Optical imaging system and camera module applied by same

Abstract

The utility model provides an optical imaging system and a camera module applying the same, the optical imaging system is composed of seven lenses, the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has focal power, the object side surface is a concave surface, and the image side surface is a convex surface; the third lens has positive focal power; the fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface; the fifth lens has focal power; the sixth lens has focal power; the seventh lens has focal power, and the object side surface of the seventh lens is a convex surface; by selecting a proper number of lenses and reasonably configuring the refractive power and the surface type of each lens, the optical lens has the advantages of large light flux, small volume, good imaging quality, large field angle and the like, can better capture detail information of an object, improves the detail capturing capability of the optical lens for shooting the object, improves the picture texture of the optical lens, and improves the image quality of the optical lens. The resolution and the imaging definition of the optical lens are improved, so that the high-definition imaging requirement of people on the vehicle-mounted optical lens is met.

Description

Technical Field

[0001] The present application relates to the field of optical imaging, and in particular to an optical imaging system and a camera module thereof. Background Art

[0002] With the rapid development of the automotive industry, the performance of on-board cameras is becoming more and more high-end. The size of chips is increasing, and the number of pixels is also increasing. Pixels greater than 3 million are becoming the mainstream. Therefore, the design requirements of lenses are also increasing so that they can perfectly match the chips and obtain ideal image quality. While ensuring the pixels, ultra-wide-angle lenses are becoming more and more popular. They have a wide field of view and a wide field of view. In addition, in darker environments such as night or rainy days, optical lenses are required to have a large amount of light intake to achieve good imaging quality in low-light environments. At the same time, the optical lens is also required to meet the resolution requirements in high and low temperature environments, so that the image clarity meets the use requirements, and the optical lens can meet the requirements of low cost and lightweight.

[0003] However, the optical lens in the prior art is limited by factors such as installation location and processing, making it difficult for the optical lens to take into account miniaturization, high resolution, large field of view angle range and large aperture at the same time. In addition, although the optical lens in the prior art can achieve a resolution of one million pixels, the aberration problems of the optical lens such as chromatic aberration, astigmatism, distortion, etc. are relatively serious. Moreover, the light transmission capacity is not strong, and the imaging noise is large in environments with weak light such as night or rainy days. At the same time, it will also produce adverse effects such as unclear images in high and low temperature environments. The thermal stability of the optical lens is poor. After returning from high temperature to normal temperature, the resolution ability is difficult to meet the requirements, and the cost is high and the quality is heavy. Utility Model Content

[0004] In order to solve the problems of large size and general resolution of existing industrial lenses, the utility model provides an optical imaging system and a camera module used therein, which is composed of 7 lenses. By selecting a suitable number of lenses and reasonably configuring the refractive power and surface shape of each lens, the optical lens has the advantages of large light throughput, small size, good imaging quality, and a large field of view. At the same time, it can also better capture the detailed information of the object, improve the ability of the optical lens to capture the details of the photographed object, improve the image quality of the optical lens, and improve the resolution and imaging clarity of the optical lens to meet people's high-definition imaging requirements for vehicle-mounted optical lenses.

[0005] The technical solution adopted in this application is:

[0006] An 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 an object plane to an image plane along an optical axis;

[0007] The first lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0008] The second lens has an optical power, an object side surface thereof is concave, and an image side surface thereof is convex;

[0009] The third lens has positive optical power;

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

[0011] The fifth lens has optical power;

[0012] The sixth lens has optical power;

[0013] The seventh lens has optical power, and its object side surface is convex.

[0014] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0015] 1.4≤f / EPD≤1.6;

[0016] Wherein, f is the effective focal length of the optical imaging system, and EPD is the entrance pupil diameter of the optical imaging lens.

[0017] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0018] 110 <FOV / (TTL / IamgH / DT11)<140;

[0019] Among them, FOV is the maximum field of view of the optical imaging system, DT11 is the maximum effective radius of the object side of the first lens, TTL is the axial distance from the object side of the first lens to the imaging surface, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface.

[0020] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0021] 0 <f5 / (f5+f6)<2.8;

[0022] Wherein, f5 is the effective focal length of the fifth lens, and f6 is the effective focal length of the sixth lens.

[0023] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0024] 1.8 <f345 / f<3.1;

[0025] Wherein, f345 is the effective combined focal length of the third lens, the fourth lens and the fifth lens, and f is the effective focal length of the optical imaging system.

[0026] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0027] 0.6<|f123| / f4567<3.5;

[0028] Among them, f123 is the effective combined focal length of the first lens, the second lens and the third lens, and f4567 is the effective combined focal length of the fourth lens, the fifth lens, the sixth lens and the seventh lens.

[0029] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0030] 0<|(SAG14-SAG13) / (SAG8-SAG7)|<1.2;

[0031] Among them, SAG7 is the distance from the maximum effective aperture of the image side of the third lens to the intersection of the image side of the third lens and the optical axis in the direction parallel to the optical axis, SAG8 is the distance from the maximum effective aperture of the image side of the fourth lens to the intersection of the image side of the fourth lens and the optical axis in the direction parallel to the optical axis, SAG13 is the distance from the maximum effective aperture of the object side of the seventh lens to the intersection of the object side of the seventh lens and the optical axis in the direction parallel to the optical axis, and SAG14 is the distance from the maximum effective aperture of the image side of the seventh lens to the intersection of the image side of the seventh lens and the optical axis in the direction parallel to the optical axis.

[0032] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0033] 1.2 <T12 / (SAG2+SAG3)<3.4;

[0034] 3.2 <DT32 / SAG7<6.2;

[0035] Among them, SAG2 is the distance from the maximum effective aperture of the image side of the first lens to the intersection of the image side of the first lens and the optical axis in the direction parallel to the optical axis, SAG3 is the distance from the maximum effective aperture of the object side of the second lens to the intersection of the object side of the second lens and the optical axis in the direction parallel to the optical axis, and T12 is the distance from the image side of the first lens to the object side of the second lens on the optical axis.

[0036] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0037] 3.2 <DT32 / SAG7<6.2;

[0038] Among them, SAG7 is the distance from the maximum effective aperture of the image side of the third lens to the intersection of the image side of the third lens and the optical axis in the direction parallel to the optical axis, and DT32 is the maximum effective radius of the image side of the third lens.

[0039] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0040] 0.3<(CT6+CT7) / BFL<1.7;

[0041] Wherein, CT6 is the thickness of the sixth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, and BFL is the minimum distance from the image side surface of the seventh lens to the imaging surface of the optical system in the optical axis direction.

[0042] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0043] 2.6 <CT3 / |SAG5|<6.0;

[0044] Among them, CT3 is the thickness of the third lens on the optical axis, and SAG5 is the distance from the maximum effective aperture of the object side of the third lens to the intersection of the object side of the third lens and the optical axis in the direction parallel to the optical axis.

[0045] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0046] 0.5<(R7-R8) / R7<3.6;

[0047] Wherein, R7 is the curvature radius of the object side of the fourth lens, and R8 is the curvature radius of the image side of the fourth lens.

[0048] An optical imaging system as described above, wherein the optical imaging system satisfies the following relationship:

[0049] 0.3<(R13+R14) / |R13-R14|<3.8;

[0050] Wherein, R13 is the curvature radius of the object side surface of the seventh lens, and R14 is the curvature radius of the image side surface of the seventh lens.

[0051] The optical imaging system as described above has an F number of 1.4 to 1.6; and a total optical length of 21 mm or less.

[0052] In the optical imaging system as described above, the seventh lens is an aspherical lens, one of the second lens, the third lens and the sixth lens is an aspherical lens, and the remaining lenses are spherical lenses.

[0053] On the other hand, an embodiment of the present application further provides a camera module, which includes at least an optical lens, in which the above-mentioned optical imaging system is installed.

[0054] Compared with the prior art, the beneficial effects of this application are as follows:

[0055] The utility model provides an optical imaging system and a camera module used therein, which is composed of 7 lenses. By selecting a suitable number of lenses and reasonably configuring the refractive power and surface shape of each lens, the optical lens has the advantages of large light throughput, small size, good imaging quality, large field of view, etc. At the same time, it can also better capture object detail information, improve the optical lens's ability to capture details of the photographed object, improve the image quality of the optical lens, and improve the resolution and imaging clarity of the optical lens, so as to meet people's high-definition imaging requirements for vehicle-mounted optical lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] 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.

[0057] Figure 1 It is a structural schematic diagram of an optical imaging system or camera module according to Embodiment 1 of the present application;

[0058] Figure 2 is the axial chromatic aberration, astigmatism and distortion curve of the optical imaging system or camera module in Example 1 of the present application;

[0059] Figure 3 It is a structural schematic diagram of an optical imaging system or camera module according to Embodiment 2 of the present application;

[0060] Figure 4 is the axial chromatic aberration, astigmatism and distortion curve of the optical imaging system or camera module in Example 2 of the present application;

[0061] Figure 5 It is a structural schematic diagram of an optical imaging system or camera module according to Embodiment 3 of the present application;

[0062] Figure 6 The axial chromatic aberration, astigmatism and distortion curves of the optical imaging system or camera module of Example 3 of the present application;

[0063] Figure 7 It is a structural schematic diagram of an optical imaging system or camera module according to Embodiment 4 of the present application;

[0064] Figure 8 These are the axial chromatic aberration, astigmatism and distortion curves of the optical imaging system or camera module of Example 4 of the present application. DETAILED DESCRIPTION

[0065] An 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 an object plane to an image plane along an optical axis;

[0066] The first lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0067] The second lens has an optical power, an object side surface thereof is concave, and an image side surface thereof is convex;

[0068] The third lens has positive optical power;

[0069] The fourth lens has positive refractive power, and its object side surface is convex;

[0070] The fifth lens has optical power;

[0071] The sixth lens has optical power;

[0072] The seventh lens has optical power, and its object side surface is convex.

[0073] The optical imaging system of the embodiment of the present application is composed of 7 lenses. By selecting a suitable number of lenses and reasonably configuring the refractive power and surface shape of each lens, the optical lens has the advantages of large light throughput, small size, good imaging quality, and a large field of view. At the same time, it can also better capture the detailed information of the object, improve the ability of the optical lens to capture the details of the photographed object, improve the image quality of the optical lens, and improve the resolution and imaging clarity of the optical lens to meet people's high-definition imaging requirements for vehicle-mounted optical lenses.

[0074] Furthermore, the optical imaging system satisfies the following relationship:

[0075] 1.4≤f / EPD≤1.6;

[0076] 110 <FOV / (TTL / IamgH / DT11)<140;

[0077] Among them, f is the effective focal length of the optical imaging system, EPD is the entrance pupil diameter of the optical imaging lens, FOV is the maximum field angle of the optical imaging system, DT11 is the maximum effective radius of the object side of the first lens, TTL is the axial distance from the object side of the first lens to the imaging surface, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface. This relationship reflects the constraints of the optical lens on the field angle and thinness, so that the optical system has good thinness while meeting the wide-angle requirements, ensuring that the optical system has the characteristics of wide angle, large aperture, miniaturization, and thinness. When it is lower than the lower limit of the relationship, on the basis of ensuring that the field angle of the optical lens is wide, TTL / IamgH / DT11 further increases, and the optical lens is difficult to obtain good imaging resolution; exceeding the upper limit of the relationship will over-compress the thinness of the optical lens, which is not conducive to the improvement of the performance of the optical lens.

[0078] Furthermore, the optical imaging system satisfies the following relationship:

[0079] 0 <f5 / (f5+f6)<2.8;

[0080] Among them, f5 is the effective focal length of the fifth lens, and f6 is the effective focal length of the sixth lens. By reasonably allocating the ratio of the focal length of the fifth and sixth optical components close to the image plane within a reasonable range, the spherical aberration remaining after balancing can balance the spherical aberration generated by the first four lenses, thereby fine-tuning and controlling the spherical aberration of the system and strengthening the precise control of the on-axis field aberration.

[0081] Furthermore, the optical imaging system satisfies the following relationship:

[0082] 1.8 <f345 / f<3.1;

[0083] Among them, f345 is the effective combined focal length of the third lens, the fourth lens and the fifth lens, and f is the effective focal length of the optical imaging system. By constraining the ratio of the combined focal length of the third lens, the fourth lens and the fifth lens to the effective focal length of the optical lens, the focal length of the third lens, the fourth lens and the fifth lens can be properly distributed, so that the fourth lens can produce a variety of coordination, thereby meeting the miniaturization design of the optical lens and achieving the balance of the internal aberration of the optical lens, which helps to adjust the field curvature and astigmatism of the imaging edge of the optical lens, and meet the imaging quality of the optical lens for the surrounding environment.

[0084] Furthermore, the optical imaging system satisfies the following relationship:

[0085] 0.6<|f123| / f4567<3.5;

[0086] Among them, f123 is the effective combined focal length of the first lens, the second lens and the third lens, and f4567 is the effective combined focal length of the fourth lens, the fifth lens, the sixth lens and the seventh lens. By controlling the ratio of the combined focal length of the first lens and the second lens to the combined focal length of the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens within a reasonable range, the incident angle of the incident light can be controlled to reduce the high-order aberrations of the optical system, thereby improving the imaging quality of the optical system; at the same time, when the above relationship is satisfied, the refraction angle of the principal light of the seventh lens image side can be reduced, so that the principal light is incident on the image sensor at a more appropriate angle, thereby enhancing the matching of the incident angle of the principal light of the lens and the image sensor, and improving the relative brightness of the optical lens, thereby achieving high-quality imaging of the optical lens.

[0087] Further, the optical imaging system satisfies the following relationship: 0<|(SAG14-SAG13) / (SAG8-SAG7)|<1.2, wherein SAG7 is the distance from the maximum effective aperture of the object side of the fourth lens to the intersection of the object side of the fourth lens and the optical axis in the direction parallel to the optical axis, SAG8 is the distance from the maximum effective aperture of the image side of the fourth lens to the intersection of the image side of the fourth lens and the optical axis in the direction parallel to the optical axis, SAG13 is the distance from the maximum effective aperture of the object side of the seventh lens to the intersection of the object side of the seventh lens and the optical axis in the direction parallel to the optical axis, and SAG14 is the distance from the maximum effective aperture of the image side of the seventh lens to the intersection of the image side of the seventh lens and the optical axis in the direction parallel to the optical axis. By limiting the range of the vector height ratio between the object side and image side of the fourth lens and the seventh lens, the shapes of the object side and image side of the fourth lens and the seventh lens can be constrained to correct the field curvature of the imaging optical lens, reduce the risk of ghost images, and thus improve the imaging quality of the optical lens. When the ratio is higher than the upper limit, the sagittal height of the image side of the seventh lens is too large, making the image side of the seventh lens too curved, which is not conducive to the manufacturing, molding and assembly of the seventh lens and easily leads to a decrease in the imaging quality of the optical lens.

[0088] Furthermore, the optical imaging system satisfies the following relationship: 1.2 < T12 / (SAG2 + SAG3) < 3.4, where T12 is the distance on the optical axis from the image side of the first lens to the object side of the second lens, SAG2 is the distance parallel to the optical axis from the maximum effective clear aperture of the image side of the first lens to the intersection of the image side of the first lens and the optical axis, and SAG3 is the distance parallel to the optical axis from the maximum effective clear aperture of the object side of the second lens to the intersection of the object side of the second lens and the optical axis. By making the optical system satisfy the above relationship, the sag of the image side of the first lens can be effectively controlled. In conjunction with the change in the distance on the optical axis from the image side of the first lens to the object side of the second lens, the total length of the optical system can be effectively reduced to meet the requirements of miniaturization. At the same time, the limitation on the sag of the image side of the first lens is also conducive to reducing the risk of ghost image generation. Below the lower limit of the relationship, the sag of the image side of the first lens is too large, which easily leads to severe deflection of marginal rays and is not conducive to reducing marginal aberration, thereby reducing the imaging quality of the optical system; exceeding the upper limit of the relationship, the distance on the optical axis from the image side of the first lens to the object side of the second lens increases, and the arrangement space between the remaining lenses decreases, resulting in an increase in the sensitivity of the spacer thickness of the optical system, which is not conducive to the assembly of the optical system.

[0089] Further, the optical imaging system satisfies the following relationship: 3.2 < DT32 / SAG7 < 6.2, where DT32 is the maximum effective radius of the image side of the third lens, and SAG7 is the distance parallel to the optical axis from the maximum effective clear aperture of the image side of the third lens to the intersection of the image side of the third lens and the optical axis. By controlling the ratio range of the maximum effective radius of the image side of the third lens to the sag at the maximum effective aperture, it is beneficial for the third lens to effectively receive large-angle light rays incident from the second lens and reduce the risk of marginal aberration. Below the lower limit of the relationship, the sag value of the image side of the third lens becomes larger, and the third lens is too curved, which easily leads to severe deflection of marginal rays, is not conducive to correcting the aberration of the optical system, thereby reducing the imaging quality of the optical system and increasing the risk of marginal field curvature aberration; exceeding the upper limit of the relationship, the maximum effective radius of the image side of the third lens increases, which is not conducive to limiting the range of incident light rays, affects the imaging quality, and will also affect the aperture size of the image side of the second lens, which is not conducive to the processing of the optical system.

[0090] Furthermore, the following relationship is satisfied: 0.3<(CT6+CT7) / BFL<1.7, wherein CT6 is the thickness of the sixth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, and BFL is the minimum distance from the image side of the seventh lens to the imaging surface of the optical system in the optical axis direction (also referred to as the back focal length). By limiting the range of the above conditional expression, the back focal length of the optical system can be controlled within a reasonable range, thereby effectively ensuring the matching degree between the camera screen and the image sensor, and ensuring the matching of the optical system and the image sensor; while controlling the thickness of the sixth lens and the seventh lens on the optical axis, the compactness of the rear group structure can be effectively improved, thereby reducing the total optical length of the optical system, and better developing in the direction of miniaturization, and the sixth lens and the seventh lens are combined. The lens molding and assembly reduce the production cost of the optical system, and also reduce the eccentricity sensitivity of the optical system, which is conducive to ensuring the imaging effect of the optical system.

[0091] Furthermore, the optical imaging system satisfies the following relationship: 0.5<(R7-R8) / R7<3.6, where R7 is the radius of curvature of the object side of the fourth lens, and R8 is the radius of curvature of the image side of the fourth lens. By limiting the ratio range of the radius of curvature of the object side and the image side of the fourth lens, the shape of the fourth lens can be effectively constrained, and then the aberration contribution rate of the object side and image side surfaces of the fourth lens can be effectively controlled to effectively balance the aberrations related to the system and the aperture band, thereby effectively improving the imaging quality of the system.

[0092] Further, the optical imaging system satisfies the following relationship: 0.3<(R13+R14) / |R13-R14|<3.8, wherein R13 is the radius of curvature of the object side of the seventh lens, and R14 is the radius of curvature of the image side of the seventh lens. By controlling the range of the above conditional expression, the shape of the seventh lens can be reasonably configured, which is beneficial to reducing the aberration generated by the seventh lens and improving the molding yield of the seventh lens. If the upper limit of the above conditional expression is exceeded, the radius of curvature of the object side of the seventh lens is too small, and the light is easily reflected between the seventh lens and the fourth lens to produce ghost images, which is not conducive to improving the imaging quality. If the value is lower than the lower limit of the above conditional expression, the absolute value of the radius of curvature of the image side of the seventh lens is too small, resulting in excessive curvature of the seventh lens, which is not conducive to the processing and molding of the seventh lens.

[0093] Further, the optical imaging system satisfies the following relationship: 2.6 < CT3 / |SAG5| < 6.0, where CT3 is the thickness of the third lens on the optical axis, and SAG5 is the distance parallel to the optical axis from the maximum effective light-passing aperture of the object side of the third lens to the intersection of the object side of the third lens and the optical axis. By defining the range of the above conditional formula, the ratio of the central thickness of the third lens to the sagittal height of the object side can be reasonably configured, which is beneficial to the reasonable deflection of light when passing through the third lens, thereby improving the imaging quality of the system. At the same time, it is also beneficial to expand the aperture of the third lens, enabling light to exit from the third lens at a larger angle, which is conducive to increasing the imaging surface of the system and achieving a large image surface effect. Exceeding the upper limit of the above conditional formula, the sagittal height of the object side of the third lens is too small, resulting in excessive deflection of marginal light when passing through the third lens, thereby increasing the marginal aberration of the system and being unfavorable for improving the imaging quality. Below the lower limit of the above conditional formula, the central thickness of the third lens is too small, and the ratio of thicknesses at various parts of the third lens changes too much, which is not conducive to the reasonable deflection of light, reducing the MTF value of the system and resulting in a decrease in the system resolution.

[0094] Specifically, as a preferred implementation manner of the present invention rather than a limitation, in Embodiment 1 and Embodiment 4, the second lens and the seventh lens are aspherical lenses, and the rest are spherical lenses, and they are all separated by air gaps. In Embodiment 2, the third lens and the seventh lens are aspherical lenses, and the rest are spherical lenses, and they are all separated by air gaps. In Embodiment 3, the sixth lens and the seventh lens are aspherical lenses, and the rest are spherical lenses, and they are all separated by air gaps; the F number of the optical imaging system is 1.4 to 1.6; the total optical length of the optical imaging system ≤ 21 mm. The embodiments of the present invention disclose a 2P5G optical system. By selecting 2 aspherical lenses and 5 spherical lenses and reasonably configuring the refractive power and surface shape of each lens, the optical lens has advantages such as large light-passing amount, small volume, good imaging quality, and large field of view. At the same time, it can also better capture the detailed information of the object, improve the ability of the optical lens to capture the details of the photographed object, improve the texture of the optical lens, and improve the resolution and imaging clarity of the optical lens to meet the high-definition imaging requirements for vehicle-mounted optical lenses.

[0095] Embodiment 1

[0096] Specifically, as a preferred implementation manner of the present invention rather than a limitation, the following refers to Figure 1 to Figure 2 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.

[0097] As Figure 1As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, 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 S16.

[0098] 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 positive power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative power, and its object side surface S10 is concave, and its image side surface S11 is concave. The seventh lens E7 has positive power, and its object side surface S12 is convex, and its image side surface S13 is convex. The filter E8 has an object side surface S14 and an image side surface S15. The light from the object passes through each surface S1 to S15 in sequence and is finally imaged on the imaging surface S16.

[0099] 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).

[0100] Table 1: Basic parameters of the optical imaging system of Example 1

[0101] Face number Surface type Curvature radius (mm) Thickness(mm) Material OBJ Spherical endless endless S1 Spherical 23.8015 0.8000 1.62,60.32 S2 Spherical 3.2919 2.5147 S3 Q-type aspheric -38.0445 3.6671 1.66,20.38 S4 Q-type aspheric -22.0905 0.6780 S5 Spherical -5.3144 2.0776 1.62,60.32 S6 Spherical -5.5520 0.4752 STO Spherical endless -0.3752 S7 Spherical 8.5916 1.9486 1.60,61.60 S8 Spherical -9.3677 0.1000 S9 Spherical 7.1301 2.4036 1.62,60.43 S10 Spherical -5.6375 0.5000 1.76,27.58 S11 Spherical 6.4569 1.1048 S12 Q-type aspheric 20.3904 0.9217 1.54,55.77 S13 Q-type aspheric -9.4488 0.6405 S14 Spherical endless 0.64 S15 Spherical endless 2.9058 1.52,64.21 S16 Spherical endless

[0102] 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 Q-type aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0103]

[0104] Wherein, Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, r is the radial coordinate of the aspherical surface, c is the curvature of the vertex of the aspherical surface, K is the cone coefficient, Am is the aspherical coefficient, rmax is the maximum radial radius coordinate, and u=r / rmax. Table 2 shows the cone coefficients and high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 of each aspherical surface that can be used in the first embodiment.

[0105] Table 2: Aspheric surface related values ​​of the lens surface of Example 1

[0106] Surface number S3 S4 S12 S13 K -2.51E+01 -4.86E+01 2.12E+01 9.01E+00 A4 -8.12E-02 1.69E-01 -4.47E-01 -7.28E-02 A6 -3.14E-03 6.66E-02 -4.29E-02 9.81E-03 A8 -6.67E-04 3.54E-02 1.85E-03 1.99E-02 A10 1.09E-03 2.01E-02 3.33E-03 1.03E-02 A12 1.28E-03 8.65E-03 1.06E-03 4.76E-03 A14 1.07E-03 2.71E-03 2.66E-05 1.98E-03 A16 7.02E-04 7.33E-04 -1.53E-04 1.06E-03 A18 4.00E-04 2.07E-04 -1.92E-04 5.00E-04 A20 1.60E-04 -8.44E-05 -1.87E-04 2.66E-04 A22 2.35E-05 -3.00E-04 -1.30E-04 1.17E-04 A24 -4.54E-05 -3.11E-04 -8.74E-05 9.29E-05 A26 -5.72E-05 -1.70E-04 -7.54E-05 3.09E-05 A28 -3.90E-05 -2.52E-05 -5.32E-05 1.37E-06 A30 -1.31E-05 8.27E-06 -1.89E-05 -1.52E-05

[0107] Figure 2 The axial chromatic aberration, astigmatism and distortion curves of the optical imaging lens of Example 1 are shown. Axial chromatic aberration indicates that light of different wavelengths deviates from the focal point after passing through the lens; astigmatism indicates the meridional image curvature and sagittal image curvature; distortion indicates the distortion magnitude value corresponding to different image heights. The optical imaging lens given in Example 1 of the present application can achieve good imaging quality.

[0108] Embodiment 2

[0109] Specifically, as a preferred embodiment of the present invention but not limiting, the following reference is made to Figure 3 to Figure 4 An optical imaging lens according to Embodiment 2 of the present application is described. Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown.

[0110] like Figure 3 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, 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 S16.

[0111] 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 positive power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S10 is convex, and its image side surface S11 is convex. The seventh lens E7 has negative power, and its object side surface S12 is convex, and its image side surface S13 is concave. The filter E8 has an object side surface S14 and an image side surface S15. The light from the object passes through each surface S1 to S15 in sequence and is finally imaged on the imaging surface S16.

[0112] 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).

[0113] Table 3: Basic parameters of the optical imaging system of Example 2

[0114] Face number Surface type Curvature radius (mm) Thickness(mm) Material OBJ Spherical endless endless S1 Spherical 12.3477 0.8208 1.62,60.32 S2 Spherical 2.8890 3.2325 S3 Spherical -4.9086 2.8454 1.74,44.85 S4 Spherical -6.0659 0.1000 S5 Q-type aspheric 26.6821 1.2942 1.64,23.53 S6 Q-type aspheric -46.0069 0.4444 STO Spherical endless -0.3108 S7 Spherical 8.0245 3.2604 1.60,61.61 S8 Spherical -5.4571 0.2181 S9 Spherical -38.5940 0.5000 1.75,27.58 S10 Spherical 4.7265 3.9335 1.54,65.40 S11 Spherical -5.3136 0.1993 S12 Q-type aspheric 17.5248 1.1570 1.64,23.53 S13 Q-type aspheric 6.4846 0.3311 S14 Spherical endless 0.64 S15 Spherical endless 2.3342 1.52,64.21 S16 Spherical endless

[0115] In Table 1, the object side surface and the image side surface of any lens of the third lens E3 and the seventh lens E7 are both Q-type aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical formula:

[0116]

[0117] Wherein, Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, r is the radial coordinate of the aspherical surface, c is the curvature of the vertex of the aspherical surface, K is the cone coefficient, Am is the aspherical coefficient, rmax is the maximum radial radius coordinate, and u=r / rmax. Table 4 shows the cone coefficients and high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 of each aspherical surface that can be used in the first embodiment.

[0118] Table 4: Aspheric surface related values ​​of lens surface in Example 2

[0119] Surface number S5 S6 S12 S13 K -9.00E+01 -9.00E+01 -8.61E+00 -1.61E+01 A4 2.44E-01 3.07E-01 -3.87E-01 -2.91E-01 A6 -1.02E-03 2.15E-02 4.85E-03 6.64E-03 A8 -4.95E-03 6.70E-05 4.46E-04 2.85E-03 A10 3.51E-05 -1.79E-04 -1.84E-04 -8.92E-04 A12 8.21E-04 4.77E-04 1.05E-04 3.04E-04 A14 6.23E-04 3.79E-04 -5.66E-05 -1.23E-04 A16 1.81E-04 3.81E-04 2.44E-05 3.81E-05 A18 -9.37E-05 2.12E-04 -1.29E-05 -6.72E-06 A20 -2.70E-04 1.84E-04 3.63E-06 9.20E-07 A22 -3.10E-04 9.25E-05 7.67E-08 -9.37E-08 A24 -2.77E-04 6.65E-05 1.30E-07 -2.62E-08 A26 -1.61E-04 1.19E-05 -5.84E-08 1.93E-09 A28 -5.53E-05 5.88E-06 -3.75E-08 8.69E-10 A30 6.39E-06 -1.21E-05 1.00E-08 4.45E-11

[0120] Figure 4 The axial chromatic aberration, astigmatism and distortion curves of the optical imaging lens of Example 2 are shown. Axial chromatic aberration indicates that light of different wavelengths deviates from the focal point after passing through the lens; astigmatism indicates the meridional image curvature and sagittal image curvature; distortion indicates the distortion magnitude value corresponding to different image heights. The optical imaging lens provided in Example 2 of the present application can achieve good imaging quality.

[0121] Embodiment 3

[0122] Specifically, as a preferred embodiment of the present invention but not limiting, the following reference is made to Figures 5 and 6 An optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0123] like Figure 5 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, 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 S16.

[0124] 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 convex. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative 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 S10 is concave, and its image side surface S11 is concave. The seventh lens E7 has positive power, and its object side surface S12 is convex, and its image side surface S13 is concave. The filter E8 has an object side surface S14 and an image side surface S15. The light from the object passes through each surface S1 to S15 in sequence and is finally imaged on the imaging surface S16.

[0125] 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).

[0126] Table 5: Basic parameters of the optical imaging system of Example 3

[0127] Face number Surface type Curvature radius (mm) Thickness(mm) Material OBJ Spherical endless endless S1 Spherical 12.3608 0.7000 1.68,51.64 S2 Spherical 3.0920 3.2476 S3 Spherical -5.6350 4.1227 1.74,52.68 S4 Spherical -7.7460 0.1000 S5 Spherical 7.7394 1.4579 1.75,32.98 S6 Spherical 36.1480 0.4299 STO Spherical endless -0.1144 S7 Spherical 6.3182 2.0596 1.95,17.94 S8 Spherical 3.0698 2.3907 1.59,68.35 S9 Spherical -8.8409 0.1122 S10 Q-type aspheric -20.7408 0.6701 1.58,42.19 S11 Q-type aspheric 6.5788 0.5680 S12 Q-type aspheric 3.1925 1.6181 1.50,81.61 S13 Q-type aspheric 21.1496 0.6616 S14 Spherical endless 0.6 S15 Spherical endless 2.2496 1.52,64.21 S16 Spherical endless

[0128] In Table 5, the object side surface and the image side surface of any one of the sixth lens E6 and the seventh lens E7 are both Q-type aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0129]

[0130] Wherein, Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, r is the radial coordinate of the aspherical surface, c is the curvature of the vertex of the aspherical surface, K is the cone coefficient, Am is the aspherical coefficient, rmax is the maximum radial radius coordinate, and u=r / rmax. Table 6 shows the cone coefficients and high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 of each aspherical surface that can be used in the first embodiment.

[0131] Table 6: Aspheric surface related values ​​of lens surface in Example 3

[0132] Surface number S10 S11 S12 S13 K 3.97E+01 -2.56E+01 -1.10E-01 3.84E+01 A4 -3.05E-01 -5.99E-01 -9.37E-01 9.97E-02 A6 9.82E-02 1.17E-01 4.55E-02 6.52E-03 A8 -1.15E-03 -2.92E-02 -2.20E-02 5.65E-03 A10 9.89E-03 1.02E-02 1.73E-03 -2.07E-03 A12 -1.38E-03 -5.90E-04 -1.85E-03 -3.27E-04 A14 -1.80E-03 2.01E-03 2.89E-04 -3.80E-04 A16 -2.73E-03 -7.50E-04 -1.60E-04 -4.41E-06 A18 -1.14E-03 -3.33E-04 3.27E-05 -1.77E-04 A20 -2.34E-04 -5.60E-04 -2.55E-05 -4.90E-05 A22 2.72E-04 -2.64E-04 3.77E-06 -9.63E-05 A24 2.57E-04 -1.46E-04 9.43E-07 -2.97E-05 A26 8.92E-05 -2.87E-05 4.49E-06 -4.60E-05 A28 -2.87E-05 -1.39E-05 -4.39E-06 -2.16E-05 A30 -2.56E-05 -8.20E-06 8.78E-07 -2.52E-05

[0133] Figure 6The axial chromatic aberration, astigmatism and distortion curves of the optical imaging lens of Example 3 are shown. Axial chromatic aberration indicates that light of different wavelengths deviates from the focal point after passing through the lens; astigmatism indicates the meridian image curvature and sagittal image curvature; distortion indicates the distortion magnitude value corresponding to different image heights. The optical imaging lens given in Example 3 of the present application can achieve good imaging quality.

[0134] Embodiment 4:

[0135] Specifically, as a preferred embodiment of the present invention but not limiting, the following reference is made to Figures 7 and 8 An optical imaging lens according to Embodiment 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown.

[0136] 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, an infrared filter E8 and an imaging surface S16.

[0137] 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 convex. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has negative power, and its object side surface S10 is convex, and its image side surface S11 is convex. The seventh lens E7 has positive power, and its object side surface S12 is convex, and its image side surface S13 is concave. The filter E8 has an object side surface S14 and an image side surface S15. The light from the object passes through each surface S1 to S15 in sequence and is finally imaged on the imaging surface S16.

[0138] Table 7 shows the surface type, curvature radius, thickness and material of each lens of the optical imaging lens of Example 4, wherein the units of the curvature radius and thickness are both millimeters (mm).

[0139] Table 7: Basic parameters of the optical imaging system of Example 4

[0140] Face number Surface type Curvature radius (mm) Thickness(mm) Material OBJ Spherical endless endless S1 Spherical 15.4120 1.6766 1.83,42.73 S2 Spherical 3.1427 5.1118 S3 Q-type aspheric -4.2932 0.8000 1.54,55.77 S4 Q-type aspheric -5.9065 0.4283 S5 Spherical endless 0.1000 1.91,35.26 STO Spherical 13.3488 1.7346 S6 Spherical -1.04E+01 0.7719 S7 Spherical 5.9655 2.5310 1.62,63.41 S8 Spherical -15.4133 0.1387 S9 Spherical -15.7738 0.5000 1.92,20.88 S10 Spherical 4.1549 2.4697 1.62,63.41 S11 Spherical -10.5689 0.2790 S12 Q-type aspheric 17.2623 1.4387 1.54,55.77 S13 Q-type aspheric 29.9311 0.8615 S14 Spherical endless 0.64 S15 Spherical endless 1.5183 1.52,64.21 S16 Spherical endless

[0141] In Table 7, the object side surface and the image side surface of any one of the second lens E2 and the seventh lens E7 are both Q-type aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical formula:

[0142]

[0143] Wherein, Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, r is the radial coordinate of the aspherical surface, c is the curvature of the vertex of the aspherical surface, K is the cone coefficient, Am is the aspherical coefficient, rmax is the maximum radial radius coordinate, and u=r / rmax. Table 8 shows the cone coefficients and high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 of each aspherical surface that can be used in the first embodiment.

[0144] Table 8: Aspheric surface related values ​​of lens surface in Example 4

[0145] Surface number S10 S11 S12 S13 K -3.10E+00 -1.01E+01 -9.80E+01 7.58E+01 A4 1.22E-01 1.12E-01 -9.36E-01 -7.62E-01 A6 3.05E-02 5.23E-02 -5.55E-02 2.60E-03 A8 1.88E-03 3.81E-03 2.39E-02 8.94E-03 A10 6.03E-04 2.35E-03 5.55E-03 -5.49E-03 A12 1.29E-04 2.57E-04 -8.32E-04 -7.16E-04 A14 -7.45E-05 -2.95E-04 -2.34E-03 -1.14E-04 A16 -1.02E-04 -1.19E-04 -1.36E-03 3.73E-04 A18 -4.22E-05 -1.82E-04 -2.93E-04 -6.55E-04 A20 2.40E-05 -2.77E-04 5.58E-04 -9.42E-04 A22 3.12E-05 -4.81E-04 9.21E-04 -1.18E-03 A24 3.48E-05 -4.33E-04 8.97E-04 -8.31E-04 A26 2.14E-05 -3.20E-04 6.20E-04 -5.05E-04 A28 2.05E-05 -1.39E-04 2.87E-04 -1.63E-04 A30 1.18E-05 -5.86E-05 7.50E-05 -5.15E-05

[0146] Figure 8 The axial chromatic aberration, astigmatism and distortion curves of the optical imaging lens of Example 4 are shown. Axial chromatic aberration indicates that light of different wavelengths deviates from the focal point after passing through the lens; astigmatism indicates the meridional image curvature and sagittal image curvature; distortion indicates the distortion magnitude value corresponding to different image heights. Good imaging quality can be achieved.

[0147] In Examples 1-4, the basic data are shown in Table 9 below:

[0148] Table 9 Basic data of Examples 1-4

[0149] Basic data / Example 1 2 3 4 f1(mm) -6.23 -6.26 -6.27 -5.02 f2(mm) 72.17 660.84 -166.70 -35.39 f3(mm) 84.62 26.32 12.75 6.62 f4(mm) 7.80 5.96 30.57 7.26 f5(mm) 26.97 -23.24 -25.54 -11.95 f6(mm) -6.95 14.75 -8.56 -101.17 f7(mm) 12.12 -16.61 7.32 73.00 (mm) 3.40 3.39 3.31 3.20 TTL(mm) 21.00 21.00 21.00 21.00 HFOV(°) 63.78 65.82 66.52 65.56 f / EPD 1.50 1.40 1.60 1.50

[0150] In Examples 1-4, the conditional formula is shown in Table 10 below:

[0151] Table 10 Conditional formula of Example 1-4

[0152] Conditional / Example 1 2 3 4 CT3 2.08 1.29 1.46 1.73 CT6 0.50 3.93 0.67 2.47 CT7 0.92 1.16 1.62 1.44 BFL 4.19 3.15 3.24 3.00 R7 8.59 8.02 6.32 5.97 R8 -9.37 -5.46 3.07 -15.41 R13 20.39 17.52 3.19 17.26 R14 -9.45 6.48 21.15 29.93 FOV 127.56 131.65 133.04 131.12 IamG 3.69 3.80 3.80 3.80 f123 -11.16 -23.29 20.01 7.92 f345 7.63 10.37 6.01 7.97 f4567 6.38 6.70 8.60 11.81 SAG2 2.14 2.24 2.31 2.09 SAG3 -0.17 -0.84 -0.83 -0.56 SAG5 -0.68 0.31 0.56 0.29 SAG7 0.47 0.52 0.52 0.91 SAG8 -0.47 -0.99 1.06 -0.29 SAG13 -0.23 -0.46 1.01 -0.31 SAG14 -0.75 0.01 0.42 -0.23 T12 2.51 3.23 3.25 5.11 DT11 5.17 5.04 5.11 5.55 DT32 2.88 2.72 2.58 2.96 FOV / (TTL / IamgH / DT11) 115.73 120.05 123.00 131.79 f5 / (f5+f6) 1.35 2.74 0.75 0.11 f345 / f 2.25 3.06 1.82 2.49 |(SAG14-SAG13) / (SAG8-SAG7)| 0.55 0.32 1.11 0.07 T12 / (SAG2+SAG3) 1.28 2.32 2.19 3.33 DT32 / SAG7 6.15 5.25 4.93 3.23 (CT6+CT7) / BFL 0.34 1.62 0.71 1.30 (R7-R8) / R7 2.09 1.68 0.51 3.58 |f123| / f4567 1.75 3.48 2.33 0.67 (R13+R14) / |R13-R14| 0.37 2.17 1.36 3.73 CT3 / |SAG5| 3.06 4.11 2.61 5.96

[0153] A camera module at least comprises an optical lens, wherein an optical imaging system is installed in the optical lens, and the optical imaging system is composed of 7 lenses. By selecting a suitable number of lenses and reasonably configuring the refractive power and surface shape of each lens, the optical lens has the advantages of large light flux, small size, good imaging quality, large field of view, etc., and can also better capture object detail information, improve the optical lens's ability to capture details of the photographed object, improve the optical lens's image quality, and improve the optical lens's resolution and imaging clarity, so as to meet people's requirements for high-definition imaging of vehicle-mounted optical lenses.

[0154] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of the utility model is not limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or a number of technical deductions or replacements based on the concept of the utility model, shall be regarded as the protection scope of the utility model.

Claims

1. An optical imaging system, characterized in that: Along the optical axis from the object plane to the image plane, it includes the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens in sequence. The first lens has negative optical power, its object side surface is convex, and its image side surface is concave; The second lens has an optical power, an object side surface thereof is concave, and an image side surface thereof is convex; The third lens has positive optical power; The fourth lens has positive refractive power, and its object side surface is convex; The fifth lens has optical power; The sixth lens has optical power; The seventh lens has optical power, and its object side surface is convex.

2. An optical imaging system according to claim 1, characterized in that: The optical imaging system satisfies the following relationship: 1.4 ≤ f / EPD ≤ 1.6; Where f is the effective focal length of the optical imaging system, and EPD is the entrance pupil diameter of the optical imaging lens.

3. An optical imaging system according to claim 1, characterized in that: The optical imaging system satisfies the following relationship: 110 < FOV / (TTL / IamgH / DT11) < 140; Wherein, FOV is the maximum field of view of the optical imaging system, DT11 is the maximum effective radius of the object side of the first lens, TTL is the axial distance from the object side of the first lens to the imaging surface, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface.

4. An optical imaging system according to claim 1, characterized in that: The optical imaging system satisfies the following relationship: 0 < f5 / (f5+f6) < 2.8; and / or 1.8 < f345 / f < 3.1; and / or 0.6 < |f123| / f4567 < 3.5; Among them, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, f345 is the effective combined focal length of the third lens, the fourth lens and the fifth lens, f is the effective focal length of the optical imaging system, f123 is the effective combined focal length of the first lens, the second lens and the third lens, and f4567 is the effective combined focal length of the fourth lens, the fifth lens, the sixth lens and the seventh lens.

5. An optical imaging system according to any one of claims 1 to 4, characterized in that: The optical imaging system satisfies the following relationship: 0 < |(SAG14-SAG13) / (SAG8-SAG7)| < 1.2; and / or 1.2 < T12 / (SAG2+SAG3) < 3.4; and / or 3.2 < DT32 / SAG7 < 6.2; Among them, SAG2 is the distance from the maximum effective aperture of the image side of the first lens to the intersection of the image side of the first lens and the optical axis in the direction parallel to the optical axis, SAG3 is the distance from the maximum effective aperture of the object side of the second lens to the intersection of the object side of the second lens and the optical axis in the direction parallel to the optical axis, SAG7 is the distance from the maximum effective aperture of the image side of the third lens to the intersection of the image side of the third lens and the optical axis in the direction parallel to the optical axis, SAG8 is the distance from the maximum effective aperture of the image side of the fourth lens to the intersection of the image side of the fourth lens and the optical axis in the direction parallel to the optical axis, SAG13 is the distance from the maximum effective aperture of the object side of the seventh lens to the intersection of the object side of the seventh lens and the optical axis in the direction parallel to the optical axis, SAG14 is the distance from the maximum effective aperture of the image side of the seventh lens to the intersection of the image side of the seventh lens and the optical axis in the direction parallel to the optical axis, T12 is the distance from the image side of the first lens to the object side of the second lens on the optical axis, and DT32 is the maximum effective radius of the image side of the third lens.

6. An optical imaging system according to any one of claims 1 to 4, characterized in that: The optical imaging system satisfies the following relationship: 0.3 < (CT6+CT7) / BFL < 1.7; and / or 2.6 < CT3 / |SAG5| < 6.0; Among them, CT3 is the thickness of the third lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, BFL is the minimum distance from the image side of the seventh lens to the imaging surface of the optical imaging system in the direction of the optical axis, and SAG5 is the distance from the maximum effective aperture of the object side of the third lens to the intersection of the object side of the third lens and the optical axis in the direction parallel to the optical axis.

7. An optical imaging system according to any one of claims 1 to 4, characterized in that: The optical imaging system satisfies the following relationship: 0.5 < (R7-R8) / R7 < 3.6; and / or 0.3 < (R13+R14) / |R13-R14| < 3.8; Among them, R7 is the curvature radius of the object side of the fourth lens, R8 is the curvature radius of the image side of the fourth lens, R13 is the curvature radius of the object side of the seventh lens, and R14 is the curvature radius of the image side of the seventh lens.

8. An optical imaging system according to any one of claims 1 to 4, characterized in that: The F number of the optical imaging system is 1.4 to 1.6; the total optical length of the optical imaging system is ≤21 mm.

9. An optical imaging system according to any one of claims 1 to 4, characterized in that: The seventh lens is an aspherical lens, one of the second lens, the third lens and the sixth lens is an aspherical lens, and the remaining lenses are spherical lenses.

10. A camera module, comprising at least an optical lens, characterized in that: An optical imaging system according to any one of claims 1 to 9 is installed in the optical lens.

Images