CN116500760B

CN116500760B - Optical lens, camera module and electronic equipment

Info

Publication number: CN116500760B
Application number: CN202310766744.3A
Authority: CN
Inventors: 刘彬彬; 邓嘉伟; 张成林
Original assignee: Jiangxi Oufei Optics Co ltd
Current assignee: Jiangxi Oufei Optics Co ltd
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2023-09-19
Anticipated expiration: 2043-06-27
Also published as: CN116500760A

Abstract

The application discloses an optical lens, an image pickup module and electronic equipment, wherein the optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged; the first lens group is fixed relative to the imaging surface of the optical lens, and the second lens group moves between the first lens group and the imaging surface of the optical lens along the optical axis direction; the optical lens satisfies the relation: f123/fmax 0.4-0.6, F456/fmax 0.45-0.3, and CT3/CT2 4. The optical lens, the camera module and the electronic equipment disclosed by the application can reduce the influence on focusing speed on the basis of considering miniaturization design.

Description

Optical lens, camera module and electronic equipment

Technical Field

The present application relates to the field of optical imaging technologies, and in particular, to an optical lens, a camera module, and an electronic device.

Background

Along with the increasing miniaturization requirements of intelligent terminals such as mobile phones and tablet computers, new challenges are brought to the design requirements of optical lenses arranged in the mobile phones and the tablet computers. In the related art, the focusing mode of the optical lens is generally realized by moving the whole lens by the focusing motor to enable the imaging surface of the lens to coincide with the photosensitive surface of the photosensitive chip, so that a larger space (mechanical back focus) is required to be reserved between the lens and the photosensitive chip, which is not only unfavorable for the miniaturization design of the lens module, but also has higher requirement on the strength of the focusing motor by moving the whole lens, so that the size of the focusing motor is larger, and the focusing speed is greatly reduced.

Disclosure of Invention

The embodiment of the invention discloses an optical lens, an imaging module and electronic equipment, which can reduce the influence on focusing speed on the basis of considering miniaturization design.

In order to achieve the above object, the present invention discloses an optical lens, which has six lens elements with refractive power, and includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, which are disposed in order from an object side to an image side along an optical axis;

the first lens, the second lens and the third lens are a first lens group, the fourth lens, the fifth lens and the sixth lens are a second lens group, the first lens group is fixed relative to an imaging surface of the optical lens, and the second lens group moves between the first lens group and the imaging surface of the optical lens along the optical axis direction; the first lens element with positive refractive power, the second lens element with negative refractive power, the third lens element with positive refractive power, the fourth lens element with negative refractive power, the fifth lens element with negative refractive power, and the sixth lens element with positive refractive power;

the optical lens satisfies the following relation:

F123/fmax is more than 0.4 and less than 0.6, -F456/fmax is more than 0.45 and less than-0.3; and CT2 is more than 2 and CT3/CT2 is more than 4;

wherein F123 is a combined focal length of the first lens, the second lens and the third lens, F456 is a combined focal length of the fourth lens, the fifth lens and the sixth lens, fmax is a maximum focal length of the optical lens, CT3 is a thickness of the third lens on the optical axis, and CT2 is a thickness of the second lens on the optical axis.

In a second aspect, the present invention discloses an image capturing module, where the image capturing module includes an image sensor and the optical lens according to the first aspect, and the image sensor is disposed on an image side of the optical lens. The camera module with the optical lens can reduce the influence on focusing speed on the basis of considering miniaturization design.

In a third aspect, the present invention discloses an electronic device, which includes a housing and an image capturing module set according to the second aspect, where the image capturing module set is disposed in the housing. The electronic equipment with the camera module can reduce the influence on focusing speed on the basis of considering miniaturization design.

Compared with the prior art, the invention has the beneficial effects that:

In order to reduce the influence on the focusing speed on the basis of the miniaturization design, the six lenses are divided into the first lens group and the second lens group, the first lens group is fixed relative to the imaging surface of the optical lens, and the second lens group can move along the optical axis direction between the first lens group and the imaging surface of the optical lens, so that the optical lens can have a continuous inner focusing function, and the total length of the optical lens is not changed in the moving process of the second lens group, namely, the optical lens has a fixed total length. The design requirement of miniaturization of the optical lens can be further met; meanwhile, the burden of the optical lens on the motor can be further reduced by only using the mode of moving the second lens group, and the effect of quick internal focusing of the optical lens can be achieved under the condition of using a lower-power motor; in addition, six lenses with refractive power are used, so that the refractive pressure of light can be uniformly dispersed to each lens, the task amount of bending the light of a single lens is reduced, and the lens is prevented from being excessively bent to increase tolerance sensitivity. When the number of lenses of the second lens group is less than two, the second lens group has too small number of lenses, has poor refractive power, is not easy to correct aberration generated by the first lens to the sixth lens, and causes poor imaging quality; when the number of lenses of the fixed lens group is less than two of the above, the number of lenses of the second lens group is excessive, resulting in an excessive total mass of the second lens group, a higher motor requirement is required, a higher-specification motor is required to be customized, and the second lens group is also more difficult to be driven by the motor, resulting in a slow focusing speed. Therefore, by adopting the scheme of the application, the influence on the focusing speed can be reduced.

In addition, when the optical lens satisfies the relation 0.4 < F123/fmax < 0.6, -0.45 < F456/fmax < -0.3, on one hand, the small-view-field and telephoto effects can be realized, and on the other hand, the total length of the optical lens can be kept inconvenient under the condition of correcting different object-distance image quality performances by moving the second lens group, so that internal focusing imaging can be realized, the movement stroke of the second lens group can be reduced, the movement carrying quantity of a motor can be effectively ensured, the influence on the focusing speed can be reduced, and meanwhile, the refractive power of the first lens group and the second lens group can be reasonably configured, larger spherical aberration generated by the first lens group can be avoided, the overall resolving power of the optical lens can be favorably improved, the distance dimension compression between the first lens group and the second lens group can be favorably realized, and the internal focusing mode of the small stroke can be realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1A is a schematic structural diagram of an optical lens in a far focus state according to a first embodiment of the present application;

fig. 1B is a longitudinal spherical aberration diagram (mm), an astigmatic curve diagram (mm) and a distortion curve diagram (%) of an optical lens in a telephoto state according to the first embodiment of the present application;

fig. 2A is a schematic structural diagram of an optical lens in a near-focus state according to a first embodiment of the present application;

fig. 2B is a longitudinal spherical aberration diagram (mm), an astigmatic curve diagram (mm) and a distortion curve diagram (%) of an optical lens in a near-focus state according to the first embodiment of the present application;

fig. 3A is a schematic structural diagram of an optical lens in a far focus state according to a second embodiment of the present application;

fig. 3B is a longitudinal spherical aberration diagram (mm), an astigmatic curve diagram (mm) and a distortion curve diagram (%) of an optical lens in a telephoto state according to a second embodiment of the present application;

fig. 4A is a schematic structural diagram of an optical lens in a near-focus state according to a second embodiment of the present application;

fig. 4B is a longitudinal spherical aberration diagram (mm), an astigmatic curve diagram (mm) and a distortion curve diagram (%) of an optical lens in a near-focus state according to a second embodiment of the present application;

fig. 5A is a schematic structural view of an optical lens in a far focus state according to a third embodiment of the present application;

Fig. 5B is a longitudinal spherical aberration diagram (mm), an astigmatic curve diagram (mm) and a distortion curve diagram (%) of an optical lens in a telephoto state according to a third embodiment of the present application;

fig. 6A is a schematic structural diagram of an optical lens in a near-focus state according to a third embodiment of the present application;

fig. 6B is a longitudinal spherical aberration diagram (mm), an astigmatic curve diagram (mm) and a distortion curve diagram (%) of an optical lens in a near-focus state according to a third embodiment of the present application;

fig. 7A is a schematic structural view of an optical lens disclosed in a fourth embodiment of the present application in a far focus state;

fig. 7B is a longitudinal spherical aberration diagram (mm), an astigmatic curve diagram (mm) and a distortion curve diagram (%) of an optical lens in a telephoto state according to a fourth embodiment of the present application;

fig. 8A is a schematic structural view of an optical lens in a near-focus state according to a fourth embodiment of the present application;

fig. 8B is a longitudinal spherical aberration diagram (mm), an astigmatic curve diagram (mm) and a distortion curve diagram (%) of an optical lens in a near-focus state according to a fourth embodiment of the present application;

fig. 9A is a schematic structural view of an optical lens disclosed in a fifth embodiment of the present application in a far focus state;

fig. 9B is a longitudinal spherical aberration diagram (mm), an astigmatic curve diagram (mm), and a distortion curve diagram (%) of an optical lens in a telephoto state according to a fifth embodiment of the present application;

Fig. 10A is a schematic structural view of an optical lens in a near-focus state according to a fifth embodiment of the present application;

fig. 10B is a longitudinal spherical aberration diagram (mm), an astigmatic curve diagram (mm), and a distortion curve diagram (%) of an optical lens in a near-focus state according to a fifth embodiment of the present application;

FIG. 11 is a schematic view of a camera module according to the present disclosure;

fig. 12 is a schematic structural view of an electronic device disclosed in the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The technical scheme of the application will be further described with reference to the examples and the accompanying drawings.

Referring to fig. 1A, according to a first aspect of the present application, an optical lens 100 having six lens elements with refractive power is disclosed, wherein the optical lens 100 includes a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and a sixth lens element L6, which are disposed in order from an object side to an image side along an optical axis. The first lens L1, the second lens L2, and the third lens L3 form a first lens group G1, and the fourth lens L4, the fifth lens L5, and the sixth lens L6 form a second lens group G2. The first lens group G1 is fixed with respect to the imaging surface 101 of the optical lens 100, and the second lens group G2 moves in the optical axis direction between the first lens group G1 and the imaging surface 101 of the optical lens 100, so that the optical lens 100 can have a continuous inner focusing function, and the total length of the optical lens 100 does not change during the movement of the second lens group G2, i.e., the optical lens 100 has a fixed optical total length. The design requirement of miniaturization of the optical lens 100 can be further met; meanwhile, by using only the way in which the second lens group G2 moves, the burden of the optical lens 100 on the motor can be further reduced, and the effect of rapid inner focusing of the optical lens 100 can be achieved in the case of using a lower power motor.

The first lens element L1 with positive refractive power, the second lens element L2 with negative refractive power, the third lens element L3 with positive refractive power, the fourth lens element L4 with negative refractive power, the fifth lens element L5 with negative refractive power, and the sixth lens element L6 with positive refractive power. During 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 finally is imaged on the imaging surface 101 of the optical lens 100.

Further, the object side surface 11 and the image side surface 12 of the first lens element L1 are convex at a paraxial region; the object-side surface 21 of the second lens element L2 is convex at a paraxial region, and the image-side surface 22 of the second lens element L2 is concave at a paraxial region; the object side surface 31 and the image side surface 32 of the third lens element L3 are convex at a paraxial region; the object-side surface 41 of the fourth lens element L4 is concave at a paraxial region, and the image-side surface 42 of the fourth lens element L4 is concave or convex at a paraxial region; the object-side surface 51 of the fifth lens element L5 is convex or concave at a paraxial region, and the image-side surface 52 of the fifth lens element L5 is concave at a paraxial region; the object-side surface 61 of the sixth lens element L6 is convex at a paraxial region, and the image-side surface 62 of the sixth lens element L6 is concave at a paraxial region.

The design of the refractive power and the surface shape of the six lenses, particularly the design that the first lens has positive refractive power and the object side surface and the image side surface of the first lens are convex at the paraxial region can be beneficial to the incidence and collection of light rays in the visual field range; the second lens element with negative refractive power has a convex object-side surface and a concave image-side surface at a paraxial region, which can be used for correcting aberration generated by the first lens element; the third lens element with positive refractive power has a convex object-side surface and a convex image-side surface at a paraxial region, so as to reduce the incidence angle of light entering the optical lens element from the front lens element; the fourth lens element with negative refractive power has a concave object-side surface at a paraxial region thereof, which is beneficial to correcting spherical aberration, coma aberration and distortion generated by the first lens element; the fifth lens element with negative refractive power has a concave image-side surface at a paraxial region thereof, which is beneficial to correcting distortion and astigmatism; the sixth lens element with positive refractive power has convex and concave object-side surfaces at paraxial regions, so as to effectively correct aberration and control light emergent angle. In addition, the six lenses of the optical lens have a design that a plurality of lenses adopt concave-convex lenses, so that the total length of the optical lens can be effectively reduced, and the miniaturization design of the optical lens is facilitated. It is understood that the present application provides a preferred solution only with respect to the refractive power and the surface type design of each lens of the optical lens assembly, and in other embodiments, the refractive power and the surface type design of each lens of the optical lens assembly may also be other solutions, and any other combination is possible for reasons that are not all listed herein.

In some embodiments, the optical lens 100 can be applied to electronic devices such as smart phones and smart tablets, so that the materials of 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 can be plastic, so that the optical lens 100 can be light and can be easily processed into complex surfaces. It can be appreciated that in other embodiments, when the optical lens 100 is applied to an electronic device such as a vehicle device or a vehicle recorder or applied to an automobile and used as a camera on a vehicle body, 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 may be glass lenses, so that the optical lens 100 has a good optical effect and meanwhile, the temperature sensitivity of the optical lens 100 may be reduced.

In some embodiments, the optical lens 100 further includes a diaphragm 102, where the diaphragm 102 may be an aperture diaphragm and/or a field diaphragm, and may be disposed between the object plane and the object side 11 of the first lens L1. It is to be understood that in other embodiments, the diaphragm 102 may be disposed between two other lenses, for example, the diaphragm 102 may be disposed between the fourth lens L4 and the fifth lens L5, and the arrangement may be specifically adjusted according to the actual situation, which is not limited in this embodiment.

In some embodiments, the optical lens 100 further includes an optical filter 70, the optical filter 70 is disposed between the second lens group G2 and the imaging surface 101 of the optical lens 100, and the optical filter 70 can move between the sixth lens group L6 and the imaging surface 101 of the optical lens 100 along the optical axis direction under the driving of the second lens group G2, so that the optical filter 70 can move along with the second lens group G2, and when the optical lens 100 is applied to an image capturing module, compared with the scheme of disposing the optical filter 70 on an image sensor in the related art, the packaging of the image sensor can be effectively simplified, and meanwhile, the light and thin design of the image sensor is also facilitated. Optionally, the filter 70 may be an infrared cut-off filter, and the infrared cut-off filter is selected to filter infrared light, so as to improve imaging quality and make imaging more in line with the visual experience of human eyes. It is to be understood that the optical filter 70 may be made of an optical glass coating, or may be made of colored glass, or may be made of another material, and may be selected according to practical needs, which is not specifically limited in this embodiment.

As can be seen from the foregoing, the optical lens 100 according to the present application can realize the inner focusing mode, that is, the total length of the optical lens 100 is unchanged during the movement of the second lens group G2, and the optical lens 100 satisfies the relationship: TTLZ 1/ttlz2=1. Wherein TTLZ1 is the distance between the object side surface 11 of the first lens element L1 and the imaging surface 101 of the optical lens assembly 100 on the optical axis (i.e., the total length of the optical lens assembly 100 when the second lens element G2 is in the telephoto position) when the second lens element G2 is in the telephoto position, and TTLZ2 is the distance between the object side surface 11 of the first lens element L1 and the imaging surface 101 of the optical lens assembly 100 on the optical axis (i.e., the total length of the optical lens assembly 100 when the second lens element G2 is in the near-focus position) when the second lens element G2 is in the near-focus position. Thus, by the movement of the second lens group G2, the total length of the optical lens 100 is kept unchanged under the condition of correcting the image quality performance of different object distances, thereby realizing the inner focusing function, that is, the function of zooming is realized by the movement of the inner lens group under the condition of keeping the height of the optical lens 100 unchanged.

In some embodiments, the optical lens 100 satisfies the following relationship: 30deg < FOV < 36deg; wherein FOV is the maximum field angle of the optical lens 100. When the optical lens 100 satisfies the relation 30deg < FOV < 36deg, the optical lens 100 can achieve a small field of view, telephoto efficacy.

In some embodiments, the optical lens 100 also satisfies the following relationship 0.3mm < B2-B1 < 0.5mm; wherein B1 is a distance between the first lens group G1 and the second lens group G2 on the optical axis when the second lens group G2 is located at the near focal position, and B2 is a distance between the first lens group G1 and the second lens group G2 on the optical axis when the second lens group G2 is located at the far focal position. Through the movement of the second lens group G2, the total length of the optical lens 100 can be kept inconvenient under the condition of correcting the image quality performance of different object distances, so that the internal focusing imaging is realized, meanwhile, the movement amount of the second lens group G2 from far focus to near focus is controlled between 0.3mm and 0.5mm, the movement stroke of the second lens group G2 can be reduced, the movement momentum of a motor is effectively ensured, and the influence on focusing speed is reduced.

In some embodiments, the optical lens 100 satisfies the following relationship: DLmax/TTL is less than 0.74 and less than 0.85; for example, it may be 0.76 < DLmax/TTL < 0.8. Where DLmax is the maximum distance between the object side surface 11 of the first lens element L1 and the image side surface 62 of the sixth lens element L6 on the optical axis, and TTL is the distance between the object side surface 11 of the first lens element L1 and the imaging surface 101 of the optical lens 100 on the optical axis (i.e. the total length of the optical lens 100). When the optical lens 100 satisfies the relation 0.74 < DLmax/TTL < 0.85, the space of the lens part of the optical lens 100 can be reduced on the basis of realizing the miniaturization design of the optical lens 100, and enough space is reserved for focusing of the second lens group G2 under different working object distance conditions (namely far focus and near focus), so that the optical lens 100 can save cost and realize transverse arrangement under the condition of realizing the inner focusing function.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.9 < TTL/fmax < 1.05, for example, 0.95 < TTL/fmax < 1. Where fmax is the maximum focal length of the optical lens 100. Thus, the optical lens 100 can provide a lower lens height in the range of FOV < 36deg, further realize a miniaturized design and realize a better telephoto effect.

In some embodiments, the optical lens 100 satisfies the following relationship: 3 < |T23|+|T45|/|T34 max| < 3.5; wherein T23 is an air space on the optical axis between the second lens L2 and the third lens L3, T34max is a maximum air space on the optical axis between the third lens L3 and the fourth lens L4, and T45 is an air space on the optical axis between the fourth lens L4 and the fifth lens L5. The optical lens 100 satisfies the relation: when 3 < |T23|+|T45|/|T34 max| < 3.5, the incidence angle and the emergent angle of the peripheral light can be kept small, so that the direction change of the light after entering the optical lens 100 is slowed down, and the generation of astigmatism is reduced.

In some embodiments, the optical lens 100 satisfies the following relationship: ET1/CT1 is more than 0.25 and less than 0.4; where ET1 is the distance from the maximum effective half-caliber of the object side surface 11 of the first lens L1 to the maximum effective half-caliber of the image side surface 12 of the first lens L1 in the direction parallel to the optical axis (i.e., the edge thickness of the first lens L1), and CT1 is the thickness of the first lens L1 at the optical axis (i.e., the center thickness of the first lens L1). Through the ratio of the edge thickness and the center thickness of the first lens L1, incidence and collection of light rays in a visual field range can be facilitated, and meanwhile machining and forming of the first lens L1 are facilitated, so that the thickness design of the first lens L1 is reasonable, and the machining difficulty of the first lens L1 is reduced.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.3mm < SD62/FNO < 1.65mm, wherein SD62 is the maximum effective half-caliber of the image side surface 62 of the sixth lens L6 and FNO is the f-number of the optical lens 100. By controlling the ratio of the maximum effective half aperture of the image side surface 62 of the sixth lens element L6 to the f-number of the optical lens 100, the optical lens 100 can be made compact and small in size as a whole, and has a large aperture characteristic.

In some embodiments, the optical lens 100 satisfies the relationship: FNO is more than 1.7 and less than 2.1. In this way, the optical lens 100 can have the characteristic of a large aperture.

In some embodiments, the optical lens 100 satisfies the following relationship: (n1+n2)/2n1 >1. Where n1 is the refractive index of the first lens L1, and n2 is the refractive index of the second lens L2. When the optical lens 100 satisfies the relation (n1+n2)/2n1 >1, the refractive power distribution of the first lens element L1 and the second lens element L2 can be made appropriate, so that the chromatic aberration and spherical aberration of the optical lens 100 can be reduced to the maximum extent, and the imaging quality of the optical lens 100 can be improved.

In some embodiments, the optical lens 100 satisfies the following relationship: V2-V1 >30; where V1 is the abbe number of the first lens L1 and V2 is the abbe number of the second lens L2. When the optical lens 100 satisfies the relation |v2-v1| >30, chromatic aberration correction between the second lens L2 and the first lens L1 can be facilitated, thereby reducing chromatic aberration of the optical lens 100 and facilitating improvement of imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: f123/fmax is more than 0.4 and less than 0.6; wherein F123 is a combined focal length of the first lens L1, the second lens L2, and the third lens L3. When the optical lens 100 satisfies the relationship 0.4 < F123/fmax < 0.6, the refractive power of the first lens group G1 can be reasonably configured, so as to avoid the first lens group G1 from generating a larger spherical aberration, thereby improving the overall resolving power of the optical lens 100, and being beneficial to compressing the distance between the first lens group G1 and the second lens group G2 and realizing a small-stroke inner focusing mode.

In some embodiments, the optical lens 100 satisfies the following relationship: -0.5 < F456/fmax < -0.3; f456 is a combined focal length of the fourth lens L4, the fifth lens L5, and the sixth lens L6. When the optical lens 100 satisfies the relation-0.5 < F456/fmax < -0.3, the absolute value of the refractive power of the second lens group G2 is smaller, which is beneficial to compressing the motion stroke of the second lens group G2, thereby being beneficial to realizing continuous change from far focus to near focus by moving the second lens group G2.

It can be seen that, for the optical lens 100 of the present application, reference can be made to the black box theory, that is, as long as the first lens group G2 is fixed, the second lens group G2 is movable, and the combined refractive power of the first lens group G1 and the second lens group G2 can satisfy the above relation, and the refractive power design of each lens of the first lens group G1 and the second lens group G2 is not limited thereto.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.15 < |F123/F456| < 1.4, for example, 1.2 < |F123/F456| < 1.35; when the optical lens 100 satisfies the relation 1.15 < |f123/f456| < 1.4, the refractive powers of the first lens group G1 and the second lens group G2 can be reasonably configured, so that a larger spherical aberration generated by the first lens group G1 can be avoided, and the overall resolution of the optical lens 100 is improved; meanwhile, the distance between the first lens group G1 and the second lens group G2 at different object distances is facilitated to be compressed, and a small-stroke focusing mode is facilitated to be formed. In addition, the refractive power of the first lens group G1 is greater than the refractive power of the second lens group G2, so as to enhance the light receiving capability of the optical lens 100, and facilitate the compression of the movement stroke of the second lens group G2, thereby realizing the miniaturization design of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: -0.9 < f2/fmax < -0.75; wherein f2 is the focal length of the second lens L2. When the optical lens 100 satisfies the relation-0.9 < f2/fmax < -0.75, that is, the reasonable refractive power distribution of the second lens element L2 is helpful to reduce the integrated spherical aberration, chromatic aberration and distortion of the first lens group G1 to a reasonable position, reduce the design difficulty of the latter lens, and improve the overall resolution of the optical lens 100, and enhance the peripheral aberration correction of the optical lens 100. In addition, the size compression of the first lens group G1 is also facilitated, thereby contributing to the formation of the small-sized optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.6 < |SAG11|+|SAG12|/CT1 < 0.75, wherein SAG11 is a distance between the maximum effective aperture of the object-side surface 11 of the first lens L1 and an intersection point of the object-side surface 11 of the first lens L1 and the optical axis in the optical axis direction (i.e., a sagittal height of the object-side surface 11 of the first lens L1), SAG12 is a distance between the maximum effective aperture of the image-side surface 12 of the first lens L1 and an intersection point of the image-side surface 12 of the first lens L1 and the optical axis in the optical axis direction (i.e., a sagittal height of the image-side surface 12 of the first lens L1), and CT1 is a thickness of the first lens L1 on the optical axis (i.e., a central thickness of the first lens L1). By defining the relation 0.6 < |SAG11|+|SAG12|/CT1 < 0.75, that is, by defining the ratio of the sagittal height to the central thickness of the object side surface 11 and the image side surface of the first lens element L1, not only the incidence collection of light rays in the field of view can be facilitated, but also the refractive power and the thickness of the first lens element L1 in the direction perpendicular to the optical axis can be reasonably controlled, so that the first lens element L1 is prevented from being too thin or too thick, and the processing and shaping of the first lens element L1 are facilitated.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.2 < |SAG51|+|SAG52|/CT5 < 1.75, wherein SAG51 is a distance in the optical axis direction from a maximum effective aperture of an object side surface of the fifth lens L5 to an intersection point of the object side surface of the fifth lens L5 and the optical axis (i.e., a sagittal height of the object side surface of the fifth lens L5), SAG52 is a distance in the optical axis direction from a maximum effective aperture of an image side surface of the fifth lens L5 to an intersection point of the image side surface of the fifth lens L5 and the optical axis (i.e., a sagittal height of the image side surface of the fifth lens L5), and CT5 is a thickness of the fifth lens L5 in the optical axis (i.e., a central thickness of the fifth lens L5). By controlling the ratio of the sagittal height of the object side surface and the image side surface of the fifth lens element L5 to the central thickness of the fifth lens element L5, the distortion and curvature of field generated by the first lens element group G1 can be corrected while facilitating the incidence and collection of light rays, so that the refractive power configuration of the lens element near the imaging plane 101 is uniform. In addition, the refractive power and thickness of the fifth lens element L5 in the direction perpendicular to the optical axis can be effectively controlled, so as to avoid the fifth lens element L5 being too thin or too thick, thereby facilitating the processing and forming of the fifth lens element L5, and simultaneously being beneficial to reducing the incident angle of light on the imaging plane 101 and reducing the sensitivity of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.1 < SAG31/CT3 < 0.18, wherein SAG31 is the distance between the maximum effective caliber of the object side surface of the third lens L3 and the intersection point of the object side surface of the third lens L3 and the optical axis in the optical axis direction (i.e. the sagittal height of the object side surface of the third lens L3), and CT3 is the thickness of the third lens L3 on the optical axis (i.e. the central thickness of the third lens L3). By controlling the ratio of the sagittal height of the object side surface of the third lens element L3 to the central thickness of the third lens element L3, the refractive power and the thickness of the third lens element L3 in the direction perpendicular to the optical axis can be reasonably controlled, the third lens element L3 is prevented from being too thin or too thick, the processing and forming of the third lens element L3 are facilitated, the incident angle of light on the imaging plane 101 can be reduced, and the sensitivity of the optical lens 100 can be reduced.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.7 < SDS4/SDS5 < 0.8, wherein SDS4 is the larger value of the maximum effective aperture of the object side surface and the maximum effective aperture of the image side surface of the fourth lens L4, and SDS5 is the larger value of the maximum effective aperture of the object side surface and the maximum effective aperture of the image side surface of the fifth lens L5. When the optical lens 100 satisfies the relation 0.7 < SDS4/SDS5 < 0.8, the emergent angle of the incident light can be reduced to a certain extent, astigmatism and field curvature are inhibited, and the imaging quality of the optical lens 100 is improved.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.2 < SD32/SD41 < 1.5, wherein SD32 is the maximum effective half-caliber of the image side surface of the third lens L3, and SD41 is the maximum effective half-caliber of the object side surface of the fourth lens L4. When the optical lens 100 satisfies the relationship 1.2 < SD32/SD41 < 1.5, that is, the maximum effective half-caliber of the image side surface of the third lens element L3 is greater than the maximum effective half-caliber of the object side surface of the fourth lens element L4, the movement stroke of the second lens group G2 is reduced, and the spherical aberration and the coma aberration introduced by the first lens group G1 are reduced, so that the imaging quality of the optical lens 100 is improved.

In some embodiments, the optical lens 100 satisfies the following relationship: 1 < R3/fmax < 1.3, wherein R3 is the radius of curvature of the object side surface of the second lens L2 at the optical axis. The ratio of the radius of curvature of the object side surface of the second lens element L2 to the maximum focal length of the optical lens assembly 100 is controlled, so that the surface complexity of the second lens element L2 can be reduced, the increase of curvature of field and distortion can be effectively suppressed, and the molding difficulty of the second lens element L2 can be reduced.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.25 < R11/fmax < 0.35, wherein R11 is the radius of curvature of the object side surface of the sixth lens L6 at the optical axis. By controlling the ratio of the object side surface of the sixth lens L6 to the maximum focal length of the optical lens 100, the surface complexity of the sixth lens L6 can be reduced, thereby effectively suppressing the increase of curvature of field and distortion and reducing the molding difficulty of the sixth lens L6. In addition, the back focus of the optical lens 100 can be effectively controlled, so that the overlength of the optical lens 100 is avoided, and the miniaturization design of the optical lens 100 is facilitated.

In some embodiments, the optical lens 100 satisfies the following relationship: 2 < CT3/CT2 < 4, wherein CT3 is the thickness of the third lens L3 on the optical axis (i.e. the center thickness of the third lens L3), and CT2 is the thickness of the second lens L2 on the optical axis (i.e. the center thickness of the second lens L2). By controlling the ratio of the central thicknesses of the third lens L3 and the second lens L2, the overall thickness of the first lens group G1 can be effectively controlled, thereby realizing a miniaturized design of the optical lens 100 and being beneficial to reducing the sensitivity of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 4 < CT1/CT2 < 7, wherein CT1 is the thickness of the first lens L1 on the optical axis (i.e. the center thickness of the first lens L1). By controlling the ratio of the center thicknesses of the first lens L1 and the second lens L2, the overall thickness of the first lens group G1 can be effectively controlled, thereby realizing a miniaturized design of the optical lens 100 and being beneficial to reducing the sensitivity of the optical lens 100.

The optical lens 100 of the present embodiment will be described in detail below with reference to specific parameters.

First embodiment

As shown in fig. 1A and 2A, the optical lens 100 according to the first embodiment of the present application includes a diaphragm 102, 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 filter 70 sequentially disposed from an object side to an image side along an optical axis.

Further, the refractive power distribution of the first lens element L1 to the sixth lens element L6 is as described above, and will not be described here.

In the present embodiment, the object-side surface 11 and the image-side surface 12 of the first lens element L1 are convex at a paraxial region; the object side surface 21 and the image side surface 22 of the second lens element L2 are convex and concave at a paraxial region thereof; the object side surface 31 and the image side surface 32 of the third lens element L3 are convex at a paraxial region; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are concave and convex at a paraxial region thereof; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are concave at a paraxial region; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are convex and concave, respectively, at the optical axis.

Specifically, the parameters of the optical lens 100 are given in table 1 below. The elements from the object side to the image side along the optical axis of the optical lens 100 are sequentially arranged in the order of the elements from top to bottom in table 1. In the same lens element, the surface with smaller surface number is the object side surface of the lens element, and the surface with larger surface number is the image side surface of the lens element, i.e., the surface numbers 1 and 2 correspond to the object side surface and the image side surface of the first lens element L1, respectively. The radius Y in table 1 is the radius of curvature of the object side or image side of the corresponding plane number at the optical axis. The first value in the "thickness" parameter row 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 latter surface on the optical axis. The value of the aperture 102 in the "thickness" parameter row is the distance between the aperture 102 and the vertex of the subsequent surface (the vertex refers to the intersection point of the surface and the optical axis), and the direction from the object side surface of the first lens L1 to the image side surface of the last lens is the positive direction of the optical axis by default, when the value is negative, it indicates that the aperture 102 is disposed on the image side of the vertex of the subsequent surface, and when the thickness of the aperture 102 is positive, the aperture 102 is on the object side of the vertex of the subsequent surface. It is understood that the units of Y radius, thickness, and focal length in Table 1 are all mm. And refractive index, abbe number, etc. in Table 1 were obtained at a reference wavelength of 587.56nm, and focal length was obtained at a reference wavelength of 555 nm. Considering that the optical lens of the present application can achieve inner focusing, it has a far focus state and a near focus state, and thus has different object distances a in the far focus state and the near focus state, respectively, while the air interval T34 (i.e., B in table 1) in the optical axis direction of the third lens L3 and the fourth lens L4 in the far focus state and the near focus state is different. And, as can be seen from the foregoing, the filter 70 is able to follow the second lens group G2 in the optical axis direction, based on which the distance between the filter 70 and the imaging surface 101 of the optical lens 100 (i.e., C in table 1 below) is also different in the far focus state and the near focus state.

Based on this, table 2 is organized, values of A, B, C, f, TTL, FNO, FOV in far and near focus states are given in table 2, and units of parameters other than FOV in deg and FNO in mm are given in table 2.

In addition, in the following table 1 and table 3, the surface numbers 1 and 2 correspond to the object side surface 11 and the image side surface 12 of the first lens element L1, the surface numbers 3 and 4 correspond to the object side surface 21 and the image side surface 22 of the second lens element L2, respectively, and the surface numbers 11 and 12 correspond to the object side surface 61 and the image side surface 62 of the sixth lens element L6, respectively.

In the first embodiment, the object side surface and the image side surface of any one of the first lens L1 to the sixth lens are aspherical, and the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the curvature of the aspherical surface at the optical axis, c=1/Y (i.e., paraxial curvature c is the inverse of the radius of curvature Y in table 1 below); k is a conical coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. The following Table 3 shows the higher order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for the face numbers 1-12 in the first embodiment, wherein the higher order term coefficients A22, A24, A26, A28 and A30 are also given for the face numbers 7-12.

TABLE 1

TABLE 2

TABLE 3 Table 3

Referring to fig. 1B and fig. 2B, (a) in fig. 1B and fig. 2B shows the longitudinal spherical aberration curves of the optical lens 100 of the first embodiment at wavelengths of 470nm, 510nm, 555nm, 610nm and 650 nm. In fig. 1B and 2B, (a) the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from fig. 1B and fig. 2B (a), the spherical aberration value of the optical lens 100 in the first embodiment is better, which indicates that the imaging quality of the optical lens 100 in the present embodiment is better.

Referring to fig. 1B and fig. 2B, (B) in fig. 1B and fig. 2B is a light astigmatism diagram of the optical lens 100 at a wavelength of 555nm in the first embodiment. Wherein, the abscissa along the X-axis direction represents focus offset, and the ordinate along the Y-axis direction represents image height in mm. As can be seen from fig. 1B and fig. 2B, at this wavelength, the astigmatism of the optical lens 100 is well compensated.

Referring to fig. 1B and fig. 2B, (C) in fig. 1B and fig. 2B is a distortion curve diagram of the optical lens 100 at a wavelength of 555nm in the first embodiment. Wherein, the abscissa along the X-axis direction represents distortion, and the ordinate along the Y-axis direction represents image height in mm. As can be seen from fig. 1B and fig. 2B (C), the distortion of the optical lens 100 is well corrected at this wavelength.

Second embodiment

As shown in fig. 3A and 4A, in the present embodiment, the refractive powers of the first lens element L1 to the sixth lens element L6 are the same as those of the first embodiment, and the respective surface types of the first lens element L1 to the sixth lens element L6 are the same as those of the first embodiment, which is not repeated here.

Specifically, the parameters of the optical lens 100 are given in table 4 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. Accordingly, table 5 shows the values of the parameters of the optical lens in the far-focus state and the near-focus state, respectively. The following table 6 gives the higher order coefficients that can be used for each aspherical lens in the second embodiment.

TABLE 4 Table 4

TABLE 5

TABLE 6

Referring to fig. 3B and 4B, as can be seen from the (a) longitudinal spherical aberration curve, (B) optical astigmatism curve, and (C) distortion curve in fig. 3B and 4B, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of the embodiment has good imaging quality. In addition, regarding the wavelengths corresponding to the curves in (a) in fig. 3B, 4B, (B) in fig. 3B, 4B, and (C) in fig. 3B, 4B, reference may be made to what is described in the first embodiment regarding (a) in fig. 1B, 2B, (B) in fig. 1B, 2B, (C) in fig. 1B, 2B, and will not be repeated here.

Third embodiment

As shown in fig. 5A and 6A, in the present embodiment, for the refractive powers of the first lens element L1 to the sixth lens element L6, please refer to the foregoing embodiment, and the description thereof is omitted. For the object-side and image-side surfaces of the first lens element L1-the sixth lens element L6, only the image-side surface 42 of the fourth lens element L4 is concave, and the object-side and image-side surfaces of the other lens elements are similar to the first embodiment.

Specifically, the parameters of the optical lens 100 are given in table 7 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. Accordingly, table 8 shows the values of the parameters of the optical lens in the far focus state and the near focus state, respectively. The following table 9 gives the higher order coefficients that can be used for each aspherical lens in the third embodiment.

TABLE 7

TABLE 8

TABLE 9

Referring to fig. 5B and 6B, as can be seen from the (a) longitudinal spherical aberration curve, (B) optical astigmatism curve, and (C) distortion curve in fig. 5B and 6B, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of the embodiment has good imaging quality. In addition, regarding the wavelengths corresponding to the curves in (a) in fig. 5B, 6B, (B) in fig. 5B, 6B, and (C) in fig. 5B, 6B, reference may be made to what is described in the first embodiment regarding (a) in fig. 1B, 2B, (B) in fig. 1B, 2B, (C) in fig. 1B, 2B, and the description thereof will not be repeated here.

Fourth embodiment

As shown in fig. 7A and 8A, in the present embodiment, the refractive power designs of the first lens element L1 to the sixth lens element L6 are the same as those of the first embodiment. For the planar designs of the first lens element L1-sixth lens element L6, only the image-side surface 42 of the fourth lens element L4 is concave at a paraxial region, the object-side surface of the fifth lens element L5 is convex at a paraxial region, and the planar shapes of the remaining lens elements at the paraxial region are the same as those of the first embodiment.

Specifically, the parameters of the optical lens 100 are given in table 10 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. Accordingly, table 11 shows the values of the parameters of the optical lens in the far focus state and the near focus state, respectively. The following table 12 gives the higher order coefficients that can be used for each aspherical lens in the fourth embodiment.

Table 10

TABLE 11

Table 12

Referring to fig. 7B and 8B, as shown in fig. 7B and 8B, the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled according to the (a) longitudinal spherical aberration curve, the (B) optical astigmatism curve and the (C) distortion curve, so that the optical lens 100 of the embodiment has good imaging quality. In addition, regarding the wavelengths corresponding to the curves in (a) in fig. 7B, 8B, (B) in fig. 7B, 8B, and (C) in fig. 7B, 8B, reference may be made to what is described in the first embodiment regarding (a) in fig. 1B, 2B, (B) in fig. 1B, 2B, (C) in fig. 1B, 2B, and will not be repeated here.

Fifth embodiment

As shown in fig. 9A and 10A, in the present embodiment, the refractive power designs of the first lens element L1 to the sixth lens element L6 are the same as those of the first embodiment. For the object-side and image-side surfaces of the first lens element L1-the sixth lens element L6, only the image-side surface 42 of the fourth lens element L4 is concave, and the object-side and image-side surfaces of the other lens elements are similar to the first embodiment.

Specifically, the parameters of the optical lens 100 are given in table 13 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. Accordingly, table 14 shows the values of the parameters of the optical lens in the far focus state and the near focus state, respectively. The following table 15 gives the higher order coefficients that can be used for each aspherical lens in the fifth embodiment.

TABLE 13

TABLE 14

TABLE 15

Referring to fig. 9B and 10B, as can be seen from the (a) longitudinal spherical aberration curve, (B) optical astigmatism curve, and (C) distortion curve in fig. 9B and 10B, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of the embodiment has good imaging quality. In addition, regarding the wavelengths corresponding to the curves in (a) in fig. 9B, 10B, (B) in fig. 9B, 10B, and (C) in fig. 9B, 10B, reference may be made to what is described in the first embodiment regarding (a) in fig. 1B, 2B, (B) in fig. 1B, 2B, (C) in fig. 1B, 2B, and will not be repeated here.

Referring to Table 16, table 16 is a summary of the ratios of the relationships in the first to fifth embodiments of the present application.

Table 16

Table 17 is a summary of values of other parameters of the optical lens in the first to fifth embodiments of the present application. Wherein f1, f2, f3, f4, f5, f6 are focal lengths of the first lens L1 to the sixth lens L6, respectively. R1 and R2 are the radii of curvature of the object-side surface and the image-side surface of the first lens element L1, R3 and R4 are the radii of curvature of the object-side surface and the image-side surface of the second lens element L2, R5 and R6 are the radii of curvature of the object-side surface and the image-side surface of the third lens element L3, R7 and R8 are the radii of curvature of the object-side surface and the image-side surface of the fourth lens element L4, R9 and R10 are the radii of curvature of the object-side surface and the image-side surface of the fifth lens element L5, and R11 and R12 are the radii of curvature of the object-side surface and the image-side surface of the sixth lens element L6, respectively.

The optical lens 100 satisfies: 0.45 < f1/fmax < 0.6, -0.9 < f2/fmax < -0.7,0.4 < f3/fmax < 0.65, -0.7 < f4/fmax < -0.3, -0.5 < f5/fmax < -0.4,0.4 < f6/fmax < 0.7.

Similarly, the optical lens 100 satisfies: 0.3 < R1/fmax < 0.5, -1.5 < R2/fmax < -0.9,1 < R3/fmax < 1.3,0.3 < R4/fmax < 0.45,0.5 < R5/fmax < 0.7, -0.6 < R6/fmax < -0.4, -0.45 < R7/fmax < -0.2,1 < -I R8/fmax I < 10,1 < |R9/fmax I < 56,0.2 < R10/fmax < 0.4,0.25 < R11/fmax < 0.35,1.1 < R12/fmax < 1.8.

TABLE 17

Referring to fig. 11, the present application further discloses an image capturing module 200, wherein the image capturing module 200 includes an image sensor 201 and the optical lens 100 according to any one of the first to fifth embodiments of the first aspect, and the image sensor 201 is disposed on an image side of the optical lens 100. The optical lens 100 is configured to receive an optical signal of a subject and project the optical signal to the image sensor 201, and the image sensor 201 is configured to convert the optical signal corresponding to the subject into an image signal, which is not described herein. It can be appreciated that the image capturing module 200 having the optical lens 100 has all the technical effects of the optical lens 100, and is capable of achieving miniaturization and thinning and having a large image plane. Since the above technical effects are described in detail in the embodiment of the optical lens 100, the description thereof is omitted here.

Referring to fig. 12, the application further discloses an electronic device 300, where the electronic device 300 includes a housing 301 and the above-mentioned camera module 200, and the camera module 200 is disposed in the housing. Specifically, the camera module 200 may be disposed inside the housing 301 or disposed on the housing 301. The electronic device 300 may be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a smart watch, a monitor, etc. It can be appreciated that the electronic device 300 having the image capturing module 200 also has all the technical effects of the optical lens 100. That is, the imaging device has the characteristics of large image surface while realizing miniaturization and thinning, and is beneficial to improving imaging quality. Since the above technical effects are described in detail in the embodiment of the optical lens 100, the description thereof is omitted here.

The optical lens, the camera module and the electronic device disclosed in the embodiments of the present invention are described in detail, and specific examples are applied to the description of the principles and the implementation modes of the present invention, and the description of the above embodiments is only used to help understand the optical lens, the camera module, the electronic device and the core ideas thereof; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the idea of the present invention, the present disclosure should not be construed as limiting the present invention in summary.

Claims

1. An optical lens, characterized in that six lenses with refractive power in total, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are disposed in order from an object side to an image side along an optical axis;

the first lens, the second lens and the third lens are a first lens group, the fourth lens, the fifth lens and the sixth lens are a second lens group, the first lens group is fixed relative to an imaging surface of the optical lens, and the second lens group moves between the first lens group and the imaging surface of the optical lens along the optical axis direction;

The first lens element with positive refractive power, the second lens element with negative refractive power, the third lens element with positive refractive power, the fourth lens element with negative refractive power, the fifth lens element with negative refractive power, and the sixth lens element with positive refractive power;

the optical lens satisfies the following relation:

f123/fmax is more than 0.4 and less than 0.6, -F456/fmax is more than 0.5 and less than-0.3; and CT2 is more than 2 and CT3/CT2 is more than 4;

2. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

0.74 < DLmax/TTL < 0.85, and/or 0.9 < TTL/fmax < 1.05; and/or, 1.7 < FNO < 2.1; and/or 30deg < FOV < 36deg, and/or 0.3mm < B2-B1 < 0.5mm;

wherein DLmax is the maximum distance between the object side surface of the first lens and the image side surface of the sixth lens on the optical axis, TTL is the distance between the object side surface of the first lens and the image plane of the optical lens on the optical axis, FNO is the f-number of the optical lens, FOV is the maximum field angle of the optical lens, B1 is the distance between the first lens group and the second lens group on the optical axis when the second lens group is located at the near-focus position, and B2 is the distance between the first lens group and the second lens group on the optical axis when the second lens group is located at the far-focus position.

3. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

3 < |T23|+|T45|/|T34 max| < 3.5; and/or 0.25 < ET1/CT1 < 0.4; and/or, 4 < CT1/CT2 < 7;

wherein T23 is an air space between the second lens and the third lens on the optical axis, T34max is a maximum air space between the third lens and the fourth lens on the optical axis, T45 is an air space between the fourth lens and the fifth lens on the optical axis, ET1 is a distance from a maximum effective half caliber of an object side surface of the first lens to a maximum effective half caliber of an image side surface of the first lens in a direction parallel to the optical axis, and CT1 is a thickness of the first lens at the optical axis.

4. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

1.15 < |F123/F456| < 1.4; and/or-0.9 < f2/fmax < -0.75;

wherein f2 is the focal length of the second lens.

5. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

0.6 < |SAG11|+|SAG12|/CT1 < 0.75; and/or 1.2 < |SAG51|+|SAG52|/CT5 < 1.75; SAG31/CT3 is more than 0.1 and less than 0.18;

Wherein SAG11 is a distance from a maximum effective aperture of an object side surface of the first lens to an intersection point of the object side surface of the first lens and the optical axis in the optical axis direction, SAG12 is a distance from a maximum effective aperture of an image side surface of the first lens to an intersection point of the image side surface of the first lens and the optical axis in the optical axis direction, CT1 is a thickness of the first lens on the optical axis, SAG51 is a distance from a maximum effective aperture of the object side surface of the fifth lens to an intersection point of the object side surface of the fifth lens and the optical axis in the optical axis direction, SAG52 is a distance from a maximum effective aperture of an image side surface of the fifth lens to an intersection point of the image side surface of the fifth lens and the optical axis in the optical axis direction, and CT5 is a thickness of the fifth lens on the optical axis; SAG31 is a distance in the optical axis direction from a maximum effective aperture of the object side surface of the third lens to an intersection point of the object side surface of the third lens and the optical axis.

6. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

SDS4/SDS5 is less than 0.7 and less than 0.8; and/or 1.2 < SD32/SD41 < 1.5; and/or 1.3mm < SD62/FNO < 1.65mm;

wherein SD32 is the maximum effective half-aperture of the image-side surface of the third lens element, SD41 is the maximum effective half-aperture of the object-side surface of the fourth lens element, SDs4 is the larger of the maximum effective aperture of the object-side surface and the maximum effective aperture of the image-side surface of the fourth lens element, and SDs5 is the larger of the maximum effective aperture of the object-side surface and the maximum effective aperture of the image-side surface of the fifth lens element; SD62 is the maximum effective half-caliber of the image side of the sixth lens and FNO is the f-number of the optical lens.

7. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

r3/fmax is more than 1 and less than 1.3; and/or, 0.25 < R11/fmax < 0.35;

wherein R3 is a radius of curvature of the object side surface of the second lens element at the optical axis, and R11 is a radius of curvature of the object side surface of the sixth lens element at the optical axis.

8. The optical lens of claim 1, further comprising an optical filter disposed between the second lens group and the imaging surface of the optical lens, wherein the optical filter is moved between the sixth lens and the imaging surface of the optical lens in the optical axis direction by the second lens group.

9. An imaging module comprising an image sensor and the optical lens according to any one of claims 1 to 8, wherein the image sensor is disposed on an image side of the optical lens.

10. An electronic device, comprising a housing and the camera module of claim 9, wherein the camera module is disposed on the housing.