CN113433661A

CN113433661A - Optical lens, camera module, electronic equipment and automobile

Info

Publication number: CN113433661A
Application number: CN202110740263.6A
Authority: CN
Inventors: 乐宇明; 蔡雄宇; 兰宾利; 赵迪
Original assignee: Tianjin OFilm Opto Electronics Co Ltd
Current assignee: Jiangxi Oufei Optics Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-09-24
Anticipated expiration: 2041-06-29
Also published as: CN113433661B

Abstract

The invention discloses an optical lens, a camera module, electronic equipment and an automobile, wherein the optical lens comprises the following components which are arranged along an optical axis from an object side to an image side in sequence: the first lens element with negative refractive power has a concave object-side surface and a concave image-side surface at a paraxial region, the second lens element with positive refractive power has a convex object-side surface and a convex image-side surface at a paraxial region, the third lens element with positive refractive power has a convex fourth lens element with positive refractive power, the fifth lens element with negative refractive power has a convex object-side surface and a convex image-side surface at a paraxial region, the sixth lens element with positive refractive power has a convex object-side surface and a concave image-side surface at a paraxial region, respectively, and the optical lens assembly satisfies the followings: f/EPD is more than or equal to 1.1 and less than or equal to 1.6, f is the effective focal length of the optical lens, and EPD is the entrance pupil diameter of the optical lens. The optical lens, the camera module, the electronic equipment and the automobile provided by the invention can realize miniaturization of the optical lens and high-quality imaging.

Description

Optical lens, camera module, electronic equipment and automobile

Technical Field

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

Background

With the development of science and technology, imaging devices are used in various fields (such as automobiles, security monitoring, medical treatment, electronic devices, and the like). With the wider application range, the requirements for the camera device are higher and higher, and the camera device not only needs to meet the development requirements of miniaturization, but also needs to realize high-quality imaging. However, in the trend of miniaturization of optical lenses, how to achieve a long-focus characteristic and a large aperture characteristic of the optical lens, and further achieve high-quality imaging of the optical lens is a technical problem to be solved.

Disclosure of Invention

The embodiment of the invention discloses an optical lens, a camera module, electronic equipment and an automobile, which can realize the characteristics of large aperture and long focal length of the optical lens while realizing the miniaturization and the lightness and the thinness of the optical lens so as to realize the high-quality imaging of the optical lens.

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

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

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

the third lens element with positive refractive power;

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

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

the optical lens satisfies the following relation:

1.1≤f/EPD≤1.6；

wherein f is an effective focal length of the optical lens, and EPD is an entrance pupil diameter of the optical lens.

In the optical lens provided by the application, when incident light passes through the first lens with negative refractive power, the object side surface and the image side surface of the first lens are both concave surface type designs at the position of a paraxial region, so that the incident light with a large angle with the paraxial region can enter the optical lens, and meanwhile, the incident light is effectively converged by the surface type design of the first lens, so that more light can enter the optical lens, the relative brightness can be improved, and the imaging quality of the optical lens is ensured; when incident light rays enter the second lens element, the second lens element provides positive refractive power for the optical lens element, and the object-side surface and the image-side surface of the second lens element are both convex at paraxial regions thereof, so that the incident light rays are further converged and smooth transition of the incident light rays is realized; the third lens and the fourth lens provide positive refractive power for the optical lens, so that central and marginal field light rays are further converged, the total length of the optical lens can be compressed, the optical lens is miniaturized, and by matching with the surface type design that the object side surface and the image side surface of the fourth lens are convex at the position near an optical axis, marginal field aberration generated by the first lens and the second lens can be effectively corrected, so that the imaging quality of the optical lens is improved; when incident light passes through the fifth lens element and the sixth lens element, the negative refractive power provided by the fifth lens element is opposite to the positive refractive power of the sixth lens element, so as to cancel out aberrations generated by each other, thereby improving the imaging quality of the optical lens assembly, meanwhile, the object-side surface and the image-side surface of the fifth lens element are both concave surfaces at the paraxial region, and the object-side surface and the image-side surface of the sixth lens element are respectively convex and concave surface designs at the paraxial region, it is possible to further balance the aberration generated by the front lens group (i.e. the first lens to the fourth lens) when converging the incident light which is difficult to correct, meanwhile, spherical aberration can be well inhibited, the imaging quality of the optical lens is improved, and the fifth lens and the sixth lens can further converge central field-of-view rays, so that the total length of the optical lens is compressed, and the miniaturization of the optical lens is realized. Further, the optical lens satisfies the relation: f/EPD is more than or equal to 1.1 and less than or equal to 1.6; wherein f is an effective focal length of the optical lens, and EPD is an entrance pupil diameter of the optical lens. Satisfying the above relational expression can make the optical lens obtain the characteristic of a large aperture under the condition of realizing the long-focus characteristic, can make more incident light enter the optical lens, and improve the relative brightness of the optical lens to obtain a clear and high-quality imaging effect.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens further includes a diaphragm, and the optical lens satisfies the following relation: EPL/DOS is more than 2.5 and less than 3.5;

the EPL is a distance from the diaphragm to an imaging surface of the optical lens on the optical axis, and the DOS is a distance from an object side surface of the first lens to the diaphragm on the optical axis.

Through with diaphragm to optical lens's image plane in distance on the optical axis with the object side of first lens extremely the diaphragm is in the above-mentioned within range of control, when will optical lens is applied to the module of making a video recording, can make incident light with the mode of being close vertical incidence, incide to the image sensor of the module of making a video recording on, make optical lens have telecentric feature to improve image sensor's sensitization sensitivity, and then realize optical lens's high-quality formation of image.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 7.5< f12/f36< 10;

wherein f12 is a combined focal length of the first and second lenses, and f36 is a combined focal length of the third, fourth, fifth, and sixth lenses.

By controlling the distribution ratio of the combined focal length of the first lens and the second lens to the combined focal length of the third lens, the fourth lens, the fifth lens and the sixth lens, the incident angle of incident light can be controlled, so that the high-order aberration of the optical lens is reduced, and the imaging quality of the optical lens is improved; meanwhile, when the above relational expression is satisfied, the emission angle of the chief ray passing through the sixth lens can be reduced, so that the chief ray is emitted to the image sensor at a more appropriate angle, the relative brightness of the optical lens can be improved, and the high-quality imaging of the optical lens is realized.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 2.5< f6/f < 4;

wherein f6 is the focal length of the sixth lens element, and f is the effective focal length of the optical lens.

The sixth lens provides positive refractive power for the optical lens, the chromatic aberration of the optical lens can be corrected by reasonably distributing the proportion of the focal length of the sixth lens to the effective focal length of the optical lens, the eccentricity sensitivity of the sixth lens is reduced, the aberration of the optical lens is corrected, the imaging resolution of the optical lens is further improved, and high-quality imaging of the optical lens is realized.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -4.2< f1/CT1< -2.5;

wherein f1 is the focal length of the first lens element, and CT1 is the thickness of the first lens element on the optical axis.

Because the first lens is closest to the object side, and the first lens is set to be a lens with negative refractive power, incident light rays which are emitted into the optical lens at a large angle can smoothly enter the optical lens, so that the field angle range of the optical lens is enlarged, and the imaging quality 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: -31< f45/(CT4-CT5) < -24.5;

wherein f45 is a combined focal length of the fourth lens element and the fifth lens element, CT4 is a thickness of the fourth lens element on the optical axis, and CT5 is a thickness of the fifth lens element on the optical axis.

The fourth lens element and the fifth lens element are cemented to form a cemented lens, and the cemented lens is formed by cementing two lens elements by adopting a cementing process, and has negative refractive power, so that the aberration of the optical lens can be corrected, and the imaging quality of the optical lens is improved. Meanwhile, the gluing state of the fourth lens and the fifth lens can reduce the eccentricity sensitivity, so that the assembly sensitivity of the optical lens is reduced, the problems of the lens manufacturing process and the assembly of the optical lens can be solved, the yield is improved, and the production cost is reduced. And through reasonably controlling the values of the combined focal length of the fourth lens and the fifth lens, the thickness of the fourth lens on the optical axis and the thickness of the fifth lens on the optical axis, the excessive thickness difference of the fourth lens and the fifth lens can be avoided, and the phenomenon that the fourth lens and the fifth lens are cracked or degummed due to the excessive difference of the cold deformation and the hot deformation caused by the excessive thickness difference of the lenses is prevented, so that the aberration correcting capability of the cemented lens is ensured, the imaging resolution of the optical lens is further improved, and the imaging quality of the optical lens is improved.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 10< | Rs3-Rs4|/d2< 12.5;

wherein Rs3 is a radius of curvature of the object-side surface of the second lens element on the optical axis, Rs4 is a radius of curvature of the image-side surface of the second lens element on the optical axis, and d2 is an air space between the second lens element and the third lens element on the optical axis.

Through right the object side of second lens in the curvature radius of optical axis department, the image side in the curvature radius of optical axis department, and to the second lens extremely the third lens in the relation between the air interval on the optical axis is retrained, can with the object side of second lens in the curvature radius of optical axis department and the image side in the curvature radius control of optical axis department is in reasonable range to prevent that ghost from producing, guarantee optical lens's formation of image quality, above-mentioned relational expression can realize simultaneously the second lens extremely the third lens in air interval on the optical axis carries out reasonable control, makes optical lens realizes the compactness of structure when realizing high-quality formation of image, and then realizes optical lens's miniaturization.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -7.5< CT1/Sags1< -2.5;

wherein CT1 is the thickness of the first lens on the optical axis, and Sags1 is the distance in the optical axis direction from the maximum effective aperture of the object-side surface of the first lens to the intersection point of the object-side surface of the first lens and the optical axis, i.e. the object-side surface rise of the first lens.

By controlling the ratio relation between the thickness of the first lens on the optical axis and the object side rise value of the first lens, the situation that the manufacturing difficulty of the lens is increased due to the fact that the thickness of the first lens is too large or the object side is too bent is avoided, and therefore production cost is reduced. Meanwhile, the bending degree of the object side surface of the first lens is controlled, so that the generation of edge aberration can be avoided, and the imaging quality 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: -5.1< CT3/Sags6< -3.1;

wherein CT3 is the thickness of the third lens element on the optical axis, and Sags6 is the distance from the maximum effective aperture of the image-side surface of the third lens element to the intersection point of the image-side surface of the third lens element and the optical axis in the optical axis direction, i.e. the image-side surface rise of the third lens element.

By controlling the ratio of the thickness of the third lens on the optical axis to the image side rise value of the third lens, the situation that the manufacturing difficulty of the lens is increased due to the fact that the thickness of the third lens is too large or the image side is too bent is avoided, and therefore production cost is reduced.

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 meet the requirement of miniaturization design, and can also realize the characteristics of a large aperture and a long focus and a high-quality imaging effect.

In a third aspect, the present invention discloses an electronic device, which includes a housing and the camera module set according to the second aspect, wherein the camera module set is disposed on the housing. The electronic equipment with the camera module can meet the requirement of miniaturization design, and can also realize the characteristics of a large aperture and a long focus and a high-quality imaging effect.

In a fourth aspect, the present invention discloses an automobile, which includes an automobile body and the camera module set according to the second aspect, wherein the camera module set is disposed on the automobile body to obtain image information. The automobile with the camera module can be beneficial to the acquisition of environmental information around the automobile body, provides a clear visual field for the driving of a driver, and provides guarantee for the safe driving of the driver.

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

according to the optical lens, the camera module, the electronic device and the automobile, the optical lens adopts six lenses with refractive power, when incident light passes through the first lens with negative refractive power, the incident light which forms a large angle with an optical axis can enter the optical lens by matching with the surface type design that the object side surface and the image side surface of the first lens are both concave surfaces at the position of a paraxial region, and meanwhile, the incident light can be effectively converged by the surface type design of the first lens, so that more light can enter the optical lens, the relative brightness can be improved, and the imaging quality of the optical lens can be ensured; when incident light rays enter the second lens element, the second lens element provides positive refractive power for the optical lens element, and the object-side surface and the image-side surface of the second lens element are both convex at paraxial regions thereof, so that the incident light rays are further converged and smooth transition of the incident light rays is realized; the third lens and the fourth lens provide positive refractive power for the optical lens, so that light rays of a central field and a marginal field are further converged, the total length of the optical lens can be compressed, and further the optical lens is miniaturized, and by matching with the design that the object side surface and the image side surface of the fourth lens are both convex surfaces at a paraxial region, marginal field aberration generated by the first lens and the second lens can be effectively corrected, so that the imaging quality of the optical lens is improved; when incident light passes through the fifth lens element and the sixth lens element, the negative refractive power provided by the fifth lens element is opposite to the positive refractive power of the sixth lens element, so as to cancel out aberrations generated by each other, thereby improving the imaging quality of the optical lens assembly. Further, the optical lens satisfies the relation: f/EPD is more than or equal to 1.1 and less than or equal to 1.6; where f is the effective focal length of the optical lens, and EPD is the entrance pupil diameter of the optical lens. Satisfying above-mentioned relational expression can make optical lens obtain the characteristic of big light ring under the circumstances that realizes the long focal property, can make more incident light enter into optical lens, promotes optical lens's relative luminance to obtain clear, high-quality imaging.

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 the camera module disclosed in the present application;

FIG. 12 is a schematic diagram of an electronic device disclosed herein;

fig. 13 is a schematic structural view of an automobile 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 and a sixth lens L6 disposed in order from an object side to an image side along an optical axis O; wherein the fourth lens L4 is cemented with the fifth lens L5 to form a cemented lens; during imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 in sequence from the object side of the first lens L1, and is finally imaged on the imaging surface 101 of the optical lens 100. The first lens element L1 with negative refractive power, the second lens element L2 with positive refractive power, the third lens element L3 with positive refractive power, the fourth lens element L4 with positive refractive power, the fifth lens element L5 with negative refractive power and the sixth lens element L6 with positive refractive power.

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

In consideration of the fact that the optical lens 100 is often used in electronic devices such as vehicle-mounted devices and driving recorders or in automobiles and is used as a camera on an automobile body, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 may all be glass lenses, so that the optical lens 100 may have good optical effects and may have reduced temperature sensitivity, and each lens may be spherical or aspherical.

In addition, it is understood that, in other embodiments, when the optical lens assembly 100 is applied to an electronic device such as a smart phone or a smart tablet, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 may also be made of plastic, and each lens may be spherical or aspheric.

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 second lens L2 and the third lens L3. For example, the stop 102 may be disposed between the image-side surface 22 of the second lens L2 and the object-side surface 31 of the third lens L3. It is understood that, in other embodiments, the stop 102 may be disposed between other lenses or between the object side of the optical lens 100 and the object side 11 of the first lens L1, and the setting is adjusted according to practical situations, which is not limited in this embodiment.

In some embodiments, the optical lens 100 further includes an infrared filter 70, and the infrared filter 70 is disposed between the sixth lens L6 and the image plane 101 of the optical lens 100. The infrared filter 70 is selected for filtering infrared light, so that the imaging quality is improved, and the imaging more conforms to the visual experience of human eyes. It is understood that the infrared filter 70 may be made of an optical glass coating, a colored glass, or an infrared filter 70 made of other materials, which may be selected according to actual needs, and is not specifically limited in this embodiment.

Optionally, in order to improve the imaging quality, the optical lens 100 further includes a protective glass 80, the protective glass 80 is disposed between the infrared filter 70 and the imaging surface 101 of the optical lens 100, and the protective glass 80 is used for protecting the optical lens 100. It is understood that in other embodiments, the protection glass 80 may be disposed between other lenses, and the disposition is adjusted according to the actual situation, which is not specifically limited in this embodiment.

In some embodiments, the optical lens 100 satisfies the following relationship: f/EPD is more than or equal to 1.1 and less than or equal to 1.6;

where f is the effective focal length of the optical lens 100, and EPD is the entrance pupil diameter of the optical lens 100. Satisfying the above relation can make the optical lens 100 obtain the characteristic of a large aperture under the condition of realizing the telephoto characteristic, so that more incident light rays can enter the optical lens 100, and the relative brightness of the optical lens 100 is improved to obtain a clear and high-quality imaging effect.

In some embodiments, the optical lens 100 satisfies the following relationship: EPL/DOS is more than 2.5 and less than 3.5;

the EPL is a distance between the stop 102 and the image plane 101 of the optical lens 100 on the optical axis O, and a distance between the object-side surface 11 of the DOS first lens L1 and the stop 102 on the optical axis O. By controlling the ratio of the distance from the diaphragm 102 to the image plane 101 of the optical lens 100 on the optical axis O to the distance from the object-side surface 11 of the first lens L1 to the diaphragm 102 on the optical axis O to be within the above range, when the optical lens 100 is applied to a camera module, incident light can be incident on an image sensor of the camera module in a manner close to vertical incidence, so that the optical lens 100 has a telecentric feature, the photosensitivity of the image sensor is improved, and high-quality imaging of the optical lens 100 is realized. When the ratio exceeds the upper limit, the distance between the diaphragm 102 and the imaging surface 101 of the optical lens 100 is too small, and the angle of the incident light beam incident on the image sensor is not reasonable, which affects the imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 7.5< f12/f36< 10;

where f12 is a combined focal length of the first lens L1 and the second lens L2, and f36 is a combined focal length of the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6. By controlling the distribution ratio of the combined focal length of the first lens L1 and the second lens L2 to the combined focal length of the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6, the incident angle of incident light rays can be controlled to reduce the high-order aberration of the optical lens 100, thereby improving the imaging quality of the optical lens 100; meanwhile, when the above relational expression is satisfied, the emission angle of the principal ray passing through the sixth lens L6 can be reduced, so that the principal ray is incident on the image sensor at a more appropriate angle, the relative brightness of the optical lens 100 can be improved, and high-quality imaging of the optical lens 100 can be realized.

In some embodiments, the optical lens 100 satisfies the following relationship: 2.5< f6/f < 4;

where f6 is the focal length of the sixth lens element L6, and f is the effective focal length of the optical lens system 100. The sixth lens element L6 provides positive refractive power for the optical lens 100, and by reasonably allocating the ratio of the focal length of the sixth lens element L6 to the effective focal length of the optical lens 100, the chromatic aberration of the optical lens 100 can be corrected, and the decentering sensitivity of the sixth lens element L6 can be reduced, so as to correct the aberration of the optical lens 100, thereby improving the imaging resolution of the optical lens 100 and realizing high-quality imaging of the optical lens 100. When the ratio thereof exceeds the upper limit, the ability of the optical lens 100 to correct aberrations decreases, resulting in a decrease in the imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: -4.2< f1/CT1< -2.5;

wherein f1 is the focal length of the first lens element L1, and CT1 is the thickness of the first lens element L1 on the optical axis O. Since the first lens element L1 is closest to the object side, and the first lens element L1 is a lens element with negative refractive power, the incident light beams that are incident into the optical lens 100 at a large angle can smoothly enter, and the field angle range of the optical lens 100 is enlarged, thereby ensuring the imaging quality of the optical lens 100. When the ratio exceeds the upper limit, the focal length of the first lens element L1 is too large, and the refractive power is too strong, so that the imaging plane 101 of the optical lens system 100 becomes more sensitive due to the change of the first lens element L1, and thus larger aberrations are generated; when the ratio is lower than the lower limit, the refractive power of the first lens element L1 is insufficient, which is not favorable for the incident light with a large angle to enter the optical lens 100, and thus prevents the wide angle and miniaturization of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: -31< f45/(CT4-CT5) < -24.5;

wherein f45 is a combined focal length of the fourth lens element L4 and the fifth lens element L5, CT4 is a thickness of the fourth lens element L4 on the optical axis O, and CT5 is a thickness of the fifth lens element L5 on the optical axis O. The fourth lens element L4 is cemented with the fifth lens element L5 to form a cemented lens, and since the fourth lens element L4 and the fifth lens element L5 are cemented together to form a cemented lens, the cemented lens has negative refractive power, so that the aberration of the optical lens 100 can be corrected, and the imaging quality of the optical lens 100 can be improved. Meanwhile, the gluing state of the fourth lens L4 and the fifth lens L5 can reduce the eccentricity sensitivity, thereby reducing the assembly sensitivity of the optical lens 100, solving the problems of the lens manufacturing process and the assembly of the optical lens 100, improving the yield and reducing the production cost. By reasonably controlling the combined focal length of the fourth lens L4 and the fifth lens L5, the thickness of the fourth lens L4 on the optical axis O, and the thickness of the fifth lens L5 on the optical axis O, the excessive difference in thickness between the fourth lens L4 and the fifth lens L5 can be avoided, and the phenomenon of glue crack or glue failure of the fourth lens L4 and the fifth lens L5 due to the excessive difference in the amount of cold and heat deformation caused by the excessive difference in the thickness of the lenses can be prevented, so as to ensure the capability of correcting the aberration of the cemented lens, further improve the imaging resolution of the optical lens 100, and improve the imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 10< | Rs3-Rs4|/d2< 12.5;

wherein Rs3 is a curvature radius of the object-side surface 21 of the second lens element L2 along the optical axis O, Rs4 is a curvature radius of the image-side surface 22 of the second lens element L2 along the optical axis O, and d2 is an air space between the second lens element L2 and the third lens element L3 along the optical axis O. By constraining the relationship between the curvature radius of the object-side surface 21 of the second lens element L2 at the optical axis O, the curvature radius of the image-side surface 22 at the optical axis O, and the air space between the second lens element L2 and the third lens element L3 at the optical axis O, the curvature radius of the object-side surface 21 of the second lens element L2 at the optical axis O and the curvature radius of the image-side surface 22 at the optical axis O can be controlled within a reasonable range, so as to prevent the occurrence of ghost images and ensure the imaging quality of the optical lens 100, and the air space between the second lens element L2 and the third lens element L3 at the optical axis O can be reasonably controlled by the above relational expression, so that the optical lens 100 realizes high-quality imaging, compactness of the structure, and further miniaturization of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: -7.5< CT1/Sags1< -2.5;

wherein CT1 is the thickness of the first lens element L1 on the optical axis O, and Sags1 is the distance from the maximum effective aperture of the object-side surface 11 of the first lens element L1 to the intersection point of the object-side surface 11 of the first lens element L1 and the optical axis O in the direction of the optical axis O, that is, the rise of the object-side surface 11 of the first lens element L1. By controlling the ratio of the thickness of the first lens element L1 on the optical axis O to the rise of the object-side surface 11 of the first lens element L1, the problem that the difficulty of manufacturing the lens is increased due to the fact that the thickness of the first lens element L1 is too large or the object-side surface 11 of the first lens element L1 is too curved is avoided, and therefore production cost is reduced. Meanwhile, the control of the curvature degree of the object-side surface 11 of the first lens L1 can avoid the generation of edge aberration, and ensure the imaging quality of the optical lens 100. When the ratio exceeds the upper limit, the object-side surface 11 of the first lens element L1 is too curved, which tends to cause edge aberration and degrades the imaging quality of the optical lens assembly 100. Meanwhile, the lens surface is excessively curved, which increases the difficulty of processing the lens and increases the production cost of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: -5.1< CT3/Sags6< -3.1;

here, CT3 is the thickness of the third lens L3 on the optical axis O, and Sags6 is the distance from the maximum effective aperture of the image-side surface 32 of the third lens L3 to the intersection point of the image-side surface 32 of the third lens L3 and the optical axis O in the direction of the optical axis O, that is, the rise of the image-side surface 32 of the third lens L3. By controlling the ratio of the thickness of the third lens element L3 on the optical axis O to the rise of the image-side surface 32 of the third lens element L3, the situation that the thickness of the third lens element L3 is too large or the image-side surface 32 of the third lens element L3 is too curved, which increases the difficulty of manufacturing the lens is avoided, thereby achieving a reduction in production cost.

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

First embodiment

As shown in fig. 1, an optical lens 100 disclosed in the first embodiment of the present application includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an infrared filter 70, and a protective glass 80, which are sequentially disposed from an object side to an image side along an optical axis O. For refractive power and material of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5 and the sixth lens element L6, reference may be made to the above detailed description, which is not repeated herein.

Further, the object-side surface 11 of the first lens element L1 is concave at the paraxial region O, and the image-side surface 12 of the first lens element L1 is concave at the paraxial region O; the object-side surface 21 of the second lens element L2 is convex at the paraxial region O, and the image-side surface 22 of the second lens element L2 is convex 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 convex 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 convex at the paraxial region O; the object-side surface 51 of the fifth lens element L5 is concave 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 convex at the paraxial region O, and the image-side surface 62 of the sixth lens element L6 is concave at the paraxial region O.

Specifically, taking the effective focal length f of the optical lens 100 as 15.8mm, the aperture value FNO of the optical lens 100 as 1.1, and the field angle FOV of the optical lens 100 as 33.1 ° as an example, other parameters of the optical lens 100 are given in table 1 below. 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 1 and 2 correspond to the object side surface and the image side surface of the first lens L1, respectively. The Y radius in table 1 is the radius of curvature of the object-side surface or the image-side surface of the corresponding surface number at the optical axis. The first value in the "thickness" parameter set of a lens is the thickness of the lens on the optical axis, and the second value is the distance from the image-side surface to the back surface of the lens on the optical axis. The numerical value of the diaphragm in the thickness parameter column is the distance from the diaphragm to the vertex of the next surface (the vertex refers to the intersection point of the surface and the optical axis) on the optical axis, the direction from the object side surface of the first lens to the image side surface of the last lens is the positive direction of the optical axis by default, when the value is negative, the diaphragm is arranged on the right side of the vertex of the next surface, and if the thickness of the diaphragm is a positive value, the diaphragm is arranged 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 and Abbe number in Table 1 were obtained at a reference wavelength of 587.6nm, and the focal length was obtained at a reference wavelength of 555 nm.

In the first embodiment, the second lens L2 to the fifth lens L5 are all spherical lenses, and the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 are both aspheric surfaces, 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 of the aspheric surface, c ═ 1/Y (i.e., paraxial curvature c is the inverse of 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. 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 660nm, 610nm, 555nm, 510nm, and 455 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 555 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 the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 2 that the 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 555 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 a wavelength of 555 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 first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an infrared filter 70, and a protective glass 80, which are sequentially disposed from an object side to an image side along an optical axis O. For refractive power and material of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5 and the sixth lens element L6, reference may be made to the above detailed description, which is not repeated herein.

Specifically, taking the effective focal length f of the optical lens 100 as 15.95mm, the aperture value FNO of the optical lens 100 as 1.2, and the field angle FOV of the optical lens 100 as 32.7 ° as an example, other parameters of the optical lens 100 are given in table 3 below. 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, thickness, and focal length in table 3 are all mm. And the refractive index and Abbe number in Table 3 were obtained at a reference wavelength of 587.6nm, and the focal length was obtained at a reference wavelength of 555 nm.

In the second embodiment, the second lens element L2 to the fifth lens element L5 are all spherical lens elements, and the object-side surface and the image-side surface of the first lens element L1 and the sixth lens element L6 are all aspheric surfaces, and the method for calculating the surface shape x of each aspheric lens element can be obtained by using the description of the foregoing 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 (a), fig. 4 (a) shows a light spherical aberration curve of the optical lens 100 in the second embodiment at 660nm, 610nm, 555nm, 510nm, and 455 nm. In fig. 4 (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 (a) in fig. 4, the spherical aberration value of the optical lens 100 in the second embodiment is better, which illustrates that the imaging quality of the optical lens 100 in the present embodiment is better.

Referring to fig. 4 (B), fig. 4 (B) is a diagram of astigmatism of light of the optical lens 100 in the second embodiment at a wavelength of 555 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 the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 4 that astigmatism of the optical lens 100 is well compensated at this wavelength.

Referring to fig. 4 (C), fig. 4 (C) is a distortion curve diagram of the optical lens 100 in the second embodiment at a wavelength of 555 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. 4, the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.

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 first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an infrared filter 70, and a protective glass 80, which are sequentially disposed from an object side to an image side along an optical axis O. For refractive power and material of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5 and the sixth lens element L6, reference may be made to the above detailed description, which is not repeated herein.

Specifically, taking the effective focal length f of the optical lens 100 as 15.68mm, the aperture value FNO of the optical lens 100 as 1.3, and the field angle FOV of the optical lens 100 as 33.4 ° as an example, other parameters of the optical lens 100 are given in table 5 below. 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, thickness, and focal length in table 5 are mm. And the refractive index, Abbe number in Table 5 were obtained at a reference wavelength of 587.6nm, and the focal length was obtained at a reference wavelength of 555 nm.

In the third embodiment, the second lens element L2 to the fifth lens element L5 are all spherical lens elements, and the object-side surface and the image-side surface of the first lens element L1 and the sixth lens element L6 are all aspheric surfaces, and the method for calculating the surface shape x of each aspheric lens element can be obtained by using 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 (a), fig. 6 (a) shows a light spherical aberration curve of the optical lens 100 in the third embodiment at 660nm, 610nm, 555nm, 510nm, and 455 nm. In fig. 6 (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 (a) in fig. 6, the spherical aberration value of the optical lens 100 in the third embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 6 (B), fig. 6 (B) is a diagram of astigmatism of light of the optical lens 100 in the third embodiment at a wavelength of 555 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 the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 6 that astigmatism of the optical lens 100 is well compensated at this wavelength.

Referring to fig. 6 (C), fig. 6 (C) is a distortion curve diagram of the optical lens 100 in the third embodiment at a wavelength of 555 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. 6, the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.

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 first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an infrared filter 70, and a protective glass 80, which are sequentially disposed from an object side to an image side along an optical axis O. For refractive power and material of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5 and the sixth lens element L6, reference may be made to the above detailed description, which is not repeated herein.

Specifically, taking the effective focal length f of the optical lens 100 as 15.73mm, the aperture value FNO of the optical lens 100 as 1.4, and the field angle FOV of the optical lens 100 as 33.3 ° as an example, other parameters of the optical lens 100 are given in table 7 below. 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, thickness, and focal length in table 7 are mm. And the refractive index, Abbe number in Table 7 were obtained at a reference wavelength of 587.6nm, and the focal length was obtained at a reference wavelength of 555 nm.

In the fourth embodiment, the second lens element L2 to the fifth lens element L5 are all spherical lens elements, and the object-side surface and the image-side surface of the first lens element L1 and the sixth lens element L6 are all aspheric surfaces, and the method for calculating the surface shape x of each aspheric lens element can be obtained by using 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 (a), fig. 8 (a) shows a light spherical aberration curve of the optical lens 100 in the fourth embodiment at 660nm, 610nm, 555nm, 510nm, and 455 nm. In fig. 8 (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 (a) in fig. 8, the spherical aberration value of the optical lens 100 in the fourth embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 8 (B), fig. 8 (B) is a diagram of astigmatism of light of the optical lens 100 in the fourth embodiment at a wavelength of 555 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 the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 8 that astigmatism of the optical lens 100 is well compensated at this wavelength.

Referring to fig. 8 (C), fig. 8 (C) is a distortion curve diagram of the optical lens 100 in the fourth embodiment at a wavelength of 555 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. 8, the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.

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 first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an infrared filter 70, and a protective glass 80, which are sequentially disposed from an object side to an image side along an optical axis O. For refractive power and material of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5 and the sixth lens element L6, reference may be made to the above detailed description, which is not repeated herein.

Specifically, taking the effective focal length f of the optical lens 100 as 15.76mm, the aperture value FNO of the optical lens 100 as 1.6, and the field angle FOV of the optical lens 100 as 33.4 ° as an example, other parameters of the optical lens 100 are given in table 9 below. 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, thickness, and focal length in table 9 are mm. And the refractive index, Abbe number in Table 9 were obtained at a reference wavelength of 587.6nm, and the focal length was obtained at a reference wavelength of 555 nm.

In the fifth embodiment, the second lens element L2 to the fifth lens element L5 are all spherical lens elements, and the object-side surface and the image-side surface of the first lens element L1 and the sixth lens element L6 are all aspheric surfaces, and the method for calculating the surface shape x of each aspheric lens element can be obtained by using 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 (a), fig. 10 (a) shows a light spherical aberration curve of the optical lens 100 in the fifth embodiment at 660nm, 610nm, 555nm, 510nm, and 455 nm. In fig. 10 (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 (a) in fig. 10, the spherical aberration value of the optical lens 100 in the fifth embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 10 (B), fig. 10 (B) is a diagram of astigmatism of light of the optical lens 100 in the fifth embodiment at a wavelength of 555 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 the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 10 that astigmatism of the optical lens 100 is well compensated at this wavelength.

Referring to fig. 10 (C), fig. 10 (C) is a distortion curve diagram of the optical lens 100 in the fifth embodiment at a wavelength of 555 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. 10, the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.

Referring to table 11, table 11 summarizes ratios of the relations in the first embodiment to the fifth embodiment of the present application.

TABLE 11

Relation/embodiment	First embodiment	Second embodiment	Third embodiment	Fourth embodiment	Fifth embodiment
						1.1≤f/EPD≤1.6	1.140	1.200	1.300	1.400	1.600
2.5＜EPL/DOS＜3.5	3.204	3.172	3.097	3.094	2.739
						7.5<f12/f36<10	9.909	9.385	8.977	8.658	7.970
2.5<f6/f<4	2.731	3.239	2.830	2.898	3.759
						-4.2<f1/CT1<-2.5	-4.141	-3.890	-3.717	-3.524	-2.775
-31<f45/(CT4-CT5)<-24.5	-27.226	-30.878	-27.729	-24.950	-25.276
						10<\|Rs3-Rs4\|/d2<12.5	12.202	11.886	12.112	11.715	10.227
-7.5<CT1/Sags1<-2.5	-2.591	-3.009	-3.647	-4.519	-7.244
						-5.1<CT3/Sags6<-3.1	-4.196	-3.292	-4.128	-4.171	-5.055

Referring to fig. 11, 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 fifth 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, which is not described herein again. It can be understood that the image capturing module 200 having the optical lens 100 can achieve the characteristics of a large aperture and a long focal length and a high-quality image forming effect while satisfying the miniaturization design. 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. 12, 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 not limited to, a mobile phone, a tablet computer, a notebook computer, a smart watch, a monitor, a car recorder, a car backing image, 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. In other words, the characteristics of a large aperture and a long focal length and a high-quality imaging effect can be achieved while satisfying the miniaturization design. 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. 13, the present application further discloses an automobile 400, wherein the automobile 400 includes an automobile body 401 and the camera module 200, and the camera module 200 is disposed on the automobile body 401 to obtain image information. It can be understood that the automobile 400 having the camera module 200 also has all the technical effects of the optical lens 100. The automobile with the camera module can be beneficial to acquiring environmental information around the automobile body, provides a clear visual field for the driving of a driver, and provides guarantee for the safe driving of the driver. 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, the electronic device and the automobile disclosed by the embodiment of the invention are described in detail, a specific example is applied in the description to explain the principle and the embodiment of the invention, and the description of the embodiment is only used for helping to understand the optical lens, the camera module, the electronic device and the automobile and the core idea 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 includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are arranged in order from an object side to an image side along an optical axis;

the third lens element with positive refractive power;

the optical lens satisfies the following relation:

1.1≤f/EPD≤1.6；

2. An optical lens according to claim 1, characterized in that: the optical lens further comprises a diaphragm, and the optical lens satisfies the following relational expression:

2.5＜EPL/DOS＜3.5；

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

7.5<f12/f36<10；

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

2.5<f6/f<4；

wherein f6 is the focal length of the sixth lens.

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

-4.2<f1/CT1<-2.5；

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

-31<f45/(CT4-CT5)<-24.5；

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

10<|Rs3-Rs4|/d2<12.5；

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

-7.5<CT1/Sags1<-2.5；

wherein CT1 is the thickness of the first lens element on the optical axis, and Sags1 is the distance from the maximum effective aperture of the object-side surface of the first lens element to the intersection point of the object-side surface of the first lens element and the optical axis in the optical axis direction.

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

-5.1<CT3/Sags6<-3.1；

wherein CT3 is the thickness of the third lens element on the optical axis, and Sags6 is the distance from the maximum effective aperture of the image-side surface of the third lens element to the intersection point of the image-side surface of the third lens element and the optical axis in the optical axis direction.

10. 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 9, wherein the image sensor is arranged on the image side of the optical lens.

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

12. An automobile, characterized in that: the vehicle comprises a vehicle body and the camera module set according to claim 10, wherein the camera module set is arranged on the vehicle body to acquire image information.