CN116736479A

CN116736479A - Lens assembly, camera module and electronic equipment

Info

Publication number: CN116736479A
Application number: CN202211297968.6A
Authority: CN
Inventors: 余洋华; 范雪霜; 李瑞亮
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-09-12

Abstract

The embodiment of the application provides a lens assembly, an image pickup module and electronic equipment, wherein the lens assembly comprises a plurality of lens units, and the plurality of lens units are arranged in a first plane parallel to an image plane of the lens units and are configured to image through the same image sensor; each lens unit comprises a plurality of lenses which are sequentially arranged from an object side to an image side along the optical axis direction of the lens unit, wherein the plurality of lenses respectively form a first lens group and a second lens group, and the first lens group is positioned on one side of the second lens group facing the object side and is configured to be capable of tilting relative to the second lens group so as to change the field angle of the lens assembly. The lens component provided by the application can ensure that the lens component has super-strong resolving power while realizing miniaturization of the lens component, can realize the effect of continuously changing shooting vision, and improves shooting experience of users.

Description

Lens assembly, camera module and electronic equipment

Technical Field

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

Background

In recent years, with the continuous development and wide application of camera modules, the pursuit of experience of people on electronic devices is also becoming extremely advanced, including the pursuit of miniaturization of the size of camera modules in electronic devices and the comprehension of shooting scenes thereof.

At present, the camera module comprises a lens and an image sensor, and light can enter the camera module through the lens and irradiate on the image sensor so as to form images. In order to match with an image sensor with a large target surface and have good imaging quality, in the design of a lens, the number of lenses in the lens needs to be increased to better correct aberration. The increase of the number of lenses directly causes the adverse phenomena of the increase of the height of the lenses, the thickness of the whole machine of the electronic equipment, and the like, and cannot meet the extremely-used experience of people on the lightening and thinning of the electronic equipment. If a lens with a smaller size is used, the height of the lens is reduced, but the lens cannot be matched with an image sensor with high pixels, so that the resolution of the lens is poor. The resolution mainly refers to the capability of the lens to restore high-frequency information of a shooting object.

How to make the lens have super-strong resolution while considering miniaturization of the lens has become a technical problem to be solved.

Disclosure of Invention

The application provides a lens assembly, a camera module and electronic equipment, which can ensure that the lens assembly has super-strong resolving power and can realize the effect of continuously changing shooting vision while realizing miniaturization of the lens assembly, thereby improving shooting experience of a user.

A first aspect of the present application provides a lens assembly including a plurality of lens units arranged in a first plane parallel to an image plane of the lens units and configured to be imaged by a same image sensor;

each lens unit comprises a plurality of lenses which are sequentially arranged from an object side to an image side along the optical axis direction of the lens unit, wherein the plurality of lenses respectively form a first lens group and a second lens group, and the first lens group is positioned on one side of the second lens group facing the object side and is configured to be capable of tilting relative to the second lens group so as to change the field angle of the lens assembly.

According to the application, the plurality of lens units in the lens assembly are arranged in the first plane parallel to the image surface of the lens units and are configured to image through the same image sensor, so that compared with the mode that the plurality of lens units are stacked in the optical axis direction of the lens units, the height of the lens assembly can be sufficiently reduced, the miniaturization of the lens assembly is realized, and meanwhile, the lens assembly with an ultra-large image height can be formed, so that the image sensor with high pixels is matched, and the aberration is corrected; secondly, through the arrangement of a plurality of lenses in the lens unit, the image sensor with high pixels is matched, and the aberration is corrected, so that the resolution of the lens assembly is improved; finally, through the setting of first lens group and second lens group in the lens unit, because first lens group is located the one side of second lens group orientation thing side to be configured to can incline for the second lens group, in order to change the angle of view of lens subassembly, like this, realize the miniaturization of lens subassembly, when guaranteeing that the lens subassembly has superstrong resolution power, through adjusting the relative inclination between first lens group and the second lens group, can also increase the imaging field of vision scope of lens subassembly, realize shooting field of vision continuous variation's efficiency, promote user's shooting experience.

In some alternative embodiments, the plurality of lens units have the same structure, so that the relative inclination angles between the first lens group and the second lens group of each lens unit in the lens assembly can be adjusted, thereby increasing the view angle of the lens assembly and ensuring the uniformity of the lens assembly in the height direction.

In some alternative embodiments, the plurality of lens units are uniformly arranged in the first plane, so as to ensure that the plurality of lens units can cover the same image sensor and form an oversized image-height lens assembly through imaging of the same image sensor. In some alternative embodiments, the optical axis of the first lens group and the optical axis of the second lens group intersect at all times to ensure continuity of the optical axis of the lens assembly when the first lens group is tilted with respect to the second lens group.

In some optional embodiments, the tiltable angle of the optical axis of the first lens group with respect to the optical axis of the second lens group is greater than or equal to 0 ° and less than or equal to 9.2 °, so that when the first lens group is adjusted within the tiltable angle range with respect to the second lens group, the field angle of the lens assembly can be increased, so as to accommodate the light rays of the object with wider field of view, and the objective of clear imaging can be achieved, meanwhile, the extreme experience that the field of view of the lens assembly can be changed continuously and substantially can be further achieved, and the shooting experience of the user can be improved.

In some optional embodiments, the angle of view of the lens assembly is greater than or equal to 72 ° and less than or equal to 108 °, so that the lens assembly has a wider field of view, can improve richer graphic information, has excellent visual impact, and improves the shooting experience of a user.

In some alternative embodiments, each lens has optical power such that the propagation angle of the overall light is varied by adjusting the optical power of each lens to facilitate imaging at the image plane of the lens unit.

In some optional embodiments, the first lens group includes at least a first lens, a second lens, a third lens, and a fourth lens disposed in order along an object side to an image side;

the second lens group at least comprises a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged along the object side to the image side.

Therefore, due to the arrangement of at least eight lenses in each lens unit, the lens units are spliced in the first plane, so that a lens assembly with an oversized image height can be formed, the height of the lens assembly is reduced, the miniaturization of the lens assembly is realized, and meanwhile, the lens assembly can be matched with an image sensor with high pixels to correct aberration, so that the resolution of the lens assembly is improved.

In some alternative embodiments, the lens unit and the first lens satisfy the following conditional expression: 126.80 f is not more than ₁ /f≤17.29；

Wherein f is the focal length of the lens unit, f ₁ Is the focal length of the first lens.

Therefore, the smoothness of the light entering the system is facilitated, the optimization space of aberration can be improved, and the imaging quality of the lens is ensured.

In some alternative embodiments, the size of the eighth lens satisfies the conditional expression:

1.67≤D ₈ /CT ₈ not more than 11.78; wherein D is ₈ CT for the center thickness of the eighth lens on the optical axis of the lens unit ₈ Is the optical effective diameter of the eighth lens.

Therefore, the eighth lens can obtain an ultra-small diameter-thickness ratio, the risk of wire outgoing injection molding welding wires of the eighth lens during injection molding is greatly reduced, imaging of the eighth lens is more in accordance with design specifications, and meanwhile, the aberration correction and high-quality imaging capabilities of the lens unit can be ensured.

In some alternative embodiments, the lens unit and the eighth lens satisfy the following conditional expression: BFL/f is more than or equal to 0.24 and less than or equal to 0.29;

wherein BFL is the distance from the image side of the eighth lens to the imaging surface of the lens unit along the optical axis of the lens unit.

Thus, the height of the lens assembly can be further reduced, and the miniaturization of the lens assembly can be realized.

In some optional embodiments, when the eighth lens is the last lens in the lens unit that is sequentially arranged from the object side to the image side in the optical axis direction of the lens unit, the lens unit and the eighth lens satisfy the conditional expression: the ratio of YI/IH is less than or equal to 0.99;

wherein, yl is the effective aperture of the image side of the eighth lens, and IH is the half height of the lens unit.

Therefore, the size of the lens assembly on the plane perpendicular to the optical axis of the lens unit can be effectively compressed, the axial distance between the lens assembly and a photosensitive element (such as an image sensor) is increased, the target surface size of the image sensor can be increased, and the resolution of the lens assembly on details of an object to be photographed is improved.

In some alternative embodiments, the first lens and the second lens satisfy the following conditional expression: maxY ₁₂ /IH≤0.62；

Wherein MaxY ₁₂ The maximum aperture of the first lens to the second lens.

Therefore, different adaptations of the front end size of the lens assembly can be realized, the light entering quantity of the system is ensured, the detail information of an imaging object is enriched, and the resolution capability of the module to details is improved.

In some alternative embodiments, the size of the sixth lens satisfies the conditional expression: -1.46 < R ₁₁ +R ₁₂ )/(R ₁₁ -R ₁₂₎ ≤-1.36；

Wherein R is ₁₁ Is the center radius of curvature of the object side surface of the sixth lens, R ₁₂ Is the center radius of curvature of the image side of the sixth lens.

Therefore, the surface type transition of the sixth lens can be ensured to be uniform, the sensitivity degree of the sixth lens to forming, assembling and other tolerances is reduced, and the actual production yield of the whole lens is improved.

In some alternative embodiments, the dimensions of the plurality of lenses satisfy the conditional expression:

1.87≤(CT ₂ +CT ₄ +CT ₇ )/(ET ₃ +ET ₅ +ET ₆ )≤2.00；

wherein CT ₂ CT for the center thickness of the second lens on the optical axis of the lens unit ₄ CT for the center thickness of the fourth lens on the optical axis of the lens unit ₇ For the center thickness of the seventh lens on the optical axis of the lens unit, ET ₃ For the edge thickness of the third lens, ET ₅ For the edge thickness of the fifth lens, ET ₆ Is the edge thickness of the sixth lens.

Therefore, the structural distribution of the second lens to the seventh lens can be ensured to be uniform, the steep degree of the light in the propagation direction in the lens unit is slowed down, the molding of the second lens to the seventh lens is facilitated, and meanwhile, the problems of low illumination of a lens assembly, poor sensitivity of the lens and the like are greatly improved.

In some alternative embodiments, the fifth lens and the sixth lens satisfy the following conditional expression: f is more than or equal to 0.89% ₅ /f ₆ |≤1.33；

Wherein f ₅ F is the focal length of the fifth lens ₆ Is the focal length of the sixth lens.

This enables the focal length f of the fifth lens ₅ Focal length f with sixth lens ₆ And the lens assembly is close to the lens assembly, so that light can be smoothly transited, the tolerance sensitivity degree of the lens assembly is reduced, and the uniform molding of the fifth lens and the sixth lens is ensured.

In some alternative embodiments, the first lens has positive or negative optical power, the second lens has negative optical power, the third lens has positive optical power, the fourth lens has positive optical power, the fifth lens has positive optical power, the sixth lens has negative optical power, the seventh lens has positive optical power, and the eighth lens has negative optical power.

In this way, the propagation angle of the whole light can be changed by limiting the focal power in each lens, so that the structure of the lens unit can be more diversified while the image plane of the lens unit is imaged.

A second aspect of an embodiment of the present application provides an image capturing module, including a module body and a lens assembly according to any one of the above, where the lens assembly is located in the module body.

According to the embodiment of the application, through the arrangement of the lens assembly in the camera module, miniaturization of the camera module is facilitated, super-strong resolving power of the lens assembly is ensured, the effect of continuous change of shooting vision can be realized, and shooting experience of a user is improved.

In some alternative embodiments, the module body includes a plurality of driving devices disposed corresponding to each lens unit in the lens assembly, the lens units being located within the corresponding driving devices, the driving devices being configured to be capable of driving at least one of the first lens group and the second lens group of the lens units to move so as to tilt the first lens group with respect to the second lens group.

Through the arrangement of a plurality of driving devices, at least one of the first lens group and the second lens group in the lens unit can be driven by the driving devices to move, the first lens group can incline to the second lens group, so that the inclinable angle of the first lens group to the second lens can be adjusted, the effect of continuously changing the shooting visual field is realized, and the shooting experience of a user is improved.

In some optional embodiments, the tiltable angle of the first lens group relative to the second lens group is greater than or equal to 0 ° and less than or equal to 9.2 °, so as to increase the field angle of the lens assembly, and receive the light rays of the object with wider field of view, so that the objective of clear imaging is achieved, meanwhile, the extreme experience that the field of view of the lens assembly can be changed continuously and substantially can be further realized, and the shooting experience of the user is improved.

In some alternative embodiments, the module body includes an image sensor, and each lens unit in the lens assembly is arranged in a first plane, and corresponds to different areas of a light sensing surface of the image sensor, where the first plane is parallel to the light sensing surface.

Therefore, miniaturization of the lens assembly is realized, super-strong resolution of the lens assembly is ensured, and each lens unit in the lens assembly can image on the same image sensor so as to form a complete image.

In some alternative embodiments, the image sensor is located on the light exit side of the lens assembly.

This allows the light transmitted through each lens unit to be irradiated onto the image sensor for further imaging.

In some alternative embodiments, the module body further includes a diaphragm, and the diaphragm is located between the plurality of lenses of the first lens group along the optical axis direction of the lens unit in the lens assembly.

Through the setting of diaphragm like this, can adjust the intensity of the light that gets into in the lens unit to promote definition and luminance etc. that image, and then improve the imaging quality.

In some optional embodiments, the module body further includes an optical filter, and the optical filter is located on a side of the second lens group facing the image side along an optical axis direction of the lens unit in the lens assembly.

Through the arrangement of the optical filter, stray light which is unfavorable for imaging in the light transmitted through the lens unit can be filtered, and the imaging quality is improved.

A third aspect of the embodiment of the present application provides an electronic device, where the electronic device includes a housing and an image capturing module according to any one of the above embodiments, and the image capturing module is located in an accommodating space of the housing.

Through the setting of the module of making a video recording in electronic equipment like this, when realizing electronic equipment's shooting function, when promoting the quality of shooing, can also promote user's shooting experience.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 2 is a schematic diagram illustrating partial disassembly of an electronic device according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a camera module provided in the related art;

fig. 4 is a schematic layout diagram of a plurality of lens units in a lens assembly according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a lens unit according to an embodiment of the present application;

FIG. 6 is a schematic view of the lens unit of FIG. 5 in a first view;

FIG. 7 is a schematic view of the lens unit of FIG. 7 in a second view;

fig. 8 is a schematic structural diagram of a camera module according to an embodiment of the present application;

FIG. 9 is an exploded view of a camera module according to an embodiment of the present application;

FIG. 10 is a schematic diagram of the field curvature of a light ray having a wavelength of 546nm passing through the lens unit of FIG. 5;

FIG. 11 is a schematic view of the distortion of light having a wavelength of 546nm passing through the lens unit of FIG. 5;

FIG. 12 is a schematic diagram of chromatic aberration of a plurality of wavelengths of light passing through the lens unit of FIG. 5;

FIG. 13 is a schematic view of another lens unit according to an embodiment of the present application;

FIG. 14 is a schematic diagram showing the field curvature of a light ray having a wavelength of 546nm passing through the lens unit of FIG. 13;

FIG. 15 is a schematic view of the distortion of light having a wavelength of 546nm passing through the lens unit of FIG. 13;

FIG. 16 is a schematic diagram of chromatic aberration of a plurality of wavelengths of light passing through the lens unit of FIG. 13.

Reference numerals illustrate:

100-an electronic device; 1-a display screen; 2-a housing; 21-a middle frame; 211-frame; 212-middle plate; 22-a rear cover; 221-a lens cover plate; 3-a camera module;

31-a lens assembly; 311-a lens unit; 311 a-a first lens group; 311 b-a second lens group; 3111-a first lens; 3112-a second lens; 3113-a third lens; 3114-fourth lens; 3115-a fifth lens; 3116-sixth lens; 3117-seventh lens; 3118-eighth lens;

32-an optical filter; 33-image plane; 34-diaphragm; 36-a drive device; 37-an image sensor; 38-lens;

4-a first plane; 5-a circuit board; 200-a first object; 300-second object.

Detailed Description

The terminology used in the description of the embodiments of the application herein is for the purpose of describing particular embodiments of the application only and is not intended to be limiting of the application.

For ease of understanding, related art terms related to the embodiments of the present application are explained and explained first.

The target surface is the photosensitive surface of the image sensor, and the larger the target surface is, the larger the light sensing amount of the image sensor is, and the larger the imaging image height is.

Focal length, also known as focal length, is a measure of the concentration or emission of light in an optical system, and refers to the perpendicular distance from the optical center of a lens or lens group to the focal plane when a scene at infinity is brought into a clear image at the focal plane by the lens or lens group. The distance from the center of the lens (lens assembly) to the image plane can be understood from a practical point of view.

The optical axis refers to a straight line passing through the center of each lens in the lens assembly.

The optical power characterizes the refractive power of the lens to an incident parallel beam, also known as refractive power.

Positive focal power indicates that the lens has a positive focal length and has the effect of converging light.

Negative focal power means that the lens has a negative focal length and has the effect of diverging light.

The angle of View (FOV) is defined as the angle between two edges of the maximum range of the lens assembly, which is the angle between the two edges of the lens assembly and the object image of the subject.

And the object side is the object side by taking the lens assembly as a boundary, the side where the shot object is located is the object side, and one surface of the lens in the lens assembly, which faces the object side, is the object side surface of the lens.

The image side is defined by a lens assembly, the side where the image of the shot object is located is the image side, and the surface of the lens in the lens assembly, which faces the image side, is the image side of the lens.

The Image Height (IH) is also called Image height, and refers to the total Image height of an Image formed by the lens assembly.

The optical effective diameter refers to the effective diameter of the lens, and the greater the effective diameter of the lens, the more clear and detailed things can be easily observed.

The effective aperture refers to an effective circular hole diameter generated by the iris (blade group) at the center of the lens assembly when the iris is adjusted in the camera module.

The center radius of curvature refers to the radius of curvature of the center region, and the radius of curvature refers to the inverse of the curvature. The radius of curvature is primarily used to describe the degree to which a curve curves somewhere on the curve. For example, the degree of curvature is the same at each location on the circle so that the radius of curvature is the radius of the circle; the straight line is not curved, and the radius of the circle tangent to the straight line at this point may be arbitrarily large, so the curvature is 0.

Abbe number, also called the Abbe's number, refers to the ratio of the difference in refractive index of an optical material at different wavelengths, and indicates the degree of dispersion of the material.

The chromatic aberration of the vertical axis is called as the chromatic aberration of the vertical axis, and the chromatic aberration of the vertical axis is called as the chromatic aberration of magnification, wherein the heights of principal rays of chromatic light with different off-axis points are different from the height of a Gaussian image plane. The vertical axis chromatic aberration causes the edge of the object image to be colored, and has great influence on the image quality.

Aberration, known as chromatic aberration, refers to the deviation from the ideal state of gaussian optics (first order approximation theory or paraxial rays) in an actual optical system, where the result from non-paraxial ray tracing does not coincide with the result from paraxial ray tracing. Aberrations are mainly classified into spherical aberration, coma, curvature of field, astigmatism, distortion, chromatic aberration, and wave aberration.

Defocus refers to a phenomenon in which a focal point is not blurred by the object.

Field curvature, also known as field curvature. On a flat image plane, the definition of the image changes from the center to the outside, focusing to form an arc, called field curvature. When the lens is curved, the intersection point of the whole light beam does not coincide with the ideal image point, and although a clear image point can be obtained at each specific point, the whole image plane is a curved surface. Thus, the whole image surface cannot be seen at the same time during microscopic examination, and difficulty is caused to observation and shooting.

Distortion, also referred to as distortion, generally refers to the degree of distortion of an image of an object by a lens assembly relative to the object itself. The height of the intersection point of the chief rays of different fields of view with the Gaussian imaging surface after passing through the lens assembly is not equal to the ideal height, and the difference between the chief rays of different fields of view is distortion.

The embodiment of the application provides an electronic device, which may include, but is not limited to, electronic devices with shooting functions, such as a mobile phone, a tablet computer (i.e., pad), a Virtual Reality (VR) device, a notebook computer, a personal computer (personal computer, PC), an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a handheld computer, an intelligent wearable device, and the like.

The structure of the electronic device according to the embodiment of the present application is further described below by taking a mobile phone as an example.

Fig. 1 illustrates a schematic structural diagram of an electronic device, and fig. 2 illustrates a partially disassembled schematic diagram of an electronic device. Referring to fig. 1 and 2, an electronic device 100 provided in an embodiment of the present application may include a housing 2, where the housing 2 includes a middle frame 21 and a rear cover 22, and the middle frame 21 includes the rear cover 22 connected to one side of the middle frame 21, and forms the housing 2 of the electronic device 100 with the middle frame 21, so as to provide a structural frame for the electronic device 100.

With continued reference to fig. 2 and in conjunction with fig. 1, in some embodiments, center frame 21 includes a middle plate 212 and a rim 211 that are coupled to each other, rim 211 being disposed around a peripheral edge of middle plate 212 and forming, with middle plate 212, center frame 21. The frame 211 is a square ring structure formed by connecting a plurality of side frames 211 (not labeled in the figure) end to end.

Referring to fig. 2, in some embodiments, when the electronic device 100 has a display function, the electronic device 100 further includes a display screen 1, where the display screen 1 is mounted on a side of the frame 211 opposite to the rear cover 22, and the rear cover 22 is disposed on a side of the middle frame 21 and encloses a housing space (not illustrated in the drawings) of the electronic device 100 together with the middle frame 21 and the rear cover 22. The side of the display screen 1 forms the front of the electronic device 100, and the side of the rear cover 22 forms the back of the electronic device 100.

As shown in fig. 2, the circuit board 5 of the electronic device 100 may be further disposed in the accommodating space, and the display screen 1 is electrically connected to the motherboard, so that the display screen 1 may implement display or operation functions. In some embodiments, the accommodating space may further be provided with a camera module 3 of the electronic device 100, where the camera module 3 is electrically connected with the circuit board 5, so that when a user inputs a shooting instruction, the camera module 3 can be controlled by the circuit board 5 to shoot an image, thereby realizing a shooting function of the electronic device 100.

Alternatively, in some embodiments, the accommodating space may further include a battery, a microphone, a speaker, an earpiece, and other components of the electronic device 100. In the present application, the kind and number of the structural members accommodated in the accommodation space are not further limited.

Fig. 2 shows that an imaging module 3 is provided in the electronic device. It should be noted that, in practical applications, the number of the camera modules 3 is not limited to one, and the number of the camera modules 3 may be two or more. To enhance the photographing performance of the electronic device 100, a plurality of (e.g., three, four, or five) camera modules 3 are typically disposed in the electronic device 100. Some of the camera modules 3 may be disposed on a side of the middle frame 21 facing the display screen 1, so as to form a front camera module. Other camera modules 3 may be disposed on a side of the middle frame 21 facing the rear cover 22 to form a rear camera module. In the present application, the specific positions of the front camera module and the rear camera module in the electronic device 100 are not further limited.

Fig. 3 is a schematic structural diagram of a camera module provided in the related art, so as to facilitate understanding of the structure of the camera module. Referring to fig. 3, currently, the camera module 3a in the electronic device generally includes a module body (not shown in the drawing) and a lens 38, and the module body generally includes a driving device 36a, an optical filter 32a and an image sensor 37a. The lens 38 of the related art is typically composed of one or more laminated lenses (e.g., lenses). A part of the lens 38 is mounted in the driving device 36a, and the other part is exposed outside the driving device 36a, so that the lens 38 can be driven to move to realize zooming, focusing or optical anti-shake functions of the image pickup module 3a while the assembly of the lens 38 in the image pickup module 3a is realized by the driving device 36 a.

The filter 32a is typically an optical filter, and the filter 32a and the image sensor 37a are disposed in this order on the light-emitting side of the lens 38. The image sensor 37 is typically electrically connected to a circuit board of the electronic device. The lens cover 221 on the light-transmitting rear cover 22 outside the electronic device 100 enters the lens 38, and after being emitted through the lens 38, can sequentially pass through the optical filter 32a and the image sensor 37a, and after being processed by the image sensor 37a, forms an image, thereby realizing the shooting function of the shooting module 3 a.

With the continuous development and wide application of the camera module 3a, the pursuit of experience of people on electronic devices is also more and more tended to be maximized, and the pursuit of minimizing the size of the camera module 3a and comprehensively shooting scenes thereof is included.

In order to match the image sensor 37a with a large target surface and have good imaging quality, in the design of the lens 38, aberration is usually better corrected by increasing the number of lenses in the lens 38. However, the increase of the number of lenses directly causes the adverse phenomena of the lens 38, such as heavy overall thickness of the electronic device, and the like, and cannot satisfy the extremely-used experience of people for thinning the electronic device.

It should be noted that, the target surface size of the large target surface image sensor 37a is not further limited in the present application, and specific reference may be made to the description of the large target surface image sensor 37a in the prior art.

In order to overcome the above-mentioned drawbacks of the electronic device, such as the increased lens height, and the resulting heavy overall thickness, and the inability to satisfy the extreme use experience of people in thinning the electronic device, a lens 38 with a smaller size in the prior art is proposed in the related art. However, although the height of the lens 38 is reduced, the above-mentioned drawbacks such as the heavy overall weight of the electronic device and the inability to satisfy the extremely-used experience of people for the light and thin electronic device are overcome, the high-pixel image sensor 37a is generally required to be matched with a large-size lens 38, which results in that the lens 38 with a smaller size in the prior art cannot be matched with the high-pixel image sensor 37a, and the reduction capability of the lens 38 on the high-frequency information of the photographed object is poor. The ability of the lens 38 to restore high frequency information of the photographic subject is generally referred to as the resolving power of the lens 38, and therefore, the resolving power of the lens 38 may be poor.

The high-frequency information of the photographed object generally refers to a region of the photographed object where textures are denser.

It should be noted that the pixel level of the high-pixel image sensor 37a is not further limited in the present application, and specific reference may be made to the description of the high-pixel image sensor 37a in the prior art.

How to miniaturize the lens 38 and make the lens 38 have a super resolution has become a technical problem to be solved.

Therefore, the embodiment of the application provides the lens assembly, which can realize the effect of continuously changing the shooting visual field and improve the shooting experience of a user while ensuring that the lens assembly has super-strong resolving power while realizing the miniaturization of the lens assembly.

The structure of the lens assembly of the present application will be further described with reference to the accompanying drawings.

Fig. 4 is a schematic diagram illustrating an arrangement of lens units in a lens assembly. Referring to fig. 3, the lens assembly 31 provided by the present application includes a plurality of lens units 311, wherein the plurality of lens units 311 are arranged in a first plane 4 parallel to an image plane 33 of the lens units 311 and configured to be imaged by the same image sensor. The image plane 33 can be understood as the image plane or imaging plane of the image sensor.

Compared with the mode that the plurality of lens units 311 are stacked in the optical axis direction of the lens units 311, the application ensures that the pixels of the lens assembly 31 are not influenced, and simultaneously can fully reduce the height of the lens assembly 31 so as to realize miniaturization of the lens assembly 31, and can form the lens assembly 31 with an ultra-large image height so as to match with an image sensor with high pixels and correct aberration, thereby improving the resolution of the lens assembly 31 when the electronic equipment 100 is developed towards the thinning direction.

The direction in which the height of the lens assembly 31 is located may be understood as the thickness direction of the electronic device 100. The thickness direction of the electronic device 100 may refer to the Z direction illustrated in fig. 2.

Each lens unit 311 in the lens assembly 31 may take a photograph corresponding to a different area of the same photographed object, and splice the different areas of the photographed object by the lens units 311 through the same image sensor, so as to form a complete image of the photographed object on the same image sensor.

Since the lens assembly 31 of the present application is formed by splicing the plurality of lens units 311 arranged in the first plane 4, the lens assembly 31 of the present application may also be referred to as an all-in-one lens assembly 31.

With continued reference to fig. 4, in some embodiments, four lens units 311 may be included in the lens assembly 31, and the four lens units 311 may be arranged in the first plane 4 as shown in fig. 4. Alternatively, in some embodiments, a plurality (e.g., nine, etc.) of lens units 311 may be further included in the lens assembly 31, and the plurality of lens units 311 may be arranged in the first plane 4 and imaged by the same image sensor 37. In the present application, the number of lens units 311 in the lens assembly 31 is not further limited.

With continued reference to fig. 4, the plurality of lens units 311 may be uniformly arranged in the first plane 4, so as to ensure that the plurality of lens units 311 may cover the same image sensor and form an oversized image-height lens assembly 31 by imaging with the same image sensor.

Fig. 5 illustrates a schematic structure of the lens unit 311 so as to facilitate the observation of the structure of the lens unit 311.

Referring to fig. 5, each lens unit 311 includes a plurality of lenses sequentially arranged from an object side to an image side along an optical axis direction of the lens unit 311, so that the lens unit 31 is miniaturized to form one lens unit 31 with an ultra-large image height, and the lens unit 31 is matched with an image sensor with high pixels to correct aberration by arranging the plurality of lenses in the lens unit 311, thereby improving the resolution of the lens unit 31.

Wherein the optic may include, but is not limited to, a lens. Each lens may be a plastic lens or a glass lens. In the present application, the kind and number of lenses are not further limited.

With continued reference to fig. 5, the plurality of lenses respectively form a first lens group 311a and a second lens group 311b. Wherein the first lens group 311a is located at a side of the second lens group 311b facing the object side, and is configured to be tiltable with respect to the second lens group 311b to change the angle of view of the lens assembly 31. According to the application, the propagation angle of the whole light in the lens unit 311 is changed by adjusting the relative inclination angle between the first lens group 311a and the second lens group 311b, so that the lens unit 311 can accommodate the light of a wider-view object, the height of the lens assembly 31 is further reduced sufficiently, the imaging view range of the lens assembly 31 can be enlarged while the ultra-strong resolution of the lens assembly 31 is ensured, the extreme experience that the shooting view can be changed continuously is realized, richer image information is provided, the visual impact sense is excellent, and the shooting experience of a user is improved.

In the adjustment of the relative tilt angle between the first lens group 311a and the second lens group 311b, the angle of the first lens group 311a with respect to the second lens group 311b may be adjusted only by rotation or the like, so as to tilt the first lens group 311a with respect to the second lens group 311b, thereby changing the angle of view of the lens assembly 31.

Alternatively, in some embodiments, in the adjustment of the relative tilt angle between the first lens group 311a and the second lens group 311b, the angle of the second lens group 311b with respect to the second lens group 311b may be adjusted by merely rotating or the like to tilt the first lens group 311a with respect to the second lens group 311b to change the field angle of the lens assembly 31.

Alternatively, in other embodiments, the two angle adjustment manners may be combined, so that the first lens group 311a is inclined with respect to the second lens group 311b to change the field angle of the lens assembly 31. In the present application, the manner in which the first lens group 311a is tilted with respect to the second lens group 311b is not further limited.

Since the first lens group 311a is located at a side of the second lens group 311b facing the object side, for convenience of adjustment, adjustment may be performed only with respect to the first lens group 311a to tilt the first lens group 311a with respect to the second lens group 311b, thereby changing the angle of view of the lens assembly 31.

In the adjustment of the relative inclination angle between the first lens group 311a and the second lens group 311b, the incident light is mainly relied on, and the position of the second lens group 311b relative to the image plane 33 of the lens unit 311 is relatively fixed, so that the purpose of clear imaging can be achieved while changing the angle of view of the lens assembly 31.

Wherein the plurality of lens units 311 have the same structure so as to realize that the relative inclination angles between the first lens group 311a and the second lens group 311b of each lens unit 311 in the lens assembly 31 are adjustable, so as to increase the angle of view of the lens assembly 31 and also ensure the uniformity of the lens assembly 31 in the height direction.

With continued reference to fig. 5, the optical axes of the first lens group 311a and the second lens group 311b always intersect to ensure continuity of the optical axes of the lens assembly 31 when the first lens group 311a is tilted with respect to the second lens group 311 b.

Taking the rotation of the first lens group 311a relative to the second lens group 311b as an example, in order to ensure that the optical axis of the first lens group 311a and the optical axis of the second lens group 311b always intersect, the first lens group 311a may rotate about the center (not shown) of the lens adjacent to the second lens group 311b in the first lens group 311a during rotation relative to the second lens group 311b, thereby ensuring that the optical axis of the first lens group 311a and the optical axis of the second lens group 311b always intersect during rotation and after rotation.

Since the optical axis of the first lens group 311a and the optical axis of the second lens group 311b form the optical axis of the lens unit 311, when the first lens group 311a is tilted with respect to the second lens group 311b, the optical axis of the first lens group 311a is changed, and the optical axis of the lens unit 311 is also changed, thereby achieving the shift axis design of the lens unit 311. Therefore, the lens assembly 31 of the present application may also be referred to as a movable-axis lens assembly 31.

Wherein, the tiltable angle of the optical axis of the first lens group 311a with respect to the optical axis of the second lens group 311b is greater than or equal to 0 ° and less than or equal to 9.2 °. The tiltable angle may refer to the included angle a in fig. 5. That is, when the included angle a is equal to 0 °, the optical axes of the first lens group 311a are coincident with respect to the optical axes of the second lens group 311b, and when the included angle a is greater than 0 ° and less than or equal to 9.2 °, the optical axes of the first lens group 311a are disposed obliquely with respect to the optical axes of the second lens group 311 b. Therefore, through limiting the included angle a, when the first lens group 311a is adjusted within the range of the tiltable angle relative to the second lens group 311b, the view angle of the lens assembly 31 can be increased, so that the lens assembly is beneficial to containing the light rays of objects with wider fields of view, and the extreme experience that the field of view of the lens assembly 31 can be changed continuously and greatly can be further realized while the purpose of clear imaging is achieved, and the shooting experience of a user is improved.

To facilitate understanding that the first lens group 311a is inclined with respect to the second lens group 311b to change the field of view, fig. 6 illustrates a schematic structure of the lens unit 311 in fig. 5 in a first photographing view, in which the included angle a is equal to 0 °. Fig. 6 illustrates a schematic structural diagram of the lens unit 311 in fig. 4 in a second photographing view, where the included angle a is greater than 0 ° and less than or equal to 9.2 °.

Referring to fig. 6, when the included angle a is equal to 0 °, the lens unit 311 may receive the light on the first object 200 corresponding to the first lens group 311a due to the coincidence of the optical axis of the first lens group 311a with respect to the optical axis of the second lens group 311b, and the first object 200 is located at the first position.

Referring to fig. 7, in the photographing process, after the optical axis of the first lens group 311a is inclined with respect to the optical axis of the second lens group 311b, the lens unit 311 may further receive the light on the second object 300 corresponding to the inclined first lens group 311a, and the second object 300 is located at the second position. The first position and the second position determine the adjustable range of the angle of view during photographing of the lens assembly 31.

Therefore, in the shooting process, the relative inclination of the first lens group 311a and the second lens group 311b can be changed by adjusting the included angle a, so as to adjust the view angle of the lens assembly 31, and realize the effect of changing the view angle of the lens assembly 31, so that the lens unit 311 can receive the light of the first object 200 at the first position and the light of the second object 300 at the second position, thereby increasing the view angle of the lens assembly 31, receiving the light of the object with wider view, and realizing the extreme experience that the view range of the lens assembly 31 can be changed continuously.

When the included angle a is greater than or equal to 0 degrees and less than or equal to 9.2 degrees, the field angle of view of the lens assembly 31 can be greater than or equal to 72 degrees and less than or equal to 108 degrees, so that the lens assembly 31 has wider field of view, richer graphic information can be improved, excellent visual impact is achieved, and shooting experience of a user is improved.

With continued reference to fig. 5, each lens has optical power such that the propagation angle of the overall light ray is changed by adjusting the optical power of each lens to facilitate imaging at the image plane 33 of the lens unit 311.

With continued reference to fig. 5, the first lens group 311a includes at least a first lens 3111, a second lens 3112, a third lens 3113 and a fourth lens 3114 disposed sequentially from an object side to an image side. The second lens group 311b includes at least a fifth lens 3115, a sixth lens 3116, a seventh lens 3117, and an eighth lens 3118 disposed in order along the object side to the image side.

In some embodiments, without limitation on the size of the lens unit 311, the lens unit 311 may further include more (e.g., 10 or the like) lenses, and the greater the number of lenses in the lens unit 311, the better the effect of correcting aberrations, and the stronger the resolution of the lens assembly 31. Wherein the number of lenses in the first lens group 311a and the second lens group 311b may be specifically the same or different. In the present application, the number of lenses in the lens unit 311 can be appropriately increased as long as miniaturization of the lens assembly 31 is not affected. The number of lenses in the lens unit 311 and the distribution of lenses in the first lens group 311a and the second lens group 311b are not further limited in the present application.

According to the application, due to the arrangement of at least eight lenses in each lens unit 311, as each lens unit 311 is spliced in the first plane 4, a lens assembly 31 with an ultra-large image height can be formed, the height of the lens assembly 31 is reduced, the miniaturization of the lens assembly 31 is realized, and meanwhile, the lens assembly 31 can be matched with the image sensor 37 with high pixels, so that the aberration is corrected, and the resolution of the lens assembly 31 is improved.

The structure of the lens assembly 31 of the present application will be further described below by taking eight lenses as an example.

With continued reference to fig. 5, the lens unit 311 and the first lens 3111 satisfy the conditional expression: 126.80 f is not more than ₁ /f≤17.29；

Where f is the focal length of the lens unit 311, f ₁ Is the focal length of the first lens 3111.

This enables the focal length f of the first lens 3111 ₁ Compared with the focal length f of the lens unit 311, the lens unit 311 has a larger adjustable range, can sufficiently correct the light trend at the front end of the lens unit 311 (the end of the lens unit 311 provided with the first lens 3111), is more beneficial to the smoothness of the light entering the system, and can also improve the optimization space of aberration, the resolution of the lens assembly 31 and ensure the imaging quality of the lens.

The front end of the lens unit 311 may also be referred to as a head of the lens unit 311.

In some embodiments, referring to fig. 5, the size of the eighth lens 3118 satisfies the condition:

1.67≤D ₈ /CT ₈ not more than 11.78; wherein D is ₈ CT for the center thickness of the eighth lens 3118 on the optical axis of the lens unit 311 ₈ Is the optically effective diameter of the eighth lens 3118.

In this way, the eighth lens 3118 can obtain an ultra-small radius-thickness ratio, so that the fluid can have high fluidity when the eighth lens 3118 is injection molded, the risk of wire outgoing injection molding of the bonding wire is greatly reduced, the actual molding of the eighth lens 3118 is more in accordance with the design specification, the correction of aberration of the lens unit 311 is ensured, and the resolution and high-quality imaging capability of the lens unit 311 are improved.

In some embodiments, referring to fig. 5, the lens unit 311 and the eighth lens 3118 satisfy the conditional expression: BFL/f is more than or equal to 0.24 and less than or equal to 0.29;

where BFL is the distance from the image side of the eighth lens 3118 to the imaging plane 33 of the lens unit 311 along the optical axis of the lens unit 311.

It should be noted that, when the eighth lens 3118 is the last lens in the lens unit 311 that is sequentially arranged from the object side to the image side along the optical axis direction of the lens unit 311, the BFL/f ratio may be understood as the back focal length of the lens unit 311, and when the back focal length meets the above condition, the telescopic capability of the lens assembly 31 may be enhanced, and the distance between the lens assembly 31 and the image plane 33 may be extremely reduced, so as to further reduce the height of the lens assembly 31 and achieve miniaturization of the lens assembly 31.

Similarly, referring to fig. 5, when the eighth lens 3118 is the last lens in the lens unit 311 that is sequentially arranged from the object side to the image side in the optical axis direction of the lens unit 311, the lens unit 311 and the eighth lens 3118 satisfy the conditional expression: the ratio of YI/IH is less than or equal to 0.99;

where Yl is the effective aperture of the image side surface of the eighth lens 3118, and IH is the half height of the lens unit 311.

In this way, the size of the lens assembly 31 on the plane perpendicular to the optical axis of the lens unit 311 can be effectively compressed, the axial distance between the lens assembly 31 and a photosensitive element (such as an image sensor) can be increased, the target surface size of the image sensor can be increased, and the resolution of the lens assembly 31 on the details of an image pickup object can be improved.

It should be noted that the plane perpendicular to the optical axis direction of the lens unit 311 may be understood as the dimension of the eighth lens 3118 on the X-Y plane of the electronic device 100. As shown in fig. 1 and 2, the X-Y plane is a plane formed by the length direction and the width direction of the electronic device 100, and is parallel to a display surface (not shown) of the display screen 1.

In some embodiments, referring to fig. 5, the first lens 3111 and the second lens 3112 satisfy the conditional expression: maxY ₁₂ /IH≤0.62；

Wherein MaxY ₁₂ Is the maximum clear aperture of the first lens 3111 through the second lens 3112.

Therefore, the different adaptation of the front end size of the lens assembly 31 can be realized, the light quantity of the system is ensured, the detail information of an imaging object is enriched, the resolution capability of the module to the details is improved, the size of the front end of the lens assembly 31 on the X-Y plane of the electronic device 100 can be reduced, the stronger resolution capability of the lens assembly 31 is ensured, and the miniaturization of the lens assembly 31 can be further realized.

In some embodiments, referring to fig. 5, the dimensions of the sixth lens 3116 satisfy the condition:

-1.46≤(R ₁₁ +R ₁₂ )/(R ₁₁ -R ₁₂₎ ≤-1.36；

wherein R is ₁₁ Is the center radius of curvature, R, of the object side of the sixth lens 3116 ₁₂ Is the center radius of curvature of the image side of the sixth lens 3116.

Thus at R ₁₁ And R is ₁₂ When the above conditional expression is satisfied, the values of the radii of curvature of the object side surface and the image side surface of the sixth lens element can be made to be close, so that the surface type transition of the sixth lens element 3116 can be ensured to be uniform, the sensitivity of the sixth lens element to tolerance such as molding and assembling is reduced, and the actual production yield of the whole lens element is improved.

In some embodiments, referring to fig. 5, the dimensions of the plurality of lenses satisfy the condition:

1.87≤(CT ₂ +CT ₄ +CT ₇ )/(ET ₃ +ET ₅ +ET ₆ )≤2.00；

Wherein CT ₂ CT for the center thickness of the second lens 3112 on the optical axis of the lens unit 311 ₄ CT for the center thickness of the fourth lens 3114 on the optical axis of the lens unit 311 ₇ For the center thickness of the seventh lens 3117 on the optical axis of the lens unit 311, ET ₃ For the edge thickness of the third lens 3113, ET ₅ For the edge thickness of the fifth lens 3115, ET ₆ Is the rim thickness of the sixth lens 3116.

Since the second lens 3112 through seventh lens 3117 are relatively sensitive to the first lens 3111 and eighth lens 3118, when CT ₂ 、CT ₄ 、CT ₇ 、ET ₃ 、ET ₅ And ET ₆ When the above conditional expressions are satisfied, the structural distribution of the second lens 3112 to the seventh lens 3117 can be ensured to be uniform, the steepness of the light propagation direction in the lens unit 311 is slowed, the molding of the second lens 3112 to the seventh lens 3117 is facilitated, and meanwhile, the problems of low illuminance, poor sensitivity of the lens assembly 31 and the like are greatly improved.

In some embodiments, referring to fig. 5, the fifth lens 3115 and the sixth lens 3116 satisfy the conditional expression: f is more than or equal to 0.89% ₅ /f ₆ |≤1.33；

Wherein f ₅ F is the focal length of the fifth lens 3115 ₆ Is the focal length of the sixth lens 3116.

Since the fifth lens 3115 and the sixth lens 3116 are more sensitive lenses in the lens unit 311 with eight lenses, when the focal length f of the fifth lens 3115 ₅ And focal length f of sixth lens 3116 ₆ When the above conditional expression is satisfied, the focal length f of the fifth lens 3115 can be set ₅ And focal length f of sixth lens 3116 ₆ Near, the complementary profiles of the fifth lens 3115 and the sixth lens 3116 can be ensured, so that the incident angle of the incident light beam projected onto the subsequent lenses (e.g., the seventh lens 3117 and the eighth lens 3118) can be effectively buffered, the light beam can be smoothly transited, the tolerance sensitivity of the lens assembly 31 can be reduced, and the uniform molding of the fifth lens 3115 and the sixth lens 3116 can be ensured.

Where the second lens 3112 has negative power, the third lens 3113 can have positive power, the fourth lens 3114 has positive power, the fifth lens 3115 has positive power, the sixth lens 3116 has negative power, the seventh lens 3117 has positive power, and the eighth lens 3118 has negative power, in some embodiments the first lens 3111 can have positive power, or in other embodiments the first lens 3111 can also have negative power.

In this way, by defining the optical power in each lens, the propagation angle of the entire light can be changed, so that the structure of the lens unit 311 can be more diversified while the image plane 33 of the lens unit 311 is imaged.

Thus, by defining the optical power in each lens, the propagation angle of the entire light can be changed to facilitate imaging on the image plane 33 of the lens unit 311.

In some embodiments, each lens in the lens unit 311 may be aspherical. Alternatively, in other embodiments, each lens in the lens unit 311 may be spherical. In the present application, the surface shape of each lens in the lens unit 311 is not further limited.

Fig. 8 and fig. 9 respectively illustrate a schematic structural diagram and an exploded view of an image capturing module according to an embodiment of the present application.

On the basis of the above, the embodiment of the present application further provides an image capturing module 3, and referring to fig. 8 and 9, the image capturing module 3 of the present application also includes a module body (not shown in the drawings), where the module body in the image capturing module 3 includes a driving device 36, so as to support the lens assembly 31 and simultaneously drive at least part of the movement of the lens unit 311, and enable the first lens group 311a (not shown in the drawings) to tilt relative to the second lens group 311b (not shown in the drawings).

In addition, the camera module 3 of the present application further includes the lens assembly 31, and the lens assembly 31 can replace the lens of the current camera module, and is located in the module body of the present application, so as to form the camera module 3 with the module body of the present application.

Due to the arrangement of the lens assembly 31 in the camera module 3, miniaturization of the camera module 3 is facilitated, super-strong resolving power of the lens assembly 31 is ensured, continuous change of the shooting field of view of the camera module can be achieved, and shooting experience of a user is improved.

Referring to fig. 8 and 9, the module body of the present application includes a plurality of driving devices 36, and the plurality of driving devices 36 are disposed corresponding to each lens unit 311 in the lens assembly 31. That is, the number of driving devices 36 is equal to and corresponds to the number of lens units 311 in the lens assembly 31 one by one, so that the movement of the lens units 311 within the driving devices 36 is controlled by the driving devices 36 corresponding to the respective lens units 311.

Specifically, with continued reference to fig. 8 and 9, the lens units 311 are located within corresponding drive devices 36, and the drive devices 36 are configured to be able to drive at least one of the first lens group 311a and the second lens group 311b in the lens units 311 to move so as to tilt the first lens group 311a with respect to the second lens group 311 b. Therefore, on the basis of realizing miniaturization of the camera module 3 and ensuring that the lens assembly 31 has super-strong resolution, at least one of the first lens group 311a and the second lens group 311b can be driven to move through the driving assembly, so that the first lens group 311a inclines relative to the second lens group 311b, the inclination angle of the first lens group 311a relative to the second lens 3112 is adjusted, the effect of continuously changing the shooting field of view can be realized, and the shooting experience of a user is improved.

Wherein the driving device 36 includes a driving housing (not shown) and a driving assembly (not shown) corresponding to at least one of the first lens group 311a and the second lens group 311b of the lens unit 311, so as to drive at least one of the first lens group 311a and the second lens group 311b of the lens unit 311 to move so as to tilt the first lens group 311a with respect to the second lens group 311 b.

In some embodiments, the first lens group 311a of the lens unit 311 may correspond to a driving component, and the driving component may be received at a periphery of the first lens group 311a, so that the camera module 3 is driven by the driving component to rotate the first lens group 311a around a center of a lens adjacent to the second lens group 311b in the first lens group 311a, so that the first lens group 311a is inclined to the second lens group 311b, the effect of continuously changing the shooting field of view is achieved, and the shooting experience of a user is improved while the optical axis of the first lens group 311a and the optical axis of the second lens group 311b are always intersected.

Or, in some embodiments, the second lens group 311b of the lens unit 311 may correspond to a driving component, and the driving component may be received on the periphery of the second lens group 311b, so that the image capturing module 3 is driven by the driving component to rotate the second lens group 311b around the center of the lens adjacent to the first lens group 311a in the second lens group 311b, so that the first lens group 311a inclines relative to the second lens group 311b, the effect of continuously changing the capturing field of view is achieved, and the capturing experience of the user is improved while the optical axis of the first lens group 311a and the optical axis of the second lens group 311b can be ensured to be always intersected.

Alternatively, in some embodiments, when there are two driving components in the driving device 36, the first lens group 311a and the second lens group 311b of the lens unit 311 each correspondingly receive one driving component.

Alternatively, in some embodiments, the module body of the present application may further include a driving device 36, where a plurality of driving components are disposed in the driving device 36. When the lens assembly 31 has a plurality of lens units 311, the plurality of lens units 311 are all located in the same driving device 36. At this time, the first lens group 311a and the second lens group 311b in the lens unit 311 may receive one driving assembly, respectively. Alternatively, in some embodiments, the first lens group 311a or the second lens group 311b in each lens unit 311 may also share one driving component.

It should be noted that the kind of the driving component and the corresponding structure may refer to the related description of the camera module in the existing electronic device, which is not further described herein.

Under the driving of the driving assembly, the tiltable angle of the first lens group 311a relative to the second lens group 311b is greater than or equal to 0 ° and less than or equal to 9.2 °, so as to increase the field angle of the lens assembly 31, and receive the light rays of the object with wider field of view, thereby achieving the purpose of clear imaging, and further realizing the extreme experience that the field of view of the lens assembly 31 can be changed continuously and substantially, and improving the shooting experience of the user.

Referring to fig. 9, the module body of the present application also includes an image sensor 37. In the present application, each lens unit 311 in the lens assembly 31 is arranged in the first plane 4 and corresponds to different areas of the photosurface of the image sensor 37, and the first plane 4 is parallel to the photosurface (not shown in the figure) of the image sensor 37, so that the miniaturization of the lens assembly 31 is realized, the lens assembly 31 has super resolution, and each lens unit 311 in the lens assembly 31 covers the photosurface of the image sensor 37 and forms an image on the same image sensor 37, so that a complete image is formed by stitching through the image sensor 37.

In the present application, the image sensor 37 is located at the light emitting side of the lens assembly 31, so that the light transmitted through each lens unit 311 can be irradiated onto the image sensor 37 to be imaged.

In some embodiments, referring to fig. 9 in combination with fig. 4, the module body of the present application may further include a filter 32. In the present application, the optical filter 32 is located on the side of the second lens group 311b facing the image side along the optical axis direction of the lens unit 311, so as to filter stray light in the light transmitted through the lens unit 311, which is unfavorable for imaging, by the arrangement of the optical filter 32, thereby improving the imaging quality.

In some embodiments of the application, the filter 32 and the image sensor 37 may be disposed outside the driving device 36. Alternatively, in other embodiments of the present application, when the plurality of lens units 311 are located in the same driving device 36, the optical filter 32 and the image sensor 37 may also be disposed inside the driving device 36, and the disposition position of the optical filter 32 and the image sensor 37 relative to the driving device 36 is not further limited by the present application.

In some embodiments, as shown in fig. 5, the module body lens unit 311 in the present application may further include a diaphragm 34, where the diaphragm 34 is located between the lenses of the first lens group 311a along the optical axis direction of the lens unit 311. In this case, as shown in fig. 4, the diaphragm 34 may be located on the object side surface of the third lens 3113 toward the second lens 3112 along the optical axis direction of the lens unit 311.

Alternatively, in some embodiments, the diaphragm 34 may also be located elsewhere within the mirror unit 311. For example, the diaphragm 34 may also be located on the object side surface of the second lens 3112 toward the side of the first lens 3111 in the optical axis direction of the lens unit 311. In the present application, the position of the diaphragm 34 within the mirror unit 311 is not further limited. Thus, by setting the diaphragm 34, the intensity of the light entering the lens unit 311 can be adjusted, so as to improve the definition, brightness, etc. of imaging, and further improve the imaging quality.

On the basis of the above, the electronic device 100 provided in the embodiment of the present application may include the above-mentioned camera module 3, where the camera module 3 is located in the accommodating space of the housing 2. Through the setting of the camera module 3 in the electronic equipment 100, the shooting function of the electronic equipment 100 is realized, the shooting quality is improved, and the shooting experience of a user can be improved.

It should be noted that, the setting of the camera module 3 in the electronic device 100 may refer to the related description in the foregoing, and will not be further described herein. The formation of the housing 2 and the accommodating space of the electronic device 100 may be referred to the above description, and is not further limited herein.

The structure and the number of performances of the lens unit 311 in the lens assembly 31 of the present application will be further described with reference to specific embodiments.

Example 1

With continued reference to fig. 5, the lens unit 311 includes 8 lenses, each of the 8 lenses is a lens, and each of the 8 lenses is a plastic lens formed of a plastic material. The 8 lenses include a first lens 3111, a second lens 3112, a third lens 3113, a fourth lens 3114, a fifth lens 3115, a sixth lens 3116, a seventh lens 3117, and an eighth lens 3118, which are disposed in order from the object side to the image side in the optical axis direction of the lens unit 311. The first lens 3111, the second lens 3112, the third lens 3113, and the fourth lens 3114 form a first lens group 311a, and the fifth lens 3115, the sixth lens 3116, the seventh lens 3117, and the eighth lens 3118 form a second lens group 311b.

The filter 32 of the image capturing module 3 is located on a side of the eighth lens 3118 facing the image plane 33 along the optical axis direction of the lens unit 311. The diaphragm 34 of the image capturing module 3 is located on a side of the object side surface of the third lens 3113 facing the second lens 3112 along the optical axis direction of the lens unit 311.

In this embodiment, the setting of the optical power of each lens is explained below.

The first lens 3111 has positive optical power, an object-side surface of the first lens 3111 is concave at a paraxial region, and an image-side surface of the first lens 3111 is convex at the paraxial region.

The second lens 3112 has negative optical power, the object-side surface of the second lens 3112 is convex at the paraxial region, and the image-side surface of the second lens 3112 is concave at the paraxial region.

The third lens 3113 has positive optical power, an object-side surface of the third lens 3113 is convex at a paraxial region, and an image-side surface of the third lens 3113 is convex at the paraxial region.

The fourth lens 3114 has positive optical power, the object-side surface of the fourth lens 3114 is concave at the paraxial region, and the image-side surface of the fourth lens 3114 is convex at the paraxial region.

The fifth lens element 3115 with positive refractive power has a convex object-side surface at the paraxial region and a convex image-side surface at the paraxial region of the fifth lens element 3115.

The sixth lens 3116 has negative optical power, the object-side surface of the sixth lens 3116 is concave at the paraxial region, and the image-side surface of the sixth lens 3116 is convex at the paraxial region.

The seventh lens 3117 has positive optical power, an object-side surface of the seventh lens 3117 is convex at the paraxial region, and an image-side surface of the seventh lens 3117 is convex at the paraxial region.

The eighth lens 3118 has negative optical power, an object-side surface of the eighth lens 3118 is convex at the paraxial region, and an image-side surface of the eighth lens 3118 is concave at the paraxial region.

Table 1 shows design parameters of the lens assembly of example 1

Wherein the meanings of the symbols in table 1 are as follows:

S ₁ : a diaphragm 34;

R ₁ : the center radius of curvature of the object side of the first lens 3111;

R ₂ : the central radius of curvature of the image side of the first lens 3111;

R ₃ : the center radius of curvature of the object side of the second lens 3112;

R ₄ : the center radius of curvature of the image side of the second lens 3112;

R ₅ : the center radius of curvature of the object side of the third lens 3113;

R ₆ : the center radius of curvature of the image side of the third lens 3113;

R ₇ : the center radius of curvature of the object side of the fourth lens 3114;

R ₈ : a center radius of curvature of an image side surface of the fourth lens sheet;

R ₉ : the center radius of curvature of the object side of the fifth lens 3115;

R ₁₀ : the center radius of curvature of the image side of the fifth lens 3115;

R ₁₁ : a center radius of curvature of the object side surface of the sixth lens sheet;

R ₁₂ : the center radius of curvature of the image side of the sixth lens 3116;

R ₁₃ : the center radius of curvature of the object side of the seventh lens 3117;

R ₁₄ : the center radius of curvature of the image side of the seventh lens 3117;

R ₁₅ : a center radius of curvature of the object side of the eighth lens 3118;

R ₁₆ : a central radius of curvature of the image side of the eighth lens 3118;

R ₁₇ : the center radius of curvature of the object side of the filter 32;

R ₁₈ : the center radius of curvature of the image side of the filter 32;

d: the on-axis thickness of the lenses, the on-axis distance between the lenses;

d ₀ : on-axis distance of diaphragm 34 to object side of first lens 3111

d ₁ : an on-axis thickness of the first lens 3111;

d ₂ : an on-axis distance from the image side of the first lens 3111 to the object side of the second lens 3112;

d ₃ : the on-axis thickness of the second lens 3112;

d ₄ : the on-axis distance of the image side of the second lens 3112 to the aperture 34;

CT: on-axis distance of diaphragm 34 to object side of third lens 3113

d ₅ : an on-axis thickness of the third lens 3113;

d ₆ : an on-axis distance from the image side of the third lens 3113 to the object side of the fourth lens 3114;

d ₇ : on-axis thickness of the fourth lens 3114;

d ₈ : an on-axis distance from the image side of the fourth lens 3114 to the object side of the fifth lens 3115;

d ₉ : on-axis thickness of the fifth lens 3115;

d ₁₀ : an on-axis distance from the image side of the fifth lens 3115 to the object side of the sixth lens 3116;

d ₁₁ : the on-axis thickness of the sixth lens 3116;

d ₁₂ : an on-axis distance from the image side of the sixth lens 3116 to the object side of the seventh lens 3117;

d ₁₃ : an on-axis thickness of the seventh lens 3117;

d ₁₄ : on-axis distance of the image side of seventh lens 3117 to the object side of eighth lens 3118

d ₁₅ : on-axis thickness of eighth lens 3118;

d ₁₆ : the on-axis distance of the image side of the eighth lens 3118 to the object side of the filter 32;

d ₁₇ : the on-axis thickness of the filter 32;

d ₁₈ : an on-axis distance from the image side surface of the optical filter 32 to the image plane 33;

nd: refractive index of d-line (d-line is green light with wavelength of 550 nm);

nd ₁ : refractive index of d-line of first lens 3111;

nd ₂ : refractive index of d-line of the second lens 3112;

nd ₃ : refractive index of d-line of the third lens 3113;

nd ₄ : refractive index of d-line of fourth lens 3114;

nd ₅ : refractive index of d-line of the fifth lens 3115;

nd ₇ : refractive index of d-line of sixth lens 3116;

nd ₈ : refractive index of d-line of seventh lens 3117;

nd ₉ : refractive index of d-line of eighth lens 3118;

ndg: refractive index of d-line of the filter 32;

vd: abbe number;

v ₁ : the abbe number of the first lens 3111;

v ₂ : the abbe number of the second lens 3112;

v ₃ : the abbe number of the third lens 3113;

v ₄ : the abbe number of the fourth lens 3114;

v ₅ : abbe number of the fifth lens 3115;

v ₆ : abbe number of the sixth lens 3116;

v ₇ : abbe number of the seventh lens 3117;

v ₈ : abbe number of the eighth lens 3118;

vg: abbe number of the filter 32.

Table 2 shows design parameters of the surface type of the lens assembly in example 1

The aspherical surfaces are used for the 8 lenses, and the aspherical surfaces shown in the following aspherical surface calculation formula can be used for the 8 lenses.

z＝(cr ² )/{1+[1(k+1)(c ² r ² )]1/2}+A ₄ r ⁴ +A ₆ r ⁶ +A ₈ r ⁸ +A ₁₀ r ¹⁰ +A ₁₂ r ¹² +A ₁₄ r ¹⁴ +A ₁₆ r ¹⁶ +A ₁₈ r ¹⁸ +A ₂₀ r ²⁰

Where k is the conic coefficient, A ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ The aspherical coefficient, c, is the curvature at the center of the optical surface, r is the perpendicular distance of the point on the aspherical curve from the optical axis, z is the aspherical depth.

In this embodiment, the values of the lens unit 311 and the values corresponding to the parameters specified in the conditional expression are shown in table 3.

Table 3 shows the performance parameters of the lens units of example 1

Wherein OBJ is the optical axis distance from the object to the object side of the first lens 3111 of one of the lens units 311 in the lens assembly 31, and the first, second and third microstructures respectively represent lens shapes of the lens assembly 31 under different photographing fields of view under different tilting degrees of the first lens group 311a and the second lens group 311b in the lens unit 311.

To verify the effect of the lens assembly 31, the present embodiment tests some performances of the lens assembly 31, and the test results are shown in fig. 10 to 12.

Fig. 10 shows a schematic diagram of the field curvature of a light ray having a wavelength of 546nm after passing through the lens unit 311 of example 1. The S-curve in fig. 10 is a field curvature in the sagittal direction, and the T-curve is a field curvature in the meridional direction. As can be seen from fig. 10, the S-curve and the T-curve are both close to the scale of the vertical axis in fig. 10, the field curvature of the lens assembly 31 in the sagittal direction and the meridional direction is small at different angles of view, and the lens assembly 31 has high imaging quality.

Fig. 11 is a diagram showing distortion of light having a wavelength of 546nm after passing through the lens unit 311 of example 1. As can be seen from fig. 11, light having a wavelength of 546nm has less distortion after passing through the lens unit 311 of example 1, and has high imaging quality.

FIG. 12 illustrates a schematic diagram of paraxial chromatic aberration for light passing through lens unit 311 of example 1 at wavelengths 656nm, 587nm, 546nm, 486nm, and 435nm, respectively. Wherein, the curve Q1 represents a vertical axis chromatic aberration curve of a light ray with a wavelength of 656nm passing through the lens unit 311 of embodiment 1, the curve Q2 represents a vertical axis chromatic aberration curve of a light ray with a wavelength of 587nm passing through the lens unit 311 of embodiment 1, the curve Q3 represents a vertical axis chromatic aberration curve of a light ray with a wavelength of 546nm passing through the lens unit 311 of embodiment 1, the curve Q4 represents a vertical axis chromatic aberration curve of a light ray with a wavelength of 486nm passing through the lens unit 311 of embodiment 1, and the curve Q5 represents a vertical axis chromatic aberration curve of a light ray with a wavelength of 435nm passing through the lens unit 311 of embodiment 1.

As can be seen from fig. 12, the absolute values of the distances from the scale of the vertical axis in fig. 12 are smaller for the curves Q1, Q2, Q3, Q4 and Q5 in example 1, which indicates that the light rays of different wavelengths have smaller vertical axis chromatic aberration after passing through the lens unit 311 in example 1, and have high imaging quality.

In the present embodiment, the maximum adjustable range of the field angle FOV of the lens assembly 31 is 95°±11.8°, the full field image height is 15.6mm, and the focal length f is 6.85mm. The lens assembly 31 of the present embodiment meets the design requirements of wide and adjustable field of view, small module size, and clear near-far imaging, and has excellent optical characteristics with on-axis and off-axis chromatic aberration being sufficiently corrected.

Example 2

Fig. 13 is a schematic diagram showing the structure of the lens unit 311 in embodiment 2. Referring to fig. 13, the lens unit 311 includes 8 lenses, and the 8 lenses include a first lens 3111, a second lens 3112, a third lens 3113, a fourth lens 3114, a fifth lens 3115, a sixth lens 3116, a seventh lens 3117, and an eighth lens 3118, which are sequentially disposed from the object side to the image side in the optical axis direction of the lens unit 311. The types, materials and arrangement of the 8 lenses in the optical axis direction of the lens unit 311 in embodiment 2 are the same as those in embodiment 1, and will not be described in detail here. In this embodiment, only the differences from embodiment 1 are listed.

The first lens 3111 has negative optical power, an object-side surface of the first lens 3111 is concave at a paraxial region, and an image-side surface of the first lens 3111 is convex at the paraxial region.

Table 4 shows design parameters of the lens assembly of example 2

Table 5 shows design parameters of the surface type of the lens assembly in example 2

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It should be noted that, the meanings represented by the parameters in table 4 and table 5 can be referred to the related description in embodiment 1, and will not be further described herein. The surface shape of each lens in example 2 may be an aspherical surface, and specifically may be obtained by referring to the aspherical surface calculation formula in example 1.

In this embodiment, the values of the lens unit 311 and the values corresponding to the parameters specified in the conditional expression are shown in table 6.

Table 6 shows the performance parameters of the lens units of example 2

Similarly, to verify the effect of the lens assembly 31, the present embodiment tests some performances of the lens assembly 31, and the test results are shown in fig. 14 to 16.

Fig. 14 shows a schematic diagram of the field curvature of a light ray having a wavelength of 546nm after passing through the lens unit 311 of example 2. As can be seen from fig. 14, the S-curve and the T-curve are both close to the scale of the vertical axis in fig. 14, the field curvature of the lens assembly 31 in the sagittal direction and the meridional direction is small at different angles of view, and the lens assembly 31 has high imaging quality.

Fig. 15 shows a distortion diagram of light having a wavelength of 546nm after passing through the lens unit 311 of example 2. As can be seen from fig. 15, light having a wavelength of 546nm has less distortion after passing through the lens unit 311 of example 2, and has high imaging quality.

FIG. 16 illustrates a schematic diagram of paraxial chromatic aberration for light passing through lens unit 311 of example 2 at wavelengths 656nm, 587nm, 546nm, 486nm and 435nm, respectively. The meanings of the curves Q1, Q2, Q3, Q4 and Q5 are the same as those of the embodiment 1, and will not be further described herein. As can be seen from fig. 16, the absolute values of the distances of the curves Q1, Q1 and Q1 from the scale of the vertical axis in fig. 16 are smaller, which indicates that the light rays of different wavelengths have smaller vertical axis chromatic aberration after passing through the lens unit 311 of embodiment 2, and have high imaging quality.

In the embodiment, the maximum adjustable range of the field angle FOV of the lens assembly 31 is 90 ° ± 18.4 °, the full field image height is 15.6mm, the focal length f is 5.64mm, the lens assembly 31 meets the design requirements of wide and adjustable field range, small module size and clear near-far imaging, and on-axis and off-axis chromatic aberration is sufficiently corrected, and the lens assembly has excellent optical characteristics.

According to the lens assembly 31 provided by the application, an ultra-large image-height optical pick-up lens can be spliced through the plurality of lens units 311, so that the image sensor 37 with high pixels is matched, and the imaging visual field range of the lens is enlarged through the arrangement of the first lens group 311a and the second lens group 311b in the lens units 311 in a relatively tilting manner, so that the capability of the lens for ultra-restoring the details of a shooting object is ensured, the effect of continuously changing the shooting visual field is realized, and the shooting experience of a user is improved.

In describing embodiments of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "coupled" should be construed broadly, and may be, for example, fixedly coupled, indirectly coupled through an intermediary, in communication between two elements, or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

The terms first, second, third, fourth and the like in the description and in the claims and in the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Claims

1. A lens assembly comprising a plurality of lens units, a plurality of said lens units being arranged in a first plane parallel to an image plane of said lens units and configured to be imaged by a same image sensor;

each lens unit comprises a plurality of lenses which are sequentially arranged from an object side to an image side along the optical axis direction of the lens unit, wherein the lenses respectively form a first lens group and a second lens group, and the first lens group is positioned on one side of the second lens group towards the object side and is configured to be capable of tilting relative to the second lens group so as to change the field angle of the lens assembly.

2. The lens assembly of claim 1, wherein a plurality of the lens units have the same structure.

3. The lens assembly of claim 1, wherein a plurality of the lens units are uniformly arranged in the first plane.

4. The lens assembly of claim 1, wherein the optical axis of the first lens group and the optical axis of the second lens group always intersect.

5. The lens assembly of any of claims 1-4, wherein the tiltable angle of the optical axis of the first lens group with respect to the optical axis of the second lens group is greater than or equal to 0 ° and less than or equal to 9.2 °.

6. The lens assembly of claim 5, wherein the field angle of view of the lens assembly is 72 ° or more and 108 ° or less.

7. The lens assembly of claim 5, wherein each of the lenses has optical power.

8. The lens assembly of claim 7, wherein the first lens group comprises at least a first lens, a second lens, a third lens, and a fourth lens disposed in order along the object side to the image side;

9. The lens assembly of claim 8, wherein the lens unit and the first lens satisfy the following conditional expression: 126.80 f is not more than ₁ /f≤17.29；

10. The lens assembly of claim 9, wherein the eighth lens element has a size that satisfies the following condition: d is not less than 1.67 ₈ /CT ₈ Not more than 11.78; wherein D is ₈ CT for the center thickness of the eighth lens on the optical axis of the lens unit ₈ Is the optically effective diameter of the eighth lens.

11. The lens assembly according to claim 9 or 10, wherein the lens unit and the eighth lens satisfy the following conditional expression: BFL/f is more than or equal to 0.24 and less than or equal to 0.29;

wherein BFL is a distance from an image side surface of the eighth lens to an imaging surface of the lens unit along an optical axis of the lens unit.

12. The lens assembly according to claim 11, wherein when the eighth lens is a last lens of the lens units that is sequentially arranged from an object side to an image side in an optical axis direction of the lens units, the lens units and the eighth lens satisfy a conditional expression: the ratio of YI/IH is less than or equal to 0.99;

13. The lens assembly of claim 11, wherein the first lens and the second lens satisfy a conditional condition：MaxY ₁₂ /IH≤0.62；

Wherein MaxY ₁₂ Is the maximum aperture of light passing from the first lens to the second lens.

14. The lens assembly of claim 8, wherein the sixth lens element has a size that satisfies the following condition: -1.46 < R ₁₁ +R ₁₂ )/(R ₁₁ -R ₁₂₎ ≤-1.36；

Wherein R is ₁₁ For the center radius of curvature of the object side surface of the sixth lens, R ₁₂ Is the center radius of curvature of the image side of the sixth lens.

15. The lens assembly of claim 8, wherein the dimensions of a plurality of the lenses satisfy the condition: CT is less than or equal to 1.87 ₂ +CT ₄ +CT ₇ )/(ET ₃ +ET ₅ +ET ₆ )≤2.00；

16. The lens assembly of claim 8, wherein the fifth lens and the sixth lens satisfy the following conditional expression: f is more than or equal to 0.89% ₅ /f ₆ |≤1.33；

17. The lens assembly of claim 8, wherein the first lens has positive or negative optical power, the second lens has negative optical power, the third lens can have positive optical power, the fourth lens has positive optical power, the fifth lens has positive optical power, the sixth lens has negative optical power, the seventh lens has positive optical power, and the eighth lens has negative optical power.

18. A camera module comprising a module body and a lens assembly according to any one of claims 1 to 17, the lens assembly being located within the module body.

19. The camera module of claim 18, wherein the module body includes a plurality of drive devices disposed corresponding to each lens unit in the lens assembly, the lens units being located within the corresponding drive devices, the drive devices being configured to be capable of driving at least one of the first lens group and the second lens group of the lens units to move to tilt the first lens group relative to the second lens group.

20. The camera module of claim 19, wherein the tiltable angle of the first lens group with respect to the second lens group is greater than or equal to 0 ° and less than or equal to 9.2 °.

21. The camera module of claim 18, wherein the module body includes an image sensor, each lens unit in the lens assembly being arranged in a first plane that is parallel to the photosurface and corresponds to a different region of the photosurface of the image sensor.

22. The camera module of claim 21, wherein the image sensor is located on an exit side of the lens assembly.

23. The image capturing module of claim 18, wherein the module body further comprises a diaphragm positioned between the plurality of lenses of the first lens group in a direction of an optical axis of a lens unit in the lens assembly.

24. The image capturing module of claim 18, wherein the module body further comprises a filter positioned on a side of the second lens group toward the image side along an optical axis direction of a lens unit in the lens assembly.

25. An electronic device comprising a housing and a camera module according to any one of claims 18-24, wherein the camera module is located in a receiving space of the housing.