High-pixel large-aperture vehicle-mounted optical imaging system and camera module applied by same

Abstract

The utility model provides a high-pixel large-aperture vehicle-mounted optical imaging system and an applied camera module thereof, which are mainly composed of seven lenses, through reasonable matching of lens shapes and focal power, the high-pixel design requirement of the optical system is effectively met, the sensitivity of components is effectively reduced, and the high-pixel large-aperture vehicle-mounted optical imaging system has the advantages of high pixel, large wide angle and small total length, and is compact in structure and convenient to use. And meanwhile, due to the configuration of the large aperture, the light inlet amount of the optical system can be increased, and the higher imaging quality can be achieved.

Description

Technical Field

[0001] The present application relates to the field of optical imaging, and in particular to a high-pixel, large-aperture vehicle-mounted optical imaging system and a camera module used therein. Background Art

[0002] With the advancement of science and the development of artificial intelligence, people's demand for optical imaging systems in the automotive field is growing. Since intelligent assisted driving is closely related to vehicle driving safety, and intelligent assisted driving lenses are an important tool for drivers to ensure driving safety. Therefore, it is particularly important to design and produce intelligent assisted driving lenses with high performance and stable imaging quality. Intelligent assisted driving lenses have been widely used. The existing intelligent assisted driving lenses on the market have low pixels, high costs, and large structural sizes, which can hardly meet people's needs. Therefore, high-quality and low-cost intelligent assisted driving lenses have a large number of broad application prospects and a large number of field of view requirements. In addition, an intelligent assisted driving optical imaging system with no heat, stable imaging quality, and no ghost images has become a goal pursued by people. Utility Model Content

[0003] In order to achieve the goals of high pixels, miniaturization and wide angle, the imaging system provided by the present application has the advantages of high pixels, wide angle and small overall length. At the same time, the configuration of large aperture can increase the amount of light entering the optical system and higher imaging quality.

[0004] A high-pixel and large-aperture vehicle-mounted optical imaging system, which includes 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 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, its object side surface is concave, and its image 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 optical power, and its object side surface is convex;

[0010] The sixth lens has optical power;

[0011] The seventh lens has negative refractive power.

[0012] Preferably, the optical imaging system satisfies the following relationship:

[0013] 0.9 <f*tan(DFOV) / DT1<1.1;

[0014] 1.1 <f*tan(DFOV) / DT2<1.6;

[0015] 1.1 <f*tan(DFOV) / DT3<1.6;

[0016] 1.1 <f*tan(DFOV) / DT4<1.5;

[0017] 1.3 <f*tan(DFOV) / DT5<1.6;

[0018] 1.1 <f*tan(DFOV) / DT6<1.6;

[0019] 1.1 <f*tan(DFOV) / DT7<1.5;

[0020] Wherein, f is the effective focal length of the optical imaging system, DFOV is half of the maximum field of view of the optical imaging system, DT1 is the maximum effective radius of the first lens, DT2 is the maximum effective radius of the second lens, DT3 is the maximum effective radius of the third lens, DT4 is the maximum effective radius of the fourth lens, DT5 is the maximum effective radius of the fifth lens, DT6 is the maximum effective radius of the sixth lens, and DT7 is the maximum effective radius of the seventh lens.

[0021] Preferably, the optical imaging system satisfies the following relationship: <fi(i=1,2,3,4,5,6) / f<4;

[0022] Among them, fi (i=1,2,3,4,5,6) are the effective focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens respectively, and f is the effective focal length of the optical imaging system.

[0023] Preferably, the optical imaging system satisfies the following relationship:

[0024] 1.7 <R11 / R12<2.9;

[0025] -1.4 <R21 / R22<-0.2;

[0026] -2.0 <R31 / R32<-0.5;

[0027] -0.4 <R41 / R42<0.4;

[0028] 1<|R51 / R52|<4.5;

[0029] 1.1 <R71 / R72<9.6;

[0030] Among them, R11 is the object side curvature radius of the first lens, R12 is the image side curvature radius of the first lens; R21 is the object side curvature radius of the second lens, R22 is the image side curvature radius of the second lens; R31 is the object side curvature radius of the third lens, R32 is the image side curvature radius of the third lens; R41 is the object side curvature radius of the fourth lens, R42 is the image side curvature radius of the fourth lens; R51 is the object side curvature radius of the fifth lens, R52 is the image side curvature radius of the fifth lens; R71 is the object side curvature radius of the seventh lens, R72 is the image side curvature radius of the seventh lens.

[0031] Preferably, the optical imaging system satisfies the following relationship:

[0032] 0<|f4 / f7|<1;

[0033] 0<|f1 / f23|<1;

[0034] 0.4<|f1 / f56|<1.2;

[0035] Among them, f1 is the effective focal length of the first lens, f4 is the effective focal length of the fourth lens, f7 is the effective focal length of the seventh lens, f23 is the effective combined focal length of the second lens and the third lens, and f56 is the effective combined focal length of the fifth lens and the sixth lens.

[0036] Preferably, the optical imaging system satisfies the following relationship:

[0037] 15 <vd4 / nd4<55;

[0038] 10 <vd7 / nd7<55;

[0039] 1.49 <nd5<1.85;

[0040] 1.49 <nd6<1.85;

[0041] Among them, nd4 is the refractive index of the fourth lens, vd4 is the Abbe number of the fourth lens; nd7 is the refractive index of the seventh lens, vd7 is the Abbe number of the seventh lens, nd5 is the refractive index of the fifth lens, and nd6 is the refractive index of the sixth lens.

[0042] Preferably, the optical imaging system satisfies the following relationship: 0.5 <f / BFL<3.0;

[0043] 0.2 <CT1 / ET1<1.5;

[0044] Wherein, f is the effective focal length of the first lens, BFL is the distance from the image side of the seventh lens to the imaging plane on the optical axis, CT1 is the center thickness of the first lens, and ET1 is the edge thickness of the first lens.

[0045] Preferably, the optical imaging system satisfies the following relationship: 0.1 < TTL / DFOV < 1.0, TTL is the total length of the optical imaging system, and DFOV is half of the maximum field of view of the optical imaging system.

[0046] Preferably, the first lens, the second lens, the third lens, the fifth lens and the sixth lens are spherical lenses, and the fourth lens and the seventh lens are aspherical lenses.

[0047] 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 high-pixel and large-aperture vehicle-mounted optical imaging system is installed.

[0048] Compared with the prior art, the beneficial effects of this application are as follows:

[0049] The utility model provides a high-pixel and large-aperture vehicle-mounted optical imaging system and a camera module used therein, which is mainly composed of 7 lenses. Through the reasonable combination of lens shape and optical focal length, the high-pixel design requirements of the optical system are effectively met, and the sensitivity of components is effectively reduced. It has the advantages of high pixels, wide angle and short overall length, compact structure, and is easy to process and install. 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] 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.

[0051] Figure 1 It is a structural schematic diagram of the optical system or camera module of Example 1 of the present application;

[0052] Figure 2 is the astigmatism and distortion curve of the optical system or camera module of Example 1 of the present application;

[0053] Figure 3 is the MTF curve of the optical system or camera module of Example 1 of the present application;

[0054] Figure 4 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 2 of the present application;

[0055] Figure 5 is the astigmatism and distortion curve of the optical system or camera module of Example 2 of the present application;

[0056] Figure 6 is the MTF curve of the optical system or camera module of Example 2 of the present application;

[0057] Figure 7 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 3 of the present application;

[0058] Figure 8 is the astigmatism and distortion curve of the optical system or camera module of Example 3 of the present application;

[0059] Fig. 9 It is the MTF curve of the optical system or camera module of Example 3 of the present application. DETAILED DESCRIPTION

[0060] like Figure 1-9 As shown, the present application provides a high-pixel and large-aperture vehicle-mounted optical imaging 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, and a seventh lens E7 in sequence from the object plane to the image plane along the optical axis. The first lens, the second lens, the third lens, the fifth lens, and the sixth lens are spherical lenses, and the fourth lens and the seventh lens are aspherical lenses. 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, and its image 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 optical power, and its object side surface is convex; the sixth lens has optical power; and the seventh lens has negative optical power.

[0061] The optical system of the embodiment of the present application is mainly composed of 7 lenses. Through the reasonable combination of lens shape and optical focal length, it effectively meets the high-pixel design requirements of the optical system and effectively reduces the sensitivity of components. It has the advantages of high pixels, wide angles and short overall length, compact structure, and is easy to process and install. At the same time, the configuration of a large aperture can increase the amount of light entering the optical system and achieve higher imaging quality.

[0062] Furthermore, the optical imaging system satisfies the following conditions: 0.1 < TTL / DFOV < 1.0, where DFOV is the field of view of the optical imaging system, and TTL is the distance from the object side surface of the first lens of the optical imaging system to the imaging surface. By reasonably balancing the field of view of the optical imaging system, the imaging of the intelligent assisted driving optical system is achieved within a suitable range, which can effectively compress the size of the system and realize the miniaturization of the high-pixel optical system.

[0063] Furthermore, the optical imaging system satisfies the following conditions: 0.9 < f * tan(DFOV) / DT1 < 1.1; 1.1 < f * tan(DFOV) / DT2 < 1.6; 1.1 < f * tan(DFOV) / DT3 < 1.6; 1.1 < f * tan(DFOV) / DT4 < 1.5; 1.3 < f * tan(DFOV) / DT5 < 1.6; 1.1 < f * tan(DFOV) / DT6 < 1.6; 1.1 < f * tan(DFOV) / DT7 < 1.5; where f is the effective focal length of the optical imaging system, DFOV is half of the maximum field of view angle of the optical imaging system, DT1 is the maximum effective radius of the first lens, DT2 is the maximum effective radius of the second lens, DT3 is the maximum effective radius of the third lens, DT4 is the maximum effective radius of the fourth lens, DT5 is the maximum effective radius of the fifth lens, DT6 is the maximum effective radius of the sixth lens, and DT7 is the maximum effective radius of the seventh lens. By controlling the relationship between the focal length, field of view angle, and aperture between each lens, the requirement of small distortion is achieved, while the effective diameter of each component is restricted, and the size of the overall optical system is controlled, which is beneficial to correcting the coma of the system.

[0064] Furthermore, the optical imaging system satisfies the following conditions: -4 < fi (i = 1, 2, 3, 4, 5, 6) / f < 4; where fi (i = 1, 2, 3, 4, 5, 6) are the effective focal lengths of the first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens respectively, and f is the effective focal length of the optical imaging system. The limitation of the ratio of the effective focal length of each lens to the effective focal length of the optical system enables the optical system to obtain a reasonable light deflection angle, effectively reduces the sensitivity of component tolerances, and improves the system aberration.

[0065] Furthermore, the optical imaging system satisfies the following conditions: 1.7 < R11 / R12 < 2.9; -1.4 < R21 / R22 < -0.2; -2.0 < R31 / R32 < -0.5; -0.4 < R41 / R42 < 0.4; 1 < |R51 / R52| < 4.5; 1.1 < R71 / R72 < 9.6; where, R11 is the curvature radius of the object side surface of the first lens, R12 is the curvature radius of the image side surface of the first lens; R21 is the curvature radius of the object side surface of the second lens, R22 is the curvature radius of the image side surface of the second lens; R31 is the curvature radius of the object side surface of the third lens, R32 is the curvature radius of the image side surface of the third lens; R41 is the curvature radius of the object side surface of the fourth lens, R42 is the curvature radius of the image side surface of the fourth lens; R51 is the curvature radius of the object side surface of the fifth lens, R52 is the curvature radius of the image side surface of the fifth lens; R71 is the curvature radius of the object side surface of the seventh lens, R72 is the curvature radius of the image side surface of the seventh lens; by controlling the relationship of the curvature radii between various components, the ghost images formed by reflections between lenses are effectively suppressed, and the incident angles of the chief rays of each field of view of the optical imaging lens on the image plane are relatively reasonably controlled, meeting the requirements of the incident angle of the chief ray in the optical system design, and the sensitivity of the system can be effectively reduced.

[0066] Furthermore, the optical imaging system satisfies the following conditions: 0 < |f4 / f7| < 1; 0 < |f1 / f23| < 1; 0.4 < |f1 / f56| < 1.2; where, f1 is the effective focal length of the first lens, f4 is the effective focal length of the fourth lens, f7 is the effective focal length of the seventh lens, f23 is the effective combined focal length of the second lens and the third lens, f56 is the effective combined focal length of the fifth lens and the sixth lens. By constraining the ratios of the effective focal lengths of the fourth lens and the seventh lens, the ratio of the combined focal length of the first lens and the second lens and the third lens, and the ratio of the combined focal length of the first lens and the fifth lens and the sixth lens within a reasonable range, both the excellent image quality of the optical system and the good processability of the system are ensured.

[0067] Furthermore, the optical imaging system satisfies the following conditions: 0.5 < f / BFL < 3; where, f is the effective focal length of the optical imaging system, BFL is the distance from the image side surface of the seventh lens to the imaging plane on the optical axis. By controlling the relationship between the effective focal length of the optical imaging system and the distance from the image side surface of the seventh lens to the imaging plane on the optical axis, it is beneficial to the assembly of the optical imaging system, and at the same time, it is also beneficial to reducing the ghost images generated between the optical imaging system and the electronic components.

[0068] Furthermore, the optical imaging system satisfies the following conditions: 15 < vd4 / nd4 < 55; 10 < vd7 / nd7 < 55; where nd4 is the refractive index of the fourth lens, vd4 is the Abbe number of the fourth lens; nd7 is the refractive index of the seventh lens, and vd7 is the Abbe number of the seventh lens. By defining the relationship between the refractive index and the Abbe number of the fourth lens and the seventh lens, it is beneficial to reduce aberration and improve the image quality of the high-pixel optical system.

[0069] Furthermore, the optical imaging system satisfies the following conditions: 0.2 < CT1 / ET1 < 1.5; where CT1 is the central thickness of the first lens and ET1 is the edge thickness of the first lens. By defining the relationship between the central thickness and the edge thickness of the first lens, it not only meets the application requirements of the high-pixel optical imaging system in the in-vehicle and out-of-vehicle spaces but also ensures good processability of the component.

[0070] Furthermore, the optical imaging system satisfies the following conditions: 1.49 < nd5 < 1.85; 1.49 < nd6 < 1.85. Where nd5 is the refractive index of the fifth lens and nd6 is the refractive index of the sixth lens. By controlling the fifth lens and the sixth lens, it is beneficial to balance the spherical aberration generated by the first four lenses, and thus effectively control the spherical aberration of the system.

[0071] Example 1

[0072] The following refers to Figures 1 to 3 Describe the optical imaging lens according to Embodiment 1 of the present application. Figure 1 The structural schematic diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0073] As Figure 1 shown, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a diaphragm STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an infrared filter E8, and an imaging surface S15.

[0074] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S4 is convex, and its image side surface S5 is convex. The fourth lens E4 has positive power, and its object side surface S6 is convex, and its image side surface S7 is convex. The fifth lens E5 has positive power, and its object side surface S8 is convex, and its image side surface S9 is concave. The sixth lens E6 has negative power, and its object side surface S9 is convex, and its image side surface S10 is convex. The seventh lens E7 has negative power, and its object side surface S11 is concave, and its image side surface S12 is convex. The filter E8 has an object side surface S13 and an image side surface S14. The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0075] 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).

[0076] Table 1

[0077]

[0078] In Table 1, the object side surface and the image side surface of any one of the second lens E2 and the seventh lens E7 are both aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0079]

[0080] 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 2 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 Example 1.

[0081] Table 2

[0082]

[0083] 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. 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 at different spatial frequencies. The optical imaging lens provided in Example 1 can achieve good imaging quality.

[0084] Embodiment 2

[0085] 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.

[0086] 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, an aperture STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an infrared filter E8 and an imaging surface S15.

[0087] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S4 is convex, and its image side surface S5 is convex. The fourth lens E4 has positive power, and its object side surface S6 is convex, and its image side surface S7 is convex. The fifth lens E5 has positive power, and its object side surface S8 is convex, and its image side surface S9 is convex. The sixth lens E6 has negative power, and its object side surface S9 is concave, and its image side surface S10 is a plane. The seventh lens E7 has negative power, and its object side surface S11 is concave, and its image side surface S12 is convex. The filter E8 has an object side surface S13 and an image side surface S14. The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0088] 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).

[0089] Table 3

[0090]

[0091] In Table 3, the object side surface and the image side surface of any lens of the second lens E2 to the sixth lens E6 are aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0092]

[0093] 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 and A14 of each aspherical surface that can be used in Example 2.

[0094] Table 4

[0095]

[0096] 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. 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 at different spatial frequencies. The optical imaging lens provided in Example 2 can achieve good imaging quality.

[0097] Embodiment 3

[0098] 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.

[0099] 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, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an infrared filter E8 and an imaging surface S15.

[0100] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S4 is convex, and its image side surface S5 is convex. The fourth lens E4 has positive power, and its object side surface S6 is convex, and its image side surface S7 is concave. The fifth lens E5 has negative power, and its object side surface S8 is convex, and its image side surface S9 is concave. The sixth lens E6 has positive power, and its object side surface S9 is convex, and its image side surface S10 is convex. The seventh lens E7 has negative power, and its object side surface S11 is concave, and its image side surface S12 is convex. The filter E8 has an object side surface S13 and an image side surface S14. The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0101] 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).

[0102] Table 5

[0103]

[0104] In Table 5, any object side surface and image side surface of the second lens E2 to the sixth lens E6 are aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0105]

[0106] 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 Example 3.

[0107] Table 6

[0108]

[0109] 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. 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 at different spatial frequencies. The optical imaging lens provided in Example 3 can achieve good imaging quality.

[0110] A camera module includes at least an optical lens, in which the above-mentioned vehicle-mounted optical system is installed. It has the advantages of high pixels, wide angle and short overall length, compact structure, and is easy to process and install. At the same time, the configuration of a large aperture can increase the amount of light entering the optical system and achieve higher imaging quality.

[0111] 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. A high-pixel and large-aperture vehicle-mounted optical imaging system, comprising 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 negative optical power, its object side surface is convex, and its image side surface is concave; The second lens has negative optical power, its object side surface is concave, and its image 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 optical power, and its object side surface is convex; The sixth lens has optical power; The seventh lens has negative refractive power.

2. The high-pixel and large-aperture vehicle-mounted optical imaging system according to claim 1, characterized in that: The optical imaging system satisfies the following relationship: 0.9 < f*tan(DFOV) / DT1 < 1.1; 1.1 < f*tan(DFOV) / DT2 < 1.6; 1.1 < f*tan(DFOV) / DT3 < 1.6; 1.1 < f*tan(DFOV) / DT4 < 1.5; 1.3 < f*tan(DFOV) / DT5 < 1.6; 1.1 < f*tan(DFOV) / DT6 < 1.6; 1.1 < f*tan(DFOV) / DT7 < 1.5; Wherein, f is the effective focal length of the optical imaging system, DFOV is half of the maximum field of view of the optical imaging system, DT1 is the maximum effective radius of the first lens, DT2 is the maximum effective radius of the second lens, DT3 is the maximum effective radius of the third lens, DT4 is the maximum effective radius of the fourth lens, DT5 is the maximum effective radius of the fifth lens, DT6 is the maximum effective radius of the sixth lens, and DT7 is the maximum effective radius of the seventh lens.

3. The high-pixel and large-aperture vehicle-mounted optical imaging system according to claim 1, characterized in that: The optical imaging system satisfies the following relationship: -4< fi(i=1,2,3,4,5,6) / f <4; Among them, fi (i=1,2,3,4,5,6) are the effective focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens respectively, and f is the effective focal length of the optical imaging system.

4. The high-pixel and large-aperture vehicle-mounted optical imaging system according to any one of claims 1 to 3, characterized in that: The optical imaging system satisfies the following relationship: 1.7 < R11 / R12 < 2.9; -1.4 < R21 / R22 < -0.2; -2.0 < R31 / R32 < -0.5; -0.4 < R41 / R42 < 0.4; 1 <|R51 / R52| < 4.5; 1.1< R71 / R72 < 9.6; Among them, R11 is the object side curvature radius of the first lens, R12 is the image side curvature radius of the first lens; R21 is the object side curvature radius of the second lens, R22 is the image side curvature radius of the second lens; R31 is the object side curvature radius of the third lens, R32 is the image side curvature radius of the third lens; R41 is the object side curvature radius of the fourth lens, R42 is the image side curvature radius of the fourth lens; R51 is the object side curvature radius of the fifth lens, R52 is the image side curvature radius of the fifth lens; R71 is the object side curvature radius of the seventh lens, R72 is the image side curvature radius of the seventh lens.

5. The high-pixel and large-aperture vehicle-mounted optical imaging system according to any one of claims 1 to 3, characterized in that: The optical imaging system satisfies the following relationship: 0< |f4 / f7| < 1; 0< |f1 / f23| <1; 0.4< |f1 / f56| <1.2; Among them, f1 is the effective focal length of the first lens, f4 is the effective focal length of the fourth lens, f7 is the effective focal length of the seventh lens, f23 is the effective combined focal length of the second lens and the third lens, and f56 is the effective combined focal length of the fifth lens and the sixth lens.

6. The high-pixel and large-aperture vehicle-mounted optical imaging system according to any one of claims 1 to 3, characterized in that: The optical imaging system satisfies the following relationship: 15 < vd4 / nd4 < 55; 10 < vd7 / nd7 < 55; 1.49 < nd5 < 1.85; 1.49 < nd6 < 1.85; Among them, nd4 is the refractive index of the fourth lens, vd4 is the Abbe number of the fourth lens; nd7 is the refractive index of the seventh lens, vd7 is the Abbe number of the seventh lens, nd5 is the refractive index of the fifth lens, and nd6 is the refractive index of the sixth lens.

7. The high-pixel and large-aperture vehicle-mounted optical imaging system according to any one of claims 1 to 3, characterized in that: The optical imaging system satisfies the following relationship: 0.5 < f / BFL < 3; and / or 0.2 < CT1 / ET1 < 1.5; Wherein, f is the effective focal length of the first lens, BFL is the distance from the image side of the seventh lens to the imaging plane on the optical axis, CT1 is the center thickness of the first lens, and ET1 is the edge thickness of the first lens.

8. The high-pixel and large-aperture vehicle-mounted optical imaging system according to any one of claims 1 to 3, characterized in that: The optical imaging system satisfies the following relationship: 0.1 < TTL / DFOV <1.0, DFOV is the field of view of the optical imaging system, and TTL is the distance from the object side surface of the first lens of the optical imaging system to the imaging surface.

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

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

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