Optical lens, camera module and terminal device

Abstract

The application discloses an optical lens, a camera module and a terminal device. The optical lens comprises six lenses with refractive power. The first lens has negative refractive power, and the object side surface and the image side surface of the first lens are a convex surface and a concave surface respectively. The second lens has negative refractive power, and the object side surface and the image side surface of the second lens are a convex surface and a concave surface respectively. The third lens has positive refractive power, and the object side surface and the image side surface of the third lens are both convex surfaces. The image side surface of the fourth lens is a convex surface. The fifth lens has negative refractive power, and the object side surface and the image side surface of the fifth lens are both concave surfaces. The sixth lens has positive refractive power, and the object side surface and the image side surface of the sixth lens are both convex surfaces. The optical lens satisfies the following relationship: 90deg < HFOV < 110deg, 6 < TTL / IMGH < 7, and 2 < IMGH / F < 2.4. The optical lens can have high imaging quality, a large field of view and small size.

Description

TECHNICAL FIELD

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

[0002] With the development of various optical lenses towards the design trend of lightness, thinness, smallness, the requirement for imaging quality is also higher and higher. Among them, the wide-angle lens, as a lens capable of shooting the camera range with a wider view angle, is widely used in camera modules such as monitoring or vehicle-mounted.

[0003] However, the current wide-angle lens has a large overall volume, which is not conducive to the realization of miniaturized design, and the field angle of the lens is not large enough, and the imaging quality is low, which can easily lead to problems such as too small shooting monitoring range, many shooting dead angles, etc., and cannot meet the requirements of intelligent vehicle-mounted, monitoring system and other fields for optical lenses with large field angle and high imaging quality. SUMMARY

[0004] 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 having high imaging quality and large field angle.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, the present application discloses an optical lens, which has 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 order along the optical axis from the object side to the image side.

[0006] The first lens has negative refractive power, and 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.

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

[0008] The third lens has positive refractive power, and the object side surface and the image side surface of the third lens are both convex at the near optical axis.

[0009] The fourth lens has refractive power, and the image side surface of the fourth lens is convex at the near optical axis.

[0010] The fifth lens has negative refractive power, and the object side surface and the image side surface of the fifth lens are both concave at the near optical axis.

[0011] The sixth lens has positive refractive power, and the object side surface and the image side surface of the sixth lens are both convex at the near optical axis.

[0012] The optical lens satisfies the following relationship:

[0013] 90deg<HFOV<110deg, 6<TTL / IMGH<7, 2<IMGH / F<2.4;

[0014] wherein, HFOV is half of the maximum field of view angle of the optical lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis (i.e., 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.

[0015] In the optical lens provided by the present application, in order to have high imaging quality, a large field of view angle, and at the same time meet the design requirement of miniaturization, the refractive power and surface shape of the six lenses are reasonably set, i.e., the first lens is set to have negative refractive power, and the object side surface and the image side surface thereof are respectively designed to be convex and concave near the optical axis, which is beneficial to collect more light into the optical lens and realize wide-angle of the optical lens; the second lens has negative refractive power, and the object side surface and the image side surface thereof are respectively designed to be convex and concave near the optical axis, which is beneficial to the light entering the optical lens gently, so as to correct the distortion of the optical lens and realize high imaging quality; the third lens has positive refractive power, and the object side surface and the image side surface thereof are both designed to be convex near the optical axis, which is beneficial to correct the field curvature and improve the imaging quality; the image side surface of the fourth lens is convex near the optical axis, the fifth lens has negative refractive power, and the object side surface and the image side surface thereof are both designed to be concave near the optical axis, and the image side surface is designed to be concave near the optical axis, which is beneficial to make the incident light at a large angle enter the fifth lens gently; the sixth lens has positive refractive power, and the object side surface and the image side surface thereof are both designed to be convex near the optical axis, which is beneficial to reduce the chromatic aberration of the optical lens, and at the same time, is beneficial to converge the light and reduce the total length of the optical lens, and further realize the miniaturization design of the optical lens.

[0016] In addition, by limiting the optical lens to satisfy the relationship 90deg<HFOV<110deg, the optical lens can be provided with sufficient field of view angle, and has the imaging characteristics of a large field of view angle.

[0017] The optical lens satisfies the relationship 6<TTL / IMGH<7, by controlling the ratio of the total length of the optical lens to the half image height of the optical lens, which is beneficial to control the total length of the optical lens, and further is beneficial to realize the miniaturization design of the optical lens.

[0018] The optical lens satisfies a relationship 2IMGH / F<2.4, which is beneficial to the optical lens to meet the imaging requirement of high definition while having large depth of field, and is also beneficial to expand the field of view angle of the optical lens and realize wide-range shooting. When the optical lens exceeds the upper limit of the above relationship, the focal length of the optical lens is too short, the depth of field is too deep, and the shooting clarity of a distant scene is not enough, which affects the imaging effect. When the optical lens is lower than the lower limit of the above relationship, the focal length of the optical lens is too long, which is not conducive to the wide-angle of the optical lens, and it is difficult to shoot a large range of scenes.

[0019] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0020] 13.5TTL / F<15, and / or, 1.9FNO<2.1, and / or, 75deg / mm<HFOV / F<100deg / mm;

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

[0022] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0023] -4<(F1+F2) / F3<-2, and / or, |F4 / F5|<40, and / or, 0<F123 / F456<25;

[0024] Wherein, F1 is the focal length of the first lens, F2 is the focal length of the second lens, 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, F123 is the combined focal length of the first lens, the second lens and the third lens, and F456 is the combined focal length of the fourth lens, the fifth lens and the sixth lens.

[0025] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0026] 2.5<SD1 / IMGH<3, and / or, 1.45<SD2 / CT12<1.7, and / or, -2.5<SD8 / SAG8<-1.8;

[0027] CT12 / CT2<3, and / or, 3.5 < SAG4 / SAG3 < 9, and / or, 4 < R3 / R4 < 17;

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

[0029] 1.9 < CT3 / CT4 < 3.2, and / or, 2.3 < CT6 / ET6 < 3.2, and / or, 1.7 < CTAL / (CT3+CT4) < 2.2;

[0030] CT3 is the thickness of the third lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, ET6 is the distance between the maximum effective half aperture of the object side of the sixth lens and the maximum effective half aperture of the image side of the sixth lens in the direction parallel to the optical axis (i.e. the edge thickness of the sixth lens), and CTAL is the sum of the thicknesses of all lenses from the first lens to the sixth lens on the optical axis.

[0031] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0032] 2.4 < CT12 / CT2 < 3, and / or, 3.5 < SAG4 / SAG3 < 9, and / or, 4 < R3 / R4 < 17;

[0033] CT12 is the distance between the image side of the first lens and the object side of the second lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, SAG3 is the distance between the intersection of the object side of the second lens and the optical axis and the maximum effective aperture of the object side of the second lens on the optical axis, SAG4 is the distance between the intersection of the image side of the second lens and the optical axis and the maximum effective aperture of the image side of the second lens on the optical axis, R3 is the radius of curvature of the object side of the second lens at the optical axis, and R4 is the radius of curvature of the image side of the second lens at the optical axis.

[0034] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0035] -4 < F2 / CT2 < -2.5, and / or, 1.4 < F6 / CT6 < 1.9, and / or, 1.1 < CT6 / CT4 < 1.4;

[0036] F2 / CT2 < -2.5, and / or, 1.4 < F6 / CT6 < 1.9, and / or, 1.1 < CT6 / CT4 < 1.4, wherein F2 is a focal length of the second lens, CT2 is a thickness of the second lens on the optical axis, F6 is a focal length of the sixth lens, CT4 is a thickness of the fourth lens on the optical axis, and CT6 is a thickness of the sixth lens on the optical axis.

[0037] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0038] 5 < CT3 / (|SAG5|+|SAG6|) < 12, and / or, -3 < CT6 / SAG12 < -1.5;

[0039] F2 / CT2 < -2.5, and / or, 1.4 < F6 / CT6 < 1.9, and / or, 1.1 < CT6 / CT4 < 1.4, wherein CT3 is a thickness of the third lens on the optical axis, CT6 is a thickness of the sixth lens on the optical axis, SAG5 is a distance from the intersection of the object side of the third lens and the optical axis to the maximum effective aperture of the object side of the third lens on the optical axis, SAG6 is a distance from the intersection of the image side of the third lens and the optical axis to the maximum effective aperture of the image side of the third lens on the optical axis, and SAG12 is a distance from the intersection of the image side of the sixth lens and the optical axis to the maximum effective aperture of the image side of the sixth lens on the optical axis.

[0040] In a second aspect, the present application discloses a camera module, comprising an image sensor and the optical lens according to the first aspect, wherein the image sensor is arranged on the image side of the optical lens.

[0041] In a third aspect, the present application discloses a terminal device, comprising a housing and the camera module according to the second aspect, wherein the camera module is arranged on the housing.

[0042] Compared with the prior art, the present application has the following beneficial effects:

[0043] The optical lens provided in the application can have high imaging quality, a large field of view, and meet the design requirement of miniaturization. The refractive power and surface shape of six lenses are reasonably set. The first lens is set to have negative refractive power, and the object side surface and the image side surface thereof are respectively designed as a convex surface and a concave surface near the optical axis, which is beneficial to collecting more light into the optical lens and realizing wide-angle of the optical lens. The second lens has negative refractive power, and the object side surface and the image side surface thereof are respectively designed as a convex surface and a concave surface near the optical axis, which is beneficial to the light entering the optical lens gently, thereby correcting the distortion of the optical lens and realizing high imaging quality. The third lens has positive refractive power, and the object side surface and the image side surface thereof are both designed as a convex surface near the optical axis, which is beneficial to correcting the field curvature and improving the imaging quality. The image side surface of the fourth lens is a convex surface near the optical axis, the fifth lens has negative refractive power, and the object side surface and the image side surface thereof are both designed as a concave surface near the optical axis, and the image side surface is designed as a concave surface near the optical axis, which is beneficial to making the incident light at a large angle enter the fifth lens gently. The sixth lens has positive refractive power, and the object side surface and the image side surface thereof are both designed as a convex surface near the optical axis, which is beneficial to reducing the chromatic aberration of the optical lens, collecting light, reducing the total length of the optical lens, and further realizing the miniaturization design of the optical lens.

[0044] In addition, by limiting the optical lens to satisfy the relationship 90deg < HFOV < 110deg, the optical lens can provide sufficient field of view and have the imaging characteristics of a large field of view.

[0045] The optical lens satisfies the relationship 6 < TTL / IMGH < 7. By controlling the ratio of the total length of the optical lens to the half image height of the optical lens, the total length of the optical lens is controlled, and the miniaturization design of the optical lens is realized.

[0046] The optical lens satisfies the relationship 2 < IMGH / F < 2.4. The optical lens has a large depth of field and satisfies the imaging requirement of high definition, and the field of view of the optical lens is also expanded to realize wide-range shooting. When the optical lens exceeds the upper limit of the above relationship, the focal length of the optical lens is too short, the depth of field is too deep, the shooting clarity of a distant scene is not enough, and the imaging effect is affected. When the optical lens is lower than the lower limit of the above relationship, the focal length of the optical lens is too long, which is not conducive to the wide-angle of the optical lens, and it is difficult to shoot a large range of scenes. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0048] Figure 1 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 1 of this application;

[0049] Figure 2 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 1 of this application;

[0050] Figure 3 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 2 of this application;

[0051] Figure 4 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 2 of this application;

[0052] Figure 5 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 3 of this application;

[0053] Figure 6 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 3 of this application;

[0054] Figure 7 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 4 of this application;

[0055] Figure 8 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 4 of this application;

[0056] Figure 9 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 5 of this application;

[0057] Figure 10 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 5 of this application;

[0058] Figure 11 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 6 of this application;

[0059] Figure 12 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 5 of this application;

[0060] Figure 13 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 7 of this application;

[0061] Figure 14 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 7 of this application;

[0062] Figure 15is a structural schematic diagram of a camera module disclosed in the present application;

[0063] Figure 16 is a structural schematic diagram of a terminal device as a mobile phone disclosed in the present application;

[0064] Figure 17 is a structural schematic diagram of a terminal device as a car disclosed in the present application. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0066] In the present application, the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific position, or to be constructed and operated in a specific position.

[0067] In addition, in addition to being used to represent the position or location relationship, the above-mentioned part of the terms can also be used to represent other meanings, for example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meanings of these terms in the present application according to the specific circumstances.

[0068] In addition, the terms "set", "provided with" should be understood broadly. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication between two devices, elements or components. Those of ordinary skill in the art can understand the specific meanings of the above-mentioned terms in the present application according to the specific circumstances.

[0069] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific types and structures can 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 stated, the meaning of "multiple" is two or more.

[0070] The technical solutions of the present application will be further described in combination with the embodiments and drawings.

[0071] Please refer to Figure 1The optical lens 100 provided in the present application can realize high imaging quality and a large field of view while meeting the design requirement of miniaturization. The refractive power and surface shape of the six lenses are reasonably set, that is, the first lens L1 is set to have negative refractive power, and the object side surface and the image side surface thereof are respectively designed to be convex and concave near the optical axis, which is beneficial to collect more light into the optical lens 100 and realize wide-angle of the optical lens 100; the second lens L2 has negative refractive power, and the object side surface and the image side surface thereof are respectively designed to be convex and concave near the optical axis, which is beneficial to the light entering the optical lens 100 gently, thereby correcting the distortion of the optical lens 100 and realizing high imaging quality; the third lens L3 has positive refractive power, and the object side surface and the image side surface thereof are both designed to be convex near the optical axis, which is beneficial to correct the field curvature and improve the imaging quality; the image side surface of the fourth lens L4 is convex near the optical axis, the fifth lens L5 has negative refractive power, and the object side surface and the image side surface thereof are both designed to be concave near the optical axis, which is beneficial to make the incident light at a large angle enter the fifth lens L5 gently; the sixth lens L6 has positive refractive power, and the object side surface and the image side surface thereof are both designed to be convex near the optical axis, which is beneficial to reduce the chromatic aberration of the optical lens 100, and also beneficial to converge the light and reduce the total length of the optical lens 100, thereby further realizing the miniaturization design of the optical lens 100.

[0072] Further, the object side surface 11 of the first lens L1 is convex near the optical axis, the image side surface 12 of the first lens L1 is concave near the optical axis, the object side surface 21 of the second lens L2 is convex near the optical axis, the image side surface 22 of the second lens L2 is concave near the optical axis, the object side surface 31 and the image side surface 32 of the third lens L3 are both convex near the optical axis, the object side surface 41 of the fourth lens L4 can be convex or concave near the optical axis, the image side surface 42 of the fourth lens L4 is convex near the optical axis, the object side surface 51 and the image side surface 52 of the fifth lens L5 are both concave near the optical axis, and the object side surface 61 and the image side surface 62 of the sixth lens L6 are both convex near the optical axis.

[0073] Further, the object side surface 11 of the first lens L1 is convex near the optical axis, the image side surface 12 of the first lens L1 is concave near the optical axis, the object side surface 21 of the second lens L2 is convex near the optical axis, the image side surface 22 of the second lens L2 is concave near the optical axis, the object side surface 31 and the image side surface 32 of the third lens L3 are both convex near the optical axis, the object side surface 41 of the fourth lens L4 can be convex or concave near the optical axis, the image side surface 42 of the fourth lens L4 is convex near the optical axis, the object side surface 51 and the image side surface 52 of the fifth lens L5 are both concave near the optical axis, and the object side surface 61 and the image side surface 62 of the sixth lens L6 are both convex near the optical axis.

[0074] Optionally, all of the seven lenses can be plastic lenses, so that the optical lens 100 is relatively light and convenient for processing of complex surface shapes. Alternatively, all of the seven lenses can be glass lenses, or some lenses can be plastic lenses and some lenses can be glass lenses.

[0075] Preferably, the first lens L1 and the third lens L3 can be made of glass, and the second lens L2, the fourth lens L4, the fifth lens L5 and the sixth lens L6 can be made of plastic. By using a glass-plastic hybrid architecture, the advantages of plastic lenses and glass lenses can be combined, so that the optical lens 100 has good optical effect, reduces the temperature sensitivity of the optical lens 100, reduces the overall weight of the optical lens 100, and reduces the production cost of the optical lens 100.

[0076] Optionally, the first lens L1 and the third lens L3 can be spherical lenses, and the second lens L2, the fourth lens L4, the fifth lens L5 and the sixth lens L6 can be aspherical lenses. The combination of spherical lenses and aspherical lenses can improve high-order aberrations and improve the imaging quality of the optical lens 100.

[0077] In some embodiments, the optical lens 100 further comprises a stop 102, which can be an aperture stop and / or a field stop, and can be arranged between the image side 32 of the third lens L3 and the object side 41 of the fourth lens L4 of the optical lens 100. It can be understood that in other embodiments, the stop 102 can also be arranged between other lenses, and the arrangement is adjusted according to the actual situation, which is not limited in the present embodiment.

[0078] In some embodiments, the optical lens 100 further comprises a filter 110, which can be arranged between the image side surface 72 of the seventh lens L7 and the imaging surface 101 of the optical lens 100. Of course, in other embodiments, the filter 110 can also be arranged between other lenses, and the arrangement is adjusted according to the actual situation, and the present embodiment is not limited specifically. In the present embodiment, the filter 110 can be selected as an infrared cut-off filter, so as to filter out light of other wavebands such as infrared light, and only allow visible light to pass through, so that the imaging is more in line with the visual experience of the human eye. Of course, the filter 110 can also be selected as an infrared band-pass filter, so as to filter out light of other wavebands such as visible light, and only allow infrared light to pass through. By filtering out light of other wavebands such as visible light, the imaging quality is 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 better image effects in dim environments and other special application scenarios. Preferably, the filter 110 can be made of glass, and of course in other embodiments, the filter 110 can also be made of optical glass coating or other material filters 110, which can be selected according to actual needs, and the present embodiment is not limited specifically.

[0079] In some embodiments, the optical lens 100 further comprises a protective glass 120 arranged 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 some embodiments, the optical lens 100 satisfies the relationship 90deg < HFOV < 110deg, HFOV is half of the maximum field of view angle of the optical lens 100. By limiting the field of view angle of the optical lens 100 to satisfy the above range, the optical lens 100 can be provided with sufficient field of view angle, and has the imaging characteristics of large field of view angle.

[0081] In some embodiments, the optical lens 100 satisfies the relationship 6 < TTL / IMGH < 7, 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 the half image height of the optical lens 100, the total length of the optical lens 100 is controlled, and the miniaturization design of the optical lens 100 is facilitated.

[0082] In some embodiments, the optical lens 100 satisfies a relationship 2 < IMGH / F < 2.4, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens 100, and F is the focal length of the optical lens 100. By reasonably configuring the ratio of the half image height to the focal length of the optical lens 100, the optical lens 100 can have a large depth of field while meeting the high-definition imaging requirements, and can also expand the field of view angle of the optical lens 100 to achieve wide-range shooting. When the optical lens 100 exceeds the upper limit of the above relationship, the focal length of the optical lens 100 is too short, the depth of field is too deep, the shooting clarity of distant scenes is not enough, and the imaging effect is affected. When the optical lens 100 is lower than the lower limit of the above relationship, the focal length of the optical lens 100 is too long, which is not conducive to the wide-angle of the optical lens 100, and it is difficult to shoot a large range of scenes.

[0083] In some embodiments, the optical lens 100 satisfies a relationship 13.5 < TTL / F < 15, TTL is the distance from the object side 11 of the first lens L1 to the imaging surface 101 of the optical lens 100 on the optical axis, and F is the focal length of the optical lens 100. The focal length of the optical lens 100 and the total length of the optical lens 100 can be reasonably controlled, which not only realizes the miniaturization of the optical lens 100, but also helps to better converge light on the imaging surface 101, thereby improving the imaging quality of the optical lens 100. When the optical lens 100 is lower than the lower limit of the above relationship, the total length of the optical lens 100 is too short relative to the focal length of the optical lens 100, which easily increases the sensitivity of the optical lens 100 and is not conducive to the convergence of light on the imaging surface 101. When the optical lens 100 exceeds the upper limit of the above relationship, the total length of the optical lens 100 is too long relative to the focal length of the optical lens 100, which causes the angle of the chief ray entering the imaging surface 101 to be too large, the edge light of the optical lens 100 cannot be imaged on the imaging surface 101, resulting in incomplete imaging information and reduced imaging quality, and is not conducive to the miniaturization design of the optical lens 100.

[0084] In some embodiments, the optical lens 100 satisfies a relationship 1.9 ≤ FNO ≤ 2.1, FNO is the aperture number of the optical lens 100, so that the optical lens 100 has a large aperture characteristic, improves the light amount of the optical lens 100, and makes the optical lens 100 applicable to night or low ambient brightness scenes.

[0085] In some embodiments, the optical lens 100 satisfies a relationship 75 deg / mm < HFOV / F < 100 deg / mm, HFOV is half of the maximum field of view angle of the optical lens 100, and FNO is the aperture number of the optical lens 100. By reasonably controlling the relationship between the field of view angle and the focal length of the optical lens 100, the wide-angle of the optical lens 100 is facilitated, and wide-range shooting is achieved.

[0086] In some embodiments, the optical lens 100 satisfies a relationship of -4 < (F1+F2) / F3 < -2, F1 is the focal length of the first lens L1, F2 is the focal length of the second lens L2, and F3 is the focal length of the third lens L3. By reasonably configuring the focal lengths of the first lens L1, the second lens L2, and the third lens L3, the refractive power of the front lens group (the first lens L1, the second lens L2, and the third lens L3) can be reasonably distributed, so that the refractive power of the front lens group of the optical lens 100 is not too large, and excessive aberration is avoided when a large-angle light ray enters the optical lens 100.

[0087] In some embodiments, the optical lens 100 satisfies a relationship of |F4 / F5| < 40, F4 is the focal length of the fourth lens L4, and F5 is the focal length of the fifth lens L5. By reasonably configuring the ratio of the focal lengths of the fourth lens L4 and the fifth lens L5, the aberration can be corrected, and the imaging quality of the optical lens 100 can be improved.

[0088] In some embodiments, the optical lens 100 satisfies a relationship of 0 < F123 / F456 < 25, F123 is the combined focal length of the first lens L1, the second lens L2, and the third lens L3, and F456 is the combined focal length of the fourth lens L4, the fifth lens L5, and the sixth lens L6. Within the range of the relationship, the refractive power of the front and rear lens groups can be reasonably distributed, the aberration balance of the front and rear lens groups can be facilitated, and the effects of large aperture and large target surface of the optical lens 100 can be achieved.

[0089] In some embodiments, the optical lens 100 satisfies a relationship of 2.5 < SD1 / IMGH < 3, SD1 is half of the maximum effective aperture of the object side 11 of the first lens L1, and IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens 100. By controlling the relationship between half of the maximum effective aperture of the object side 11 of the first lens L1 and half of the image height of the optical lens 100, the image height of the optical lens 100 can be effectively controlled, and the requirements of high pixels and good image quality of the optical lens 100 can be met.

[0090] In some embodiments, the optical lens 100 satisfies a relationship of 1.45 < SD2 / CT12 < 1.7, SD2 is half of the maximum effective aperture of the image side 12 of the first lens L1, and CT12 is the distance on the optical axis from the image side 12 of the first lens L1 to the object side 21 of the second lens L2 (i.e., the air gap between the first lens L1 and the second lens L2). The tolerance sensitivity of the distance on the optical axis from the image side 12 of the first lens L1 to the object side 21 of the second lens L2 can be reduced, the risk of field curvature can be reduced, and the imaging quality of the optical lens 100 can be improved.

[0091] In some embodiments, the optical lens 100 satisfies a relationship of -2.5 < SD8 / SAG8 < -1.8, SD8 is half of the maximum effective diameter of the image side 42 of the fourth lens L4, and 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 diameter of the image side 42 of the fourth lens L4 on the optical axis (i.e., the sag of the maximum effective diameter of the image side 42 of the fourth lens L4), which can prevent the surface of the image side 42 of the fourth lens L4 from being too curved, reduce the processing difficulty of the fourth lens L4, and avoid the problem of ghosting caused by uneven coating of the image side 42 of the fourth lens L4 due to excessive curvature.

[0092] In some embodiments, the optical lens 100 satisfies a relationship of 1.9 < CT3 / CT4 < 3.2, CT3 is the thickness of the third lens L3 on the optical axis, and CT4 is the thickness of the fourth lens L4 on the optical axis, which is beneficial to reasonably match the structures of the third lens L3 and the fourth lens L4 and to make the third lens L3 and the fourth lens L4 have better processing technology.

[0093] In some embodiments, the optical lens 100 satisfies a relationship of 2.3 < CT6 / ET6 < 3.2, CT6 is the thickness of the sixth lens L6 on the optical axis, and ET6 is the distance in the direction parallel to the optical axis from the maximum effective half diameter of the object side 61 of the sixth lens L6 to the maximum effective half diameter of the image side 62 of the sixth lens L6 (i.e., the edge thickness of the sixth lens L6), which is beneficial to balance the aberration generated by the lens itself and improve the imaging quality of the optical lens 100 by reasonably controlling the ratio of the thickness of the sixth lens L6 on the optical axis to the edge thickness.

[0094] In some embodiments, the optical lens 100 satisfies a relationship of 1.1 < CT6 / CT4 < 1.4, CT4 is the thickness of the fourth lens L4 on the optical axis, and CT6 is the thickness of the sixth lens L6 on the optical axis, which can reasonably distribute the ratio of the thickness of the sixth lens L6 on the optical axis to the thickness of the fourth lens L4 on the optical axis, effectively reduce the size of the rear lens group (the fourth lens L4 to the sixth lens L6), avoid the volume of the optical lens 100 from being too large, and also reduce the assembly difficulty of the lens and achieve a high space utilization rate.

[0095] In some embodiments, the optical lens 100 satisfies a relationship 1.7 < CTAL / (CT3+CT4) < 2.2, CTAL is the sum of thicknesses of all the lenses from the first lens L1 to the sixth lens L6 on the optical axis, CT3 is the thickness of the third lens L3 on the optical axis, and CT4 is the thickness of the fourth lens L4 on the optical axis. By controlling the ratio of the sum of the thicknesses of the third lens L3 and the fourth lens L4 on the optical axis to the sum of the thicknesses of all the lenses from the first lens L1 to the sixth lens L6 on the optical axis, the proportion of the sum of the thicknesses of the third lens L3 and the fourth lens L4 to the sum of the thicknesses of all the lenses on the optical axis can be reasonably controlled, thereby facilitating the miniaturization design of the optical lens 100.

[0096] In some embodiments, the optical lens 100 satisfies a relationship 2.4 < CT12 / CT2 < 3, CT12 is the air gap between the first lens L1 and the second lens L2, and CT2 is the thickness of the second lens L2 on the optical axis. When the optical lens 100 exceeds the upper limit of the above relationship, the air gap between the first lens L1 and the second lens L2 is too large, which has the risk of increasing the field curvature. When the optical lens 100 is below the lower limit of the above relationship, the thickness of the second lens L2 on the optical axis is too large, which is not conducive to the miniaturization design of the optical lens 100.

[0097] In some embodiments, the optical lens 100 satisfies a relationship 3.5 < SAG4 / SAG3 < 9, SAG3 is the distance from the intersection of the object side surface 21 of the second lens L2 and the optical axis to the maximum effective aperture of the object side surface 21 of the second lens L2 on the optical axis (i.e., the sag of the maximum effective aperture of the object side surface 21 of the second lens L2), and SAG4 is the distance from the intersection of the image side surface 22 of the second lens L2 and the optical axis to the maximum effective aperture of the image side surface 22 of the second lens L2 on the optical axis (i.e., the sag of the maximum effective aperture of the image side surface 22 of the second lens L2). The above relationship makes the shape of the second lens L2 well controlled, which is conducive to the forming and processing of the second lens L2.

[0098] In some embodiments, the optical lens 100 satisfies a relationship 4 < R3 / R4 < 17, R3 is the radius of curvature of the object side surface 21 of the second lens L2 at the optical axis, and R4 is the radius of curvature of the image side surface 22 of the second lens L2 at the optical axis. The light can enter and exit the second lens L2 gently, which reduces the eccentricity sensitivity of the lens.

[0099] In some embodiments, the optical lens 100 satisfies a relationship 5<CT3 / (|SAG5|+|SAG6|)<12, CT3 is the thickness of the third lens L3 on the optical axis, SAG5 is the distance from the intersection of the object side surface 31 of the third lens L3 and the optical axis to the maximum effective aperture of the object side surface 31 of the third lens L3 on the optical axis (i.e., the sag of the maximum effective aperture of the object side surface 31 of the third lens L3), and SAG6 is the distance from the intersection of the image side surface 32 of the third lens L3 and the optical axis to the maximum effective aperture of the image side surface 32 of the third lens L3 on the optical axis (i.e., the sag of the maximum effective aperture of the image side surface 32 of the third lens L3), which is beneficial to control the head aperture of the third lens L3, beneficial to the smooth exit of the light rays of the third lens L3, and reduce the aberration of the optical lens 100. When the optical lens 100 exceeds the upper limit of the above relationship, the thickness of the third lens L3 is too thick, which increases the volume of the optical lens 100 as a whole. When the optical lens 100 is lower than the lower limit of the above relationship, the surface of the third lens L3 is too curved, which easily causes the deflection of the edge light rays to be too large, which is not conducive to correcting the aberration of the optical lens 100, and thus reduces the imaging quality of the optical lens 100.

[0100] In some embodiments, the optical lens 100 satisfies a relationship 3<CT6 / SAG12<-1.5, CT6 is the thickness of the sixth lens L6 on the optical axis, and SAG12 is the distance from the intersection of the image side surface 62 of the sixth lens L6 and the optical axis to the maximum effective aperture of the image side surface 62 of the sixth lens L6 on the optical axis (i.e., the sag of the maximum effective aperture of the image side surface 62 of the sixth lens L6), which can effectively control the light rays passing through the sixth lens L6 to better converge on the imaging surface 101, increase the effective light passing aperture, and be beneficial to the increase of the image surface, so as to achieve the effect of large image surface.

[0101] In some embodiments, the optical lens 100 satisfies a relationship -9<F1 / CT1<-4, F1 is the focal length of the first lens L1, and CT1 is the thickness of the first lens L1 on the optical axis. By reasonably controlling the ratio between the focal length of the first lens L1 and the thickness of the first lens L1, the refractive power of the first lens L1 is reasonably configured, the angle of the light rays entering the first lens L1 is effectively controlled, and the aberration is corrected.

[0102] In some embodiments, the optical lens 100 satisfies a relationship -4<F2 / CT2<-2.5, F2 is the focal length of the second lens L2, and CT2 is the thickness of the second lens L2 on the optical axis. Satisfying the above range, the refractive power of the second lens L2 is not too strong, which can cooperate with the first lens L1 to correct the spherical aberration, so that the optical lens 100 has good imaging quality.

[0103] In some embodiments, the optical lens 100 satisfies a relationship of 0.9 < F3 / CT3 < 1.6, where F3 is the focal length of the third lens L3, and CT3 is the thickness of the third lens L3 on the optical axis. The third lens L3 can be reasonably configured, and the deflection angle of the light in the optical lens 100 can be effectively controlled, thereby reducing the sensitivity of the optical lens 100 and improving the resolution. When the optical lens 100 exceeds the upper limit of the above relationship, the thickness of the third lens L3 is too thin, which causes the deflection angle of the edge light to be too small, which is not conducive to correcting the aberration of the optical lens 100, thereby not conducive to improving the imaging quality of the optical lens 100. When the optical lens 100 is lower than the lower limit of the above relationship, the focal length of the third lens L3 is too small, which causes the optical lens 100 to provide too large positive refractive power, resulting in too large deflection angle of the light in the optical lens 100.

[0104] In some embodiments, the optical lens 100 satisfies a relationship of |F4 / CT4| > 1, where F4 is the focal length of the fourth lens L4, and CT4 is the thickness of the fourth lens L4 on the optical axis. The fourth lens L4 can be reasonably configured, and the deflection angle of the light entering the fourth lens L4 can be effectively controlled, thereby reducing the sensitivity of the optical lens 100 and more conducive to improving the imaging quality.

[0105] In some embodiments, the optical lens 100 satisfies a relationship of -15 < F5 / CT5 < -2, 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. The fifth lens L5 has a refractive power of F5 / CT5, which can balance the high-order aberration in cooperation with the fourth lens L4, thereby improving the quality of the optical lens 100.

[0106] In some embodiments, the optical lens 100 satisfies a relationship of 1.4 < F6 / CT6 < 1.9, where F6 is the focal length of the sixth lens L6, and CT6 is the thickness of the sixth lens L6 on the optical axis. The sixth lens L6 is convenient for correcting the spherical aberration and the chromatic aberration, thereby improving the imaging quality of the optical lens 100.

[0107] In some embodiments, the optical lens 100 satisfies a relationship of -10 < F1 / F < -5, and / or, -3 < F2 / F < -2, and / or, 3 < F3 / F < 4, and / or, |F4 / F| > 1, and / or, -10 < F5 / F < -1, and / or, 2 < F6 / F < 3. By reasonably configuring the ratio of the focal length of each lens to the focal length of the optical lens 100, the refractive power of each lens can be evenly and reasonably distributed, which is more conducive to aberration correction of the optical lens 100, the image quality is good, and the imaging quality of the optical lens 100 is improved.

[0108] The optical lens 100 of the present embodiment will be described in detail below in combination with specific parameters.

[0109] Embodiment 1

[0110] The structural schematic diagram of the optical lens 100 disclosed in Embodiment 1 of this application is shown below. Figure 1 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter 110, and a protective glass 120, arranged sequentially along the optical axis from the object side to the image side. The first lens L1 has negative 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, and the sixth lens L6 has positive refractive power.

[0111] Furthermore, the object-side surface 11 of the first lens L1 is convex near the optical axis, and the image-side surface 12 of the first lens L1 is concave near the optical axis; the object-side surface 21 of the second lens L2 is convex near the optical axis, and the image-side surface 22 of the second lens L2 is concave near the optical axis; the object-side surface 31 and the image-side surface 32 of the third lens L3 are both convex near the optical axis; the object-side surface 41 of the fourth lens L4 is convex near the optical axis, and the image-side surface 42 of the fourth lens L4 is convex near the optical axis; the object-side surface 51 and the image-side surface 52 of the fifth lens L5 are both concave near the optical axis; and the object-side surface 61 and the image-side surface 62 of the sixth lens L6 are both convex near the optical axis.

[0112] Specifically, taking the focal length F = 1.0937 mm, the aperture number FNO = 2.02, and the maximum field of view HFOV = 101.08 degrees of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 1 below. The elements along the optical axis of the optical lens 100 from the object side to the image side are arranged sequentially according to the order of the elements in Table 1 from top to bottom. In the same lens, the surface with the smaller surface number is the object side of the lens, and the surface with the larger surface number is the image side of the lens. For example, surface numbers 1 and 2 correspond to the object side 11 and image side 12 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 aperture 102 in the "Thickness" parameter column represents the distance on the optical axis from aperture 102 to the vertex of the next surface (the vertex refers to the intersection of the surface and 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 this value is negative, it indicates that aperture 102 is set on the image side of the vertex of the next surface. If the thickness of aperture 102 is positive, aperture 102 is on the object side of the vertex of the next surface. It can be understood that the units of Y radius, thickness, and focal length in Table 1 are all mm. Moreover, the refractive index, Abbe number, etc. in Table 1 are all obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 546.0740 nm.

[0113] Table 1

[0114]

[0115] In embodiment 1, the object side surface and the image side surface of the second lens L2, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical surfaces, and the surface type x of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0116]

[0117] wherein x is the sag of the aspherical surface at a position with a height of h along the optical axis from the vertex of the aspherical surface; c is the curvature of the aspherical surface at the optical axis, c = 1 / Y (i.e., the paraxial curvature c is the inverse of the radius of curvature Y in Table 1 above); K is the conic constant; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16 of the aspherical surfaces of the second lens L2, the fourth lens L4, the fifth lens L5 and the sixth lens L6.

[0118] Table 2

[0119]

[0120]

[0121] Please refer to Figure 2 (A) in Figure 2 (A) in Fig. 11 is the spherical aberration diagram of the optical lens 100 in embodiment 1 at wavelengths of 660 nm, 587 nm, 546.0740 nm, 470 nm and 435 nm. The abscissa along the X-axis represents the focal shift, in mm, and the ordinate along the Y-axis represents the normalized field of view. It can be seen from Figure 2 (A) in Fig. 11 that the spherical aberration values of the optical lens 100 in embodiment 1 are better, indicating that the imaging quality of the optical lens 100 in the embodiment is better.

[0122] Please refer to Figure 2 (B) in Figure 2 (B) in Fig. 12 is the ray fan diagram of the optical lens 100 in embodiment 1 at a wavelength of 546.0740 nm. The abscissa along the X-axis represents the focal shift, in mm, and the ordinate along the Y-axis represents the field of view angle, in deg. T in the fan diagram represents the curvature of the imaging surface 101 in the meridional direction, and S represents the curvature of the imaging surface 101 in the sagittal direction. It can be seen from Figure 2As can be seen from (B) in the figure, at this wavelength, the field curvature of the optical lens 100 is small, and the field curvature and astigmatism of each field of view are well corrected. The center and edge of the field of view have clear imaging, that is, the astigmatism of the optical lens 100 is well compensated.

[0123] Please see Figure 2 (C) in the middle, Figure 2 (C) in the figure represents the distortion diagram of the optical lens 100 in Example 1 at a wavelength of 546.0740 nm. The horizontal axis along the X-axis represents the distortion, and the vertical axis along the Y-axis represents the field of view, in degrees (deg). Figure 2 As can be seen from (C), at this wavelength, the image distortion caused by the main beam is small, and the distortion of the optical lens 100 is well corrected.

[0124] Example 2

[0125] The structural schematic diagram of the optical lens 100 disclosed in Embodiment 2 of this application is shown below. Figure 3 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a filter 110 arranged sequentially along the optical axis from the object side to the image side. The first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has negative refractive power, the fifth lens L5 has negative refractive power, and the sixth lens L6 has positive refractive power.

[0126] Furthermore, the object-side surface 11 of the first lens L1 is convex near the optical axis, and the image-side surface 12 of the first lens L1 is concave near the optical axis; the object-side surface 21 of the second lens L2 is convex near the optical axis, and the image-side surface 22 of the second lens L2 is concave near the optical axis; the object-side surface 31 and the image-side surface 32 of the third lens L3 are both convex near the optical axis; the object-side surface 41 of the fourth lens L4 is concave near the optical axis, and the image-side surface 42 of the fourth lens L4 is convex near the optical axis; the object-side surface 51 and the image-side surface 52 of the fifth lens L5 are both concave near the optical axis; and the object-side surface 61 and the image-side surface 62 of the sixth lens L6 are both convex near the optical axis.

[0127] Specifically, taking the focal length F = 1.1484 mm, the aperture number FNO = 2.046, and the maximum field of view HFOV = 101 degrees of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 3 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 3 were obtained at a reference wavelength of 587.5618 nm, and the focal length was obtained at a reference wavelength of 546.0740 nm.

[0128] Table 3

[0129]

[0130]

[0131] In embodiment 2, the high order term coefficients of each aspherical surface of the second lens L2, the fourth lens L4, the fifth lens L5 and the sixth lens L6 used in embodiment 2 are given in Table 4, wherein each aspherical surface type can be defined by the formula given in embodiment 1.

[0132] Table 4

[0133]

[0134] Please refer to Figure 4 , the curves in (A) the spherical aberration diagram, (B) the ray fan diagram and (C) the distortion diagram of Figure 4 , it can be seen that the spherical aberration, the fan and the distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, the wavelengths corresponding to the curves in (A) of Figure 4 , (B) of Figure 4 and (C) of Figure 4 , please refer to the descriptions of the wavelengths corresponding to the curves in (A) of Figure 2 , (B) of Figure 2 and (C) of Figure 2 of embodiment 1, which will not be repeated here.

[0135] Embodiment 3

[0136] The structural schematic diagram of the optical lens 100 disclosed by embodiment 3 of the present application is shown in Figure 5 , taking the focal length F of the optical lens 100 = 1.1549mm, the F number FNO of the optical lens 100 = 2.02, the half of the maximum field angle of the optical lens 100 HFOV = 100.8954deg as an example, other parameters of the optical lens 100 are given in the following Table 5. And the definition of each parameter can be obtained from the foregoing description of the embodiments, which will not be repeated here. And the refractive index, Abbe number and the like in Table 5 are obtained at the reference wavelength of 587.5618nm, and the focal length is obtained at the reference wavelength of 546.0740nm. In addition, the refractive power of each lens and the correspondence between the surface serial number and the object side surface and the image side surface of each lens, please refer to the foregoing description of embodiment 1, which will not be repeated here.

[0137] Table 5

[0138]

[0139] In Embodiment 3, Table 6 shows the high-order term coefficients of the aspherical surface of each of the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 used in Embodiment 3, wherein each aspherical surface type can be defined by the formula given in Embodiment 1.

[0140] Table 6

[0141]

[0142] Referring to Figure 6 , it can be seen from (A) the spherical aberration diagram, (B) the ray fan diagram, and (C) the distortion diagram in Figure 6 that the spherical aberration, the fan, and the distortion of the optical lens 100 are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, the wavelengths corresponding to each curve in (A), Figure 6 (B), and (C) Figure 6 are as described in Embodiment 1 regarding (A), Figure 6 (B), and (C) Figure 2 , which will not be described here again. Figure 2 Figure 2

[0143] Embodiment 4

[0144] The structural schematic diagram of the optical lens 100 disclosed by Embodiment 4 of the present application is shown in Figure 7 , taking the focal length F of the optical lens 100 = 1.1522mm, the F number FNO of the optical lens 100 = 2.02, and half of the maximum field angle HFOV of the optical lens 100 = 101 deg as an example, other parameters of the optical lens 100 are given in Table 7 below. And the definition of each parameter can be obtained from the foregoing description of the embodiments, which will not be described here again. And the refractive index, Abbe number, etc. in Table 7 are obtained at the reference wavelength of 587.5618nm, and the focal length is obtained at the reference wavelength of 546.0740nm. In addition, regarding the refractive power of each lens and the correspondence between the surface number and the object side surface and the image side surface of each lens, please refer to the description of the foregoing Embodiment 1, which will not be described here again.

[0145] Table 7

[0146]

[0147] In Embodiment 4, Table 8 shows the high-order term coefficients of the aspherical surface of each of the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 used in Embodiment 4, wherein each aspherical surface type can be defined by the formula given in Embodiment 1.

[0148] Table 8

[0149] ​​

[0150]

[0151] Please see Figure 8 ,Depend on Figure 8 As can be seen from (A) the spherical aberration diagram, (B) the ray astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 8 (A) Figure 8 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be found in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0152] Example 5

[0153] The structural schematic diagram of the optical lens 100 disclosed in Embodiment 5 of this application is shown below. Figure 9 As shown, taking the focal length F = 1.2362 mm, the aperture number FNO = 2.03, and the half of the maximum field of view HFOV = 101 degrees of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 9 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 9 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 546.0740 nm. In addition, regarding the correspondence between the surface numbers and the object-side and image-side surfaces of each lens, please refer to the description in the aforementioned Embodiment 2, which will not be repeated here.

[0154] Table 9

[0155]

[0156] In Example 5, Table 10 gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for the aspherical surfaces of the second lens L2, fourth lens L4, fifth lens L5, and sixth lens L6 in Example 5. The surface shape of each aspherical surface can be defined by the formula given in Example 1.

[0157] Table 10

[0158]

[0159]

[0160] Please seeFigure 10 , Figure 10 (A) in the figure is a spherical aberration diagram of the optical lens 100 in Example 5 at wavelengths of 656nm, 587nm, 546.0740nm, 486nm, and 436nm. Figure 10 In Figure (B) and (C), the light astigmatism and distortion diagrams of the optical lens 100 in Example 5 at a wavelength of 546.0740 nm are shown, respectively. Figure 10 As can be seen from (A) spherical aberration diagram, (B) ray astigmatism diagram and (C) distortion diagram, the spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, thus the optical lens 100 of this embodiment has good imaging quality.

[0161] Example 6

[0162] The structural schematic diagram of the optical lens 100 disclosed in Embodiment 6 of this application is shown below. Figure 11 As shown, taking the focal length F = 1.0512 mm, the aperture number FNO = 1.9, and the maximum field of view HFOV = 105.1 degrees of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 11 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 11 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 546.0740 nm. In addition, regarding the refractive power of each lens, please refer to the description in Embodiment 2 above; regarding the correspondence between the surface numbers and the object-side and image-side surfaces of each lens, please refer to the description in Embodiment 1 above, and will not be repeated here.

[0163] Table 11

[0164]

[0165]

[0166] In Example 6, Table 12 provides the higher-order coefficients that can be used for each aspherical mirror surface of the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 in Example 6. The shape of each aspherical surface can be defined by the formula given in Example 1.

[0167] Table 12

[0168]

[0169] Please see Figure 12 ,Depend on Figure 12As can be seen from (A) the spherical aberration diagram, (B) the ray astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 12 (A) Figure 12 (B) and Figure 12 The wavelengths corresponding to the curves in (C) can be found in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0170] Example 7

[0171] The structural schematic diagram of the optical lens 100 disclosed in Embodiment 7 of this application is shown below. Figure 13 As shown, taking the focal length F = 1.234 mm, the aperture number FNO = 2.1, and the half of the maximum field of view HFOV = 94.51 degrees of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 13 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 13 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 546.0740 nm. In addition, regarding the refractive power of each lens and the correspondence between the surface number and the object-side and image-side surfaces of each lens, please refer to the description in the aforementioned Embodiment 2, which will not be repeated here.

[0172] Table 13

[0173]

[0174]

[0175] In Example 7, Table 14 provides the higher-order coefficients that can be used for each aspherical mirror surface of the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 in Example 7. The shape of each aspherical surface can be defined by the formula given in Example 1.

[0176] Table 14

[0177]

[0178] Please see Figure 14 ,Depend on Figure 14 As can be seen from (A) the spherical aberration diagram, (B) the ray astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 14corresponding to each curve in (A) of FIG. 6, Figure 14 corresponding to each curve in (B) of FIG. 6, Figure 14 corresponding to each curve in (C) of FIG. 6 can refer to the descriptions about Figure 2 corresponding to each curve in (A) of FIG. 6, Figure 2 corresponding to each curve in (B) of FIG. 6, Figure 2 corresponding to each curve in (C) of FIG. 6, which will not be repeated here.

[0179] Please refer to Table 15, which is a summary of the ratio of each relationship in Embodiments 1-7 of the present application.

[0180] Table 15

[0181]

[0182] Please refer to Figure 15 The present application also discloses a camera module 200, which comprises an image sensor 201 and the optical lens 100 as described in any one of Embodiments 1-7 above, and 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 at the imaging surface 101 of the optical lens 100, and the light rays of an object incident on the photosensitive surface through the lens can be converted into an electrical signal of an 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 a terminal device 300, or can be a separate lens. It can be understood that the camera module 200 with the optical lens 100 has all the technical effects of the optical lens 100, i.e., the camera module 200 can meet the design requirements of having high imaging quality, a large field of view and small size at the same time. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they will not be repeated here.

[0183] The present application also discloses a terminal device 300, which comprises a housing 301 and the camera module 200 described above, and the camera module 200 is arranged on the housing 301. The terminal device 300 can include but is not limited to a mobile phone, a tablet computer, a notebook computer, a smart watch, a vehicle-mounted device, a drone, a monitor, etc. Please refer to Figure 16 For example, when the terminal device 300 is a mobile phone, the camera module 200 can be arranged on the housing 301.

[0184] Please refer to Figure 17The terminal device 300 can also be a vehicle, and at this time the shell 301 can be a vehicle body, and the camera module 200 can be arranged on the vehicle body, for example, can be arranged inside or outside the vehicle body.

[0185] It can be understood that the terminal device 300 with the camera module 200 has all the technical effects of the optical lens 100. That is, the terminal device 300 can meet the design requirements of having high imaging quality, a large field of view, and small size. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they will not be described here.

[0186] The optical lens, the camera module, and the terminal device disclosed in the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above embodiment descriptions are only used to help understand the optical lens, the camera module, and the terminal device of the present application and the core ideas thereof. Meanwhile, for those skilled in the art, according to the ideas of the present application, the specific implementation manners and application ranges will be changed, and the content of the specification should not be understood as a limitation of 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 negative 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 negative refractive power, the object side surface of the second lens is convex near the optical axis, and the image side surface of the second lens is concave near the optical axis; 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, and the image side surface of the fourth lens is convex near the optical axis; The fifth lens has negative refractive power, and both the object side surface and the image side surface of the fifth lens are concave near the optical axis; The sixth lens has positive refractive power, and both the object side surface and the image side surface of the sixth lens are convex near the optical axis; The optical lens satisfies the following relational expressions: 90deg < HFOV < 110deg, 6 < TTL / IMGH < 7, 2 < IMGH / F < 2.4, -4 < F2 / CT2 < -2.5, and 1.4 < F6 / CT6 < 1.9; Where, HFOV is half of the maximum field angle of the optical lens, 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 angle of the optical lens, F is the focal length of the optical lens, F2 is the focal length of the second lens, CT2 is the thickness of the second lens on the optical axis, F6 is the focal length of the sixth lens, and CT6 is the thickness of the sixth lens on the optical axis.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 13.5 < TTL / F < 15, and / or, 1.9 ≤ FNO ≤ 2.1, and / or, 75deg / mm < HFOV / F < 100deg / mm; Where, FNO is the f-number of the optical lens.

3. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: -4 < (F1 + F2) / F3 < -2, and / or, |F4 / F5| < 40, and / or, 0 < F123 / F456 < 25; [[ID= 4. The optical lens according to claim 1, characterized in that, ​ ​ Where, SD1 is half of the maximum effective aperture of the object side of the first lens, SD2 is half of the maximum effective aperture of the image side of the first lens, CT12 is the distance on the optical axis from the image side of the first lens to the object side of the second lens, SD8 is half of the maximum effective aperture of the image side of the fourth lens, and SAG8 is the distance on the optical axis 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.

5. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 1.9 < CT3 / CT4 < 3.2, and / or, 2.3 < CT6 / ET6 < 3.2, and / or, 1.7 < CTAL / (CT3 + CT4) < 2.2; Where, CT3 is the thickness of the third lens on the optical axis, ET6 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side of the sixth lens to the maximum effective semi-aperture of the image side of the sixth lens, and CTAL is the sum of the thicknesses of all lenses from the first lens to the sixth lens on the optical axis.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 2.4 < CT12 / CT2 < 3, and / or, 3.5 < SAG4 / SAG3 < 9, and / or, 4 < R3 / R4 < 17; Where, CT12 is the distance on the optical axis from the image side of the first lens to the object side of the second lens, SAG3 is the distance on the optical axis from the intersection of the object side of the second lens and the optical axis to the maximum effective aperture of the object side of the second lens, SAG4 is the distance on the optical axis 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, R3 is the curvature radius of the object side of the second lens at the optical axis, and R4 is the curvature radius of the image side of the second lens at the optical axis.

7. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 1.1 < CT6 / CT4 < 1.4; Where, CT4 is the thickness 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: 5 < CT3 / (|SAG5| + |SAG6|) < 12, and / or, -3 < CT6 / SAG12 < -1.5; Where, CT3 is the thickness of the third lens on the optical axis, SAG5 is the distance on the optical axis from the intersection of the object side of the third lens and the optical axis to the maximum effective aperture of the object side of the third lens, SAG6 is the distance on the optical axis from the intersection of the image side of the third lens and the optical axis to the maximum effective aperture of the image side of the third lens, and SAG12 is the distance on the optical axis from the intersection of the image side of the sixth lens and the optical axis to the maximum effective aperture of the image side of the sixth 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, It includes a housing and an imaging module according to claim 9, and the imaging module is disposed in the housing.

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