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

Abstract

The invention provides a low-distortion, small-size and high-pixel optical system and a camera module applying the same, the low-distortion, small-size and 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, and in particular to a low-distortion, small-volume, high-pixel optical system used in the field of vehicle-mounted front-view imaging, and a camera module used therein. Background Art

[0002] With the rapid development of camera lenses in the field of automotive front-view cameras, people have higher and higher requirements on the imaging quality of lenses, requiring not only miniaturization and high clarity, but also smaller distortion.

[0003] Currently, many lenses on the market produce unclear images, high noise, and low recognition, which cannot meet the requirements of small distortion and high definition. If the lens has a larger aperture and a smaller size, while achieving high pixels, it will be more competitive in the market. Summary of the invention

[0004] In order to overcome the shortcomings of existing vehicle-mounted front-view lenses, such as unclear shooting pictures and low recognition, the present invention provides an optical system applied to the field of vehicle-mounted front-view, which has the advantages of low distortion, small size, large aperture 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.

[0005] A low-distortion, small-volume, high-pixel optical system, which is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in sequence from the object plane to the image plane along the optical axis, wherein the first lens has a negative optical power, and its image side surface is a concave surface; The second lens has positive refractive 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 refractive power, and its image side surface is convex; The sixth lens has positive refractive power, its object side surface is convex, and its image side surface is convex; The seventh lens element has negative optical power, and its object side surface is concave.

[0006] Preferably, each lens of the 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; 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, 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.

[0007] Preferably, 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; 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, 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.

[0008] Preferably, the optical system meets the following conditions: 1.60 <f / ENPD<2.00; Where f is the effective focal length of the optical system and ENPD is the entrance pupil diameter.

[0009] Preferably, the optical system meets the following conditions: 0.80 <f / TTL*ImagH<3.00; 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.

[0010] 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。

[0011] 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。

[0012] 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。

[0013] 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。

[0014] Preferably, the optical system satisfies the following conditions: the material refractive index Nd5 and the material Abbe number Vd5 of the fifth lens satisfy: 1.43 <Nd5<1.62,63<Vd5<95。 Preferably, the optical system satisfies the following conditions: the material refractive index Nd6 and the material Abbe number Vd6 of the sixth lens satisfy: 1.50 <Nd6<2.00,17<Vd6<68。

[0015] Preferably, the optical system satisfies the following conditions: the material refractive index Nd7 and the material Abbe number Vd7 of the seventh lens satisfy: 1.50 <Nd7<2.00,17<Vd7<68。

[0016] 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.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a low-distortion, small-volume, high-pixel optical system and a camera module applied thereto, which are mainly composed of 7 lenses, wherein the first lens has negative optical power, and its image side surface is a concave surface; the second lens has positive optical power, and its object side surface is a convex surface, and its image side surface is a convex surface; 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 a convex surface; the sixth lens has positive optical power, and its object side surface is a convex surface, and its image side surface is a convex surface; the seventh lens has negative optical power, and its object side surface is a concave surface; the number of lenses is reasonable, the structure is simple, and the optical power of the lenses is reasonably distributed, the lens aberration is optimized, and the imaging quality of the optical system is improved, and the system has the advantages of low distortion, small volume, 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 provide higher imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 It is a structural schematic diagram of the optical system or camera module of Example 1 of the present application; Figure 2 is an astigmatism and distortion curve diagram of the optical system or camera module of Example 1 of the present application; Figure 3 is an MTF curve diagram of the optical system or camera module of Example 1 of the present application; Figure 4 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 2 of the present application; Figure 5 is an astigmatism and distortion curve diagram of the optical system or camera module of Example 2 of the present application; Figure 6 is an MTF curve diagram of the optical system or camera module of Example 2 of the present application; Figure 7 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 3 of the present application; Figure 8 is an astigmatism and distortion curve diagram of the optical system or camera module of Example 3 of the present application; Fig. 9 is an MTF curve diagram of the optical system or camera module of Example 3 of the present application; Fig.10 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 4 of the present application; Fig.11 is an astigmatism and distortion curve diagram of the optical system or camera module of Example 4 of the present application; Fig.12 It is an MTF curve diagram of the optical system or camera module of Example 4 of the present application. DETAILED DESCRIPTION

[0020] like Figure 1-12 As shown, the present application provides a vehicle-mounted optical system, which is mainly composed of 7 lenses, and 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, and a filter E8 in sequence from the object plane to the image plane E9 along the optical axis. 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, the structure is simple, and the lens optical power is reasonably distributed, 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 higher imaging quality.

[0021] Further, as a preferred embodiment of the present invention rather than a limitation, each lens of the 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 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. By reasonably controlling the effective focal lengths of each lens of the optical system, the optical system can have the advantages of low distortion, small volume, large aperture, and high pixels. At the same time, the configuration of the large aperture can increase the light input of the optical system and higher imaging quality.

[0022] Further, as a preferred embodiment of the present invention rather than a limitation, 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; 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 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.. By constraining 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, the system aberration is improved, and good imaging quality can be achieved.

[0023] Further, as a preferred embodiment of the present invention rather than a limitation, the optical system satisfies the following condition: 1.60 < f / ENPD < 2.00; where f is the effective focal length of the optical system and ENPD is the entrance pupil diameter. By making the optical lens satisfy the above conditional formula, the small aperture of the optical lens can be ensured on the premise of satisfying high light throughput, so as to realize the miniaturization of the optical lens.

[0024] Further, as a preferred embodiment rather than a limitation of the present invention, the optical system satisfies the following conditions: 0.80 < f / TTL * ImagH < 3.00; where f is the effective focal length of the optical system, TTL is the on-axis distance from the object side surface of the first lens to the imaging surface, and ImagH is half of the diagonal length of the effective pixel region on the imaging surface. This relational expression reflects the constraint situation of the optical lens in terms of the field of view angle and the thin and light characteristics. When the above relational expression is satisfied, it is possible to meet the market demand for the small head and thin and light characteristics of the optical lens on the basis of ensuring that the optical lens has a wide angle of view. When exceeding the upper limit of the relational expression, on the basis of ensuring that the field of view angle of the optical lens is wide, f / TTL * ImagH is further reduced, which will excessively compress the thin and light characteristics of the optical lens and is not conducive to the improvement of the performance of the optical lens. When lower than the lower limit of the relational expression, the thin and light characteristics of the optical lens are insufficient, which is not conducive to the miniaturized design of the optical lens.

[0025] Further, as a preferred embodiment rather than a limitation of the present invention, the 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. The refractive index Nd2 and Abbe number Vd2 of the material of the second lens satisfy: 1.50 < Nd2 < 2.00, 17 < Vd2 < 66. The refractive index Nd3 and Abbe number Vd3 of the material of the third lens satisfy: 1.43 < Nd3 < 1.62, 63 < Vd3 < 95. 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: 1.43 < Nd5 < 1.62, 63 < Vd5 < 95. The refractive index Nd6 and Abbe number Vd6 of the material of the sixth lens satisfy: 1.50 < Nd6 < 2.00, 17 < Vd6 < 68. The refractive index Nd7 and Abbe number Vd7 of the material of the seventh lens satisfy: 1.50 < Nd7 < 2.00, 17 < Vd7 < 68. 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. Specific embodiments: Embodiment 1 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.

[0027] 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, 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.

[0028] The first lens E1 has negative power, and its image side surface S2 is concave. The second lens E2 has positive 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 power, and its image side surface S10 is convex. The sixth lens E6 has positive power, its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative power, and its object side surface S13 is concave. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0029] 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).

[0030] Table 1

[0031] 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.

[0032] 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.

[0033] The optical imaging lens provided in Example 1 can achieve good imaging quality.

[0034] Embodiment 2 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.

[0035] 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.

[0036] The first lens E1 has negative power, and its image side surface S2 is concave. The second lens E2 has positive 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 power, and its image side surface S10 is convex. The sixth lens E6 has positive power, its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative power, and its object side surface S13 is concave. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0037] Table 2 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).

[0038] Table 2

[0039] 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.

[0040] 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.

[0041] The optical imaging lens provided in Example 2 can achieve good imaging quality.

[0042] Embodiment 3 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.

[0043] 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.

[0044] The first lens E1 has negative power, and its image side surface S2 is concave. The second lens E2 has positive 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 power, and its image side surface S10 is convex. The sixth lens E6 has positive power, its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative power, and its object side surface S13 is concave. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0045] Table 3 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).

[0046] Table 3

[0047] 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.

[0048] 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.

[0049] The optical imaging lens provided in Example 3 can achieve good imaging quality.

[0050] Embodiment 4: 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.

[0051] 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, 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.

[0052] The first lens E1 has negative power, and its image side surface S2 is concave. The second lens E2 has positive 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 power, and its image side surface S10 is convex. The sixth lens E6 has positive power, its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative power, and its object side surface S13 is concave. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0053] Table 4 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).

[0054] Table 4

[0055] 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.

[0056] 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.

[0057] The optical imaging lens provided in Example 4 can achieve good imaging quality.

[0058] 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 achieve higher imaging quality.

[0059] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of the present invention is not limited to these descriptions. Any similarity or similarity with the method, structure, etc. of the present invention, or any technical deduction or replacement based on the concept of the present invention, shall be regarded as the protection scope of the present invention.

Claims

1. A low-distortion, small-volume, high-pixel optical system, which is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in sequence from the object plane to the image plane along the optical axis, 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 fourth lens and the fifth lens form a cemented lens; 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; This optical system satisfies the following condition: 1.60 < f / ENPD < 2.00; Wherein, f is the effective focal length of the optical system, and ENPD is the entrance pupil diameter.

2. The low-distortion, small-volume, high-pixel optical system according to claim 1, characterized in that: 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; 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 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, characterized in that: 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; 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 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.

4. The low-distortion, small-volume, high-pixel optical system according to any one of claims 1 to 3, characterized in that: This optical system satisfies the following condition: 0.80 < f / TTL*ImagH < 3.00; Wherein, 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 surface, and ImagH is half of the diagonal length of the effective pixel region on the imaging surface.

5. The low-distortion, small-volume, high-pixel optical system according to any one of claims 1 to 3, characterized in that: 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 The refractive index Nd2 and Abbe number Vd2 of the material of the second lens satisfy: 1.50 < Nd2 < 2.00, 17 < Vd2 < 66.

6. The low-distortion, small-volume, high-pixel optical system according to any one of claims 1 to 3, characterized in that: 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.

7. 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 Nd4 and the Abbe number Vd4 of the material of the fourth lens satisfy: 1.50 < Nd4 < 2.00, 17 < Vd4 < 68; and / or 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.

8. The low-distortion, small-volume, high-pixel optical system according to any one of claims 1 to 3, characterized in that: The refractive index Nd6 and the 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 the 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.

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