Optical lens, camera module and terminal equipment

Abstract

The invention discloses an optical lens, a camera module and terminal equipment, the optical lens comprises seven lenses with refractive power, and the first lens has refractive power; the second lens element with refractive power has a convex object-side surface. The third lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The fourth lens element has refractive power. The fifth lens element with negative refractive power has a concave object-side surface. The sixth lens element with positive refractive power has a convex object-side surface and a concave image-side surface. The seventh lens element with positive refractive power has a concave image-side surface. The optical lens satisfies the following relational expressions: 2.6 lt; fNOlt, FNOlt; 4, 50 DEG C, 4, 50 DEG C; a FOVlt; and 90 deg. According to the optical lens, the camera module and the terminal equipment, the design requirements of large aperture and macro imaging can be met while the miniaturization design of the optical lens is met.

Description

Technical Field

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

[0002] Users of terminal devices (such as mobile phones, tablets, etc.) have many scenarios for shooting close-up shots, such as shooting fine details of objects, such as skin epidermis, microscopic insects, etc. In such scenarios, optical lenses that can simultaneously meet the requirements of macro and high magnification and are suitable for use in small spaces are very advantageous. However, in order to further miniaturize the camera module, the total length of the optical lens of the camera module is required to be reduced. Therefore, under the requirements of miniaturized design, how to take into account large aperture and macro imaging is an urgent problem to be solved. Summary of the invention

[0003] The present application provides an optical lens, a camera module and a terminal device, which can achieve macro imaging while satisfying the miniaturization design of the optical lens.

[0004] In order to achieve the above-mentioned purpose, in a first aspect, an embodiment of the present application discloses an optical lens, which has seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side along the optical axis;

[0005] The first lens has refractive power;

[0006] The second lens has refractive power, and the object side surface of the second lens is convex at the near optical axis;

[0007] The third lens has positive refractive power, and the object side surface and image side surface of the third lens are both convex surfaces near the optical axis; the fourth lens has refractive power;

[0008] The fifth lens has negative refractive power, and the object side surface of the fifth lens is concave at the near optical axis;

[0009] The sixth lens has positive refractive power, the object side surface of the sixth lens is convex at the near optical axis, and the image side surface of the sixth lens is concave at the near optical axis;

[0010] The seventh lens has negative refractive power, and the image side surface of the seventh lens is concave at the near optical axis;

[0011] The optical lens satisfies the following relationship:

[0012] 2.6 <FNO<4;50deg<FOV<90deg;

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

[0014] In the optical lens provided by the present application, in order to be able to meet the miniaturized design of the optical lens while taking into account large apertures and macro imaging, by reasonably configuring the refractive powers and surface shapes of the seven lenses, the first lens and the second lens have refractive powers, and the object side surface of the second lens is convex near the optical axis, which is beneficial to correcting the aberrations generated by the first lens and the second lens; the third lens has a positive refractive power, and its object side surface and image side surface are convex near the optical axis, which can be beneficial to converging the light incident on the third lens, making the light enter more smoothly; the fourth lens has a refractive power, the fifth lens has a negative refractive power, and with the design that its object side surface is concave near the optical axis, it is beneficial to correcting aberrations; the sixth lens has a positive refractive power, and the object side surface and image side surface of the sixth lens are convex and concave respectively near the optical axis, which can be beneficial to correcting the spherical aberration and astigmatism generated by the previous lenses, thereby being beneficial to improving the imaging quality of the optical lens; the seventh lens has a negative refractive power, and the design that the image side surface of the seventh lens is concave near the optical axis can also correct the aberration of the optical lens, and at the same time can reduce the exit angle of the light, so that the light can be more concentrated on the image sensor of the camera module. At the same time, the design that the object side surface and image side surface of the sixth lens are convex and concave can reduce the total length of the optical lens, thereby realizing the miniaturized design of the optical lens.

[0015] In addition, when the optical lens satisfies the relational expression 50deg < FOV < 90deg, the optical lens can have the characteristics of a large field of view angle, so that the optical lens has high-pixel and high-definition imaging quality.

[0016] Moreover, when the optical lens satisfies the relational expression 2.6 < FNO < 4, the optical lens can have the characteristics of a large aperture, so that the optical lens can have sufficient light input, enabling the optical lens to be applicable to environments such as at night and insufficient light.

[0017] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0018] 9 < TTL / f < 14, and / or, 2 < ImgH / ObjH < 3.5; and / or, 1.5 < TTL / ImgH < 3;

[0019] Wherein, f is the focal length of the optical lens, ObjH is the object height 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 half of the image height corresponding to the maximum field of view angle of the optical lens.

[0020] When the optical lens satisfies the relationship 9 < TTL / f < 14, the total length and refractive power distribution of the optical lens can be reasonably controlled. If the above relationship is less than the lower limit, the total length of the optical lens is too short, which will increase the sensitivity of the optical lens, and then make it difficult to correct the aberration of the optical lens. When the relationship is greater than the upper limit, the total length of the optical lens is too long, which will cause the angle of light entering the image sensor of the imaging module to be too large and unable to match the image sensor, affecting the final imaging.

[0021] When the optical lens satisfies the relationship 2 < ImgH / ObjH < 3.5, the ratio of the image height to the object height of the optical lens can be reasonably controlled, so that the imaging can be clearer.

[0022] In addition, when the optical lens satisfies the relationship 1.5 < TTL / ImgH < 3, it helps to improve the resolution of the optical lens in the full field of view, especially the improvement of the image quality in the edge field of view, thus improving the imaging quality. At the same time, through the limitation of the above relationship, the combination between the lenses of the optical lens can be made more compact, and the miniaturization and thin-and-light design can be realized while meeting the requirements of high pixel and high imaging quality.

[0023] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0024] 20deg / mm < FOV / ImgH < 40deg / mm, and / or, 90deg / mm < FOV / f;

[0025] Wherein, f is the focal length of the optical lens, and FOV is the maximum field of view angle of the optical lens.

[0026] When the optical lens satisfies the relationship 20deg / mm < FOV / ImgH < 40deg / mm, it is beneficial to realize the miniaturization and wide-angle characteristics of the optical lens, and at the same time, it can match a higher pixel image sensor to achieve high-definition shooting.

[0027] When the optical lens satisfies the relationship 90deg / mm < FOV / f, the field of view angle of the optical lens is relatively large. Thus, while effectively increasing the view-finding area of the picture, it also has a certain macro ability, improving the ability of the optical lens to capture low-frequency details and meeting the design requirements of high image quality.

[0028] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0029] 0.3 < NA < 0.6, and / or, 0.2mm < u < 1mm;

[0030] Wherein, NA is the object space numerical aperture of the optical lens, FNO is the f-number of the optical lens, and u is the object distance of the optical lens.

[0031] When the optical lens satisfies 0.3 < NA < 0.6, the characteristics of a large aperture of the optical lens can be ensured, enabling the optical lens to have sufficient light input, making the captured image clearer, and achieving high-quality shooting in an object space scene with low light brightness.

[0032] When the optical lens satisfies the relational expression 0.2 mm < u < 1 mm, the optical lens can achieve the function of ultra-macro shooting, and can better display the details of tiny objects.

[0033] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0034] 2 < f3 / f; and / or, 2 < f4 / f; and / or, f5 / f < -2; and / or, 2 < f6 / f < 6; and / or, -5 < f7 / f < -1.5; and / or, 0.65 < f3 / n3 < 1.65;

[0035] Wherein, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, f is the focal length of the optical lens, and n3 is the refractive index of the third lens.

[0036] When the optical lens satisfies the relational expression 2 < f3 / f, the third lens provides positive refractive power for the optical lens. Therefore, by controlling the ratio of the focal length of the third lens to the focal length of the optical lens, the optical power of the third lens can be controlled within a reasonable range, thereby reducing the aberration generated by the front lens group (i.e., the first lens and the second lens), and further facilitating the improvement of the imaging quality of the optical lens.

[0037] When the optical lens satisfies the relational expression 2 < f4 / f, the fourth lens can provide a part of positive refractive power or negative refractive power, thereby adjusting the overall refractive power of the optical lens, forming a quasi-symmetric structure with the first lens, the second lens, and the third lens, and further balancing the distortion generated by the front lens group (i.e., the first lens to the third lens), and avoiding high-order aberrations caused by too large refractive index.

[0038] When the optical lens satisfies the relational expression f5 / f < -2, the negative refractive power provided by the fifth lens is reasonable, which is beneficial to correcting the aberration of the optical lens and improving the imaging quality of the optical lens.

[0039] When the optical lens satisfies the relational expression 2 < f6 / f < 6, the spherical aberration and coma contributions of the sixth lens can be reasonably distributed, so that the optical lens has good imaging quality in the axial region.

[0040] When the optical lens satisfies the relationship -5 < f7 / f < -1.5, it can reduce the deflection angle of the light in the seventh lens, lower the sensitivity of the seventh lens, and can also reduce aberrations such as astigmatism and distortion generated by the lens group in front of the seventh lens, thereby being beneficial to improving the imaging quality of the optical lens.

[0041] When the optical lens satisfies the relationship 0.65 < f3 / n3 < 1.65, it can enable a reasonable distribution of the refractive power between the third lens and other lenses, so that the optical lens supports aberration balance and image quality improvement under different materials, and also makes it easy to compress the air gap between the first lens and the third lens, improving the assembly compactness of the optical lens and avoiding the influence of stray light.

[0042] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationships:

[0043] 2 < R3 / f; and / or, 1.5 < R5 / f; and / or, R6 / f < -2; and / or, R9 / f < -1.2; and / or, 0.9 < R11 / f < 1.5; and / or, 1.2 < R12 / f < 2;

[0044] Wherein, R3 is the curvature radius of the object side surface of the second lens on the optical axis, R5 is the curvature radius of the object side surface of the third lens on the optical axis, R6 is the curvature radius of the image side surface of the third lens on the optical axis, R9 is the curvature radius of the object side surface of the fifth lens on the optical axis, R11 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 object side surface of the seventh lens on the optical axis.

[0045] When the optical lens satisfies the relationship 2 < R3 / f, it can effectively control the curvature radius of the object side surface of the second lens on the optical axis, thereby effectively balancing the low-order aberrations of the optical lens and enabling the optical lens to have good imaging quality.

[0046] When the optical lens satisfies the relationship 1.5 < R5 / f, it can keep the astigmatism of the third lens within a reasonable range and can effectively balance the astigmatism generated by the front lenses, thereby enabling the optical lens to have good imaging quality.

[0047] When the optical lens satisfies the relationship R6 / f < -2, it can effectively control the curvature radius of the image side surface of the third lens on the optical axis, thereby effectively balancing the astigmatism generated by the front lenses and enabling the optical lens to have good imaging quality.

[0048] When the optical lens satisfies the relation R9 / f < -1.2, the deflection angle of light in the fifth lens can be reduced, thereby reducing the sensitivity of the fifth lens, controlling the astigmatism of the fifth lens within a reasonable range, and further enabling the optical lens to have good imaging quality.

[0049] When the optical lens satisfies the relation 0.9 < R11 / f < 1.5, the curvature radius of the object side of the sixth lens near the optical axis can be effectively controlled, thereby effectively balancing the spherical aberration and coma generated by the lenses in front of the sixth lens, which is beneficial to improving the imaging quality of the optical lens.

[0050] When the optical lens satisfies the relation 1.2 < R12 / f < 2, the curvature radius of the image side of the sixth lens near the optical axis can be effectively controlled, thereby effectively balancing the spherical aberration and coma generated by the lenses in front of the sixth lens, which is beneficial to improving the imaging quality of the optical lens.

[0051] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relations:

[0052] 0.2 < CT1 / CT2; and / or, 1 < CT3 / CT4 < 3.4; and / or, 0.7 < CT3 / CT5 < 3.2; and / or, 0.9 < CT3 / CT2 < 3.2; and / or, 0.4 < CT3 / CT1 < 3.1; and / or, 0.9 < AT67 / (CT6 + CT7) < 1.9; and / or, 1.2 < TD / (CT1 + CT2 + CT3 + CT4 + CT5) < 2.7;

[0053] Wherein, CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, AT67 is the distance on the optical axis from the image side of the sixth lens to the object side of the seventh lens, and TD is the distance on the optical axis from the object side of the first lens to the image side of the seventh lens.

[0054] The optical lens 100 satisfies the relation 0.2 < CT1 / CT2. In this way, the thickness and refractive power of the first lens and the second lens can be optimized, thereby avoiding the situation of excessive spherical aberration generated by the front lens group, which is beneficial to improving the overall resolution of the optical lens and reducing the thickness sensitivity of the optical lens.

[0055] The optical lens satisfies the relationship 1 < CT3 / CT4 < 3.4. In this way, the thickness of the third lens is greater than that of the fourth lens, so that the third lens and the fourth lens can have better thickness uniformity, reducing the sensitivity of the optical lens to thickness, and at the same time, it is also beneficial to balance the field curvature of the optical lens.

[0056] When the optical lens satisfies the relationship 0.7 < CT3 / CT5 < 3.2, the third lens and the fifth lens can also have better thickness uniformity, reducing the sensitivity of the optical lens to thickness, and at the same time, it is also beneficial to balance the field curvature of the optical lens.

[0057] When the optical lens satisfies the relationship 0.9 < CT3 / CT2 < 3.2, the thickness ratio of the third lens and the second lens can be within a reasonable range, reducing the thickness sensitivity of the optical lens, and at the same time, it is beneficial to balance the field curvature of the optical lens.

[0058] When the optical lens satisfies the relationship 0.4 < CT3 / CT1 < 3.1, the ratio of the central thickness of the third lens to the central thickness of the first lens can be within a certain range, which is beneficial to ensure that the optical lens has good uniformity, and at the same time, it reduces the sensitivity of the optical lens thickness, and further is beneficial to balance the field curvature of the optical lens.

[0059] Since the rationality of the thickness and the gap is directly related to the difficulty of lens forming and manufacturing, when the optical lens satisfies the relationship 0.9 < AT67 / (CT6 + CT7) < 1.9, the thicknesses of the sixth lens and the seventh lens can be appropriate, and at the same time, the distance between the sixth lens and the seventh lens is also reasonable, thus effectively improving the structural compactness of the optical lens, and further being beneficial to the forming and assembling of the sixth lens and the seventh lens.

[0060] When the optical lens satisfies the relationship 1.2 < TD / (CT1 + CT2 + CT3 + CT4 + CT5) < 2.7, the thickness values of the first lens to the fifth lens can be reasonably configured, so as to optimize the sizes and refractive powers of the first lens to the fifth lens, avoid excessive spherical aberration generated by the lens group, reduce the sensitivity of the lens group, and further be beneficial to improving the imaging quality of the optical lens.

[0061] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationships:

[0062] 0.9 < ET7 / CT7 < 2.7; and / or, -1.9 < SAG13 / CT7 < -0.6; and / or, 2.3 < (|f1| + |f2|) / |f7| < 6;

[0063] Wherein, ET7 is the distance from the maximum effective semi-aperture of the object side of the seventh lens to the maximum effective semi-aperture of the image side of the seventh lens (i.e., the edge thickness of the seventh lens), CT7 is the distance of the seventh lens on the optical axis, SAG13 is the distance from the maximum effective semi-aperture of the object side of the seventh lens to the intersection of the object side of the seventh lens and the optical axis in the optical axis direction (i.e., the sagittal height of the seventh lens), f1 is the focal length of the first lens, f2 is the focal length of the second lens, and f7 is the focal length of the seventh lens.

[0064] When the optical lens satisfies the relational expression 0.9 < ET7 / CT7 < 2.7, the edge thickness and the centroid thickness of the seventh lens can be kept within a reasonable range, so that the seventh lens can have good optical performance and molding yield, and at the same time, good assembly stability of the seventh lens can be ensured.

[0065] When the optical lens satisfies the relational expression -1.9 < SAG13 / CT7 < -0.6, the surface shape and thickness of the seventh lens can be reasonable, so that the seventh lens can have good optical performance and molding yield, and at the same time, good assembly stability of the seventh lens can be ensured.

[0066] When the optical lens satisfies the relational expression 2.3 < (|f1| + |f2|) / |f7| < 6, the spherical aberration contributions of the first lens, the second lens and the seventh lens can be reasonably distributed, so that the optical lens has good imaging quality.

[0067] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0068] 0.2 < CT1 / SD1 < 2; and / or, 0.7 < SD10 / SD1 < 2.7; and / or, 2 < SD14 / SD1 < 6; and / or, 3 < ImgH / SD1 < 6;

[0069] Wherein, CT1 is the thickness of the first lens on the optical axis, SD1 is the maximum effective semi-aperture of the object side of the first lens, SD10 is the maximum effective semi-aperture of the image side of the fifth lens, and SD14 is the maximum effective semi-aperture of the image side of the seventh lens.

[0070] When the optical lens satisfies the relational expression 0.2 < CT1 / SD1 < 2, the first lens can have good optical performance and molding yield, and at the same time, good assembly stability is satisfied.

[0071] When the optical lens satisfies the relational expression 0.7 < SD10 / SD1 < 2.7, the light can be better guided into the fifth lens, which is beneficial to improving the imaging quality of the optical lens.

[0072] When the optical lens satisfies the relationship 2 < SD14 / SD1 < 6, the deflection angle of the light rays in the marginal field of view entering the image sensor can be effectively reduced, the matching degree between the optical lens and the image sensor can be increased, the astigmatism in the off-axis field of view can be improved at the same time, and the overall image quality can be enhanced.

[0073] When the optical lens satisfies the relationship 3 < ImgH / SD1 < 6, the sensitivity of the optical lens can be effectively guaranteed, and the imaging quality of the optical lens can be ensured.

[0074] In a second aspect, the present application discloses an imaging module, which includes an image sensor and the optical lens as described in the first aspect above, and the image sensor is disposed on the image side of the optical lens.

[0075] In a third aspect, the present application discloses a terminal device, which includes a housing and the imaging module as described in the second aspect above, and the imaging module is disposed in the housing.

[0076] Compared with the related art, the beneficial effects of the present application are as follows:

[0077] In the optical lens provided by the present application, in order to be able to take into account macro imaging while meeting the miniaturized design of the optical lens, by reasonably configuring the refractive power and surface shape of the seven lenses, the first lens and the second lens have refractive power, and the object side surface of the second lens is convex at the near optical axis, which is beneficial to correcting the aberration generated by the first lens and the second lens; the third lens has positive refractive power, and its object side surface and image side surface are convex at the near optical axis, which can be beneficial to converging the light rays incident on the third lens, making the light rays enter more gently; the fourth lens has refractive power, the fifth lens has negative refractive power, and with the design that its object side surface is concave at the near optical axis, it is beneficial to correct the aberration; the sixth lens has positive refractive power, and the design that the object side surface and the image side surface of the sixth lens are convex and concave respectively at the near optical axis can be beneficial to correcting the spherical aberration and astigmatism generated by the previous lenses, thereby being beneficial to improving the imaging quality of the optical lens; the seventh lens has negative refractive power, and the design that the image side surface of the seventh lens is concave at the near optical axis can also correct the aberration of the optical lens, and at the same time can reduce the exit angle of the light rays, so that the light rays can be more concentrated on the image sensor of the imaging module. At the same time, the design that the object side surface and the image side surface of the sixth lens are convex and concave can reduce the total length of the optical lens, thereby realizing the miniaturized design of the optical lens.

[0078] In addition, when the optical lens satisfies the relationship 50deg < FOV < 90deg, the optical lens can have the characteristics of a large field of view angle, so that the optical lens has an imaging quality with high pixels and high definition.

[0079] In addition, when the optical lens satisfies the relationship 2.6 < FNO < 4, the optical lens can have the characteristic of a large aperture, so that the optical lens can have sufficient light input, enabling the optical lens to be applicable to environments such as dark nights and insufficient light. Brief Description of the Drawings

[0080] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0081] Figure 1 is a schematic structural diagram of the optical lens disclosed in the first embodiment of the present application;

[0082] Figure 2 is the spherical aberration diagram, astigmatism curve diagram and distortion curve diagram of the optical lens disclosed in the first embodiment of the present application;

[0083] Figure 3 is a schematic structural diagram of the optical lens disclosed in the second embodiment of the present application;

[0084] Figure 4 is the spherical aberration diagram, astigmatism curve diagram and distortion curve diagram of the optical lens disclosed in the second embodiment of the present application;

[0085] Figure 5 is a schematic structural diagram of the optical lens disclosed in the third embodiment of the present application;

[0086] Figure 6 is the spherical aberration diagram, astigmatism curve diagram and distortion curve diagram of the optical lens disclosed in the third embodiment of the present application;

[0087] Figure 7 is a schematic structural diagram of the optical lens disclosed in the fourth embodiment of the present application;

[0088] Figure 8 is the spherical aberration diagram, astigmatism curve diagram and distortion curve diagram of the optical lens disclosed in the fourth embodiment of the present application;

[0089] Fig. 9 is a schematic structural diagram of the optical lens disclosed in the fifth embodiment of the present application;

[0090] Fig.10 is the spherical aberration diagram, astigmatism curve diagram and distortion curve diagram of the optical lens disclosed in the fifth embodiment of the present application;

[0091] Fig.11 is a schematic structural diagram of the optical lens disclosed in the sixth embodiment of the present application;

[0092] Fig.12 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the sixth embodiment of the present application;

[0093] Fig.13 It is a structural schematic diagram of the camera module disclosed in this application;

[0094] Fig.14 It is a structural schematic diagram when the terminal device disclosed in this application is a mobile phone. DETAILED DESCRIPTION

[0095] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0096] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0097] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0098] See also Figure 1 The present application discloses an optical lens 100, which includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7, which are arranged in sequence from the object side to the image side along the optical axis. Among them, the first lens L1 has negative refractive power or positive refractive power, the second lens L2 has negative refractive power or positive refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power or 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. When imaging, light enters 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 in sequence from the object side of the first lens L1, and finally forms an image on the imaging surface 101 of the optical lens 100.

[0099] Further, the object-side surface S1 of the first lens L1 is convex or concave at the near optical axis, and the image-side surface S2 of the first lens L1 is convex or concave at the near optical axis; the object-side surface S3 of the second lens L2 is convex at the near optical axis, and the image-side surface S4 of the second lens L2 is convex or concave at the near optical axis; the object-side surface S5 of the third lens L3 is convex at the near optical axis, and the image-side surface S6 of the third lens L3 is convex at the near optical axis; the object-side surface S7 of the fourth lens L4 may be convex or concave at the near optical axis. The image-side surface S8 of the fourth lens L4 can be convex or concave at the near optical axis; the object-side surface S9 of the fifth lens L5 is concave at the near optical axis, and the image-side surface S10 of the fifth lens L5 is convex or concave at the near optical axis; the object-side surface S11 of the sixth lens L6 is convex at the near optical axis, and the image-side surface S12 of the sixth lens L6 is concave at the near optical axis; the object-side surface S13 of the seventh lens L7 is convex or concave at the near optical axis, and the image-side surface S14 of the seventh lens L7 is concave at the near optical axis.

[0100] Optionally, all of the seven lenses may be plastic lenses, so that the optical lens 100 is relatively light and convenient for processing complex surfaces. Alternatively, all of the seven lenses may be glass lenses, or some of the lenses may be plastic lenses and some of the lenses may be glass lenses.

[0101] Optionally, the first lens L1 to the seventh lens L7 may all be aspherical lenses, or the first lens L1 to the seventh lens L7 may all be spherical lenses.

[0102] In some embodiments, the optical lens 100 further includes an aperture STO, and the aperture STO can be disposed between any two lenses. For example, the aperture STO can be disposed between the first lens L1 and the second lens L2, or the aperture STO can also be disposed between the second lens L2 and the third lens L3.

[0103] In some embodiments, the optical lens 100 further includes a filter 110 disposed between the image side S14 of the seventh lens L7 and the imaging surface 101 of the optical lens 100. In this embodiment, the filter 110 can be an infrared cut-off filter 110, which can filter out light in other bands such as infrared light and only allow visible light to pass through, making the imaging more in line with the visual experience of the human eye. Of course, the filter 110 can also be an infrared band-pass filter 110, which can filter out light in other bands such as visible light and only allow infrared light to pass through. By filtering out light in other bands such as visible light, the imaging quality can be improved; and the optical lens 100 can be used as an infrared optical lens 100, that is, the optical lens 100 can also image and obtain good image effects in dim environments and other special application scenarios. Preferably, the filter 110 can be made of glass. Of course, in other embodiments, the filter 110 can also be made of optical glass coating or filters 110 of other materials, which can be selected according to actual needs and are not specifically limited in this embodiment.

[0104] In some embodiments, the optical lens 100 further includes a flat glass 120 disposed between the object side of the optical lens 100 and the object side surface S1 of the first lens L1.

[0105] In some embodiments, the optical lens 100 satisfies the relationship 1.5 < TTL / ImgH < 3, which helps to improve the resolution of the optical lens 100 in the full field of view, especially the image quality of the edge field of view, thereby improving the imaging quality. At the same time, through the limitation of the above relationship, the combination between the lenses of the optical lens 100 can be made more compact, and under the condition of meeting high pixels and high imaging quality, a miniaturized and thin design can be achieved. Optionally, the relationship can further satisfy 1.8 < TTL / ImgH < 2.8, which is more beneficial to the miniaturized and thin design of the optical lens 100.

[0106] In some embodiments, the optical lens 100 satisfies the relationship 9 < TTL / f < 14, which can reasonably control the total length of the optical lens 100 and the distribution of refractive power. If the above relationship is less than the lower limit, the total length of the optical lens 100 is too short, which will increase the sensitivity of the optical lens 100 and make it difficult to correct the aberration of the optical lens 100. When the relationship is greater than the upper limit, the total length of the optical lens 100 is too long, which will cause the angle of light entering the image sensor of the camera module to be too large and unable to match the image sensor, affecting the final imaging.

[0107] In some embodiments, the optical lens 100 satisfies the relation 2 < ImgH / ObjH < 3.5, which can reasonably control the ratio of the image height to the object height of the optical lens 100, thereby enabling clearer imaging. Optionally, this relation can further satisfy 2.3 < ImgH / ObjH < 3, so that the imaging quality of the optical lens 100 is higher.

[0108] In some embodiments, when the optical lens 100 satisfies the relation 50deg < FOV < 90deg, the optical lens 100 can have the characteristic of a large field of view angle, so that the optical lens 100 has an imaging quality with high pixels and high definition.

[0109] In some embodiments, when the optical lens 100 satisfies the relation 20deg / mm < FOV / ImgH < 40deg / mm, it is beneficial to realize the miniaturization and wide-angle characteristics of the optical lens 100. At the same time, it can match an image sensor with higher pixels to achieve high-definition shooting. Optionally, this relation can further satisfy 21deg / mm < FOV / ImgH < 38deg / mm to further realize the high-definition shooting of the optical lens 100.

[0110] In some embodiments, when the optical lens 100 satisfies the relation 90deg / mm < FOV / f, the field of view angle of the optical lens 100 is relatively large. Thus, while effectively increasing the view-finding area of the picture, it also has a certain macro ability, improving the ability of the optical lens 100 to capture low-frequency details and meeting the design requirements of high image quality. Optionally, this relation can further satisfy 100deg / mm < FOV / f < 250deg / mm, so that the imaging quality of the optical lens 100 is better.

[0111] In some embodiments, when the optical lens 100 satisfies 0.3 < NA < 0.6, it can ensure that the optical lens 100 has the characteristic of a large aperture, allowing the optical lens 100 to have sufficient light input, making the captured image clearer, and realizing high-quality shooting in a physical space scene with low light brightness. Optionally, this relation can further satisfy 0.35 < NA < 0.5, so that the large-aperture characteristic of the optical lens 100 is more prominent, which is more conducive to shooting in low-light environments.

[0112] In some embodiments, when the optical lens 100 satisfies the relation 2.6 < FNO < 4, the optical lens 100 can have the characteristic of a large aperture, so that the optical lens 100 can have sufficient light input, enabling the optical lens 100 to be applicable to environments such as at night and insufficient light. Optionally, this relation can further satisfy 2.8 < FNO < 3.5, so that the large-aperture characteristic of the optical lens 100 is more prominent, which is more conducive to shooting in the dark environment.

[0113] In some embodiments, when the optical lens 100 satisfies the relationship 0.35 mm < u < 0.85 mm, the optical lens 100 can achieve a super-macro imaging function, and can better show the details of minute objects. Optionally, the relationship can further satisfy 0.35 mm < u < 0.85 mm. Thus, the optical lens has a better ability to show the details of minute objects.

[0114] In some embodiments, the optical lens 100 satisfies the relationship 2.5 < |f1| / f < 10. Wherein, f1 is the focal length of the first lens L1. When the optical lens 100 satisfies the relationship 2.5 < |f1| / f < 10, the optical power of the first lens L1 is not too strong, and can correct the high-order spherical aberration, so that the optical lens 100 has good imaging quality.

[0115] In some embodiments, the optical lens 100 satisfies the relationship 3 < |f2| / f < 8. Wherein, f2 is the focal length of the second lens L2. When the optical lens 100 satisfies the relationship 3 < |f2| / f < 8, the optical power of the second lens L2 is not too strong, and can correct the high-order spherical aberration, so that the optical lens 100 has good imaging quality.

[0116] In some embodiments, when the optical lens 100 satisfies the relationship 2 < f3 / f, the third lens L3 provides positive refractive power for the optical lens 100. Therefore, by controlling the ratio of the focal length of the third lens L3 to the focal length of the optical lens 100, the optical power of the third lens L3 can be controlled within a reasonable range, thereby reducing the aberration generated by the front lens group (i.e., the first lens L1 and the second lens L2), and further facilitating the improvement of the imaging quality of the optical lens 100. Optionally, the relationship can further satisfy 2.3 < f3 / f < 6, which is further beneficial to the high-quality imaging of the optical lens 100.

[0117] In some embodiments, when the optical lens 100 satisfies the relationship 2 < f4 / f, the fourth lens L4 can provide a part of positive refractive power or negative refractive power, thereby adjusting the overall refractive power of the optical lens 100, and forming a quasi-symmetrical structure with the first lens L1, the second lens L2, and the third lens L3. Furthermore, the distortion generated by the front lens group (i.e., the first lens L1 to the third lens L3) can be balanced, and the high-order aberration caused by too large refractive index can be avoided. Optionally, the relationship can further satisfy 3 < f4 / f < 12, and the aberration correction ability of the optical lens is better.

[0118] In some embodiments, when the optical lens 100 satisfies the relationship f5 / f < -2, the negative refractive power provided by the fifth lens L5 is reasonable, which is beneficial to correcting the aberration of the optical lens 100 and improving the imaging quality of the optical lens 100. Optionally, the relationship can further satisfy -11 < f5 / f < -3, so that the imaging quality of the optical lens 100 is higher.

[0119] In some embodiments, when the optical lens 100 satisfies the relational expression 2 < f6 / f < 6, the spherical aberration and coma contributions of the sixth lens L6 can be reasonably allocated, so that the on-axis region of the optical lens 100 has good imaging quality.

[0120] In some embodiments, when the optical lens 100 satisfies the relational expression -5 < f7 / f < -1.5, the deflection angle of the light rays in the seventh lens L7 can be reduced, the sensitivity of the seventh lens L7 can be lowered, and the aberrations such as astigmatism and distortion generated by the lens group in front of the seventh lens L7 can also be reduced, thereby facilitating the improvement of the imaging quality of the optical lens 100. Optionally, the relational expression can further satisfy -4 < f7 / f < -2, so that the imaging quality of the optical lens is higher.

[0121] In some embodiments, when the optical lens 100 satisfies the relational expression 0.65 < f3 / n3 < 1.65, the refractive power of the third lens L3 and other lenses can be reasonably allocated, so that the optical lens 100 supports aberration balance and image quality improvement under different materials, and also makes it easy to compress the air gap between the first lens L1 and the third lens L3, improves the assembly compactness of the optical lens 100, and avoids the influence of stray light. Optionally, the relational expression can further satisfy 0.75 < f3 / n3 < 1.5, which is further beneficial to the assembly compactness of the optical lens.

[0122] In some embodiments, when the optical lens 100 satisfies the relational expression 4 < |R1| / f, the curvature radius of the object side surface S1 of the first lens L1 at the optical axis can be effectively controlled, so that the low-order aberrations of the optical lens 100 can be effectively balanced, and the optical lens 100 has good imaging quality.

[0123] In some embodiments, when the optical lens 100 satisfies the relational expression 1 < |R2| / f, the curvature radius of the image side surface S2 of the first lens L1 at the optical axis can be effectively controlled, so that the low-order aberrations of the optical lens 100 can be effectively balanced, and the optical lens 100 has good imaging quality.

[0124] In some embodiments, when the optical lens 100 satisfies the relational expression 2 < R3 / f, the curvature radius of the object side surface S3 of the second lens L2 at the optical axis can be effectively controlled, so that the low-order aberrations of the optical lens 100 can be effectively balanced, and the optical lens 100 has good imaging quality. Optionally, the relational expression can further satisfy 3 < R3 / f < 7, and the optical lens 100 has better low-order aberration balancing ability.

[0125] In some embodiments, when the optical lens 100 satisfies the relational expression 1.5 < |R4| / f < 4, the curvature radius of the object side surface S3 of the second lens L2 at the optical axis can be effectively controlled, thereby effectively balancing the low-order aberrations of the optical lens 100, so that the optical lens 100 has good imaging quality.

[0126] In some embodiments, when the optical lens 100 satisfies the relational expression 1.5 < R5 / f, the astigmatism of the third lens L3 can be within a reasonable range, and the astigmatism generated by the front lens can be effectively balanced, so that the optical lens 100 has good imaging quality.

[0127] In some embodiments, when the optical lens 100 satisfies the relational expression R6 / f < -2, the curvature radius of the image side surface S6 of the third lens L3 at the optical axis can be effectively controlled, thereby effectively balancing the astigmatism generated by the front lens, so that the optical lens 100 has good imaging quality. Optionally, the relational expression can further satisfy -9 < R6 / f < -2.5, and the imaging quality of the optical lens 100 is higher.

[0128] In some embodiments, when the optical lens 100 satisfies the relational expression 3 < |R7| / f < 15, the curvature radius of the object side surface S7 of the fourth lens L4 at the optical axis can be effectively controlled, thereby effectively balancing the astigmatism generated by the front lens, so that the optical lens 100 has good imaging quality.

[0129] In some embodiments, when the optical lens 100 satisfies the relational expression 2.8 < |R8| / f, the curvature radius of the image side surface S8 of the fourth lens L4 at the optical axis can be effectively controlled, thereby effectively balancing the astigmatism generated by the front lens, so that the optical lens 100 has good imaging quality.

[0130] In some embodiments, when the optical lens 100 satisfies the relational expression R9 / f < -1.2, the deflection angle of light in the fifth lens L5 can be reduced, thereby reducing the sensitivity of the fifth lens L5, so that the astigmatism of the fifth lens L5 is controlled within a reasonable range, and further enabling the optical lens 100 to have good imaging quality. Optionally, the relational expression can further satisfy R9 / f < -1.4, and the imaging quality of the optical lens 100 is higher.

[0131] In some embodiments, when the optical lens 100 satisfies the relational expression < |R10| / f, the deflection angle of light in the fifth lens L5 can be reduced, thereby reducing the sensitivity of the fifth lens L5, so that the astigmatism of the fifth lens L5 is controlled within a reasonable range, and further enabling the optical lens 100 to have good imaging quality.

[0132] In some embodiments, when the optical lens 100 satisfies the relation 0.9 < R11 / f < 1.5, the curvature radius of the object side S11 of the sixth lens L6 at the near optical axis can be effectively controlled, so as to effectively balance the spherical aberration and coma generated by the lenses in front of the sixth lens L6, which is beneficial to improving the imaging quality of the optical lens 100.

[0133] In some embodiments, when the optical lens 100 satisfies the relation 1.2 < R12 / f < 2, the curvature radius of the image side S12 of the sixth lens L6 at the near optical axis can be effectively controlled, so as to effectively balance the spherical aberration and coma generated by the lenses in front of the sixth lens L6, which is beneficial to improving the imaging quality of the optical lens 100.

[0134] In some embodiments, when the optical lens 100 satisfies the relation 9 < |R13| / f, the curvature radius of the object side S13 of the seventh lens L7 at the near optical axis can be effectively controlled, so that the astigmatism of the seventh lens L7 is within a reasonable range, and then the astigmatism generated by the lenses in front of the seventh lens L7 is effectively balanced, which is beneficial to improving the imaging quality of the optical lens 100.

[0135] In some embodiments, when the optical lens 100 satisfies the relation 1.1 < R14 / f < 2.3, the curvature radius of the image side S14 of the seventh lens L7 at the near optical axis can be effectively controlled, so that the astigmatism of the seventh lens L7 is within a reasonable range, and then the astigmatism generated by the lenses in front of the seventh lens L7 is effectively balanced.

[0136] In some embodiments, the optical lens 100 satisfies the relation 0.2 < CT1 / CT2. In this way, the thickness and refractive power of the first lens L1 and the second lens L2 can be optimized, so as to avoid the situation that the spherical aberration generated by the front lens group is too large, which is beneficial to improving the overall resolution of the optical lens 100 and reducing the thickness sensitivity of the optical lens 100. Optionally, the relation can further satisfy 0.3 < CT1 / CT2 < 6, so that the overall resolution of the optical lens is better.

[0137] In some embodiments, the optical lens 100 satisfies the relation 1 < CT3 / CT4 < 3.4. In this way, the thickness of the third lens L3 is greater than that of the fourth lens L4, so that the third lens L3 and the fourth lens L4 can have better thickness uniformity. While reducing the sensitivity of the optical lens 100 to thickness, it can also be beneficial to balance the field curvature of the optical lens 100. Optionally, the relation can further satisfy 1.1 < CT3 / CT4 < 3.2, so that the field curvature balance ability of the optical lens is better.

[0138] In some embodiments, when the optical lens 100 satisfies the relation 0.7 < CT3 / CT5 < 3.2, the third lens L3 and the fifth lens L5 can also have good thickness uniformity. While reducing the sensitivity of the optical lens 100 to thickness, it is also beneficial to balance the field curvature of the optical lens 100. Optionally, the relation can further satisfy 0.8 < CT3 / CT5 < 2.9, so that the field curvature balancing ability of the optical lens is better.

[0139] In some embodiments, when the optical lens 100 satisfies the relation 0.9 < CT3 / CT2 < 3.2, the thickness ratio of the third lens L3 and the second lens L2 can be within a reasonable range, reducing the thickness sensitivity of the optical lens 100 and being beneficial to balancing the field curvature of the optical lens 100 at the same time. Optionally, the relation can further satisfy 1 < CT3 / CT2 < 2.9, so that the field curvature balancing ability of the optical lens is better.

[0140] In some embodiments, when the optical lens 100 satisfies the relation 0.4 < CT3 / CT1 < 3.1, the ratio of the central thickness of the third lens L3 to the central thickness of the first lens L1 can be within a certain range, which is beneficial to ensuring that the optical lens 100 has good uniformity, reducing the sensitivity of the thickness of the optical lens 100, and further being beneficial to balancing the field curvature of the optical lens 100, so that the field curvature balancing ability of the optical lens is better.

[0141] In some embodiments, since the rationality of thickness and gap is directly related to the difficulty of lens forming and manufacturing, when the optical lens 100 satisfies the relation 0.9 < AT67 / (CT6 + CT7) < 1.9, the thicknesses of the sixth lens L6 and the seventh lens L7 can be appropriate, and the distance between the sixth lens L6 and the seventh lens L7 is also reasonable, thus effectively improving the structural compactness of the optical lens 100 and being further beneficial to the forming and assembling of the sixth lens L6 and the seventh lens L7. Optionally, the relation can further satisfy 1.1 < AT67 / (CT6 + CT7) < 1.7, which is further beneficial to the assembling of the sixth lens L6 and the seventh lens L7.

[0142] In some embodiments, when the optical lens 100 satisfies the relation 1.2 < TD / (CT1 + CT2 + CT3 + CT4 + CT5) < 2.7, the thickness values of the first lens L1 to the fifth lens L5 can be reasonably configured, so as to optimize the sizes and refractive powers of the first lens L1 to the fifth lens L5, avoid excessive spherical aberration generated by the lens group, reduce the sensitivity of the lens group, and further be beneficial to improving the imaging quality of the optical lens 100. Optionally, the relation can further satisfy 1.5 < TD / (CT1 + CT2 + CT3 + CT4 + CT5) < 2.4, so as to be further beneficial to improving the imaging quality of the optical lens 100.

[0143] In some embodiments, when the optical lens 100 satisfies the relational expression 0.9 < ET7 / CT7 < 2.7, the edge thickness and the centroid thickness of the seventh lens L7 can be maintained within a reasonable range, so that the seventh lens L7 can have good optical performance and molding yield, and at the same time, good assembly stability of the seventh lens L7 can be ensured. Optionally, the relational expression can further satisfy 1 < ET7 / CT7 < 2.5, and the assembly stability of the seventh lens L7 is better.

[0144] In some embodiments, when the optical lens 100 satisfies the relational expression -1.9 < SAG13 / CT7 < -0.6, the surface shape and thickness of the seventh lens L7 can be reasonable, so that the seventh lens L7 can have good optical performance and molding yield, and at the same time, good assembly stability of the seventh lens L7 can be ensured. Optionally, the relational expression can further satisfy -1.7 < SAG13 / CT7 < -0.7, and the assembly stability of the seventh lens L7 is better.

[0145] In some embodiments, when the optical lens 100 satisfies the relational expression 2.3 < (|f1| + |f2|) / |f7| < 6, the spherical aberration contributions of the first lens L1, the second lens L2, and the seventh lens L7 can be reasonably distributed, so that the optical lens 100 has good imaging quality. Optionally, the relational expression can further satisfy 2.7 < (|f1| + |f2|) / |f7| < 5, so that the imaging quality of the optical lens is better.

[0146] In some embodiments, when the optical lens 100 satisfies the relational expression 0.2 < CT1 / SD1 < 2, the first lens L1 can have good optical performance and molding yield, and at the same time, good assembly stability is satisfied. Optionally, the relational expression can further satisfy 0.27 < CT1 / SD1 < 1.8, which is beneficial to improving the assembly stability of the optical lens.

[0147] When the optical lens 100 satisfies the relational expression 0.7 < SD10 / SD1 < 2.7, the light can be better guided into the fifth lens L5, which is beneficial to improving the imaging quality of the optical lens 100. Optionally, the relational expression can further satisfy 0.8 < SD10 / SD1 < 2.3, which is beneficial to the improvement of the imaging quality of the optical lens.

[0148] In some embodiments, when the optical lens 100 satisfies the relational expression 2 < SD14 / SD1 < 6, the deflection angle of the marginal field light entering the image sensor can be effectively reduced, the matching degree between the optical lens 100 and the image sensor can be increased, and at the same time, the off-axis field astigmatism can be improved, and the overall image quality can be enhanced. Optionally, the relational expression can further satisfy 2.5 < SD14 / SD1 < 5.3, which is beneficial to the high-quality imaging of the optical lens.

[0149] In some embodiments, when the optical lens 100 satisfies the relationship 3 < ImgH / SD1 < 6, the sensitivity of the optical lens 100 can be effectively guaranteed, and the imaging quality of the optical lens 100 can be ensured. Optionally, the relationship can further satisfy 3.2 < ImgH / SD1 < 5.8, so that the imaging quality of the optical lens is better.

[0150] The optical lens 100 of this embodiment will be described in detail below in combination with specific parameters.

[0151] First Embodiment

[0152] The structural schematic diagram of the optical lens 100 disclosed in the first embodiment of the present application is as Figure 1 shown. The optical lens 100 includes a flat glass 120, a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter 110, which are sequentially arranged along the optical axis from the object side to the image side.

[0153] In this embodiment, the first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a negative refractive power, the sixth lens L6 has a positive refractive power, and the seventh lens L7 has a negative refractive power.

[0154] Further, the object side S1 and the image side S2 of the first lens L1 are both convex near the optical axis; the object side S3 of the second lens L2 is convex near the optical axis, and the image side S4 of the second lens L2 is concave near the optical axis; the object side S5 and the image side S6 of the third lens L3 are both convex near the optical axis; the object side S7 and the image side S8 of the fourth lens L4 are convex and concave respectively near the optical axis; the object side S9 and the image side S10 of the fifth lens L5 are both concave near the optical axis; the object side S11 and the image side S12 of the sixth lens L6 are convex and concave respectively near the optical axis; the object side S13 and the image side S14 of the seventh lens L7 are both concave near the optical axis.

[0155] Specifically, the parameters of the optical lens 100 are given in the following Table 1. Among them, the elements along the optical axis of the optical lens 100 from the object side to the image side are arranged in sequence according to the order of the elements from top to bottom in Table 1. In the same lens, the surface with a smaller surface number is the object side of the lens, and the surface with a larger surface number is the image side of the lens, such as surface numbers 3 and 4 correspond to the object side S1 and image side S2 of the first lens L1 respectively. The Y radius in Table 1 is the radius of curvature of the object side or image side of the corresponding surface number at the optical axis. The first value in the "Thickness" parameter column of the lens is the thickness of the lens on the optical axis, and the second value is the distance from the image side of the lens to the next surface on the optical axis. The value of the aperture STO in the "Thickness" parameter column is the distance from the aperture STO to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis) on the optical axis. By default, the direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis. When the value is negative, it indicates that the aperture STO is set on the image side of the next surface vertex. If the aperture STO thickness is a positive value, the aperture STO is on the object side of the next surface vertex. It can be understood that the units of the Y radius, thickness, and focal length in Table 1 are all mm. And the refractive index, Abbe number, etc. in Table 1 are all obtained at a reference wavelength of 587.6nm, and the focal length is obtained at a reference wavelength of 555nm.

[0156]

[0157]

[0158] Table 1

[0159] In the first embodiment, the object-side surface and the image-side surface of the first lens L1 to the seventh lens L7 are all aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0160]

[0161] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the curvature of the aspheric surface at the optical axis, c=1 / Y (i.e., the paraxial curvature c is the reciprocal of the curvature radius Y in Table 1 above); K is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Table 2 gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of the aspheric surfaces of the first lens L1 to the seventh lens L7. In addition, for the object side and image side of the sixth lens L6 and the seventh lens L7, the high-order coefficients A22, A24, A26, and A28 are also given.

[0162] Table 2

[0163]

[0164]

[0165] See also Figure 2 In (A), Figure 2 (A) is a spherical aberration curve of the optical lens 100 in the first embodiment at wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 2 It can be seen from (A) in FIG. 1 that the spherical aberration value of the optical lens 100 in the first embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0166] See also Figure 2 In (B), Figure 2 (B) is the astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 555 nm. The horizontal axis along the X-axis direction represents the focus offset, in units of mm, and the vertical axis along the Y-axis direction represents the image height, in units of mm. In the astigmatism curve diagram, T represents the curvature of the imaging surface 101 in the meridian direction, and S represents the curvature of the imaging surface 101 in the sagittal direction. Figure 2 As can be seen from (B) in the figure, at this wavelength, the field curvature of the optical lens 100 is small, the field curvature and astigmatism of each field of view are well corrected, and the center and edge of the field of view have clear images, that is, the astigmatism of the optical lens 100 is well compensated.

[0167] See also Figure 2 (C) in Figure 2 (C) is a distortion curve of the optical lens 100 in the first embodiment at a wavelength of 555 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the image height, in units of mm. Figure 2 As can be seen from (C) in FIG. 1 , at this wavelength, the image deformation caused by the main light beam is small, and the distortion of the optical lens 100 is well corrected.

[0168] Second embodiment

[0169] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of the present application is as follows Figure 3 As shown, the optical lens 100 includes a flat glass 120, a first lens L1, an aperture STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and a filter 110, which are arranged in sequence along the optical axis from the object side to the image side.

[0170] In this embodiment, 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 positive 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.

[0171] Furthermore, the object side S1 and the image side S2 of the first lens L1 are concave and convex at the near optical axis, respectively; the object side surface S3 of the second lens L2 is convex at the near optical axis, and the image side surface S4 of the second lens L2 is concave at the near optical axis; the object side surface S5 and the image side surface S6 of the third lens L3 are both convex at the near optical axis; the object side surface S7 and the image side surface S8 of the fourth lens L4 are both convex at the near optical axis; the object side surface S9 and the image side surface S10 of the fifth lens L5 are respectively concave and convex at the near optical axis; the object side surface S11 and the image side surface S12 of the sixth lens L6 are respectively convex and concave at the near optical axis; the object side surface S13 and the image side surface S14 of the seventh lens L7 are respectively convex and concave at the near optical axis.

[0172] Specifically, the parameters of the optical lens 100 are given in the following Table 3. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0173] Table 3

[0174]

[0175] In the second embodiment, Table 4 gives the high-order coefficients of various aspherical mirror surfaces that can be used for various lenses, wherein the various aspherical surface shapes can be defined by the formula given in the first embodiment.

[0176] Table 4

[0177]

[0178]

[0179] See also Figure 4 ,Depend on Figure 4 It can be seen from the spherical aberration curve (A), the light astigmatism diagram (B) and the distortion curve diagram (C) in FIG. 1 that the spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 4 (A) Figure 4 (B) and Figure 4 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0180] Third embodiment

[0181] The structural schematic diagram of the optical lens 100 disclosed in the third embodiment of the present application is as follows: Figure 5 As shown, the optical lens 100 includes a flat glass 120, a first lens L1, an aperture STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and a filter 110, which are arranged in sequence along the optical axis from the object side to the image side.

[0182] In this embodiment, 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 positive 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.

[0183] Furthermore, the object side S1 and the image side S2 of the first lens L1 are both convex surfaces at the near optical axis; the object side surface S3 of the second lens L2 is a convex surface at the near optical axis, and the image side surface S4 of the second lens L2 is a concave surface at the near optical axis; the object side surface S5 and the image side surface S6 of the third lens L3 are both convex surfaces at the near optical axis; the object side surface S7 and the image side surface S8 of the fourth lens L4 are both convex surfaces at the near optical axis; the object side surface S9 and the image side surface S10 of the fifth lens L5 are concave and convex surfaces at the near optical axis, respectively; the object side surface S11 and the image side surface S12 of the sixth lens L6 are convex and concave surfaces at the near optical axis, respectively; the object side surface S13 and the image side surface S14 of the seventh lens L7 are convex and concave surfaces at the near optical axis, respectively.

[0184] The parameters of the optical lens 100 are given in the following Table 5. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0185] Table 5

[0186]

[0187] In the third embodiment, Table 6 shows the high-order coefficients of the aspherical mirror surfaces that can be used for each lens in the third embodiment.

[0188] Table 6

[0189]

[0190]

[0191] See also Figure 6 ,Depend on Figure 6It can be seen from the spherical aberration curve (A), the light astigmatism diagram (B) and the distortion curve diagram (C) in FIG. 1 that the spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 6 (A) Figure 6 (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0192] Fourth embodiment

[0193] The structural schematic diagram of the optical lens 100 disclosed in the fourth embodiment of the present application is as follows: Figure 7 As shown, the optical lens 100 includes a flat glass 120, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and a filter 110, which are arranged in sequence along the optical axis from the object side to the image side.

[0194] In this embodiment, the first lens L1 has negative refractive power, the second lens L2 has positive 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.

[0195] Furthermore, the object side S1 and the image side S2 of the first lens L1 are both concave surfaces at the near optical axis; the object side surface S3 of the second lens L2 is a convex surface at the near optical axis, and the image side surface S4 of the second lens L2 is a convex surface at the near optical axis; the object side surface S5 and the image side surface S6 of the third lens L3 are both convex surfaces at the near optical axis; the object side surface S7 and the image side surface S8 of the fourth lens L4 are both concave surfaces at the near optical axis; the object side surface S9 and the image side surface S10 of the fifth lens L5 are concave and convex surfaces at the near optical axis, respectively; the object side surface S11 and the image side surface S12 of the sixth lens L6 are convex and concave surfaces at the near optical axis, respectively; the object side surface S13 and the image side surface S14 of the seventh lens L7 are both concave surfaces at the near optical axis.

[0196] The parameters of the optical lens 100 are given in Table 7 below.

[0197] Table 7

[0198]

[0199]

[0200] In the fourth embodiment, Table 8 shows the high-order coefficients of various aspherical mirror surfaces that can be used for each lens in the fourth embodiment.

[0201] Table 8

[0202]

[0203]

[0204] See also Figure 8 ,Depend on Figure 8 It can be seen from the spherical aberration curve (A), the light astigmatism diagram (B) and the distortion curve diagram (C) in FIG. 1 that the spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 8 (A) Figure 8 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0205] Fifth embodiment

[0206] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of the present application is as follows Fig. 9 As shown, the optical lens 100 includes a flat glass 120, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and a filter 110, which are arranged in sequence along the optical axis from the object side to the image side.

[0207] In this embodiment, the first lens L1 has negative refractive power, the second lens L2 has positive 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.

[0208] Furthermore, the object side S1 and the image side S2 of the first lens L1 are concave and convex at the near optical axis, respectively; the object side surface S3 of the second lens L2 is a convex surface at the near optical axis, and the image side surface S4 of the second lens L2 is a convex surface at the near optical axis; the object side surface S5 and the image side surface S6 of the third lens L3 are both convex at the near optical axis; the object side surface S7 and the image side surface S8 of the fourth lens L4 are respectively concave and convex at the near optical axis; the object side surface S9 and the image side surface S10 of the fifth lens L5 are both concave at the near optical axis; the object side surface S11 and the image side surface S12 of the sixth lens L6 are respectively convex and concave at the near optical axis; the object side surface S13 and the image side surface S14 of the seventh lens L7 are respectively convex and concave at the near optical axis.

[0209] Specifically, the parameters of the optical lens 100 are given in the following Table 9. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0210] Table 9

[0211]

[0212]

[0213] In the fifth embodiment, Table 10 gives the high-order coefficients of various aspherical mirror surfaces that can be used for various lenses, wherein the various aspherical surface shapes can be defined by the formula given in the first embodiment.

[0214] Table 10

[0215]

[0216]

[0217] See also Fig.10 ,Depend on Fig.10 It can be seen from the spherical aberration curve (A), the light astigmatism diagram (B) and the distortion curve diagram (C) in FIG. 1 that the spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.10 (A) Fig.10 (B) and Fig.10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0218] Sixth embodiment

[0219] The structural schematic diagram of the optical lens 100 disclosed in the sixth embodiment of the present application is as follows Fig.11As shown, the optical lens 100 includes a flat glass 120, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and a filter 110, which are arranged in sequence along the optical axis from the object side to the image side.

[0220] In this embodiment, the first lens L1 has negative refractive power, the second lens L2 has positive 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.

[0221] Furthermore, the object side S1 and the image side S2 of the first lens L1 are convex and concave at the near optical axis, respectively; the object side surface S3 of the second lens L2 is convex at the near optical axis, and the image side surface S4 of the second lens L2 is convex at the near optical axis; the object side surface S5 and the image side surface S6 of the third lens L3 are both convex at the near optical axis; the object side surface S7 and the image side surface S8 of the fourth lens L4 are both concave at the near optical axis; the object side surface S9 and the image side surface S10 of the fifth lens L5 are both concave at the near optical axis; the object side surface S11 and the image side surface S12 of the sixth lens L6 are convex and concave at the near optical axis, respectively; the object side surface S13 and the image side surface S14 of the seventh lens L7 are convex and concave at the near optical axis, respectively.

[0222] The parameters of the optical lens 100 are given in Table 11 below.

[0223] Table 11

[0224]

[0225]

[0226] In the sixth embodiment, Table 12 gives the high-order coefficients of each aspherical mirror surface of each lens that can be used in the sixth embodiment.

[0227] Table 12

[0228]

[0229] See also Fig.12 ,Depend on Fig.12 It can be seen from the spherical aberration curve (A), the light astigmatism diagram (B) and the distortion curve diagram (C) in FIG. 1 that the spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.12 (A) Fig.12 (B) and Fig.12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2(A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0230] Please refer to Table 13, which is a summary of the ratios of various relationship equations in the first to sixth embodiments of the present application.

[0231] Table 13

[0232]

[0233] See also Fig.13 The present application also discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any one of the first to sixth embodiments, wherein the image sensor 201 is arranged on the image side of the optical lens 100. The photosensitive surface of the image sensor 201 is located on the imaging surface 101 of the optical lens 100, and the light of the object incident on the photosensitive surface through the lens can be converted into an electrical signal of the image. The image sensor 201 can be a complementary metal oxide semiconductor (CMOS) or a charge-coupled device (CCD). The camera module 200 can be an imaging module integrated on the terminal device 300, or it can be an independent lens. It can be understood that the camera module 200 with the above optical lens 100 has all the technical effects of the above optical lens 100, that is, the camera module 200 can meet the design requirements of a large field of view while meeting the miniaturization design of the optical lens 100. Since the above technical effects have been described in detail in the embodiment of the optical lens 100, they will not be described again here.

[0234] The present application also discloses a terminal device 300, which includes a housing 301 and the camera module 200, wherein the camera module 200 is disposed in the housing 301. The terminal device 300 may include but is not limited to a mobile phone, a tablet computer, a laptop computer, a smart watch, etc. Fig.14 Taking the terminal device 300 as a mobile phone as an example, at this time, the camera module 200 can be set in the shell 301.

[0235] It can be understood that the terminal device 300 having the camera module 200 also has all the technical effects of the optical lens 100. That is, the terminal device 300 can meet the design requirements of a large field of view while meeting the miniaturization design of the optical lens 100. Since the above technical effects have been described in detail in the embodiment of the optical lens 100, they will not be repeated here.

[0236] The optical lens, camera module and terminal device disclosed in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the optical lens, camera module and terminal device of the present application and its core idea; at the same time, for general technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An optical lens, characterized in that, it has a total of seven refractive lenses, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side along the optical axis; the first lens has refractive power; the second lens has refractive power, and the object side surface of the second lens is convex near the optical axis; the third lens has positive refractive power, and both the object side surface and the image side surface of the third lens are convex near the optical axis; the fourth lens has refractive power; the fifth lens has negative refractive power, and the object side surface of the fifth lens is concave near the optical axis; the sixth lens has positive refractive power, the object side surface of the sixth lens is convex near the optical axis, and the image side surface of the sixth lens is concave near the optical axis; the seventh lens has negative refractive power, and the image side surface of the seventh lens is concave near the optical axis; the optical lens satisfies the following relational expressions: 2.6 < FNO < 4, 50 deg < FOV < 90 deg; wherein, FNO is the f - number of the optical lens, and FOV is the maximum field - of - view angle of the optical lens.

2. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 9 < TTL / f < 14; and / or, 2 < ImgH / ObjH < 3.5; and / or, 1.5 < TTL / ImgH < 3; wherein, f is the focal length of the optical lens, ObjH is the object height 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 half of the image height corresponding to the maximum field - of - view angle of the optical lens.

3. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 50 deg < FOV < 90 deg; and / or, 20 deg / mm < FOV / ImgH < 40 deg / mm; and / or, 90 deg / mm < FOV / f; wherein, ImgH is half of the image height corresponding to the maximum field - of - view angle of the optical lens, and f is the focal length of the optical lens.

4. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 0.3 < NA < 0.6, and / or, 0.2 mm < u < 1 mm; wherein, NA is the numerical aperture of the object side of the optical lens, and u is the object distance of the optical lens.

5. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 2 < f3 / f; and / or, 2 < f4 / f; and / or, f5 / f < - 2; and / or, 2 < f6 / f < 6; and / or, - 5 < f7 / f < - 1.5; and / or, 0.65 < f3 / n3 < 1.65; wherein, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, f is the focal length of the optical lens, and n3 is the refractive index of the third lens.

6. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 2 < R3 / f; and / or, 1.5 < R5 / f; and / or, R6 / f < -2; and / or, R9 / f < -1.2; and / or, 0.9 < R11 / f < 1.5; and / or, 1.2 < R12 / f < 2; wherein, f is the focal length of the optical lens, R3 is the curvature radius of the object side surface of the second lens on the optical axis, R5 is the curvature radius of the object side surface of the third lens on the optical axis, R6 is the curvature radius of the image side surface of the third lens on the optical axis, R9 is the curvature radius of the object side surface of the fifth lens on the optical axis, R11 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 object side surface of the seventh lens on the optical axis.

7. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 0.2 < CT1 / CT2; and / or, 1 < CT3 / CT4 < 3.4; and / or, 0.7 < CT3 / CT5 < 3.2; and / or, 0.9 < CT3 / CT2 < 3.2; and / or, 0.4 < CT3 / CT1 < 3.1; and / or, 0.9 < AT67 / (CT6 + CT7) < 1.9; and / or, 1.2 < TD / (CT1 + CT2 + CT3 + CT4 + CT5) < 2.7; wherein, CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, AT67 is the distance on the optical axis from the image side surface of the sixth lens to the object side surface of the seventh lens, and TD is the distance on the optical axis from the object side surface of the first lens to the image side surface of the seventh lens.

8. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 0.9 < ET7 / CT7 < 2.7; and / or, -1.9 < SAG13 / CT7 < -0.6; and / or, 2.3 < (|f1| + |f2|) / |f7| < 6; wherein, ET7 is the distance from the maximum effective semi-aperture of the object side surface of the seventh lens to the maximum effective semi-aperture of the image side surface of the seventh lens, CT7 is the distance of the seventh lens on the optical axis, SAG13 is the distance on the optical axis from the maximum effective semi-aperture of the object side surface of the seventh lens to the intersection point of the object side surface of the seventh lens and the optical axis in the optical axis direction, f1 is the focal length of the first lens, f2 is the focal length of the second lens, and f7 is the focal length of the seventh lens.

9. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 0.2 < CT1 / SD1 < 2; and / or, 0.7 < SD10 / SD1 < 2.7; and / or, 2 < SD14 / SD1 < 6; and / or, 3 < ImgH / SD1 < 6; wherein, CT1 is the thickness of the first lens on the optical axis, SD1 is the maximum effective semi-aperture of the object side surface of the first lens, SD10 is the maximum effective semi-aperture of the image side surface of the fifth lens, SD14 is the maximum effective semi-aperture of the image side surface of the seventh lens, and ImgH is half of the image height corresponding to the maximum field of view angle of the optical lens.

10. An imaging module, characterized in that the imaging module includes an image sensor and an optical lens as described in any one of claims 1-9, and the image sensor is disposed on the image side of the optical lens.

11. A terminal device, characterized in that it includes a housing and the imaging module as described in claim 10, and the imaging module is disposed in the housing.

Images