 1.95, 17.5 < Vd3 < 40. The refractive index Nd4 and Abbe number Vd4 of the material of the fourth lens E4 satisfy: 1.52 < Nd4 < 1.75, 15 < Vd4 < 35. The refractive index Nd5 and Abbe number Vd5 of the material of the fifth lens E5 satisfy: 1.35 < Nd5 < 1.65, 70 < Vd5 < 85. The refractive index Nd6 and Abbe number Vd6 of the material of the sixth lens E6 satisfy: 1.42 < Nd6 < 1.65, 45 < Vd6 < 70. The refractive index Nd7 and Abbe number Vd7 of the material of the seventh lens E7 satisfy: 1.65 < Nd7 < 1.95, 17.5 < Vd7 < 35. The refractive index Nd8 and Abbe number Vd8 of the material of the eighth lens E8 satisfy: 1.45 < Nd8 < 1.7, 55 < Vd8 < 76. The refractive index Nd9 and Abbe number Vd9 of the material of the ninth lens E9 satisfy: 1.43 < Nd9 < 1.66, 41 < Vd9 < 62. 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.

[0085] Furthermore, the optical system satisfies the following relationship: D1 / (Fno * Ymax) < 3.5. Wherein, D1 is the maximum effective diameter of the first lens, Fno is the system aperture, and Ymax is the maximum image circle radius of the system. Through the reasonable design of the large field of view angle of the optical system, the actual requirements of the ultra-wide angle of the optical system are effectively met.

[0086] Furthermore, the first lens E1, the third lens E3, the fifth lens E5, the seventh lens E7, and the eighth lens E8 are spherical lenses, and the second lens E2, the fourth lens E4, the sixth lens E6, and the ninth lens E9 are plastic aspherical lenses. By reasonably distributing the lens surface types, optimizing the lens aberration, and improving the resolution performance, it has the advantages of a super large aperture, wide angle, and high pixels.

[0087] Example 1

[0088] 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.

[0089] As Figure 1As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, 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 focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S8 is convex, and its image side surface S9 is convex. The fifth lens E5 has positive focal power, and its object side surface S10 is convex, and its image side surface S11 is convex. The sixth lens E6 has positive focal power, and its object side surface S12 is concave, and its image side surface S13 is convex. The seventh lens E7 has negative focal power, and its object side surface S14 is concave, and its image side surface S15 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is convex. The ninth lens E9 has positive refractive power, and its object side surface S17 is convex, and its image side surface S18 is concave. The filter E10 has an object side surface S19 and an image side surface S20. Light from the object passes through each surface S1 to S20 in sequence and is finally imaged on the imaging surface S21.

[0091] Table 1 shows the surface type, curvature radius, thickness and material of each lens of the optical imaging lens of Example 1, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0092] Table 1

[0093]

[0094] In Table 2, any one of the object side and image side of the second lens E2, the fourth lens E4, and the sixth lens E6 to the ninth lens E9 is an aspherical surface, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0095]

[0096] Wherein, x is the distance from the corresponding point on the aspheric surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspheric surface to the optical axis, c is the curvature of the vertex of the aspheric surface, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspheric surface shape formula. Table 2 shows the cone coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspheric surface that can be used in the first embodiment.

[0097] Table 2

[0098]

[0099] Figure 2 The astigmatism and distortion curves of the optical imaging lens of Example 1 are shown. Astigmatism refers to the meridional image curvature and the sagittal image curvature; and distortion refers to the distortion magnitude values ​​corresponding to different image heights.

[0100] Figure 3 The MTF curve of the optical imaging lens of Example 1 is shown, which represents the MTF values ​​in the meridian direction and sagittal direction of different fields of view.

[0101] The optical imaging lens provided in Example 1 can achieve good imaging quality.

[0102] Embodiment 2

[0103] The following reference Figures 4 to 6 An optical imaging lens according to Embodiment 2 of the present application is described. Figure 4 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown.

[0104] like Figure 4 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10 and an imaging surface S21.

[0105] The first lens E1 has negative focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S8 is convex, and its image side surface S9 is convex. The fifth lens E5 has positive focal power, and its object side surface S10 is convex, and its image side surface S11 is convex. The sixth lens E6 has positive focal power, and its object side surface S12 is concave, and its image side surface S13 is convex. The seventh lens E7 has negative focal power, and its object side surface S14 is concave, and its image side surface S15 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is convex. The ninth lens E9 has negative power, and its object side surface S17 is concave, and its image side surface S18 is concave. The filter E10 has an object side surface S19 and an image side surface S20. Light from the object passes through each surface S1 to S20 in sequence and is finally imaged on the imaging surface S21.

[0106] Table 3 shows the surface type, curvature radius, thickness and material of each lens of the optical imaging lens of Example 2, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0107] Table 3

[0108]

[0109] In Table 4, any one of the object side and image side of the second lens E2, the fourth lens E4, and the sixth lens E6 to the ninth lens E9 is an aspherical surface, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0110]

[0111] Wherein, x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula. Table 4 shows the cone coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface that can be used in the second embodiment.

[0112] Table 4

[0113]

[0114] Figure 5 The astigmatism and distortion curves of the optical imaging lens of Example 2 are shown. Astigmatism refers to the meridional image curvature and the sagittal image curvature; and distortion refers to the distortion magnitude values ​​corresponding to different image heights.

[0115] Figure 6 The MTF curve of the optical imaging lens of Example 2 is shown, which represents the MTF values ​​in the meridian direction and sagittal direction of different fields of view.

[0116] The optical imaging lens provided in Example 2 can achieve good imaging quality.

[0117] Embodiment 3

[0118] The following reference Figures 7 to 9 An optical imaging lens according to Embodiment 3 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0119] like Figure 7As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10 and an imaging surface S21.

[0120] The first lens E1 has negative focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive focal power, and its object side surface S6 is convex, and its image side surface S7 is convex. The fourth lens E4 has positive focal power, and its object side surface S8 is convex, and its image side surface S9 is convex. The fifth lens E5 has positive focal power, and its object side surface S10 is convex, and its image side surface S11 is convex. The sixth lens E6 has positive focal power, and its object side surface S12 is convex, and its image side surface S13 is convex. The seventh lens E7 has negative focal power, and its object side surface S14 is concave, and its image side surface S15 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is convex. The ninth lens E9 has positive refractive power, and its object side surface S17 is convex, and its image side surface S18 is concave. The filter E10 has an object side surface S19 and an image side surface S20. Light from the object passes through each surface S1 to S20 in sequence and is finally imaged on the imaging surface S21.

[0121] Table 5 shows the surface type, curvature radius, thickness and material of each lens of the optical imaging lens of Example 3, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0122] Table 5

[0123]

[0124] In Table 6, any one of the object side and image side of the second lens E2, the fourth lens E4, and the sixth lens E6 to the ninth lens E9 is an aspherical surface, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0125]

[0126] Wherein, x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula. Table 6 shows the cone coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface that can be used in the third embodiment.

[0127] Table 6

[0128]

[0129] Figure 8 The astigmatism and distortion curves of the optical imaging lens of Example 3 are shown. Astigmatism refers to the meridional image curvature and the sagittal image curvature; and distortion refers to the distortion magnitude values ​​corresponding to different image heights.

[0130] Fig. 9 The MTF curve of the optical imaging lens of Example 3 is shown, which represents the MTF values ​​in the meridian direction and sagittal direction of different fields of view.

[0131] The optical imaging lens provided in Example 3 can achieve good imaging quality.

[0132] Embodiment 4:

[0133] The following reference Figures 10 to 12 An optical imaging lens according to Embodiment 4 of the present application is described. Fig.10 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown.

[0134] like Fig.10 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10 and an imaging surface S21.

[0135] The first lens E1 has negative focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S10 is convex, and its image side surface S11 is convex. The sixth lens E6 has positive focal power, and its object side surface S12 is convex, and its image side surface S13 is convex. The seventh lens E7 has negative focal power, and its object side surface S14 is concave, and its image side surface S15 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is convex. The ninth lens E9 has positive refractive power, and its object side surface S17 is convex, and its image side surface S18 is concave. The filter E10 has an object side surface S19 and an image side surface S20. Light from the object passes through each surface S1 to S20 in sequence and is finally imaged on the imaging surface S21.

[0136] Table 7 shows the surface type, curvature radius, thickness and material of each lens of the optical imaging lens of Example 4, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0137] Table 7

[0138]

[0139] In Table 8, any one of the object side and image side of the second lens E2, the fourth lens E4, and the sixth lens E6 to the ninth lens E9 is an aspherical surface, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0140]

[0141] Wherein, x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula. Table 8 shows the cone coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface that can be used in the fourth embodiment.

[0142] Table 8

[0143]

[0144] Fig.11 The astigmatism and distortion curves of the optical imaging lens of Example 4 are shown. Astigmatism refers to the meridional image curvature and the sagittal image curvature; and distortion refers to the distortion magnitude values ​​corresponding to different image heights.

[0145] Fig.12 The MTF curve of the optical imaging lens of Example 4 is shown, which represents the MTF values ​​in the meridian direction and sagittal direction of different fields of view.

[0146] The optical imaging lens provided in Example 4 can achieve good imaging quality.

[0147] Embodiment 5

[0148] The following reference Figures 13 to 15 An optical imaging lens according to Embodiment 5 of the present application is described. Fig.13 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown.

[0149] like Fig.13As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10 and an imaging surface S21.

[0150] The first lens E1 has negative focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S8 is convex, and its image side surface S9 is convex. The fifth lens E5 has positive focal power, and its object side surface S10 is convex, and its image side surface S11 is convex. The sixth lens E6 has positive focal power, and its object side surface S12 is convex, and its image side surface S13 is convex. The seventh lens E7 has negative focal power, and its object side surface S14 is concave, and its image side surface S15 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is convex. The ninth lens E9 has positive refractive power, and its object side surface S17 is convex, and its image side surface S18 is concave. The filter E10 has an object side surface S19 and an image side surface S20. Light from the object passes through each surface S1 to S20 in sequence and is finally imaged on the imaging surface S21.

[0151] Table 9 shows the surface type, curvature radius, thickness and material of each lens of the optical imaging lens of Example 5, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0152] Table 9

[0153]

[0154] In Table 10, any one of the object side and image side of the second lens E2, the fourth lens E4, and the sixth lens E6 to the ninth lens E9 is an aspherical surface, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0155]

[0156] Wherein, x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula. Table 10 shows the cone coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface that can be used in the fifth embodiment.

[0157] Table 10

[0158]

[0159] Fig.14 The astigmatism and distortion curves of the optical imaging lens of Example 5 are shown. Astigmatism refers to the meridional image curvature and the sagittal image curvature; and distortion refers to the distortion magnitude values ​​corresponding to different image heights.

[0160] Fig.15 The MTF curve of the optical imaging lens of Example 5 is shown, which represents the MTF values ​​in the meridian direction and sagittal direction of different fields of view.

[0161] The optical imaging lens provided in Example 5 can achieve good imaging quality.

[0162] A camera module includes at least an optical lens, in which the above-mentioned vehicle-mounted optical system is installed. The camera module has the advantages of ultra-large aperture, wide angle and high pixel. At the same time, the configuration of large aperture can increase the amount of light entering the optical system and higher imaging quality, and has better application prospects in the field of security monitoring.

[0163] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of the utility model is not limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or a number of technical deductions or replacements based on the concept of the utility model, shall be regarded as the protection scope of the utility model.

Claims

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

2. The ultra-large aperture wide-angle high-pixel optical system according to claim 1, characterized in that: Each lens of the optical system meets the following conditions: -10.0mm <f1<-5.2mm; -15.0mm <f2<-6.2mm; 6.3mm <f3<12.8mm; 10.4mm <f4<40.0mm; 8.5mm <f5<50.0mm; 20.1mm <f6<53.6mm; -6.9mm <f7<-1.5mm; 4.2mm <f8<7.5mm; 0.5mm< f78 / f9<4.3mm; Among them, 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, and f9 is the focal length of the ninth lens.

3. The ultra-large aperture wide-angle high-pixel optical system according to claim 1, characterized in that: Each lens of the optical system meets the following conditions: -2.5 <f1 / f<0; -5.0 <f2 / f<-1.5; 2.0 <f3 / f<5.0; 2.0 <f4 / f<9.0; 2.5 <f5 / f<12.3; 2.0 <f6 / f<13.0; -2.0 <f7 / f<1.0; 0.0 <f8 / f<3.0; -40.0 <f9 / f<40.0; Among them, 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, and f9 is the focal length of the ninth lens.

4. The ultra-large aperture wide-angle high-pixel optical system according to any one of claims 1 to 3, characterized in that: The optical system satisfies the following relationship: 0.54 < f / TTL*ImagH < 0.71; 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 surface, and ImagH is half of the diagonal length of the effective pixel area on the imaging surface.

5. The ultra-large aperture, wide-angle, high-pixel optical system according to any one of claims 1 to 3, characterized in that: The material refractive index Nd1 and material Abbe constant Vd1 of the first lens satisfy: 1.60 <Nd1<1.95,30<Vd1<60; The material refractive index Nd2 and material Abbe number Vd2 of the second lens meet the following requirements: 1.52 <Nd2<1.75,15<Vd2<35; The material refractive index Nd3 and the material Abbe number Vd3 of the third lens meet the following requirements: 1.75 <Nd3<1.95,17.5<Vd3<40。 6. The ultra-large aperture wide-angle high-pixel optical system according to any one of claims 1 to 3, characterized in that: The material refractive index Nd4 and the material Abbe number Vd4 of the fourth lens satisfy: 1.52 <Nd4<1.75,15<Vd4<35; The material refractive index Nd5 and the material Abbe number Vd5 of the fifth lens satisfy: 1.35 <Nd5<1.65,70<Vd5<85; The material refractive index Nd6 and the material Abbe number Vd6 of the sixth lens satisfy: 1.42 <Nd6<1.65,45<Vd6<70。 7. The ultra-large aperture, wide-angle, high-pixel optical system according to any one of claims 1 to 3, characterized in that: The material refractive index Nd7 and the material Abbe number Vd7 of the seventh lens satisfy: 1.65 <Nd7<1.95,17.5<Vd7<35; The material refractive index Nd8 and the material Abbe number Vd8 of the eighth lens satisfy: 1.45 <Nd8<1.7,55<Vd8<76; The material refractive index Nd9 and the material Abbe number Vd9 of the ninth lens satisfy: 1.43 <Nd9<1.66,41<Vd9<62。 8. The ultra-large aperture, wide-angle, high-pixel optical system according to any one of claims 1 to 3, characterized in that: The optical system satisfies the following relationship: D1 / (Fno*Ymax)<3.5; Wherein, D1 is the maximum effective diameter of the first lens, Fno is the system aperture, and Ymax is the maximum image circle radius of the system.

9. The ultra-large aperture wide-angle high-pixel optical system according to any one of claims 1 to 3, characterized in that: The first lens, the third lens, the fifth lens, the seventh lens and the eighth lens are spherical lenses, and the second lens, the fourth lens, the sixth lens and the ninth lens are plastic aspherical lenses.

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

Images