Optical lenses, camera modules and electronic devices

Abstract

Embodiments of the present application disclose an optical lens, a camera module, and an electronic device. The optical lens sequentially includes, from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with negative refractive power, a fifth lens with refractive power, a sixth lens with refractive power, and a seventh lens with refractive power; the optical lens further includes a diaphragm; the optical lens satisfies the following relationship: 0.8 < TTL / f < 1.2, where TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and f is the effective focal length of the optical lens. In the optical lens of the embodiments of the present application, by reasonably controlling the focal length of the optical lens and the total length of the optical lens, not only can the miniaturization of the optical lens be achieved, but also better convergence of light on the imaging surface can be ensured.

Description

Technical Field

[0001] The present application relates to optical imaging technology, and in particular to an optical lens, a camera module and an electronic device. Background Art

[0002] With the widespread use of electronic products such as mobile phones, tablets, drones, and computers in life, various technological improvements have been introduced. Among them, the improvement and innovation of camera shooting effects in electronic products has become one of the focuses of people's attention. Whether electronic products can use cameras to shoot high-quality, high-resolution, and high-definition pictures has become a key factor for users to choose electronic products. However, in the camera lens, if the length of the lens is too short, the sensitivity of the optical lens will increase, and it will be unfavorable for the convergence of light on the imaging surface; if the length of the lens is too long, the main light angle of the light entering the imaging surface will be too large, which is not conducive to high-quality imaging. Summary of the invention

[0003] The optical lens of the embodiment of the present application comprises, from the object side to the image side, the following components in order:

[0004] A first lens having positive refractive power, a second lens having negative refractive power, a convex surface on the object side of the first lens near the optical axis, a convex surface on the image side of the second lens near the optical axis, a third lens having refractive power, a convex surface on the object side of the third lens near the optical axis, a concave surface on the image side of the third lens near the optical axis, a fourth lens having negative refractive power, a concave surface on the object side of the fourth lens near the optical axis, a fifth lens having refractive power, a concave surface on the object side of the fifth lens near the optical axis, a convex surface on the image side of the fifth lens near the optical axis, a sixth lens having refractive power, a concave surface on the object side of the sixth lens near the optical axis, a convex surface on the image side of the fifth lens near the optical axis, a seventh lens having refractive power, and a concave surface on the image side of the seventh lens near the optical axis.

[0005] The optical lens further comprises an aperture. The optical lens satisfies the following relationship: 0.9≤TTL / f≤1, wherein TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, and f is the effective focal length of the optical lens.

[0006] In the optical lens of the embodiment of the present application, when the above relationship is satisfied, the effective focal length of the optical lens and the total length of the optical lens are reasonably controlled, which can not only realize the miniaturization of the optical lens, but also ensure that the light is better converged on the imaging surface. If the lower limit of the relationship is exceeded, the length of the optical lens is too short, which will increase the assembly sensitivity of the optical lens and be unfavorable for the convergence of light on the imaging surface. If the upper limit of the relationship is exceeded, the length of the optical lens is too long, which will cause the main light angle of the light entering the imaging surface to be too large, and the edge field light of the optical lens cannot be imaged on the imaging surface, resulting in incomplete imaging information and reduced imaging quality.

[0007] In some embodiments, the optical lens satisfies the following relationship:

[0008] 1 <ETL2 / CTL2≤1.6;

[0009] Among them, ETL2 is the distance from the maximum effective aperture of the object side of the second lens to the maximum effective aperture of the image side of the second lens in the optical axis direction; CTL2 is the thickness of the second lens on the optical axis.

[0010] In this way, when the above relationship is satisfied, the second lens is designed to be ultra-thin at the center, which can effectively balance the optical path difference of the optical lens and realize the function of correcting the field curvature. Therefore, the ratio of the edge thickness of the second lens to the center thickness of the second lens needs to be within a certain ratio range. If the center of the lens is too thin, it will not meet the production and processing requirements and ensure the molding yield. Moreover, if the center of the lens is too thin or too thick, it will make it difficult for the central field of view light and the edge field of view light to converge near the imaging surface, resulting in excessive field curvature. Therefore, the center thickness and edge thickness of the second lens should meet a certain ratio relationship to ensure processability and molding yield, and ensure imaging stability. If the lower limit of the relationship is exceeded, the center of the second lens will be too thick relative to the edge of the second lens, resulting in excessive field curvature of the imaging surface of the optical lens; if the upper limit of the relationship is exceeded, the center of the second lens will be too thin, which will increase the difficulty of production and processing of the second lens, thereby reducing the molding yield of the second lens.

[0011] In some embodiments, the optical lens satisfies the following relationship:

[0012] 0.2 <SIN(FOV) / FNO<0.5;

[0013] Among them, FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens.

[0014] In this way, the optical lens can increase the aperture number of the optical lens while meeting the telephoto characteristic. Compared with general optical lenses, a larger aperture number can meet the requirements of high-definition photography. By satisfying the above formula, the field angle and aperture number of the optical lens can be reasonably matched and can meet the imaging requirements. If the upper limit of the relationship is exceeded, the field angle of the optical lens is too large, resulting in excessive distortion of the off-axis field of view, causing distortion in the periphery of the image, and thus resulting in a decrease in imaging performance; if the lower limit of the relationship is exceeded, the amount of light entering the optical lens increases relatively, causing blurred imaging of the edge field of view, affecting the imaging quality of the optical lens. Therefore, when the above relationship is satisfied, the design requirements of telephoto characteristics and high-quality imaging can be met at the same time.

[0015] In some embodiments, the optical lens satisfies the following relationship:

[0016] -1 <f1 / f2<0;

[0017] Wherein, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.

[0018] In this way, the first lens provides positive refractive power, which is conducive to the collection of light in the object space, and the second lens provides negative refractive power, which can make the collected light diverge, thereby meeting the requirement of large image height. The negative and positive lens combination can not only effectively compress the volume of the optical lens and realize the miniaturization design requirements, but also the negative and positive lens combination can offset the field curvature and other aberrations generated by each other. Therefore, when the above formula is satisfied, the field curvature and other aberrations of the optical lens can be well corrected. In addition, when the above relationship is satisfied, it can ensure that the refractive power of the lens provided is sufficient, and the total length of the optical lens can be reduced, thereby meeting the miniaturization design requirements.

[0019] In some embodiments, the optical lens satisfies the following relationship:

[0020] FNO / TTL<0.5mm -1 ;

[0021] Wherein, FNO is the aperture number of the optical lens.

[0022] Thus, compared with a conventional telephoto lens, the optical lens has a smaller aperture number, so that the optical lens can meet the telephoto characteristics while reducing its volume. When the above relationship is met, the telephoto performance and miniaturization design requirements of the optical lens can be taken into account at the same time, and sufficient light flux is provided for the optical lens to meet the needs of high-quality and high-definition shooting. Therefore, when the above relationship is met, the optical lens can meet the characteristics of the telephoto characteristics and the miniaturization structure at the same time. If the upper limit of the relationship is exceeded, although the miniaturization of the optical lens can be taken into account, the light flux of the optical lens will be insufficient, resulting in a decrease in the clarity of the captured image.

[0023] In some embodiments, the optical lens satisfies the following relationship:

[0024] 3mm <SDL1 / RAD(FOV)<6mm;

[0025] Wherein, SDL1 is the diameter of the maximum effective aperture of the object side of the first lens, and FOV is the maximum field of view angle of the optical lens.

[0026] In this way, when the above relationship is satisfied, the aperture and focal length of the first lens determine the field of view of the optical lens, and the reasonable combination of the two can ensure that a sufficiently large range of light information enters the optical lens and forms an image on the imaging surface of the optical lens. If the upper limit of the relationship is exceeded, the field of view of the optical lens will be too small, and the imaging range of the captured image cannot achieve the shooting effect of a large field of view; if the lower limit of the relationship is exceeded, the aperture of the first lens is too small, and the field of view of the optical lens is too large, which will cause serious imaging distortion of the optical lens, resulting in distortion of the edge field of view of the captured image, and thus reducing the imaging quality.

[0027] In some embodiments, the optical lens satisfies the following relationship:

[0028] 0.9 <Imgh / TTL<1;

[0029] Wherein, Imgh is the image height corresponding to the maximum field angle of the optical lens.

[0030] In this way, when the above relationship is satisfied, the miniaturized design and large image plane characteristics of the optical lens can be taken into account at the same time to meet the requirements of high-definition imaging. If the upper limit of the relationship is exceeded, although the imaging effect of the large image plane can be met, the volume of the optical lens will be over-compressed, resulting in a decrease in image clarity and failure to meet the requirements of high-definition imaging. If the lower limit of the relationship is exceeded, the length of the optical lens will be too long, thereby increasing the assembly space of the optical lens and failing to achieve a miniaturized design.

[0031] In some embodiments, the optical lens satisfies the following relationship:

[0032] FBL / TTL>0.15

[0033] Wherein, FBL is the shortest distance from the image side surface of the seventh lens to the imaging surface of the optical lens in a direction parallel to the optical axis.

[0034] In this way, when the above relationship is satisfied, the optical lens can ensure that the optical lens has a sufficient focusing range while meeting the requirements of miniaturization, thereby improving the assembly yield of the optical lens, and at the same time ensuring that the focal depth of the optical lens is large, and more depth information of the object can be obtained, thereby improving the imaging quality. If the lower limit of the relationship is exceeded, the tolerance of the optical lens is too small during the assembly process, which will increase the difficulty of the production process, resulting in a low production yield, and at the same time, it cannot be guaranteed that the optical lens has a sufficient focal depth, resulting in poor imaging quality.

[0035] In some embodiments, the optical lens satisfies the following relationship:

[0036] 6mm <SDL1*FNO<10mm;

[0037] Wherein, SDL1 is the diameter of the maximum effective aperture of the object side of the first lens; FNO is the aperture number of the optical lens.

[0038] In this way, when the above relationship is satisfied, the ratio of the diameter of the maximum effective aperture of the first lens object side and the aperture number can be reasonably controlled, which can ensure that the optical lens has a better light throughput and picture clarity. When the upper limit of the relationship is exceeded, it is not conducive to the convergence of light on the imaging surface, resulting in a large amount of stray light, which in turn leads to a decrease in shooting quality; when the lower limit of the relationship is exceeded, the maximum effective aperture of the first lens object side is too large, resulting in the failure to reasonably intercept the light of the edge field of view, thereby increasing the field curvature of the optical lens, forming a distorted imaging of the edge field of view, and thus affecting the imaging quality.

[0039] In some embodiments, the optical lens further includes an aperture, and the optical lens satisfies the following relationship:

[0040] 0.2 <SD / Imgh<0.6;

[0041] Wherein, SD is the diameter of the aperture, and Imgh is the image height corresponding to the maximum field angle of the optical lens.

[0042] The aperture size of the optical lens determines the amount of light passing through the optical lens, and the size of the photosensitive surface determines the clarity of the image captured by the optical lens. In this way, when the above relationship is satisfied, the aperture size of the optical lens can be reasonably matched with the size of the photosensitive surface, thereby ensuring sufficient light passing through and ensuring high definition of the captured image. If the upper limit of the relationship is exceeded, the exposure of the optical lens will be too large, the brightness will be too high, and the image quality will be affected; if the lower limit of the relationship is exceeded, the light passing through the optical lens will be insufficient, and when the relative brightness of the light is not enough, the sensitivity of the image will decrease, affecting the clarity of the image.

[0043] In some embodiments, the optical lens satisfies the following relationship:

[0044] 50mm 2 <(R5*R6) / (R5 / R6)<100mm 2 ;

[0045] Wherein, R5 is the curvature radius of the object side surface of the third lens at the optical axis, and R6 is the curvature radius of the image side surface of the third lens at the optical axis.

[0046] In this way, when the above relationship is satisfied, the curvature radius of the object side and image side of the third lens at the optical axis is more appropriate, which can reasonably balance the optical path difference between the edge field light and the paraxial field light of the optical lens, thereby reasonably correcting the field curvature and astigmatism of the optical lens, while reducing the tolerance sensitivity of the optical lens, thereby improving the assembly stability of the optical lens. If the upper limit of the relationship is exceeded, the field curvature of the optical lens will be too large; if the lower limit of the relationship is exceeded, the tolerance sensitivity of the optical lens will increase, resulting in a decrease in production yield.

[0047] The camera module of the embodiment of the present application includes the optical lens and the photosensitive element of any one of the above embodiments, and the photosensitive element is arranged on the image side of the optical lens.

[0048] In the camera module of the embodiment of the present application, the focal length of the optical lens and the total length of the optical lens are reasonably controlled, which can not only realize the miniaturization of the optical lens, but also ensure that the light is better converged on the imaging surface. If the length of the optical lens is too short, the assembly sensitivity of the optical lens will increase, and it will be unfavorable for the convergence of light on the imaging surface; if the length of the optical lens is too long, the main light angle of the light entering the imaging surface will be too large, and the edge field light of the optical lens cannot be imaged on the imaging surface, resulting in incomplete imaging information.

[0049] The electronic device according to the embodiment of the present application includes a housing and the camera module described above, wherein the camera module is installed in the housing.

[0050] In the electronic device of the embodiment of the present application, the focal length of the optical lens and the total length of the optical lens are reasonably controlled, which can not only realize the miniaturization of the optical lens, but also ensure that the light is better converged on the imaging surface. If the length of the optical lens is too short, the assembly sensitivity of the optical lens will increase, and it will be unfavorable for the convergence of light on the imaging surface; if the length of the optical lens is too long, the main light angle of the light entering the imaging surface will be too large, and the edge field light of the optical lens cannot be imaged on the imaging surface, resulting in incomplete imaging information.

[0051] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0053] Figure 1 is a schematic structural diagram of an optical lens according to Embodiment 1 of the present application;

[0054] Figure 2 Graphs showing the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens disclosed in Example 1 of the present application;

[0055] Figure 3 is a schematic structural diagram of an optical lens according to Embodiment 2 of the present application;

[0056] Figure 4 Graphs showing the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens disclosed in Example 2 of the present application;

[0057] Figure 5 is a schematic structural diagram of an optical lens according to Embodiment 3 of the present application;

[0058] Figure 6 It is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve diagram of the optical lens disclosed in Example 3 of the present application;

[0059] Figure 7 is a schematic structural diagram of an optical lens according to a fourth embodiment of the present application;

[0060] Figure 8 Graphs showing the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens disclosed in Example 4 of the present application;

[0061] Fig. 9 is a schematic structural diagram of an optical lens according to a fifth embodiment of the present application;

[0062] Fig.10 Graphs showing the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens disclosed in Example 5 of the present application;

[0063] Fig.11 is a schematic structural diagram of an optical lens according to a sixth embodiment of the present application;

[0064] Fig.12 Graphs showing the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens disclosed in Example 6 of the present application;

[0065] Fig.13 is a schematic structural diagram of an optical lens according to Embodiment 7 of the present application;

[0066] Fig.14 Graphs showing the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens disclosed in Example 7 of the present application;

[0067] Fig.15 is a schematic structural diagram of a camera module according to an embodiment of the present application;

[0068] Fig.16 It is a schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0069] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0070] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0071] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0073] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0074] See also Figure 1 The optical lens 10 of the embodiment of the present application includes, from the object side to the image side, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with refractive power, a fourth lens L4 with negative refractive power, a fifth lens L5 with refractive power, a sixth lens L6 with refractive power, and a seventh lens L7 with refractive power.

[0075] The first lens L1 has an object-side surface S1 and an image-side surface S2, and the object-side surface S1 of the first lens L1 is a convex surface near the optical axis Z. The second lens L2 has an object-side surface S3 and an image-side surface S4, and the object-side surface S3 of the second lens L2 is a convex surface near the optical axis Z, and the image-side surface S4 of the second lens L2 is a concave surface near the optical axis Z. The third lens L3 has an object-side surface S5 and an image-side surface S6, and the object-side surface S5 of the third lens L3 is a convex surface near the optical axis Z, and the image-side surface S6 of the third lens L3 is a concave surface near the optical axis Z. The fourth lens L4 has an object-side surface S7 and an image-side surface S8, and the object-side surface S7 of the fourth lens L4 is a concave surface near the optical axis Z. The fifth lens L5 has an object-side surface S9 and an image-side surface S10, and the object-side surface S9 of the fifth lens L5 is a concave surface near the optical axis Z, and the image-side surface S10 of the fifth lens L5 is a convex surface near the optical axis Z. The sixth lens L6 has an object-side surface S11 and an image-side surface S12 , and the object-side surface S12 of the sixth lens L6 is a concave surface near the optical axis Z. The seventh lens L7 has an object-side surface S13 and an image-side surface S14 , and the image-side surface S14 of the seventh lens L7 is a concave surface near the optical axis Z.

[0076] like Figure 1 As shown, in the embodiment of the present application, the optical lens 10 also includes an aperture. Among them, the aperture can be an aperture or a field of view. The embodiment of the present application is described by taking the aperture as an example. The aperture can be set at any position in the optical lens 10. For example, the aperture can be set on the surface of any lens, or between any two lenses, or between the seventh lens L7 and the infrared cut-off filter L8. The specific position of the aperture can be set according to actual conditions, which is not limited here. The optical lens 10 can better control the amount of light entering by setting the position of the aperture reasonably, thereby improving the imaging effect and improving the imaging quality of the optical lens 10.

[0077] Furthermore, in the embodiments of the present application, through reasonable lens configuration, the focal length of the optical lens and the total length of the optical lens can be reasonably controlled, which not only enables the miniaturization of the optical lens, but also ensures that the light is better converged on the imaging surface, thereby improving the imaging quality of the optical lens and facilitating user use.

[0078] Furthermore, the optical lens 10 satisfies the following relationship:

[0079] 0.9≤TTL / f≤1; ……(1)

[0080] Wherein, TTL is the distance on the optical axis from the object-side surface S1 of the first lens L1 to the imaging surface S17 of the optical lens 10 , and f is the effective focal length of the optical lens 10 .

[0081] That is to say, TTL / f can be any value in the range of (0.8, 1.2). For example, the value can be 0.82, 0.84, 0.86, 0.88, 0.9, 0.92, 0.94, 0.96, 0.98, etc.

[0082] Under the condition that the above relationship (1) is satisfied, the effective focal length of the optical lens 10 and the total length of the optical lens 10 can be reasonably controlled, which can not only realize the miniaturization of the optical lens 10, but also ensure that the light is better converged on the imaging surface S17. If the lower limit of the relationship (1) is exceeded, the length of the optical lens 10 is too short, which will increase the assembly sensitivity of the optical lens 10 and will be unfavorable for the convergence of light on the imaging surface S17. If the upper limit of the relationship (1) is exceeded, the length of the optical lens 10 is too long, which will cause the main light angle of the light entering the imaging surface S17 to be too large, and the edge field light of the optical lens 10 cannot be imaged on the imaging surface S17, resulting in incomplete imaging information and reduced imaging quality.

[0083] In some embodiments, the optical lens 10 satisfies the following relationship:

[0084] 1 <ETL2 / CTL2≤1.6;……(2)

[0085] Wherein, ETL2 is the distance from the maximum effective aperture of the object-side surface S3 of the second lens L2 to the maximum effective aperture of the image-side surface S4 of the second lens L2 in the optical axis Z direction; CTL2 is the thickness of the second lens L2 on the optical axis Z.

[0086] That is to say, ETL2 / CTL2 can be any value in the interval (1, 2), for example, the value can be 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, etc.

[0087] In this way, when the above relationship (2) is satisfied, the second lens L2 is designed to be ultra-thin at the center, which can effectively balance the optical path difference of the optical lens 10 and realize the function of correcting the field curvature. Therefore, the ratio of the edge thickness of the second lens L2 to the center thickness of the second lens L2 needs to be within a certain ratio range. If the center of the lens is too thin, it will not meet the production and processing requirements and ensure the molding yield. Moreover, if the center of the lens is too thin or too thick, it will make it difficult for the central field of view light and the edge field of view light to converge near the imaging surface S17, resulting in excessive field curvature. Therefore, the center thickness and edge thickness of the second lens L2 should meet a certain ratio relationship to ensure processability and molding yield, and ensure imaging stability. If the lower limit of the relationship (2) is exceeded, the center of the second lens L2 will be too thick relative to the edge of the second lens L2, resulting in excessive field curvature of the imaging surface S17 of the optical lens 10; if the upper limit of the relationship (2) is exceeded, the center of the second lens L2 will be too thin, which will increase the difficulty of production and processing of the second lens L2, thereby reducing the molding yield of the second lens L2.

[0088] In some embodiments, the optical lens 10 satisfies the following relationship:

[0089] 0.2 <SIN(FOV) / FNO<0.5;……(3)

[0090] Among them, FOV is the maximum field of view of the optical lens 10, and FNO is the aperture number of the optical lens 10.

[0091] That is to say, SIN(FOV) / FNO can be any value in the interval of (0.2, 0.5), for example, the value can be 0.23, 0.06, 0.29, 0.31, 0.34, 0.37, 0.4, 0.43, 0.46, 0.49, etc.

[0092] In this way, the optical lens 10 increases the aperture number of the optical lens 10 while meeting the telephoto characteristic. Compared with general optical lenses, a larger aperture number can meet the requirements of high-definition photography. By meeting the above (3), the field angle of the optical lens 10 and the aperture number can be reasonably matched and can meet the imaging requirements. If the upper limit of the relationship (3) is exceeded, the field angle of the optical lens 10 is too large, resulting in excessive distortion of the off-axis field of view, causing distortion in the periphery of the image, and thus resulting in a decrease in imaging performance; if the lower limit of the relationship (3) is exceeded, the amount of light entering the optical lens 10 is relatively increased, which will cause blurring of the edge field of view imaging, affecting the imaging quality of the optical lens 10. Therefore, when the above relationship (3) is met, the design requirements of both the telephoto characteristic and high-quality imaging can be met at the same time.

[0093] In some embodiments, the optical lens 10 satisfies the following relationship:

[0094] -1 <f1 / f2<0;……(4)

[0095] Wherein, f1 is the effective focal length of the first lens L1, and f2 is the effective focal length of the second lens L2.

[0096] That is to say, f1 / f2 can be any value in the interval (-1, 0), for example, the value can be -0.9, -0.8, -0.7, -0.6, -0.5, -0.4, -0.3, -0.2, -0.1, etc.

[0097] Thus, when the above relationship (4) is satisfied, the first lens L1 provides a positive refractive power, which is beneficial to the light collection in the object space, and the second lens L2 provides a negative refractive power, which can make the collected light diverge, thereby meeting the requirement of large image height. The negative-positive lens combination can not only effectively compress the volume of the optical lens 10 and realize the miniaturized design requirement, but also the negative-positive lens combination can offset the field curvature and other aberrations generated by each other. Therefore, when the above relationship (4) is satisfied, the field curvature and other aberrations of the optical lens 10 can be well corrected. In addition, when the above relationship (4) is satisfied, it can be ensured that the refractive power of the lens provided is sufficient, and the total length of the optical lens 10 can be reduced, thereby meeting the miniaturized design requirement.

[0098] In some embodiments, the optical lens 10 satisfies the following relationship:

[0099] FNO / TTL<0.5mm -1 ; ……(5)

[0100] Here, FNO is the aperture number of the optical lens 10 .

[0101] That is to say, FNO / TTL can be any value less than 0.5, in mm -1 For example, the value may be 0.45, 0.4, 0.35, 0.3, 0.25, 0.2, 0.15, 0.1, 0.05, etc.

[0102] Thus, when the above relationship (5) is satisfied, the optical lens 10 of the embodiment of the present application has a smaller aperture number compared to the traditional telephoto lens, so that the optical lens 10 can meet the telephoto characteristics while reducing the volume. It can take into account both the telephoto performance and the miniaturized design requirements of the optical lens 10, and provide sufficient light flux for the optical lens 10 to meet the needs of high-quality and high-definition shooting. Therefore, when the above relationship (5) is satisfied, the optical lens 10 can simultaneously meet the characteristics of the telephoto characteristics and the miniaturized structure; if the upper limit of the relationship (5) is exceeded, although the miniaturization of the optical lens 10 can be taken into account, it will also cause the light flux of the optical lens 10 to be insufficient, resulting in a decrease in the clarity of the captured image.

[0103] In some embodiments, the optical lens 10 satisfies the following relationship:

[0104] 3mm <SDL1 / RAD(FOV)<6mm;……(6)

[0105] Wherein, SDL1 is the diameter of the maximum effective aperture of the object side S1 of the first lens L1 , and FOV is the maximum field of view of the optical lens 10 .

[0106] That is to say, SDL1 / RAD(FOV) can be any value in the interval (3, 6), in mm. For example, the value can be 3.2, 3.4, 3.6, 3.8, 4, 4.2, 4.4, 4.6, 4.8, 5, 5.2, 5.4, 5.6, 5.8, etc.

[0107] Thus, when the above relationship (6) is satisfied, the aperture and focal length of the first lens L1 determine the size of the field of view of the optical lens 10, and the reasonable combination of the two can ensure that a sufficiently large range of light information enters the optical lens 10 and forms an image on the imaging surface S17 of the optical lens 10. If the upper limit of the relationship (6) is exceeded, the field of view of the optical lens 10 will be too small, and the imaging range of the captured image cannot achieve the shooting effect of a large field of view; if the lower limit of the relationship (6) is exceeded, the aperture of the first lens S1 is too small, and the field of view of the optical lens 10 is too large, which will cause serious imaging distortion of the optical lens 10, resulting in distortion of the edge field of view of the captured image, thereby reducing the imaging quality.

[0108] In some embodiments, the optical lens 10 satisfies the following relationship:

[0109] 0.9 <Imgh / TTL<1;……(7)

[0110] Wherein, Imgh is the image height corresponding to the maximum field angle of the optical lens 10.

[0111] That is to say, Imgh / TTL can be any value in the interval (0.9, 1), for example, the value can be 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, etc.

[0112] In this way, when the above-mentioned relationship (7) is satisfied, the miniaturized design and large image plane characteristics of the optical lens 10 can be taken into account at the same time to meet the high-definition imaging. If the upper limit of the relationship (7) is exceeded, although the imaging effect of the large image plane can be met, the volume of the optical lens 10 will be over-compressed, thereby causing the image clarity to decrease and failing to meet the high-definition imaging effect. If the lower limit of the relationship (7) is exceeded, the length of the optical lens 10 will be too long, thereby increasing the assembly space of the optical lens 10 and failing to achieve a miniaturized design.

[0113] In some embodiments, the optical lens 10 satisfies the following relationship:

[0114] FBL / TTL>0.15; ……(8)

[0115] Wherein, FBL is the shortest distance from the image side surface S14 of the seventh lens L7 to the imaging surface S17 of the optical lens 10 in the direction parallel to the optical axis Z.

[0116] That is to say, FBL / TTL can be any value greater than 0.15, for example, the value can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, etc.

[0117] In this way, when the above relationship (8) is satisfied, the optical lens 10 can ensure that the optical lens 10 has a sufficient focusing range while meeting the requirements of miniaturization, thereby improving the assembly yield of the optical lens 10, and at the same time ensuring that the focal depth of the optical lens 10 is large, and more depth information of the object can be obtained, thereby improving the imaging quality. If the lower limit of the relationship (8) is exceeded, the tolerance of the optical lens 10 during the assembly process is too small, which will increase the difficulty of the production process, resulting in a low production yield, and at the same time, it cannot be ensured that the optical lens 10 has a sufficient focal depth, resulting in poor imaging quality.

[0118] In some embodiments, the optical lens 10 satisfies the following relationship:

[0119] 6mm <SDL1*FNO<10mm;……(9)

[0120] Wherein, SDL1 is the diameter of the maximum effective aperture of the object side S1 of the first lens L1; and FNO is the aperture number of the optical lens 10.

[0121] That is to say, SDL1*FNO can be any value in the interval (6, 10), in units of mm. For example, the value can be 6.3, 6.6, 6.9, 7.1, 7.4, 7.7, 8, 8.3, 8.6, 8.9, etc.

[0122] In this way, when the above relationship (9) is satisfied, the ratio of the diameter of the maximum effective aperture of the object side S1 of the first lens L1 to the aperture number can be reasonably controlled, which can ensure that the optical lens 10 has a better light throughput and image clarity. When the upper limit of the relationship (9) is exceeded, it is not conducive to the convergence of light on the imaging surface S17, thereby causing a large amount of stray light to be generated, and then causing the shooting quality to deteriorate; when the lower limit of the relationship (9) is exceeded, the maximum effective aperture of the object side of the first lens is too large, resulting in the failure to reasonably intercept the light of the edge field of view, thereby increasing the field curvature of the optical lens 10, forming a distorted imaging of the edge field of view, and then affecting the imaging quality.

[0123] In some embodiments, the optical lens 10 further includes an aperture, and the optical lens 10 satisfies the following relationship:

[0124] 0.2 <SD / Imgh<0.6;……(10)

[0125] Wherein, SD is the diameter of the aperture, and Imgh is the image height corresponding to the maximum field angle of the optical lens 10.

[0126] That is to say, SD / Imgh can be any value in the interval of (0.2, 0.6), for example, the value can be 0.22, 0.24, 0.26, 0.28, 0.3, 0.32, 0.34, 0.36, 0.38, 0.4, 0.42, 0.46, 0.48, 0.5, 0.52, 0.54, 0.58, etc.

[0127] The size of the aperture of the optical lens 10 determines the amount of light passing through the optical lens 10, and the size of the photosensitive surface determines the image clarity of the optical lens 10. In this way, when the above relationship (10) is satisfied, the aperture of the optical lens 10 can be reasonably matched with the size of the photosensitive surface, so as to ensure sufficient light passing and high definition of the captured image. If the upper limit of the relationship (10) is exceeded, the exposure of the optical lens 10 will be too large, the brightness will be too high, and the image quality will be affected; if the lower limit of the relationship (10) is exceeded, the light passing through the optical lens 10 will be insufficient. When the relative brightness of the light is not enough, the sensitivity of the image will decrease, affecting the clarity of the image.

[0128] In some embodiments, the optical lens 10 satisfies the following relationship:

[0129] 50mm 2 <(R5*R6) / (R5 / R6)<100mm 2 ; ……(11)

[0130] Wherein, R5 is the curvature radius of the object-side surface S5 of the third lens L3 at the optical axis Z, and R6 is the curvature radius of the image-side surface S6 of the third lens L3 at the optical axis Z.

[0131] That is to say, (R5*R6) / (R5 / R6) can be any value in the range of (50, 100), in mm. 2 For example, the value can be 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, etc.

[0132] Thus, when the above relationship (11) is satisfied, the curvature radius of the object side surface S5 and the image side surface S6 of the third lens L3 at the optical axis Z is more appropriate, and the optical path difference between the edge field light and the paraxial field light of the optical lens 10 can be reasonably balanced, so that the field curvature and astigmatism of the optical lens 10 can be reasonably corrected, and the tolerance sensitivity of the optical lens 10 can be reduced, thereby improving the assembly stability of the optical lens 10. If the upper limit of the relationship (11) is exceeded, the field curvature of the optical lens 10 will be too large; if the lower limit of the relationship (11) is exceeded, the tolerance sensitivity of the optical lens 10 will increase, resulting in a decrease in the production yield.

[0133] In some embodiments, the optical lens 10 further includes an infrared cut-off filter L8, and the infrared cut-off filter has an object side surface S15 and an image side surface S16. In some embodiments, the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are all made of plastic. In other embodiments, the material of the lenses can all be glass; or some lenses can be made of glass and some lenses can be made of plastic, for example, the first lens is glass and the remaining lenses are plastic. The specific setting can be based on the actual situation and is not limited here. The infrared cut-off filter L8 is also made of glass. Of course, in other embodiments, the infrared cut-off filter L8 can also be made of other materials. The specific setting can be based on the actual situation and is not limited here.

[0134] In some embodiments, the object side and image side of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the infrared cut-off filter L8 are all aspherical. In other embodiments, the lens surfaces can all be spherical, or some lens surfaces are spherical and some lens surfaces are aspherical. In this way, the optical lens 10 can effectively reduce the total length of the optical lens 10 by adjusting the curvature radius and aspherical coefficient of each lens surface, and can effectively correct aberrations and improve imaging quality.

[0135] The shape of an aspheric surface can be determined by, but is not limited to, the following formula:

[0136]

[0137] Among them, Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex in the direction parallel to the optical axis, r is the vertical distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula.

[0138] Embodiment 1:

[0139] See also Figure 1 and Figure 2 In Embodiment 1, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has negative refractive power, the fifth lens L5 has negative refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has negative refractive power.

[0140] The object-side surface S1 of the first lens L1 is convex near the optical axis Z, and the image-side surface S2 is concave near the optical axis Z. The object-side surface S3 of the second lens L2 is convex near the optical axis Z, and the image-side surface S4 is concave near the optical axis Z. The object-side surface S5 of the third lens L3 is convex near the optical axis Z, and the image-side surface S6 is concave near the optical axis Z. The object-side surface S7 of the fourth lens L4 is concave near the optical axis Z, and the image-side surface S8 is convex near the optical axis Z. The object-side surface S9 of the fifth lens L5 is concave near the optical axis Z, and the image-side surface S10 is convex near the optical axis Z. The object-side surface S11 of the sixth lens L6 is concave near the optical axis Z, and the image-side surface S12 is convex near the optical axis Z. The object-side surface S13 of the seventh lens L7 is convex near the optical axis Z, and the image-side surface S14 is concave near the optical axis Z.

[0141] Table 1 is a characteristic table of the optical lens 10 of the first embodiment, wherein the data of focal length, material refractive index and Abbe number are obtained with reference to visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness and focal length are all millimeters (mm).

[0142] Table 1:

[0143]

[0144]

[0145] In Table 1, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; and TTL is the distance on the optical axis Z from the object side surface S1 of the first lens L1 to the imaging surface S17 of the optical lens 10.

[0146] The following Table 2 lists the cone coefficient K and the high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspheric surfaces (S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14) of each lens of the optical lens 10 of Example 1, and these coefficients are obtained by the above-mentioned aspheric surface formula (12).

[0147] Table 2:

[0148]

[0149]

[0150] Figure 2 A to Figure 2 C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the first embodiment.

[0151] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 2 When the wavelengths given in A are 650.0nm, 610.0nm, 587.6nm, 510.0nm, and 470.0nm, respectively, the focus shifts of different fields of view are all within ±0.10mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0152] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height. Figure 2 The astigmatism curve given in B shows that when the wavelength is 587.6nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.02mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0153] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height. Figure 2 The distortion curve given in C shows that the distortion is within 2.5% at a wavelength of 587.6 nm, indicating that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0154] Embodiment 2:

[0155] See also Figure 3 and Figure 4 In embodiment 2, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has negative refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has negative refractive power.

[0156] The object-side surface S1 of the first lens L1 is a convex surface near the optical axis Z, and the image-side surface S2 is a convex surface near the optical axis Z. The object-side surface S3 of the second lens L2 is a convex surface near the optical axis Z, and the image-side surface S4 is a concave surface near the optical axis Z. The object-side surface S5 of the third lens L3 is a convex surface near the optical axis Z, and the image-side surface S6 is a concave surface near the optical axis Z. The object-side surface S7 of the fourth lens L4 is a concave surface near the optical axis Z, and the image-side surface S8 is a convex surface near the optical axis Z. The object-side surface S9 of the fifth lens L5 is a concave surface near the optical axis Z, and the image-side surface S10 is a convex surface near the optical axis Z. The object-side surface S11 of the sixth lens L6 is a concave surface near the optical axis Z, and the image-side surface S12 is a convex surface near the optical axis Z. The object-side surface S13 of the seventh lens L7 is a convex surface near the optical axis Z, and the image-side surface S14 is a concave surface near the optical axis Z.

[0157] Table 3 is a characteristic table of the optical lens 10 of the second embodiment, wherein the data of focal length, material refractive index and Abbe number are obtained with reference to visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness and focal length are all millimeters (mm).

[0158] Table 3:

[0159]

[0160]

[0161] In Table 3, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; and TTL is the distance on the optical axis Z from the object side surface S1 of the first lens L1 to the imaging surface S17 of the optical lens 10.

[0162] Table 4 below lists the cone coefficient K and the high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspheric surfaces (S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14) of each lens of the optical lens 10 of Example 2, and these coefficients are obtained by the above-mentioned aspheric surface formula (12).

[0163] Table 4:

[0164]

[0165]

[0166] Figure 4 A to Figure 4 C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the second embodiment.

[0167] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 4 When the wavelengths given in A are 650.0nm, 610.0nm, 587.6nm, 510.0nm, and 470.0nm, respectively, the focus shifts of different fields of view are all within ±0.08mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0168] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height. Figure 4 The astigmatism curve given in B shows that when the wavelength is 587.6nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.02mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0169] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height. Figure 4 The distortion curve given in C shows that the distortion is within 2.5% at a wavelength of 587.6 nm, indicating that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0170] Embodiment three:

[0171] See also Figure 5 and Figure 6 In embodiment 3, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has negative refractive power, the fifth lens L5 has negative refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has positive refractive power.

[0172] The object-side surface S1 of the first lens L1 is convex near the optical axis Z, and the image-side surface S2 is concave near the optical axis Z. The object-side surface S3 of the second lens L2 is convex near the optical axis Z, and the image-side surface S4 is concave near the optical axis Z. The object-side surface S5 of the third lens L3 is convex near the optical axis Z, and the image-side surface S6 is concave near the optical axis Z. The object-side surface S7 of the fourth lens L4 is concave near the optical axis Z, and the image-side surface S8 is concave near the optical axis Z. The object-side surface S9 of the fifth lens L5 is concave near the optical axis Z, and the image-side surface S10 is convex near the optical axis Z. The object-side surface S11 of the sixth lens L6 is concave near the optical axis Z, and the image-side surface S12 is concave near the optical axis Z. The object-side surface S13 of the seventh lens L7 is convex near the optical axis Z, and the image-side surface S14 is concave near the optical axis Z.

[0173] Table 5 is a characteristic table of the optical lens 10 of the third embodiment, wherein the data of focal length, material refractive index and Abbe number are obtained with reference to visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness and focal length are all millimeters (mm).

[0174] Table 5:

[0175]

[0176] In Table 5, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; and TTL is the distance on the optical axis Z from the object side surface S1 of the first lens L1 to the imaging surface S17 of the optical lens 10.

[0177] The following Table 6 lists the cone coefficient K and the high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspheric surfaces (S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14) of each lens of the optical lens 10 of Example 3, and these coefficients are obtained by the above-mentioned aspheric surface formula (12).

[0178] Table 6:

[0179]

[0180]

[0181] Figure 6 A to Figure 6 C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the third embodiment.

[0182] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 6 When the wavelengths given in A are 650.0nm, 610.0nm, 587.6nm, 510.0nm, and 470.0nm, respectively, the focus shifts of different fields of view are all within ±0.05mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0183] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height. Figure 6 The astigmatism curve given in B shows that when the wavelength is 587.6nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.05mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0184] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height. Figure 6 The distortion curve given in C shows that the distortion is within 2.5% at a wavelength of 587.6 nm, indicating that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0185] Embodiment 4:

[0186] See also Figure 7 and Figure 8 In embodiment 4, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has negative refractive power, the fourth lens L4 has negative refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has negative refractive power.

[0187] The object-side surface S1 of the first lens L1 is a convex surface near the optical axis Z, and the image-side surface S2 is a convex surface near the optical axis Z. The object-side surface S3 of the second lens L2 is a convex surface near the optical axis Z, and the image-side surface S4 is a concave surface near the optical axis Z. The object-side surface S5 of the third lens L3 is a convex surface near the optical axis Z, and the image-side surface S6 is a concave surface near the optical axis Z. The object-side surface S7 of the fourth lens L4 is a concave surface near the optical axis Z, and the image-side surface S8 is a concave surface near the optical axis Z. The object-side surface S9 of the fifth lens L5 is a concave surface near the optical axis Z, and the image-side surface S10 is a convex surface near the optical axis Z. The object-side surface S11 of the sixth lens L6 is a concave surface near the optical axis Z, and the image-side surface S12 is a convex surface near the optical axis Z. The object-side surface S13 of the seventh lens L7 is a convex surface near the optical axis Z, and the image-side surface S14 is a concave surface near the optical axis Z.

[0188] Table 7 is a characteristic table of the optical lens 10 of the fourth embodiment, wherein the data of focal length, material refractive index and Abbe number are obtained with reference to visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness and focal length are all millimeters (mm).

[0189] Table 7:

[0190]

[0191] In Table 7, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; and TTL is the distance on the optical axis Z from the object side surface S1 of the first lens L1 to the imaging surface S17 of the optical lens 10.

[0192] The following Table 8 lists the cone coefficient K and the high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspheric surfaces (S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14) of each lens of the optical lens 10 of Example 4, and these coefficients are obtained by the above-mentioned aspheric surface formula (12).

[0193] Table 8:

[0194] Surface number K A4 A6 A8 A10 S1 -7.517E-02 -1.160E-03 1.600E-04 -4.400E-04 -1.500E-04 S2 -9.545E+01 3.677E-02 -5.981E-02 5.686E-02 -2.667E-02 S3 9.900E+01 2.955E-02 -1.846E-02 -3.826E-02 1.007E-01 S4 -1.535E+00 -1.369E-02 1.333E-01 -3.787E-01 5.614E-01 S5 4.629E+01 -3.440E-03 1.204E-01 -3.722E-01 5.568E-01 S6 7.137E+01 5.929E-02 -1.160E-01 3.312E-01 -8.755E-01 S7 -3.160E+01 8.109E-02 -1.572E-01 1.009E-01 -1.180E-01 S8 9.900E+01 4.474E-02 -1.386E-01 1.224E-01 -2.508E-01 S9 1.907E+01 -1.689E-01 8.510E-03 1.451E-01 -3.866E-01 S10 1.491E+01 -1.270E-01 6.347E-02 5.246E-02 -1.017E-01 S11 4.759E+00 -6.484E-02 -5.126E-02 1.696E-01 -2.339E-01 S12 9.917E+00 -6.426E-02 3.157E-02 2.300E-04 -3.233E-02 S13 9.289E+01 -1.008E-01 8.522E-02 -6.171E-02 1.797E-02 S14 2.102E+01 -8.881E-02 3.823E-02 -1.834E-02 4.790E-03 Surface number A12 A14 A16 A18 A20 S1 8.000E-05 -6.000E-05 -1.000E-05 0.000E+00 0.000E+00 S2 5.280E-03 1.000E-05 -1.000E-04 0.000E+00 0.000E+00 S3 -7.819E-02 2.733E-02 -3.700E-03 0.000E+00 0.000E+00 S4 -4.294E-01 1.761E-01 -3.166E-02 0.000E+00 0.000E+00 S5 -4.293E-01 1.750E-01 -2.906E-02 0.000E+00 0.000E+00 S6 1.250E+00 -9.039E-01 2.655E-01 0.000E+00 0.000E+00 S7 1.061E-01 -4.332E-02 7.250E-03 0.000E+00 0.000E+00 S8 3.080E-01 -2.168E-01 6.296E-02 0.000E+00 0.000E+00 S9 5.522E-01 -4.371E-01 1.381E-01 0.000E+00 0.000E+00 S10 1.370E-01 -8.542E-02 1.946E-02 0.000E+00 0.000E+00 S11 1.768E-01 -7.024E-02 1.113E-02 0.000E+00 0.000E+00 S12 2.533E-02 -7.930E-03 9.100E-04 0.000E+00 0.000E+00 S13 -6.000E-04 -5.500E-04 7.000E-05 0.000E+00 0.000E+00 S14 -6.900E-04 7.000E-05 0.000E+00 0.000E+00 0.000E+00

[0195] Figure 8 A to Figure 8C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the fourth embodiment.

[0196] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 8 When the wavelengths given in A are 650.0nm, 610.0nm, 587.6nm, 510.0nm, and 470.0nm, respectively, the focus shifts of different fields of view are all within ±0.2mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0197] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height. Figure 8 The astigmatism curve given in B shows that when the wavelength is 587.6nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.01mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0198] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height. Figure 8 The distortion curve given in C shows that the distortion is within 2% when the wavelength is 587.6 nm, which means that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0199] Embodiment five:

[0200] See also Fig. 9 and Fig.10 In Example 5, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has negative refractive power, the fifth lens L5 has negative refractive power, the sixth lens L6 has positive refractive power, and the seventh lens L7 has negative refractive power.

[0201] The object-side surface S1 of the first lens L1 is a convex surface near the optical axis Z, and the image-side surface S2 is a convex surface near the optical axis Z. The object-side surface S3 of the second lens L2 is a convex surface near the optical axis Z, and the image-side surface S4 is a concave surface near the optical axis Z. The object-side surface S5 of the third lens L3 is a convex surface near the optical axis Z, and the image-side surface S6 is a concave surface near the optical axis Z. The object-side surface S7 of the fourth lens L4 is a concave surface near the optical axis Z, and the image-side surface S8 is a convex surface near the optical axis Z. The object-side surface S9 of the fifth lens L5 is a concave surface near the optical axis Z, and the image-side surface S10 is a convex surface near the optical axis Z. The object-side surface S11 of the sixth lens L6 is a concave surface near the optical axis Z, and the image-side surface S12 is a convex surface near the optical axis Z. The object-side surface S13 of the seventh lens L7 is a concave surface near the optical axis Z, and the image-side surface S14 is a concave surface near the optical axis Z.

[0202] Table 9 is a characteristic table of the optical lens 10 of the fifth embodiment, wherein the data of focal length, material refractive index and Abbe number are obtained with reference to visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness and focal length are all millimeters (mm).

[0203] Table 9:

[0204]

[0205] In Table 9, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; and TTL is the distance on the optical axis Z from the object side surface S1 of the first lens L1 to the imaging surface S17 of the optical lens 10.

[0206] Table 10 below lists the cone coefficient K and the high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspheric surfaces (S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14) of each lens of the optical lens 10 of Example 5, and these coefficients are obtained by the surface shape formula (12) of the above-mentioned aspheric surface.

[0207] Table 10:

[0208] Surface number K A4 A6 A8 A10 S1 -8.077E-02 -9.000E-04 1.800E-04 -1.420E-03 1.150E-03 S2 9.900E+01 4.641E-02 -8.387E-02 8.800E-02 -4.651E-02 S3 3.895E+01 2.831E-02 -1.484E-02 -4.620E-02 1.159E-01 S4 -7.380E-02 -1.324E-02 1.111E-01 -3.008E-01 4.254E-01 S5 1.126E+01 -2.100E-04 7.231E-02 -3.282E-01 4.817E-01 S6 7.258E+01 6.977E-02 2.760E-03 -3.892E-01 6.237E-01 S7 -2.154E+01 9.829E-02 -1.361E-01 -1.451E-01 3.130E-01 S8 -9.900E+01 5.422E-02 -8.431E-02 -1.296E-01 2.265E-01 S9 1.075E+01 -1.684E-01 2.198E-01 -4.869E-01 8.947E-01 S10 1.380E+01 -1.876E-01 2.363E-01 -2.962E-01 3.982E-01 S11 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S12 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S13 -9.900E+01 -1.904E-01 3.239E-01 -3.174E-01 1.666E-01 S14 1.896E+01 -1.225E-01 5.850E-02 -2.564E-02 3.180E-03 Surface number A12 A14 A16 A18 A20 S1 -7.400E-04 2.000E-04 -5.000E-05 0.000E+00 0.000E+00 S2 1.090E-02 -4.100E-04 -1.600E-04 0.000E+00 0.000E+00 S3 -9.095E-02 3.172E-02 -4.190E-03 0.000E+00 0.000E+00 S4 -3.007E-01 1.149E-01 -1.975E-02 0.000E+00 0.000E+00 S5 -3.192E-01 1.049E-01 -1.305E-02 0.000E+00 0.000E+00 S6 -4.242E-01 1.222E-01 -3.880E-03 0.000E+00 0.000E+00 S7 -2.686E-01 1.429E-01 -3.887E-02 0.000E+00 0.000E+00 S8 -1.929E-01 8.716E-02 -1.565E-02 0.000E+00 0.000E+00 S9 -1.102E+00 7.000E-01 -1.675E-01 0.000E+00 0.000E+00 S10 -3.670E-01 1.874E-01 -3.804E-02 0.000E+00 0.000E+00 S11 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S12 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S13 -4.824E-02 7.280E-03 -4.400E-04 0.000E+00 0.000E+00 S14 1.560E-03 -5.700E-04 5.000E-05 0.000E+00 0.000E+00

[0209] Fig.10 A to Fig.10 C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the fifth embodiment.

[0210] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Fig.10 When the wavelengths given in A are 650.0nm, 610.0nm, 587.6nm, 510.0nm, and 470.0nm, respectively, the focus shifts of different fields of view are all within ±0.08mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0211] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height. Fig.10 The astigmatism curve given in B shows that when the wavelength is 587.6nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.02mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0212] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height. Fig.10The distortion curve given in C shows that the distortion is within 2% when the wavelength is 587.6 nm, which means that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0213] Embodiment six:

[0214] See also Fig.11 and Fig.12 In Example 6, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has negative refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has negative refractive power.

[0215] The object-side surface S1 of the first lens L1 is convex near the optical axis Z, and the image-side surface S2 is concave near the optical axis Z. The object-side surface S3 of the second lens L2 is convex near the optical axis Z, and the image-side surface S4 is concave near the optical axis Z. The object-side surface S5 of the third lens L3 is convex near the optical axis Z, and the image-side surface S6 is concave near the optical axis Z. The object-side surface S7 of the fourth lens L4 is concave near the optical axis Z, and the image-side surface S8 is convex near the optical axis Z. The object-side surface S9 of the fifth lens L5 is concave near the optical axis Z, and the image-side surface S10 is convex near the optical axis Z. The object-side surface S11 of the sixth lens L6 is concave near the optical axis Z, and the image-side surface S12 is convex near the optical axis Z. The object-side surface S13 of the seventh lens L7 is convex near the optical axis Z, and the image-side surface S14 is concave near the optical axis Z.

[0216] Table 11 is a characteristic table of the optical lens 10 of the sixth embodiment, wherein the data of focal length, material refractive index and Abbe number are obtained with reference to visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness and focal length are all millimeters (mm).

[0217] Table 11:

[0218]

[0219]

[0220] In Table 11, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; and TTL is the distance on the optical axis Z from the object side surface S1 of the first lens L1 to the imaging surface S17 of the optical lens 10.

[0221] Table 12 below lists the cone coefficient K and high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspheric surfaces (S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14) of each lens of the optical lens 10 of Example 6, and these coefficients are obtained by the surface shape formula (12) of the above-mentioned aspheric surface.

[0222] Table 12:

[0223]

[0224]

[0225] Fig.12 A to Fig.12 C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the sixth embodiment.

[0226] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Fig.12 When the wavelengths given in A are 650.0nm, 610.0nm, 587.6nm, 510.0nm, and 470.0nm, respectively, the focus shifts of different fields of view are all within ±0.05mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0227] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height. Fig.12 The astigmatism curve given in B shows that when the wavelength is 587.6nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.02mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0228] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height. Fig.12 The distortion curve given in C shows that the distortion is within 2% when the wavelength is 587.6 nm, which means that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0229] Embodiment seven:

[0230] See also Fig.13 and Fig.14 In Example 7, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has negative refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has negative refractive power.

[0231] The object-side surface S1 of the first lens L1 is convex near the optical axis Z, and the image-side surface S2 is concave near the optical axis Z. The object-side surface S3 of the second lens L2 is convex near the optical axis Z, and the image-side surface S4 is concave near the optical axis Z. The object-side surface S5 of the third lens L3 is convex near the optical axis Z, and the image-side surface S6 is concave near the optical axis Z. The object-side surface S7 of the fourth lens L4 is concave near the optical axis Z, and the image-side surface S8 is concave near the optical axis Z. The object-side surface S9 of the fifth lens L5 is concave near the optical axis Z, and the image-side surface S10 is convex near the optical axis Z. The object-side surface S11 of the sixth lens L6 is concave near the optical axis Z, and the image-side surface S12 is convex near the optical axis Z. The object-side surface S13 of the seventh lens L7 is convex near the optical axis Z, and the image-side surface S14 is concave near the optical axis Z.

[0232] Table 13 is a characteristic table of the optical lens 10 of the seventh embodiment, wherein the data of focal length, material refractive index and Abbe number are obtained with reference to visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness and focal length are all millimeters (mm).

[0233] Table 13:

[0234]

[0235]

[0236] In Table 13, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; and TTL is the distance on the optical axis Z from the object side surface S1 of the first lens L1 to the imaging surface S17 of the optical lens 10.

[0237] Table 14 below lists the cone coefficient K and the high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspheric surfaces (S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14) of each lens of the optical lens 10 of Example 7, and these coefficients are obtained by the surface shape formula (12) of the above-mentioned aspheric surface.

[0238] Table 14:

[0239]

[0240]

[0241] Fig.14 A to Fig.14 C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the seventh embodiment.

[0242] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Fig.14 When the wavelengths given in A are 650.0nm, 610.0nm, 587.6nm, 510.0nm, and 470.0nm, respectively, the focus shifts of different fields of view are all within ±0.01mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0243] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height. Fig.14 The astigmatism curve given in B shows that when the wavelength is 587.6nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.025mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0244] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height. Fig.14 The distortion curve given in C shows that the distortion is within 1% when the wavelength is 587.6 nm, which means that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0245] For the above relationship formulas (1)-(11), the values ​​in Examples 1 to 7 are shown in Table 15 below.

[0246] Table 15:

[0247]

[0248]

[0249] See also Fig.15 The camera module 100 of the embodiment of the present application includes an optical lens 10 and a photosensitive element 20. The photosensitive element 20 is arranged on the image side of the optical lens 10.

[0250] The photosensitive element 20 may be a complementary metal oxide semiconductor (CMOS) photosensitive element 20 or a charge-coupled device (CCD) photosensitive element 20 .

[0251] In the camera module 100 of the embodiment of the present application, by reasonably controlling the focal length of the optical lens 10 and the total length of the optical lens 10, not only can the optical lens 10 be miniaturized, but also the light can be better converged on the imaging surface S17. If the length of the optical lens 10 is too short, the assembly sensitivity of the optical lens 10 will be increased, and it will be unfavorable for the convergence of light on the imaging surface S17; if the length of the optical lens 10 is too long, the main light angle of the light entering the imaging surface S17 will be too large, and the edge field light of the optical lens 10 cannot be imaged on the imaging surface S17, resulting in incomplete imaging information.

[0252] See also Fig.16 The electronic device 1000 of the embodiment of the present application includes a housing 200 and a camera module 100. The camera module 100 is installed in the housing 200. The electronic device 1000 of the embodiment of the present application includes but is not limited to information terminal devices such as smart phones, mobile phones, personal digital assistants (PDAs), game consoles, personal computers (PCs), cameras, smart watches, tablet computers, monitoring equipment, or home appliances with camera functions.

[0253] In the electronic device 1000 of the embodiment of the present application, the focal length of the optical lens 10 and the total length of the optical lens 10 are reasonably controlled, which can not only realize the miniaturization of the optical lens 10, but also ensure that the light is better converged on the imaging surface S17. If the length of the optical lens 10 is too short, the assembly sensitivity of the optical lens 10 will increase, and it will be unfavorable for the convergence of light on the imaging surface S17; if the length of the optical lens 10 is too long, the main angle of the light entering the imaging surface S17 will be too large, and the edge field light of the optical lens 10 cannot be imaged on the imaging surface S17, resulting in incomplete imaging information.

[0254] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0255] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An optical lens, characterized in that: The number of lenses with refractive power is seven, and the optical lens includes, from the object side to the image side: A first lens having positive refractive power, wherein the object side surface of the first lens is convex near the optical axis; a second lens having negative refractive power, wherein the object-side surface of the second lens is convex near the optical axis, and the image-side surface of the second lens is concave near the optical axis; a third lens having refractive power, wherein the object side surface of the third lens is convex near the optical axis, and the image side surface of the third lens is concave near the optical axis; a fourth lens having negative refractive power, wherein the object-side surface of the fourth lens is concave near the optical axis; a fifth lens having refractive power, wherein the object side surface of the fifth lens is concave near the optical axis, and the image side surface of the fifth lens is convex near the optical axis; a sixth lens having refractive power, wherein the object side surface of the sixth lens is concave near the optical axis; a seventh lens having refractive power, wherein the image side surface of the seventh lens is concave near the optical axis; The optical lens satisfies the following relationship: 0.9≤TTL / f≤1;1 <ETL2 / CTL2≤1.6; Wherein, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, f is the effective focal length of the optical lens, ETL2 is the distance from the maximum effective aperture of the object side surface of the second lens to the maximum effective aperture of the image side surface of the second lens in the optical axis direction; CTL2 is the thickness of the second lens on the optical axis.

2. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 0.2 <SIN(FOV) / FNO<0.5; Among them, FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens.

3. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: -1 <f1 / f2<0; Wherein, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.

4. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: FNO / TTL<0.5mm -1 ; Wherein, FNO is the aperture number of the optical lens.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 3mm <SDL1 / RAD(FOV)<6mm; Wherein, SDL1 is the diameter of the maximum effective aperture of the object side of the first lens, and FOV is the maximum field of view angle of the optical lens.

6. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 0.9 <Imgh / TTL<1; Wherein, Imgh is the image height corresponding to the maximum field angle of the optical lens.

7. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: FBL / TTL>0.15 Wherein, FBL is the shortest distance from the image side surface of the seventh lens to the imaging surface of the optical lens in a direction parallel to the optical axis.

8. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 6mm <SDL1*FNO<10mm; Wherein, SDL1 is the diameter of the maximum effective aperture of the object side of the first lens; FNO is the aperture number of the optical lens.

9. The optical lens according to claim 1, characterized in that: The optical lens further includes an aperture, and the optical lens satisfies the following relationship: 0.2 <SD / Imgh<0.6; Wherein, SD is the diameter of the aperture, and Imgh is the image height corresponding to the maximum field angle of the optical lens.

10. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 50mm 2 <(R5*R6) / (R5 / R6)<100mm 2 ; Wherein, R5 is the curvature radius of the object side surface of the third lens at the optical axis, and R6 is the curvature radius of the image side surface of the third lens at the optical axis.

11. A camera module, characterized in that: The camera module includes: The optical lens according to any one of claims 1 to 10; A photosensitive element is arranged on the image side of the optical lens.

12. An electronic device, characterized in that: The electronic device comprises: housing; and The camera module described in claim 11 is mounted on the housing.

Images