Optical Lens, Camera Module and Electronic Device

Abstract

The present invention discloses an optical lens, a camera module and an electronic device. The optical lens sequentially includes a first lens with a negative optical power, a second lens with a negative optical power, a third lens with a positive optical power, a fourth lens with a negative optical power, a fifth lens with a negative optical power, a sixth lens with a positive optical power and a seventh lens with a negative optical power from the object side to the image side. The optical lens satisfies the following relational expression: -5 < f2 / f1 < 15, and the maximum optical distortion ≤ 10%, where f1 is the focal length of the first lens and f2 is the focal length of the second lens. In the optical lens according to the embodiment of the present invention, the ratio of the focal length of the second lens to the focal length of the first lens is between -5 and 15. In this way, the optical power of the lens can be reasonably distributed and the shape of the lens can be configured, which is beneficial to expanding the system field of view angle, improving the imaging quality, reducing the occurrence of distortion, and facilitating user use.

Description

Technical Field

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

[0002] With the rapid development of technology, photographic imaging technology is also constantly evolving. The optical lenses in related technologies include multiple lenses. The arrangement of multiple lenses can better reduce the phase difference and chromatic aberration, thereby improving the imaging quality, making the forming effect better, and enhancing the user experience. However, when the existing optical lens takes pictures and forms images, the distortion situation is relatively serious, which will affect the imaging quality, is not conducive to user use, and reduces the user experience. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide an optical lens, a camera module and an electronic device.

[0004] The optical lens according to the embodiment of the present invention sequentially includes, from the object side to the image side, a first lens with a negative optical power, a second lens with a negative optical power, the object side surface of the second lens is convex near the optical axis, the image side surface of the second lens is concave near the optical axis, a third lens with a positive optical power, the object side surface of the third lens is convex near the optical axis, a fourth lens with a negative optical power, a fifth lens with a negative optical power, a sixth lens with a positive optical power, the image side surface of the sixth lens is convex near the optical axis, both the object side surface and the image side surface of the sixth lens are aspherical surfaces, at least one of the object side surface and the image side surface of the sixth lens is provided with at least one inflection point, a seventh lens with a negative optical power. The optical lens satisfies the following relational expression: -5 < f2 / f1 < 15, and the maximum optical distortion ≤ 10%, where f1 is the focal length of the first lens and f2 is the focal length of the second lens.

[0005] The ratio of the focal length of the second lens to the focal length of the first lens of the optical lens according to the embodiment of the present invention is between -5 and 15. In this way, the optical power of the lens can be reasonably distributed and the shape of the lens can be configured, which is beneficial to expanding the system field of view angle, improving the imaging quality, reducing the occurrence of distortion, and being beneficial to user use.

[0006] In some embodiments, the optical lens satisfies the following relational expressions:

[0007] 2.5 < tan(HFOV)*TTL / ImgH < 3.5;

[0008] Wherein, tan(HFOV) is the tangent value of half of the maximum field of view angle of the optical lens, 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 ImgH is the radius of the maximum imaging circle of the optical lens.

[0009] When the above relationship is satisfied, the optical lens can achieve a larger field of view angle, and can reduce the size of the optical lens, which is beneficial to the imaging of the optical lens, making the imaging of the optical lens more comprehensive, and is beneficial to the miniaturized production of the optical lens.

[0010] In some embodiments, the optical lens satisfies the following relationship:

[0011] -15 < f5 / f < 20;

[0012] Wherein, f is the effective focal length of the optical lens, and f5 is the focal length of the fifth lens.

[0013] When the above relationship is satisfied, the optical power of the fifth lens can be reasonably distributed to correct the aberration of the optical lens, reduce the generation of distortion, and improve the imaging quality of the optical lens.

[0014] In some embodiments, the optical lens satisfies the following relationship:

[0015] -5 < (f1 + f4) / f < -3;

[0016] Wherein, f1 is the focal length of the first lens, f4 is the focal length of the sixth lens, and f is the effective focal length of the optical lens.

[0017] When the above relationship is satisfied, the focal length of the fourth lens can be reasonably distributed, thereby expanding the field of view angle of the optical lens, improving the imaging quality, and effectively correcting the distortion aberration, which is beneficial to the user's use.

[0018] In some embodiments, the optical lens satisfies the following relationship:

[0019] 1.0 < CT3 / (T12 + T23) < 1.8;

[0020] Wherein, CT3 is the thickness of the third lens on the optical axis, T12 is the air gap between the first lens and the second lens on the optical axis, and T23 is the air gap between the second lens and the third lens on the optical axis.

[0021] When the above - mentioned relational expressions are satisfied, there is sufficient space for assembling the first lens, the second lens, and the third lens, avoiding collision between adjacent lenses, ensuring the normal use of the optical lens. Moreover, it is beneficial to the thinning of the optical lens, and at the same time, it can also avoid the difficult assembly situation caused by too small values, increasing the sensitivity of the optical system.

[0022] In some embodiments, the optical lens satisfies the following relational expressions:

[0023] -4 < f12 / f456 < -1.5;

[0024] Wherein, f12 is the combined focal length of the first lens and the second lens, and f456 is the combined focal length of the fourth lens, the fifth lens, and the sixth lens.

[0025] When the above - mentioned relational expressions are satisfied, the magnitudes and directions of the combined focal length of the first lens and the second lens, and the combined focal length of the fourth lens, the fifth lens, and the sixth lens can be reasonably allocated to adjust the system spherical aberration of the optical lens, thereby achieving the balance of the system spherical aberration of the optical lens, and further improving the forming quality of the optical lens.

[0026] In some embodiments, the optical lens satisfies the following relational expressions:

[0027] -6.0 < R12 / R13 < -2.5;

[0028] Wherein, R12 is the curvature radius of the object - side surface of the sixth lens on the optical axis, and R13 is the curvature radius of the image - side surface of the sixth lens on the optical axis.

[0029] When the above - mentioned relational expressions are satisfied, by adjusting the curvature radius of the sixth lens, the processing feasibility of the sixth lens can be ensured, which is beneficial to the production of the sixth lens, and can effectively correct spherical aberration and astigmatism, and further improve the imaging quality of the optical lens.

[0030] In some embodiments, the optical lens satisfies the following relational expressions:

[0031] 0 < (R8 + R9) / (R8 - R9) < 2.0;

[0032] Wherein, R8 is the curvature radius of the object - side surface of the fourth lens on the optical axis, and R9 is the curvature radius of the image - side surface of the fourth lens on the optical axis.

[0033] When the above - mentioned relational expressions are satisfied, by adjusting the relationship between the object side of the fourth lens and the image side of the fourth lens, the optical deflection angles borne by the remaining lenses can be effectively distributed, and the distortion aberration can be changed, thereby improving the forming quality of the optical lens.

[0034] The camera module according to an embodiment of the present invention includes the optical lens and the photosensitive element according to any one of the above - mentioned embodiments, and the photosensitive element is disposed on the image side of the optical lens.

[0035] The ratio of the focal length of the second lens to the focal length of the first lens in the camera module according to an embodiment of the present invention is between - 5 and 15. In this way, the lens optical power can be reasonably distributed and the shape of the lens can be configured, which is beneficial to expanding the system field of view angle, improving the imaging quality, reducing the occurrence of distortion, and facilitating user use.

[0036] The electronic device according to an embodiment of the present invention includes a housing and the above - mentioned camera module, and the camera module is installed in the housing.

[0037] The ratio of the focal length of the second lens to the focal length of the first lens in the electronic device according to an embodiment of the present invention is between - 5 and 15. In this way, the lens optical power can be reasonably distributed and the shape of the lens can be configured, which is beneficial to expanding the system field of view angle, improving the imaging quality, reducing the occurrence of distortion, and facilitating user use.

[0038] The additional aspects and advantages of the embodiments of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0039] The above - mentioned and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0040] Figure 1 is a schematic structural diagram of the optical lens according to Embodiment 1 of the present invention;

[0041] Figure 2A is a spherical aberration curve diagram (mm) of Embodiment 1 of the present invention;

[0042] Figure 2B is an astigmatism curve diagram (mm) of Embodiment 1 of the present invention;

[0043] Figure 2C is a distortion curve diagram (%) of Embodiment 1 of the present invention;

[0044] Figure 3 is a schematic structural diagram of the optical lens according to Embodiment 2 of the present invention;

[0045] Figure 4Ais the spherical aberration curve graph (mm) of the second embodiment of the present invention;

[0046] Figure 4B is the astigmatism curve graph (mm) of the second embodiment of the present invention;

[0047] Figure 4C is the distortion curve graph (%) of the second embodiment of the present invention;

[0048] Figure 5 is the structural schematic diagram of the optical lens of the third embodiment of the present invention;

[0049] Figure 6A is the spherical aberration curve graph (mm) of the third embodiment of the present invention;

[0050] Figure 6B is the astigmatism curve graph (mm) of the third embodiment of the present invention;

[0051] Figure 6C is the distortion curve graph (%) of the third embodiment of the present invention;

[0052] Figure 7 is the structural schematic diagram of the optical lens of the fourth embodiment of the present invention;

[0053] Figure 8A is the spherical aberration curve graph (mm) of the fourth embodiment of the present invention;

[0054] Figure 8B is the astigmatism curve graph (mm) of the fourth embodiment of the present invention;

[0055] Figure 8C is the distortion curve graph (%) of the fourth embodiment of the present invention;

[0056] Figure 9 is the structural schematic diagram of the optical lens of the fifth embodiment of the present invention;

[0057] Figure 10A is the spherical aberration curve graph (mm) of the fifth embodiment of the present invention;

[0058] Figure 10B is the astigmatism curve graph (mm) of the fifth embodiment of the present invention;

[0059] Figure 10C is the distortion curve graph (%) of the fifth embodiment of the present invention;

[0060] Figure 11 is the structural schematic diagram of the camera module of the implementation manner of the present invention;

[0061] Figure 12 is the structural schematic diagram of the electronic device of the implementation manner of the present invention. Specific implementation manners

[0062] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 thus should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0066] Please refer to Figure 1, in the real-time mode of the present invention, the optical lens 10 from the object side to the image side includes a first lens L1 with a negative focal power, a second lens L2 with a focal power, a third lens L3 with a positive focal power, a fourth lens L4 with a negative focal power, a fifth lens L5 with a focal power, a sixth lens L6 with a positive focal power, and a seventh lens L7 with a negative focal power.

[0067] The first lens L1 has an object side surface S1 and an image side surface S2. The second lens L2 has an object side surface S3 and an image side surface S4. The object side surface S3 of the second lens L2 is convex near the optical axis, and the image side surface S4 of the second lens L2 is concave near the optical axis. The third lens L3 has an object side surface S5 and an image side surface S6. The object side surface S5 of the third lens L3 is convex near the optical axis. The fourth lens L4 has an object side surface S7 and an image side surface S8. The fifth lens L5 has an object side surface S9 and an image side surface S10. The sixth lens L6 has an object side surface S11 and an image side surface S12. The image side surface S12 of the sixth lens L6 is convex near the optical axis. Both the object side surface S11 and the image side surface S12 of the sixth lens L6 are aspherical surfaces. At least one of the object side surface S11 and the image side surface S12 of the sixth lens L6 is provided with at least one inflection point. That is to say, the object side surface S11 of the sixth lens L6 is provided with one inflection point, and the image side surface S12 of the sixth lens L6 is not provided with an inflection point; or, the object side surface S11 of the sixth lens L6 is not provided with an inflection point, and the image side surface S12 of the sixth lens L6 is provided with one inflection point; or, the object side surface S11 of the sixth lens L6 is provided with one inflection point, and the image side surface S12 of the sixth lens L6 is provided with one inflection point; or, the object side surface S11 of the sixth lens L6 is provided with multiple inflection points, and the image side surface S12 of the sixth lens L6 is not provided with an inflection point; or, the object side surface S11 of the sixth lens L6 is not provided with an inflection point, and the image side surface S12 of the sixth lens L6 is provided with multiple inflection points; or, the object side surface S11 of the sixth lens L6 is provided with multiple inflection points, and the image side surface S12 of the sixth lens L6 is provided with multiple inflection points; or, the object side surface S11 of the sixth lens L6 is provided with one inflection point, and the image side surface S12 of the sixth lens L6 is provided with multiple inflection points; or, the object side surface S11 of the sixth lens L6 is provided with multiple inflection points, and the image side surface S12 of the sixth lens L6 is provided with one inflection point. The seventh lens L7 has an object side surface S13 and an image side surface S14.

[0068] Among them, the inflection point is also called the turning point. Mathematically, it refers to the point that changes the upward or downward direction of the curve. Intuitively, the inflection point is the point where the tangent line crosses the curve (i.e., the convex-concave demarcation point of the curve).

[0069] In some embodiments, the optical lens 10 further includes an aperture stop STO. The aperture stop STO can be disposed on the surface of any one lens, or before the first lens L1, or between any two lenses, or between the seventh lens L7 and the photosensitive element 20.

[0070] When the optical lens 10 is used for imaging, the light emitted or reflected by the object OBJ enters the optical lens 10 from the object side direction and passes through 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, and finally converges on the imaging surface S17.

[0071] Furthermore, the optical lens 10 satisfies the following relationship:

[0072] -5 < f2 / f1 < 15, and the maximum optical distortion ≤ 10%;

[0073] Wherein, f1 is the focal length of the first lens L1, and f2 is the focal length of the second lens L2.

[0074] That is to say, f2 / f1 can be any value in the interval (-5, 15), for example, the value is -4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5, 0, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10.5, 11, 12, 13, 13.5, 14, 14.5, etc.

[0075] The maximum optical distortion is less than or equal to 10%, so that the distortion of the optical lens 10 can be reduced, the imaging quality of the optical lens 10 can be improved, and the user experience can be enhanced.

[0076] In the optical lens 10 according to the embodiment of the present invention, the ratio of the focal length of the second lens L2 to the focal length of the first lens L1 is between -5 and 15. In this way, the lens optical power can be reasonably distributed and the shape of the lens can be configured, which is beneficial to expanding the system field of view angle, improving the imaging quality, reducing the occurrence of distortion, and facilitating user use.

[0077] In some embodiments, the optical lens 10 satisfies the following relationship:

[0078] 2.5 < tan(HFOV)*TTL / ImgH < 3.5;

[0079] Wherein, tan(HFOV) is the tangent value of half of the maximum field of view angle of the optical lens 10, TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface S17 of the optical lens 10 on the optical axis, and ImgH is the maximum imaging circle radius of the optical lens 10.

[0080] That is to say, tan(HFOV)*TTL / ImgH can be any value in the range of (2.5, 3.5), such as 2.55, 2.56, 2.6, 2.62, 2.65, 2.68, 2.7, 2.75, 2.79, 2.8, 2.83, 2.86, 2.91, 2.94, 2.95, 2.99, 3, 3.02, 3.1, 3.18, 3.28, 3.4, 3.44, 3.48, 3.49, etc.

[0081] When the above relationship is satisfied, the optical lens 10 can achieve a larger field of view angle, and the size of the optical lens 10 can be reduced, which is beneficial to the imaging of the optical lens 10, making the imaging of the optical lens 10 more comprehensive, and is beneficial to the miniaturized production of the optical lens 10.

[0082] In some embodiments, the optical lens 10 satisfies the following relationship:

[0083] -15 < f5 / f < 20;

[0084] Wherein, f is the effective focal length of the optical lens 10, and f5 is the focal length of the fifth lens L5.

[0085] That is to say, f5 / f can be any value in the range of (-15, 20), such as -14.5, -14, -13.5, -13, -12.5, -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 17.8, 18, 19, 19.5, 19.8, etc.

[0086] When the above relationship is satisfied, the optical power of the fifth lens L5 can be reasonably distributed to cooperate with the correction of the aberration of the optical lens 10, reduce the generation of distortion, and improve the imaging quality of the optical lens 10.

[0087] In some embodiments, the optical lens 10 satisfies the following relationship:

[0088] -5 < (f1 + f4) / f < -3;

[0089] Wherein, f1 is the focal length of the first lens L1, f4 is the focal length of the sixth lens L6, and f is the effective focal length of the optical lens 10.

[0090] That is to say, f1 + f4 can take any value in the interval (-5, -3). For example, the value can be -4.9, -4.8, -4.7, -4.5, -4.3, -4, -3.8, -3.7, -3.65, -3.62, -3.6, -3.58, -3.55, -3.52, -3.48, -3.45, -3.41, -3.38, -3.35, -3.32, -3.3, -3.28, -3.24, -3.21, -3.18, -3.16, -3.13, -3.11, -3.08, -3.05, -3.01, etc.

[0091] When the above - mentioned relational expressions are satisfied, the focal length of the fourth lens L4 can be reasonably distributed, thereby expanding the field - of - view angle of the optical lens 10, improving the imaging quality, and effectively correcting the distortion aberration, which is beneficial to the user.

[0092] In some embodiments, the optical lens 10 satisfies the following relational expressions:

[0093] 1.0 < CT3 / (T12 + T23) < 1.8;

[0094] Wherein, CT3 is the thickness of the third lens L3 on the optical axis, T12 is the air gap between the first lens L1 and the second lens L2 on the optical axis, and T23 is the air gap between the second lens L2 and the third lens L3 on the optical axis.

[0095] That is to say, CT3 / (T12 + T23) can take any value in the interval (1, 1.8). For example, the value can be 1.05, 1.06, 1.08, 1.09, 1.1, 1.12, 1.15, 1.17, 1.19, 1.21, 1.23, 1.25, 1.29, 1.32, 1.35, 1.38, 1.39, 1.45, 1.46, 1.49, 1.52, 1.53, 1.58, 1.62, 1.64, 1.69, 1.75, 1.78, etc.

[0096] When the above - mentioned relational expressions are satisfied, there is enough space for assembling the first lens L1, the second lens L2 and the third lens L3, avoiding the collision between adjacent two lenses, ensuring the normal use of the optical lens 10, and being beneficial to the thinning of the optical lens 10. At the same time, it can also avoid the situation that the assembly is difficult due to too small a value, and increase the sensitivity of the optical system.

[0097] In some embodiments, the optical lens 10 satisfies the following relational expressions:

[0098] -4 < f12 / f456 < -1.5;

[0099] Wherein, f12 is the combined focal length of the first lens L1 and the second lens L2, and f456 is the combined focal length of the fourth lens L4, the fifth lens L5, and the sixth lens L6.

[0100] That is to say, f12 / f456 can be any value in the interval (-4, -1.5). For example, the value can be -3.98, -3.95, -3.92, -3.9, -3.85, -3.8, -3.76, -3.7, -3.61, -3.59, -3.52, -3.48, -3.4, -3.38, -3.3, -3.2, -3.1, -3, -2.8, -2.6, -2.3, -2.1, -1.95, -1.85, -1.78, -1.65, -1.55, -1.45, etc.

[0101] When the above relational expressions are satisfied, the magnitudes and directions of the combined focal length of the first lens L1 and the second lens L2, and the combined focal length of the fourth lens L4, the fifth lens L5, and the sixth lens L6 can be reasonably allocated to adjust the system spherical aberration of the optical lens 10, so as to achieve the balance of the system spherical aberration of the optical lens 10, and further improve the forming quality of the optical lens 10.

[0102] In some embodiments, the optical lens 10 satisfies the following relational expressions:

[0103] -6.0 < R12 / R13 < -2.5;

[0104] Wherein, R12 is the curvature radius of the object side surface of the sixth lens L6 on the optical axis, and R13 is the curvature radius of the image side surface of the sixth lens L6 on the optical axis.

[0105] That is to say, R12 / R13 can be any value in the interval (-6, -2.5). For example, the value can be -5.9, -5.8, -5.7, -5.6, -5.5, -5.4, -5.2, -5.1, -5, -4.9, -4.7, -4.6, -4.5, -4.2, -4.1, -3.8, -3.7, -3.5, -3.4, -3, -2.9, -2.8, -2.7, -2.6, -2.55, etc.

[0106] When the above relational expressions are satisfied, by adjusting the curvature radius of the sixth lens L6, the processing feasibility of the sixth lens L6 can be ensured, which is beneficial to the production of the sixth lens L6, and the spherical aberration and astigmatism can be effectively corrected, and further the imaging quality of the optical lens 10 can be improved.

[0107] In some embodiments, the optical lens 10 satisfies the following relational expressions:

[0108] 0 < (R8 + R9) / (R8 - R9) < 2.0;

[0109] Wherein, R8 is the curvature radius of the object-side surface of the fourth lens L4 on the optical axis, and R9 is the curvature radius of the image-side surface of the fourth lens L4 on the optical axis.

[0110] That is to say, (R8 + R9) / (R8 - R9) can be any value in the range of (0, 2). For example, the value can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.05, 1.1, 1.15, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.82, 1.85, 1.89, 1.92, 1.95, 1.98, etc.

[0111] When the above relational expressions are satisfied, by adjusting the relationship between the object-side surface and the image-side surface of the fourth lens L4, the optical deflection angles borne by the remaining lenses can be effectively distributed, and the distortion aberration can be changed, thereby improving the forming quality of the optical lens 10.

[0112] 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 plastics.

[0113] Since the first lens L1 to the seventh lens L7 all adopt plastic lenses, the optical lens 10 can be thinned while effectively eliminating aberration and meeting the requirements of high pixel, and the cost is relatively low.

[0114] In the embodiment of the present invention, the infrared filter L8 is made of glass. Of course, in other embodiments, the infrared filter L8 can also be made of other materials. It can be specifically set according to the actual situation. It is not limited here.

[0115] In some embodiments, at least one surface of at least one lens in the optical lens 10 is an aspherical surface. For example, in the embodiment of the present invention, the object-side surface S1 and the image-side surface S2 of the first lens L1 are aspherical surfaces, the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspherical surfaces, the object-side surface S5 and the image-side surface S6 of the third lens L3 are aspherical surfaces, the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are aspherical surfaces, the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are aspherical surfaces, the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are aspherical surfaces, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces, and the object-side surface S15 and the image-side surface S16 of the infrared filter are spherical surfaces.

[0116] That is to say, 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 aspherical mirrors, and the infrared filter L8 is spherical. The aspherical surface profile is determined by the following formula:

[0117]

[0118] Where Z is the longitudinal distance from any point on the aspherical surface to the surface vertex, r is the distance from any point on the aspherical surface to the optical axis, c is the vertex curvature (the reciprocal of the radius of curvature), k is the conic constant, and Ai is the correction coefficient of the i-th order of the aspherical surface.

[0119] In this way, the optical lens 10 can effectively reduce the total length of the optical lens 10 by adjusting the radius of curvature and aspherical coefficient of each lens surface, and can effectively correct the aberration of the optical lens 10 and improve the imaging quality.

[0120] Embodiment 1:

[0121] Please refer to Figure 1 , in Embodiment 1, the first lens L1 has a negative optical power, the second lens L2 has a negative optical power, the third lens L3 has a positive optical power, the fourth lens L4 has a negative optical power, the fifth lens L5 has a negative optical power, the sixth lens L6 has a positive optical power, and the seventh lens L7 has a negative optical power.

[0122] The object side S1 is concave near the optical axis and convex near the circumference, and the image side S2 is concave. The object side S3 is convex, and the image side S4 is concave. The object side S5 is convex, and the image side S6 is convex. The object side S7 is concave, the image side S8 is concave near the optical axis and convex near the circumference. The object side S9 is convex, and the image side S10 is concave. The object side S11 is convex near the optical axis and concave near the circumference, and the image side S12 is convex. The object side S13 is convex near the optical axis and concave near the circumference, the image side S14 is concave near the optical axis and convex near the circumference. Further, at least one of the object side S11 and the image side S12 includes at least one inflection point. In this way, the angle of the off-axis field light incident on the photosensitive element 20 can be effectively suppressed, thereby correcting the aberration of the off-axis field.

[0123] Please refer to Figures 2A to 2C , the optical lens 10 satisfies the conditions in the following table:

[0124] Table 1

[0125]

[0126]

[0127] In Table 1, f is the effective focal length of the optical lens 10; FNO is the f-number of the optical lens 10; HFOV is half of the maximum field of view angle of the optical lens 10; TTL is the total optical length of the optical lens 10, that is, the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis. Among them, the unit of the Y radius (curvature radius), thickness, and focal length is mm. The reference wavelengths for the focal length, refractive index, and Abbe number are all 587.6 nm.

[0128] Table 2

[0129]

[0130]

[0131] Table 2 above lists the conic coefficient K and the even-order correction coefficient Ai of each aspheric surface (S1 - S14) of the optical lens 10, which are obtained from the surface formula of the above aspheric surface.

[0132] Figures 2A to 2C They are respectively the spherical aberration curve graph, astigmatism curve graph, and distortion curve graph in the first embodiment.

[0133] The abscissa of the spherical aberration curve graph represents the focus shift, and the ordinate represents the normalized field of view. Figure 2A When the wavelengths given in are 656.2725 nm, 587.5618 nm, and 486.1327 nm respectively, the focus shifts at different fields of view are all within 0 - 0.01 mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0134] The abscissa of the astigmatism curve graph represents the focus shift, and the ordinate represents the image height, with the unit being mm. Figure 2B The astigmatism curve graph given in shows that when the wavelength is 587.5618 nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.1 mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0135] The abscissa of the distortion curve graph represents the distortion rate, and the ordinate represents the image height, with the unit being mm. Figure 2C The distortion curve graph given in shows that when the wavelength is 587.5618 nm, the distortion is within ±3.4%, indicating that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0136] Embodiment 2

[0137] Please refer to Figure 3, in the second embodiment, the first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a positive optical power, the fourth lens L4 has a negative optical power, the fifth lens L5 has a negative optical power, the sixth lens L6 has a positive optical power, and the seventh lens L7 has a negative optical power.

[0138] The object side S1 is concave near the optical axis and convex near the circumference, and the image side S2 is concave. The object side S3 is convex, and the image side S4 is concave. The object side S5 is convex, and the image side S6 is convex. The object side S7 is concave, the image side S8 is concave near the optical axis and convex near the circumference. The object side S9 is convex, and the image side S10 is concave. The object side S11 is convex near the optical axis and concave near the circumference, and the image side S12 is convex. The object side S13 is convex near the optical axis and concave near the circumference, the image side S14 is concave near the optical axis and convex near the circumference. Further, at least one of the object side S11 and the image side S12 includes at least one inflection point. Thus, the angle of light incident on the photosensitive element 20 from the off-axis field of view can be effectively suppressed, thereby correcting the aberration of the off-axis field of view.

[0139] Please refer to Figures 4A to 4C , the optical lens 10 satisfies the conditions in the following table:

[0140] Table 3

[0141]

[0142] In Table 3, f is the effective focal length of the optical lens 10; FNO is the f-number of the optical lens 10; HFOV is half of the maximum field of view angle of the optical lens 10; TTL is the total optical length of the optical lens 10, that is, the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis. Among them, the unit of the Y radius (radius of curvature), thickness, and focal length is mm. The reference wavelengths for the focal length, refractive index, and Abbe number are all 587.6 nm.

[0143] Table 4

[0144]

[0145]

[0146] The above Table 4 lists the conic coefficients K and the even-order correction coefficients Ai of each aspherical surface (S1 - S14) of the optical lens 10, which are obtained from the surface formula of the above aspherical surface.

[0147] Figures 4A to 4B They are respectively the spherical aberration curve graph, astigmatism curve graph, and distortion curve graph in the second embodiment.

[0148] The abscissa of the spherical aberration curve represents the focal shift, and the ordinate represents the normalized field of view. Figure 4A When the wavelengths given in are 656.2725 nm, 587.5618 nm, and 486.1327 nm respectively, the focal shifts of different fields of view are all within ±0.01 mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0149] The abscissa of the astigmatism curve represents the focal shift, and the ordinate represents the image height, with the unit of mm. Figure 4B The astigmatism curve given in shows that when the wavelength is 587.5618 nm, the focal shifts of the sagittal image plane and the meridional image plane are both within ±0.5 mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0150] The abscissa of the distortion curve represents the distortion rate, and the ordinate represents the image height, with the unit of mm. Figure 4C The distortion curve given in shows that when the wavelength is 587.5618 nm, the distortion is within ±3.4%, indicating that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0151] Embodiment Three

[0152] Please refer to Figure 5 , in Embodiment Three, the first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a positive optical power, the fourth lens L4 has a negative optical power, the fifth lens L5 has a negative optical power, the sixth lens L6 has a positive optical power, and the seventh lens L7 has a negative optical power.

[0153] The object side S1 is a convex surface, and the image side S2 is a concave surface. The object side S3 is a convex surface, and the image side S4 is a concave surface. The object side S5 is a convex surface, and the image side S6 is a convex surface. The object side S7 is a convex surface near the optical axis and a concave surface near the circumference, and the image side S8 is a concave surface. The object side S9 is a convex surface, and the image side S10 is a concave surface near the optical axis and a convex surface near the circumference. The object side S11 is a convex surface near the optical axis and a concave surface near the circumference, and the image side S12 is a convex surface. The object side S13 is a convex surface near the optical axis and a concave surface near the circumference, and the image side S14 is a concave surface near the optical axis and a convex surface near the circumference. Further, at least one of the object side S11 and the image side S12 includes at least one inflection point. In this way, the angle of the off-axis field light incident on the photosensitive element 20 can be effectively suppressed, thereby correcting the off-axis field aberration.

[0154] Please refer to Figures 6A to 6C , the optical lens 10 satisfies the conditions in the following table:

[0155] Table 5

[0156]

[0157] In Table 5, f is the effective focal length of the optical lens 10; FNO is the f-number of the optical lens 10; HFOV is half of the maximum field of view angle of the optical lens 10; TTL is the total optical length of the optical lens 10, that is, the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis. Among them, the units of the Y radius (curvature radius), thickness, and focal length are mm. The reference wavelengths for the focal length, refractive index, and Abbe number are all 587.6 nm.

[0158] Table 6

[0159]

[0160]

[0161] The above Table 6 lists the conic coefficient K and the even-order correction coefficient Ai of each aspheric surface (S1 - S14) of the optical lens 10, which are obtained from the surface formula of the above aspheric surface.

[0162] Figures 6A to 6C They are respectively the spherical aberration curve graph, astigmatism curve graph, and distortion curve graph in Embodiment III.

[0163] The abscissa of the spherical aberration curve graph represents the focus shift, and the ordinate represents the normalized field of view. Figure 6A When the wavelengths given in are 656.2725 nm, 587.5618 nm, and 486.1327 nm respectively, the focus shifts at different fields of view are all within ±0.02 mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0164] The abscissa of the astigmatism curve graph represents the focus shift, and the ordinate represents the image height, with the unit being mm. Figure 6B The astigmatism curve graph given in shows that when the wavelength is 587.5618 nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.05 mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0165] The abscissa of the distortion curve graph represents the distortion rate, and the ordinate represents the image height, with the unit being mm. Figure 6C The distortion curve graph given in shows that when the wavelength is 587.5618 nm, the distortion is within ±3.4%, indicating that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0166] Embodiment IV

[0167] Please refer to Figure 7, in the fourth embodiment, the first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a positive optical power, the fourth lens L4 has a negative optical power, the fifth lens L5 has a positive optical power, the sixth lens L6 has a positive optical power, and the seventh lens L7 has a negative optical power.

[0168] The object side S1 is convex, and the image side S2 is concave. The object side S3 is convex, and the image side S4 is concave. The object side S5 is convex, and the image side S6 is convex. The object side S7 is convex near the optical axis and concave near the circumference, and the image side S8 is concave. The object side S9 is convex, and the image side S10 is concave near the optical axis and convex near the circumference. The object side S11 is convex near the optical axis and concave near the circumference, and the image side S12 is convex. The object side S13 is convex near the optical axis and concave near the circumference, and the image side S14 is concave near the optical axis and convex near the circumference. Further, at least one of the object side S11 and the image side S12 includes at least one inflection point. Thus, the angle of light incident on the photosensitive element 20 in the off-axis field of view can be effectively suppressed, thereby correcting the aberration of the off-axis field of view.

[0169] Please refer to Figures 8A to 8C , the optical lens 10 satisfies the conditions in the following table:

[0170] Table 7

[0171]

[0172] In Table 7, f is the effective focal length of the optical lens 10; FNO is the f-number of the optical lens 10; HFOV is half of the maximum field of view angle of the optical lens 10; TTL is the total optical length of the optical lens 10, that is, the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis. Among them, the unit of the Y radius (radius of curvature), thickness, and focal length is mm. The reference wavelengths of the focal length, refractive index, and Abbe number are all 587.6 nm.

[0173] Table 8

[0174]

[0175]

[0176] Table 8 above lists the conic coefficients K and even-order correction coefficients Ai of each aspherical surface (S1 - S14) of the optical lens 10, which are obtained from the surface formula of the above aspherical surface.

[0177] Figures 8A to 8C They are respectively the spherical aberration curve graph, astigmatism curve graph, and distortion curve graph in the fourth embodiment.

[0178] The abscissa of the spherical aberration curve represents the focus shift, and the ordinate represents the normalized field of view. Figure 8A When the wavelengths given in [reference] are 656.2725 nm, 587.5618 nm, and 486.1327 nm respectively, the focus shifts of different fields of view are all within ±0.02 mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0179] The abscissa of the astigmatism curve represents the focus shift, and the ordinate represents the image height, with the unit of mm. Figure 8B The astigmatism curve given in [reference] shows that when the wavelength is 587.5618 nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.1 mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0180] The abscissa of the distortion curve represents the distortion rate, and the ordinate represents the image height, with the unit of mm. Figure 8C The distortion curve given in [reference] shows that when the wavelength is 587.5618 nm, the distortion is within ±3.4%, indicating that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0181] Embodiment Five

[0182] Please refer to Figure 9 , in Embodiment Five, the first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a positive optical power, the fourth lens L4 has a negative optical power, the fifth lens L5 has a positive optical power, the sixth lens L6 has a positive optical power, and the seventh lens L7 has a negative optical power.

[0183] The object side S1 is a convex surface, and the image side S2 is a concave surface. The object side S3 is a convex surface, and the image side S4 is a concave surface. The object side S5 is a convex surface, and the image side S6 is a convex surface. The object side S7 is a concave surface, and the image side S8 is a concave surface. The object side S9 is a convex surface, the image side S10 is a concave surface near the optical axis, and the image side S10 is a convex surface near the circumference. The object side S11 is a convex surface near the optical axis, the object side S11 is a concave surface near the circumference, and the image side S12 is a convex surface. The object side S13 is a convex surface near the optical axis, the object side S13 is a concave surface near the circumference, the image side S14 is a concave surface near the optical axis, and the image side S14 is a convex surface near the circumference. Further, at least one of the object side S11 and the image side S12 includes at least one inflection point. In this way, the angle of the off-axis field light incident on the photosensitive element 20 can be effectively suppressed, thereby correcting the off-axis field aberration.

[0184] Please refer to Figures 10A to 10C , the optical lens 10 satisfies the conditions in the following table:

[0185] Table 9

[0186]

[0187] In Table 9, f is the effective focal length of the optical lens 10; FNO is the f-number of the optical lens 10; HFOV is half of the maximum field of view angle of the optical lens 10; TTL is the total optical length of the optical lens 10, that is, the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis. Among them, the unit of the Y radius (curvature radius), thickness, and focal length is mm. The reference wavelengths for the focal length, refractive index, and Abbe number are all 587.6 nm.

[0188] Table 10

[0189]

[0190] Table 10 above lists the conic coefficient K and the even-order correction coefficient Ai of each aspherical surface (S1 - S14) of the optical lens 10, which are obtained from the surface formula of the above aspherical surface.

[0191] Figures 10A to 10C They are respectively the spherical aberration curve graph, astigmatism curve graph, and distortion curve graph in the fifth embodiment.

[0192] The abscissa of the spherical aberration curve graph represents the focus shift, and the ordinate represents the normalized field of view. Figure 10A When the wavelengths given in it are 656.2725 nm, 587.5618 nm, and 486.1327 nm respectively, the focus shifts at different fields of view are all within ±0.02 mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0193] The abscissa of the astigmatism curve graph represents the focus shift, and the ordinate represents the image height, with the unit being mm. Figure 10B The astigmatism curve graph given in it shows that when the wavelength is 587.5618 nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.1 mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0194] The abscissa of the distortion curve graph represents the distortion rate, and the ordinate represents the image height, with the unit being mm. Figure 10C The distortion curve graph given in it shows that when the wavelength is 587.5618 nm, the distortion is within ±3.1%, indicating that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0195] For the above relational expression -5 < f2 / f1 < 15, the values of f2 and f1 in the first to fifth embodiments are as shown in Table 11 below.

[0196] Table 11

[0197] - f2 / f1 Value of f2 / f1 First Embodiment -60.77 / (-5.54) 10.969 Second Embodiment 11.78 / (-4.66) -2.528 Third Embodiment 14.29 / (-4.36) -3.278 Fourth Embodiment 10.56 / (-3.8) -2.779 Fifth Embodiment 9.19 / (-3.64) -2.525

[0198] For the above relationship 2.5 < tan(HFOV) * TTL / ImgH < 3.5, the values of HFOV, TTL, and ImgH in the first to fifth embodiments are as shown in Table 12 below.

[0199] Table 12

[0200] - tan(HFOV)*TTL / ImgH Value of tan(HFOV)*TTL / ImgH First Embodiment tan(56.3)*6.831 / 3.4 3.013 Second Embodiment tan(60)*6.569 / 3.4 3.346 Third Embodiment tan(56)*6.616 / 3.4 2.885 Fourth Embodiment tan(57)*6.5 / 3.4 2.944 Fifth Embodiment tan(55)*6.555 / 3.1 3.02

[0201] For the above relationship -15 < f5 / f < 20, the values of f5 and f in the first to fifth embodiments are as shown in Table 13 below.

[0202] Table 13

[0203] - f5 / f Value of f5 / f First Embodiment -30.02 / 2.39 -12.561 Second Embodiment -27.3 / 2.11 -12.938 Third Embodiment -19.25 / 2.37 -8.122 Fourth Embodiment 41.69 / 2.3 18.126 Fifth Embodiment 28.65 / 2.15 13.325

[0204] For the above relationship -3 < (f1 + f4) / f < -5, the values of f1, f4, and f in the first to fifth embodiments are as shown in Table 14 below.

[0205] Table 14

[0206] - (f1 + f4) / f Value of f5 / f First Embodiment (-5.54-4.69) / 2.39 -4.280 Second Embodiment (-4.66-4.36) / 2.11 -4.275 Third Embodiment (-4.36-5.27) / 2.37 -4.063 Fourth Embodiment (-3.8-5.52) / 2.3 -4.052 Fifth Embodiment (-3.64-4.16) / 2.15 -3.630

[0207] For the above relationship 1.0 < CT3 / (T12 + T23) < 1.8, the values of CT3, T12, and T23 in the first to fifth embodiments are as shown in Table 15 below.

[0208] Table 15

[0209] CT3 / (T12 + T23) Value of CT3 / (T12 + T23) First Embodiment 0.956 / (0.245+0.358) 1.58 Second Embodiment 1.02 / (0.655+0.146) 1.27 Third Embodiment 0.92 / (0.292+0.332) 1.47 Fourth Embodiment 0.904 / (0.255+0.303) 1.62 Fifth Embodiment 0.9 / (0.421+0.312) 1.23

[0210] For the above relationship -4 < f12 / f456 < -1.5, the values of f12 and f456 in the first to fifth embodiments are as shown in Table 16 below.

[0211] Table 16

[0212] - f12 / f456 Value of f12 / f456 First Embodiment -4.83 / 2.34 -2.064 Second Embodiment -8.02 / 2.21 -3.62 Third Embodiment -5.92 / 2.24 -2.64 Fourth Embodiment -5.63 / 2.22 -2.54 Fifth Embodiment -5.92 / 2.29 -2.59

[0213] For the above relationship -6.0 < R12 / R13 < -2.5, the values of R12 and R13 in the first to fifth embodiments are as shown in Table 17 below.

[0214] Table 17

[0215] - R12 / R13 Value of R12 / R13 First Embodiment 5.022 / -1.378 -3.64 Second Embodiment 6.253 / -1.274 -4.91 Third Embodiment 4.352 / -1.365 -3.19 Fourth Embodiment 5.583 / -1.431 -3.9 Fifth Embodiment 8.532 / -1.532 -5.57

[0216] For the above relationship 0 < (R8 + R9) / (R8 - R9) < 2.0, the values of R8 and R9 in the first to fifth embodiments are as shown in Table 18 below.

[0217] Table 18

[0218] - (R8 + R9) / (R8 - R9) (R8 + R9) / (R8 - R9) value First Embodiment (-24.436+3.567) / (-24.436-3.567) 0.75 Second Embodiment (-12.492+3.3768) / (-12.492-3.3768) 0.57 Third Embodiment (160.979+3.382) / (160.979-3.382) 1.04 Fourth Embodiment (34.555+3.287) / ((34.555-3.287)) 1.21 Fifth Embodiment (-10.493+3.723) / (-10.493-3.723) 0.48

[0219] Please refer to Figure 11 , the camera module 100 of the embodiment of the present invention includes an optical lens 10 and an image sensor 20. The image sensor 20 is disposed on the image side of the optical lens 10.

[0220] The image sensor 20 may adopt a complementary metal oxide semiconductor (CMOS) image sensor 20 or a charge-coupled device (CCD) image sensor 20.

[0221] In the embodiment of the present invention, the ratio of the focal length of the second lens L2 to the focal length of the first lens L1 of the camera module 100 is between -5 and 15. Thus, the lens optical power can be reasonably distributed and the shape of the lens can be configured, which is beneficial to expanding the system field of view angle, improving the imaging quality, reducing the occurrence of distortion, and facilitating user use.

[0222] Please refer to Figure 12 , the electronic device 1000 of the embodiment of the present invention includes a housing 200 and a camera module 100. The camera module 100 is installed on the housing 200.

[0223] In the embodiment of the present invention, the ratio of the focal length of the second lens L2 to the focal length of the first lens L1 of the electronic device 1000 is between -5 and 15. Thus, the lens optical power can be reasonably distributed and the shape of the lens can be configured, which is beneficial to expanding the system field of view angle, improving the imaging quality, reducing the occurrence of distortion, and facilitating user use.

[0224] The electronic device 1000 of the embodiment of the present invention includes, but is not limited to, information terminal devices such as smart phones (as Figure 12 shown), mobile phones, personal digital assistants (PDAs), game consoles, personal computers (PCs), cameras, smart watches, tablet computers, etc., or home appliance products with a photographing function.

[0225] In the description of this specification, the descriptions referring to terms such as "certain embodiments", "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the said embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0226] In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0227] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An optical lens, characterized in that, it has a total of seven lenses with optical power, and the optical lens successively includes from the object side to the image side; a first lens, the first lens having a negative optical power; a second lens, the second lens having a negative optical power, the object side surface of the second lens being convex near the optical axis, and the image side surface of the second lens being concave near the optical axis; a third lens, the third lens having a positive optical power, the object side surface of the third lens being convex near the optical axis; a fourth lens, the fourth lens having a negative optical power; a fifth lens, the fifth lens having a negative optical power; a sixth lens, the sixth lens having a positive optical power, the image side surface of the sixth lens being convex near the optical axis, both the object side surface and the image side surface of the sixth lens being aspherical surfaces, and at least one of the object side surface and the image side surface of the sixth lens being provided with at least one inflection point; a seventh lens, the seventh lens having a negative optical power, the image side surface of the seventh lens being aspherical; the optical lens satisfies the following relational expressions: -5 < f2 / f1 < 15, and the maximum optical distortion ≤ 10%; wherein, f1 is the focal length of the first lens, and f2 is the focal length of the second lens; 2.5 < tan(HFOV)*TTL / ImgH < 3.5; wherein, tan(HFOV) is the tangent value of half of the maximum field of view angle of the optical lens, 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 ImgH is the radius of the maximum imaging circle of the optical lens.

2. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expression: -15 < f5 / f < 20; wherein, f is the effective focal length of the optical lens, and f5 is the focal length of the fifth lens.

3. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expression: -5 < (f1 + f4) / f < -3; wherein, f1 is the focal length of the first lens, f4 is the focal length of the sixth lens, and f is the effective focal length of the optical lens.

4. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expression: 1.0 < CT3 / (T12 + T23) < 1.8; wherein, CT3 is the thickness of the third lens on the optical axis, T12 is the air gap between the first lens and the second lens on the optical axis, and T23 is the air gap between the second lens and the third lens on the optical axis.

5. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expression: -4 < f12 / f456 < -1.5; wherein, f12 is the combined focal length of the first lens and the second lens, and f456 is the combined focal length of the fourth lens, the fifth lens and the sixth lens.

6. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expression: -6.0 < R12 / R13 < -2.5; Wherein, R12 is the curvature radius of the object side surface of the sixth lens on the optical axis, and R13 is the curvature radius of the image side surface of the sixth lens on the optical axis.

7. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expression: 0 < (R8 + R9) / (R8 - R9) < 2.0; Wherein, R8 is the curvature radius of the object side surface of the fourth lens on the optical axis, and R9 is the curvature radius of the image side surface of the fourth lens on the optical axis.

8. A camera module, characterized in that, the camera module includes: the optical lens according to any one of claims 1-7; and an image sensor, the image sensor is disposed on the image side of the optical lens.

9. An electronic device, characterized in that, comprising: a housing; and the camera module according to claim 8, the camera module is mounted on the housing.

Images