Lens assembly, camera module and electronic equipment

Abstract

The embodiment of the invention provides a lens assembly, a camera module and electronic equipment, the lens assembly comprises two lens units, the first lens unit close to the object side is movably arranged so as to realize switching of the lens assembly between a working state and a non-working state, and when the lens assembly is in the working state, the first lens unit is not in contact with the object side. The lens assembly can realize high-quality imaging with a large aperture and a large target surface, and when the lens assembly is switched to a non-working state, the distance between the two lens units can be compressed to reduce the length and the total optical length of the lens assembly, thereby realizing the thinning of the thickness of the lens assembly and the camera module, and improving the imaging quality. In other words, the lens assembly can ensure high imaging quality in a working state and can also be miniaturized in a non-working state. In addition, the two lens units are arranged at a relatively large interval, so that the thinning of the lens assembly and the camera module in a non-working state is more obvious, the ultrathin camera module is obtained, and the thinning requirement of the electronic equipment is better met.

Description

Technical Field

[0001] The present application relates to the field of camera technology, and in particular to a lens assembly, a camera module and an electronic device. Background Art

[0002] In recent years, with the development of camera technology, camera modules have become an indispensable functional component in electronic products such as mobile phones, tablets, laptops and wearable devices. With the multifunctional development of electronic devices, their shooting effects and requirements are increasingly in line with SLR cameras. The functional effects of camera modules have gradually become one of the important characteristics of electronic devices.

[0003] At present, the camera module usually includes a lens assembly and an image sensor. The lens assembly is usually formed by a plurality of lens lenses arranged in sequence along the optical axis. The light passes through the lens assembly and is then projected to the image sensor to realize the conversion of the optical image to the electrical signal. Therefore, the performance of the lens assembly directly determines the imaging performance of the camera module. With the increasing demand for shooting, in order to increase the amount of light entering the entire imaging system, the imaging lens is gradually developing towards high-quality imaging with a large aperture and a large target surface. However, for optical lenses, increasing the aperture and target surface often leads to an increase in the size of the lens assembly. For example, the increase in the length of the lens assembly itself and the total optical length leads to a larger thickness of the entire camera module, which is not conducive to the miniaturization and ultra-thin development of electronic equipment. The total optical length has become a bottleneck restricting the design of high-quality imaging of large-target-surface and large-aperture lenses. Therefore, there is an urgent need for a lens assembly that can meet the needs of high imaging quality and thinning design. Summary of the invention

[0004] The present application provides a lens assembly, a camera module and an electronic device. When the lens assembly is in a working state, it can achieve a large aperture and a large target surface to achieve high-quality imaging. When the lens assembly is in a non-working state, it has a small total optical length, which can achieve an extremely ultra-thin camera module and meet the thinning design requirements of electronic equipment.

[0005] The first aspect of the present application provides a lens assembly, comprising at least a first lens unit and a second lens unit arranged in sequence from the object side to the image side along the optical axis, wherein the first lens unit and the second lens unit respectively comprise lenses having optical power, and the number of lenses in the first lens unit is multiple. The lens assembly is formed by the above two lens unit structures, and the number of lenses and the structure layout are reasonably allocated, so that the large aperture and large target surface design of the lens assembly can be realized, so that the lens assembly has good optical quality and significantly improves the imaging quality and effect.

[0006] The lens assembly may include a working state and a non-working state. The first lens unit is movably arranged along the optical axis, and all lenses of the first lens unit move toward the second lens unit along the optical axis to switch the lens assembly from the working state to the non-working state.

[0007] When the lens assembly is in working state, the lens assembly satisfies the condition IMH / F#>4.0, wherein IMH is the half-image height of the lens assembly, and F# is the aperture number of the lens assembly, thereby ensuring that the lens assembly has a larger half-image height and a smaller aperture number, and also enables the lens assembly to have both large aperture and large target surface characteristics when in working state, and has high imaging quality, thereby realizing high-quality imaging of the lens assembly with a large target surface and a large aperture.

[0008] When the lens assembly switches from a working state to a non-working state, all the lenses of the first lens unit move toward the second lens, compressing the distance between the first lens unit and the second lens unit, thereby shortening the length and the total optical length of the lens assembly, so that when the lens assembly is in a non-working state, it has a smaller length and total optical length, which is conducive to reducing the thickness of the camera module, thereby meeting the thinning design requirements of electronic equipment.

[0009] In summary, the movement of the first lens unit can realize the switching of the lens assembly between the working state and the non-working state. When the lens assembly is in the working state, the distance between the two lens units can be released, that is, the total optical length of the lens assembly is released, so that the lens assembly has a small aperture number and a large half-image height, and the large aperture and large target surface characteristics of the lens assembly are realized, the imaging quality and effect are improved, and the telephoto function is easy to realize. When the lens assembly is in the non-working state, the distance between the two lens units can be compressed to achieve the compression of the length of the lens assembly and the total optical length, and the thickness of the lens assembly and the camera module is thinned, thereby meeting the thinning design requirements of electronic equipment. That is, the lens assembly can not only ensure miniaturization and thinning in the non-working state, but also take into account the large aperture, large target surface and telephoto functional characteristics in the working state to ensure imaging quality.

[0010] Among them, when the lens assembly is in the working state, the lens assembly also satisfies the conditional formula 0.2 < GD / TTL < 0.5. GD is the distance between the first lens unit and the second lens unit on the optical axis, and TTL is the total optical length of the lens assembly. When the total optical length is fixed, having a relatively large distance GD between the first lens unit and the second lens unit facilitates the realization of the optical path, ensuring that the lens assembly can achieve high-quality imaging with a large aperture and a large target surface design when in the working state. Moreover, when switching the lens assembly to the non-working state by moving the first lens unit, the compressed long distance can make the lens assembly have a smaller length and total optical length in the non-working state, significantly reducing the length dimension of the lens assembly and the camera module in the non-working state, making the thinning of the camera module in the non-working state obvious, so as to obtain an extremely thin camera module in the non-working state, which is more conducive to meeting the thinning requirements of electronic devices.

[0011] In addition, when the lens assembly is in the working state, the focal length of the lens assembly can be adjusted by moving all the lenses in the first lens unit or at least one lens near the image side in the first lens unit along the optical axis, so as to realize functions such as focusing or zooming. Having a relatively large distance GD between the first lens unit and the second lens unit can also expand the movable range of all or part of the lenses near the image side of the first lens unit, improving the operation flexibility of focusing or zooming, and better facilitating the realization of functions such as focusing or zooming, thereby further improving the imaging quality and effect.

[0012] In a possible implementation, when the lens assembly is in the working state, the aperture number of the lens assembly satisfies: 1.1 < F# < 2. The aperture number is small, ensuring that the lens assembly has the characteristics of a large aperture and significantly improving the imaging quality and effect.

[0013] In a possible implementation, when the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: 0.20 < GD / EFL < 0.60, where EFL is the focal length of the lens assembly. The lens assembly has a long focal length and a distance GD, which is conducive to further realizing high-quality imaging under the large target surface design of the lens assembly, and making the distance between the first lens unit and the second lens unit relatively large, which is further conducive to significantly thinning the lens assembly in the non-working state.

[0014] In a possible implementation, when the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: 0.9 < EFL1 / EFL < 1.1, where EFL1 is the focal length of the first lens unit. The optical power of the first lens unit is reasonably distributed, making the first lens unit have a relatively large refractive ability and ensuring the imaging quality and effect of the lens assembly.

[0015] In a possible implementation, when the lens assembly is in the working state, the lens assembly further satisfies the conditional formula: IMH / TTL < 0.7, which makes the semi-image height and the overall optical length of the lens assembly relatively large, further ensuring that the lens assembly has the characteristic of a large target surface, and also facilitating the lens assembly to achieve the telephoto function.

[0016] In a possible implementation, when the lens assembly is in the working state, the lens assembly further satisfies the conditional formula: 0.6 < EFL / TTL < 0.9. When in the working state, the overall optical length of the lens assembly is relatively large, which also makes the focal length and the overall optical length of the lens assembly relatively large, facilitating the lens assembly to achieve the characteristics of a large aperture, a large target surface and a telephoto, and being conducive to further improving the imaging quality and effect.

[0017] In a possible implementation, when the lens assembly is in the working state, the lens assembly further satisfies the conditional formula: EFL * tan(HFOV) ≥ 8.00 mm, where HFOV is the semi-field of view angle of the lens assembly. This ensures that the lens assembly has a relatively large imaging range, and the image formed by the lens assembly has a relatively large image height, further ensuring that the lens assembly can achieve a large target surface design and improving the imaging quality and effect of the lens assembly.

[0018] In a possible implementation, the number of lenses in the first lens unit is greater than or equal to 4. By reasonably distributing the number of lenses in the first lens unit, the refractive power of the first lens unit is ensured, which is conducive to realizing the large aperture and large target surface design of the lens assembly and ensuring the imaging quality and effect.

[0019] In a possible implementation, the number of lenses in the second lens unit is less than or equal to 3. Under the condition of ensuring the imaging quality and effect of the lens assembly, it is conducive to reducing the length and the overall optical length of the lens assembly, further facilitating the thinning of the lens assembly and the camera module, and also being able to reduce the complexity and cost of the architecture design of the lens assembly and is easy to implement.

[0020] In a possible implementation, it further includes an aperture. The aperture is located on the object side of the first lens unit, and the aperture is a variable aperture with a variable diameter, enabling the lens assembly to provide different depth-of-field ranges for different shooting scenes, thereby being able to take into account the shooting requirements of multiple scenes.

[0021] In a possible implementation, the lenses of the first lens unit include a first lens, a second lens, a third lens, a fourth lens and a fifth lens, and the lenses of the second lens unit include a sixth lens and a seventh lens. The first lens, the fifth lens and the sixth lens respectively have positive optical powers, and the second lens, the fourth lens and the seventh lens respectively have negative optical powers. By reasonably distributing the optical powers of the respective lenses, it is conducive to realizing the large aperture and large target surface design of the lens assembly when in the working state.

[0022] In one possible implementation, at least one of the object side surface and the image side surface of the sixth lens is a complex surface, and at least one of the object side surface and the image side surface of the seventh lens is a complex surface, which can adjust the incident angle of light on the image sensor, further facilitate the realization of a large target surface design, and improve the sensitivity of the second lens unit, which is conducive to further improving the imaging quality and effect of the lens assembly.

[0023] The second aspect of the present application provides a camera module, comprising at least an image sensor and any of the above-mentioned lens assemblies, wherein the image sensor is located on the side of the lens assembly facing the image side. By including the lens assembly, the lens assembly can not only ensure miniaturization and thinning in a non-working state, but also take into account the large aperture, large target surface and telephoto functional characteristics in a working state, thereby ensuring the imaging quality, so that the camera module can achieve large aperture, large target surface and telephoto functions under the condition of meeting the requirements of electronic device thinning, and through a camera module, the performance of the main camera module and the telephoto module can be taken into account while maintaining high camera quality, thereby facilitating the optimization of the spatial layout of electronic equipment, reducing the cost of the camera module of the electronic equipment, and improving the performance and experience of the electronic equipment.

[0024] A third aspect of the present application provides an electronic device, comprising at least a housing and the above-mentioned camera module, wherein the camera module is arranged on the housing.

[0025] When the lens assembly is in working state, the first lens unit of the lens assembly is at least partially located outside the shell, so as to release the degree of freedom of the total optical length required by the lens assembly in working state, realize high-quality imaging with large aperture and large target surface, and reduce the total optical length of the lens assembly and the influence of the length on the thickness of the electronic device, which is beneficial to the thinning design of the electronic device while ensuring the high shooting performance of the electronic device.

[0026] When the lens assembly switches from a working state to a non-working state, the first lens unit moves along the optical axis toward the inside of the shell, compressing the distance between the first lens unit and the second lens unit, significantly reducing the length of the camera module in the non-working state. The ultra-thin camera module occupies less space in the electronic device. When the lens assembly is in a non-working state, even if the entire camera module is placed in the electronic device, it will not cause a significant restriction on the thickness design of the electronic device, thereby facilitating the thinning of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the structure of a lens assembly in a camera module provided in an embodiment of the present application when in a working state;

[0029] Figure 3 A schematic structural diagram of a lens assembly in a camera module provided in an embodiment of the present application when the lens assembly is in a non-working state;

[0030] Figure 4 A schematic diagram of a simulation structure of a lens assembly in a camera module provided in Embodiment 1 of the present application when the lens assembly is in a working state;

[0031] Figure 5 A modulation transfer function curve diagram of a camera module provided in Example 1 of the present application;

[0032] Figure 6 A schematic diagram of a simulation structure of a lens assembly in a camera module provided in Embodiment 2 of the present application when the lens assembly is in a working state;

[0033] Figure 7 A modulation transfer function curve diagram of a camera module provided in Embodiment 2 of the present application;

[0034] Figure 8 A schematic diagram of a simulation structure of a lens assembly in a camera module provided in Embodiment 3 of the present application when the lens assembly is in a working state;

[0035] Fig. 9 A modulation transfer function curve diagram of a camera module provided in Embodiment 3 of the present application;

[0036] Fig.10 A schematic diagram of a simulation structure of a lens assembly in a camera module provided in Embodiment 4 of the present application when the lens assembly is in a working state;

[0037] Fig.11 A modulation transfer function curve diagram of a camera module provided in Embodiment 4 of the present application;

[0038] Fig.12 A schematic diagram of a simulation structure of a lens assembly in a camera module provided in Embodiment 5 of the present application when the lens assembly is in a working state;

[0039] Fig.13 A modulation transfer function curve diagram of a camera module provided in Embodiment 5 of the present application;

[0040] Fig.14 A schematic diagram of a simulation structure of a lens assembly in a camera module provided in Embodiment 6 of the present application when the lens assembly is in a working state;

[0041] Fig.15 This is a modulation transfer function curve diagram of a camera module provided in Example 6 of the present application.

[0042] Description of reference numerals:

[0043] 100- electronic equipment;

[0044] 101- Camera module;

[0045] 10- Lens assembly;

[0046] 110-a first lens unit;

[0047] 11-first lens; 12-second lens; 13-third lens; 14-fourth lens; 15-fifth lens;

[0048] 120 - second lens unit;

[0049] 16-sixth lens; 17-seventh lens;

[0050] 130- aperture;

[0051] 20- Image sensor;

[0052] 30-Filter;

[0053] 102-housing;

[0054] 103- bell mouth;

[0055] 104-data interface. DETAILED DESCRIPTION

[0056] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0057] To facilitate understanding, the relevant technical terms involved in the embodiments of the present application are first explained and illustrated.

[0058] The object side, with the lens assembly as the boundary, the side where the photographed object is located is the object side, and the side of the lens or optical element facing the object side is the object side surface.

[0059] The image side, with the lens assembly as the boundary, the side where the image of the object is located is the image side, and the side of the lens or optical element facing the image side is the image side side.

[0060] The optical axis refers to the light that passes through the center of each lens element of the lens assembly (see Figure 2 The imaginary axis L in the figure).

[0061] The imaging plane is located on the image side of all the lenses in the lens assembly and is the plane on which the image is formed after the light passes through each lens in the lens assembly in sequence. In the embodiment of the present application, the imaging plane may refer to the photosensitive surface of the image sensor.

[0062] Half image height (IMH for short in the present embodiment) refers to half of the full image height of the image formed by the lens assembly, which is the maximum radius of the imaging circle.

[0063] The optical focal length is equal to the difference between the convergence of the image-side beam and the convergence of the object-side beam, and represents the ability of the lens to refract incident parallel light beams.

[0064] Positive power means that the lens has a positive focal length and has the effect of converging light.

[0065] Negative optical power means that the lens has a negative focal length and has the effect of diverging light.

[0066] The Abbe number, also known as the dispersion coefficient, refers to the difference ratio of the refractive index of an optical material at different wavelengths, indicating the degree of dispersion of the material.

[0067] Refractive index is the ratio of the speed of light in a vacuum (air) to the speed of light in the lens material. The higher the refractive index of the lens, the stronger its ability to refract incident light. The higher the refractive index, the thinner the lens, that is, with the same thickness at the center of the lens, the same degree and the same material, the edge of the lens with a high refractive index is thinner than that of the lens with a low refractive index.

[0068] The radius of curvature is the reciprocal of the curvature. The curvature of a plane curve is the rotation rate of the tangent direction angle at a point on the curve to the arc length. It is defined by differentiation and indicates the degree to which the curve deviates from a straight line.

[0069] Focal length, also known as focal length, is usually expressed as effective focal length (EFL) to distinguish it from parameters such as front focal length and back focal length. Focal length or effective focal length is a measure of the convergence or divergence of light in an optical system. It refers to the vertical distance from the optical center of a lens or lens group to the focal plane when an infinitely distant scene forms a clear image on the focal plane through a lens or lens group. From a practical point of view, it can be understood as the distance from the center of the lens assembly to the imaging plane.

[0070] The aperture is a device used to control the amount of light that passes through a lens or lens group and enters the photosensitive surface of a camera module. It is usually fixed inside the camera module, and the aperture size can be expressed by the F# value.

[0071] The aperture number F# is a relative value (the inverse of the relative aperture) obtained by the focal length of the lens assembly / the light-passing diameter (entrance pupil diameter) of the lens assembly. The smaller the F# value, the more light enters in the same unit time, the smaller the depth of field, and the background content of the photo will be blurred, producing an effect similar to that of a telephoto lens.

[0072] The amount of light entering refers to how much light passes through the lens or lens group (also known as the lens assembly) and shines on the photosensitive surface.

[0073] The target surface refers to the photosensitive surface of the image sensor. The larger the target surface, the greater the sensitivity of the image sensor and the greater the image height.

[0074] The total track length (TTL), also known as the total height or total length, refers to the total length from the object side of the lens closest to the object side in the lens assembly to the imaging plane on the optical axis, and is the main factor in forming the height of the camera module. Figure 2 As shown, the total optical length TTL may be the length on the optical axis from the object side of the lens (such as the first lens) disposed closest to the object side to the photosensitive surface of the image sensor.

[0075] The length of the lens assembly is the actual length (or mechanical length) of the lens assembly on the optical axis, that is, the length on the optical axis from the object side of the lens closest to the object side to the image side of the lens closest to the image side. Figure 2 The length of the middle lens assembly is the length along the optical axis L from the object side of the first lens to the image side of the seventh lens.

[0076] The field of view (FOV) is the angle formed by the two edges of the lens with the lens as the vertex and the maximum range of the image of the object passing through the lens. The size of the field of view determines the field of view of the lens. The larger the field of view, the larger the field of view. The half field of view (HFOV) refers to half of the field of view.

[0077] Modulation transfer function (MTF) is an evaluation measure of system imaging quality.

[0078] An embodiment of the present application provides an electronic device, which may include but is not limited to a mobile phone, a tablet personal computer, a laptop computer, a camera, an ultra-mobile personal computer (UMPC), a handheld computer, a walkie-talkie, a netbook, a POS machine, a personal digital assistant (PDA), a wearable device, a virtual reality (VR) device (such as VR glasses, VR helmets, etc.), an augmented reality (AR) device (such as AR glasses, AR helmets, etc.), a vehicle-mounted device, a surveillance camera device, and other electronic devices that can realize a shooting function.

[0079] In the embodiment of the present application, the electronic device is taken as a mobile phone as an example. The mobile phone may be a bar phone, or the mobile phone may be a folding phone. Specifically, the following description is made by taking the electronic device as a bar phone as an example.

[0080] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0081] See also Figure 1 As shown, the electronic device 100 may include a shell 102 and a camera module 101, wherein the shell 102 may serve as the main load-bearing structure of the electronic device, and the camera module 101 may be arranged on the shell 102. Exemplarily, the shell 102 may have a receiving cavity, and the camera module 101 may be assembled on the shell 102, and at least part of it may be located in the receiving cavity of the shell 102.

[0082] The camera module 101 is used to realize the function of shooting, for example, it can be used to take pictures and record images, etc. Its shooting scenes can include various complex and diverse shooting application scenes, such as indoor, outdoor, people, environment and other different scenes.

[0083] The electronic device 100 may further include a display screen (not shown in the figure), which may be fixed to one side of the housing 102 , and the plane on the side where the display screen is located may serve as a display surface of the electronic device 100 to display images and the like.

[0084] In the embodiment of the present application, the side where the display surface of the electronic device 100 is located is taken as the front side of the electronic device 100, and the side opposite to the front side is taken as the back side of the electronic device 100. The directions perpendicular to the front side of the electronic device 100 and the back side of the electronic device 100 can be the thickness direction of the electronic device 100, such as Figure 1 The z direction shown in .

[0085] The camera module 101 may be a front camera lens, for example, the camera module may be located on the front side of the electronic device 100 for taking selfies or photographing other objects.

[0086] Alternatively, the camera module 101 may also be a rear camera lens, as shown in FIG. Figure 1 As shown, the camera module 101 can be located on the back of the electronic device 100 and used for photographing other objects, and of course can also be used for taking selfies.

[0087] The number of camera modules 101 included in the electronic device 100 may be one, or the number of camera modules 101 may be multiple, so as to meet different shooting requirements.

[0088] The electronic device 100 may also include other structural components, for example, Figure 1 As shown, the electronic device 100 may further include a bell mouth 103, which may be provided on the housing 102, and may be used to play the audio and the like of the electronic device 100. A sound emitter (not shown in the figure) may also be provided in the accommodating cavity of the housing 102, and the sound emitter may be used to form sound, and the sound emitter may be connected to the bell mouth 103, so that the sound may be transmitted through the bell mouth 103.

[0089] The electronic device 100 may also have a data interface 104, which may be opened on the shell 102. A control circuit board (not shown in the figure) may also be arranged in the accommodating cavity of the shell 102. The control circuit board may be connected to the data interface 104. The data interface 104 may be used to power the electronic device 100, or the data interface 104 may also be used to connect the electronic device 100 with headphones, external multimedia devices, etc. (such as external cameras, external projection devices, etc.).

[0090] It is to be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown in the figure, or combine certain components, or separate certain components, or arrange the components differently. For example, the electronic device 100 may also include devices such as sensors, processors, drive structures, and flashlights.

[0091] The camera module usually includes a lens assembly and an image sensor. Light can enter the camera module through the lens assembly. Specifically, light reflected by the object being photographed can pass through the lens assembly. The lens assembly is used to form an optical image (light signal) of the object being photographed. For example, the lens assembly can adjust and control the light path to form an optical image, and irradiate the optical image to the image sensor. The image sensor can realize the photoelectric conversion function. The image sensor receives the optical image and converts it into an electrical signal for imaging display.

[0092] Therefore, the optical performance of the lens assembly will have a great impact on the imaging quality and effect of the camera module. For example, the aperture number of the lens assembly will affect the night scene shooting, video, background blur and snapshot functions. In other words, the camera module using a large aperture has better imaging quality and imaging effect in night scene shooting, video, background blur and snapshot scenes.

[0093] The target surface size of the lens assembly is also one of the important factors affecting the imaging quality. A lens assembly with a large target surface is beneficial to improving the imaging brightness and resolution of the entire camera module, obtaining better imaging quality. In addition, a lens assembly with a large target surface design is also conducive to the realization of the telephoto function, further enriching the shooting effect and improving the imaging quality.

[0094] Therefore, as the demand for shooting with electronic devices such as mobile phones becomes increasingly higher, in order to further increase the amount of light entering, the imaging system is gradually developing towards a large aperture and a large target surface to achieve high imaging quality and effects.

[0095] However, for optical lenses, increasing the aperture and target surface can increase the amount of light entering the optical imaging system, but it often leads to an increase in the length of the lens assembly itself and the total optical length, making the length of the entire camera module larger, and the camera module occupies a large space in the thickness direction of the electronic device, which is not conducive to the thinning design of the electronic device. Therefore, the length of the lens assembly and the total optical length have become bottlenecks that restrict the high imaging quality of large aperture and large target surface lenses. For example, the main camera module commonly used in electronic devices is difficult to take into account the characteristics of large aperture and large target surface due to the constraints of the thickness and focal length of the device. The imaging quality of the main camera module needs to be further improved, and the main camera module is usually difficult to achieve the telephoto function, that is, it is difficult for a camera module to take into account the characteristics of main camera and telephoto. Therefore, independent main camera modules and telephoto modules are usually set in electronic devices. The telephoto module is used to meet the telephoto shooting requirements, resulting in high cost and large size of the module used for camera in the electronic device, and the light and dark color changes of the screen when switching between the two modules are also obvious, which has a poor experience and affects the performance of the electronic device.

[0096] Based on this, the embodiment of the present application provides a lens assembly, which includes a structure of two lens units, and enables the first lens unit close to the object side to be movable to switch the lens assembly between the working state and the non-working state, so that the lens assembly can have a large aperture and a large target surface design when in the working state to achieve high-quality imaging. The lens assembly has a smaller length and total optical length when in the non-working state, realizing an ultra-thin structure of the lens assembly and the camera module, meeting the thinning requirements of electronic devices.

[0097] The lens assembly provided in the embodiments of the present application and the camera module including the lens assembly are described in detail below in conjunction with the accompanying drawings.

[0098] Figure 2 A schematic structural diagram of a lens assembly in a camera module provided in an embodiment of the present application when in a working state.

[0099] See also Figure 2 As shown, the camera module 101 may include a lens assembly 10 and an image sensor 20, wherein the image sensor 20 may be located on the side of the lens assembly 10 facing the image side, that is, the lens assembly 10 may be located between the object to be photographed and the image sensor 20, and the photosensitive surface (also referred to as the imaging surface) of the image sensor 20 may face the lens assembly 10.

[0100] The light reflected by the object enters the camera module 101, forms an image after passing through the lens assembly 10 and is irradiated onto the photosensitive surface of the image sensor 20. The photosensitive surface of the image sensor 20 receives the optical image and converts it into an image electrical signal output, thereby realizing the functions of the camera module 101 such as taking pictures or videos.

[0101] To ensure the photosensitivity of the image sensor 20, the image sensor 20 can be located in a housing inside the electronic device housing, and the lens assembly 10 can be located on the side of the image sensor 20 facing the display screen, or the lens assembly 10 can also be located on the side of the image sensor 20 facing away from the display screen.

[0102] The image sensor 20 may be a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), or other devices capable of realizing a photoelectric conversion function.

[0103] Continue to see Figure 2 As shown, the camera module 101 may also include a filter 30, which may be located between the lens assembly 10 and the image sensor 20. Figure 2 The dotted line L in the figure is the optical axis. Along the direction of the optical axis L from the object side to the image side, the lens assembly 10, the filter 30 and the image sensor 20 are arranged in sequence. The light entering the camera module 101 passes through the lens assembly 10 and the filter 30 in sequence and then irradiates the photosensitive surface of the image sensor 20. The filter 30 has a filtering effect, which can allow light within a specific wavelength range to pass through, thereby filtering stray light that is not conducive to imaging, which is conducive to improving imaging quality.

[0104] It is understandable that, in order to facilitate receiving light during shooting, the optical axis L of the lens assembly 10 can be parallel to the thickness direction of the electronic device. In the embodiment of the present application, the thickness of the lens assembly 10 or the camera module 101 can refer to the length of the lens assembly 10 or the camera module 101 along the optical axis L, that is, the thickness z direction.

[0105] The camera module 101 may also include an image processor, a memory, etc. (not shown in the figure). The image sensor 20 may transmit the converted electrical signal to the image processor, the memory, etc. for processing and then transmit it to the electronic device, thereby realizing the display of the image of the photographed object through the display screen of the electronic device.

[0106] Of course, in some other examples, the camera module 101 may also include other structural components, such as a detection sensor, a driving structure, and a circuit board.

[0107] Among them, continue to see Figure 2 As shown, the lens assembly 10 may include at least a first lens unit 110 and a second lens unit 120 arranged in sequence from the object side to the image side along the optical axis L, and the first lens unit 110 and the second lens unit 120 are respectively composed of lenses with optical power.

[0108] The lens assembly 10 may further include a lens barrel (not shown in the figure), which may serve as the main bearing structure of the lens assembly 10. The first lens unit 110 and the second lens unit 120 may be disposed in the lens barrel, and the optical axis of the lens assembly 10 may coincide with the central axis of the lens barrel. Light holes may be provided at opposite ends of the lens barrel along the optical axis to allow light to enter the lens barrel and pass through the lens assembly 10, and to allow light passing through the lens assembly 10 to be emitted to illuminate the image sensor 20.

[0109] The lens assembly 10 may further include an aperture 130. The aperture 130 may be located on a side of the first lens unit 110 facing the object side, that is, compared with the first lens unit 110 and the second lens unit 120, the aperture 130 may be arranged closer to the object side. The aperture 130 may be fixed in the lens barrel. For example, the aperture 130 may be fixed on a lens (such as the first lens 11) in the first lens unit 110 that is arranged closest to the object side.

[0110] Of course, in some other examples, the aperture 130 can also be fixed outside the lens barrel. The light can first pass through the aperture 130, and then pass through the first lens unit 110 and the second lens unit 120 in sequence before being emitted. The aperture 130 can limit the light entering the lens assembly 10 to adjust the intensity of the light, and can be used to control the amount of light entering the lens assembly 10.

[0111] Among them, the aperture 130 can be a variable aperture whose aperture size can be adjusted, which improves the controllability and flexibility of the aperture 130 in adjusting the amount of incoming light, so that the lens assembly 10 can provide different depth of field ranges for different shooting scenes, thereby taking into account the shooting needs of multiple scenes.

[0112] Of course, in some other examples, the aperture 130 may also be an aperture with a fixed diameter, which ensures the amount of light entering while simplifying the structural design difficulty of the lens assembly 10.

[0113] The number of lenses in the first lens unit 110 may be multiple, and the multiple lenses may be arranged in sequence from the object side to the image side along the optical axis, and the centers of the multiple lenses may overlap and be located on the optical axis. Figure 2As shown, the first lens unit 110 may include five lenses with optical power, such as a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15, which are arranged in sequence from the object side to the image side along the optical axis L. That is, the first lens 11 is a lens with optical power disposed closest to the object side in the first lens unit 110, and the fifth lens 15 is a lens with optical power disposed closest to the image side (the second lens unit 120) in the first lens unit 110.

[0114] The number of lenses in the second lens unit 120 may also be multiple, and the multiple lenses may be arranged in sequence from the object side to the image side along the optical axis, and the centers of the multiple lenses may overlap and be located on the optical axis. Figure 2 As shown, the second lens unit 120 may include two lenses with optical power, such as a sixth lens 16 and a seventh lens 17, which are arranged in sequence from the object side to the image side along the optical axis L. That is, the sixth lens 16 is a lens with optical power disposed closest to the object side (the first lens unit 110) in the second lens unit 120, and the seventh lens 17 is a lens with optical power disposed closest to the image side in the second lens unit 120.

[0115] Of course, in some other examples, the number of lenses in the second lens unit 120 may also be one. For example, the second lens unit 120 may only include the sixth lens 16 .

[0116] The above two lens unit structures form a lens assembly 10. By reasonably allocating the number of lenses, the optical parameters of each lens and the structural layout, etc., a large aperture and a large target surface design of the lens assembly 10 can be achieved, so that the lens assembly 10 has excellent optical quality and significantly improves the imaging quality and effect.

[0117] For example, in the embodiment of the present application, an example is given in which the first lens unit 110 includes five lenses with optical power, and the second lens unit 120 includes two lenses with optical power.

[0118] The lens assembly 10 may include a working state and a non-working state. For example, when the camera module 101 is used to shoot and the lens assembly 10 is required to achieve imaging, the lens assembly 10 is in a working state. When the camera module 101 is not used to shoot and the lens assembly 10 is not required to achieve imaging, the lens assembly 10 is in a non-working state.

[0119] For example, in a possible example, taking a mobile phone as an example, the mobile phone may include the camera module 101, and the mobile phone can realize the shooting function of large aperture and large target surface through the camera module 101. When the user turns on the shooting function of the mobile phone (such as by clicking to open the camera application on the page displayed on the mobile phone display), the lens assembly 10 switches to the working state. When the lens assembly 10 is in the working state, the lens assembly 10 can be used for imaging, so that the camera module 101 can realize the shooting function. When the user turns off or exits the shooting function of the mobile phone (such as when turning off or exiting the camera), the lens assembly 10 switches to the non-working state. When the lens assembly 10 is in the non-working state, the lens assembly 10 is not used for imaging, and the camera module 101 does not realize the shooting function.

[0120] Alternatively, in another possible example, the mobile phone may include the camera module 101, and the mobile phone may also include other camera modules to realize other camera functions (such as telephoto function, etc.), thereby enriching the camera function of the mobile phone. When the user turns on the shooting function of the mobile phone (such as when the camera is turned on by clicking), and switches to the large aperture, large target surface shooting mode, the lens assembly 10 switches to the working state. When the lens assembly 10 is in the working state, the lens assembly 10 can be used for imaging, so that the camera module 101 realizes the shooting function. When the user turns off or exits the large aperture, large target surface mode, and switches to other camera modules to realize other camera functions, or turns off or exits the shooting function (such as when the camera is turned off or exited), the lens assembly 10 switches to the non-working state, the lens assembly 10 is not used for imaging, and the camera module 101 does not realize the shooting function.

[0121] Among them, all the lenses of the first lens unit 110 can be fixed on the lens barrel in a movable manner, the second lens unit 120 can be fixedly assembled on the lens barrel, and all the lenses of the first lens unit 110 can move relative to the lens barrel (the housing of the electronic device), the second lens unit 120 and the image sensor 20. The movement of all the lenses in the first lens unit 110 can realize the switching of the lens assembly 10 between the working state and the non-working state.

[0122] For details, see Figure 2 As shown, when the lens assembly 10 is in working state, a certain distance is maintained between the first lens unit 110 and the second lens unit 120 on the optical axis, and the distance is the air gap between the first lens unit 110 and the second lens unit 120 on the optical axis. Exemplarily, when the second lens unit 120 has a plurality of lenses, the distance is the distance on the optical axis between the image side of the lens closest to the image side in the first lens unit 110 and the object side of the lens closest to the object side in the second lens unit 120, as shown in FIG. Figure 2The distance GD between the fifth lens 15 of the first lens unit 110 and the sixth lens 16 of the second lens unit 120 on the optical axis, the length of the lens assembly 10 and the total optical length are relatively long, so that the lens assembly 10 can easily achieve the characteristics of a large aperture and a large target surface when in a working state, and is conducive to realizing the telephoto function of the lens assembly 10. At this time, the length of the entire camera module 101 along the optical axis is longer, and the thickness of the camera module 101 is thicker.

[0123] It can be understood that when the number of lenses in the second lens unit 120 is one, such as only including the sixth lens, the spacing is the distance on the optical axis between the image side of the lens closest to the image side (such as the fifth lens 15) in the first lens unit 110 and the object side of the sixth lens in the second lens unit 120.

[0124] Specifically, when the lens assembly 10 is in a working state, with the half image height of the lens assembly 10 as IMH and the aperture number of the lens assembly 10 as F#, the ratio of the half image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 can satisfy IMH / F#>4.0, so that the lens assembly 10 has a larger half image height and a smaller aperture number, which means that the lens assembly 10 can have both large aperture and large target surface characteristics when in a working state, and has high imaging quality, thereby achieving high-quality imaging of the lens assembly 10 with a large target surface and a large aperture.

[0125] When the lens assembly 10 switches from a working state to a non-working state, all the lenses of the first lens unit 110 can move along the optical axis toward the second lens unit 120, that is, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14 and the fifth lens 15 in the first lens unit 110 move along the optical axis L toward the second lens unit 120, compressing the distance GD between the first lens unit 110 and the second lens unit 120, thereby reducing the distance between the first lens unit 110 and the second lens unit 120, shortening the length of the lens assembly 10 and the total optical length, and thus reducing the overall length of the camera module 101 on the optical axis (that is, the thickness of the camera module 101).

[0126] Figure 3 A structural schematic diagram of a lens assembly in a camera module provided in an embodiment of the present application when the lens assembly is in a non-working state.

[0127] When the lens assembly 10 is in a non-operating state, see Figure 3 As shown, the first lens unit 110 is disposed adjacent to the second lens unit 120 , and the distance between the two can be very small. The lens assembly 10 has a smaller length dimension and total optical length, which significantly reduces the thickness of the camera module 101 .

[0128] That is to say, in the embodiment of the present application, when the lens assembly 10 is in the working state, the distance between the first lens unit 110 and the second lens unit 120 can be released, that is, the overall optical length of the lens assembly 10 in the working state is released, so that the lens assembly 10 can have a large semi-image height and a small aperture number, realizing the characteristics of a large aperture and a large target surface of the lens assembly 10, improving the imaging quality and effect, and also facilitating the realization of the telephoto function. When the lens assembly 10 is in the non-working state, the distance between the first lens unit 110 and the second lens unit 120 is compressed, that is, the length and the overall optical length of the lens assembly 10 are compressed, reducing the thickness dimension of the lens assembly 10 and the camera module 101, so as to meet the thinning design requirements of the electronic device. That is, the lens assembly 10 can not only ensure miniaturization and thinning in the non-working state, but also take into account the characteristics of a large aperture, a large target surface and a telephoto function in the working state, ensuring the imaging quality, so that the camera module 101 can realize a large aperture, a large target surface and a telephoto function under the condition of meeting the thinning requirements of the electronic device, and through a camera module 101, the performance of the main camera module and the telephoto module can be taken into account on the premise of maintaining high shooting quality, facilitating the optimization of the space layout of the electronic device, reducing the cost of the camera module of the electronic device, and improving the performance and experience of the electronic device.

[0129] Among them, when the lens assembly 10 is in the working state, taking the overall optical length of the lens assembly 10 as TTL, the ratio range of the distance GD on the optical axis between the first lens unit 110 and the second lens unit 120 to the overall optical length TTL of the lens assembly 10 can be 0.2 < GD / TTL < 0.5. When the overall optical length is fixed, making the distance GD between the first lens unit 110 and the second lens unit 120 larger is convenient for the implementation of the optical path, so as to ensure that the lens assembly 10 can achieve high-quality imaging with a large aperture and a large target surface design in the working state.

[0130] Moreover, making the distance GD between the first lens unit 110 and the second lens unit 120 larger, when the lens assembly 10 switches to the non-working state by moving the first lens unit 110, compressing the long distance can make the lens assembly 10 have a smaller length and overall optical length in the non-working state, significantly compressing the length dimension of the lens assembly 10 and the camera module 101 in the non-working state, making the thinning of the camera module 101 in the non-working state obvious, so as to obtain an extremely thin camera module 101 in the non-working state, which is more conducive to meeting the thinning requirements of the electronic device.

[0131] In addition, in order to meet the focus and other requirements of the camera module 101 during the shooting process, for example, autofocus (AF for short), zoom, etc., when the lens assembly 10 is in a working state, all the lenses in the first lens unit 110 or at least one lens in the first lens unit 110 close to the image side (the second lens unit 120) can be moved along the optical axis, such as all or part of the above-mentioned lenses can be moved along the optical axis toward or away from the image sensor 20, thereby changing the distance between all or part of the moving lenses and the image sensor 20, and realizing the adjustment of the focal length of the lens assembly 10, such as realizing the autofocus or zoom functions of the lens assembly 10, so as to achieve a better shooting effect.

[0132] For example, see Figure 2 As shown, taking the movable arrangement of all lenses of the first lens unit 110 as an example, that is, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14 and the fifth lens 15 can be moved along the optical axis toward or away from the image sensor 20 to change the focal length of the lens assembly 10 to achieve functions such as focusing or zooming.

[0133] Of course, in some other examples, at least one lens in the first lens unit 110 close to the second lens unit 120 can be movably arranged. For example, three lenses in the first lens unit 110 close to the second lens unit 120, such as the third lens 13, the fourth lens 14 and the fifth lens 15, can be moved along the optical axis toward or away from the image sensor 20, and operations such as focusing or zooming can also be achieved.

[0134] Therefore, a larger distance GD is provided between the first lens unit 110 and the second lens unit 120, and the movable range of the entire lens or a portion of the lens close to the image side of the first lens unit 110 can be expanded, thereby improving the operational flexibility of focusing or zooming, and better facilitating the realization of focusing or zooming functions, thereby further improving the imaging quality and effect.

[0135] It should be noted that, when the lens assembly 10 is in working state, there is a large distance between the first lens unit 110 and the second lens unit 120, and the length and the total optical length of the lens assembly 10 are relatively long. Therefore, in the electronic device, when the lens assembly 10 is in working state, at least a part of the first lens unit 110 can be located outside the housing of the electronic device, so as to release the degree of freedom of the total optical length required by the lens assembly 10 when it is in working state, realize high-quality imaging with a large aperture and a large target surface, and can reduce the total optical length of the lens assembly 10 and the influence of the length on the thickness of the electronic device, which is conducive to the thinning design of the electronic device while ensuring the optical performance.

[0136] It should be noted that when the lens assembly 10 is in operation, all lenses of the first lens unit 110 may be located outside the housing, or part of the lenses of the first lens unit 110 adjacent to the object side may be located outside the housing.

[0137] When the lens assembly 10 switches from a working state to a non-working state, such as turning off or exiting the shooting function or switching to other camera modules to achieve shooting, the first lens unit 110 can move along the optical axis toward the second lens unit 120, that is, move toward the inside of the housing, compressing the distance between the first lens unit 110 and the second lens unit 120, and significantly reducing the thickness of the camera module 101 in the non-working state. The ultra-thin camera module 101 occupies less space in the electronic device. When the lens assembly 10 is in a non-working state, even if the entire camera module 101 is placed in the electronic device, it will not cause a great restriction on the thickness design of the electronic device, which is convenient for realizing the thinning of the electronic device.

[0138] It should be noted that when the lens assembly 10 is in a non-working state, the first lens unit 110 can be moved into the accommodating cavity in the housing so that the first lens unit 110 is entirely located in the accommodating cavity, that is, the entire camera module 101 can be located inside the housing of the electronic device. Alternatively, the first lens unit 110 can also be partially located inside the housing and partially protrude outside the housing, such as a portion of the lens of the first lens unit 110 adjacent to the object side can be located outside the housing, which is convenient for further reducing the thickness of the electronic device while ensuring good aesthetics.

[0139] On the contrary, when the lens assembly 10 is switched from a non-working state to a working state, such as turning on the shooting function or turning on the shooting function and switching to a large aperture, large target surface shooting mode, the first lens unit 110 can move along the optical axis in a direction away from the second lens unit 120, that is, the first lens unit 110 moves toward the outside of the shell to restore the spacing between the first lens unit 110 and the second lens unit 120, restore the total optical length of the lens assembly 10, and when the lens assembly 10 is in a working state, at least a portion of the first lens unit 110 is popped out of the shell.

[0140] In order to realize the movement of the first lens unit 110 along the optical axis, a light inlet hole can be opened on the shell (or display screen) of the electronic device, and the light inlet hole can be connected to the accommodating cavity in the shell. The first lens unit 110 can move toward the outside or inside of the shell through the light inlet hole.

[0141] In some examples, to ensure the sealing of the internal accommodating cavity of the electronic device, a cover plate may be provided on the light inlet, and to meet the movement requirements of the first lens unit 110, the cover plate may also be movably provided. For example, the cover plate may also be movable along the optical axis.

[0142] When the lens module 10 switches from the non - working state to the working state, the cover plate can first move outward along the optical axis direction towards the outside of the housing, so as to pop out to the outside of the housing to form an avoidance space. The first lens unit 110 can move within this avoidance space, such as moving towards the outside of the housing, so that at least part of the first lens unit 110 also pops out to the outside of the housing, restoring the length and the total optical length of the lens module 10, and ensuring high - quality imaging with a large aperture and a large target surface of the lens module 10.

[0143] On the contrary, when the lens module 10 switches from the working state to the non - working state, the first lens unit 110 can contract along the optical axis towards the inside of the housing, compressing the distance between it and the second lens unit 120. The cover plate can also contract and move along the optical axis towards the inside of the housing, so that the cover plate is hermetically covered on the light - entrance hole.

[0144] The camera module 101 may further include a lens driving structure. For example, the lens driving structure may be a driving chip, a driving motor, etc. The lens driving structure can be connected to the first lens unit 110, and the lens of the first lens unit 110 can be driven to move along the optical axis through the lens driving structure, so as to realize the switching of the lens module 10 between the working state and the non - working state, as well as operations such as zooming and focusing of the camera module 101.

[0145] It should be noted that in the embodiments of the present application, the specific moving manner of all the lenses in the first lens unit 110 is not limited. For example, all the lenses of the first lens unit 110 can be regarded as a whole, and the lens driving structure can drive the first lens unit 110 as a whole to move along the optical axis.

[0146] Or, the number of the lens driving structures can be multiple. The multiple lens driving structures can respectively cooperate with some of the lenses in the first lens unit 110, and the multiple lens driving structures can respectively drive the corresponding lenses to move along the optical axis, so that all the lenses of the first lens unit 110 move along the optical axis.

[0147] The following further details the optical performance of the lens module 10 when the lens module 10 is in the working state.

[0148] When the lens module 10 is in the working state, the aperture number F# of the lens module 10 can satisfy 1.1 < F# < 2. The aperture number is small, ensuring that the lens module 10 has the characteristic of a large aperture, and significantly improving the imaging quality and effect.

[0149] When the lens assembly 10 is in the working state, with the focal length of the lens assembly 10 being EFL, the ratio of the distance GD on the optical axis between the first lens unit 110 and the second lens unit 120 to the focal length EFL of the lens assembly 10 can satisfy 0.20 < GD / EFL < 0.60. The lens assembly 10 has a relatively long focal length and distance GD, which is conducive to further achieving high-quality imaging under the large target surface design of the lens assembly 10, and enables a relatively large distance between the first lens unit 110 and the second lens unit 120, further facilitating the significant thinning of the lens assembly 10 in the non-working state.

[0150] When the lens assembly 10 is in the working state, the ratio of the focal length EFL of the lens assembly 10 to the overall optical length TTL of the lens assembly 10 can satisfy 0.6 < EFL / TTL < 0.9. When in the working state, the overall optical length of the lens assembly 10 is relatively large, which means that both the focal length and the overall optical length of the lens assembly 10 are relatively large, facilitating the lens assembly 10 to achieve large aperture, large target surface and long focal length characteristics, and being conducive to further improving the imaging quality and effect.

[0151] When the lens assembly 10 is in the working state, with the focal length of the first lens unit 110 being EFL1, the ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 can satisfy 0.9 < EFL1 / EFL < 1.1. This reasonably distributes the optical power of the first lens unit 110, enabling the first lens unit 110 to have a relatively large refractive power and ensuring the imaging quality and effect of the lens assembly 10.

[0152] When the lens assembly 10 is in the working state, the ratio of the semi-image height IMH of the lens assembly 10 to the overall optical length TTL of the lens assembly 10 can satisfy IMH / TTL < 0.7. This makes the semi-image height and the overall optical length of the lens assembly 10 relatively large, further ensuring that the lens assembly 10 has the characteristic of a large target surface, and also facilitating the lens assembly 10 to achieve the long focal length function.

[0153] Taking the half field of view angle of the lens assembly 10 as HFOV, the focal length EFL of the lens assembly 10 and the half field of view angle of the lens assembly 10 can satisfy EFL * tan(HFOV) ≥ 8.00 mm, ensuring that the lens assembly 10 has a relatively large imaging range, enabling the lens assembly 10 to have a larger image height during imaging, and further ensuring that the lens assembly 10 can achieve a large target surface design and improving the imaging quality and effect of the lens assembly 10.

[0154] It should be noted that when the lens assembly 10 is in a working state, all or part of the lenses of the first lens unit 110 close to the image side can be moved to achieve focusing or zooming of the lens assembly 10. When moving to achieve focusing or zooming operations, when all or part of the lenses of the first lens unit 110 are moved to any position, the imaging-related optical parameters such as the total optical length TTL of the lens assembly 10, the focal length EFL of the lens assembly 10, the half image height IMH of the lens assembly 10, the aperture number of the lens assembly 10 and the half field of view angle of the lens assembly 10 can satisfy the aforementioned conditional expressions and ranges.

[0155] In the embodiment of the present application, the first lens unit 110 and the second lens unit 120 are both composed of lenses with optical focal length, wherein the number of lenses in the first lens unit 110 can be greater than or equal to 4. The number of lenses in the first lens unit 110 is reasonably allocated to ensure the light refraction ability of the first lens unit 110, which is conducive to realizing the large aperture and large target surface design of the lens assembly 10, thereby ensuring the imaging quality and effect.

[0156] The number of lenses in the second lens unit 120 can be less than or equal to 3, which is beneficial to reducing the length and total optical length of the lens assembly 10 while ensuring the imaging quality and effect of the lens assembly 10, and further helps to achieve the thinning of the lens assembly 10 and the camera module 101, and can also reduce the complexity and cost of the structural design of the lens assembly 10, making it easier to implement.

[0157] For example, in one example, see Figure 2 and Figure 3 As shown, the first lens unit 110 may include five lenses with optical power, such as the first lens 11, the second lens 12, the third lens 13, the fourth lens 14 and the fifth lens 15. The second lens unit 120 may include two lenses with optical power, such as the sixth lens 16 and the seventh lens 17. Thus, the lens assembly 10 is a seven-piece structure, including seven lenses with optical power, and the structure is relatively simple. Under the condition of ensuring that the lens assembly 10 can achieve high-quality imaging with a large aperture and a large target surface design, it is conducive to reducing the volume size and cost.

[0158] Of course, in some other examples, the number of lenses in the first lens unit 110 and the second lens unit 120 may also be other values, so that the lens assembly 10 may also include other lens arrangement combinations, and is not limited to the above-mentioned embodiments, and is only described with reference to the above-mentioned embodiments.

[0159] In the embodiment of the present application, there is no restriction on the focal length of each lens having focal length in the lens assembly 10, and the focal length can be selected and set according to actual camera requirements.

[0160] Exemplarily, in the above-mentioned seven-piece lens assembly 10, the first lens 11 can have positive optical power, the second lens 12 can have negative optical power, the fourth lens 14 can have negative optical power, the fifth lens 15 can have positive optical power, the sixth lens 16 can have positive optical power, and the seventh lens 17 can have negative optical power. The optical power of each lens is reasonably distributed, which is conducive to realizing a large aperture and a large target surface design of the lens assembly 10 when it is in a working state.

[0161] The shapes of the multiple lenses in the lens assembly 10 can be consistent, or the shapes of the multiple lenses can be different. The specific lens shape can be selected and set according to design requirements. For example, the shape of the lens can be circular, elliptical, or other regular or irregular shapes.

[0162] Exemplarily, in the lens assembly 10, the lens closest to the image side is the seventh lens 17, followed by the sixth lens 16, and the light is emitted after passing through the sixth lens 16 and the seventh lens 17 and irradiated to the image sensor 20. At least one of the object side and the image side of the sixth lens 16 can be a complex surface, and at least one of the object side and the image side of the seventh lens 17 can be a complex surface. A complex surface means that the surface has at least two different curvature radius values ​​on two mutually perpendicular cross-sectional circles, for example, see Figure 3 As shown, the image side surface of the sixth lens 16 is an M-shaped curved surface. The incident angle of light on the image sensor 20 can be adjusted, which is further conducive to realizing a large target surface design, and improves the sensitivity of the second lens unit 120, which is conducive to further improving the imaging quality and effect of the lens assembly 10.

[0163] Each lens in the first lens unit 110 and the second lens unit 120 can be an aspherical lens. For example, each lens can be an aspherical lens. The aspherical lens can reduce or eliminate the spherical aberration and distortion aberration introduced by the spherical lens, which can further help to achieve the large aperture performance of the lens assembly 10, and also help to reduce the total optical length of the lens assembly 10.

[0164] The architecture and performance of the lens assembly 10 and the camera module 101 provided in the present application are described below in conjunction with specific embodiments.

[0165] Embodiment 1

[0166] Figure 4 A schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 1 of the present application when it is in a working state.

[0167] In this embodiment, see Figure 4As shown, the lens assembly 10 includes 7 lenses with optical power, wherein the first lens unit 110 includes 5 lenses with optical power, such as the first lens 11, the second lens 12, the third lens 13, the fourth lens 14 and the fifth lens 15. The second lens unit 120 includes 2 lenses with optical power, such as the sixth lens 16 and the seventh lens 17. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16 and the seventh lens 17 are arranged in sequence.

[0168] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, the aperture 130, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the seventh lens 17, the filter 30 and the image sensor 20 are arranged in sequence. The light entering the camera module 101 passes through the lens assembly 10 and the filter 30 in the above order and irradiates the image sensor 20, and finally forms an image on the photosensitive surface of the image sensor 20.

[0169] The first lens 11 may have positive optical power, at least a portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the first lens 11 corresponding to the optical axis may be a concave surface.

[0170] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0171] The third lens 13 may have negative optical power, and at least a portion of the object side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0172] The fourth lens 14 may have negative optical power, and at least a portion of the object side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0173] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0174] The sixth lens 16 may have positive power, the object side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a convex surface, and the image side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the sixth lens 16 is a complex surface.

[0175] The seventh lens 17 may have negative power, the object side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a convex surface, and the image side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the seventh lens 17 is a complex surface.

[0176] When the lens assembly 10 is in working state, see Figure 4 As shown, a large distance is maintained between the object side of the fifth lens 15 in the first lens unit 110 and the image side of the sixth lens 16 in the second lens unit 120 on the optical axis, and the lens assembly 10 can achieve high-quality imaging with a large aperture and a large target surface. When the lens assembly 10 switches from a working state to a non-working state, all the lenses of the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between the two, and reducing the length of the lens assembly 10 and the camera module 101.

[0177] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in working state.

[0178] The half-image height IMH of the lens assembly 10 is 8.2 mm, the aperture number F# of the lens assembly 10 is 1.277, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=6.421 mm.

[0179] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 2.88 mm, the total optical length TTL of the lens assembly 10 is 12.88 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.224.

[0180] The focal length EFL of the lens assembly 10 is 10.0 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.288.

[0181] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=0.996.

[0182] The ratio of the half image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.637.

[0183] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.78.

[0184] The half field of view HFOV of the lens assembly 10 is 40°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.391 mm.

[0185] Table 1.1 shows the optical parameters of each lens in a camera module provided in Example 1 of the present application.

[0186]

[0187] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0188] S1 and S2 are respectively the object side and image side of the first lens 11, S3 and S4 are respectively the object side and image side of the second lens 12, S5 and S6 are respectively the object side and image side of the third lens 13, S7 and S8 are respectively the object side and image side of the fourth lens 14, S9 and S10 are respectively the object side and image side of the fifth lens 15, S11 and S12 are respectively the object side and image side of the sixth lens 16, S13 and S14 are respectively the object side and image side of the seventh lens 17, and S15 and S16 are respectively the object side and image side of the filter 30.

[0189] The thickness is the spacing between adjacent surfaces, which is the distance between a mirror surface and the next adjacent mirror surface on the optical axis in the direction from the object side to the image side. For example, the thickness corresponding to the row where the aperture is located is the distance from the aperture 130 to the object side surface of the first lens 11 on the optical axis, the thickness corresponding to the row where the object side surface S1 of the first lens 11 is the distance between the object side surface and the image side surface of the first lens 11 on the optical axis, that is, the thickness of the first lens 11 on the optical axis, the thickness corresponding to the row where the image side surface S2 of the first lens 11 is the distance from the image side surface of the first lens 11 to the object side surface of the second lens 12 on the optical axis, and so on.

[0190] Table 1.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 1 of the present application.

[0191]

[0192] As can be seen from Table 1.2, each lens in the lens assembly 10 is an aspherical lens, and the lens assembly 10 includes 14 aspherical surfaces. The aspherical surface type z of each lens in the lens assembly 10 can be calculated by the following aspherical surface formula:

[0193]

[0194] Wherein, z is the aspheric surface vector height, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0195] The optical parameters of the camera module 101 composed of the above-mentioned lenses can be seen in the following Table 1.3.

[0196] Table 1.3 shows the optical parameters of a camera module provided in Example 1 of the present application.

[0197]

[0198]

[0199] As can be seen from Table 1.3, the lens assembly 10 provided in the first embodiment of the present application can achieve the characteristics of large aperture and large target surface in the working state, which is beneficial to improving the imaging quality and effect of the camera module 101. Moreover, when the lens assembly 10 switches to the non-working state, the compressed spacing is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 in the non-working state.

[0200] Figure 5 This is a modulation transfer function curve diagram of a camera module provided in Example 1 of the present application.

[0201] in, Figure 5 The horizontal axis represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridian field of view. The F1:Diff.Limit line in the figure is the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. Figure 5 It can be seen that the camera module provided in Example 1 of the present application can achieve high-quality imaging.

[0202] Embodiment 2

[0203] Figure 6 A schematic diagram of the simulation structure of a lens assembly in a camera module provided in Embodiment 2 of the present application when in a working state.

[0204] In this embodiment, see Figure 6As shown, the lens assembly 10 includes 7 lenses with optical power, wherein the first lens unit 110 includes 5 lenses with optical power, such as the first lens 11, the second lens 12, the third lens 13, the fourth lens 14 and the fifth lens 15. The second lens unit 120 includes 2 lenses with optical power, such as the sixth lens 16 and the seventh lens 17. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16 and the seventh lens 17 are arranged in sequence.

[0205] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, an aperture (not shown in the figure), a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a seventh lens 17, a filter 30 and an image sensor 20 are sequentially arranged. The light entering the camera module 101 passes through the lens assembly 10, the filter 30 in the above order and irradiates the image sensor 20, and finally forms an image on the photosensitive surface of the image sensor 20.

[0206] The first lens 11 may have positive power, at least a portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the first lens 11 corresponding to the optical axis may be a convex surface.

[0207] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0208] The third lens 13 may have positive optical power, and at least a portion of the object side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0209] The fourth lens 14 may have negative optical power, and at least a portion of the object side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0210] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0211] The sixth lens 16 may have positive power, the object side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a convex surface, and the image side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the sixth lens 16 is a complex surface.

[0212] The seventh lens 17 may have negative power, the object side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a convex surface, and the image side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the seventh lens 17 is a complex surface.

[0213] When the lens assembly 10 is in working state, see Figure 6 As shown, a large distance is maintained between the object side of the fifth lens 15 in the first lens unit 110 and the image side of the sixth lens 16 in the second lens unit 120 on the optical axis, and the lens assembly 10 can achieve high-quality imaging with a large aperture and a large target surface. When the lens assembly 10 switches from a working state to a non-working state, all the lenses of the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between the two, and reducing the length of the lens assembly 10 and the camera module 101.

[0214] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in working state.

[0215] The half-image height IMH of the lens assembly 10 is 8.43 mm, the aperture number F# of the lens assembly 10 is 1.359, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=6.203 mm.

[0216] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 3.35 mm, the total optical length TTL of the lens assembly 10 is 13.35 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.251.

[0217] The focal length EFL of the lens assembly 10 is 9.93 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.337.

[0218] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=0.947.

[0219] The ratio of the half image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.631.

[0220] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.744.

[0221] The half field of view HFOV of the lens assembly 10 is 40°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.332 mm.

[0222] Table 2.1 shows the optical parameters of each lens in a camera module provided in Example 2 of the present application.

[0223]

[0224] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0225] For specific illustrations of S1-S16, thickness, etc., please refer to the first embodiment, and will not be repeated in this embodiment.

[0226] Table 2.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 2 of the present application.

[0227]

[0228]

[0229] As can be seen from Table 2.2, each lens in the lens assembly 10 is an aspherical lens, and the lens assembly 10 includes 14 aspherical surfaces. The aspherical surface type z of each lens in the lens assembly 10 can be calculated by the following aspherical surface formula:

[0230]

[0231] Wherein, z is the aspheric surface vector height, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0232] The optical parameters of the camera module 101 composed of the above-mentioned lenses can be seen in the following Table 2.3.

[0233] Table 2.3 shows the optical parameters of a camera module provided in Example 2 of the present application.

[0234]

[0235] As can be seen from Table 2.3, the lens assembly 10 provided in the second embodiment of the present application can achieve the characteristics of large aperture and large target surface in the working state, which is beneficial to improving the imaging quality and effect of the camera module 101. Moreover, when the lens assembly 10 switches to the non-working state, the compressed spacing is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 in the non-working state.

[0236] Figure 7 This is a modulation transfer function curve diagram of a camera module provided in Example 2 of the present application.

[0237] in, Figure 7 The horizontal axis represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridian field of view. The F1:Diff.Limit line in the figure is the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. Figure 7 It can be seen that the camera module provided in Example 2 of the present application can achieve high-quality imaging.

[0238] Embodiment 3

[0239] Figure 8 A schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 3 of the present application when it is in a working state.

[0240] In this embodiment, see Figure 8 As shown, the lens assembly 10 includes 7 lenses with optical power, wherein the first lens unit 110 includes 5 lenses with optical power, such as the first lens 11, the second lens 12, the third lens 13, the fourth lens 14 and the fifth lens 15. The second lens unit 120 includes 2 lenses with optical power, such as the sixth lens 16 and the seventh lens 17. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16 and the seventh lens 17 are arranged in sequence.

[0241] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, an aperture (not shown in the figure), a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a seventh lens 17, a filter 30 and an image sensor 20 are sequentially arranged. The light entering the camera module 101 passes through the lens assembly 10, the filter 30 in the above order and irradiates the image sensor 20, and finally forms an image on the photosensitive surface of the image sensor 20.

[0242] The first lens 11 may have positive focal power, at least a portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the first lens 11 corresponding to the optical axis may be a convex surface.

[0243] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0244] The third lens 13 may have positive optical power, and at least a portion of the object side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0245] The fourth lens 14 may have negative optical power, and at least a portion of the object side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface.

[0246] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0247] The sixth lens 16 may have positive power, the object side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a convex surface, and the image side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the sixth lens 16 is a complex surface.

[0248] The seventh lens 17 may have negative power, the object side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a convex surface, and the image side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the seventh lens 17 is a complex surface.

[0249] When the lens assembly 10 is in working state, see Figure 8 As shown, a large distance is maintained between the object side of the fifth lens 15 in the first lens unit 110 and the image side of the sixth lens 16 in the second lens unit 120 on the optical axis, and the lens assembly 10 can achieve high-quality imaging with a large aperture and a large target surface. When the lens assembly 10 switches from a working state to a non-working state, all the lenses of the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between the two, and reducing the length of the lens assembly 10 and the camera module 101.

[0250] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in working state.

[0251] The half-image height IMH of the lens assembly 10 is 8.42 mm, the aperture number F# of the lens assembly 10 is 1.51, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=5.576 mm.

[0252] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 3.19 mm, the total optical length TTL of the lens assembly 10 is 13.19 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.242.

[0253] The focal length EFL of the lens assembly 10 is 9.82 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.325.

[0254] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=0.969.

[0255] The ratio of the half image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.638.

[0256] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.745.

[0257] The half field of view HFOV of the lens assembly 10 is 39.8°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.182 mm.

[0258] Table 3.1 shows the optical parameters of each lens in a camera module provided in Example 3 of the present application.

[0259]

[0260]

[0261] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0262] For specific illustrations of S1-S16, thickness, etc., please refer to the first embodiment, and will not be repeated in this embodiment.

[0263] Table 3.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 3 of the present application.

[0264]

[0265] As can be seen from Table 3.2, each lens in the lens assembly 10 is an aspherical lens, and the lens assembly 10 includes 14 aspherical surfaces. The aspherical surface type z of each lens in the lens assembly 10 can be calculated by the following aspherical surface formula:

[0266]

[0267] Wherein, z is the aspheric surface vector height, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0268] The optical parameters of the camera module 101 composed of the above-mentioned lenses can be seen in the following Table 3.3.

[0269] Table 3.3 shows the optical parameters of a camera module provided in Example 3 of the present application.

[0270]

[0271] As can be seen from Table 3.3, the lens assembly 10 provided in the third embodiment of the present application can achieve the characteristics of large aperture and large target surface in the working state, which is beneficial to improving the imaging quality and effect of the camera module 101. Moreover, when the lens assembly 10 switches to the non-working state, the compressed spacing is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 in the non-working state.

[0272] Fig. 9 This is a modulation transfer function curve diagram of a camera module provided in Example 3 of the present application.

[0273] in, Fig. 9 The horizontal axis represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridian field of view. The F1:Diff.Limit line in the figure is the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. Fig. 9 It can be seen that the camera module provided in Example 3 of the present application can achieve high-quality imaging.

[0274] Embodiment 4

[0275] Fig.10 A schematic diagram of the simulation structure of a lens assembly in a camera module provided in Embodiment 4 of the present application when in a working state.

[0276] In this embodiment, see Fig.10 As shown, the lens assembly 10 includes 7 lenses with optical power, wherein the first lens unit 110 includes 5 lenses with optical power, such as the first lens 11, the second lens 12, the third lens 13, the fourth lens 14 and the fifth lens 15. The second lens unit 120 includes 2 lenses with optical power, such as the sixth lens 16 and the seventh lens 17. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16 and the seventh lens 17 are arranged in sequence.

[0277] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, an aperture (not shown in the figure), a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a seventh lens 17, a filter 30 and an image sensor 20 are sequentially arranged. The light entering the camera module 101 passes through the lens assembly 10, the filter 30 in the above order and irradiates the image sensor 20, and finally forms an image on the photosensitive surface of the image sensor 20.

[0278] The first lens 11 may have positive optical power, at least a portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the first lens 11 corresponding to the optical axis may be a concave surface.

[0279] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0280] The third lens 13 may have positive optical power, and at least a portion of the object side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0281] The fourth lens 14 may have negative optical power, and at least a portion of the object side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0282] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0283] The sixth lens 16 may have positive power, the object side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a convex surface, and the image side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the sixth lens 16 is a complex surface.

[0284] The seventh lens 17 may have negative power, the object side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a convex surface, and the image side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the seventh lens 17 is a complex surface.

[0285] When the lens assembly 10 is in working state, see Fig.10 As shown, a large distance is maintained between the object side of the fifth lens 15 in the first lens unit 110 and the image side of the sixth lens 16 in the second lens unit 120 on the optical axis, and the lens assembly 10 can achieve high-quality imaging with a large aperture and a large target surface. When the lens assembly 10 switches from a working state to a non-working state, all the lenses of the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between the two, and reducing the length of the lens assembly 10 and the camera module 101.

[0286] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in working state.

[0287] The half-image height IMH of the lens assembly 10 is 8.30 mm, the aperture number F# of the lens assembly 10 is 1.71, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=4.854 mm.

[0288] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 2.81 mm, the total optical length TTL of the lens assembly 10 is 12.45 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.226.

[0289] The focal length EFL of the lens assembly 10 is 9.22 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.305.

[0290] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=0.993.

[0291] The ratio of the half image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.667.

[0292] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.741.

[0293] The half field of view HFOV of the lens assembly 10 is 41.99°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.30 mm.

[0294] Table 4.1 shows the optical parameters of each lens in a camera module provided in Example 4 of the present application.

[0295]

[0296] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0297] For specific illustrations of S1-S16, thickness, etc., please refer to the first embodiment, and will not be repeated in this embodiment.

[0298] Table 4.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 4 of the present application.

[0299]

[0300]

[0301] As can be seen from Table 4.2, each lens in the lens assembly 10 is an aspherical lens, and the lens assembly 10 includes 14 aspherical surfaces. The aspherical surface type z of each lens in the lens assembly 10 can be calculated by the following aspherical surface formula:

[0302]

[0303] Wherein, z is the aspheric surface vector height, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0304] The optical parameters of the camera module 101 composed of the above-mentioned lenses can be seen in the following Table 4.3.

[0305] Table 4.3 shows the optical parameters of a camera module provided in Example 4 of the present application.

[0306]

[0307] As can be seen from Table 4.3, the lens assembly 10 provided in the fourth embodiment of the present application can achieve the characteristics of large aperture and large target surface in the working state, which is beneficial to improving the imaging quality and effect of the camera module 101. Moreover, when the lens assembly 10 switches to the non-working state, the compressed spacing is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 in the non-working state.

[0308] Fig.11 This is a modulation transfer function curve diagram of a camera module provided in Example 4 of the present application.

[0309] in, Fig.11 The horizontal axis represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridian field of view. The F1:Diff.Limit line in the figure is the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. Fig.11 It can be seen that the camera module provided in Example 4 of the present application can achieve high-quality imaging.

[0310] Embodiment 5

[0311] Fig.12 A schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 5 of the present application when in a working state.

[0312] In this embodiment, see Fig.12 As shown, the lens assembly 10 includes 7 lenses with optical power, wherein the first lens unit 110 includes 5 lenses with optical power, such as the first lens 11, the second lens 12, the third lens 13, the fourth lens 14 and the fifth lens 15. The second lens unit 120 includes 2 lenses with optical power, such as the sixth lens 16 and the seventh lens 17. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16 and the seventh lens 17 are arranged in sequence.

[0313] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, an aperture (not shown in the figure), a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a seventh lens 17, a filter 30 and an image sensor 20 are sequentially arranged. The light entering the camera module 101 passes through the lens assembly 10, the filter 30 in the above order and irradiates the image sensor 20, and finally forms an image on the photosensitive surface of the image sensor 20.

[0314] The first lens 11 may have positive optical power, at least a portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the first lens 11 corresponding to the optical axis may be a concave surface.

[0315] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0316] The third lens 13 may have positive optical power, and at least a portion of the object side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0317] The fourth lens 14 may have negative optical power, and at least a portion of the object side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0318] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0319] The sixth lens 16 may have positive power, the object side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a convex surface, and the image side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the sixth lens 16 is a complex surface.

[0320] The seventh lens 17 may have negative power, the object side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a convex surface, and the image side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the seventh lens 17 is a complex surface.

[0321] When the lens assembly 10 is in working state, see Fig.12 As shown, a large distance is maintained between the object side of the fifth lens 15 in the first lens unit 110 and the image side of the sixth lens 16 in the second lens unit 120 on the optical axis, and the lens assembly 10 can achieve high-quality imaging with a large aperture and a large target surface. When the lens assembly 10 switches from a working state to a non-working state, all the lenses of the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between the two, and reducing the length of the lens assembly 10 and the camera module 101.

[0322] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in working state.

[0323] The half-image height IMH of the lens assembly 10 is 8.15 mm, the aperture number F# of the lens assembly 10 is 2.00, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=4.075 mm.

[0324] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 3.288 mm, the total optical length TTL of the lens assembly 10 is 12.288 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.27.

[0325] The focal length EFL of the lens assembly 10 is 9.21 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.36.

[0326] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=0.989.

[0327] The ratio of the half-image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.663.

[0328] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.75.

[0329] The half field of view HFOV of the lens assembly 10 is 42°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.29 mm.

[0330] Table 5.1 shows the optical parameters of each lens in a camera module provided in Example 5 of the present application.

[0331]

[0332]

[0333] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0334] For specific illustrations of S1-S16, thickness, etc., please refer to the first embodiment, and will not be repeated in this embodiment.

[0335] Table 5.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 5 of the present application.

[0336]

[0337] As can be seen from Table 5.2, each lens in the lens assembly 10 is an aspherical lens, and the lens assembly 10 includes 14 aspherical surfaces. The aspherical surface type z of each lens in the lens assembly 10 can be calculated by the following aspherical surface formula:

[0338]

[0339] Wherein, z is the aspheric surface vector height, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0340] The optical parameters of the camera module 101 composed of the above-mentioned lenses can be seen in the following Table 5.3.

[0341] Table 5.3 shows the optical parameters of a camera module provided in Example 5 of the present application.

[0342]

[0343] As can be seen from Table 5.3, the lens assembly 10 provided in the fifth embodiment of the present application can achieve the characteristics of large aperture and large target surface in the working state, which is beneficial to improving the imaging quality and effect of the camera module 101. Moreover, when the lens assembly 10 switches to the non-working state, the compressed spacing is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 in the non-working state.

[0344] Fig.13 This is a modulation transfer function curve diagram of a camera module provided in Example 5 of the present application.

[0345] in, Fig.13 The horizontal axis represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridian field of view. The F1:Diff.Limit line in the figure is the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. Fig.13 It can be seen that the camera module provided in Example 5 of the present application can achieve high-quality imaging.

[0346] Embodiment 6

[0347] Fig.14 A schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 6 of the present application when it is in a working state.

[0348] In this embodiment, see Fig.14 As shown, the lens assembly 10 includes 7 lenses with optical power, wherein the first lens unit 110 includes 5 lenses with optical power, such as the first lens 11, the second lens 12, the third lens 13, the fourth lens 14 and the fifth lens 15. The second lens unit 120 includes 2 lenses with optical power, such as the sixth lens 16 and the seventh lens 17. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16 and the seventh lens 17 are arranged in sequence.

[0349] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, an aperture (not shown in the figure), a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a seventh lens 17, a filter 30 and an image sensor 20 are sequentially arranged. The light entering the camera module 101 passes through the lens assembly 10, the filter 30 in the above order and irradiates the image sensor 20, and finally forms an image on the photosensitive surface of the image sensor 20.

[0350] The first lens 11 may have positive optical power, at least a portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the first lens 11 corresponding to the optical axis may be a concave surface.

[0351] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0352] The third lens 13 may have positive optical power, and at least a portion of the object side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0353] The fourth lens 14 may have negative optical power, and at least a portion of the object side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0354] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0355] The sixth lens 16 may have positive power, the object side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a convex surface, and the image side surface of the sixth lens 16 at least in a portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the sixth lens 16 is a complex surface.

[0356] The seventh lens 17 may have negative power, the object side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a convex surface, and the image side surface of the seventh lens 17 at least the portion corresponding to the optical axis may be a concave surface. At least one of the object side surface and the image side surface of the seventh lens 17 is a complex surface.

[0357] When the lens assembly 10 is in working state, see Fig.14 As shown, a large distance is maintained between the object side of the fifth lens 15 in the first lens unit 110 and the image side of the sixth lens 16 in the second lens unit 120 on the optical axis, and the lens assembly 10 can achieve high-quality imaging with a large aperture and a large target surface. When the lens assembly 10 switches from a working state to a non-working state, all the lenses of the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between the two, and reducing the length of the lens assembly 10 and the camera module 101.

[0358] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in working state.

[0359] The half-image height IMH of the lens assembly 10 is 8.32 mm, the aperture number F# of the lens assembly 10 is 1.71, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=4.865 mm.

[0360] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 2.7 mm, the total optical length TTL of the lens assembly 10 is 12.15 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.22.

[0361] The focal length EFL of the lens assembly 10 is 8.82 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.306.

[0362] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=1.02.

[0363] The ratio of the half image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.685.

[0364] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.726.

[0365] The half field of view HFOV of the lens assembly 10 is 43°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.22 mm.

[0366] Table 6.1 shows the optical parameters of each lens in a camera module provided in Example 6 of the present application.

[0367]

[0368] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0369] For specific illustrations of S1-S16, thickness, etc., please refer to the first embodiment, and will not be repeated in this embodiment.

[0370] Table 6.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 6 of the present application.

[0371]

[0372]

[0373] As can be seen from Table 6.2, each lens in the lens assembly 10 is an aspherical lens, and the lens assembly 10 includes 14 aspherical surfaces. The aspherical surface type z of each lens in the lens assembly 10 can be calculated by the following aspherical surface formula:

[0374]

[0375] Wherein, z is the aspheric surface vector height, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0376] The optical parameters of the camera module 101 composed of the above-mentioned lenses can be seen in the following Table 6.3.

[0377] Table 6.3 shows the optical parameters of a camera module provided in Example 6 of the present application.

[0378]

[0379] As can be seen from Table 6.3, the lens assembly 10 provided in the sixth embodiment of the present application can achieve the characteristics of large aperture and large target surface in the working state, which is beneficial to improving the imaging quality and effect of the camera module 101. Moreover, when the lens assembly 10 switches to the non-working state, the compressed spacing is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 in the non-working state.

[0380] Fig.15 This is a modulation transfer function curve diagram of a camera module provided in Example 6 of the present application.

[0381] in, Fig.15 The horizontal axis represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridian field of view. The F1:Diff.Limit line in the figure is the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. Fig.15 It can be seen that the camera module provided in Example 6 of the present application can achieve high-quality imaging.

[0382] It should be noted that the numerical values ​​and numerical ranges involved in the embodiments of the present application are approximate values ​​and may have a certain range of errors, which can be considered negligible by those skilled in the art.

[0383] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances. The terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0384] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A lens assembly, characterized in that: It includes at least a first lens unit and a second lens unit arranged in sequence from the object side to the image side along the optical axis. The first lens unit and the second lens unit each include a lens with a focal power, and the number of lenses in the first lens unit is multiple; When the lens assembly is in the working state, the lens assembly satisfies the conditional formula: IMH / F# > 4.0, where IMH is the semi-image height of the lens assembly and F# is the aperture number of the lens assembly; When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: 0.2 < GD / TTL < 0.5, where GD is the distance between the first lens unit and the second lens unit on the optical axis, and TTL is the total optical length of the lens assembly; The first lens unit is movably arranged along the optical axis, and all the lenses of the first lens unit move along the optical axis towards the second lens unit to switch the lens assembly from the working state to the non-working state.

2. The lens assembly according to claim 1, characterized in that: When the lens assembly is in the working state, the aperture number of the lens assembly satisfies: 1.1 < F# < 2.

3. The lens assembly according to claim 1 or 2, characterized in that: When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: 0.20 < GD / EFL < 0.60, where EFL is the focal length of the lens assembly.

4. The lens assembly according to any one of claims 1 to 3, characterized in that: When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: 0.9 < EFL1 / EFL < 1.1, where EFL1 is the focal length of the first lens unit.

5. The lens assembly according to any one of claims 1 to 4, characterized in that: When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: IMH / TTL < 0.

7.

6. The lens assembly according to any one of claims 1 to 5, characterized in that: When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: 0.6 < EFL / TTL < 0.

9.

7. The lens assembly according to any one of claims 1 to 6, characterized in that: When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: EFL * tan(HFOV) ≥ 8.00 mm, where HFOV is the semi-field of view angle of the lens assembly.

8. The lens assembly according to any one of claims 1 to 7, characterized in that: The number of lenses in the first lens unit is greater than or equal to 4.

9. The lens assembly according to any one of claims 1 to 8, characterized in that: The number of lenses in the second lens unit is less than or equal to 3.

10. The lens assembly according to any one of claims 1 to 9, characterized in that: It further includes an aperture, and the aperture is located on the side of the first lens unit facing the object side; The aperture is a variable aperture with a variable diameter.

11. The lens assembly according to any one of claims 1 to 10, characterized in that: The lenses of the first lens unit include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, and the lenses of the second lens unit include a sixth lens and a seventh lens; The first lens, the fifth lens, and the sixth lens each have a positive focal power, and the second lens, the fourth lens, and the seventh lens each have a negative focal power.

12. The lens assembly according to claim 11, characterized in that: At least one of the object side surface and the image side surface of the sixth lens is a toroidal surface; At least one of the object side surface and the image side surface of the seventh lens is a toroidal surface.

13. A camera module, characterized in that: It at least includes an image sensor and the lens assembly according to any one of claims 1-12 above, and the image sensor is located on the side of the lens assembly facing the image side.

14. An electronic device, characterized in that: It at least includes a housing and the camera module according to claim 13 above, and the camera module is arranged on the housing; When the lens assembly is in working state, the first lens unit of the lens assembly is at least partially located outside the housing; When the lens assembly switches from the working state to the non-working state, the first lens unit moves along the optical axis toward the inside of the housing.

Images