Low-distortion small-size high-pixel optical system and camera module applied by same

Abstract

The utility model provides a low-distortion small-volume high-pixel optical system and a camera module applying the same, the low-distortion small-volume high-pixel optical system is mainly composed of seven lenses, the first lens has negative focal power, and the image side surface of the first lens is a concave surface; the second lens has positive focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a convex surface; the third lens has focal power; the fourth lens has focal power; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has positive focal power, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a convex surface; the seventh lens has negative focal power, and the object side surface of the seventh lens is a concave surface; the number of the lenses is reasonable, the structure is simple, the imaging quality of the optical system is improved by reasonably distributing the focal power of the lenses and optimizing the aberration of the lens, the optical system has the advantages of low distortion, small size, large aperture 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, in particular to a low-distortion small-volume high-pixel optical system applied in the field of vehicle front view and a camera module applied by the optical system. BACKGROUND

[0002] With the rapid development of camera lenses in the field of vehicle front view, people have higher and higher requirements for the imaging quality of the lenses, not only small size and high definition, but also small distortion.

[0003] Many lenses on the market have unclear shooting pictures, large noise points and low recognition, which cannot meet the requirements of small distortion and high definition. If the lens has a large aperture and small size, and can realize high pixels, it will have great competitiveness in the market. CONTENT OF THE INVENTION

[0004] In order to overcome the shortcomings of unclear shooting pictures and low recognition of the existing vehicle front view lenses, the present application provides an optical system applied in the field of vehicle front view, which has the advantages of low distortion, small volume, large aperture and high pixels. At the same time, the configuration of large aperture can increase the light quantity of the optical system and the imaging quality.

[0005] A low-distortion small-volume high-pixel optical system, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence along the optical axis from the object plane to the image plane, wherein the first lens has negative focal power, and the image side surface thereof is concave;

[0006] The second lens has positive focal power, the object side surface thereof is convex, and the image side surface thereof is convex;

[0007] The third lens has focal power;

[0008] The fourth lens has focal power;

[0009] The fifth lens has positive focal power, and the image side surface thereof is convex;

[0010] The sixth lens has positive focal power, the object side surface thereof is convex, and the image side surface thereof is convex;

[0011] The seventh lens has negative focal power, and the object side surface thereof is concave.

[0012] Preferably, each lens of the optical system satisfies the following conditions:

[0013] -30.0mm < f1 < 0.0mm;

[0014] 5.0mm < f2 < 30.0mm;

[0015] -10.0 mm < f3 < 15.0 mm;

[0016] -10.0 mm < f4 < 15.0 mm;

[0017] -350.0 mm < f34 < -10.0 mm;

[0018] 10.0 mm < f5 < 30.0 mm;

[0019] 5.0 mm < f6 < 20.0 mm;

[0020] -20.0 mm < f7 < -5.0 mm;

[0021] 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, f34 is the combined focal length of the third and fourth lenses, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.

[0022] Preferably, the lenses of the optical system satisfy the following conditions:

[0023] -5.0 < f1 / f < 2.0;

[0024] 0.0 < f2 / f < 5.0;

[0025] -3.0 < f3 / f < 4.0;

[0026] -3.0 < f4 / f < 6.0;

[0027] -40.0 < f34 / f < 2.0;

[0028] 0.0 < f5 / f < 8.0;

[0029] 0.0 < f6 / f < 5.0;

[0030] -3.0 < f7 / f < 5.0;

[0031] 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, f34 is the combined focal length of the third and fourth lenses, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.

[0032] Preferably, the optical system satisfies the following condition: 1.60 < f / ENPD < 2.00;

[0033] wherein f is the effective focal length of the optical system and ENPD is the entrance pupil diameter.

[0034] Preferably, the optical system meets the following conditions: 0.80 <f / TTL*ImagH<3.00;

[0035] Where f is the effective focal length of the optical system, TTL is the on-axis distance from the object side of the first lens to the imaging plane, and ImagH is half the diagonal length of the effective pixel area on the imaging plane.

[0036] Preferably, the optical system satisfies the following conditions: the material refractive index Nd1 and the material Abbe constant Vd1 of the first lens satisfy: 1.69 <Nd1<2.00,25<Vd1<57。

[0037] Preferably, the optical system satisfies the following conditions: the material refractive index Nd2 and the material Abbe number Vd2 of the second lens satisfy: 1.50 <Nd2<2.00,17<Vd2<66。

[0038] Preferably, the optical system satisfies the following conditions: the material refractive index Nd3 and the material Abbe number Vd3 of the third lens satisfy: 1.43 <Nd3<1.62,63<Vd3<95。

[0039] Preferably, the optical system satisfies the following conditions: the material refractive index Nd4 and the material Abbe number Vd4 of the fourth lens satisfy: 1.50 <Nd4<2.00,17<Vd4<68。

[0040] Preferably, the optical system satisfies the following conditions: the refractive index Nd5 and the Abbe number Vd5 of the material of the fifth lens satisfy: 1.43 <Nd5<1.62,63<Vd5<95。

[0041] Preferably, the optical system satisfies the following conditions: the refractive index Nd6 and the Abbe number Vd6 of the sixth lens satisfy: 1.50 <Nd6<2.00,17<Vd6<68。

[0042] Preferably, the optical system satisfies the following conditions: the refractive index Nd7 and the Abbe number Vd7 of the seventh lens satisfy: 1.50 <Nd7<2.00,17<Vd7<68。

[0043] On the other hand, an embodiment of the present application further provides a camera module, comprising at least an optical lens, in which the above-mentioned low-distortion, small-volume, high-pixel optical system is installed.

[0044] Compared with the prior art, the present invention has the following advantages:

[0045] The utility model provides a kind of low-distortion small volume high-pixel optical system and the camera module of application thereof, it is mainly composed of 7 lenses, the first lens has negative optical power, its image side is concave;The second lens has positive optical power, its object side is convex, its image side is convex;The third lens has optical power;The fourth lens has optical power;The fifth lens has positive optical power, its image side is convex;The sixth lens has positive optical power, its object side is convex, its image side is convex;The seventh lens has negative optical power, its object side is concave;Reasonable number of lenses, simple structure, by reasonable distribution lens optical power, optimization lens aberration, promote the imaging quality of optical system, with the advantages of low-distortion, small volume, large aperture, high pixel, simultaneously, the configuration of large aperture can increase the light quantity of optical system and higher imaging quality. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows.

[0047] Figure 1 is the structural schematic diagram of optical system or camera module of the present application embodiment 1;

[0048] Figure 2 is astigmatism and distortion curve diagram of the present application embodiment 1 optical system or camera module;

[0049] Figure 3 is the MTF curve diagram of the present application embodiment 1 optical system or camera module;

[0050] Figure 4 is the structural schematic diagram of optical system or camera module of the present application embodiment 2;

[0051] Figure 5 is astigmatism and distortion curve diagram of the present application embodiment 2 optical system or camera module;

[0052] Figure 6 is the MTF curve diagram of the present application embodiment 2 optical system or camera module;

[0053] Figure 7 is the structural schematic diagram of optical system or camera module of the present application embodiment 3;

[0054] Figure 8 is astigmatism and distortion curve diagram of the present application embodiment 3 optical system or camera module;

[0055] Figure 9 is the MTF curve diagram of the present application embodiment 3 optical system or camera module;

[0056] Figure 10Schematic diagram of the structure of the optical system or camera module according to Example 4 of the present application;

[0057] Figure 11 4 is a graph showing astigmatism and distortion of the optical system or camera module according to Example 4 of the present application;

[0058] Figure 12 This is the MTF curve diagram of the optical system or camera module of Example 4 of the present application. DETAILED DESCRIPTION

[0059] like Figure 1-12 As shown, the present application provides a vehicle-mounted optical system, which is mainly composed of 7 lenses, including 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, and a filter E8 along the optical axis from the object plane to the image plane E9. The first lens has negative optical power, and its image side surface is concave; the second lens has positive optical power, its object side surface is convex, and its image side surface is convex; the third lens has optical power; the fourth lens has optical power; the fifth lens has positive optical power, and its image side surface is convex; the sixth lens has positive optical power, its object side surface is convex, and its image side surface is convex; the seventh lens has negative optical power, and its object side surface is concave; the number of lenses is reasonable and the structure is simple. By reasonably allocating the lens optical power, the lens aberration is optimized and the imaging quality of the optical system is improved. It has the advantages of low distortion, small size, large aperture, and high pixel. At the same time, the configuration of the large aperture can increase the amount of light entering the optical system and achieve higher imaging quality.

[0060] Furthermore, as a preferred embodiment of the present invention but not limiting, each lens of the optical system meets the following conditions: -30.0mm <f1<0.0mm;5.0mm<f2<30.0mm;-10.0mm<f3<15.0mm;-10.0mm<f4<15.0mm;-350.0mm<f34<-10.0mm;10.0mm<f5<30.0mm;5.0mm<f6<20.0mm;-20.0mm<f7<-5.0mm;其中,f1为第一透镜的焦距,f2为第二透镜的焦距,f3为第三透镜的焦距,f4为第四透镜的焦距,f34为第三透镜和第四透镜的组合焦距,f5为第五透镜的焦距,f6为第六透镜的焦距,f7为第七透镜的焦距。通过对光学系统各枚透镜有效焦距的合理控制,可以使光学系统具有低畸变、小体积、大光圈、高像素的优势,同时,大光圈的配置可增加光学系统的进光量以及更高的成像质量。

[0061] Furthermore, as a preferred embodiment of the present invention but not limiting, each lens of the optical system satisfies the following conditions: -5.0 <f1 / f<2.0;0.0<f2 / f<5.0;-3.0<f3 / f<4.0;-3.0<f4 / f<6.0;-40.0<f34 / f<2.0;0.0<f5 / f<8.0;0.0<f6 / f<5.0;-3.0<f7 / f<5.0;其中,f为整个光学系统的焦距,f1为第一透镜的焦距,f2为第二透镜的焦距,f3为第三透镜的焦距,f4为第四透镜的焦距,f34为第三透镜和第四透镜的组合焦距,f5为第五透镜的焦距,f6为第六透镜的焦距,f7为第七透镜的焦距。通过约束各透镜和光学系统焦距的比值在合理的范围,既保证了光学系统优良的像质,也保证了系统良好的加工性,改善系统像差,能够实现良好的成像品质。

[0062] Furthermore, as a preferred embodiment of the present invention but not limiting, the optical system satisfies the following conditions: 1.60 <f / ENPD<2.00;其中,f为光学系统的有效焦距,ENPD为入瞳直径。使光学镜头满足上述条件式,可以在满足高通光量的前提下,保证光学镜头的小口径,以实现光学镜头的小型化。

[0063] Furthermore, as a preferred embodiment of the present invention but not limiting, the optical system satisfies the following conditions: 0.80 <f / TTL*ImagH<3.00;其中,f为光学系统的有效焦距,TTL为第一透镜物侧面至成像面的轴上距离,ImagH为成像面上有效像素区域对角线长的一半。该关系式反映了光学镜头在视场角和轻薄特性上的约束情况,当满足上述关系式时,能够在满足光学镜头呈广角的基础上,满足市场对光学镜头对小头部和轻薄性的需求。当超过关系式上限,在保障光学镜头的视场角为广角的基础上,f / TTL*ImagH进一步缩小,会过度压缩光学镜头的轻薄性,不利于光学镜头的性能的提升。当低于关系式下限时,光学镜头的轻薄性不足,不利于光学镜头的小型化设计。

[0064] Furthermore, as a preferred embodiment of the present invention but not limiting, the optical system satisfies the following conditions: the material refractive index Nd1 and the material Abbe constant Vd1 of the first lens satisfy: 1.69 <Nd1<2.00,25<Vd1<57。第二透镜的材料折射率Nd2、材料阿贝数Vd2满足:1.50<Nd2<2.00,17<Vd2<66。第三透镜的材料折射率Nd3、材料阿贝数Vd3满足:1.43<Nd3<1.62,63<Vd3<95。第四透镜的材料折射率Nd4、材料阿贝数Vd4满足:1.50<Nd4<2.00,17<Vd4<68。第五透镜的材料折射率Nd5、材料阿贝数Vd5满足:1.43<Nd5<1.62,63<Vd5<95。第六透镜的材料折射率Nd6、材料阿贝数Vd6满足:1.50<Nd6<2.00,17<Vd6<68。第七透镜的材料折射率Nd7、材料阿贝数Vd7满足:1.50<Nd7<2.00,17<Vd7<68。通过限定各透镜的折射率与阿贝数之间的关系,有益于减小像差,提升了高像素光学系统的像质。 Specific embodiment:

[0066] Example 1

[0067] The following reference Figures 1 to 3 The optical imaging lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens according to Example 1 of the present application is shown.

[0068] like Figure 1 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, STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an imaging surface S17.

[0069] The first lens E1 has negative optical power, and its image-side surface S2 is concave. The second lens E2 has positive optical power, its object-side surface S3 is convex, and its image-side surface S4 is convex. The third lens E3 has optical power. The fourth lens E4 has optical power. The fifth lens E5 has positive optical power, and its image-side surface S10 is convex. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The seventh lens E7 has negative optical power, and its object-side surface S13 is concave. Light from an object passes through each surface S1 to S16 in sequence and is ultimately imaged on the imaging surface S17.

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

[0071] Table 1

[0072]

[0073] Figure 2 The astigmatism and distortion curves of the optical imaging lens of Example 1 are shown. Astigmatism represents meridional image curvature and sagittal image curvature; distortion represents the distortion magnitude corresponding to different image heights.

[0074] Figure 3 The MTF curve of the optical imaging lens of Example 1 is shown, which represents the MTF values ​​in the meridional and sagittal directions of different fields of view.

[0075] The optical imaging lens provided in Example 1 can achieve good imaging quality.

[0076] Example 2

[0077] The following reference Figures 4 to 6 The optical imaging lens according to Example 2 of the present application is described. Figure 4 A schematic structural diagram of an optical imaging lens according to Example 2 of the present application is shown.

[0078] 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, STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an imaging surface S17.

[0079] The first lens E1 has negative optical power, and its image-side surface S2 is concave. The second lens E2 has positive optical power, its object-side surface S3 is convex, and its image-side surface S4 is convex. The third lens E3 has optical power. The fourth lens E4 has optical power. The fifth lens E5 has positive optical power, and its image-side surface S10 is convex. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The seventh lens E7 has negative optical power, and its object-side surface S13 is concave. Light from an object passes through each surface S1 to S16 in sequence and is ultimately imaged on the imaging surface S17.

[0080] Table 2 shows the surface type, curvature radius, thickness, and material of each lens of the optical imaging lens of Example 2, where the units of curvature radius and thickness are both millimeters (mm).

[0081] Table 2

[0082]

[0083] Figure 5 The astigmatism and distortion curves of the optical imaging lens of Example 2 are shown. Astigmatism represents meridional image curvature and sagittal image curvature; distortion represents the distortion magnitude corresponding to different image heights.

[0084] Figure 6 The MTF curve of the optical imaging lens of Example 2 is shown, which represents the MTF values ​​in the meridional and sagittal directions of different fields of view.

[0085] The optical imaging lens provided in Example 2 can achieve good imaging quality.

[0086] Example 3:

[0087] The following reference Figures 7 to 9 The optical imaging lens according to Example 3 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Example 3 of the present application is shown.

[0088] like Figure 7 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, STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an imaging surface S17.

[0089] The first lens E1 has negative optical power, and its image-side surface S2 is concave. The second lens E2 has positive optical power, its object-side surface S3 is convex, and its image-side surface S4 is convex. The third lens E3 has optical power. The fourth lens E4 has optical power. The fifth lens E5 has positive optical power, and its image-side surface S10 is convex. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The seventh lens E7 has negative optical power, and its object-side surface S13 is concave. Light from an object passes through each surface S1 to S16 in sequence and is ultimately imaged on the imaging surface S17.

[0090] Table 3 shows the surface type, curvature radius, thickness, and material of each lens of the optical imaging lens system of Example 3, where the units of curvature radius and thickness are both millimeters (mm).

[0091] Table 3

[0092]

[0093] Figure 8 The astigmatism and distortion curves of the optical imaging lens of Example 3 are shown. Astigmatism represents meridional image curvature and sagittal image curvature; distortion represents the distortion magnitude corresponding to different image heights.

[0094] Figure 9 The MTF curve of the optical imaging lens of Example 3 is shown, which represents the MTF values ​​in the meridional and sagittal directions of different fields of view.

[0095] The optical imaging lens provided in Example 3 can achieve good imaging quality.

[0096] Example 4:

[0097] The following reference Figures 10 to 12 An optical imaging lens according to Example 4 of the present application is described. Figure 10 A schematic structural diagram of an optical imaging lens according to Example 4 of the present application is shown.

[0098] like Figure 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, STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an imaging surface S17.

[0099] The first lens E1 has negative optical power, and its image-side surface S2 is concave. The second lens E2 has positive optical power, its object-side surface S3 is convex, and its image-side surface S4 is convex. The third lens E3 has optical power. The fourth lens E4 has optical power. The fifth lens E5 has positive optical power, and its image-side surface S10 is convex. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The seventh lens E7 has negative optical power, and its object-side surface S13 is concave. Light from an object passes through each surface S1 to S16 in sequence and is ultimately imaged on the imaging surface S17.

[0100] Table 4 shows the surface type, curvature radius, thickness, and material of each lens of the optical imaging lens of Example 4, where the units of curvature radius and thickness are both millimeters (mm).

[0101] Table 4

[0102]

[0103] Figure 11 The astigmatism and distortion curves of the optical imaging lens of Example 4 are shown. Astigmatism represents meridional image curvature and sagittal image curvature; distortion represents the distortion magnitude corresponding to different image heights.

[0104] Figure 12 The MTF curve of the optical imaging lens of Example 4 is shown, which represents the MTF values ​​in the meridional and sagittal directions of different fields of view.

[0105] The optical imaging lens provided in Example 4 can achieve good imaging quality.

[0106] A camera module includes at least an optical lens, in which the above-mentioned vehicle-mounted optical system is installed. The optical system in the vehicle-mounted forward-view field of the present application has the advantages of low distortion, small size, large aperture and high pixel. At the same time, the configuration of the large aperture can increase the amount of light entering the optical system and higher imaging quality.

[0107] The above descriptions are provided in conjunction with specific content to provide one or more implementation methods, and do not limit the specific implementation of the present invention to these descriptions. Any similarity or similarity with the methods, structures, etc. of the present invention, or any technical deduction or substitution based on the concept of the present invention, shall be deemed to be within the scope of protection of the present invention.

Claims

1. A low-distortion, small-volume, high-pixel optical system comprising, 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, and a seventh lens, characterized in that: The first lens has a negative optical power, and its image side is concave; The second lens has a positive optical power, its object side is convex, and its image side is convex; The third lens has an optical power; The fourth lens has an optical power; The fifth lens has a positive optical power, and its image side is convex; The sixth lens has a positive optical power, its object side is convex, and its image side is convex; The seventh lens has a negative optical power, and its object side is concave.

2. The low-distortion, small-volume, high-pixel optical system according to claim 1, wherein: Each lens of this optical system satisfies the following conditions: -30.0mm < f1 < 0.0mm; 5.0mm < f2 < 30.0mm; -10.0mm < f3 < 15.0mm; -10.0mm < f4 < 15.0mm; -350.0mm < f34 < -10.0mm; 10.0mm < f5 < 30.0mm; 5.0mm < f6 < 20.0mm; -20.0mm < f7 < -5.0mm; 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, f34 is the combined focal length of the third lens and the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.

3. The low-distortion, small-volume, high-pixel optical system according to claim 1, wherein: Each lens of this optical system satisfies the following conditions: -5.0 < f1 / f < 2.0; 0.0 < f2 / f < 5.0; -3.0 < f3 / f < 4.0; -3.0 < f4 / f < 6.0; -40.0 < f34 / f < 2.0; 0.0 < f5 / f < 8.0; 0,0 < f6 / f < 5.0; -3.0 < f7 / f < 5.0; 4. The low-distortion, small-volume, high-pixel optical system according to any one of claims 1 to 3, wherein: 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, f34 is the combined focal length of the third lens and the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens. This optical system satisfies the following condition: 1.60 < f / ENPD < 2.00; 5. The low-distortion, small-volume, high-pixel optical system according to any one of claims 1 to 3, wherein: Where, f is the effective focal length of the optical system, and ENPD is the entrance pupil diameter. This optical system satisfies the following condition: 0.80 < f / TTL*ImagH < 3.00; 6. The low-distortion, small-volume, high-pixel optical system according to any one of claims 1 to 3, characterized in that: Where, f is the effective focal length of the optical system, TTL is the axial distance from the object side of the first lens to the imaging plane, and ImagH is half of the diagonal length of the effective pixel area on the imaging plane. This optical system satisfies 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; and / or 7. The low-distortion, small-volume, high-pixel optical system according to any one of claims 1 to 3, characterized in that: The refractive index Nd2 and Abbe number Vd2 of the material of the second lens satisfy: 1.50 < Nd2 < 2.00, 17 < Vd2 < 66. This optical system satisfies the following conditions: The refractive index Nd3 and Abbe number Vd3 of the material of the third lens satisfy: 1.43 < Nd3 < 1.62, 63 < Vd3 < 95; and / or The refractive index Nd4 and Abbe number Vd4 of the material of the fourth lens satisfy: 1.50 < Nd4 < 2.00, 17 < Vd4 < 68.

8. The low-distortion, small-volume, high-pixel optical system according to any one of claims 1 to 3, characterized in that: The optical system satisfies the following conditions: The refractive index Nd5 and Abbe number Vd5 of the material of the fifth lens satisfy: 1.43 < Nd5 < 1.62, 63 < Vd5 < 95; and / or The refractive index Nd6 and Abbe number Vd6 of the material of the sixth lens satisfy: 1.50 < Nd6 < 2.00, 17 < Vd6 < 68.

9. The low-distortion, small-volume, high-pixel optical system according to any one of claims 1 to 3, characterized in that: The optical system satisfies the following conditions: The refractive index Nd7 and Abbe number Vd7 of the material of the seventh lens satisfy: 1.50 < Nd7 < 2.00, 17 < Vd7 < 68.

10. A camera module, comprising at least an optical lens, characterized in that: The low-distortion, small-volume, high-pixel optical system according to any one of claims 1-9 is installed in the optical lens.

Images