CN113625425A

CN113625425A - Optical lens, camera module and electronic equipment

Info

Publication number: CN113625425A
Application number: CN202110841061.0A
Authority: CN
Inventors: 杨懿; 刘秀; 李明
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2021-11-09
Anticipated expiration: 2041-07-23
Also published as: CN113625425B

Abstract

The invention discloses an optical lens, a camera module and electronic equipment, wherein the optical lens comprises a first lens with positive refractive power, which is arranged in sequence from an object side to an image side along an optical axis, and the object side surface of the first lens is a convex surface; a second lens element with refractive power having a concave image-side surface; a third lens element with negative refractive power having a convex and concave object-side and image-side surfaces; a fourth lens element with positive refractive power having a convex object-side surface and a concave image-side surface; a fifth lens element with refractive power having a convex and concave object-side and image-side surfaces; a sixth lens element with positive refractive power having a concave object-side surface and a convex image-side surface; a seventh lens element with positive refractive power having a convex object-side surface; an eighth lens element with refractive power having a concave object-side surface and a convex image-side surface; the ninth lens element with negative refractive power has a concave object-side surface and a concave image-side surface. The optical lens, the camera module and the electronic equipment provided by the embodiment of the invention can realize a high-quality imaging effect while realizing a miniaturized design.

Description

Optical lens, camera module and electronic equipment

Technical Field

The invention relates to the technical field of optical imaging, in particular to an optical lens, a camera module and electronic equipment.

Background

With the development of technology, the demand for miniaturization and high-quality imaging quality of optical lenses is increasing. In various electronic devices, such as mobile phones, tablet computers, telephone watches, and the like, it is becoming popular to use optical lenses that are light, thin, short, and have large apertures. However, in the current market, the photographing and imaging quality of portable large-aperture lenses such as four-piece lenses, five-piece lenses and six-piece lenses is not good enough, and the requirements of users on the imaging quality of the lenses cannot be met.

Disclosure of Invention

The embodiment of the invention discloses an optical lens, a camera module and electronic equipment, which can improve the imaging quality of the optical lens while realizing miniaturization of the optical lens.

In order to achieve the above object, a first aspect of the present invention discloses an optical lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens;

the first lens element with positive refractive power has a convex object-side surface at paraxial region;

the second lens element with refractive power has a concave image-side surface at paraxial region;

the third lens element with negative refractive power has a convex object-side surface at a paraxial region thereof and a concave image-side surface at a paraxial region thereof;

the fourth lens element with positive refractive power has a convex object-side surface at a paraxial region thereof and a concave image-side surface at a paraxial region thereof;

the fifth lens element with refractive power has a convex object-side surface at a paraxial region thereof and a concave image-side surface at a paraxial region thereof;

the sixth lens element with positive refractive power has a concave object-side surface at a paraxial region thereof and a convex image-side surface at a paraxial region thereof;

the seventh lens element with positive refractive power has a convex object-side surface at paraxial region;

the eighth lens element with refractive power has a concave object-side surface at a paraxial region thereof and a convex image-side surface at a paraxial region thereof;

the ninth lens element with negative refractive power has a concave object-side surface and a concave image-side surface at a paraxial region.

In the optical lens system provided in this embodiment, the first lens element has positive refractive power, and the object-side surface of the first lens element is convex at a paraxial region thereof, so that a good ability to converge light can be achieved, thereby ensuring an imaging quality of the optical lens system, and a head aperture of the optical lens system can be reduced, thereby achieving a small design requirement of the optical lens system; the design that the image side surface of the second lens is concave at the paraxial region can further shorten the head length of the optical lens so as to save the assembly space; the third lens element with negative refractive power and the fourth lens element with positive refractive power are matched, and the opposite refractive powers of the third lens element and the fourth lens element can mutually offset partial aberration generated by each other, so that the third lens element and the fourth lens element contribute less aberration in the optical lens, and meanwhile, the third lens element and the fourth lens element are designed to be convex at an object side surface at a paraxial region and concave at an image side surface at a paraxial region, so that the shape difference of the third lens element and the fourth lens element can be reduced, and the assembly matching performance and the yield of the optical lens are improved; the refractive power distribution and the surface type design of the fifth lens element to the eighth lens element enable the fifth lens element to the eighth lens element to better receive the light emitted from the lens group (i.e. the first lens element to the fourth lens element), and simultaneously enable the light to be more stably emitted to the ninth lens element, so that the influence of the light path change of the light on the imaging quality is reduced; and finally, matching with the ninth lens element with negative refractive power, the light rays incident on the ninth lens element are emitted at a more proper angle to enlarge the field range of the optical lens, and the object-side surface and the image-side surface of the ninth lens element are both concave in the paraxial region, so that the total length of the optical lens is further shortened, and meanwhile, the aberrations generated by the first lens element to the eighth lens element can be corrected to realize high-quality imaging of the optical lens.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.5< SD11/ImgH < 0.6;

wherein SD11 is a half of the maximum effective aperture of the object-side surface of the first lens element, and ImgH is the radius of the maximum effective imaging circle of the optical lens.

When the above relation is satisfied, a half of the maximum effective aperture of the object-side surface of the first lens and the radius of the maximum effective imaging circle of the optical lens can be reasonably configured to reduce the radial size of the first lens, thereby reducing the head size of the optical lens, saving the assembly space, and realizing the smooth assembly of the optical lens.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.6< ET2/CT2< 1.3;

ET2 is a distance from the maximum effective half aperture of the object-side surface of the second lens element to the maximum effective half aperture of the image-side surface of the second lens element in the optical axis direction, i.e., an edge thickness of the second lens element, and CT2 is a thickness of the second lens element on the optical axis, i.e., a center thickness of the second lens element.

Because the ratio of the edge thickness to the center thickness of the lens can affect the molding yield of the lens and the convergence capacity of light rays, the ratio of the effective aperture edge thickness to the center thickness of the second lens is controlled within the above range, so that the molding yield of the second lens can be ensured, and meanwhile, the optical path difference of the optical lens can be effectively balanced, so that the field curvature of the optical lens can be corrected, and the imaging stability of the optical lens can be further realized.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 2< | f34/f5678| < 6;

wherein f34 is a combined focal length of the third lens and the fourth lens, and f5678 is a combined focal length of the fifth lens, the sixth lens, the seventh lens, and the eighth lens.

The third lens to the eighth lens are arranged in the middle of the optical lens, so that the combined focal length of the third lens and the fourth lens and the combined focal length of the fifth lens, the sixth lens, the seventh lens and the eighth lens are reasonably distributed, light rays entering the optical lens can be stably transmitted, the risk of total internal reflection of the light rays can be reduced, the transmission efficiency of the light rays is improved, and the light sensing level and the imaging quality of the optical lens are improved.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 4< | (R42+ R41)/(R42-R41) | < 10;

wherein R41 is a radius of curvature of an object-side surface of the fourth lens element at the optical axis, and R42 is a radius of curvature of an image-side surface of the fourth lens element at the optical axis.

When the relational expression is satisfied, the relation between the curvature radius of the object side surface of the fourth lens at the optical axis and the curvature radius of the image side surface of the fourth lens at the optical axis can be reasonably configured, so that the surface shapes of the object side surface and the image side surface of the fourth lens cannot be excessively bent, the situation that the lens is difficult to process and manufacture due to excessively complex lens surface types is avoided, and the yield of the lens is improved; in addition, the fourth lens element can correct astigmatism and aberration and reduce the performance change sensitivity of the optical lens when the relational expression is satisfied, and the imaging stability of the optical lens is ensured.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.8< f1/f < 1.5;

wherein f1 is the focal length of the first lens, and f is the effective focal length of the optical lens.

Because the first lens is the lens closest to the object side in the optical lens, reasonably controlling the focal length of the first lens and the effective focal length of the optical lens can ensure that incident light can better converge on the imaging surface of the optical lens, and simultaneously, the first lens is easy to process and manufacture, and the processing difficulty of the lens is reduced.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 3mm < f/FNO <5 mm;

wherein f is the effective focal length of the optical lens, and FNO is the f-number of the optical lens.

When the ratio of the effective focal length of the optical lens to the f-number of the optical lens is controlled within the above range, the optical lens can obtain a long-focus characteristic while satisfying miniaturization, and the large aperture can obtain a sufficient light transmission amount when the optical lens is used for shooting, so that the optical lens can obtain an imaging effect with high image quality and high definition.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 2.5< FNO/tan (hfov) < 3.5;

wherein FNO is an f-number of the optical lens, HFOV is a half of a maximum field angle of the optical lens, and tan (HFOV) is a tangent value of HFOV.

Since the f-number of the optical lens affects the light input amount of the optical lens, the maximum field angle of the optical lens affects the imaging range of the optical lens, and when the imaging range of the optical lens is too large and the light input amount is insufficient, the imaging quality of the optical lens is degraded. Therefore, when the optical lens meets the relational expression, the optical lens can obtain a proper f-number and a maximum field angle range so as to balance the relation between the light incoming quantity and the imaging range of the optical lens, further enhance the low-light shooting capability and the close-up effect of the optical lens, realize clear shooting of distant scenes and present a clearer shooting effect.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 1.2< TTL/f < 1.3;

wherein, TTL is a distance from an object side surface of the first lens element to an image plane of the optical lens on the optical axis, i.e., a total length of the optical lens, and f is an effective focal length of the optical lens.

Because the total length of the optical lens is an important parameter in the miniaturization design of the optical lens, and the effective focal length of the optical lens has a large influence on the imaging quality, the optical lens can obtain a longer focal length while realizing miniaturization by reasonably allocating the relationship between the total length of the optical lens and the effective focal length of the optical lens, so that when the optical lens meets the miniaturization design requirement, a distant scene can be shot, and high-quality imaging is presented.

In a second aspect, the present invention discloses a camera module, which includes an image sensor and the optical lens of the first aspect, wherein the image sensor is disposed on the image side of the optical lens.

The camera module with the optical lens can effectively improve the imaging quality while meeting the miniaturization design.

In a third aspect, the present invention further discloses an electronic device, where the electronic device includes a housing and the camera module according to the second aspect, and the camera module is disposed on the housing.

The electronic equipment with the camera module can effectively improve the imaging quality while meeting the miniaturization design.

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

according to the optical lens, the camera module and the electronic device provided by the embodiment of the invention, the first lens of the optical lens has positive refractive power, and the object side surface of the first lens is in a convex surface design at the position close to the optical axis, so that good capability of converging light can be realized, the imaging quality of the optical lens is ensured, and meanwhile, the head caliber of the optical lens can be reduced, so that the miniaturization design requirement of the optical lens is realized; the design of the concave image side surface of the second lens element at the paraxial region can further shorten the head length of the optical lens element, thereby saving the assembly space; the third lens element with negative refractive power and the fourth lens element with positive refractive power are matched, and the opposite refractive powers of the third lens element and the fourth lens element can mutually counteract partial aberration generated by each other, so that the third lens element and the fourth lens element contribute less aberration percentage in the optical lens, and meanwhile, the surface type design of the third lens element and the surface type design of the fourth lens element are that the object side surface is a convex surface at a paraxial region and the image side surface is a concave surface at the paraxial region, so that the shape difference of the third lens element and the fourth lens element can be reduced, and the matching performance and the yield of the optical lens assembly can be improved; the refractive power distribution and the surface type design of the fifth lens element to the eighth lens element enable the fifth lens element to the eighth lens element to better receive the light emitted from the lens group (i.e. the first lens element to the fourth lens element), and simultaneously enable the light to be more stably emitted to the ninth lens element, so that the sensitivity of the light path change on the influence of the imaging quality is reduced; and finally, matching with a ninth lens element with negative refractive power, the light rays incident on the ninth lens element are emitted at a more proper angle to enlarge the field range of the optical lens, and meanwhile, the object-side surface and the image-side surface of the ninth lens element are both concave in the paraxial region, so that the total length of the optical lens is further shortened, and meanwhile, the aberrations generated by the first lens element to the eighth lens element can be corrected to realize high-quality imaging of the optical lens.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used 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 it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an optical lens disclosed in a first embodiment of the present application;

fig. 2 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 3 is a schematic structural diagram of an optical lens disclosed in the second embodiment of the present application;

fig. 4 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 5 is a schematic structural diagram of an optical lens disclosed in the third embodiment of the present application;

fig. 6 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 7 is a schematic structural diagram of an optical lens disclosed in a fourth embodiment of the present application;

fig. 8 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 9 is a schematic structural diagram of an optical lens disclosed in a fifth embodiment of the present application;

fig. 10 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 11 is a schematic structural diagram of an optical lens disclosed in a sixth embodiment of the present application;

fig. 12 is a ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 13 is a schematic structural diagram of the camera module disclosed in the present application;

fig. 14 is a schematic structural diagram of an electronic device disclosed in the present application.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

Referring to fig. 1, according to a first aspect of the present application, an optical lens 100 is disclosed, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9, which are disposed in order from an object side to an image side along an optical axis O. During imaging, light rays enter the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8 and the ninth lens L9 in sequence from the object side of the first lens L1, and are finally imaged on the imaging surface 101 of the optical lens 100. The first lens element L1 has positive refractive power, the second lens element L2 has positive refractive power or negative refractive power, the third lens element L3 has negative refractive power, the fourth lens element L4 has positive refractive power, the fifth lens element L5 has positive refractive power or negative refractive power, the sixth lens element L6 has positive refractive power, the seventh lens element L7 has positive refractive power, the eighth lens element L8 has positive refractive power or negative refractive power, and the ninth lens element L9 has negative refractive power.

Further, the object-side surface 11 of the first lens element L1 is convex at the paraxial region O, and the image-side surface 12 of the first lens element L1 is convex or concave at the paraxial region O; the object-side surface 21 of the second lens element L2 is convex or concave at the paraxial region O, and the image-side surface 22 of the second lens element L2 is concave at the paraxial region O; the object-side surface 31 of the third lens element L3 is convex at the paraxial region O, and the image-side surface 32 of the third lens element L3 is concave at the paraxial region O; the object-side surface 41 of the fourth lens element L4 is convex at the paraxial region O, and the image-side surface 42 of the fourth lens element L4 is concave at the paraxial region O; the object-side surface 51 of the fifth lens element L5 is convex at the paraxial region O, and the image-side surface 52 of the fifth lens element L5 is concave at the paraxial region O; the object-side surface 61 of the sixth lens element L6 is concave at the paraxial region O, and the image-side surface 62 of the sixth lens element L6 is convex at the paraxial region O; the object-side surface 71 of the seventh lens element L7 is convex at the paraxial region O, and the image-side surface 72 of the seventh lens element L7 is convex or concave at the paraxial region O; the object-side surface 81 of the eighth lens element L8 is concave at the paraxial region O, and the image-side surface 82 of the eighth lens element L8 is convex at the paraxial region O; the object-side surface 91 of the ninth lens element L9 is concave at the paraxial region O, and the image-side surface 92 of the ninth lens element L9 is concave at the paraxial region O.

The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, and the ninth lens L9 are all glass lenses, so that the optical lens 100 has a good optical effect and can reduce the temperature sensitivity of the optical lens 100.

Alternatively, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, and the ninth lens L9 may be made of plastic, so that the optical lens 100 is light and thin and can be easily processed into a lens complex shape.

In some embodiments, the optical lens 100 further includes a stop 102, and the stop 102 may be an aperture stop 102 and/or a field stop 102, which may be disposed between the object side of the optical lens 100 and the object side 11 of the first lens L1. It is understood that, in other embodiments, the stop 102 may also be disposed between other lenses, for example, between the image-side surface 12 of the first lens L1 and the object-side surface 21 of the second lens L2, and the arrangement may be adjusted according to practical situations, and the present embodiment is not limited in particular.

In some embodiments, the optical lens 100 further includes an optical filter 10, and the optical filter 10 is disposed between the ninth lens element L9 and the image plane 101 of the optical lens 100. The optical filter 10 can adopt an infrared filter, so that infrared light can be filtered, the imaging quality is improved, and the imaging is more in line with the visual experience of human eyes. It is understood that the optical filter 10 may be made of an optical glass coating film or a colored glass, and the specific choice may be made according to actual needs, and the embodiment is not particularly limited.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.5< SD11/ImgH < 0.6;

SD11 is half of the maximum effective aperture of the object-side surface 11 of the first lens L1, and ImgH is the radius of the maximum effective imaging circle of the optical lens 100. When the above relation is satisfied, a half of the maximum effective aperture of the object-side surface 11 of the first lens L1 and the radius of the maximum effective imaging circle of the optical lens 100 can be reasonably configured to reduce the radial dimension of the first lens L1, thereby reducing the head dimension of the optical lens 100, saving the assembly space, and achieving the smooth assembly of the optical lens 100. When the ratio is lower than the lower limit, the difference in the head-to-tail sizes of the optical lens 100 is too large, so that the production difficulty of the corresponding lens barrel is increased, and the assembly difficulty is also increased; when the ratio is higher than the upper limit, the size of the head of the optical lens 100 is too large, so that the hole is too large when the electronic device with the optical lens 100 is installed on the optical lens 100, which affects the aesthetic design of the electronic device, and further lowers the practicability of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.6< ET2/CT2< 1.3;

ET2 is the distance in the direction of the optical axis O from the maximum effective half aperture of the object-side surface 21 of the second lens L2 to the maximum effective half aperture of the image-side surface 22 of the second lens L2, i.e., the edge thickness of the second lens L2, and CT2 is the thickness of the second lens L2 on the optical axis O, i.e., the center thickness of the second lens L2. Because the ratio of the edge thickness to the center thickness of the lens affects the molding yield of the lens and the light convergence capability of the lens, the ratio of the effective aperture edge thickness to the center thickness of the second lens L2 is controlled within the above range, so that the molding yield of the second lens L2 can be ensured, and the optical path difference of the optical lens 100 can be effectively balanced, so as to correct the curvature of field of the optical lens 100, and further realize the imaging stability of the optical lens 100. When the ratio thereof is lower than the lower limit, the central thickness of the second lens L2 is too thick with respect to the edge thickness, resulting in too large field curvature of the optical lens 100; when the ratio is higher than the upper limit, the center thickness of the second lens L2 is too thin, so that the yield of the second lens L2 in the manufacturing process is reduced.

In some embodiments, the optical lens 100 satisfies the following relationship: 2< | f34/f5678| < 6;

where f34 is a combined focal length of the third lens L3 and the fourth lens L4, and f5678 is a combined focal length of the fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8. Since the third lens L3 to the eighth lens L8 are disposed in the middle of the optical lens 100, the combined focal length of the third lens L3 and the fourth lens L4 and the combined focal length of the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 are reasonably distributed, so that the light rays entering the optical lens 100 can be transmitted smoothly, the risk of total internal reflection of the light rays can be reduced, the transmission efficiency of the light rays can be improved, and the light sensing level and the imaging quality of the optical lens 100 can be improved.

In some embodiments, the optical lens 100 satisfies the following relationship: 4< | (R42+ R41)/(R42-R41) | < 10;

wherein R41 is a radius of curvature of the object-side surface 41 of the fourth lens element L4 along the optical axis O, and R42 is a radius of curvature of the image-side surface 42 of the fourth lens element L4 along the optical axis O. When the above relational expression is satisfied, the relationship between the curvature radius of the object-side surface 41 of the fourth lens L4 at the optical axis O and the curvature radius of the image-side surface 42 of the fourth lens L4 at the optical axis O can be configured reasonably, so that the surface shapes of the object-side surface 41 and the image-side surface 42 of the fourth lens L4 are not excessively curved, the situation that the lens surface type is too complicated to process and manufacture is avoided, and the yield of the lens is improved; in addition, by satisfying the above relational expression, astigmatism and aberration of the fourth lens element L4 can be corrected, and at the same time, the performance change sensitivity of the optical lens 100 can be reduced, thereby ensuring the imaging stability of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.8< f1/f < 1.5;

where f1 is the focal length of the first lens element L1, and f is the effective focal length of the optical lens system 100. Since the first lens element L1 is the lens element closest to the object side in the optical lens 100, reasonably controlling the focal length of the first lens element L1 and the effective focal length of the optical lens 100 can ensure that the incident light can better converge on the image plane 101 of the optical lens 100, and at the same time, the first lens element L1 can be easily manufactured, thereby reducing the difficulty in processing the lens element. When the ratio is lower than the lower limit, the focal length of the first lens L1 is too small, so that the light collection capability of the first lens L1 is reduced, the light flux of the optical lens 100 is reduced, and the imaging quality is reduced; when the ratio is higher than the upper limit, the effective focal length of the optical lens 100 is too small, which results in too short optical length, increasing the sensitivity of the optical lens 100, and simultaneously deteriorating the converging effect of the light on the image plane 101 of the optical lens 100, thereby resulting in the image quality of the optical lens 100 being degraded.

In some embodiments, the optical lens 100 satisfies the following relationship: 3mm < f/FNO <5 mm;

where f is the effective focal length of the optical lens 100, and FNO is the f-number of the optical lens 100. When the ratio of the effective focal length of the optical lens 100 to the f-number of the optical lens 100 is controlled within the above range, the optical lens 100 can obtain a telephoto characteristic while satisfying miniaturization, and the large aperture can obtain a sufficient amount of light passing through the optical lens 100 during shooting, so that the optical lens 100 can obtain an imaging effect with high image quality and high definition. When the ratio is lower than the lower limit, the diaphragm number of the optical lens 100 is too large, which results in an excessively small diaphragm and thus insufficient light inflow, so that the dark environment shooting effect of the optical lens 100 is reduced, and at this time, the effective focal length of the optical lens 100 is also small, which results in that the optical lens 100 cannot shoot a distant scene; when the ratio exceeds the upper limit, the diaphragm number of the optical lens 100 is too small, which results in too large diaphragm, so that the difficulty of designing and manufacturing the optical lens 100 is increased, and the effective focal length of the optical lens 100 is too long to enlarge the shooting field.

In some embodiments, the optical lens 100 satisfies the following relationship: 2.5< FNO/tan (hfov) < 3.5;

wherein FNO is an f-number of the optical lens 100, HFOV is a half of a maximum field angle of the optical lens 100, and tan (HFOV) is a tangent value of HFOV. Since the f-number of the optical lens 100 affects the light incident amount of the optical lens 100, the maximum field angle of the optical lens 100 affects the imaging range of the optical lens 100, and when the imaging range of the optical lens 100 is too large and the light incident amount is insufficient, the imaging quality of the optical lens 100 may be degraded. Therefore, when the optical lens 100 satisfies the above relation, the optical lens 100 can obtain a suitable f-number and a maximum field angle range to balance the relationship between the light incident amount and the imaging range of the optical lens 100, so as to enhance the low-light shooting capability and the close-up effect of the optical lens 100, and simultaneously, realize clear shooting of a distant scene and present a clearer shooting effect.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.2< TTL/f < 1.3;

wherein, TTL is a distance from the object-side surface 11 of the first lens element L1 to the image plane 101 of the optical lens system 100 on the optical axis O, i.e. the total length of the optical lens system 100, and f is an effective focal length of the optical lens system 100. Because the total length of the optical lens 100 is an important parameter in the miniaturization design of the optical lens 100, and the effective focal length of the optical lens 100 has a large influence on the imaging quality, the optical lens 100 can obtain a longer focal length while realizing miniaturization by reasonably adjusting the relationship between the total length of the optical lens 100 and the effective focal length of the optical lens 100, so that when the optical lens 100 meets the miniaturization design requirement, a distant scene can be shot, and high-quality imaging is presented. When the ratio is lower than the lower limit, the effective focal length of the optical lens 100 is too large, which is not beneficial to enlarging the field angle of the optical lens 100 and is difficult to shoot a wider scene; when the ratio exceeds the upper limit, the total length of the optical lens 100 is too long, the assembly difficulty is increased, and the effective focal length of the optical lens 100 is too small to clearly shoot a distant scene.

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

First embodiment

A schematic structural diagram of an optical lens 100 disclosed in the first embodiment of the present application is shown in fig. 1, where the optical lens 100 includes a stop 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, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a filter 10, which are arranged in order from an object side to an image side along an optical axis O.

Further, the first lens element L1 has positive refractive power, the second lens element L2 has positive refractive power, the third lens element L3 has negative refractive power, the fourth lens element L4 has positive refractive power, the fifth lens element L5 has negative refractive power, the sixth lens element L6 has positive refractive power, the seventh lens element L7 has positive refractive power, the eighth lens element L8 has negative refractive power, and the ninth lens element L9 has negative refractive power.

Further, the object-side surface 11 and the image-side surface 12 of the first lens element L1 are convex and concave, respectively, at the paraxial region O; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are respectively convex and concave at the paraxial region O; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are convex and concave, respectively, at a paraxial region O; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex and concave, respectively, at a paraxial region O; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are convex and concave, respectively, at a paraxial region O; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are concave and convex, respectively, at a paraxial region O; the object-side surface 71 and the image-side surface 72 of the seventh lens element L7 are convex at the paraxial region O; the object-side surface 81 and the image-side surface 82 of the eighth lens element L8 are concave and convex, respectively, at the paraxial region O; the object-side surface 91 and the image-side surface 92 of the ninth lens element L9 are both concave at the paraxial region O.

Specifically, other parameters of the optical lens 100 are given in table 1 below, taking as examples that the effective focal length f of the optical lens 100 is 6.969mm, the aperture value FNO of the optical lens 100 is 1.6, the half field angle HFOV of the optical lens 100 is 27 °, and the total length TTL of the optical lens 100 is 9 mm. The elements of the optical lens 100 from the object side to the image side along the optical axis O are arranged in the order of the elements from top to bottom in table 1. In the same lens, the surface with the smaller surface number is the object side surface of the lens, and the surface with the larger surface number is the image side surface of the lens, and for example, the surface numbers 2 and 3 correspond to the object side surface and the image side surface of the first lens L1, respectively. The radius Y in table 1 is the radius of curvature of the object-side surface or the image-side surface of the corresponding surface number at the optical axis O. The first value in the "thickness" parameter list of a lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image-side surface to the back surface of the lens on the optical axis O. The numerical value of the stop 102 in the "thickness" parameter column is the distance on the optical axis O from the stop 102 to the vertex of the next surface (the vertex refers to the intersection point of the surface and the optical axis O), the direction from the object side to the image side of the last lens of the first lens L1 is the positive direction of the optical axis O, when the value is negative, it indicates that the stop 102 is disposed on the right side of the vertex of the next surface, and if the thickness of the stop 102 is a positive value, the stop 102 is disposed on the left side of the vertex of the next surface. It is understood that the units of the radius Y, thickness, and focal length in table 1 are all mm. And the refractive index, Abbe number, and focal length in Table 1 were obtained at a reference wavelength of 587.6 nm.

In the first embodiment, the object-side surface and the image-side surface of any one of the first lens L1 through the ninth lens L9 are aspheric, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis O direction; c is the curvature at the optical axis O of the aspheric surface, c ═ 1/Y (i.e., paraxial curvature c is the inverse of the radius of curvature Y in table 1 above); k is a conic coefficient; ai is a correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the first embodiment.

TABLE 1

TABLE 2

Referring to fig. 2 (a), fig. 2 (a) shows a light spherical aberration curve of the optical lens 100 in the first embodiment at 468.1nm, 587.6nm and 656.3 nm. In fig. 2 (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. 2 (a), the spherical aberration value of the optical lens 100 in the first embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 2 (B), fig. 2 (B) is a diagram of astigmatism of light of the optical lens 100 in the first embodiment at a wavelength of 587.6 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent a meridional image plane 101 curvature T and a sagittal image plane 101 curvature S, and as can be seen from (B) in fig. 2, astigmatism of the optical lens 100 is well compensated at this wavelength.

Referring to fig. 2 (C), fig. 2 (C) is a distortion curve diagram of the optical lens 100 in the first embodiment at a wavelength of 587.6 nm. 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 (C) in fig. 2, the distortion of the optical lens 100 is well corrected at the wavelength 587.6 nm.

Second embodiment

A schematic structural diagram of an optical lens 100 disclosed in the second embodiment of the present application is shown in fig. 3, where the optical lens 100 includes a stop 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, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a filter 10, which are arranged in order from an object side to an image side along an optical axis O.

Specifically, other parameters of the optical lens 100 are given in table 3 below, taking as an example that the effective focal length f of the optical lens 100 is 6.2mm, the aperture value FNO of the optical lens 100 is 1.6, the half field angle HFOV of the optical lens 100 is 29.79 °, and the total length TTL of the optical lens 100 is 7.969 mm. The definitions of the parameters can be obtained from the description of the foregoing embodiments, and are not repeated herein. It is understood that the units of the radius Y, the thickness, and the focal length in table 3 are all mm, and the refractive index, the abbe number, and the focal length in table 3 are obtained at a reference wavelength of 587.6 nm.

In the second embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 to the ninth lens element L9 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the foregoing description of the embodiments, which is not repeated herein. Table 4 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the second embodiment.

TABLE 3

TABLE 4

Referring to fig. 4, as can be seen from the light spherical aberration diagram (a) in fig. 4, the light astigmatism diagram (B) in fig. 4, and the distortion diagram (C) in fig. 4, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 4 (a), fig. 4 (B), and fig. 4 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.

Third embodiment

A schematic structural diagram of an optical lens 100 disclosed in the third embodiment of the present application is shown in fig. 5, where the optical lens 100 includes a stop 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, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a filter 10, which are arranged in order from an object side to an image side along an optical axis O.

Further, the first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has negative refractive power, the fourth lens element L4 has positive refractive power, the fifth lens element L5 has negative refractive power, the sixth lens element L6 has positive refractive power, the seventh lens element L7 has positive refractive power, the eighth lens element L8 has negative refractive power, and the ninth lens element L9 has negative refractive power.

Specifically, other parameters of the optical lens 100 are given in table 5 below, taking as examples that the effective focal length f of the optical lens 100 is 6.636mm, the aperture value FNO of the optical lens 100 is 1.6, the half field angle HFOV of the optical lens 100 is 30 °, and the total length TTL of the optical lens 100 is 8.5 mm. The definitions of the parameters can be obtained from the description of the foregoing embodiments, and are not repeated herein. It is understood that the units of the radius Y, the thickness, and the focal length in table 5 are all mm, and the refractive index, the abbe number, and the focal length in table 5 are obtained at a reference wavelength of 587.6 nm.

In the third embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 to the ninth lens element L9 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 6 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the third embodiment.

TABLE 5

TABLE 6

Referring to fig. 6, as can be seen from the light spherical aberration diagram (a) in fig. 6, the light astigmatism diagram (B) in fig. 6, and the distortion diagram (C) in fig. 6, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 6 (a), fig. 6 (B), and fig. 6 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.

Fourth embodiment

A schematic structural diagram of an optical lens 100 disclosed in the fourth embodiment of the present application is shown in fig. 7, where the optical lens 100 includes a stop 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, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a filter 10, which are arranged in order from an object side to an image side along an optical axis O.

Further, the first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has negative refractive power, the fourth lens element L4 has positive refractive power, the fifth lens element L5 has positive refractive power, the sixth lens element L6 has positive refractive power, the seventh lens element L7 has positive refractive power, the eighth lens element L8 has negative refractive power, and the ninth lens element L9 has negative refractive power.

Further, the object-side surface 11 and the image-side surface 12 of the first lens element L1 are convex at the paraxial region O; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are respectively convex and concave at the paraxial region O; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are convex and concave, respectively, at a paraxial region O; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex and concave, respectively, at a paraxial region O; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are convex and concave, respectively, at a paraxial region O; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are concave and convex, respectively, at a paraxial region O; the object-side surface 71 and the image-side surface 72 of the seventh lens element L7 are convex at the paraxial region O; the object-side surface 81 and the image-side surface 82 of the eighth lens element L8 are concave and convex, respectively, at the paraxial region O; the object-side surface 91 and the image-side surface 92 of the ninth lens element L9 are both concave at the paraxial region O.

Specifically, other parameters of the optical lens 100 are given in table 7 below, taking as examples that the effective focal length f of the optical lens 100 is 6.565mm, the aperture value FNO of the optical lens 100 is 1.6, the half field angle HFOV of the optical lens 100 is 30.212 °, and the total length TTL of the optical lens 100 is 8.376 mm. The definitions of the parameters can be obtained from the description of the foregoing embodiments, and are not repeated herein. It is understood that the units of the radius Y, the thickness, and the focal length in table 7 are all mm, and the refractive index, the abbe number, and the focal length in table 7 are obtained at a reference wavelength of 587.6 nm.

In the fourth embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 to the ninth lens element L9 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 8 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the fourth embodiment.

TABLE 7

TABLE 8

Referring to fig. 8, as can be seen from the light spherical aberration diagram (a) in fig. 8, the light astigmatism diagram (B) in fig. 8, and the distortion diagram (C) in fig. 8, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 8 (a), fig. 8 (B), and fig. 8 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.

Fifth embodiment

A schematic structural diagram of an optical lens 100 disclosed in the fifth embodiment of the present application is shown in fig. 9, where the optical lens 100 includes a stop 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, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a filter 10, which are arranged in order from an object side to an image side along an optical axis O.

Further, the object-side surface 11 and the image-side surface 12 of the first lens element L1 are convex at the paraxial region O; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are both concave at the paraxial region O; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are convex and concave, respectively, at a paraxial region O; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex and concave, respectively, at a paraxial region O; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are convex and concave, respectively, at a paraxial region O; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are concave and convex, respectively, at a paraxial region O; the object-side surface 71 and the image-side surface 72 of the seventh lens element L7 are convex at the paraxial region O; the object-side surface 81 and the image-side surface 82 of the eighth lens element L8 are concave and convex, respectively, at the paraxial region O; the object-side surface 91 and the image-side surface 92 of the ninth lens element L9 are both concave at the paraxial region O.

Specifically, other parameters of the optical lens 100 are given in table 9 below, taking as examples that the effective focal length f of the optical lens 100 is 6.483mm, the aperture value FNO of the optical lens 100 is 1.6, the half field angle HFOV of the optical lens 100 is 30.498 °, and the total length TTL of the optical lens 100 is 8.365 mm. The definitions of the parameters can be obtained from the description of the foregoing embodiments, and are not repeated herein. It is understood that the units of the radius Y, the thickness, and the focal length in table 9 are all mm, and the refractive index, the abbe number, and the focal length in table 9 are obtained at a reference wavelength of 587.6 nm.

In the fifth embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 to the ninth lens element L9 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 10 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the fifth embodiment.

TABLE 9

Watch 10

Referring to fig. 10, as can be seen from the light spherical aberration diagram (a) in fig. 10, the light astigmatism diagram (B) in fig. 10, and the distortion diagram (C) in fig. 10, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 10 (a), fig. 10 (B), and fig. 10 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.

Sixth embodiment

A schematic structural diagram of an optical lens 100 disclosed in a sixth embodiment of the present application is shown in fig. 11, where the optical lens 100 includes a stop 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, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a filter 10, which are arranged in order from an object side to an image side along an optical axis O.

Further, the first lens element L1 has positive refractive power, the second lens element L2 has positive refractive power, the third lens element L3 has negative refractive power, the fourth lens element L4 has positive refractive power, the fifth lens element L5 has negative refractive power, the sixth lens element L6 has positive refractive power, the seventh lens element L7 has positive refractive power, the eighth lens element L8 has positive refractive power, and the ninth lens element L9 has negative refractive power.

Further, the object-side surface 11 and the image-side surface 12 of the first lens element L1 are convex and concave, respectively, at the paraxial region O; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are respectively convex and concave at the paraxial region O; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are convex and concave, respectively, at a paraxial region O; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex and concave, respectively, at a paraxial region O; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are convex and concave, respectively, at a paraxial region O; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are concave and convex, respectively, at a paraxial region O; the object-side surface 71 and the image-side surface 72 of the seventh lens element L7 are convex and concave, respectively, at a paraxial region O; the object-side surface 81 and the image-side surface 82 of the eighth lens element L8 are concave and convex, respectively, at the paraxial region O; the object-side surface 91 and the image-side surface 92 of the ninth lens element L9 are both concave at the paraxial region O.

Specifically, other parameters of the optical lens 100 are given in table 11 below, taking as examples that the effective focal length f of the optical lens 100 is 6.449mm, the aperture value FNO of the optical lens 100 is 1.6, the half field angle HFOV of the optical lens 100 is 31 °, and the total length TTL of the optical lens 100 is 8.197 mm. The definitions of the parameters can be obtained from the description of the foregoing embodiments, and are not repeated herein. It is understood that the units of the radius Y, the thickness, and the focal length in table 11 are all mm, and the refractive index, the abbe number, and the focal length in table 11 are obtained at a reference wavelength of 587.6 nm.

In the sixth embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 through the ninth lens element L9 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 12 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the sixth embodiment.

TABLE 11

TABLE 12

Referring to fig. 12, as can be seen from the light spherical aberration diagram (a) in fig. 12, the light astigmatism diagram (B) in fig. 12, and the distortion diagram (C) in fig. 12, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 12 (a), fig. 12 (B), and fig. 12 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.

Referring to table 13, table 13 summarizes ratios of the relations in the first embodiment to the sixth embodiment of the present application.

Watch 13

Relation/embodiment	First embodiment	Second embodiment	Third embodiment	Fourth embodiment	Fifth embodiment	Sixth embodiment
							0.5<SD11/ImgH<0.6	0.584	0.522	0.560	0.516	0.506	0.503
0.6<ET2/CT2<1.3	0.650	0.769	0.887	1.183	1.253	0.651
							2<\|f34/f5678\|<6	3.120	3.779	3.991	2.433	3.045	5.609
4<\|(R42+R41)/(R42-R41)\|<10	4.928	6.190	6.078	9.065	8.039	5.642
							0.8<f1/f<1.5	1.432	1.247	1.108	0.875	0.878	1.216
3mm<f/FNO<5mm	4.356mm	3.875mm	4.148mm	4.103mm	4.052mm	4.031mm
							2.5<FNO/tan(HFOV)<3.5	3.137	2.797	2.773	2.749	2.556	2.662
1.2<TTL/f<1.3	1.291	1.285	1.281	1.276	1.290	1.271

Referring to fig. 13, the present application further discloses a camera module 200, which includes an image sensor 201 and the optical lens 100 according to any of the first to sixth embodiments, wherein 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. And will not be described in detail herein. It can be understood that the image capturing module 200 having the optical lens 100 has all the technical effects of the optical lens 100, that is, the optical lens can satisfy the miniaturization design, and at the same time, can realize the large aperture, the large image plane and the long focal length characteristics, and can obtain the high-quality imaging effect. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they are not described herein again.

Referring to fig. 14, the present application further discloses an electronic device 300, wherein the electronic device 300 includes a housing 301 and the camera module 200, and the camera module 200 is 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, and the like. It can be understood that the electronic device 300 having the camera module 200 also has all the technical effects of the optical lens 100. That is, the optical lens can realize a large aperture, a large image plane, and a telephoto characteristic while satisfying a miniaturized design, and can obtain a high-quality imaging effect. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they are not described herein again.

The optical lens, the camera module and the electronic device disclosed in the embodiments of the present invention are described in detail above, and the principle and the embodiments of the present invention are explained in detail herein by applying specific examples, and the description of the embodiments above is only used to help understanding the optical lens, the camera module and the electronic device and the core ideas thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. An optical lens, characterized in that: the optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens which are arranged in sequence from an object side to an image side along an optical axis;

2. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

0.5<SD11/ImgH<0.6；

3. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

0.6<ET2/CT2<1.3；

ET2 is a distance between the maximum effective half aperture of the object-side surface of the second lens element and the maximum effective half aperture of the image-side surface of the second lens element along the optical axis, and CT2 is a thickness of the second lens element along the optical axis.

4. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

2<|f34/f5678|<6；

5. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

4<|(R42+R41)/(R42-R41)|<10；

6. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

0.8<f1/f<1.5；

7. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

3mm<f/FNO<5mm；

2.5<FNO/tan(HFOV)<3.5；

wherein f is an effective focal length of the optical lens, FNO is an f-number of the optical lens, HFOV is a half of a maximum field angle of the optical lens, and tan (HFOV) is a tangent value of HFOV.

8. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

1.2<TTL/f<1.3；

wherein, TTL is a distance from an object side surface of the first lens element to an image plane of the optical lens on the optical axis, and f is an effective focal length of the optical lens.

9. The utility model provides a module of making a video recording which characterized in that: the camera module comprises an image sensor and an optical lens according to any one of claims 1 to 8, wherein the image sensor is arranged on the image side of the optical lens.

10. An electronic device, characterized in that: the electronic device comprises a housing and the camera module of claim 9, the camera module being disposed on the housing.