Optical lens, camera module and terminal equipment

Abstract

The invention discloses an optical lens, a camera module and terminal equipment, the optical lens comprises six lenses with refractive power, the first lens has positive refractive power, and the object side surface and the image side surface of the first lens are respectively a convex surface and a concave surface; the second lens has negative refractive power, and the object side surface and the image side surface of the second lens are concave surfaces; the object side surface and the image side surface of the third lens are respectively a concave surface and a convex surface; the fourth lens has positive refractive power, and the object side surface and the image side surface of the fourth lens are convex surfaces; the fifth lens has positive refractive power, and the object side surface of the fifth lens is a convex surface; the sixth lens has negative refractive power, and the object side surface and the image side surface of the sixth lens are concave surfaces; the optical lens satisfies the following relational expressions: 15 default; hFOVlt, HFOVt; 20deg, FNOlt, 20deg, FNOlt; 2.1. According to the optical lens, the camera module and the terminal equipment, the miniaturization design requirement can be met, and meanwhile the optical lens has the good imaging quality.

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] With the rapid development of advanced driver assistance systems, optical lenses have been more widely used and developed. For example, in long-distance imaging such as car recorders, automatic parking, front vehicle collision warning, lane departure warning, and pedestrian detection warning, the optical lens needs to have a longer focal length, but the longer focal length will cause the total length of the optical lens to be longer, which is not conducive to the miniaturization of the lens. At the same time, this type of optical lens requires a larger aperture so that it can have good imaging quality at night or in environments with relatively weak lighting conditions. Therefore, it is necessary to develop an optical lens with miniaturization characteristics and good imaging quality in low light and harsh environments. Summary of the invention

[0003] The embodiments of the present application disclose an optical lens, a camera module and a terminal device, which can meet the design requirements of miniaturization while ensuring that the optical lens has good imaging quality.

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

[0005] The first lens has positive refractive power, the object side surface of the first lens is convex at the near optical axis, and the image side surface of the first lens is concave at the near optical axis;

[0006] The second lens has negative refractive power, and the object side surface and the image side surface of the second lens are both concave surfaces at the near optical axis;

[0007] The third lens has refractive power, the object side surface of the third lens is concave at the near optical axis, and the image side surface of the third lens is convex at the near optical axis;

[0008] The fourth lens has positive refractive power, and the object side surface and the image side surface of the fourth lens are both convex surfaces near the optical axis;

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

[0010] The sixth lens has negative refractive power, and the object side surface and the image side surface of the sixth lens are both concave surfaces near the optical axis;

[0011] The optical lens satisfies the following relationship:

[0012] 15deg < HFOV < 20deg, FNO < 2.1;

[0013] Wherein, HFOV is half of the maximum field of view angle of the optical lens, and FNO is the f-number of the optical lens.

[0014] In the optical lens provided by the present application, in order to meet the design requirements of miniaturization while enabling the optical lens to have good imaging quality, the first lens is set to have positive refractive power. With the design that its object side and image side are convex and concave respectively near the optical axis, the first lens can receive more object-side light, expand the field of view angle range, effectively increase the field of view angle, improve the relative illumination of the edge field of view of the optical lens, and effectively avoid the appearance of vignetting; the second lens has negative refractive power. With the design that its object side and image side are concave near the optical axis, this is conducive to further collecting light, enabling as much large-angle light as possible to enter the optical lens, and effectively improving the illumination of the optical lens; the design that the object side and image side of the third lens are concave and convex respectively near the optical axis can make the light enter the optical lens more gently; the fourth lens has positive refractive power. With the design that its object side and image side are convex near the optical axis, it is conducive to raising the light, balancing aberrations, and meeting the requirements of the image plane; the fifth lens has positive refractive power. With the design that its object side is convex near the optical axis, it can compress the light collected in the front, thereby reducing the aperture of the rear lens, which is beneficial to reducing the total length of the optical lens. At the same time, it is beneficial to reduce the principal ray angle, so that the optical lens also has good imaging quality at night or in an environment with relatively weak light conditions; the sixth lens has negative refractive power, and the design that its object side and image side are concave near the optical axis can correct the off-axis spherical aberration and chromatic dispersion of the optical lens, thereby improving the optical imaging quality.

[0015] The optical lens satisfies the relational expression 15deg < HFOV < 20deg. By reasonably setting the value of half of the maximum field of view angle of the optical lens within a reasonable range, while realizing the telephoto function of the optical lens, it will not cause the total length of the optical lens to be too long, which is beneficial to the miniaturization of the optical lens.

[0016] The optical lens satisfies the relational expression FNO < 2.1. By restricting the f-number of the optical lens, it can meet the large aperture required by the optical lens, improve the light input, so that it also has good imaging quality at night or in an environment with relatively weak light conditions, and further meets the long-distance imaging requirements.

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

[0018] 5.5 < TTL / IMGH < 7, and / or, 1.7 < TTL / F < 1.9, and / or, 3 < F / IMGH < 4;

[0019] Wherein, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, that is, the total length of the optical lens, 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.

[0020] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0021] |F12 / F| < 20, and / or, |F56 / F| < 30, and / or, -2 < F1 / F6 < -1.1;

[0022] Wherein, F12 is the combined focal length of the first lens and the second lens, F56 is the combined focal length of the fifth lens and the sixth lens, F1 is the focal length of the first lens, and F6 is the focal length of the sixth lens.

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

[0024] 0.5 < F5 / F < 3, and / or, 3 < F5 / CT5 < 20, and / or, 1 < CT5 / ET5 < 3;

[0025] Wherein, F5 is the focal length of the fifth lens, CT5 is the thickness of the fifth lens on the optical axis, and ET5 is the distance in the optical axis direction from the maximum effective aperture of the object side of the fifth lens to the maximum effective aperture of the image side of the fifth lens, that is, the edge thickness of the fifth lens.

[0026] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0027] 1.1 < SD8 / SD5 < 1.3, and / or, 1.1 < CT2 / SAG4 < 2.1, and / or, 1.1 < ET6 / CT6 < 1.25;

[0028] Wherein, SD5 is half of the maximum effective aperture of the object side of the third lens, SD8 is half of the maximum effective aperture of the image side of the fourth lens, CT2 is the thickness of the second lens on the optical axis, SAG4 is the distance from the intersection of the image side of the second lens and the optical axis to the maximum effective aperture of the image side of the second lens on the optical axis, that is, the sagitta at the maximum effective semi-aperture of the image side of the second lens, CT6 is the thickness of the sixth lens on the optical axis, and ET6 is the distance from the maximum effective aperture of the object side of the sixth lens to the maximum effective aperture of the image side of the sixth lens in the optical axis direction, that is, the edge thickness of the sixth lens.

[0029] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0030] 5 < CT MAX / CT MIN < 7.5, and / or, 1.5 < CT6 / CT1 < 2;

[0031] Wherein, CT MAX is the maximum thickness on the optical axis among the first lens to the sixth lens, CT MIN is the minimum thickness on the optical axis among the first lens to the sixth lens, CT1 is the thickness of the first lens on the optical axis, and CT6 is the thickness of the sixth lens on the optical axis.

[0032] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0033] -5 < R8 / R7 < 0, and / or, -25 < SD8 / SAG8 < -5;

[0034] Wherein, R7 is the curvature radius of the object side of the fourth lens on the optical axis, R8 is the curvature radius of the image side of the fourth lens on the optical axis, SD8 is half of the maximum effective aperture of the image side of the fourth lens, and SAG8 is the distance from the intersection of the image side of the fourth lens and the optical axis to the maximum effective aperture of the image side of the fourth lens on the optical axis, that is, the sagitta at the maximum effective semi-aperture of the image side of the fourth lens.

[0035] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0036] 7.5deg < HFOV / FNO < 9.5deg, and / or, 1 < |SAG9 / SAG10| < 4, and / or, 1.45 < CT1 / ET1 < 1.7;

[0037] Among them, SAG9 is the distance from the intersection of the object side surface of the fifth lens and the optical axis to the maximum effective aperture of the object side surface of the fifth lens on the optical axis, that is, the sag height at the maximum effective half-aperture of the object side surface of the fifth lens, SAG10 is the distance from the intersection of the image side surface of the fifth lens and the optical axis to the maximum effective aperture of the image side surface of the fifth lens on the optical axis, that is, the sag height at the maximum effective half-aperture of the image side surface of the fifth lens, CT1 is the thickness of the first lens on the optical axis, ET1 is the distance from the maximum effective aperture of the object side surface of the first lens to the maximum effective aperture of the image side surface of the first lens in the direction of the optical axis, that is, the edge thickness of the first lens.

[0038] In a second aspect, the present application discloses a camera module, which includes an image sensor and the optical lens as described in the first aspect above, wherein the image sensor is arranged on the image side of the optical lens.

[0039] In a third aspect, the present application further discloses a terminal device, which includes a shell and a camera module as described in the second aspect above, wherein the camera module is arranged in the shell.

[0040] Compared with the prior art, the beneficial effects of this application are:

[0041] In the optical lens provided by the present application, in order to meet the design requirements of miniaturization while making the optical lens have good imaging quality, the first lens is set to have positive refractive power, and its object side surface and image side surface are respectively convex and concave at the near optical axis, so that the first lens can receive more object side light, expand the field of view angle range, effectively increase the field of view angle, improve the relative illumination of the edge field of view of the optical lens, and effectively avoid the occurrence of dark corners; the second lens has negative refractive power, and its object side surface and image side surface are respectively concave at the near optical axis, which is conducive to further collecting light, so that as much large-angle light as possible enters the optical lens, effectively improving the illumination of the optical lens; the object side surface and image side surface of the third lens are respectively concave and concave at the near optical axis. The convex surface design allows light to enter the optical lens more smoothly; the fourth lens has positive refractive power, and its object side and image side are both convex at the near optical axis, which is beneficial to raising the light, balancing the aberration, and meeting the needs of the image surface; the fifth lens has positive refractive power, and its object side is convex at the near optical axis, which can compress the light collected in the front, thereby reducing the aperture of the rear lens, which is beneficial to reducing the total length of the optical lens, and at the same time is beneficial to reducing the main light angle, so that the optical lens has good imaging quality at night or in environments with relatively weak lighting conditions; the sixth lens has negative refractive power, and its object side and image side are both concave at the near optical axis, which can correct the off-axis spherical aberration and dispersion of the optical lens, thereby improving the optical imaging quality.

[0042] The optical lens satisfies the relationship 15deg < HFOV < 20deg. By reasonably setting the value of half of the maximum field of view angle of the optical lens within a reasonable range, the telephoto function of the optical lens can be achieved without causing the total length of the optical lens to be too long, which is beneficial to the miniaturization of the optical lens.

[0043] The optical lens satisfies the relationship FNO < 2.1. By restricting the aperture number of the optical lens, a large aperture required by the optical lens can be satisfied, the light input can be increased, and it has good imaging quality even in an environment with weak light at night or under low light conditions, further meeting the requirements for long-distance imaging. Brief Description of the Drawings

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0045] Figure 1 It is a schematic structural diagram of the optical lens disclosed in Embodiment 1 of the present application;

[0046] Figure 2 It is the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 1 of the present application;

[0047] Figure 3 It is a schematic structural diagram of the optical lens disclosed in Embodiment 2 of the present application;

[0048] Figure 4 It is the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 2 of the present application;

[0049] Figure 5 It is a schematic structural diagram of the optical lens disclosed in Embodiment 3 of the present application;

[0050] Figure 6 It is the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 3 of the present application;

[0051] Figure 7 It is a schematic structural diagram of the optical lens disclosed in Embodiment 4 of the present application;

[0052] Figure 8 It is the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 4 of the present application;

[0053] Fig. 9 It is a schematic structural diagram of the optical lens disclosed in Embodiment 5 of the present application;

[0054] Fig.10 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 5 of the present application;

[0055] Fig.11 is a schematic structural diagram of the optical lens disclosed in Example 6 of the present application;

[0056] Fig.12 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 6 of the present application;

[0057] Fig.13 is a schematic structural diagram of an optical lens disclosed in Example 7 of the present application;

[0058] Fig.14 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 7 of the present application;

[0059] Fig.15 It is a structural schematic diagram of the camera module disclosed in this application;

[0060] Fig.16 It is a schematic diagram of the structure when the terminal device disclosed in the present application is a car. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0062] In this application, the terms "inside", "outside", etc. indicate positions or location relationships based on the positions or location relationships shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit the indicated devices, elements, or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0063] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0064] In addition, the terms "provided with" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] 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.

[0066] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0067] See also Figure 1 The 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 positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power or negative refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 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, and the sixth lens L6 in sequence from the object side of the first lens L1, and is finally imaged on the imaging surface 101 of the optical lens 100.

[0068] Furthermore, the object-side surface 11 of the first lens L1 is convex at the near optical axis, and the image-side surface 12 of the first lens L1 is concave at the near optical axis; the object-side surface 21 and the image-side surface 22 of the second lens L2 are both concave at the near optical axis; the object-side surface 31 of the third lens L3 is concave at the near optical axis, and the image-side surface 32 of the third lens L3 is convex at the near optical axis; the object-side surface 41 and the image-side surface 42 of the fourth lens L4 are both convex at the near optical axis; the object-side surface 51 of the fifth lens L5 is convex at the near optical axis, and the image-side surface 52 of the fifth lens L5 is convex or concave at the near optical axis; the object-side surface 61 and the image-side surface 62 of the sixth lens L6 are both concave at the near optical axis.

[0069] In the optical lens 100 provided in the present application, in order to meet the design requirements of miniaturization while ensuring that the optical lens 100 has good imaging quality, the first lens L1 is set to have positive refractive power, and its object side surface and image side surface are convex and concave respectively at the near optical axis. This allows the first lens L1 to receive more object side light, expand the field of view angle range, effectively increase the field of view angle, improve the relative illumination of the edge field of view of the optical lens 100, and effectively avoid the occurrence of dark corners.

[0070] The second lens L2 has negative refractive power, and its object side and image side are both concave at the near optical axis, which is beneficial for further collecting light, allowing as much large-angle light as possible to enter the optical lens 100, effectively improving the illumination of the optical lens 100.

[0071] The object-side surface and image-side surface of the third lens L3 are respectively concave and convex at the near optical axis, so that light can enter the optical lens 100 more smoothly.

[0072] The fourth lens L4 has positive refractive power, and its object side surface and image side surface are both convex at the near optical axis, which is beneficial to raising the light, balancing the aberration, and meeting the requirements of the image surface.

[0073] The fifth lens L5 has positive refractive power. Combined with the design that its object side is convex at the near optical axis, it can compress the light collected in the front, thereby reducing the aperture of the rear lens, which is beneficial to reducing the overall length of the optical lens 100 and the main light angle, so that the optical lens 100 has good imaging quality at night or in an environment with relatively weak lighting conditions.

[0074] The sixth lens L6 has negative refractive power, and its object-side surface and image-side surface are both concave near the optical axis, which can correct the off-axis spherical aberration and dispersion of the optical lens 100, thereby improving the optical imaging quality.

[0075] Optionally, all lenses in the optical lens 100 may be made of glass, or may be made of plastic, or some lenses may be made of glass and some lenses may be made of plastic. Preferably, all lenses in the optical lens 100 are made of glass. Lenses made of glass can suppress the deviation of the back focus of the optical lens 100 due to temperature changes, so as to improve the stability of the optical lens 100. At the same time, the use of glass material can avoid the blurring of the optical lens 100 caused by high and low temperature changes in the use environment, which affects the normal use of the optical lens 100.

[0076] Optionally, all lenses in the optical lens 100 may be spherical lenses. The spherical surface design can reduce the difficulty of preparing each lens and reduce the processing cost of the lens.

[0077] In some embodiments, the optical lens 100 may further include a diaphragm 102. The diaphragm 102 may be an aperture stop and / or a field stop, and may be disposed between the image side 22 of the second lens L2 and the object side 31 of the third lens L3 of the optical lens 100. Of course, in other embodiments, the diaphragm 102 may also be disposed between other lenses, and the setting may be adjusted according to actual conditions, and no specific limitation is made in this embodiment.

[0078] In some embodiments, the optical lens 100 may further include a filter 110. The filter 110 may be disposed between the image side 62 of the sixth lens L6 and the imaging surface 101 of the optical lens 100. Of course, in other embodiments, the filter 110 may also be disposed between other lenses, and the setting may be adjusted according to actual conditions, and no specific limitation is made in this embodiment. In this embodiment, the filter 110 may be an infrared cut-off filter, so that light of other bands such as infrared light can be filtered out, and only visible light can pass through, making the imaging more in line with the visual experience of the human eye. Of course, the filter 110 may also be an infrared band-pass filter, so that light of other bands such as visible light can be filtered out, and only infrared light can pass through. By filtering out light of 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 a dim environment and other special application scenarios. Preferably, the filter 110 may be made of glass. Of course, in other embodiments, the filter 110 may also be made of optical glass coating, or a filter 110 of other materials, which can be selected according to actual needs, and no specific limitation is made in this embodiment.

[0079] In some embodiments, the optical lens 100 further includes a protective glass 120. The protective glass 120 is disposed between the filter 110 and the imaging surface 101, so as to be close to the image sensor during subsequent assembly, thereby playing a protective role.

[0080] In one embodiment, the optical lens 100 satisfies the relationship 15deg < HFOV < 20deg, where HFOV is half of the maximum field of view angle of the optical lens 100. By reasonably setting the value of half of the maximum field of view angle of the optical lens 100 within a reasonable range, while realizing the telephoto function of the optical lens 100, the total length of the optical lens 100 will not be too long, which is beneficial to the miniaturization of the optical lens 100.

[0081] In one embodiment, the optical lens 100 satisfies the relation FNO < 2.1, where FNO is the f-number of the optical lens 100. By restricting the f-number of the optical lens 100, a large aperture required by the optical lens 100 can be satisfied, the light input can be increased, and good imaging quality can be achieved even at night or in an environment with relatively weak light conditions, further meeting the requirements for long-distance imaging.

[0082] In one embodiment, the optical lens 100 satisfies the relation 7.5deg < HFOV / FNO < 9.5deg. By controlling the ratio between half of the maximum field of view angle of the optical lens 100 and the f-number of the optical lens 100, a reasonable focal length and f-number can be provided for the optical lens 100, enabling the optical lens 100 to have a telephoto function while also having good imaging quality at night or in an environment with relatively weak light conditions.

[0083] In one embodiment, the optical lens 100 satisfies the relation 5.5 < TTL / IMGH < 7, where TTL is the distance from the object side surface 11 of the first lens L1 to the imaging surface 101 of the optical lens 100 on the optical axis, and IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens 100. By controlling the ratio of the total length of the optical lens 100 to half of the image height of the optical lens 100, it is beneficial to control the total length of the optical lens 100, and thus beneficial to realizing the miniaturized design of the optical lens 100.

[0084] In one embodiment, the optical lens 100 satisfies the relation 1.7 < TTL / F < 1.9, where F is the focal length of the optical lens 100. By reasonably controlling the ratio between the total length of the optical lens 100 and the focal length of the optical lens 100 within a reasonable range, when the focal length of the optical lens 100 is relatively long, the total length of the optical lens 100 will not be too long, so that the optical lens 100 has telephoto characteristics and meets the design requirements of miniaturization.

[0085] In one embodiment, the optical lens 100 also satisfies the relation 3 < F / IMGH < 4. By reasonably configuring the ratio of the focal length of the optical lens 100 to half of the image height, it is beneficial for the optical lens 100 to meet the requirements for high-definition imaging while having a telephoto function. When the optical lens 100 exceeds the upper limit of the above relation, the focal length of the optical lens 100 is too long, which is not conducive to realizing the miniaturization of the optical lens 100; when the optical lens 100 is lower than the lower limit of the above relation, the focal length of the optical lens 100 is too short, which is not conducive to realizing the telephoto function of the optical lens 100.

[0086] In one embodiment, the optical lens 100 satisfies the relation |F12 / F| < 20, where F12 is the combined focal length of the first lens L1 and the second lens L2. When the above relation is satisfied, by reasonably controlling the ratio between the combined focal length of the combined lens (i.e., the combined lens formed by the first lens L1 and the second lens L2) and the focal length of the optical lens pair, it is beneficial to miniaturize the optical lens 100 and enable the optical lens 100 to have an appropriate refractive power to fully contract light rays into the aperture 102, avoiding excessive aberration introduced when large-angle light rays enter the optical lens 100, thereby being beneficial to improving the imaging quality of the optical lens 100.

[0087] In one embodiment, the optical lens 100 satisfies the relation |F56 / F| < 30, where F56 is the combined focal length of the fifth lens L5 and the sixth lens L6. By controlling the ratio between the combined focal length of the fifth lens L5 and the sixth lens L6 group and the focal length of the optical lens 100 to satisfy the above relation, the refractive power of the combined lens formed by the fifth lens L5 and the sixth lens L6 can be reasonably controlled, effectively correcting the chromatic aberration and aberration of the optical lens and improving the imaging resolution.

[0088] In one embodiment, the optical lens 100 satisfies the relation -2 < F1 / F6 < -1.1, where F1 is the focal length of the first lens L1 and F6 is the focal length of the sixth lens L6. The optical lens 100 configured by the above relation can achieve a more reasonable refractive power distribution, contribute to achieving the telephoto characteristics of the optical lens 100, and can also improve the light converging ability of the optical lens 100, adjust the light focusing position, and shorten the total length of the optical lens 100.

[0089] In one embodiment, the optical lens 100 satisfies the relation 3 < F5 / CT5 < 20, where F5 is the focal length of the fifth lens L5 and CT5 is the thickness of the fifth lens L5 on the optical axis. By reasonably distributing the ratio between the focal length of the fifth lens L5 and the thickness of the fifth lens L5 on the optical axis, the optical lens 100 can satisfy the telephoto characteristics and have a good ability to balance aberration. At the same time, the main ray deflection angle can be reasonably controlled, which is beneficial to adjusting the structure of the optical lens 100.

[0090] In one embodiment, the optical lens 100 satisfies the relation 1.45 < CT1 / ET1 < 1.7, where ET1 is the distance in the optical axis direction from the maximum effective aperture of the object side 11 of the first lens L1 to the maximum effective aperture of the image side 12 of the first lens L1. By reasonably controlling the thickness of the first lens L1 on the optical axis and the edge thickness of the first lens L1, the thickness ratio of the first lens L1 can be reasonably controlled, thereby optimizing the bending freedom of the surface shape of the first lens L1, which is beneficial to the effective convergence of large-angle incident light, and the light passing through the first lens L1 has a small deflection angle, thereby reducing the generation of stray light, and further ensuring good imaging performance. At the same time, the reasonable surface shape change can optimize the lens processing technology and reduce the design and assembly sensitivity of the first lens L1.

[0091] In one embodiment, the optical lens 100 satisfies the relation 1 < CT5 / ET5 < 3, where ET5 is the distance in the optical axis direction from the maximum effective aperture of the object side 51 of the fifth lens L5 to the maximum effective aperture of the image side 52 of the fifth lens L5. By reasonably controlling the thickness of the fifth lens L5 on the optical axis and the edge thickness of the fifth lens L5, the size of the optical lens 100 can be effectively reduced and the telephoto characteristics of the optical lens 100 can be satisfied; at the same time, it is also beneficial to adjust the structure of the optical lens 100 and reduce the processing and assembly difficulty of the lens.

[0092] In one embodiment, the optical lens 100 satisfies the relation 1.1 < ET6 / CT6 < 1.25, where CT6 is the thickness of the sixth lens L6 on the optical axis and ET6 is the distance in the optical axis direction from the maximum effective aperture of the object side 61 of the sixth lens L6 to the maximum effective aperture of the image side 62 of the sixth lens L6. By reasonably controlling the edge thickness of the sixth lens L6 and the thickness of the sixth lens L6 on the optical axis, the volume distribution of the sixth lens L6 can be made uniform, which is beneficial to the processing and forming of the sixth lens and reduces the production difficulty of the sixth lens L6. At the same time, the sixth lens L6 will not generate too large aberration.

[0093] In one embodiment, the optical lens 100 satisfies the relation 1.1 < SD8 / SD5 < 1.3, where SD5 is half of the maximum effective aperture of the object side 31 of the third lens L3 and SD8 is half of the maximum effective aperture of the image side 42 of the fourth lens L4. By controlling the ratio relationship between half of the maximum effective aperture of the image side 42 of the fourth lens L4 and the object side 31 of the third lens L3, the smooth transition of light between the third lens L3 and the fourth lens L4 can be achieved while reducing the design difficulty of the lens structure.

[0094] In one embodiment, the optical lens 100 satisfies the relation 1.1 < CT2 / SAG4 < 2.1, where CT2 is the thickness of the second lens L2 on the optical axis, and SAG4 is the distance from the intersection of the image side 22 of the second lens L2 and the optical axis to the maximum effective aperture of the image side 22 of the second lens L2 on the optical axis. Satisfying the above relation is beneficial to avoid large-angle turning of the light rays passing through the second lens L2, reduce the tolerance sensitivity, and avoid the appearance of serious ghost images.

[0095] In one embodiment, the optical lens 100 satisfies the relation 5 < CT MAX / CT MIN < 7.5, where CT MAX is the maximum thickness on the optical axis among the first lens L1 to the sixth lens L6, and CT MIN is the minimum thickness on the optical axis among the first lens L1 to the sixth lens L6. By reasonably setting the relationship between CT MAX and CT MIN the thickness distribution of the lens can be made more uniform, which is beneficial to improving the spatial layout and processability of the optical lens 100.

[0096] In one embodiment, the optical lens 100 satisfies the relation 1.5 < CT6 / CT1 < 2, where CT1 is the thickness of the first lens L1 on the optical axis. By reasonably distributing the ratio of the thicknesses of the sixth lens L6 and the first lens L1 on the optical axis, the size of the optical lens 100 can be effectively reduced to avoid the optical lens 100 from being too large in volume, and the assembly difficulty of the lens can also be reduced and a high space utilization rate can be achieved.

[0097] In one embodiment, the optical lens 100 satisfies the relation -25 < SD8 / SAG8 < -5, where SAG8 is the distance from the intersection of the image side 42 of the fourth lens L4 and the optical axis to the maximum effective aperture of the image side 42 of the fourth lens L4 on the optical axis. By controlling the ratio relationship between the maximum effective semi-aperture and the sagitta of the image side 42 of the fourth lens L4, it is beneficial to control the smooth trend of the edge region of the surface shape of the fourth lens L4 and reduce the deflection angle of the marginal rays.

[0098] In one embodiment, the optical lens 100 satisfies the relation 1 < |SAG9 / SAG10| < 4, where SAG9 is the distance from the intersection of the object side 51 of the fifth lens L5 and the optical axis to the maximum effective aperture of the object side 51 of the fifth lens L5 on the optical axis, and SAG10 is the distance from the intersection of the image side 52 of the fifth lens L5 and the optical axis to the maximum effective aperture of the image side 52 of the fifth lens L5 on the optical axis. This is beneficial to enabling the fifth lens L5 to collect light rays, making the light rays smoothly transition to the rear, and can effectively reduce the aberration of the optical lens 100 and improve the imaging quality of the optical lens 100.

[0099] In one embodiment, the optical lens 100 satisfies the relation 0.8 < F1 / F < 1. The optical lens 100 satisfying this relation can enable the first lens L1 to have an appropriate positive refractive power and achieve the telephoto function of the optical lens 100.

[0100] In one embodiment, the optical lens 100 satisfies the relation -0.8 < F2 / F < -0.5, where F2 is the focal length of the second lens L2. By controlling the ratio F2 / F to satisfy the above relation, the overall length of the optical lens 100 can be effectively reduced, and at the same time, the refractive power of the second lens L2 can be ensured to be within a reasonable range, effectively improving the balance effect of paraxial aberrations when light converges, thereby improving the imaging quality.

[0101] In one embodiment, the optical lens 100 satisfies the relation 5 < |F3 / F| < 30, where F3 is the focal length of the third lens L3. By reasonably selecting the focal length of the third lens L3, the telephoto characteristics of the optical lens 100 can be satisfied while correcting aberrations.

[0102] In one embodiment, the optical lens 100 satisfies the relation 0.8 < F4 / F < 1.5, where F4 is the focal length of the fourth lens L4. Controlling the positive refractive power of the fourth lens L4 within a reasonable range can increase the overall focal length of the optical lens 100 and at the same time has the effect of balancing field curvature.

[0103] In one embodiment, the optical lens 100 satisfies the relation 0.5 < F5 / F < 3, where F5 is the focal length of the fifth lens L5. By reasonably setting the focal length of the fifth lens L5 to ensure that the refractive power of the fifth lens L5 is negative, the optical lens 100 can have the function of adjusting the light position and can better balance field curvature.

[0104] In one embodiment, the optical lens 100 satisfies the relation -0.8 < F6 / F < -0.5. By controlling the ratio between the focal length of the sixth lens L6 and the focal length of the optical lens 100, it is beneficial to improve the matching with the chip, achieve high resolution, and ensure the miniaturization of the optical lens 100.

[0105] In one embodiment, the optical lens 100 may further satisfy the relational expressions: 4 < R2 / R1 < 30, R3 / R4 > -10, 0.8 < R6 / R5 < 1.5, -5 < R8 / R7 < 0, 1 < |R10 / R9| < 5, -50 < R12 / R11 < 0, where R1 is the curvature radius of the object side surface 11 of the first lens L1 on the optical axis, R2 is the curvature radius of the image side surface 12 of the first lens L1 on the optical axis, R3 is the curvature radius of the object side surface 21 of the second lens L2 on the optical axis, R4 is the curvature radius of the image side surface 22 of the second lens L2 on the optical axis, R5 is the curvature radius of the object side surface 31 of the third lens L3 on the optical axis, R6 is the curvature radius of the image side surface 32 of the third lens L3 on the optical axis, R7 is the curvature radius of the object side surface 41 of the fourth lens L4 on the optical axis, R8 is the curvature radius of the image side surface 42 of the fourth lens L4 on the optical axis, R9 is the curvature radius of the object side surface 51 of the fifth lens L5 on the optical axis, R10 is the curvature radius of the image side surface 52 of the fifth lens L5 on the optical axis, R11 is the curvature radius of the object side surface 61 of the sixth lens L6 on the optical axis, and R12 is the curvature radius of the image side surface 62 of the sixth lens L6 on the optical axis. By reasonably matching the ratio relationships between the curvature radii of the object side surfaces and the image side surfaces of each lens on the optical axis, the surface type differences of each lens are set reasonably, which is beneficial to controlling the shapes of each lens, correcting the aberrations generated by itself, and improving the imaging quality.

[0106] The optical lens 100 of this embodiment will be described in detail below in conjunction with specific parameters.

[0107] Embodiment 1

[0108] Figure 1 FIG. 10 is a schematic structural diagram of the optical lens 100 disclosed in Embodiment 1 of the present application. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a diaphragm 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter 110, and a protective glass 120, which are sequentially arranged along the optical axis from the object side to the image side. Among them, the first lens L1 has a positive refractive power. The object side surface 11 of the first lens L1 is a convex surface near the optical axis, and the image side surface 12 of the first lens L1 is a concave surface near the optical axis. The second lens L2 has a negative refractive power. The object side surface 21 and the image side surface 22 of the second lens L2 are both concave surfaces near the optical axis. The third lens L3 has a negative refractive power. The object side surface 31 of the third lens L3 is a concave surface near the optical axis, and the image side surface 32 of the third lens L3 is a convex surface near the optical axis. The fourth lens L4 has a positive refractive power. The object side surface 41 and the image side surface 42 of the fourth lens L4 are both convex surfaces near the optical axis. The fifth lens L5 has a positive refractive power. The object side surface 51 and the image side surface 52 of the fifth lens L5 are both convex surfaces near the optical axis. The sixth lens L6 has a negative refractive power. The object side surface 61 and the image side surface 62 of the sixth lens L6 are both concave surfaces near the optical axis.

[0109] Specifically, taking the focal length F=16.4867mm of the optical lens 100, the aperture number FNO=2.02 of the optical lens 100, and half of the maximum field angle HFOV=16.2848deg of the optical lens 100 as an example, other 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 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 1 and 2 correspond to the object side surface 11 and the image side surface 12 of the first lens L1, respectively. The Y radius in Table 1 is the radius of curvature of the object side surface or the image side surface 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 surface of the lens to the next surface on the optical axis. The value of the aperture 102 in the "Thickness" parameter column is the distance from the aperture 102 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 102 is set on the image side of the next surface vertex. If the thickness of the aperture 102 is a positive value, the aperture 102 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 587.5618nm, and the focal length is obtained at a reference wavelength of 550nm.

[0110] Table 1

[0111]

[0112]

[0113] Figure 2 It is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 1 of the present application. Figure 2 (A) in FIG. 1 is a spherical aberration diagram of the optical lens 100 at wavelengths of 660 nm, 590 nm, 550 nm, 510 nm, and 435 nm. The horizontal axis along the X-axis represents the focus offset in mm, and the vertical axis along the Y-axis represents the normalized field of view. Figure 2 As can be seen from (A) in the figure, the spherical aberration value of the optical lens 100 in Example 1 is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0114] Figure 2(B) is the astigmatism diagram of the optical lens 100 in Example 1 at a wavelength of 550nm. 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 image height, in mm. T in the astigmatism diagram 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.

[0115] Figure 2 (C) is a distortion diagram of the optical lens 100 in Example 1 at a wavelength of 550 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.

[0116] Example 2

[0117] Figure 3 This is a schematic diagram of the structure of the optical lens 100 disclosed in Example 2 of the present application. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter 110 and a protective glass 120, which are arranged in sequence from the object side to the image side along the optical axis. The first lens L1 has positive refractive power, an object-side surface 11 of the first lens L1 is convex at the near optical axis, and an image-side surface 12 of the first lens L1 is concave at the near optical axis; the second lens L2 has negative refractive power, an object-side surface 21 and an image-side surface 22 of the second lens L2 are both concave at the near optical axis; the third lens L3 has positive refractive power, an object-side surface 31 of the third lens L3 is both concave at the near optical axis, and an image-side surface 32 of the third lens L3 is both convex at the near optical axis; the fourth lens L4 has positive refractive power, an object-side surface 41 and an image-side surface 42 of the fourth lens L4 are both convex at the near optical axis; the fifth lens L5 has positive refractive power, an object-side surface 51 of the fifth lens L5 is convex at the near optical axis, and an image-side surface 52 of the fifth lens L5 is concave at the near optical axis; the sixth lens L6 has negative refractive power, an object-side surface 61 and an image-side surface 62 of the sixth lens L6 are both concave at the near optical axis.

[0118] Specifically, taking the focal length F of the optical lens 100 = 16.6791 mm, the aperture number FNO of the optical lens 100 = 2, and half of the maximum field angle HFOV of the optical lens 100 = 16.062 degrees as an example, other parameters of the optical lens 100 are given in Table 2 below. The definitions of each parameter can be obtained from the description of the aforementioned embodiment, and are not repeated here. The refractive index, Abbe number, etc. in Table 2 are all obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 550 nm.

[0119] Table 2

[0120]

[0121]

[0122] Figure 4 (A) is a spherical aberration diagram of the optical lens 100 disclosed in Example 2 of the present application at wavelengths of 660nm, 590nm, 550nm, 510nm, 450nm, and 415nm, Figure 4 (B) and (C) are respectively the light astigmatism diagram and distortion diagram of the optical lens 100 in Example 2 at a wavelength of 550nm. Figure 4 It can be seen from the (A) spherical aberration diagram, (B) light astigmatism diagram, and (C) distortion diagram that the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality.

[0123] Example 3

[0124] Figure 5 This is a schematic diagram of the structure of the optical lens 100 disclosed in Example 3 of the present application. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter 110 and a protective glass 120, which are arranged in sequence from the object side to the image side along the optical axis. The first lens L1 has positive refractive power, an object-side surface 11 of the first lens L1 is convex at the near optical axis, and an image-side surface 12 of the first lens L1 is concave at the near optical axis; the second lens L2 has negative refractive power, an object-side surface 21 and an image-side surface 22 of the second lens L2 are both concave at the near optical axis; the third lens L3 has positive refractive power, an object-side surface 31 of the third lens L3 is both concave at the near optical axis, and an image-side surface 32 of the third lens L3 is both convex at the near optical axis; the fourth lens L4 has positive refractive power, an object-side surface 41 and an image-side surface 42 of the fourth lens L4 are both convex at the near optical axis; the fifth lens L5 has positive refractive power, an object-side surface 51 and an image-side surface 52 of the fifth lens L5 are both convex at the near optical axis; the sixth lens L6 has negative refractive power, an object-side surface 61 and an image-side surface 62 of the sixth lens L6 are both concave at the near optical axis.

[0125] Specifically, taking the focal length F of the optical lens 100 = 16.5752 mm, the aperture number FNO of the optical lens 100 = 2, and half of the maximum field angle HFOV of the optical lens 100 = 16.0249 degrees as an example, other parameters of the optical lens 100 are given in Table 3 below. The definition of each parameter can be obtained from the description of the aforementioned embodiment, and will not be repeated here. The refractive index, Abbe number, etc. in Table 3 are all obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 550 nm.

[0126] Table 3

[0127]

[0128] Figure 6 (A) is a spherical aberration diagram of the optical lens 100 disclosed in Example 3 of the present application at wavelengths of 660nm, 590nm, 550nm, 510nm, and 450nm, Figure 6 (B) and (C) are respectively the light astigmatism diagram and distortion diagram of the optical lens 100 in Example 3 at a wavelength of 550nm. Figure 6 It can be seen from the (A) spherical aberration diagram, (B) light astigmatism diagram, and (C) distortion diagram that the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality.

[0129] Example 4

[0130] Figure 7 This is a schematic diagram of the structure of the optical lens 100 disclosed in Example 4 of the present application. Taking the focal length F of the optical lens 100 = 16.6368 mm, the aperture number FNO of the optical lens 100 = 2.02, and half of the maximum field angle HFOV of the optical lens 100 = 16.0295 deg as examples, other parameters of the optical lens 100 are given in the following Table 4. The definition of each parameter can be derived from the description of the aforementioned embodiment and will not be repeated here. The refractive index, Abbe number, etc. in Table 4 are all obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 550 nm. In addition, regarding the refractive power of each lens and the corresponding relationship between each face number and the object side and image side of each lens, please refer to the aforementioned Example 3, which will not be repeated here.

[0131] Table 4

[0132]

[0133]

[0134] Figure 8is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 4 of the present application. Figure 8 It can be seen from the spherical aberration diagram (A), the light astigmatism diagram (B), and the distortion 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 Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0135] Example 5

[0136] Fig. 9 This is a schematic diagram of the structure of the optical lens 100 disclosed in Example 5 of the present application. Taking the focal length F of the optical lens 100 = 16.5055 mm, the aperture number FNO of the optical lens 100 = 2.02, and half of the maximum field angle HFOV of the optical lens 100 = 15.9829 deg as examples, other parameters of the optical lens 100 are given in the following Table 5. The definition of each parameter can be derived from the description of the aforementioned embodiment and will not be repeated here. The refractive index, Abbe number, etc. in Table 5 are all obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 550 nm. In addition, regarding the refractive power of each lens and the corresponding relationship between each face number and the object side and image side of each lens, please refer to the aforementioned Example 3, which will not be repeated here.

[0137] Table 5

[0138]

[0139]

[0140] Fig.10 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 5 of the present application. Fig.10 It can be seen from the spherical aberration diagram (A), the light astigmatism diagram (B), and the distortion 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 Example 1. Figure 2 (A) Figure 2(B) Figure 2 The contents described in (C) will not be repeated here.

[0141] Example 6

[0142] Fig.11 This is a schematic diagram of the structure of the optical lens 100 disclosed in Example 6 of the present application. Taking the focal length F=14mm of the optical lens 100, the aperture number FNO=2 of the optical lens 100, and half of the maximum field angle HFOV=18.9785deg of the optical lens 100 as an example, other parameters of the optical lens 100 are given in the following Table 6. The definition of each parameter can be derived from the description of the aforementioned embodiment and will not be repeated here. The refractive index, Abbe number, etc. in Table 6 are all obtained at a reference wavelength of 587.5618nm, and the focal length is obtained at a reference wavelength of 550nm. In addition, regarding the refractive power of each lens and the corresponding relationship between each face number and the object side and image side of each lens, please refer to the aforementioned Example 3, which will not be repeated here.

[0143] Table 6

[0144]

[0145] Fig.12 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 6 of the present application. Fig.10 It can be seen from the spherical aberration diagram (A), the light astigmatism diagram (B), and the distortion 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 Example 2. Figure 4 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0146] Example 7

[0147] Fig.13This is a schematic diagram of the structure of the optical lens 100 disclosed in Example 7 of the present application. Taking the focal length F of the optical lens 100 = 16.6775 mm, the aperture number FNO of the optical lens 100 = 1.75, and half of the maximum field angle HFOV of the optical lens 100 = 16.0646 degrees as examples, other parameters of the optical lens 100 are given in the following Table 7. The definition of each parameter can be derived from the description of the aforementioned embodiment and will not be repeated here. The refractive index, Abbe number, etc. in Table 7 are all obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 550 nm. In addition, regarding the refractive power of each lens and the corresponding relationship between each face number and the object side and image side of each lens, please refer to the aforementioned Example 3, which will not be repeated here.

[0148] Table 7

[0149]

[0150] Fig.14 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 7 of the present application. Fig.10 It can be seen from the spherical aberration diagram (A), the light astigmatism diagram (B), and the distortion 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.14 (A) Fig.14 (B) and Fig.14 The wavelengths corresponding to the curves in (C) can be referred to in Example 2. Figure 4 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0151] Please refer to Table 8, which is a summary of the ratios of the various relationship equations in Examples 1 to 7 of the present application.

[0152] Table 8

[0153]

[0154]

[0155] See also Fig.15The 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 embodiments 1 to 7 above, and the image sensor 201 is arranged on the image side of the optical lens 100. Specifically, 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 miniaturization while making the optical lens 100 have good imaging quality. 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.

[0156] 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, a vehicle-mounted device, a drone, a monitor, etc. Fig.16 , taking the terminal device 300 as a vehicle as an example, in this case, the housing 301 can be a vehicle body, and the camera module 200 can be arranged on the vehicle body, for example, it can be arranged inside the vehicle body or outside the vehicle body. It can be understood that the terminal device 300 having the above-mentioned camera module 200 also has all the technical effects of the above-mentioned optical lens 100. That is, the terminal device 300 can meet the design requirements of miniaturization while making the optical lens 100 have good imaging quality. Since the above-mentioned technical effects have been described in detail in the embodiment of the optical lens 100, they will not be repeated here.

[0157] 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: There are a total of six lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis; The first lens has a positive refractive power. The object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis; The second lens has a negative refractive power. Both the object side surface and the image side surface of the second lens are concave near the optical axis; The third lens has refractive power. The object side surface of the third lens is concave near the optical axis, and the image side surface of the third lens is convex near the optical axis; The fourth lens has a positive refractive power. Both the object side surface and the image side surface of the fourth lens are convex near the optical axis; The fifth lens has a positive refractive power. The object side surface of the fifth lens is convex near the optical axis; The sixth lens has a negative refractive power. Both the object side surface and the image side surface of the sixth lens are concave near the optical axis; The optical lens satisfies the following relationship: 15deg < HFOV < 20deg, FNO < 2.1; Wherein, HFOV is half of the maximum field of view angle of the optical lens, and FNO is the f-number of the optical lens.

2. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 5.5 < TTL / IMGH < 7, and / or, 1.7 < TTL / F < 1.9, and / or, 3 < F / IMGH < 4; Wherein, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical lens, 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.

3. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: |F12 / F| < 20, and / or, |F56 / F| < 30, and / or, -2 < F1 / F6 < -1.1; Wherein, F12 is the combined focal length of the first lens and the second lens, F56 is the combined focal length of the fifth lens and the sixth lens, F1 is the focal length of the first lens, and F6 is the focal length of the sixth lens.

4. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 0.5 < F5 / F < 3, and / or, 3 < F5 / CT5 < 20, and / or, 1 < CT5 / ET5 < 3; Wherein, F5 is the focal length of the fifth lens, CT5 is the thickness of the fifth lens on the optical axis, and ET5 is the distance in the optical axis direction from the maximum effective aperture of the object side surface of the fifth lens to the maximum effective aperture of the image side surface of the fifth lens.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 1.1 < SD8 / SD5 < 1.3, and / or, 1.1 < CT2 / SAG4 < 2.1, and / or, 1.1 < ET6 / CT6 < 1.25; Wherein, SD5 is half of the maximum effective aperture of the object side of the third lens, SD8 is half of the maximum effective aperture of the image side of the fourth lens, CT2 is the thickness of the second lens on the optical axis, SAG4 is the distance from the intersection of the image side of the second lens and the optical axis to the position of the maximum effective aperture of the image side of the second lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and ET6 is the distance in the optical axis direction from the position of the maximum effective aperture of the object side of the sixth lens to the position of the maximum effective aperture of the image side of the sixth lens.

6. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 5 <CT MAX / CT MIN <7.5, and / or, 1.5 <CT6 / CT1<2; Among them, CT MAX is the maximum thickness of the first lens to the sixth lens on the optical axis, CT MIN is the minimum thickness of the first lens to the sixth lens on the optical axis, CT1 is the thickness of the first lens on the optical axis, and CT6 is the thickness 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 expressions: -5 < R8 / R7 < 0, and / or, -25 < SD8 / SAG8 < -5; Wherein, R7 is the curvature radius of the object side of the fourth lens on the optical axis, R8 is the curvature radius of the image side of the fourth lens on the optical axis, SD8 is half of the maximum effective aperture of the image side of the fourth lens, and SAG8 is the distance from the intersection of the image side of the fourth lens and the optical axis to the position of the maximum effective aperture of the image side of the fourth lens on the optical axis.

8. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 7.5deg < HFOV / FNO < 9.5deg, and / or, 1 < |SAG9 / SAG10| < 4, and / or, 1.45 < CT1 / ET1 < 1.7; Wherein, SAG9 is the distance from the intersection of the object side of the fifth lens and the optical axis to the position of the maximum effective aperture of the object side of the fifth lens on the optical axis, SAG10 is the distance from the intersection of the image side of the fifth lens and the optical axis to the position of the maximum effective aperture of the image side of the fifth lens on the optical axis, CT1 is the thickness of the first lens on the optical axis, and ET1 is the distance in the optical axis direction from the position of the maximum effective aperture of the object side of the first lens to the position of the maximum effective aperture of the image side of the first lens.

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

10. A terminal device, characterized in that: The terminal device includes a housing and the imaging module according to claim 9, and the imaging module is disposed in the housing.

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