CN113933960A

CN113933960A - Optical lens, camera module, electronic equipment and automobile

Info

Publication number: CN113933960A
Application number: CN202111143046.5A
Authority: CN
Inventors: 乐宇明; 兰宾利; 朱志鹏
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-01-14
Anticipated expiration: 2041-09-28
Also published as: CN113933960B

Abstract

The invention discloses an optical lens, a camera module, electronic equipment and an automobile, wherein the optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from an object side to an image side along an optical axis, the first lens, the second lens and the third lens all have negative refractive power, the fourth lens and the fifth lens all have positive refractive power, the sixth lens has negative refractive power, the seventh lens has positive refractive power, and the optical lens meets the following relational expression: 120deg/mm < FOV/f < 145 deg/mm; wherein, FOV is the maximum field angle of the optical lens, and f is the effective focal length of the optical lens. By controlling the ratio of the angle of view to the focal length, a larger angle of view can be obtained, and thus a larger monitoring area can be obtained when the optical lens is applied to an automobile.

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

In recent years, with the increasing national requirements for road traffic safety and automobile safety, in the related art, blind spot monitoring is mainly performed by installing an optical lens, so that the driving safety of an automobile is improved.

However, the field angle of the vehicle-mounted optical lens in the related art is small, resulting in a small monitoring area.

Disclosure of Invention

The embodiment of the invention discloses an optical lens, a camera module, electronic equipment and an automobile.

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

the first lens element with negative refractive power has a convex object-side surface at a paraxial region thereof and a concave image-side surface at a paraxial region thereof; the second lens element with negative refractive power has a convex object-side surface at paraxial region and a concave image-side surface at paraxial region; the third lens element with negative refractive power has a concave object-side surface 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 thereof and a concave image-side surface at a paraxial region thereof; the fifth lens element with positive refractive power has a convex object-side surface and a convex image-side surface at a paraxial region; the sixth lens element with negative refractive power has a concave object-side surface and a concave image-side surface at a paraxial region; the seventh lens element with positive refractive power has a convex object-side surface and a convex image-side surface at paraxial region; the optical lens satisfies the following relation: 120deg/mm < FOV/f < 145 deg/mm; wherein FOV is the maximum field angle of the optical lens, and f is the effective focal length of the optical lens.

The first lens element with negative refractive power has convex and concave object-side and image-side surfaces, thereby facilitating collection of light rays with larger angle incident on the first lens element and increasing the field angle of the optical lens. The second lens element with negative refractive power has a convex object-side surface and a concave image-side surface, so that light rays with larger angles passing through the first lens element can reasonably enter the second lens element, and accordingly reduction of edge aberration and ghost risk are facilitated. By setting the third lens element to have positive refractive power, light rays with a larger angle passing through the first lens element and the second lens element can be effectively converged, thereby facilitating reduction of field curvature and astigmatism of the optical lens. By arranging the fourth lens element with positive refractive power, the object-side surface and the image-side surface of the fourth lens element are respectively convex and concave, so that light rays emitted from the fourth lens element can be converged, and the total length of the optical lens can be reduced. By setting the fifth lens element with negative refractive power, the image-side surface and the object-side surface of the fifth lens element are both convex, which is beneficial to increasing the light incident quantity of the subsequent lens elements, increasing the relative illumination and improving the brightness. The object side surface and the image side surface of the sixth lens are both concave surfaces, so that chromatic aberration and processing sensitivity of the optical lens are reduced. The seventh lens element with positive refractive power is favorable for controlling the angle of light entering the imaging plane, so that the main light angle required by the optical lens design is realized. In addition, the optical lens can obtain a larger angle of view by controlling the ratio of the angle of view to the focal length, so that the optical lens can have a larger monitoring area when applied to automobiles. In addition, by controlling the ratio of the field angle to the focal length, the optical lens can have a smaller deflection angle of emergent light, and the problem of the edge dark angle of the optical lens is relieved.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 11deg/mm < | CRA/SAGs72| < 23 deg/mm; the CRA is a chief ray incidence angle of the optical lens, and the SAGs72 is a distance in the optical axis direction from a maximum effective aperture of the image-side surface of the seventh lens to an intersection point of the image-side surface of the seventh lens and the optical axis, that is, a rise of the image-side surface of the seventh lens. Through the proportion of the chief ray incident angle of control optical lens and the rise of the image side of seventh lens, thereby the face type of the image side of seventh lens is effectively controlled, make the image side of seventh lens can not too crooked, ghost risk is lower, be favorable to reducing the angle that light penetrated into the imaging surface simultaneously, when this optical lens was applied to the module of making a video recording, can be with less angle take in the sensitization chip of the module of making a video recording, be favorable to improving the sensitization performance of the module of making a video recording.

As an alternative embodiment, in an embodiment of the first aspect of the invention, 4< Rs11/SAGs11< 6; wherein Rs11 is a curvature radius of the object-side surface of the first lens at the optical axis, and sag 11 is a 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, that is, a rise of the object-side surface of the first lens. The ratio of the curvature radius of the object side surface of the first lens and the rise of the object side surface of the first lens is controlled, so that negative refractive power is provided for the first lens, the maximum effective aperture of the object side surface of the first lens is favorably controlled, incident light rays with larger angles are favorably collected to enter the optical lens, the field angle of the optical lens is increased, and when the optical lens is applied to automobiles, a larger monitoring range can be realized.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the fifth lens and the sixth lens are cemented to form a cemented lens, and the optical lens satisfies the following relation: 12< f56/f < 21; wherein f56 is a combined focal length of the fifth lens and the sixth lens. The fifth lens element and the sixth lens element are cemented to form a cemented lens, the fifth lens element has positive refractive power, and the sixth lens element has negative refractive power, thereby reducing chromatic aberration of the optical lens and correcting spherical aberration of the optical lens, and further improving resolution of the optical lens. In addition, the proportion of the combined focal length of the fifth lens and the sixth lens and the focal length of the optical lens is reasonably controlled, so that the fifth lens and the sixth lens of the optical lens are favorably controlled to converge light rays, the light rays with large field angles are smoothly transited, the resolving power is favorably improved, and the imaging quality is improved.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.6< CT7/BFL < 1.3; wherein CT7 is the thickness of the seventh lens element on the optical axis, and BFL is the distance from the image-side surface of the seventh lens element to the image plane of the optical lens system on the optical axis. The ratio of the thickness of the seventh lens on the optical axis to the distance from the image side surface of the seventh lens to the imaging surface of the optical lens on the optical axis is controlled, so that the thickness of the seventh lens on the optical axis and the position of the imaging surface from the seventh lens can be reasonably controlled, the structure compactness of the optical lens is improved, the miniaturization of the optical lens is realized, and when the optical lens is applied to a camera module, the optical lens is more matched with a photosensitive chip of the camera module, and the eccentricity sensitivity of the seventh lens is lower.

As an alternative embodiment, in an embodiment of the first aspect of the invention, 4.5 < SD21/CT 2< 5.5; wherein SD21 is the maximum effective half aperture of the object-side surface of the second lens, and CT2 is the thickness of the second lens on the optical axis. The ratio of the maximum effective half aperture of the object side surface of the second lens to the thickness of the second lens on the optical axis is controlled, so that the size of the maximum effective half aperture of the object side surface of the second lens can be effectively controlled, and meanwhile, the size of the optical lens can be compressed to a greater extent by matching with the thickness of the smaller second lens on the optical axis, the total length of the optical lens is reduced, the miniaturization of the optical lens is facilitated, and the ghost risk can be reduced.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -7< Rs31/CT3< 10; wherein Rs31 is a radius of curvature of an object-side surface of the third lens element at an optical axis, and CT3 is a thickness of the third lens element at the optical axis. The curvature degree of the third lens is favorably controlled by controlling the ratio of the curvature radius of the object side surface of the third lens to the thickness of the third lens on the optical axis, so that the thickness of the third lens on the optical axis is smaller, the risk of generating ghost images can be reduced, meanwhile, the edge aberration of the optical lens is favorably corrected, and the generation of astigmatism is inhibited.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: TTL/AT2 is more than 6 and less than 8; wherein TTL is a distance on the optical axis from the object-side surface of the first lens element to the image plane of the optical lens, and AT2 is an air distance on the optical axis from the object-side surface of the second lens element to the object-side surface of the third lens element. Through controlling the ratio of the total length of the optical lens to the air distance between the object side surface of the second lens and the object side surface of the third lens on the optical axis, the situation that the air distance between the second lens and the third lens is too large and the sensitivity of the optical lens is increased can be avoided, so that the tolerance of the second lens and the third lens is conveniently controlled, and the production difficulty and the production cost are favorably reduced.

In a second aspect, the present invention discloses a camera module, which includes a photosensitive chip and the optical lens according to the first aspect, wherein the photosensitive chip is disposed on an image side of the optical lens. The image pickup module having the optical lens of the first aspect has all the technical effects of the optical lens of the first aspect, that is, the optical lens can obtain a larger angle of view by controlling the ratio of the angle of view to the focal length, so that when the optical lens is applied to an automobile, a larger monitoring area can be obtained. In addition, by controlling the ratio of the field angle to the focal length, the optical lens can have a smaller deflection angle of emergent light, and the problem of the edge dark angle of the optical lens is relieved.

In a third aspect, the present invention discloses an electronic device, which includes the camera module set of the second aspect of the housing, and the camera module set is disposed on the housing. The electronic device having the camera module according to the second aspect also has all the technical effects of the optical lens according to the first aspect. Namely, the optical lens of the electronic device has a larger angle of view, so that when the optical lens is applied to a vehicle, a larger monitoring area can be provided, and in addition, the deflection angle of emergent light is smaller, so that the problem of the edge dark angle of the optical lens is relieved.

The automobile is characterized by comprising an automobile body and the camera module in the second aspect, wherein the camera module is arranged on the automobile body to acquire image information. The automobile with the electronic device having the camera module of the second aspect also has all the technical effects of the optical lens, that is, the automobile has a larger angle of view and a larger monitoring area.

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

by adopting the optical lens, the camera module, the electronic device and the automobile provided by the embodiment, the first lens is set to have negative refractive power, and the object side surface and the image side surface of the first lens are respectively convex and concave, so that light rays emitted into the first lens at a larger angle can be collected, and the field angle of the optical lens can be increased. The second lens element with negative refractive power has a convex object-side surface and a concave image-side surface, so that light rays with larger angles passing through the first lens element can reasonably enter the second lens element, and accordingly reduction of edge aberration and ghost risk are facilitated. By setting the third lens element with positive refractive power, light rays with a larger angle emitted from the first lens element and the second lens element can be effectively converged, thereby facilitating reduction of field curvature and astigmatism of the optical lens. By arranging the fourth lens element with positive refractive power, the object-side surface of the fourth lens element is convex, and the image-side surface of the fourth lens element is concave, so that light rays emitted from the fourth lens element can be converged, and the total length of the optical lens assembly can be reduced. By setting the fifth lens element with negative refractive power, the image-side surface and the object-side surface of the fifth lens element are both convex, which is beneficial to increasing the light incident quantity of the light rays of the subsequent lens elements, increasing the relative illumination and improving the brightness. The object side surface and the image side surface of the sixth lens are both concave surfaces, so that chromatic aberration and processing sensitivity of the optical lens are reduced. The seventh lens element with positive refractive power is favorable for controlling the angle of light entering the imaging plane, so that the main light angle required by the optical lens design is realized. The optical lens can obtain a larger angle of view by controlling the ratio of the angle of view to the focal length, so that the optical lens can have a larger monitoring area when applied to automobiles. In addition, by controlling the ratio of the field angle to the focal length, the optical lens can have a smaller deflection angle of emergent light, and the problem of the edge dark angle of the optical lens is relieved.

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 the present application;

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

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

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

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

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

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

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

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

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

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

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

fig. 13 is a schematic structural diagram of an optical lens disclosed in a seventh embodiment of the present application;

fig. 14 is a ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 15 is a schematic structural diagram of an optical lens disclosed in an eighth embodiment of the present application;

fig. 16 is a ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 17 is a schematic structural view of an optical lens disclosed in a ninth embodiment of the present application;

fig. 18 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 19 is a schematic structural diagram of an optical lens disclosed in the tenth embodiment of the present application;

FIG. 20 is a spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%)

Fig. 21 is a schematic structural diagram of the camera module disclosed in the present application;

FIG. 22 is a schematic structural diagram of an electronic device disclosed herein;

fig. 23 is a block diagram of the structure of the automobile disclosed in the present application.

Detailed Description

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, fig. 1 is a schematic structural diagram of an optical lens 100 disclosed in the present application, and shows optical paths of a paraxial ray λ 1 and an edge ray λ 2. The application discloses an optical lens 100, and the optical lens 100 comprises a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 which are arranged in sequence from an object side to an image side along an optical axis o. During imaging, light rays enter the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 in sequence from the object side surface S1 of the first lens L1, and are finally imaged on the imaging surface 101 of the optical lens 100. The first lens element L1, the second lens element L2 and the third lens element L3 all have negative refractive power, the fourth lens element L4 and the fifth lens element L5 have positive refractive power, the sixth lens element L6 has negative refractive power, and the seventh lens element L7 has positive refractive power.

Further, the object-side surface S1 of the first lens element L1 is convex at the paraxial region o, the image-side surface S2 of the first lens element L1 is concave at the paraxial region o, the object-side surface S3 of the second lens element L2 is convex at the paraxial region o, the image-side surface S4 of the second lens element L2 is concave at the paraxial region o, the object-side surface S5 and the image-side surface S6 of the third lens element L3 are both concave at the paraxial region o, the object-side surface S7 of the fourth lens element L4 is convex at the paraxial region o, the image-side surface S8 of the fourth lens element L4 is concave at the paraxial region o, the object-side surface S5 and the image-side surface S12 of the sixth lens element L6 are both convex at the paraxial region o, and the object-side surface S28 and the image-side surface S599 of the seventh lens element L5 are both convex at the paraxial region o.

By providing the first lens element L1 with negative refractive power, the object-side surface S1 and the image-side surface S2 are respectively convex and concave, so as to collect light rays incident on the first lens element L1 at a larger angle, thereby increasing the field of view of the optical lens system 100. The second lens element L2 with negative refractive power has a convex object-side surface S3 and a concave image-side surface S4, so that light rays with a large angle passing through the first lens element L1 can reasonably enter the second lens element L2, which is beneficial to reducing edge aberration and reducing ghost image risk. By setting the third lens element L3 with positive refractive power, light rays with a larger angle emitted from the first lens element L1 and the second lens element L2 can be effectively converged, thereby facilitating reduction of curvature of field and astigmatism of the optical lens 100. By providing the fourth lens element L4 with positive refractive power, the object-side surface S7 is convex and the image-side surface S8 is concave, so that the light rays exiting the fourth lens element L4 can be focused to reduce the total length of the optical lens system 100. By providing the fifth lens element L5 with negative refractive power, the image-side surface S10 and the object-side surface thereof are both convex, which is beneficial to increasing the light incident quantity of the light rays of the subsequent lens elements, increasing the relative illumination and improving the brightness. By providing the sixth lens element L6 with both the object-side surface S11 and the image-side surface S12 being concave, it is beneficial to reduce chromatic aberration and process sensitivity of the optical lens system 100. The seventh lens element L7 with positive refractive power is beneficial to controlling the angle of the light entering the image plane 101, so as to realize the chief ray angle required by the design of the optical lens 100.

Furthermore, the fifth lens element L5 and the sixth lens element L6 are cemented together to form a cemented lens, and since the fifth lens element L5 has positive refractive power and the sixth lens element L6 has negative refractive power, the chromatic aberration of the optical lens 100 can be reduced, the spherical aberration of the optical lens 100 can be corrected, and the resolution of the optical lens 100 can be improved.

It is considered that the optical lens 100 may be applied to an electronic apparatus such as an in-vehicle device, a driving recorder, or an automobile. When the optical lens 100 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, the sixth lens L6 and the seventh lens L7 are made of glass, so that the optical lens 100 has a good optical effect and the influence of temperature on the lenses can be reduced. Of course, some lenses of the plurality of lenses of the optical lens 100 may be made of glass, some lenses may be made of plastic, and for example, the first lens L1 and the fourth lens L4 are made of glass, and the second lens L2, the third lens L3, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are made of plastic, so that not only the influence of temperature on the lenses can be reduced to achieve a better imaging effect, but also the processing cost of the lenses and the weight of the lenses can be reduced, thereby reducing the processing cost of the optical lens 100 and the overall weight of the optical lens 100.

In addition, it is understood that, in other embodiments, when the optical lens 100 is applied to an electronic device such as a smart phone or a smart tablet, 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 and the seventh lens L7 may be plastic, so as to reduce the overall weight of the optical lens 100.

Alternatively, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 may all be spherical or aspheric. Certainly, part of the lenses can be set to be spherical surfaces, and part of the lenses can be aspheric surfaces, so that the processing difficulty of the lenses can be reduced by adopting the aspheric surface design, and the surface types of the lenses can be easily controlled.

In some embodiments, the optical lens 100 further includes a stop 102, and the stop 102 may be an aperture stop or a field stop, which may be disposed between the object side of the optical lens 100 and the object side S1 of the first lens L1. It is understood that, in other embodiments, the diaphragm 102 may also be disposed between two adjacent lenses, for example, between the fourth lens L4 and the fifth lens L5, and the setting position of the diaphragm 102 may be adjusted according to practical situations, which is not specifically limited in this embodiment.

In some embodiments, the optical lens 100 further includes an optical filter L8, such as an infrared filter, disposed between the image-side surface of the seventh lens element L7 and the image plane 101 of the optical lens 100, so as to filter out light in other bands, such as visible light, and only allow infrared light to pass through, and therefore, the optical lens 100 can be used as the infrared optical lens 100, that is, the optical lens 100 can image in a dark environment and other special application scenes and can obtain a better image effect.

In some embodiments, the optical lens 100 satisfies the following relationship: 120deg/mm < FOV/f < 145deg/mm, where FOV is the maximum field angle of the optical lens 100 and f is the effective focal length of the optical lens 100. The optical lens 100 can have a large monitoring area when the optical lens 100 is applied to a vehicle by controlling a ratio of a field angle to a focal length to obtain a large field angle. In addition, by controlling the ratio of the field angle to the focal length, the optical lens 100 can have a smaller deflection angle of the emergent light, and the problem of the edge dark angle of the optical lens 100 is alleviated. When the FOV/f is larger than or equal to 145deg/mm, the focal length of the optical lens 100 is too small, the processing sensitivity of the optical lens 100 is high, and the reduction of the deflection angle of the emergent light is also not facilitated, so that the risk of the dark angle at the edge of the optical lens 100 is increased. When the FOV/f is less than or equal to 120deg/mm, the field angle of the optical lens 100 is small, so that the monitoring area of the optical lens 100 is small when the optical lens is applied to automobiles, and the driving safety is low.

In some embodiments, the optical lens 100 satisfies the following relationship: 11deg/mm < | CRA/SAGs72| < 23deg/mm, where CRA is the chief ray incident angle of the optical lens 100, SAGs14 is the distance in the direction of the optical axis o from the maximum effective aperture of the image-side surface of the seventh lens L7 to the intersection point of the image-side surface of the seventh lens L7 and the optical axis o, that is, the rise of the image-side surface of the seventh lens L7. Through the ratio scope of the rise of the image side face of the chief ray incident angle of control optical lens 100 and seventh lens L7, thereby the face type of the image side face of effective control seventh lens L7, make the image side face of seventh lens L7 not too crooked, ghost risk is lower, be favorable to reducing the angle that light beam jetted into image plane 101 simultaneously, when this optical lens 100 was applied to the module of making a video recording, can shoot into the sensitization chip of the module of making a video recording with less angle, be favorable to improving the sensitization performance of the module of making a video recording. When CRA/SAGs72| ≧ 23deg/mm, the chief ray incident angle of the optical lens 100 is too large to match the photosensitive chip. When | CRA/SAGs72| ≦ 11deg/mm, the sagittal height of the image-side surface of the seventh lens L7 is too large, so that the profile of the image-side surface of the seventh lens L7 may be too curved, increasing the risk of ghost images.

In some embodiments, the optical lens 100 satisfies the following relationship: 4< Rs11/SAGs11<6, where Rs11 is the radius of curvature of the object-side surface S1 of the first lens L1 at the optical axis o, and SAGs11 is the distance from the maximum effective aperture of the object-side surface S1 of the first lens L1 to the intersection point of the object-side surface S1 of the first lens L1 and the optical axis o in the direction of the optical axis o, that is, the rise of the object-side surface S1 of the first lens L1. By controlling the ratio of the curvature radius of the object-side surface S1 of the first lens element L1 to the rise of the object-side surface of the first lens element L1, the negative refractive power is provided for the first lens element L1, which is beneficial to controlling the maximum effective aperture of the object-side surface S1 of the first lens element L1, and is beneficial to collecting incident light rays with larger angles to enter the optical lens 100, so as to increase the field angle of the optical lens 100, and when the optical lens 100 is applied to automobiles, a larger monitoring range can be achieved. When the refractive power of the first lens element L1 is too large when Rs11/SAGs11 is greater than or equal to 6, the imaging effect of the image plane 101 is sensitive to the variation of the refractive power of the first lens element L1, and thus larger aberration is generated. When Rs11/SAGs11 is less than or equal to 4, the height of the object side S1 of the first lens L1 is too high, and the first lens L1 is too bent, so that the ghost image risk is increased.

In some embodiments, the optical lens 100 satisfies the following relationship: 12< f56/f <21, where f56 is the combined focal length of the fifth lens L5 and the sixth lens L6. Through the reasonable proportion of the combined focal length of the fifth lens L5 and the sixth lens L6 and the focal length of the optical lens 100, the fifth lens L5 and the sixth lens L6 which are used for controlling the optical lens 100 are favorable for converging light rays, so that the light rays with large angles are in smooth transition, the resolving power is favorably improved, and the imaging quality is improved. When f56/f is greater than or equal to 21, the refractive power of the fifth lens element L5 and the sixth lens element L6 is too small, which is likely to generate large edge aberration and chromatic aberration, resulting in a low resolution of the optical lens assembly. When f56/f is less than or equal to 12, the refractive power of the fifth lens element L5 and the sixth lens element L6 is too large, so that astigmatism is easily generated in the combined lens element, and the imaging quality of the optical lens system is reduced.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.6< CT7/BFL <1.3, where CT7 is the thickness of the seventh lens element L7 on the optical axis o, and BFL is the distance between the image-side surface of the seventh lens element L7 and the image plane 101 of the optical lens assembly 100 on the optical axis o. By controlling the ratio of the thickness of the seventh lens element L7 on the optical axis o to the distance from the image-side surface of the seventh lens element L7 to the image-side surface 101 of the optical lens system 100 on the optical axis o, the thickness of the seventh lens element L7 on the optical axis o and the distance from the image-side surface 101 to the seventh lens element L7 can be reasonably controlled, so as to improve the compactness of the optical lens system 100 and to achieve the miniaturization of the optical lens system 100, and when the optical lens system 100 is applied to a camera module, the optical lens system 100 is more matched with a photosensitive chip of the camera module, and the eccentricity sensitivity of the seventh lens element L7 is lower. When CT7/BFL is greater than or equal to 1.3, the thickness of the seventh lens L7 on the optical axis o is too thick, which results in a structure of the optical lens 100 not compact enough and is not good for miniaturization of the optical lens 100. When CT7/BFL is less than or equal to 0.6, the distance between the image-side surface of the seventh lens element L7 and the image plane 101 of the optical lens 100 on the optical axis o is long, and when the optical lens 100 is applied to a camera module, it is not easy to match with a photo-sensor chip of the camera module, and the eccentricity sensitivity of the seventh lens element L7 is large.

In some embodiments, the optical lens 100 satisfies the following relationship: 4.5 < SD21/CT 2< 5.5, wherein SD21 is the maximum effective half aperture of the object side surface S3 of the second lens L2, and CT2 is the thickness of the second lens L2 on the optical axis o. By controlling the ratio of the maximum effective half aperture of the object-side surface S3 of the second lens element L2 to the thickness of the second lens element L2 on the optical axis o, the size of the maximum effective half aperture of the object-side surface S3 of the second lens element L2 can be effectively controlled, and by matching the smaller thickness of the second lens element L2 on the optical axis o, the volume of the optical lens 100 can be compressed to a greater extent, the total length of the optical lens 100 can be reduced, so that the optical lens 100 can be miniaturized, and the risk of ghost can be reduced. When SD21/CT2 is more than or equal to 5.5, the maximum effective half aperture of the object side surface S3 of the second lens L2 is larger, and the ghost risk is increased. When the SD21/CT2 is less than or equal to 4.5, the thickness of the second lens L2 on the optical axis o is larger, so that the total length of the optical lens 100 is longer, which is not beneficial to realizing the miniaturization of the optical lens 100, and the cost of the second lens L2 is higher.

In some embodiments, the optical lens 100 satisfies the following relationship: 7< Rs31/CT3<10, where Rs31 is the radius of curvature of the object-side surface S5 of the third lens L3 at the optical axis o, and CT3 is the thickness of the third lens L3 at the optical axis o. By controlling the ratio of the curvature radius of the object-side surface S5 of the third lens element L3 to the thickness of the third lens element L3 on the optical axis o, the degree of curvature of the third lens element L3 can be controlled, so that the thickness of the third lens element L3 on the optical axis o is small, thereby reducing the risk of generating ghost images, and simultaneously, the edge aberration of the optical lens 100 can be corrected, and the generation of astigmatism can be suppressed. When Rs31/CT3 is equal to or greater than 10, the curvature radius of the object-side surface S5 of the third lens element L3 is too large, which is disadvantageous to aberration correction of the optical lens 100 and tends to generate astigmatism. When the Rs31/CT3 is less than or equal to-7, the thickness of the third lens L3 on the optical axis o is too thick, which increases the risk of ghost images and is not favorable for realizing the miniaturized design of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 6< TTL/AT 2< 8, where TTL is a distance on the optical axis o from the object-side surface S1 of the first lens element L1 to the image plane 101 of the optical lens 100, i.e., a total length of the optical lens 100, and AT2 is an air distance on the optical axis o from the image-side surface S4 of the second lens element L2 to the object-side surface S5 of the third lens element L3, i.e., an air distance between the second lens element L2 and the third lens element L3. By controlling the ratio of the total length of the optical lens 100 to the air distance between the object side surface S3 of the second lens L2 and the object side surface S5 of the third lens L3 on the optical axis o, the situation that the air distance between the second lens L2 and the third lens L3 is too large to increase the sensitivity of the optical lens 100 can be avoided, so that the tolerance of the second lens L2 and the third lens L3 can be conveniently controlled, and the production difficulty and the production cost can be favorably reduced. When TTL/AT2 is greater than or equal to 8, the total length of the optical lens 100 is large, which is not conducive to the miniaturization of the optical lens 100, and when the optical lens 100 is applied to a vehicle, it is not conducive to the miniaturization of the vehicle-mounted lens. When TTL/AT2 is less than or equal to 6, the air gap between the second lens L2 and the third lens L3 is large, which increases the sensitivity of the optical lens 100, and thus requires additional tolerance control of the second lens L2 and the third lens L3, which increases the difficulty and cost of production.

In some embodiments, the optical lens 100 satisfies the following relationship: 8.5 < Rs62/SAGs71 < 13, where Rs62 is the radius of curvature of the image-side surface S12 of the sixth lens L6 of the optical lens, and SAGs71 is the distance in the direction of the optical axis o from the maximum effective aperture of the object-side surface S13 of the seventh lens L7 of the optical lens 100 to the intersection point of the object-side surface S13 of the seventh lens L7 and the optical axis o, that is, the rise of the object-side surface S13 of the seventh lens L7. Due to the fact that the ratio of the curvature radius of the image side surface S12 of the sixth lens L6 to the rise of the object side surface S13 of the seventh lens L7 can be reasonably controlled to be 8.5 < Rs62/SAGs71 < 13, light rays passing through the sixth lens L6 can smoothly enter the seventh lens L7, the bending degree of the light rays between the sixth lens L6 and the seventh lens L7 is reduced, and curvature of field and distortion are reduced. When the Rs62/SAGs71 is less than or equal to 8.5, the rise of the object side surface of the seventh lens L7 is too large, so that the light deflection angle is too large, and the field curvature and the distortion are large. When Rs62/SAGs71 is equal to or greater than 13, the radius of curvature of the sixth lens L6 is large, so that the power of the sixth lens L6 is not easily distributed, and the thickness of the sixth lens L6 in the optical axis o direction is large, which is disadvantageous to the compact design of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 2< SD11/SAGs11<4, where SD11 is the maximum effective half aperture of the object side S1 of the first lens L1. Because 2< SD11/SAGs11<4, the rise ratio of the effective half aperture of the object-side surface S1 of the first lens L1 to the object-side surface S1 of the first lens L1 can be reasonably controlled, which is beneficial to controlling the aperture of the optical lens 100, realizing the small aperture design of the optical lens 100, and simultaneously meeting the requirement of a large field angle required by the optical lens 100. When SD11/SAGs11 is greater than or equal to 4, the effective half aperture of the object-side surface S1 of the first lens L1 is too large to realize the small aperture design of the optical lens 100. When SD11/SAGs11 is less than or equal to 2, the rise of the object-side surface S1 of the first lens L1 is too large, and the surface shape of the object-side surface S1 of the first lens L1 is too curved, so that the ghost image risk is increased.

In some embodiments, the optical lens 100 satisfies the following relationship: 30< Rs42/ET4<55, where Rs42 is a curvature radius of the object-side surface S7 of the fourth lens L4 at the optical axis o, and ET4 is a distance from the maximum effective aperture of the object-side surface S7 of the fourth lens L4 to the maximum effective aperture of the image-side surface S8 of the fourth lens L4 at the optical axis o direction at ET4, that is, an edge thickness of the fourth lens L4. Due to the fact that the ratio of the curvature radius of the image side surface S8 of the fourth lens element L4 to the edge thickness of the fourth lens element L4 can be reasonably controlled within 30< Rs42/ET4<55, the bending degree of the fourth lens element L4 can be favorably controlled, ghost image risks can be reduced, meanwhile, edge aberrations of the optical lens can be favorably corrected, and astigmatism can be restrained. When Rs42/ET4 is equal to or greater than 55, the radius of curvature of the image-side surface S8 of the fourth lens element L4 is too large, which is not favorable for aberration correction of the optical lens 100. When Rs42/ET4 is less than or equal to 30, the edge thickness of the fourth lens element L4 is too large, so that the ratio of the edge thickness of the fourth lens element L4 to the center thickness of the fourth lens element L4 (i.e., the thickness of the fourth lens element L4 at the optical axis o) is increased, which results in an increase in the processing sensitivity of the fourth lens element L4 and an increase in the processing difficulty, thereby reducing the production yield of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 70mm²＜f1*TTL＜85.5mm²Wherein f1 is the focal length of the first lens L1. When the relational expression is satisfied, the distribution of the refractive power of the first lens element L1 is facilitated, the situation that the assembly of the optical lens 100 is affected due to the excessively large bending degree of the first lens element L1 is avoided, and meanwhile, the collection of the light rays entering the optical lens 100 by the first lens element L1 is facilitated, so that the field angle of the optical lens 100 is improved, and the improvement of the imaging resolution is facilitated. Further, the overall length of the optical lens 100 can be shortened, thereby realizing a compact design of the optical lens 100. When f1 TTL is more than or equal to 85.5mm²When the focal length of the first lens L1 is too large, the total length of the optical lens 100 is too large, resulting in the first lens L1 being too curved, which is disadvantageous for assembly and for achieving a compact design of the optical lens 100. When f1 TTL is less than or equal to 70mm²When the focal length of the first lens L1 is too small, it is not favorable for the first lens L1 to collect the light entering the optical lens 100, and the angle of view of the optical lens 100 is small, which makes it difficult to meet the design requirement of large angle of view.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.5 < TTL/ImgH × 2< 2.4, where ImgH is the radius of the effective imaging circle of the optical lens 100. Because TTL/ImgH 2 is greater than 1.5 and less than 2.4, the ratio of the total length of the optical lens 100 to the radius of the effective imaging circle can be reasonably controlled, thereby ensuring that the optical lens 100 has a larger field angle to better capture details of a photographed object, and simultaneously being beneficial to controlling the total length of the optical lens 100 and realizing the miniaturization design of the optical lens 100. When TTL/ImgH 2 is greater than or equal to 2.4, the total length of the optical lens 100 is too large, which is not favorable for implementing a compact design of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 1< AT2/SAGs22 < 1.5, wherein SAGs22 is a distance in the direction of the optical axis o from the maximum effective aperture of the image-side surface S4 of the second lens L2 to the intersection point of the image-side surface S4 of the second lens L2 and the optical axis o, that is, the rise of the image-side surface S4 of the second lens L2. Because 1< AT2/SAGs22 < 1.5, the ratio of the air space of the second lens L2 to the third lens L3 on the optical axis o to the rise of the image side surface S4 of the second lens L2 can be effectively controlled, the rise of the image side surface S4 of the second lens L2 can be effectively controlled, and simultaneously the air space between the second lens L2 and the third lens L3 is matched, the total length of the optical lens 100 can be reduced, and the risk of generating ghost images is reduced. When AT2/SAGs22 is equal to or greater than 1.5, the air gap between the second lens L2 and the third lens L3 is large, which results in an increase in the sensitivity of the air gap between the second lens L2 and the third lens L3, and is not favorable for assembling the second lens L2 and the third lens L3. When AT2/SAGs22 is less than or equal to 1, the rise of the image side surface S4 of the second lens L2 is too large, and the light entering the second lens L2 is seriously deflected, which is not beneficial to reducing the edge aberration of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 24 < CRA/SAGs71 < 43, where SAGs71 is a distance in the optical axis o direction from the maximum effective aperture of the object-side surface S13 of the seventh lens L7 to the intersection of the object-side surface S13 of the seventh lens L7 and the optical axis o, that is, the sagittal height of the object-side surface S13 of the seventh lens L7. Because 24 < CRA/SAGs71 < 43, the ratio of the incident angle of the principal ray to the rise of the object side surface S13 of the seventh lens L7 can be effectively controlled, so that the object side surface S13 of the seventh lens L7 is not too curved, the processing sensitivity of the object side surface S13 of the seventh lens L7 is low, and meanwhile, the angle of the principal ray to be shot into the imaging surface 101 is favorably reduced, namely, when the optical lens 100 is applied to a camera module, the ray angle of a photosensitive chip shot into the camera module is small, and the photosensitive performance of the photosensitive chip is favorably improved. When CRA/SAGs71 is larger than or equal to 43, the incident angle of the principal ray is too large, when the optical lens 100 is applied to a camera module, matching with a photosensitive chip is not facilitated, relative illumination is crossed, and the imaging effect is not ideal. When CRA/SAGs71 is equal to or less than 24, the rise of the object-side surface S13 of the seventh lens L7 is too large, and the angle of the main incident ray is small, so that the object-side surface S13 of the seventh lens L7 is too curved, the processing sensitivity of the object-side surface S13 of the seventh lens L7 is high, and the angle of view of the optical lens 100 is small.

In some embodiments, the optical lens 100 satisfies the following relationship: 6< TTL/(CT2+ CT3+ CT6) < 7.65, wherein CT6 is the thickness of the sixth lens L6 on the optical axis o. Because TTL/(CT2+ CT3+ CT6) < 7.65 is more than 6, the ratio of the central thicknesses of the second lens L2, the third lens L3 and the sixth lens L6 to the total length of the optical lens 100 can be strictly controlled, and the total length of the optical lens 100 can be shortened. When TTL/(CT2+ CT3+ CT6) ≥ 7.65, the total length of the optical lens 100 is too large, which is not favorable for realizing the miniaturized design of the optical lens 100. When TTL/(CT2+ CT3+ CT6) is less than or equal to 6, the center thicknesses of the second lens L2, the third lens L3 and the sixth lens L6 are too large, which may increase the eccentricity tolerance between the lenses, increase the processing difficulty, and reduce the production yield of the optical lens 100.

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, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop 102, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in order from the object side to the image side along an optical axis o. For the materials, refractive powers and surface shapes 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, the sixth lens element L6 and the seventh lens element L7, reference is made to the above-mentioned embodiments, which are not repeated herein.

Specifically, other parameters of the optical lens 100 are given in table 1 below, taking as an example that the effective focal length f of the optical lens 100 is 1.448mm, the aperture size FNO of the optical lens 100 is 2.05, the field angle FOV of the optical lens 100 is 184deg, and the total optical length TTL of the optical lens 100 is 14.5 mm. The elements of the optical lens 100 from the object side to the image side along the optical axis o are arranged in the order of the elements from top to bottom in table 1. In the same lens, the surface with the smaller surface number is the object side surface of the lens, and the surface with the larger surface number is the image side surface of the lens, and for example, the

surface numbers

1 and 2 correspond to the object side surface S1 and the image side surface S2 of the first lens L1, respectively. The Y radius in table 1 is the radius of curvature of the object-side or image-side surface of the respective surface number at the paraxial region o. The first value in the "thickness" parameter set of a lens is the thickness of the lens on the optical axis o, and the second value is the distance from the image-side surface to the back surface of the lens on the optical axis o. The numerical value of the stop 102 in the "thickness" parameter column is the distance from the stop 102 to the vertex of the next surface (the vertex refers to the intersection point of the surface and the optical axis o) on the optical axis o, the direction from the object-side surface S1 of the first lens L1 to the image-side surface of the last lens is the positive direction of the optical axis o, when the value is negative, it indicates that the stop 102 is disposed on the right side of the vertex of the next surface, and if the thickness of the stop 102 is a positive value, the stop 102 is disposed on the left side of the vertex of the next surface. It is understood that the units of the radius Y, thickness, and focal length in table 1 are all mm. The reference wavelength of the refractive index and Abbe number of each lens in Table 1 was 587.6nm, and the reference wavelength of the effective focal length was 538 nm.

TABLE 1

In the first embodiment, in the first lens L1 to the seventh lens L7, the object-side surface and the image-side surface of the partial lens are spherical, the object-side surface and the image-side surface of the partial lens are aspherical, and the surface type x of the aspherical lens can be defined by, but is not limited to, the following aspherical equation:

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 paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius R of Y in table 1 above); k is a conic coefficient; ai is a correction coefficient corresponding to the high-order term of the ith aspheric term. Table 2 shows the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for the respective aspherical mirrors S3-S6 and S10-S14 in the first embodiment.

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 wavelengths of 408nm, 473nm, 538nm, 600nm and 668 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 538 nm. Wherein the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the field angle of the optical lens in deg. 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 538 nm. Wherein the abscissa along the X-axis direction represents distortion, and the ordinate along the Y-axis direction represents the angle of view of the optical lens in deg. As can be seen from (C) in fig. 2, the distortion of the optical lens 100 can be corrected at a wavelength of 538 nm.

Second embodiment

Referring to fig. 3, fig. 3 is a schematic structural diagram of an optical lens 100 according to a second embodiment of the present application, and illustrates optical paths of a paraxial ray λ 1 and an edge ray λ 2. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop 102, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis o. For the materials, refractive powers and surface shapes 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, the sixth lens element L6 and the seventh lens element L7, reference is made to the above-mentioned embodiments, which are not repeated herein.

In the second embodiment, the effective focal length F of the optical lens 100 is 1.454mm, the aperture size FNO of the optical lens 100 is 2.05, the FOV of the field angle of the optical lens 100 is 184deg, and the total optical length TTL of the optical lens 100 is 14.3mm, for example.

Other parameters in the second embodiment are given in the following table 3, and the definitions of the parameters can be obtained from the description of the foregoing embodiments, which are not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 3 are all mm. The reference wavelength of refractive index and Abbe number of each lens in Table 3 was 587.6nm, and the reference wavelength of effective focal length was 538 nm.

TABLE 3

In the second embodiment, table 4 gives the high-order term coefficients that can be used for each aspherical surface in the second embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

TABLE 4

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

Third embodiment

Referring to fig. 5, fig. 5 shows a schematic structural diagram of an optical lens 100 according to a third embodiment of the present application, and shows optical paths of a paraxial ray λ 1 and an edge ray λ 2. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop 102, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis o. For the materials, refractive powers and surface shapes 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, the sixth lens element L6 and the seventh lens element L7, reference is made to the above-mentioned embodiments, which are not repeated herein.

In the third embodiment, the effective focal length F of the optical lens 100 is 1.316mm, the aperture size FNO of the optical lens 100 is 2.05, the field angle FOV of the optical lens 100 is 184deg, and the total optical length TTL of the optical lens 100 is 14mm, for example.

Other parameters in the third embodiment are shown in the following table 5, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 5 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 5 was 587.6nm, and the reference wavelength of effective focal length was 538 nm.

TABLE 5

In the third embodiment, table 6 gives the high-order term coefficients that can be used for each aspherical surface in the third embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

TABLE 6

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

Fourth embodiment

Referring to fig. 7, fig. 7 is a schematic structural diagram of an optical lens 100 according to a fourth embodiment of the present application, and illustrates optical paths of a paraxial ray λ 1 and an edge ray λ 2. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop 102, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis o. For the materials, refractive powers and surface shapes 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, the sixth lens element L6 and the seventh lens element L7, reference is made to the above-mentioned embodiments, which are not repeated herein.

In the fourth embodiment, the effective focal length f of the optical lens 100 is 1.449mm, the aperture size FNO of the optical lens 100 is 2.05, the field angle FOV of the optical lens 100 is 184deg, and the total optical length TTL of the optical lens 100 is 14mm, for example.

Other parameters in the fourth embodiment are shown in the following table 7, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 7 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 7 was 587.6nm, and the reference wavelength of effective focal length was 538 nm.

TABLE 7

In the fourth embodiment, table 8 gives the high-order term coefficients that can be used for each aspherical surface in the fourth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

TABLE 8

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

Fifth embodiment

Referring to fig. 9, fig. 9 is a schematic structural diagram of an optical lens 100 according to a fifth embodiment of the present application, and illustrates optical paths of a paraxial ray λ 1 and an edge ray λ 2. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop 102, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis o. For the materials, refractive powers and surface shapes 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, the sixth lens element L6 and the seventh lens element L7, reference is made to the above-mentioned embodiments, which are not repeated herein.

In the fifth embodiment, the effective focal length f of the optical lens 100 is 1.454mm, the aperture size FNO of the optical lens 100 is 2.05, the field angle FOV of the optical lens 100 is 184deg, and the total optical length TTL of the optical lens 100 is 14mm, for example.

Other parameters in the fifth embodiment are shown in the following table 7, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 7 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 7 was 587.6nm, and the reference wavelength of effective focal length was 538 nm.

TABLE 9

In the fifth embodiment, table 10 gives the high-order term coefficients that can be used for each aspherical surface in the fifth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

Watch 10

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

Sixth embodiment

Referring to fig. 11, fig. 11 shows a schematic structural diagram of an optical lens 100 according to a sixth embodiment of the present application, and shows optical paths of a paraxial ray λ 1 and an edge ray λ 2. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop 102, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis o. For the materials, refractive powers and surface shapes 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, the sixth lens element L6 and the seventh lens element L7, reference is made to the above-mentioned embodiments, which are not repeated herein.

In the sixth embodiment, the effective focal length f of the optical lens 100 is 1.481mm, the aperture size FNO of the optical lens 100 is 2.05, the field angle FOV of the optical lens 100 is 184deg, and the total optical length TTL of the optical lens 100 is 13mm, for example.

Other parameters in the sixth embodiment are given in the following table 11, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 11 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 11 was 587.6nm, and the reference wavelength of effective focal length was 538 nm.

TABLE 11

In the sixth embodiment, table 12 gives the high-order term coefficients that can be used for each aspherical surface in the sixth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

TABLE 12

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

Seventh embodiment

Referring to fig. 13, fig. 13 is a schematic structural diagram of an optical lens 100 according to a seventh embodiment of the present application, and illustrates optical paths of a paraxial ray λ 1 and an edge ray λ 2. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop 102, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis o. For the materials, refractive powers and surface shapes 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, the sixth lens element L6 and the seventh lens element L7, reference is made to the above-mentioned embodiments, which are not repeated herein.

In the seventh embodiment, the effective focal length f of the optical lens 100 is 1.312mm, the aperture size FNO of the optical lens 100 is 2.05, the field angle FOV of the optical lens 100 is 184deg, and the total optical length TTL of the optical lens 100 is 13.75mm, for example.

The other parameters in the seventh embodiment are given in the following table 13, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 13 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 13 was 587.6nm, and the reference wavelength of effective focal length was 538 nm.

Watch 13

In the seventh embodiment, table 14 gives the high-order term coefficients that can be used for each aspherical surface in the seventh embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

TABLE 14

Referring to fig. 14, as can be seen from the light spherical aberration diagram (a) in fig. 14, the light astigmatism diagram (B) in fig. 14, and the distortion diagram (C) in fig. 14, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 14 (a), fig. 14 (B), and fig. 14 (C), reference may be made to the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C), and details thereof are not repeated here.

Eighth embodiment

Referring to fig. 15, fig. 15 shows a schematic structural diagram of an optical lens 100 according to an eighth embodiment of the present application, and shows optical paths of a paraxial ray λ 1 and an edge ray λ 2. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop 102, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis o. For the materials, refractive powers and surface shapes 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, the sixth lens element L6 and the seventh lens element L7, reference is made to the above-mentioned embodiments, which are not repeated herein.

In the eighth embodiment, the effective focal length f of the optical lens 100 is 1.305mm, the aperture size FNO of the optical lens 100 is 2.05, the field angle FOV of the optical lens 100 is 184deg, and the total optical length TTL of the optical lens 100 is 13.563mm, for example.

The other parameters in the eighth embodiment are given in the following table 15, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 15 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 15 was 587.6nm, and the reference wavelength of effective focal length was 538 nm.

Watch 15

In the eighth embodiment, table 16 gives the high-order term coefficients that can be used for each aspherical surface in the eighth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

TABLE 16

Referring to fig. 16, as can be seen from the light spherical aberration diagram (a) in fig. 16, the light astigmatism diagram (B) in fig. 16, and the distortion diagram (C) in fig. 16, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 16 (a), fig. 16 (B), and fig. 16 (C), reference may be made to the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C), and details thereof are not repeated here.

Ninth embodiment

Referring to fig. 17, fig. 17 shows a schematic structural diagram of an optical lens 100 according to a ninth embodiment of the present application, and shows optical paths of a paraxial ray λ 1 and an edge ray λ 2. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop 102, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis o. For the materials, refractive powers and surface shapes 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, the sixth lens element L6 and the seventh lens element L7, reference is made to the above-mentioned embodiments, which are not repeated herein.

In the ninth embodiment, the effective focal length f of the optical lens 100 is 1.413mm, the aperture size FNO of the optical lens 100 is 2.05, the field angle FOV of the optical lens 100 is 184deg, and the total optical length TTL of the optical lens 100 is 13.6mm, for example.

The other parameters in the ninth embodiment are shown in the following table 17, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 17 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 17 was 587.6nm, and the reference wavelength of effective focal length was 538 nm.

TABLE 17

In the ninth embodiment, table 18 gives the high-order term coefficients that can be used for each aspherical surface in the ninth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

Watch 18

Referring to fig. 18, as can be seen from the spherical aberration diagram (a) in fig. 18, the astigmatism diagram (B) in fig. 18 and the distortion diagram (C) in fig. 18, the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 18 (a), fig. 18 (B), and fig. 18 (C), reference may be made to the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C), and details thereof are not repeated herein.

Tenth embodiment

Referring to fig. 19, fig. 19 is a schematic structural diagram of an optical lens 100 according to a tenth embodiment of the present application, and illustrates optical paths of a paraxial ray λ 1 and an edge ray λ 2. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop 102, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis o. For the materials, refractive powers and surface shapes 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, the sixth lens element L6 and the seventh lens element L7, reference is made to the above-mentioned embodiments, which are not repeated herein.

In the tenth embodiment, the effective focal length f of the optical lens 100 is 1.366mm, the aperture size FNO of the optical lens 100 is 2.05, the field angle FOV of the optical lens 100 is 184deg, and the total optical length TTL of the optical lens 100 is 13.3mm, for example.

The other parameters in the tenth embodiment are shown in the following table 19, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 19 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 19 was 587.6nm, and the reference wavelength of effective focal length was 538 nm.

Watch 19

In the tenth embodiment, table 20 gives the high-order term coefficients that can be used for each aspherical surface in the tenth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

Watch 20

Referring to fig. 20, as can be seen from the light spherical aberration diagram (a) in fig. 20, the light astigmatism diagram (B) in fig. 20, and the distortion diagram (C) in fig. 20, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 20 (a), fig. 20 (B), and fig. 20 (C), reference may be made to the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C), and details thereof are not repeated herein.

Referring to table 21, table 21 summarizes ratios of the relations in the first embodiment to the tenth embodiment of the present application.

TABLE 21

Referring to fig. 21, the present application further discloses a camera module, where the camera module 200 includes a photo sensor 201 and the optical lens 100 according to any of the first to fifth embodiments, and the photo sensor 201 is disposed at an image side of the optical lens 100. The optical lens 100 may be configured to receive a light signal of a subject and project the light signal to the light sensing chip 201, and the light sensing chip 201 may be configured to convert the light signal corresponding to the subject into an image signal. And will not be described in detail herein. It can be understood that the camera module 200 having the optical lens 100 has all the technical effects of the optical lens 100, that is, the optical lens 100 can obtain a larger angle of view by controlling the ratio of the angle of view to the focal length, so that the optical lens 100 can have a larger monitoring area when applied to automobiles. In addition, by controlling the ratio of the field angle to the focal length, the optical lens 100 can have a smaller deflection angle of the emergent light, and the problem of the edge dark angle of the optical lens 100 is alleviated. 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. 22, the present application further discloses an electronic device, where the electronic device 300 includes a housing 301 and the camera module 200 as described above, and the camera module 200 is disposed on the housing 301 to obtain image information. The electronic device 300 may be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a smart watch, a monitor, and the like. It can be understood that the electronic device 300 having the camera module 200 also has all the technical effects of the optical lens 100. That is, the optical lens 100 of the electronic device 300 has a larger field angle, so that when the optical lens 100 is applied to a vehicle, a larger monitoring area can be provided, and in addition, the deflection angle of the emergent light is smaller, so that the problem of the edge dark angle of the optical lens 100 is alleviated. 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. 23, the present application further discloses an automobile, which includes an automobile body 401 and the camera module 200 as described above, wherein the camera module 200 is disposed on the automobile body 401 to obtain image information. It can be understood that the automobile having the camera module 200 has all the technical effects of the optical lens 100. That is, the optical lens 100 has a large field angle to realize a large monitoring area, and also has a small deflection angle of the outgoing light, which alleviates the problem of the edge dark angle of the optical lens 100.

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 element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element, which are disposed in order from an object side to an image side along an optical axis;

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

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

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

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

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

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

the optical lens satisfies the following relation: 120deg/mm < FOV/f < 145 deg/mm;

wherein FOV is the maximum field angle of the optical lens, and f is the effective focal length of the optical lens.

2. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

11deg/mm＜|CRA/SAGs72|＜23deg/mm；

the CRA is a chief ray incidence angle of the optical lens, and the SAGs72 is a distance from a maximum effective aperture of the image-side surface of the seventh lens to an intersection point of the image-side surface of the seventh lens and the optical axis in the optical axis direction.

3. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

4<Rs11/SAGs11<6；

wherein Rs11 is a curvature radius of the object-side surface of the first lens at the optical axis, and sag 11 is a distance 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 in the optical axis direction.

4. An optical lens according to claim 1, wherein the fifth lens is cemented with the sixth lens to form a cemented lens, and the optical lens satisfies the following relation:

12<f56/f<21；

wherein f56 is a combined focal length of the fifth lens and the sixth lens.

5. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

0.6<CT7/BFL<1.3；

wherein CT7 is the thickness of the seventh lens element on the optical axis, and BFL is the distance from the image-side surface of the seventh lens element to the image plane of the optical lens system on the optical axis.

6. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

4.5＜SD21/CT2＜5.5；

wherein SD21 is the maximum effective half aperture of the object-side surface of the second lens, and CT2 is the thickness of the second lens on the optical axis.

7. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

-7<Rs31/CT3<10；

wherein Rs31 is a radius of curvature of an object-side surface of the third lens element at the optical axis, and CT3 is a thickness of the third lens element at the optical axis.

8. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

6＜TTL/AT2＜8；

wherein TTL is a distance on the optical axis from the object-side surface of the first lens element to the image plane of the optical lens, and AT2 is an air distance on the optical axis from the object-side surface of the second lens element to the object-side surface of the third lens element.

9. A camera module, comprising a photo sensor chip and the optical lens of any one of claims 1-8, wherein the photo sensor chip is disposed on an image side of the optical lens.

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

11. An automobile, characterized in that the automobile comprises an automobile body and the camera module group according to claim 9, wherein the camera module group is arranged on the automobile body to obtain image information.