CN113625425B

CN113625425B - Optical lens, camera module and electronic equipment

Info

Publication number: CN113625425B
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: 2023-07-04
Anticipated expiration: 2041-07-23
Also published as: CN113625425A

Abstract

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

Description

Optical lens, camera module and electronic equipment

Technical Field

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

Background

With the development of technology, the demands for miniaturization of optical lenses and high-quality imaging quality are increasing. Among various electronic devices, the use of light, thin, short, and large aperture optical lenses, such as cellular phones, tablet computers, telephone watches, and the like, has become a popular trend. However, in the current market, the photographing imaging quality of the portable large aperture lens such as four-lens, five-lens and six-lens is not good enough, and the requirement of the user on the imaging quality of the lens cannot be met.

Disclosure of Invention

The embodiment of the invention discloses an optical lens, an imaging 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 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 disposed in order from an object side to an image side along an optical axis;

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

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

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

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

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

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

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

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

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 provided in this embodiment of the present disclosure, 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 good light-converging capability can be achieved, thereby ensuring imaging quality of the optical lens element, and meanwhile, the head aperture of the optical lens element can be reduced, thereby meeting the miniaturization design requirement of the optical lens element; the concave surface design of the image side surface of the second lens at the paraxial region can further shorten the head length of the optical lens so as to save the assembly space; by matching the third lens element with negative refractive power and the fourth lens element with positive refractive power, partial aberrations generated by the third lens element and the fourth lens element can be mutually offset by the opposite refractive powers of the third lens element and the fourth lens element, so that the third lens element and the fourth lens element can contribute less aberration ratio in the optical lens element, and the planar designs of the third lens element and the fourth lens element are convex at the paraxial region and concave at the paraxial region, so as to reduce the shape difference of the third lens element and the fourth lens element and improve the assembly consistency and yield of the optical lens element; 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 rays emitted from the lens element (i.e., the first lens element to the fourth lens element) and to inject the light rays into the ninth lens element more stably, so that the sensitivity of the light path change of the light rays to the influence of imaging quality is reduced; finally, the ninth lens element with negative refractive power is combined to allow the light incident on the ninth lens element to be emitted at a more appropriate angle so as to expand the field of view of the optical lens element, and the object-side surface and the image-side surface of the ninth lens element are concave at a paraxial region, so that the total length of the optical lens element is further shortened, and aberration generated from the first lens element to the eighth lens element can be corrected, thereby realizing high-quality imaging of the optical lens element.

As an alternative implementation manner, 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 half of the maximum effective aperture of the object side surface of the first lens, 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 are reasonably configured, so as to reduce the radial dimension of the first lens, thereby reducing the head dimension of the optical lens, saving the assembly space, and realizing smooth assembly of the optical lens.

As an alternative implementation manner, 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 the distance from the maximum effective half-caliber of the object side surface of the second lens to the maximum effective half-caliber of the image side surface of the second lens in the optical axis direction, that is, the edge thickness of the second lens, and CT2 is the thickness of the second lens on the optical axis, that is, the center thickness of the second lens.

The ratio of the edge thickness to the center thickness of the lens can influence the molding yield of the lens and the convergence capacity of the lens to light rays, so that the ratio of the effective caliber edge thickness to the center thickness of the second lens is controlled within the range, 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 is corrected, and the imaging stability of the optical lens is further realized.

As an alternative implementation manner, 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 and 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, risks of total internal reflection of the light rays can be reduced, the transmission efficiency of the light rays is improved, and the sensitization level and the imaging quality of the optical lens are further improved.

As an alternative implementation manner, 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 the object side surface of the fourth lens element at the optical axis, and R42 is a radius of curvature of the image side surface of the fourth lens element at the optical axis.

When the relation is satisfied, the relation between the radius of curvature of the object side surface of the fourth lens element at the optical axis and the radius of curvature of the image side surface of the fourth lens element 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 element are not excessively curved, the situation that the lens surfaces are excessively complex and difficult to process and manufacture is avoided, and the yield of the lens is improved; in addition, the fourth lens can correct astigmatism and aberration, and meanwhile performance change sensitivity of the optical lens can be reduced, and imaging stability of the optical lens is guaranteed.

As an alternative implementation manner, 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, the focal length of the first lens and the effective focal length of the optical lens are reasonably controlled, so that incident light rays can be ensured to be better converged on the imaging surface of the optical lens, and meanwhile, the first lens is easy to process and manufacture, and the lens processing difficulty is reduced.

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

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 be made to have a long focal length characteristic while satisfying miniaturization, and simultaneously a large aperture can be made to have a sufficient light flux at the time of photographing, so that the optical lens can obtain an imaging effect of high image quality and high definition.

As an alternative implementation manner, 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 the f-number of the optical lens, HFOV is half the maximum field angle of the optical lens, and tan (HFOV) is the tangent of HFOV.

Since the f-number of the optical lens may affect the light entering amount of the optical lens, the maximum field angle of the optical lens may affect the imaging range of the optical lens, and when the imaging range of the optical lens is too large and the light entering amount is insufficient, the imaging quality of the optical lens may be degraded. Therefore, when the optical lens meets the above relation, 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, thereby enhancing the weak light shooting capability and the close-up effect of the optical lens, realizing clear shooting of distant scenes and presenting a clearer shooting effect.

As an alternative implementation manner, 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 the distance from the object side surface of the first lens element to the imaging surface of the optical lens element on the optical axis, i.e. the total length of the optical lens element, and f is the effective focal length of the optical lens element.

Because the total length of the optical lens is an important parameter in the miniaturized design of the optical lens, and the effective focal length of the optical lens has a large influence on imaging quality, the relationship between the total length of the optical lens and the effective focal length of the optical lens is reasonably allocated, so that the optical lens can obtain a longer focal length while the miniaturization is realized, and the optical lens can shoot distant sceneries and present high-quality imaging when meeting the miniaturized design requirement.

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

In a third aspect, the invention also discloses an electronic device, which comprises a housing and the camera module set in the second aspect, wherein the camera module set is arranged in the housing.

The electronic equipment with the camera module can effectively improve 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 equipment 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 a paraxial region, so that good light converging capacity 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 concave surface design of the image side surface of the second lens 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 combined, partial aberration generated by the third lens element and partial aberration generated by the fourth lens element can be offset by the opposite refractive powers of the third lens element and the fourth lens element, so that the third lens element and the fourth lens element can contribute less aberration ratio in the optical lens element, and meanwhile, the surface designs of the third lens element and the fourth lens element are convex at the paraxial region and concave at the image side region, so that the shape difference of the third lens element and the fourth lens element can be reduced, and the assembly consistency and yield of the optical lens element can be improved; the refractive power distribution and the surface type design of the fifth lens to the eighth lens enable the fifth lens to the eighth lens to better receive the light rays emitted from the lens groups (namely the first lens to the fourth lens) and simultaneously enable the light rays to be more stably emitted into the ninth lens, so that the sensitivity of the light path change of the light rays to the influence of imaging quality is reduced; finally, the ninth lens element with negative refractive power is combined to make the light incident on the ninth lens element emit at a more appropriate angle so as to expand the field of view of the optical lens element, and the object-side surface and the image-side surface of the ninth lens element are concave at the paraxial region, so that the total length of the optical lens element is further shortened, and meanwhile, the aberration generated by the first lens element to the eighth lens element can be corrected so as to realize high-quality imaging of the optical lens element.

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

fig. 2 is a light ray spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of an optical lens disclosed in the first embodiment of the present application;

FIG. 3 is a schematic view of an optical lens disclosed in a second embodiment of the present application;

fig. 4 is a light ray spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of an optical lens disclosed in the second embodiment of the present application;

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

fig. 6 is a light ray spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of an optical lens disclosed in the third embodiment of the present application;

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

Fig. 8 is a light ray spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of an optical lens disclosed in the fourth embodiment of the present application;

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

fig. 10 is a light ray spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of an optical lens disclosed in the fifth embodiment of the present application;

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

fig. 12 is a light ray spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of an optical lens disclosed in the sixth embodiment of the present application;

FIG. 13 is a schematic view of the structure of the camera module disclosed in the present application;

fig. 14 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 invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

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 invention will be further described with reference to the examples 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 sequentially disposed from an object side to an image side along an optical axis O. In imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8 and the ninth lens L9 in order from the object side of the first lens L1 and finally forms an image on the imaging surface 101 of the optical lens 100. The first lens element L1 with positive refractive power, the second lens element L2 with positive or negative refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with positive or negative refractive power, the fifth lens element L5 with positive or negative refractive power, the sixth lens element L6 with positive or negative refractive power, the seventh lens element L7 with positive or negative refractive power, the eighth lens element L8 with positive or negative refractive power, and the ninth lens element L9 with 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 a 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 a 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 a 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 a 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 a 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 a 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 may be glass lenses, so that the optical lens 100 has a good optical effect and can reduce the temperature sensitivity.

Alternatively, the materials of 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 plastic, so that the optical lens 100 is light and thin and easy to process the complex surfaces of the lenses.

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 will be appreciated that in other embodiments, the diaphragm 102 may be disposed between other lenses, for example, between the image side 12 of the first lens element L1 and the object side 21 of the second lens element L2, and the arrangement may be specifically adjusted according to practical situations, and the embodiment is not limited thereto.

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

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

here, 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, so as 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 realizing smooth assembly of the optical lens 100. When the ratio is lower than the lower limit, the difference of the head and tail dimensions 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 head size of the optical lens 100 is too large, so that the opening is too large when the electronic device with the optical lens 100 is mounted with the optical lens 100, the aesthetic design of the electronic device is affected, and the practicability of the optical lens 100 is further reduced.

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

ET2 is the distance from the maximum effective half-caliber of the object side surface 21 of the second lens element L2 to the maximum effective half-caliber of the image side surface 22 of the second lens element L2 in the direction of the optical axis O, i.e., the edge thickness of the second lens element L2, and CT2 is the thickness of the second lens element L2 on the optical axis O, i.e., the center thickness of the second lens element L2. The ratio of the edge thickness to the center thickness of the lens can affect the molding yield of the lens and the convergence capability of the lens to light, so that the ratio of the effective caliber edge thickness to the center thickness of the second lens L2 is controlled within the range, the molding yield of the second lens L2 can be ensured, and meanwhile, the optical path difference of the optical lens 100 can be effectively balanced, so that the curvature of field of the optical lens 100 can be corrected, and the imaging stability of the optical lens 100 can be further realized. When the ratio thereof is below the lower limit, the center thickness of the second lens L2 is too thick with respect to the edge thickness, resulting in an excessive 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 is reduced.

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

wherein 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 lengths of the third lens L3 and the fourth lens L4 and the combined focal lengths 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 incident into the optical lens 100 can be stably transmitted, the risk of total internal reflection of the light can be reduced, the transmission efficiency of the light can be improved, and the light sensing level and the imaging quality of the optical lens 100 can be further 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 at the optical axis O, and R42 is a radius of curvature of the image side surface 42 of the fourth lens element L4 at the optical axis O. When the above relation is satisfied, the relationship between the radius of curvature of the object-side surface 41 of the fourth lens element L4 at the optical axis O and the radius of curvature of the image-side surface 42 of the fourth lens element L4 at the optical axis O can be reasonably configured, so that the surface shapes of the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are not excessively curved, and the situation of difficult processing and manufacturing due to excessively complex lens surfaces is avoided, thereby improving the yield of the lens element; in addition, satisfying the above relation can reduce the sensitivity of performance variation of the optical lens 100 while correcting astigmatism and aberration of the fourth lens L4, and ensure 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 L1, and f is the effective focal length of the optical lens 100. Because the first lens L1 is the lens closest to the object side in the optical lens 100, reasonably controlling the focal length of the first lens L1 and the effective focal length of the optical lens 100 can ensure that incident light can better converge on the imaging surface 101 of the optical lens 100, and meanwhile, the first lens L1 is easy to process and manufacture, and the lens processing difficulty is reduced. When the ratio is lower than the lower limit, the focal length of the first lens L1 is too small, so that the light collecting capability of the first lens L1 is reduced, and the light passing amount of the optical lens 100 is reduced, resulting in reduced imaging quality; when the ratio is higher than the upper limit, the effective focal length of the optical lens 100 is too small, resulting in too short an optical length, increasing the sensitivity of the optical lens 100, and simultaneously deteriorating the converging effect of light rays on the imaging surface 101 of the optical lens 100, thereby resulting in a decrease in the imaging quality of the optical lens 100.

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

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 be made to obtain the tele characteristic while satisfying miniaturization, while the large aperture can be made to obtain a sufficient amount of light passing through the optical lens 100 at the time of photographing, so that the optical lens 100 can achieve an imaging effect of high image quality and high definition. When the ratio is lower than the lower limit, the aperture ratio of the optical lens 100 is too large, so that the aperture is too small, the light incoming quantity is insufficient, the shooting effect of the optical lens 100 in the dark environment is reduced, and the effective focal length of the optical lens 100 is small, so that the optical lens 100 cannot shoot a distant scene; when the ratio exceeds the upper limit, too small an f-number of the optical lens 100 causes an excessively large aperture, so that the difficulty in designing and manufacturing the optical lens 100 increases, and the effective focal length of the optical lens 100 is too long to expand the shooting field of view.

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

where FNO is the f-number of the optical lens 100, HFOV is half the maximum field angle of the optical lens 100, and tan (HFOV) is the tangent of HFOV. Since the f-number of the optical lens 100 affects the light entering amount of the optical lens 100, the maximum angle of view 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 entering amount is insufficient, the imaging quality of the optical lens 100 is degraded. Therefore, when the optical lens 100 satisfies the above relation, the optical lens 100 may obtain a proper f-number and a maximum angle of view range, so as to balance the relation between the light incoming amount and the imaging range of the optical lens 100, and further enhance the weak light shooting capability and the close-up effect of the optical lens 100, and at the same time, may achieve clear shooting of distant scenes, and exhibit a clearer shooting effect.

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

wherein TTL is the distance from the object side surface 11 of the first lens element L1 to the imaging surface 101 of the optical lens assembly 100 on the optical axis O, i.e. the total length of the optical lens assembly 100, and f is the effective focal length of the optical lens assembly 100. Because the total length of the optical lens 100 is an important parameter in the miniaturized design of the optical lens 100, and the effective focal length of the optical lens 100 has a large influence on the imaging quality, by reasonably adjusting the relationship between the total length of the optical lens 100 and the effective focal length of the optical lens 100, the optical lens 100 can obtain a longer focal length while achieving miniaturization, so that when the miniaturized design requirement of the optical lens 100 is met, remote sceneries 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 angle of view of the optical lens 100, and a wider scene is difficult to shoot; 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 take a clear photograph of a distant scene.

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. 1, a schematic structural diagram of an optical lens 100 according to a first embodiment of the present application, 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 an optical filter 10, which are sequentially disposed from an object side to an image side along an optical axis O.

Further, the first lens element L1 with positive refractive power, the second lens element L2 with positive refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with positive refractive power, the fifth lens element L5 with negative refractive power, the sixth lens element L6 with positive refractive power, the seventh lens element L7 with positive refractive power, the eighth lens element L8 with negative refractive power, and the ninth lens element L9 with 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 at the paraxial region O; 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 O; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are convex and concave at the paraxial region O; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex and concave 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 at a paraxial region O; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are respectively concave and convex at the 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 at the paraxial region O; the object-side surface 91 and the image-side surface 92 of the ninth lens element L9 are concave at the paraxial region O.

Specifically, taking the effective focal length f= 6.969mm of the optical lens 100, the aperture value fno=1.6 of the optical lens 100, the half field angle hfov=27° of the optical lens 100, and the total length ttl=9 mm of the optical lens 100 as an example, other parameters of the optical lens 100 are given in table 1 below. The elements from the object side to the image side are sequentially arranged in the order of the elements from top to bottom in table 1 along the optical axis O of the optical lens 100. 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, and the surface numbers 2 and 3 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 O. The first value in the "thickness" parameter array of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image side surface of the lens to the latter surface on the optical axis O. The value of the diaphragm 102 in the "thickness" parameter row is the distance between the diaphragm 102 and the vertex of the subsequent surface (the vertex refers to the intersection point of the surface and the optical axis O) on the optical axis O, 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 O by default, when the value is negative, it indicates that the diaphragm 102 is disposed on the right side of the vertex of the subsequent surface, and when the thickness of the diaphragm 102 is positive, the diaphragm 102 is on the left 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 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 to the ninth lens L9 are aspherical, and the surface profile 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 O direction; c is the curvature of the aspherical surface at the optical axis O, 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 the correction coefficient of the i-th order of the aspherical surface. The higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each of the aspherical mirrors in the first embodiment are given in Table 2 below.

TABLE 1

TABLE 2

Referring to fig. 2 (a), fig. 2 (a) shows the optical spherical aberration diagram of the optical lens 100 in the first embodiment at the wavelengths of 468.1nm, 587.6nm and 656.3 nm. In fig. 2 (a), the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. As can be seen from fig. 2 (a), the optical lens 100 in the first embodiment has a better spherical aberration value, which indicates that the optical lens 100 in the present embodiment has a better imaging quality.

Referring to fig. 2 (B), fig. 2 (B) is a light astigmatism diagram of the optical lens 100 at a wavelength of 587.6nm 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. The astigmatism curves represent the meridional imaging plane 101 curvature T and the sagittal imaging plane 101 curvature S, and it can be seen from fig. 2 (B) that at this wavelength, the astigmatism of the optical lens 100 is well compensated.

Referring to fig. 2 (C), fig. 2 (C) is a graph showing a distortion curve of the optical lens 100 at a wavelength of 587.6nm 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. 2 (C), the distortion of the optical lens 100 becomes well corrected at the wavelength of 587.6 nm.

Second embodiment

As shown in fig. 3, a schematic structural diagram of an optical lens 100 according to a second embodiment of the present application, 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 an optical filter 10, which are sequentially disposed from an object side to an image side along an optical axis O.

Specifically, taking the effective focal length f=6.2 mm of the optical lens 100, the aperture value fno=1.6 of the optical lens 100, the half field angle hfov= 29.79 of the optical lens 100, and the total length ttl= 7.969mm of the optical lens 100 as examples, other parameters of the optical lens 100 are given in table 3 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. It is understood that the units of the Y radius, thickness, and focal length in table 3 are all mm, and the refractive index, abbe number, and 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 element can be obtained by the above description of the embodiments, which is not repeated here. The higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each of the aspherical mirrors in the second embodiment are given in Table 4 below.

TABLE 3 Table 3

TABLE 4 Table 4

Referring to fig. 4, as can be seen from the graph of (a) optical spherical aberration in fig. 4, the graph of (B) optical spherical aberration in fig. 4, and the graph of (C) distortion 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, regarding the wavelengths corresponding to the curves in fig. 4 (a), fig. 4 (B), and fig. 4 (C), reference may be made to what is described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C), and the description thereof will not be repeated here.

Third embodiment

As shown in fig. 5, a schematic structural diagram of an optical lens 100 according to a third embodiment of the present application, 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 an optical filter 10, which are sequentially disposed from an object side to an image side along an optical axis O.

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

Specifically, taking the effective focal length f= 6.636mm of the optical lens 100, the aperture value fno=1.6 of the optical lens 100, the half field angle hfov=30° of the optical lens 100, and the total length ttl=8.5 mm of the optical lens 100 as an example, other parameters of the optical lens 100 are given in table 5 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. It is understood that the units of the Y radius, thickness, and focal length in table 5 are all mm, and the refractive index, abbe number, and 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 element can be obtained by the above description of the embodiments, which is not repeated here. The higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each of the aspherical mirrors in the third embodiment are given in Table 6 below.

TABLE 5

TABLE 6

Referring to fig. 6, as can be seen from the graph of (a) optical spherical aberration in fig. 6, the graph of (B) optical spherical aberration in fig. 6, and the graph of (C) distortion 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, regarding the wavelengths corresponding to the curves in fig. 6 (a), 6 (B), and 6 (C), reference may be made to what is described in the first embodiment with respect to fig. 2 (a), 2 (B), and 2 (C), and the description thereof will be omitted here.

Fourth embodiment

As shown in fig. 7, a schematic structural diagram of an optical lens 100 according to a fourth embodiment of the present application, 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 an optical filter 10, which are sequentially disposed from an object side to an image side along an optical axis O.

Further, the first lens element L1 with positive refractive power, the second lens element L2 with negative refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with positive refractive power, the fifth lens element L5 with positive refractive power, the sixth lens element L6 with positive refractive power, the seventh lens element L7 with positive refractive power, the eighth lens element L8 with negative refractive power, and the ninth lens element L9 with 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 convex and concave at a paraxial region O; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are convex and concave at the paraxial region O; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex and concave 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 at a paraxial region O; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are respectively concave and convex at the 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 at the paraxial region O; the object-side surface 91 and the image-side surface 92 of the ninth lens element L9 are concave at the paraxial region O.

Specifically, taking the effective focal length f= 6.565mm of the optical lens 100, the aperture value fno=1.6 of the optical lens 100, the half field angle hfov= 30.212 of the optical lens 100, and the total length ttl= 8.376mm of the optical lens 100 as examples, other 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. It is understood that the units of the Y radius, thickness, and focal length in table 7 are all mm, and the refractive index, abbe number, and 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 element can be obtained by the above description of the embodiments, which is not repeated herein. The higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each of the aspherical mirrors in the fourth embodiment are given in Table 8 below.

TABLE 7

TABLE 8

Referring to fig. 8, as can be seen from the (a) light spherical aberration graph in fig. 8, the (B) light astigmatic graph in fig. 8, and the (C) distortion graph 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 the embodiment has good imaging quality. In addition, regarding the wavelengths corresponding to the curves in fig. 8 (a), 8 (B), and 8 (C), reference may be made to what is described in the first embodiment with respect to fig. 2 (a), 2 (B), and 2 (C), and the description thereof will be omitted here.

Fifth embodiment

As shown in fig. 9, a schematic structural diagram of an optical lens 100 according to a fifth embodiment of the present application, 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 an optical filter 10, which are sequentially disposed 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 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 at the paraxial region O; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex and concave 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 at a paraxial region O; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are respectively concave and convex at the 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 at the paraxial region O; the object-side surface 91 and the image-side surface 92 of the ninth lens element L9 are concave at the paraxial region O.

Specifically, taking the effective focal length f= 6.483mm of the optical lens 100, the aperture value fno=1.6 of the optical lens 100, the half field angle hfov= 30.498 of the optical lens 100, and the total length ttl= 8.365mm of the optical lens 100 as examples, other parameters of the optical lens 100 are given in table 9 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. It is understood that the units of the Y radius, thickness, and focal length in Table 9 are all mm, and the refractive index, abbe number, and 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 element can be obtained by the above description of the embodiments, which is not repeated herein. The following table 10 gives the higher order coefficients A4, A6, A8, a10, a12, a14, a16, a18 and a20 that can be used for each aspherical mirror in the fifth embodiment.

TABLE 9

Table 10

Referring to fig. 10, as can be seen from the graph of (a) optical spherical aberration in fig. 10, the graph of (B) optical spherical aberration in fig. 10, and the graph of (C) distortion 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, regarding the wavelengths corresponding to the curves in fig. 10 (a), 10 (B), and 10 (C), reference may be made to what is described in the first embodiment with respect to fig. 2 (a), 2 (B), and 2 (C), and the description thereof will be omitted here.

Sixth embodiment

As shown in fig. 11, a schematic structural diagram of an optical lens 100 according to a sixth embodiment of the present application, 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 an optical filter 10, which are sequentially disposed from an object side to an image side along an optical axis O.

Further, the first lens element L1 with positive refractive power, the second lens element L2 with positive refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with positive refractive power, the fifth lens element L5 with negative refractive power, the sixth lens element L6 with positive refractive power, the seventh lens element L7 with positive refractive power, the eighth lens element L8 with positive refractive power, and the ninth lens element L9 with 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 at the paraxial region O; 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 O; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are convex and concave at the paraxial region O; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex and concave 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 at a paraxial region O; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are respectively concave and convex at the paraxial region O; the object-side surface 71 and the image-side surface 72 of the seventh lens element L7 are convex and concave 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 at the paraxial region O; the object-side surface 91 and the image-side surface 92 of the ninth lens element L9 are concave at the paraxial region O.

Specifically, taking the effective focal length f= 6.449mm of the optical lens 100, the aperture value fno=1.6 of the optical lens 100, the half field angle hfov=31° of the optical lens 100, and the total length ttl= 8.197mm of the optical lens 100 as an example, other parameters of the optical lens 100 are given in table 11 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. It is understood that the units of the Y radius, thickness, and focal length in table 11 are all mm, and the refractive index, abbe number, and 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 to the ninth lens element L9 are aspheric, and the method for calculating the surface shape x of each aspheric lens element can be obtained by the above description of the embodiments, and will not be repeated here. The following table 12 gives the higher order coefficients A4, A6, A8, a10, a12, a14, a16, a18 and a20 that can be used for each aspherical mirror in the sixth embodiment.

TABLE 11

Table 12

Referring to fig. 12, as can be seen from the graph of (a) optical spherical aberration in fig. 12, the graph of (B) optical spherical aberration in fig. 12, and the graph of (C) distortion 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, regarding the wavelengths corresponding to the curves in fig. 12 (a), 12 (B), and 12 (C), reference may be made to what is described in the first embodiment with respect to fig. 2 (a), 2 (B), and 2 (C), and the description thereof will be omitted here.

Referring to table 13, table 13 is a summary of the ratios of the relationships in the first embodiment to the sixth embodiment of the present application.

TABLE 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 an image capturing module 200, which includes an image sensor 201 and the optical lens 100 according to any one 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 here. It can be appreciated that the image capturing module 200 with the optical lens 100 has all the technical effects of the optical lens 100, that is, the optical lens can achieve the characteristics of large aperture, large image plane and long focal length while meeting the miniaturization design, and can obtain the high-quality imaging effect. 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. 14, the present 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 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 optical lens can realize large aperture, large image plane and long focal length characteristics while meeting the miniaturization design, and can obtain high-quality imaging effect. 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: the optical lens comprises nine lenses with refractive power, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens are sequentially arranged from an object side to an image side along an optical axis;

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

the optical lens satisfies the following relation:

0.8<f1/f<1.5；

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

0.5<SD11/ImgH<0.6；

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

0.6<ET2/CT2<1.3；

wherein ET2 is the distance from the maximum effective half-caliber of the object side surface of the second lens to the maximum effective half-caliber of the image side surface of the second lens in the optical axis direction, and CT2 is the thickness of the second lens on the optical axis.

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

2<|f34/f5678|<6；

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

4<|(R42+R41)/(R42-R41)|<10；

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

3mm<f/FNO<5mm；

2.5<FNO/tan(HFOV)<3.5；

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

7. The optical lens of claim 1, wherein: 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 imaging surface of the optical lens element on the optical axis, and f is an effective focal length of the optical lens element.

8. A camera module, its characterized in that: the camera module comprises an image sensor and the optical lens as claimed in any one of claims 1 to 7, wherein the image sensor is arranged on the image side of the optical lens.

9. An electronic device, characterized in that: the electronic equipment comprises a shell and the camera module set according to claim 8, wherein the camera module set is arranged on the shell.