An electronic device

Abstract

An embodiment of the present application provides an electronic device, including a housing, a lens cover plate, and a lens assembly. The lens assembly satisfies the condition: 0.7 < IH / (4*F#) < 6, which can achieve the characteristics of a large aperture and a large target surface, effectively improving the imaging quality. The lens cover plate can move along the optical axis direction, and the entire lens assembly or at least one lens close to the object side in the lens assembly can also move along the optical axis direction. When the camera module is in a non-working state, the lens assembly and the lens cover plate are in a contracted state, reducing the total length of the lens assembly and the lens cover plate. When the camera module is in a working state, the lens cover plate moves along the optical axis direction outside the housing to create a避让 space, and the lens assembly or the lens moves in the避让 space to achieve focusing. In this way, while meeting the high-quality imaging requirements of a large aperture and a large target surface, the occupied space of the camera module in the non-working state is reduced, which is beneficial to the thinning design of the electronic device.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to an electronic device. Background Art

[0002] In recent years, with the development of camera technology, the camera modules on electronic consumer products such as mobile phones, tablets, laptops and wearable devices have gradually become smaller and thinner, and the photo-taking effects and requirements are increasingly in line with SLR cameras. The size and functional effects of camera modules have gradually become one of the important characteristics of terminal electronic devices.

[0003] At present, the camera module includes a lens assembly and an image sensor. Light can enter the camera module through the lens assembly and shine on the image sensor to form an image. In order to meet people's demand for imaging quality, the lens assembly is gradually developing towards large aperture and large target surface (target surface of the image sensor) imaging. For example, users' requirements for capturing details of scenes are gradually increasing, making the design of large aperture particularly important. In addition, the aperture of the camera module also directly affects the core functions of the camera such as night scene, video, and background blur. For lenses with large target surface and large aperture, it is usually achieved by increasing the number of optical elements (such as lenses) to provide higher design freedom.

[0004] However, the design of a large aperture and a large target surface will increase the total optical length (Tolal Track Length, abbreviated as TTL) of the lens assembly, increase the space occupied by the camera module, and is not conducive to the thinning design of electronic equipment. Summary of the invention

[0005] The present application provides an electronic device, which solves the problem that the existing lens assembly with a large aperture and a large target surface has a long total optical length and is not conducive to the thinning design of the electronic device.

[0006] The present application provides an electronic device, comprising a housing, a lens cover, and a lens assembly disposed in the housing, wherein the lens assembly comprises a plurality of lenses arranged in sequence from an object side to an image side along an optical axis direction;

[0007] The lens cover is located on a side of the lens assembly facing the object side, and the lens cover can extend out of the housing along the optical axis to form an escape space, and the entire lens assembly or at least one lens of the lens assembly close to the object side moves in the escape space along the optical axis direction;

[0008] The lens assembly satisfies the conditional formula: 0.7 < IH / (4*F#) < 6, where IH is the full holographic height of the lens assembly and F# is the f-number of the lens assembly. This can make the lens assembly have a smaller f-number and a larger full holographic height. Among them, the smaller the f-number, the larger the aperture, that is, the large aperture and large target surface performance of the lens assembly can be realized, the imaging performance of the lens assembly can be improved, and the imaging quality can be improved.

[0009] The lens cover plate can move along the optical axis direction. When the electronic device needs to be used for shooting operations, the lens cover plate can move along the optical axis direction and extend out of the housing. The camera module is in a working state. The movement of the lens cover plate creates an avoidance space. The whole lens assembly or at least one lens near the object side can move along the optical axis direction within this avoidance space to achieve the focusing function and improve the imaging quality.

[0010] After shooting is completed, the whole lens assembly or at least one lens near the object side can move along the optical axis direction towards the image sensor. The camera module is in a non-working state. The camera module can be free from the constraints of imaging requirements such as the total optical length. The lens cover plate and the lens assembly can be in a contracted state, that is, the distance between the lens cover plate and the lens assembly, as well as the distance between the lens assembly and the image sensor (or filter) can be as close as possible, reducing the occupied space of the whole camera module and meeting the thinning design requirements of the electronic device. That is to say, the camera module in the electronic device provided in this application, while meeting the high-quality imaging requirements of a large aperture and a large target surface, effectively reduces the occupied space of the camera module in the non-working state, which is beneficial to reducing the space required by the camera module in the thickness direction of the electronic device and is beneficial to the thinning design of the electronic device.

[0011] In a possible implementation manner, it further includes a cover plate driving device and a lens driving device. The cover plate driving device is used to drive the lens cover plate to move along the optical axis direction;

[0012] The lens driving device is used to drive the whole lens assembly to move along the optical axis direction, or the lens driving device is used to drive at least one lens near the object side in the lens assembly to move along the optical axis direction. The cover plate driving device and the lens driving device are two relatively independent driving devices. That is to say, the lens assembly and the lens cover plate are respectively driven by two driving devices, realizing the decoupling between the movement driving of the lens cover plate and the movement driving of the lens assembly. By controlling the lens cover plate and the lens assembly to move along the optical axis direction in a decoupled manner, the accuracy requirement of the movement driving can be effectively reduced, which helps to improve the accuracy of the movement and is convenient for control and implementation.

[0013] In a possible implementation, the telescopic ratio of the lens cover is less than 0.95, which has a good shrinking effect on the lens cover, helps to further reduce the length of the camera module when the lens cover and the lens assembly are in a retracted state, and further helps to reduce the thickness of the electronic device.

[0014] In a possible implementation, the equivalent focal length of the lens assembly is 18 mm to 30 mm. Such a relatively small equivalent focal length enables the lens assembly to have a better light gathering ability, which helps to improve the clarity and brightness of the image and improve the image quality.

[0015] In a possible implementation, the plurality of lenses all have optical power;

[0016] The lens assembly at least includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from the object side to the image side. The number of lenses is at least five, which can provide a higher degree of freedom for the design of the lens assembly and help improve the performance of the lens assembly.

[0017] In a possible implementation, the Abbe number vd1 of the first lens and the Abbe number vd2 of the second lens satisfy the condition: |vd1-vd2|>60. The Abbe number of the first lens and the Abbe number of the second lens are quite different, the first lens may be a lens with a high Abbe number, and the second lens may be a lens with a low Abbe number, so that the first lens and the second lens can be complementary and balanced in terms of dispersion ability, reduce the chromatic aberration of the imaging, and further improve the quality of the imaging.

[0018] In a possible implementation, the focal length f1 of the first lens and the total focal length f of the lens assembly satisfy the condition: 0.5≤|f1 / f|≤1.4. This helps to improve the imaging chromatic aberration of the lens assembly and further helps to improve the imaging quality of the lens assembly.

[0019] In a possible implementation, the first lens and the second lens satisfy the condition: 10 <CT1(R3+R4) / (R3-R4)<40;

[0020] Among them, CT1 is the thickness of the first lens at a portion corresponding to the optical axis, R3 is the curvature radius of the object side of the second lens, and R4 is the curvature radius of the image side of the second lens.

[0021] In this way, the shapes and positions of the first lens and the second lens can be more reasonably allocated, which facilitates the processing of the first lens and the second lens.

[0022] In a possible implementation, the number of the lenses is 5 to 10. While giving the lens assembly a higher degree of design freedom, the size of the lens assembly itself can also be reduced, which is conducive to the thinning design of electronic equipment and is easy to produce.

[0023] In a possible implementation, the lens assembly further includes a sixth lens and a seventh lens arranged in sequence from the fifth lens to the image side;

[0024] The first lens has positive optical power, the second lens has negative optical power, the third lens has negative optical power, the fourth lens has positive optical power, the fifth lens has negative optical power, the sixth lens has positive optical power, and the seventh lens has negative optical power.

[0025] In a possible implementation, at least a portion of the object side surface of the first lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the first lens corresponding to the optical axis is a concave surface;

[0026] At least a portion of the object side surface of the second lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the second lens corresponding to the optical axis is a concave surface;

[0027] At least a portion of the image side surface of the third lens corresponding to the optical axis is a concave surface;

[0028] At least a portion of the object side surface of the fourth lens corresponding to the optical axis is a convex surface;

[0029] At least a portion of the object side surface of the fifth lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the fifth lens corresponding to the optical axis is a concave surface;

[0030] At least a portion of the object side surface of the sixth lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the sixth lens corresponding to the optical axis is a concave surface;

[0031] At least a portion of the image-side surface of the seventh lens element corresponding to the optical axis is a concave surface.

[0032] The lens assembly obtained in this way has the characteristics of large aperture and large target surface, which significantly improves the imaging quality of the lens assembly.

[0033] In a possible implementation, the lens assembly further includes a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence from the second lens to the image side;

[0034] The first lens has positive optical power, the second lens has negative optical power, the third lens has positive optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, the sixth lens has negative optical power, the seventh lens has positive optical power, and the eighth lens has negative optical power.

[0035] In a possible implementation, at least a portion of the object side surface of the first lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the first lens corresponding to the optical axis is a concave surface;

[0036] At least a portion of the object side surface of the second lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the second lens corresponding to the optical axis is a concave surface;

[0037] At least a portion of the object side surface of the third lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the third lens corresponding to the optical axis is a concave surface;

[0038] At least a portion of the image side surface of the fourth lens corresponding to the optical axis is a concave surface;

[0039] At least a portion of the object side surface of the fifth lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the fifth lens corresponding to the optical axis is a convex surface;

[0040] At least a portion of the object side surface of the sixth lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the sixth lens corresponding to the optical axis is a concave surface;

[0041] At least a portion of the object side surface of the seventh lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the seventh lens corresponding to the optical axis is a concave surface;

[0042] At least a portion of the object side surface of the eighth lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the eighth lens corresponding to the optical axis is a concave surface.

[0043] The lens assembly obtained in this way has the characteristics of large aperture and large target surface, which significantly improves the imaging quality of the lens assembly.

[0044] In a possible implementation manner, an image sensor is further included, and the image sensor is located on a side of the lens assembly facing the image side.

[0045] In a possible implementation, the lens assembly rotates around a first axis with a first center point as the rotation center, the first center point coincides with the center of the image sensor, the first axis passes through the first center point, and the first axis is parallel to the photosensitive surface of the image sensor. In this way, the lens assembly can rotate around the first axis relative to the image sensor, enriching the functions of the lens assembly, making the camera module applicable to more shooting scenes and shooting requirements, and meeting the shooting diversity and functional requirements of electronic equipment.

[0046] In a possible implementation, the rotation angle of the lens assembly is +10° to -10°. This can reduce the increase in the occupied size of the lens assembly in the thickness direction due to the rotation of the lens assembly, improve the diversity of the lens assembly shooting functions, and help reduce the size of the lens assembly, meeting the design requirements of electronic equipment thinning.

[0047] In a possible implementation, the lens assembly moves along a first direction, and the first direction is parallel to the photosensitive surface of the image sensor. This enables the lens assembly to move along the first direction relative to the image sensor, enriching the functions of the lens assembly, making it applicable to more shooting scenes, better meeting the functional requirements of shooting, and enabling the electronic device to have better and richer shooting functions.

[0048] In a possible implementation, the moving distance of the lens assembly is +1 mm to -1 mm, which can reduce or avoid the image quality being affected by excessive moving distance, and ensure good image quality while meeting the requirements of multi-scene shooting.

[0049] In a possible implementation, a filter is further included, and the filter is located between the image sensor and the lens assembly. Light entering from the lens cover passes through the lens assembly and the filter in sequence before being irradiated on the image sensor. The filter can filter stray light that is not conducive to imaging and improve imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic diagram of the back structure of an electronic device provided in an embodiment of the present application;

[0051] Figure 2 A schematic structural diagram of a camera module of an electronic device in a first state provided by an embodiment of the present application;

[0052] Figure 3 A schematic structural diagram of a camera module of an electronic device in a second state provided by an embodiment of the present application;

[0053] Figure 4A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 1 of the present application when the camera module is in a first state;

[0054] Figure 5 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 1 of the present application when the camera module is in a second state;

[0055] Figure 6 A defocus curve diagram of a lens assembly of an electronic device provided in Embodiment 1 of the present application;

[0056] Figure 7 A distortion curve diagram of a lens assembly of an electronic device provided in Embodiment 1 of the present application;

[0057] Figure 8 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 2 of the present application when the camera module is in a first state;

[0058] Fig. 9 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 2 of the present application when the camera module is in a second state;

[0059] Fig.10 A defocus curve diagram of a lens assembly of an electronic device provided in Embodiment 2 of the present application;

[0060] Fig.11 A distortion curve diagram of a lens assembly of an electronic device provided in Embodiment 2 of the present application;

[0061] Fig.12 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 3 of the present application when the camera module is in a first state;

[0062] Fig.13 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 3 of the present application when the camera module is in a second state;

[0063] Fig.14 A defocus curve diagram of a lens assembly of an electronic device provided in Embodiment 3 of the present application;

[0064] Fig.15 A distortion curve diagram of a lens assembly of an electronic device provided in Embodiment 3 of the present application;

[0065] Fig.16 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 4 of the present application when the camera module is in a first state;

[0066] Fig.17 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 4 of the present application when the camera module is in a second state;

[0067] Fig.18 A defocus curve diagram of a lens assembly of an electronic device provided in Embodiment 4 of the present application;

[0068] Fig.19 A distortion curve diagram of a lens assembly of an electronic device provided in Embodiment 4 of the present application;

[0069] Fig. 20 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 5 of the present application when the camera module is in a first state;

[0070] Fig.21 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 5 of the present application when the camera module is in a second state;

[0071] Fig. 22 A defocus curve diagram of a lens assembly of an electronic device provided in Embodiment 5 of the present application;

[0072] Fig.23 This is a distortion curve diagram of a lens assembly of an electronic device provided in Example 5 of the present application.

[0073] Description of reference numerals:

[0074] 100-electronic device; 101-camera module; 10-lens assembly;

[0075] 11-first lens; 12-second lens; 13-third lens;

[0076] 14- fourth lens; 15- fifth lens; 16- sixth lens;

[0077] 17-seventh lens; 18-eighth lens; 20-lens cover;

[0078] 30-image sensor; 40-filter; 50-aperture. DETAILED DESCRIPTION

[0079] 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.

[0080] To facilitate understanding, the relevant technical terms involved in the embodiments of the present application are first explained and illustrated.

[0081] Focal length, also known as focal length, is a measure of the concentration or dispersion 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 (lens assembly) to the image plane.

[0082] Equivalent focal length, converting the focal length of lens assemblies of different target surface sizes into the focal length of the lens assembly corresponding to the 35mm photosensitive element. The converted focal length is the equivalent focal length.

[0083] The optical axis refers to the straight line passing through the centers of all the lenses in the lens assembly.

[0084] The aperture is a device used to control the amount of light that passes through the lens into an electronic device. It is usually inside the lens, and the aperture size is expressed in F# values.

[0085] The aperture number F# is a relative value obtained by dividing the focal length of the lens by the diameter of the lens (the inverse of the relative aperture). The smaller the aperture number F#, 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.

[0086] Optical power represents the ability of a lens to refract an incident parallel light beam.

[0087] Positive power means that the lens has a positive focal length and has the effect of converging light.

[0088] Negative optical power means that the lens has a negative focal length and has the effect of diverging light.

[0089] The field of view (FOV) is the angle formed by the two edges of the maximum range through which the image of the object can pass through the lens assembly, with the lens assembly as the vertex.

[0090] The object side, with the lens assembly as the boundary, the side where the object is located is the object side, and the side of the lens facing the object side is the object side of the lens.

[0091] 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 facing the image side is the image side of the lens.

[0092] Total Track Length (TTL) refers to the total length from the vertex of the first lens element disposed adjacent to the object side of the lens assembly to the imaging surface of the lens assembly, that is, the distance from the first lens element to the focal plane of the image sensor.

[0093] Image height (IH), also known as image height, refers to the total image height of the image formed by the lens assembly.

[0094] 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.

[0095] 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.

[0096] Refractive index is the ratio of the speed of light in air to the speed of light in optical materials. The higher the refractive index of the optical material, the stronger its ability to refract incident light and the thinner the lens.

[0097] Defocus refers to the blurry phenomenon caused by the focus not being on the subject.

[0098] Distortion, also known as distortion, usually refers to the degree of distortion of the image formed by the lens assembly on the object relative to the object itself. The height of the intersection of the main light of different fields of view with the Gaussian image plane after passing through the lens assembly is not equal to the ideal image height, and the difference between the two is the distortion.

[0099] An embodiment of the present application provides an electronic device, which may include but is not limited to a mobile phone, a tablet computer, a laptop computer, 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 device, a vehicle-mounted device, and other electronic devices with a camera module 101.

[0100] The following description will be given by taking the electronic device as a mobile phone as an example.

[0101] Figure 1 A schematic diagram of the back structure of an electronic device provided in an embodiment of the present application.

[0102] See also Figure 1 As shown, the electronic device 100 may include a housing 110 and a camera module 101 . The camera module 101 may be disposed on the housing 110 , and the camera module 101 may be used for capturing images.

[0103] The camera module 101 may be disposed on the front side (the side with the display screen) of the electronic device 100 for taking selfies or photographing other objects. Alternatively, the camera module 101 may be disposed on the back side (the side facing away from the display screen) of the electronic device 100 for photographing other objects, and of course, for taking selfies.

[0104] In the embodiment of the present application, the direction from the back of the electronic device 100 to the front of the electronic device 100 is the thickness direction of the electronic device 100 (eg Figure 1 in the z direction).

[0105] It should be noted that the electronic device 100 may also include other structural components, such as Figure 1 As shown in FIG. 1 , a speaker hole 120 may be provided on the housing 110 of the electronic device 100 to play sound. A data interface 130 may also be provided on the housing 110 to connect a data line.

[0106] Alternatively, in some other examples, the electronic device 100 may also include other structural components that can fully realize its functions, such as sensors, processors, circuit boards, etc., which are not limited in the embodiments of the present application.

[0107] Taking the camera module 101 located at the back of the electronic device 100 as an example, the camera module 101 may include a lens cover 20 and a lens assembly (not shown in the figure). The lens assembly may include a plurality of lenses arranged in sequence from the object side to the image side along the optical axis, and the arrangement direction of the lenses may be the same as the thickness direction of the housing 110 of the electronic device 100.

[0108] The shell 110 may include a middle frame 112 and a back cover 111 covered on the middle frame 112, wherein the lens cover 20 may be located on the back cover 111, the lens assembly 10 may be arranged on the middle frame 112, and the lens cover 20 may be located on the side of the lens assembly facing away from the display screen, that is, the lens cover 20 is located on the side of the lens assembly facing the object side.

[0109] It should be understood that the number of camera modules 101 disposed on the front or back of the electronic device 100 may be one, such as Figure 1 Alternatively, there may be multiple ones.

[0110] For example, in some examples, a plurality of camera modules 101 may be provided on the back of the electronic device 100 to enrich the camera function and improve the camera quality. Each camera module includes a lens assembly, and the plurality of lens assemblies may share a lens cover 20, that is, the lens cover 20 is located on the side of the plurality of lens assemblies facing the object side, and one lens cover 20 may cover a plurality of lens assemblies.

[0111] Among them, the performance of the lens assembly has a great influence on the image quality and imaging effect. The aperture number F value is a key indicator of the lens assembly, and the aperture number directly affects the core functions of the camera such as night scene, video, background blur, and snapshot. Moreover, since the use of a lens assembly with a large aperture (smaller aperture number F value) can increase the blurred background of the image to highlight the subject when shooting, it can increase the shutter speed and focus speed, and have better imaging quality and effect.

[0112] At the same time, the size of the target surface is also one of the key factors affecting the imaging quality. The larger the target surface, the greater the light sensitivity, the greater the image height, and the better the imaging quality. Therefore, in order to obtain better imaging quality, the size and pixels of the photosensitive surface can be increased, thereby increasing the light sensitivity. Moreover, a large aperture and a large target surface also greatly improve the brightness and resolution of the imaging. Therefore, large aperture and large target surface imaging has become one of the important development trends of lens components in electronic devices such as mobile phones.

[0113] However, in order to achieve a large aperture of the lens assembly and a large target surface to obtain a higher imaging quality, it is usually adopted to increase the number of optical elements such as lenses in the lens assembly to provide a higher degree of design freedom. Due to the limitation of the processing size of the optical elements, increasing the number of optical elements will increase the total optical length TTL of the entire camera module, which will make the camera module occupy a larger space in the thickness direction of the electronic device 100, which is not conducive to the thinning design of the electronic device 100.

[0114] Based on this, an embodiment of the present application provides an electronic device, wherein the lens assembly of the camera module has the characteristics of a large aperture and a large target surface, and can reduce the thickness of the electronic device to meet the demand for thinning of the electronic device.

[0115] Figure 2 A schematic structural diagram of a camera module of an electronic device in a first state provided by an embodiment of the present application, Figure 3 A structural schematic diagram of a camera module of an electronic device in a second state provided in an embodiment of the present application.

[0116] See also Figure 2 As shown, the camera module 101 of the electronic device 100 includes a lens cover 20 and a lens assembly 10. The camera module 101 may also include an image sensor 30, which can utilize the photoelectric conversion function of the photoelectric device to convert the light image on the photosensitive surface into an electrical signal in a corresponding proportional relationship with the light image, thereby realizing imaging.

[0117] The image sensor 30 may be located on the side of the lens assembly 10 facing the image side, in other words, the lens assembly 10 may be located between the lens cover 20 and the image sensor 30. The photosensitive surface of the image sensor 30 faces the lens assembly 10, and light enters the camera module 101 of the electronic device 100 from the lens cover 20, passes through the lens assembly 10, and is irradiated onto the photosensitive surface of the image sensor 30 to be received by the image sensor 30.

[0118] The image sensor 30 may be a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), or other devices capable of realizing a photoelectric conversion function.

[0119] The camera module 101 may further include a filter 40, which may be located between the lens assembly 10 and the image sensor 30. The filter 40 may allow light within a specific wavelength range to pass through, thereby playing a filtering role. The light entering from the lens cover 20 passes through the lens assembly 10 and the filter 40 in sequence and then shines on the image sensor 30. The filter 40 may filter out stray light that is not conducive to imaging, thereby improving imaging quality.

[0120] The camera module 101 may also include an aperture 50, which can adjust the light intensity to improve the clarity and brightness of the image and improve the image quality. The aperture 50 can be located between the lens cover 20 and the lens assembly 10, or the aperture 50 can also be located between two adjacent lenses in the lens assembly 10.

[0121] For example, taking the aperture 50 as being located between the lens cover 20 and the lens assembly 10, see Figure 2 As shown, Figure 2 The middle dotted line is the optical axis of the lens assembly 10. Along the optical axis, the lens cover 20, the aperture 50, the lens assembly 10, the filter 40 and the image sensor 30 may be arranged in sequence from the object side to the image side. Light is irradiated into the camera module 101 through the lens cover 20, and then passes through the aperture 50, the lens assembly 10, and the filter 40 in sequence before irradiating onto the photosensitive surface of the image sensor 30, so as to be received by the image sensor 30 and form an image.

[0122] The lens assembly 10 includes a plurality of lenses arranged in sequence from the object side to the image side along the optical axis, and the plurality of lenses all have optical power. For example, the lens assembly 10 may include a first lens 11, a second lens 12, a third lens 13, ... an Nth lens arranged in sequence from the object side to the image side along the optical axis, and N may be a positive integer greater than or equal to 3. The lens located at the end of the lens assembly 10 close to the object side is the first lens 11, and the lens located at the side of the first lens 11 facing the image side is the second lens 12. The first lens 11 is adjacent to the second lens 12, and the lenses are arranged in sequence to the Nth lens, and the lens located at the end of the lens assembly 10 close to the image side is the Nth lens.

[0123] See Figure 2As shown, taking the lens module 10 including seven lenses as an example, that is, N is 7, 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 from the object side to the image side.

[0124] Multiple lenses are arranged in sequence along the optical axis direction. The centers of the multiple lenses can coincide with each other, and the arrangement direction of the lenses can be consistent with the thickness direction of the electronic device 100.

[0125] Specifically, the lens module 10 satisfies the conditional formula 0.7 < IH / (4*F#) < 6, where IH is the full holographic height of the lens module, and F# is the aperture number of the lens module.

[0126] Making the full holographic height and aperture number of the lens module 10 satisfy the above conditional formula can enable the lens module 10 to have a smaller aperture number and a larger full holographic height. Among them, the smaller the aperture number, the larger the aperture, that is, the large aperture of the lens module 10 can have both large target surface performance, improving the imaging performance of the lens module 10 and the imaging quality.

[0127] Among them, the lens module 10 can move along the optical axis direction. Specifically, the entire lens module 10 can move along the optical axis direction, so that the distance between the entire lens module 10 and the image sensor 30 can be adjusted, thereby changing the image distance and realizing the focusing function.

[0128] Alternatively, one or more of the lenses in the lens module 10 can move along the optical axis direction. Specifically, at least one lens near the object side in the lens module 10 can move along the optical axis direction, that is, at least the first lens 11 can move along the optical axis direction. Taking the first lens 11 moving along the optical axis direction as an example, the movement of the first lens 11 will change the distance between the first lens 11 and the image sensor 30, and can also change the image distance of the lens module 10 to realize the focusing function.

[0129] It should be noted that the number of movable lenses in the lens module 10 can be one, or it can also be multiple. For example, both the first lens 11 and the second lens 12 can move along the optical axis direction. Among them, when multiple lenses move, they can move separately or together.

[0130] To reduce the occupied space of the above lens module 10 with a large aperture and a large target surface in the thickness direction of the electronic device 100. In the embodiment of the present application, the lens cover plate 20 can also move along the optical axis direction. Refer to Figure 2As shown, when the camera module 101 of the electronic device 100 is not used for shooting, the camera module 101 is in the first state, that is, in the first state, the camera module 101 is in a non-working state. At this time, the camera module 101 is not constrained by the imaging requirements such as the total optical length, and the lens cover 20 and the lens assembly 10 can be in a retracted state, that is, the distance between the lens cover 20 and the lens assembly 10, and between the lens assembly 10 and the image sensor 30 (or the filter 40) can be as close as possible, reducing the occupied space of the entire camera module 101, and then reducing the occupied space of the camera module 101 in the thickness direction of the electronic device 100, which is conducive to the thinning design of the electronic device 100.

[0131] When the electronic device 100 is required to perform a shooting operation, the lens cover 20 can be moved along the optical axis and extended out of the housing 110. Figure 3 As shown, the camera module 101 is in the second state. That is, in the second state, the camera module 101 is in the working state, and the lens cover 20 is in the extended state. Since the lens cover 20 moves and extends out of the housing 110, an escape space is formed between the lens cover 20 and the image sensor 30 (or the filter 40), and the lens assembly 10 as a whole or at least one lens of the lens assembly 10 close to the object side can move along the optical axis in the escape space, ensuring that when the camera module 101 is imaged from infinity to a close object distance, the lens assembly 10 has a sufficiently long focus movement distance, which satisfies the optical total length TTL required for imaging the lens assembly 10 with a large aperture and a large target surface, realizes the focusing function, and ensures the imaging quality.

[0132] That is, when the electronic device 100 needs to be used for shooting operations, the lens cover 20 can be moved along the optical axis direction and extended out of the shell 110, so that the camera module 101 is in the second state. The movement of the lens cover 20 frees up an avoidance space, and the lens assembly 10 as a whole or at least one lens close to the object side can move along the optical axis direction in the avoidance space to achieve the focusing function and improve the imaging quality.

[0133] After shooting is completed, the entire lens assembly 10 or at least one lens close to the object side can be moved toward the image sensor 30 along the optical axis, and the lens cover 20 can be retracted toward the shell 110 along the optical axis, so that the camera module 101 is in a first state. At this time, the distance between the lens cover 20 and the lens assembly 10, and between the lens assembly 10 and the image sensor 30 may not be constrained by imaging requirements such as the total optical length, and the distance may be relatively small. This reduces the size of the entire camera module 101, thereby reducing the space occupied by the camera module 101 in the thickness direction of the electronic device 100, thereby meeting the thinning design requirements of the electronic device 100.

[0134] That is to say, in the embodiment of the present application, by making the lens assembly 10 of the electronic device 100 satisfy the conditional formula 0.7 < IH / (4*F#) < 6, the lens assembly 10 has the characteristics of a large aperture and a large target surface. And when the camera module 101 of the electronic device 100 is in use, the lens cover 20 extends out of the housing 110 to form an avoidance space, and the whole lens assembly 10 or at least one lens near the object side moves along the optical axis direction to achieve focusing and meet the high-quality imaging requirements. When the camera module 101 of the electronic device 100 is not in use, the lens assembly 10 and the lens cover 20 move and contract along the optical axis direction, reducing the distances between the lens cover 20 and the lens assembly 10, and between the lens assembly 10 and the image sensor 30, and reducing the size of the camera module 101 in the thickness direction. That is, while meeting the high-quality imaging requirements of a large aperture and a large target surface, the occupied space of the camera module 101 in the thickness direction in the non-working state is effectively reduced, which is beneficial to the thinning design of the electronic device 100.

[0135] Among them, the lens assembly 10 has the performance of a large target surface and a large aperture. The camera module 101 including the lens assembly 10 can be used as the main camera of the electronic device 100 and can meet the performance requirements of the main camera.

[0136] Specifically, in the embodiment of the present application, the telescopic ratio of the lens cover 20 can be less than 0.95. The telescopic ratio of the lens cover 20 refers to the distance SL1 (refer to Figure 2 shown) between the object side surface of the lens cover 20 and the photosensitive surface of the image sensor 30 when the lens cover 20 and the lens assembly 10 are in the contracted state, that is, when the camera module 101 is in the first state, and the distance SL2 (refer to Figure 3 shown) between the object side surface of the lens cover 20 and the photosensitive surface of the image sensor 30 when the lens cover 20 extends out of the housing 110, that is, when the camera module 101 is in the second state. That is, the telescopic ratio SL of the lens cover 20 = SL1 / SL2, and the telescopic ratio SL < 0.95. It has a good contraction effect on the lens cover 20, which helps to further reduce the length size of the camera module 101 when the lens cover 20 and the lens assembly 10 are in the contracted state, and further helps to thin the electronic device 100.

[0137] It should be noted that when the camera module 101 of the electronic device 100 is in the non-working state (the first state), the lens cover 20 and the lens assembly 10 are in the contracted state. At this time, the lens cover 20 can be in the same plane as the rear cover 111 of the electronic device 100, or the lens cover 20 can also be higher or lower than the plane where the rear cover 111 is located.

[0138] To achieve the movement of the lens assembly 10 and the lens cover 20 along the optical axis, the electronic device 100 may further include a cover driving device (not shown in the figure) and a lens driving device (not shown in the figure), wherein the cover driving device is used to drive the lens cover 20 to move along the optical axis. The lens driving device is used to drive the lens assembly 10 to move along the optical axis as a whole, or the lens driving device is used to drive at least one lens near the object side of the lens assembly 10 to move along the optical axis.

[0139] The cover driving device and the lens driving device are two relatively independent driving devices, that is, the lens assembly 10 and the lens cover 20 are driven by two driving devices respectively, thereby realizing the decoupling between the movement drive of the lens cover 20 and the movement drive of the lens assembly 10. Compared with the related art in which the movement drive of the lens cover 20 and the lens assembly 10 is realized by the same driving device, the movement of the lens cover 20 and the lens assembly 10 along the optical axis is controlled separately in a decoupled manner, which can effectively reduce the precision requirement of the movement drive, help to improve the accuracy of the movement, and facilitate control.

[0140] The cover driving device may be disposed on the housing 110, or the cover driving device may also be disposed on other structural members in the electronic device 100. The cover driving device may be a driving structure having a retractable structure (e.g., memory alloy, spring, etc.), and the specific structural composition is not limited in the embodiment of the present application, and it only needs to be able to drive the cover to extend out of the housing 110 along the optical axis direction or to retract toward the housing 110.

[0141] Correspondingly, the lens driving device may also be disposed on the housing 110, or the lens driving device may also be disposed on other structural components in the electronic device 100. The lens driving device may be a driving motor, such as a focus motor, a stepping motor, a voice coil motor, etc. The specific structure is not limited in the embodiment of the present application, and it only needs to be able to drive the entire lens assembly 10 or at least one lens close to the object side to move along the optical axis.

[0142] The electronic device 100 may further include a locking device (not shown in the figure), which is used to limit the moving position of the lens cover 20. For example, the locking device may limit the position of the lens cover 20 when the camera module 101 is in the second state and the lens cover 20 is extended out of the housing 110. Alternatively, the locking device may also limit the position of the lens cover 20 when the camera module 101 is in the first state and the lens cover 20 and the lens assembly 10 are in the retracted state.

[0143] The locking device may cooperate with the lens driving device, for example, the locking device may be a blocking plate, which cooperates with the retractable structure of the lens driving device to achieve position limiting. The specific structure of the locking device may be a position limiting member such as a positioning member, a blocking plate, or other structural components that can play a position limiting role. It is not limited in the embodiment of the present application, and it only needs to achieve position limiting of the lens cover plate 20.

[0144] In addition, the number of the cover driving devices may be two or more, and the two or more cover driving devices may be symmetrically arranged to improve the balance of the driving force of the lens cover 20 and ensure the precise displacement of the lens cover 20.

[0145] The number of the locking devices may also be two or more to ensure the limiting strength of the locking device on the moving position of the lens cover 20, and further improve the accuracy of the movement of the lens cover 20. The cover drive device and the locking device may be arranged in an intermittent manner.

[0146] In the embodiment of the present application, the equivalent focal length of the lens assembly 10 can be 18 mm to 30 mm, which is relatively small. This enables the lens assembly 10 to have a better ability to gather light, which helps to improve the clarity and brightness of the image and improve the image quality.

[0147] The number of lenses of the lens assembly 10 can be at least 5, that is, the lens assembly 10 at least includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15 arranged in sequence from the object side to the image side, which can provide a higher degree of freedom for the design of the lens assembly 10 and help improve the performance of the lens assembly 10.

[0148] Of course, in some other examples, the lens assembly 10 may also include other numbers of lenses, which may be selected and set according to actual needs.

[0149] Among them, the Abbe number of the first lens 11 and the Abbe number of the second lens 12 can satisfy the condition: |vd1-vd2|>60, that is, the Abbe number of the first lens 11 and the Abbe number of the second lens 12 are quite different. The first lens 11 can be a lens with a high Abbe number, and the second lens 12 can be a lens with a low Abbe number, so that the first lens 11 and the second lens 12 can be complementary and balanced in terms of dispersion ability, reduce the chromatic aberration of the imaging, and further improve the quality of the imaging.

[0150] Among them, the total focal length f of the lens assembly 10 is the system focal length of the lens system formed by N lenses, and the total focal length of the lens assembly 10 is related to the focal lengths of the respective lenses. For example, the focal length of the first lens 11 and the total focal length of the lens assembly 10 can satisfy the conditional formula: 0.5 ≤ |f1 / f| ≤ 1.4, where f1 is the focal length of the first lens 11 and f is the total focal length of the lens assembly 10. This helps to improve the imaging chromatic aberration of the lens assembly 10 and further helps to improve the imaging quality of the lens assembly 10.

[0151] The first lens 11 and the second lens 12 can satisfy the conditional formula: 10 < CT1(R3 + R4) / (R3 - R4) < 40, where CT1 is the thickness of the corresponding part of the first lens 11 and the optical axis, R3 is the curvature radius of the object side of the second lens 12, and R4 is the curvature radius of the image side of the second lens 12. This can more reasonably distribute the shapes and positions of the first lens 11 and the second lens 12, facilitating the processing and implementation of the first lens 11 and the second lens 12.

[0152] Specifically, the number of lenses of the lens assembly 10 can be 5 to 10. While giving the lens assembly 10 a high degree of design freedom, it can also reduce the size of the lens assembly 10 itself, contribute to the thinning design of the electronic device 100, and facilitate production implementation.

[0153] Table 1 below shows the optical parameters of lens assemblies with different numbers of lenses in an electronic device provided by an embodiment of the present application.

[0154] Number of lenses 5 6 7 8 9 10 Total focal length f 8.78 8.48 8.38 8.56 9.45 9.44 Aperture number F# 1.75 1.64 1.69 1.55 1.55 1.55 Holographic High IH 15.60 16.00 16.33 16.33 18.00 18.00 FOV 81.45 84.94 87.01 85.48 85.40 85.47 Pop-up Stretch Ratio 86.0％ 86.5％ 88.9％ 85.4％ 83.4％ 83.3％ Equivalent focal length 24.35 22.94 22.20 22.67 22.71 22.68 vd1 81.6 81.6 95.1 81.6 81.6 81.6 vd2 19.2 19.2 19.2 20.4 20.4 20.4 f1 9.19 9.67 9.46 11.49 12.90 13.01 CT1 1.49 1.43 1.36 1.39 1.52 1.52 R3 7.49 9.09 9.45 7.20 7.06 6.69 R4 5.96 6.99 8.02 6.21 6.13 5.83 IH / (4*F#) 2.22 2.44 2.41 2.63 2.91 2.91 vd1-vd2 62.4 62.4 75.9 61.2 61.2 61.2 f1 / f 1.05 1.14 1.13 1.34 1.37 1.38 CT1(R3+R4) / (R3-R4) 13.07 11.00 16.51 18.75 21.48 22.03

[0155] As can be seen from Table 1, when the number of lenses included in the lens assembly 10 is 5 to 10, the full image height and the f-number of the lens assembly 10 can satisfy the conditional formula 0.7 < IH / (4*F#) < 6, enabling the lens assembly 10 to have a larger aperture and a larger target surface, achieving a design that兼顾 both a large aperture and a large target surface and improving the imaging quality. At the same time, the designs of the first lens 11 and the second lens 12 can well correct aberrations and further improve the imaging quality.

[0156] Among them, the N lenses of the lens assembly 10 can all be aspherical lenses. An aspherical lens means that the curved surface of the lens is not the same curvature but is composed of multiple curved surfaces. It can have a good compensation effect on spherical aberration and distortion aberration, and can further facilitate the realization of the large aperture performance of the lens assembly 10.

[0157] The molding material of the lens can be plastic, or the molding material of the lens can also be glass. For example, all N lenses in the lens assembly 10 can be plastic lenses, or all N lenses can also be glass lenses, or some of the N lenses can be plastic lenses and some can be glass lenses.

[0158] In an embodiment of the present application, the lens assembly 10 can also rotate. Specifically, the lens assembly 10 can rotate around a first axis with a first center point as the rotation center, wherein the first center point coincides with the center of the image sensor 30, and the first axis passes through the first center point and is parallel to the photosensitive surface of the image sensor 30.

[0159] In this way, the lens assembly 10 can rotate around the first axis relative to the image sensor 30, enriching the functions of the lens assembly 10, making the camera module 101 applicable to more shooting scenes and shooting requirements, and meeting the shooting diversity and functional requirements of the electronic device 100.

[0160] The rotation angle of the lens assembly 10 around the first axis can be +10° to -10°. For example, when the optical axis of the lens assembly 10 is perpendicular to the photosensitive surface of the image sensor 30, the rotation angle of the lens assembly 10 is 0°, and when the lens assembly 10 rotates 10° clockwise around the first axis relative to the image sensor 30, the rotation angle is +10°, and when the lens assembly 10 rotates 10° counterclockwise around the first axis relative to the image sensor 30, the rotation angle is -10°.

[0161] By making the rotation angle of the lens assembly 10 within the above range, the increase in the size occupied by the lens assembly 10 in the thickness direction due to the rotation of the lens assembly 10 can be reduced, which improves the diversity of the shooting functions of the lens assembly 10 and helps to reduce the size of the lens assembly 10, thereby meeting the thinning design requirements of the electronic device 100.

[0162] In addition, the lens assembly 10 can also move along a first direction, wherein the first direction is parallel to the photosensitive surface of the image sensor 30, that is, the first direction is perpendicular to the optical axis direction of the lens assembly 10, such as Figure 3 For example, the lens assembly 10 can move up and down relative to the image sensor 30 along the first direction, which can also enrich the functions of the lens assembly 10, so that it can be applied to more shooting scenes, better meet the functional requirements of shooting, and enable the electronic device 100 to have better and richer shooting functions.

[0163] The moving distance of the lens assembly 10 along the first direction may be +1 mm to -1 mm. For example, when the optical axis of the lens assembly 10 passes through the first center point, the moving distance of the lens assembly 10 is 0 mm, and when the lens assembly 10 moves 1 mm upward along the first direction, the moving distance of the lens assembly 10 is +1 mm, and when the lens assembly 10 moves 1 mm downward along the first direction, the moving distance of the lens assembly 10 is -1 mm.

[0164] The moving distance of the lens assembly 10 is within the above range, which can reduce or avoid the impact on imaging quality due to excessive moving distance, and ensure good imaging quality while meeting the shooting requirements of multiple scenes.

[0165] In the embodiment of the present application, the lens assembly 10 can be moved to achieve the jitter compensation during the shooting process, thereby giving the electronic device 100 the anti-shake function of shooting.

[0166] The movement of the lens assembly 10 can be driven by a lens driving device, or an anti-shake driving motor can be additionally provided in the electronic device 100. The anti-shake driving motor drives the lens assembly 10 to move, so that when shaking occurs during shooting, shaking displacement compensation is performed to achieve an anti-shake effect.

[0167] Alternatively, the image sensor 30 may be moved to achieve the shake compensation during the shooting process.

[0168] For example, a sensor driving device may be provided in the electronic device 100 to drive the image sensor 30 to move, thereby realizing jitter displacement compensation when jitter occurs during shooting, thereby achieving an anti-shake effect.

[0169] The lenses and performance parameters of the lens assembly provided in this application are described below in conjunction with specific embodiments.

[0170] Embodiment 1

[0171] Figure 4 This is a schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 1 of the present application when it is in a first state. Figure 5 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 1 of the present application when being in a second state.

[0172] In this embodiment, see Figure 4 As shown, the lens assembly 10 includes 7 lenses, and the lens assembly 10 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16 and a seventh lens 17, which are stacked in sequence from the object side to the image side along the optical axis (the dotted line in the figure).

[0173] The lens cover 20 is located on the side of the first lens 11 facing the object side, and the image sensor 30 is located on the side of the seventh lens 17 facing the image side. When the lens cover 20 and the lens assembly 10 are retracted toward the image side, Figure 4As shown, when the camera module 101 of the electronic device 100 is in the first state (non-working state), the lens cover 20 and the lens assembly 10 are in a retracted state, and the distance between the lens cover 20 and the lens assembly 10, and between the lens assembly 10 and the image sensor 30 are small.

[0174] When the lens cover 20 moves toward the object side and extends out of the housing 110, the camera module 101 of the electronic device 100 is in the second state (working state), see Figure 5 As shown, an escape space is provided between the lens cover plate 20 and the image sensor 30, and the lens assembly 10 can move along the optical axis in the escape space to achieve the focusing function and ensure the imaging quality.

[0175] The telescopic ratio SL1 / SL2 of the lens cover 20 is 0.889. When shooting, the distance range d from the object side of the lens cover 20 to the object to be photographed is greater than 130 mm.

[0176] The first lens 11 has positive optical power, the portion of the object side surface of the first lens 11 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the first lens 11 corresponding to the optical axis is a concave surface.

[0177] The focal length f1 of the first lens 11 is 9.46, the total focal length f of the lens assembly 10 is 8.38, and the ratio of the focal length f1 of the first lens 11 to the total focal length f of the lens assembly 10 may be: |f1 / f|=1.129.

[0178] The second lens 12 has negative optical power, the portion of the object side surface of the second lens 12 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the second lens 12 corresponding to the optical axis is a concave surface. The ratio of the focal length f2 of the second lens 12 to the total focal length f of the lens assembly 10 can be: |f2 / f|=10.18.

[0179] Among them, the Abbe number vd1 of the first lens 11 is 95.1, the Abbe number vd2 of the second lens 12 is 19.2, and the Abbe number vd1 of the first lens 11 and the Abbe number vd2 of the second lens 12 satisfy: vd1-vd2=75.9>60.

[0180] The thickness CT1 of the first lens 11 corresponding to the optical axis is 1.36, the curvature radius R3 of the object side of the second lens 12 is 9.45, and the curvature radius R4 of the image side of the second lens 12 is 8.02. The first lens 11 and the second lens 12 meet the following conditions: 10 <CT1(R3+R4) / (R3-R4)=16.51<40。

[0181] The third lens 13 has negative optical power, the portion of the object side surface of the third lens 13 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the third lens 13 corresponding to the optical axis is a concave surface. The ratio of the focal length f3 of the third lens 13 to the total focal length f of the lens assembly 10 can be: |f3 / f|=3.824.

[0182] The fourth lens 14 has positive power, the portion of the object side surface of the fourth lens 14 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the fourth lens 14 corresponding to the optical axis is a convex surface. The ratio of the focal length f4 of the fourth lens 14 to the total focal length f of the lens assembly 10 can be: |f4 / f|=3.191.

[0183] The fifth lens 15 has negative optical power, the portion of the object side surface of the fifth lens 15 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the fifth lens 15 corresponding to the optical axis is a concave surface. The ratio of the focal length f5 of the fifth lens 15 to the total focal length f of the lens assembly 10 can be: |f5 / f|=4.137.

[0184] The sixth lens 16 has positive power, the object side surface of the sixth lens 16 corresponding to the optical axis is a convex surface, and the image side surface of the sixth lens 16 corresponding to the optical axis is a concave surface. The ratio of the focal length f6 of the sixth lens 16 to the total focal length f of the lens assembly 10 can be: |f6 / f|=1.008.

[0185] The seventh lens 17 has negative optical power, the portion of the object side surface of the seventh lens 17 corresponding to the optical axis is a concave surface, and the portion of the image side surface of the seventh lens 17 corresponding to the optical axis is a concave surface. The ratio of the focal length f7 of the seventh lens 17 to the total focal length f of the lens assembly 10 can be: |f7 / f|=0.722.

[0186] Table 2 below shows the optical parameters of each lens in a camera module of an electronic device provided in Example 1 of the present application.

[0187]

[0188]

[0189] Wherein, CG represents the lens cover 20, L1 represents the first lens 11, L2 represents the second lens 12, L3 represents the third lens 13, L4 represents the fourth lens 14, L5 represents the fifth lens 15, L6 represents the sixth lens 16, L7 represents the seventh lens 17, and IR represents the filter 40. S1 represents the object side.

[0190] Among them, the thickness of the mirror surface (such as the image side surface or the object side surface) refers to the distance between the mirror surface and the next adjacent mirror surface along the optical axis direction in the direction from the object side to the image side. For example, the thickness in the first state or the second state corresponding to S1 indicates the distance between the object side surface of the optical element (such as the lens cover plate 20, the lens, the aperture 50 and the filter 40) and the image side surface of the optical element along the optical axis direction when the camera module 101 of the electronic device 100 is in the first state (that is, the non-working state, the lens cover plate 20 and the lens assembly 10 are retracted) or in the second state (that is, the working state, the lens cover plate 20 extends out of the housing 110).

[0191] The thickness in the first state or the second state corresponding to S2 indicates the distance along the optical axis between the image side surface of the optical element and the mirror surface of the optical element adjacent to the image side surface when the camera module 101 of the electronic device 100 is in the first state or in the second state.

[0192] For example, the thickness of the image side surface S2 of the lens cover 20 in the second state refers to the distance between the image side surface of the lens cover 20 and the diaphragm 50 along the optical axis direction after the lens cover 20 is extended out of the housing 110. The thickness of the image side surface S2 of the lens cover 20 in the first state refers to the distance between the image side surface of the lens cover 20 and the diaphragm 50 along the optical axis direction after the lens cover 20 is retracted.

[0193] The thickness of the image side S2 of the seventh lens 17 in the second state refers to the distance between the image side of the seventh lens 17 and the filter 40 along the optical axis when the camera module 101 is in the working state. The thickness of the image side S2 of the seventh lens 17 in the first state refers to the distance between the image side of the seventh lens 17 and the filter 40 along the optical axis when the camera module 101 is not in the non-working state.

[0194] Table 3 below shows the conic coefficient and aspheric coefficient of each lens of a lens assembly in an electronic device provided in Example 1 of the present application.

[0195]

[0196]

[0197] As shown in Table 3, the first lens 11 to the seventh lens 17 include 14 aspherical surfaces in total. The aspherical surface type z of each lens in the lens assembly 10 can be calculated by the following aspherical surface formula:

[0198]

[0199] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric surface coefficient. According to the obtained aspheric surface sag, each lens can be simulated and finally obtained as follows Figure 2 and Figure 3 The camera module 101 is shown.

[0200] The optical parameters of the camera module 101 composed of the above lenses can be seen in Table 4 below.

[0201] Table 4 shows the optical parameters of a camera module of an electronic device provided in Example 1 of the present application.

[0202]

[0203] It can be seen from Table 4 that the image height and aperture number of the lens assembly 10 satisfy: 0.7<IH / (4*F#)=2.41<6. The lens assembly 10 provided in the first embodiment of the present application has the characteristics of large aperture and large target surface, and the lens cover 20 has a small shrinkage ratio, which meets the thinning design requirements of the electronic device 100.

[0204] Figure 6 A defocus curve diagram of a lens assembly of an electronic device provided in Example 1 of the present application.

[0205] Specifically, Figure 6 The defocus curve of the lens assembly 10 at a spatial frequency of 80 lp / mm is shown. Figure 6 It can be seen that the modulation transfer function (MTF) of the lens assembly 10 under different fields of view is greater than 0.6 in the sagittal direction and the meridional direction, and the field curvature of different fields of view in the sagittal direction and the meridional direction is less than 6 μm. The lens assembly 10 has high imaging quality.

[0206] Figure 7 A distortion curve diagram of a lens assembly of an electronic device provided in Embodiment 1 of the present application.

[0207] See also Figure 7 As shown, the optical distortion of the lens assembly 10 is controlled within 3%, meeting the deformation difference requirement and having high imaging quality.

[0208] Embodiment 2

[0209] Figure 8 This is a schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 2 of the present application when it is in a first state. Fig. 9 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 2 of the present application when being in a second state.

[0210] In this embodiment, see Figure 8 As shown, the lens assembly 10 includes 7 lenses, and the lens assembly 10 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16 and a seventh lens 17, which are stacked in sequence from the object side to the image side along the optical axis (the dotted line in the figure).

[0211] The lens cover 20 is located on the side of the first lens 11 facing the object side, and the image sensor 30 is located on the side of the seventh lens 17 facing the image side. When the lens cover 20 and the lens assembly 10 are retracted toward the image side, the camera module 101 of the electronic device 100 is in the first state (non-working state), see Figure 8 As shown, the lens cover 20 and the lens assembly 10 are in a retracted state, and the distance between the lens cover 20 and the lens assembly 10, and between the lens assembly 10 and the image sensor 30 are relatively small.

[0212] When the lens cover 20 moves toward the object side and extends out of the housing 110, the camera module 101 of the electronic device 100 is in the second state (working state), see Fig. 9 As shown, there is an escape space between the lens cover 20 and the image sensor 30, and the lens assembly 10 can move along the optical axis in the escape space to achieve focusing.

[0213] The telescopic ratio SL1 / SL2 of the lens cover 20 is 0.889. When shooting, the distance range d from the object side of the lens cover 20 to the object to be photographed is greater than 120 mm.

[0214] The first lens 11 has positive optical power, the portion of the object side surface of the first lens 11 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the first lens 11 corresponding to the optical axis is a concave surface.

[0215] The focal length f1 of the first lens 11 is 9.94, the total focal length f of the lens assembly 10 is 7.93, and the ratio of the focal length f1 of the first lens 11 to the total focal length f of the lens assembly 10 may be: |f1 / f|=1.2524.

[0216] The second lens 12 has negative optical power, the portion of the object side surface of the second lens 12 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the second lens 12 corresponding to the optical axis is a concave surface. The ratio of the focal length f2 of the second lens 12 to the total focal length f of the lens assembly 10 can be: |f2 / f|=21.6370.

[0217] Among them, the Abbe number vd1 of the first lens 11 is 95.1, the Abbe number vd2 of the second lens 12 is 19.2, and the Abbe number vd1 of the first lens 11 and the Abbe number vd2 of the second lens 12 satisfy: vd1-vd2=75.9>60.

[0218] The thickness CT1 of the first lens 11 corresponding to the optical axis is 1.30, the curvature radius R3 of the object side of the second lens 12 is 8.39, and the curvature radius R4 of the image side of the second lens 12 is 7.70. The first lens 11 and the second lens 12 satisfy: 10 <CT1(R3+R4) / (R3-R4)=30.64<40。

[0219] The third lens 13 has negative optical power, the portion of the object side surface of the third lens 13 corresponding to the optical axis is a concave surface, and the portion of the image side surface of the third lens 13 corresponding to the optical axis is a concave surface. The ratio of the focal length f3 of the third lens 13 to the total focal length f of the lens assembly 10 can be: |f3 / f|=3.0800.

[0220] The fourth lens 14 has positive power, the portion of the object side surface of the fourth lens 14 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the fourth lens 14 corresponding to the optical axis is a convex surface. The ratio of the focal length f4 of the fourth lens 14 to the total focal length f of the lens assembly 10 can be: |f4 / f|=2.7639.

[0221] The fifth lens 15 has negative optical power, the portion of the object side surface of the fifth lens 15 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the fifth lens 15 corresponding to the optical axis is a concave surface. The ratio of the focal length f5 of the fifth lens 15 to the total focal length f of the lens assembly 10 can be: |f5 / f|=2.344.

[0222] The sixth lens 16 has positive power, the portion of the object side surface of the sixth lens 16 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the sixth lens 16 corresponding to the optical axis is a concave surface. The ratio of the focal length f6 of the sixth lens 16 to the total focal length f of the lens assembly 10 can be: |f6 / f|=0.7900.

[0223] The seventh lens 17 has negative optical power, the portion of the object side surface of the seventh lens 17 corresponding to the optical axis is a concave surface, and the portion of the image side surface of the seventh lens 17 corresponding to the optical axis is a concave surface. The ratio of the focal length f7 of the seventh lens 17 to the total focal length f of the lens assembly 10 can be: |f7 / f|=0.7404.

[0224] Table 5 below shows the optical parameters of each lens in a camera module of an electronic device provided in Example 2 of the present application.

[0225]

[0226] Among them, CG represents the lens cover 20, L1 represents the first lens 11, L2 represents the second lens 12, L3 represents the third lens 13, L4 represents the fourth lens 14, L5 represents the fifth lens 15, L6 represents the sixth lens 16, L7 represents the seventh lens 17, and IR represents the filter 40. S1 represents the object side, and S2 represents the image side.

[0227] Among them, the description of the thickness of the mirror can be found in Example 1. Specifically, the thickness in the first state or the second state corresponding to S1 represents the distance along the optical axis between the object side surface of the optical element and the image side surface of the optical element when the camera module 101 of the electronic device 100 is in the first state or in the second state.

[0228] The thickness in the first state or the second state corresponding to S2 indicates the distance along the optical axis between the image side surface of the optical element and the mirror surface of the optical element adjacent to the image side surface when the camera module 101 of the electronic device 100 is in the first state or in the second state.

[0229] Table 6 below shows the conic coefficient and aspheric coefficient of each lens of a lens assembly in an electronic device provided in Embodiment 2 of the present application.

[0230]

[0231] As shown in Table 6, the first lens 11 to the seventh lens 17 include 14 aspherical surfaces in total. The aspherical surface type z of each lens in the lens assembly 10 can be calculated by the following aspherical surface formula:

[0232]

[0233] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric surface coefficient. According to the obtained aspheric surface sag, each lens can be simulated and finally obtained as follows Figure 8 and Fig. 9 The camera module 101 is shown.

[0234] The optical parameters of the camera module 101 composed of the above lenses can be seen in Table 7 below.

[0235] Table 7 shows the optical parameters of a camera module of an electronic device provided in Example 2 of the present application.

[0236]

[0237] It can be seen from Table 7 that the image height and aperture number of the lens assembly 10 satisfy: 0.7<IH / (4*F#)=2.56<6. The lens assembly 10 provided in Example 2 of the present application has the characteristics of large aperture and large target surface, and the lens cover 20 has a small shrinkage ratio, which meets the thinning design requirements of the electronic device 100.

[0238] Fig.10 This is a defocus curve diagram of a lens assembly of an electronic device provided in Example 2 of the present application.

[0239] Specifically, Fig.10 The defocus curve of the lens assembly 10 at a spatial frequency of 80 lp / mm is shown. Fig.10 It can be seen that the modulation transfer function (MTF) of the lens assembly 10 under different fields of view is greater than 0.5 in the sagittal direction and the meridional direction, and the field curvature of different fields of view in the sagittal direction and the meridional direction is less than 3 μm. The lens assembly 10 has high imaging quality.

[0240] Fig.11 A distortion curve diagram of a lens assembly of an electronic device provided in Embodiment 2 of the present application.

[0241] See also Fig.11 As shown, the optical distortion of the lens assembly 10 is controlled within 3%, meeting the deformation difference requirement and having high imaging quality.

[0242] Embodiment 3

[0243] Fig.12 This is a schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 3 of the present application when it is in a first state. Fig.13 A schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 3 of the present application when being in a second state.

[0244] In this embodiment, see Fig.12 As shown, the lens assembly 10 includes 7 lenses, and the lens assembly 10 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16 and a seventh lens 17, which are stacked in sequence from the object side to the image side along the optical axis (the dotted line in the figure).

[0245] The lens cover 20 is located on the side of the first lens 11 facing the object side, and the image sensor 30 is located on the side of the seventh lens 17 facing the image side. When the lens cover 20 and the lens assembly 10 are retracted toward the image side, the camera module 101 of the electronic device 100 is in the first state (non-working state), see Fig.12As shown, the lens cover 20 and the lens assembly 10 are in a retracted state, and the distance between the lens cover 20 and the lens assembly 10, and between the lens assembly 10 and the image sensor 30 are relatively small.

[0246] When the lens cover 20 moves toward the object side and extends out of the housing 110, the camera module 101 of the electronic device 100 is in the second state (working state), see Fig.13 As shown, there is an escape space between the lens cover 20 and the image sensor 30, and the lens assembly 10 can move along the optical axis in the escape space to achieve focusing.

[0247] The telescopic ratio SL1 / SL2 of the lens cover 20 is 0.867. When shooting, the distance range d from the object side of the lens cover 20 to the object to be photographed is greater than 120 mm.

[0248] The first lens 11 has positive optical power, the portion of the object side surface of the first lens 11 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the first lens 11 corresponding to the optical axis is a concave surface.

[0249] The focal length f1 of the first lens 11 is 10.17, the total focal length f of the lens assembly 10 is 8.23, and the ratio of the focal length f1 of the first lens 11 to the total focal length f of the lens assembly 10 may be: |f1 / f|=1.2356.

[0250] The second lens 12 has negative optical power, the portion of the object side surface of the second lens 12 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the second lens 12 corresponding to the optical axis is a concave surface. The ratio of the focal length f2 of the second lens 12 to the total focal length f of the lens assembly 10 can be: |f2 / f|=16.0208.

[0251] Among them, the Abbe number vd1 of the first lens 11 is 81.6, the Abbe number vd2 of the second lens 12 is 19.2, and the Abbe number vd1 of the first lens 11 and the Abbe number vd2 of the second lens 12 satisfy: vd1-vd2=62.4>60.

[0252] The thickness CT1 of the first lens 11 corresponding to the optical axis is 1.30, the curvature radius R3 of the object side of the second lens 12 is 9.55, and the curvature radius R4 of the image side of the second lens 12 is 8.50. The first lens 11 and the second lens 12 satisfy: 10 <CT1(R3+R4) / (R3-R4)=22.31<40。

[0253] The third lens 13 has negative optical power, the portion of the object side surface of the third lens 13 corresponding to the optical axis is a concave surface, and the portion of the image side surface of the third lens 13 corresponding to the optical axis is a concave surface. The ratio of the focal length f3 of the third lens 13 to the total focal length f of the lens assembly 10 can be: |f3 / f|=2.5255.

[0254] The fourth lens 14 has positive power, the portion of the object side surface of the fourth lens 14 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the fourth lens 14 corresponding to the optical axis is a convex surface. The ratio of the focal length f4 of the fourth lens 14 to the total focal length f of the lens assembly 10 can be: |f4 / f|=2.8477.

[0255] The fifth lens 15 has negative optical power, the portion of the object side surface of the fifth lens 15 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the fifth lens 15 corresponding to the optical axis is a concave surface. The ratio of the focal length f5 of the fifth lens 15 to the total focal length f of the lens assembly 10 can be: |f5 / f|=1.732.

[0256] The sixth lens 16 has positive power, the object side surface of the sixth lens 16 corresponding to the optical axis is a convex surface, and the image side surface of the sixth lens 16 corresponding to the optical axis is a concave surface. The ratio of the focal length f6 of the sixth lens 16 to the total focal length f of the lens assembly 10 can be: |f6 / f|=0.6561.

[0257] The seventh lens 17 has negative optical power, the portion of the object side surface of the seventh lens 17 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the seventh lens 17 corresponding to the optical axis is a concave surface. The ratio of the focal length f7 of the seventh lens 17 to the total focal length f of the lens assembly 10 can be: |f7 / f|=0.8020.

[0258] Table 8 below shows the optical parameters of each lens in a camera module of an electronic device provided in Example 3 of the present application.

[0259]

[0260]

[0261] Among them, CG represents the lens cover 20, L1 represents the first lens 11, L2 represents the second lens 12, L3 represents the third lens 13, L4 represents the fourth lens 14, L5 represents the fifth lens 15, L6 represents the sixth lens 16, L7 represents the seventh lens 17, and IR represents the filter 40. S1 represents the object side, and S2 represents the image side.

[0262] Among them, the description of the thickness of the mirror can be found in Example 1. Specifically, the thickness in the first state or the second state corresponding to S1 represents the distance along the optical axis between the object side surface of the optical element and the image side surface of the optical element when the camera module 101 of the electronic device 100 is in the first state or in the second state.

[0263] The thickness in the first state or the second state corresponding to S2 indicates the distance along the optical axis between the image side surface of the optical element and the mirror surface of the optical element adjacent to the image side surface when the camera module 101 of the electronic device 100 is in the first state or in the second state.

[0264] Table 9 below shows the conic coefficient and aspheric coefficient of each lens of a lens assembly in an electronic device provided in Example 3 of the present application.

[0265]

[0266] As shown in Table 9, the first lens 11 to the seventh lens 17 include 14 aspherical surfaces in total. The aspherical surface type z of each lens in the lens assembly 10 can be calculated by the following aspherical surface formula:

[0267]

[0268] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric surface coefficient. According to the obtained aspheric surface sag, each lens can be simulated and finally obtained as follows Fig.12 and Fig.13 The camera module 101 is shown.

[0269] The optical parameters of the camera module 101 composed of the above lenses can be seen in Table 10 below.

[0270] Table 10 shows the optical parameters of a camera module of an electronic device provided in Example 3 of the present application.

[0271]

[0272] It can be seen from Table 10 that the image height and aperture number of the lens assembly 10 satisfy: 0.7<IH / (4*F#)=2.60<6. The lens assembly 10 provided in Example 3 of the present application has the characteristics of large aperture and large target surface, and the lens cover 20 has a small shrinkage ratio, which meets the thinning design requirements of the electronic device 100.

[0273] Fig.14 This is a defocus curve diagram of a lens assembly of an electronic device provided in Example 3 of the present application.

[0274] Specifically, Fig.14 The defocus curve of the lens assembly 10 at a spatial frequency of 80 lp / mm is shown. Fig.14It can be seen that the modulation transfer function (MTF) of the lens assembly 10 under different fields of view is greater than 0.5 in the sagittal direction and the meridional direction, and the field curvature of different fields of view in the sagittal direction and the meridional direction is less than 5 μm. The lens assembly 10 has high imaging quality.

[0275] Fig.15 This is a distortion curve diagram of a lens assembly of an electronic device provided in Example 3 of the present application.

[0276] See also Fig.15 As shown, the optical distortion of the lens assembly 10 is controlled within 3%, meeting the deformation difference requirement and having high imaging quality.

[0277] Embodiment 4

[0278] Fig.16 This is a schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 4 of the present application when it is in a first state. Fig.17 A schematic diagram of the simulation structure of a camera module of an electronic device provided in Embodiment 4 of the present application when being in a second state.

[0279] In this embodiment, see Fig.16 As shown, the lens assembly 10 includes 8 lenses, and the lens assembly 10 includes 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 and an eighth lens 18, which are arranged in sequence from the object side to the image side along the optical axis (the dotted line in the figure).

[0280] The lens cover 20 is located on the side of the first lens 11 facing the object side, and the image sensor 30 is located on the side of the eighth lens 18 facing the image side. When the lens cover 20 and the lens assembly 10 are retracted toward the image side, the camera module 101 of the electronic device 100 is in the first state (non-working state), see Fig.16 As shown, the lens cover 20 and the lens assembly 10 are in a retracted state, and the distance between the lens cover 20 and the lens assembly 10, and between the lens assembly 10 and the image sensor 30 are relatively small.

[0281] When the lens cover 20 moves toward the object side and extends out of the housing 110, the camera module 101 of the electronic device 100 is in the second state (working state), see Fig.17 As shown, there is an escape space between the lens cover 20 and the image sensor 30, and the lens assembly 10 can move along the optical axis in the escape space to achieve focusing.

[0282] The telescopic ratio SL1 / SL2 of the lens cover 20 is 0.854. When shooting, the distance range d from the object side of the lens cover 20 to the object to be photographed is greater than 120 mm.

[0283] The first lens 11 has positive optical power, the portion of the object side surface of the first lens 11 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the first lens 11 corresponding to the optical axis is a concave surface.

[0284] The focal length f1 of the first lens 11 is 11.49, the total focal length f of the lens assembly 10 is 8.56, and the ratio of the focal length f1 of the first lens 11 to the total focal length f of the lens assembly 10 may be: |f1 / f|=1.3433.

[0285] The second lens 12 has negative optical power, the portion of the object side surface of the second lens 12 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the second lens 12 corresponding to the optical axis is a concave surface. The ratio of the focal length f2 of the second lens 12 to the total focal length f of the lens assembly 10 can be: |f2 / f|=9.0453.

[0286] Among them, the Abbe number vd1 of the first lens 11 is 81.6, the Abbe number vd2 of the second lens 12 is 20.4, and the Abbe number vd1 of the first lens 11 and the Abbe number vd2 of the second lens 12 satisfy: vd1-vd2=61.2>60.

[0287] The thickness CT1 of the first lens 11 corresponding to the optical axis is 1.39, the curvature radius of the object side of the second lens 12 is R3=7.20, and the curvature radius of the image side of the second lens 12 is R4=6.21. The first lens 11 and the second lens 12 meet the following conditions: 10 <CT1(R3+R4) / (R3-R4)=18.75<40。

[0288] The third lens 13 has positive power, the portion of the object side surface of the third lens 13 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the third lens 13 corresponding to the optical axis is a concave surface. The ratio of the focal length f3 of the third lens 13 to the total focal length f of the lens assembly 10 can be: |f3 / f|=7.8441.

[0289] The fourth lens 14 has negative optical power, the portion of the object side surface of the fourth lens 14 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the fourth lens 14 corresponding to the optical axis is a concave surface. The ratio of the focal length f4 of the fourth lens 14 to the total focal length f of the lens assembly 10 can be: |f4 / f|=2.9070.

[0290] The fifth lens 15 has positive power, the portion of the object side surface of the fifth lens 15 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the fifth lens 15 corresponding to the optical axis is a convex surface. The ratio of the focal length f5 of the fifth lens 15 to the total focal length f of the lens assembly 10 can be: |f5 / f|=3.1719.

[0291] The sixth lens 16 has negative optical power, the portion of the object side surface of the sixth lens 16 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the sixth lens 16 corresponding to the optical axis is a concave surface. The ratio of the focal length f6 of the sixth lens 16 to the total focal length f of the lens assembly 10 can be: |f6 / f|=1.5416.

[0292] The seventh lens 17 has positive power, the portion of the object side surface of the seventh lens 17 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the seventh lens 17 corresponding to the optical axis is a concave surface. The ratio of the focal length f7 of the seventh lens 17 to the total focal length f of the lens assembly 10 can be: |f7 / f|=0.6172.

[0293] The eighth lens 18 has negative optical power, the portion of the object side surface of the eighth lens 18 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the eighth lens 18 corresponding to the optical axis is a concave surface. The ratio of the focal length f8 of the eighth lens 18 to the total focal length f of the lens assembly 10 can be: |f8 / f|=0.8010.

[0294] The following Table 11 shows the optical parameters of each lens in a camera module of an electronic device provided in Example 4 of the present application.

[0295]

[0296]

[0297] Wherein, CG represents the lens cover 20, L1 represents the first lens 11, L2 represents the second lens 12, L3 represents the third lens 13, L4 represents the fourth lens 14, L5 represents the fifth lens 15, L6 represents the sixth lens 16, L7 represents the seventh lens 17, L8 represents the eighth lens 18, and IR represents the filter 40. S1 represents the object side, and S2 represents the image side.

[0298] Among them, the description of the thickness of the mirror can be found in Example 1. Specifically, the thickness in the first state or the second state corresponding to S1 represents the distance along the optical axis between the object side surface of the optical element and the image side surface of the optical element when the camera module 101 of the electronic device 100 is in the first state or in the second state.

[0299] The thickness in the first state or the second state corresponding to S2 indicates the distance along the optical axis between the image side surface of the optical element and the mirror surface of the optical element adjacent to the image side surface when the camera module 101 of the electronic device 100 is in the first state or in the second state.

[0300] For example, the thickness of the image side S2 of the seventh lens 17 in the second state refers to the distance between the image side of the seventh lens 17 and the object side of the eighth lens 18 along the optical axis when the camera module 101 is in the working state, and the thickness of the image side S2 of the seventh lens 17 in the first state refers to the distance between the image side of the seventh lens 17 and the object side of the eighth lens 18 along the optical axis when the camera module 101 is not in the non-working state.

[0301] The thickness of the image side S2 of the eighth lens 18 in the second state refers to the distance between the image side of the eighth lens 18 and the filter 40 along the optical axis when the camera module 101 is in the working state. The thickness of the image side S2 of the eighth lens 18 in the first state refers to the distance between the image side of the eighth lens 18 and the filter 40 along the optical axis when the camera module 101 is not in the non-working state.

[0302] Table 12 below shows the conic coefficient and aspheric coefficient of each lens of a lens assembly in an electronic device provided in Example 4 of the present application.

[0303]

[0304]

[0305] As can be seen from Table 12, the first lens 11 to the eighth lens 18 include 16 aspherical surfaces in total. The aspherical surface type z of each lens in the lens assembly 10 can be calculated by the following aspherical surface formula:

[0306]

[0307] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric surface coefficient. According to the obtained aspheric surface sag, each lens can be simulated and finally obtained as follows Fig.16 and Fig.17 The camera module 101 is shown.

[0308] The optical parameters of the camera module 101 composed of the above-mentioned lenses can be seen in Table 13 below.

[0309] Table 13 shows the optical parameters of a camera module of an electronic device provided in Example 4 of the present application.

[0310]

[0311] It can be seen from Table 13 that the image height and aperture number of the lens assembly 10 satisfy: 0.7<IH / (4*F#)≈2.64<6. The lens assembly 10 provided in Example 4 of the present application has the characteristics of large aperture and large target surface, and the lens cover 20 has a small shrinkage ratio, which meets the thinning design requirements of the electronic device 100.

[0312] Fig.18 This is a defocus curve diagram of a lens assembly of an electronic device provided in Example 4 of the present application.

[0313] Specifically, Fig.18 The defocus curve of the lens assembly 10 at a spatial frequency of 80 lp / mm is shown. Figure 6 It can be seen that the modulation transfer function MTF of the lens assembly 10 under different fields of view is greater than 0.6 in the sagittal direction and the meridional direction, and the field curvature of different fields of view in the sagittal direction and the meridional direction is less than 5 μm. The lens assembly 10 has high imaging quality.

[0314] Fig.19 A distortion curve diagram of a lens assembly of an electronic device provided in Example 4 of the present application.

[0315] See also Fig.19 As shown, the optical distortion of the lens assembly 10 is controlled within 3%, meeting the deformation difference requirement and having high imaging quality.

[0316] Embodiment 5

[0317] Fig. 20 This is a schematic diagram of a simulation structure of a camera module of an electronic device provided in Embodiment 5 of the present application when it is in a first state. Fig.21 A schematic diagram of the simulation structure of a camera module of an electronic device provided in Embodiment 5 of the present application when being in a second state.

[0318] In this embodiment, see Fig. 20 As shown, the lens assembly 10 includes 8 lenses, and the lens assembly 10 includes 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 and an eighth lens 18, which are stacked in sequence from the object side to the image side along the optical axis (the dotted line in the figure).

[0319] The lens cover 20 is located on the side of the first lens 11 facing the object side, and the image sensor 30 is located on the side of the eighth lens 18 facing the image side. When the lens cover 20 and the lens assembly 10 are retracted toward the image side, the camera module 101 of the electronic device 100 is in the first state (non-working state), see Fig. 20As shown, the lens cover 20 and the lens assembly 10 are in a retracted state, and the distance between the lens cover 20 and the lens assembly 10, and between the lens assembly 10 and the image sensor 30 are relatively small.

[0320] When the lens cover 20 moves toward the object side and extends out of the housing 110, the camera module 101 of the electronic device 100 is in the second state (working state), see Fig.21 As shown, there is an escape space between the lens cover 20 and the image sensor 30, and the lens assembly 10 can move along the optical axis in the escape space to achieve focusing.

[0321] The telescopic ratio SL1 / SL2 of the lens cover 20 is 0.851. When shooting, the distance range d from the object side of the lens cover 20 to the object to be photographed is greater than 120 mm.

[0322] The first lens 11 has positive optical power, the portion of the object side surface of the first lens 11 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the first lens 11 corresponding to the optical axis is a concave surface.

[0323] The focal length f1 of the first lens 11 is 11.78, the total focal length f of the lens assembly 10 is 8.60, and the ratio of the focal length f1 of the first lens 11 to the total focal length f of the lens assembly 10 may be: |f1 / f|=1.3691.

[0324] The second lens 12 has negative optical power, the portion of the object side surface of the second lens 12 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the second lens 12 corresponding to the optical axis is a concave surface. The ratio of the focal length f2 of the second lens 12 to the total focal length f of the lens assembly 10 can be: |f2 / f|=9.8198.

[0325] Among them, the Abbe number vd1 of the first lens 11 is 81.6, the Abbe number vd2 of the second lens 12 is 20.4, and the Abbe number vd1 of the first lens 11 and the Abbe number vd2 of the second lens 12 satisfy: vd1-vd2=61.2>60.

[0326] The thickness CT1 of the first lens 11 corresponding to the optical axis is 1.40, the curvature radius R3 of the object side of the second lens 12 is 6.62, and the curvature radius R4 of the image side of the second lens 12 is 5.81. The first lens 11 and the second lens 12 satisfy: 10 <CT1(R3+R4) / (R3-R4)=21.45<40。

[0327] The third lens 13 has positive power, the portion of the object side surface of the third lens 13 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the third lens 13 corresponding to the optical axis is a concave surface. The ratio of the focal length f3 of the third lens 13 to the total focal length f of the lens assembly 10 can be: |f3 / f|=6.6576.

[0328] The fourth lens 14 has negative optical power, the portion of the object side surface of the fourth lens 14 corresponding to the optical axis is a concave surface, and the portion of the image side surface of the fourth lens 14 corresponding to the optical axis is a concave surface. The ratio of the focal length f4 of the fourth lens 14 to the total focal length f of the lens assembly 10 can be: |f4 / f|=2.9026.

[0329] The fifth lens 15 has positive power, the portion of the object side surface of the fifth lens 15 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the fifth lens 15 corresponding to the optical axis is a convex surface. The ratio of the focal length f5 of the fifth lens 15 to the total focal length f of the lens assembly 10 can be: |f5 / f|=3.4018.

[0330] The sixth lens 16 has negative optical power, the portion of the object side surface of the sixth lens 16 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the sixth lens 16 corresponding to the optical axis is a concave surface. The ratio of the focal length f6 of the sixth lens 16 to the total focal length f of the lens assembly 10 can be: |f6 / f|=1.5108.

[0331] The seventh lens 17 has positive power, the portion of the object side surface of the seventh lens 17 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the seventh lens 17 corresponding to the optical axis is a concave surface. The ratio of the focal length f7 of the seventh lens 17 to the total focal length f of the lens assembly 10 can be: |f7 / f|=0.6061.

[0332] The eighth lens 18 has negative optical power, the portion of the object side surface of the eighth lens 18 corresponding to the optical axis is a convex surface, and the portion of the image side surface of the eighth lens 18 corresponding to the optical axis is a concave surface. The ratio of the focal length f8 of the eighth lens 18 to the total focal length f of the lens assembly 10 can be: |f8 / f|=0.8015.

[0333] Table 14 below shows the optical parameters of each lens in a camera module of an electronic device provided in Example 5 of the present application.

[0334]

[0335]

[0336] Wherein, CG represents the lens cover 20, L1 represents the first lens 11, L2 represents the second lens 12, L3 represents the third lens 13, L4 represents the fourth lens 14, L5 represents the fifth lens 15, L6 represents the sixth lens 16, L7 represents the seventh lens 17, L8 represents the eighth lens 18, and IR represents the filter 40. S1 represents the object side, and S2 represents the image side.

[0337] Among them, the description of the thickness of the mirror can be found in Example 1. Specifically, the thickness in the first state or the second state corresponding to S1 represents the distance along the optical axis between the object side surface of the optical element and the image side surface of the optical element when the camera module 101 of the electronic device 100 is in the first state or in the second state.

[0338] The thickness in the first state or the second state corresponding to S2 indicates the distance along the optical axis between the image side surface of the optical element and the mirror surface of the optical element adjacent to the image side surface when the camera module 101 of the electronic device 100 is in the first state or in the second state.

[0339] Table 15 below shows the conic coefficient and aspheric coefficient of each lens of a lens assembly in an electronic device provided in Example 5 of the present application.

[0340]

[0341] As can be seen from Table 15, the first lens 11 to the eighth lens 18 include a total of 16 aspherical surfaces. The aspherical surface type z of each lens in the lens assembly 10 can be calculated by the following aspherical surface formula:

[0342]

[0343] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric surface coefficient. According to the obtained aspheric surface sag, each lens can be simulated and finally obtained as follows Fig. 20 and Fig.21 The camera module 101 is shown.

[0344] The optical parameters of the camera module 101 composed of the above-mentioned lenses can be seen in Table 16 below.

[0345] Table 16 shows the optical parameters of a camera module of an electronic device provided in Example 5 of the present application.

[0346]

[0347] It can be seen from Table 16 that the image height and aperture number of the lens assembly 10 satisfy: 0.7<IH / (4*F#)=2.63<6. The lens assembly 10 provided in Example 5 of the present application has the characteristics of large aperture and large target surface, and the lens cover 20 has a small shrinkage ratio, which meets the thinning design requirements of the electronic device 100.

[0348] Fig. 22 This is a defocus curve diagram of a lens assembly of an electronic device provided in Example 5 of the present application.

[0349] Specifically, Fig. 22 The defocus curve of the lens assembly 10 at a spatial frequency of 80 lp / mm is shown. Fig. 22 It can be seen that the modulation transfer function MTF of the lens assembly 10 under different fields of view is greater than 0.6 in the sagittal direction and the meridional direction, and the field curvature of different fields of view in the sagittal direction and the meridional direction is less than 5 μm. The lens assembly 10 has high imaging quality.

[0350] Fig.23 This is a distortion curve diagram of a lens assembly of an electronic device provided in Example 5 of the present application.

[0351] See also Fig.23 As shown, the optical distortion of the lens assembly 10 is controlled within 3%, meeting the deformation difference requirement and having high imaging quality.

[0352] 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.

[0353] 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.

[0354] 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. An electronic device, characterized in that: It includes a housing, a lens cover plate, and a lens assembly disposed within the housing. The lens assembly includes a plurality of lenses arranged in sequence from the object side to the image side along the optical axis direction; The lens cover plate is located on the side of the lens assembly facing the object side. The lens cover plate can extend out of the housing along the optical axis direction to form an avoidance space, and the entire lens assembly or at least one lens of the lens assembly close to the object side moves within the avoidance space along the optical axis direction; The lens assembly satisfies the conditional formula: 0.7 < IH / (4*F#) < 6, where IH is the full holographic height of the lens assembly and F# is the aperture number of the lens assembly; The plurality of lenses all have optical power; the lens assembly at least includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side; The first lens has positive optical power, the second lens has negative optical power, the third lens has negative optical power, the fourth lens has positive optical power, the fifth lens has negative optical power, the sixth lens has positive optical power, and the seventh lens has negative optical power.

2. The electronic device according to claim 1, characterized in that: It further includes a cover plate driving device and a lens driving device. The cover plate driving device is used to drive the lens cover plate to move along the optical axis direction; The lens driving device is used to drive the entire lens assembly to move along the optical axis direction, or the lens driving device is used to drive at least one lens of the lens assembly close to the object side to move along the optical axis direction.

3. The electronic device according to claim 1 or 2, characterized in that: The expansion and contraction ratio of the lens cover plate is less than 0.

95.

4. The electronic device according to claim 1 or 2, characterized in that: The equivalent focal length of the lens assembly is 18 mm to 30 mm.

5. The electronic device according to claim 1 or 2, characterized in that: The Abbe number vd1 of the first lens and the Abbe number vd2 of the second lens satisfy the conditional formula: |vd1 - vd2| > 60.

6. The electronic device according to claim 1 or 2, characterized in that: The focal length f1 of the first lens and the total focal length f of the lens assembly satisfy the conditional formula: 0.5 ≤ |f1 / f| ≤ 1.

4.

7. The electronic device according to claim 1 or 2, characterized in that: The first lens and the second lens satisfy the conditional formula: 10 < CT1(R3 + R4) / (R3 - R4) < 40; where CT1 is the thickness of the corresponding part of the first lens and the optical axis, R3 is the curvature radius of the object side surface of the second lens, and R4 is the curvature radius of the image side surface of the second lens.

8. The electronic device according to claim 1 or 2, characterized in that: The number of the lenses is 5 to 10.

9. The electronic device according to claim 1 or 2, characterized in that: At least the part of the object side surface of the first lens corresponding to the optical axis is a convex surface, and at least the part of the image side surface of the first lens corresponding to the optical axis is a concave surface; At least the part of the object side surface of the second lens corresponding to the optical axis is a convex surface, and at least the part of the image side surface of the second lens corresponding to the optical axis is a concave surface; At least the part of the image side surface of the third lens corresponding to the optical axis is a concave surface; At least the part of the object side surface of the fourth lens corresponding to the optical axis is a convex surface; At least the part of the object side surface of the fifth lens corresponding to the optical axis is a convex surface, and at least the part of the image side surface of the fifth lens corresponding to the optical axis is a concave surface; At least a portion of the object side surface of the sixth lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the sixth lens corresponding to the optical axis is a concave surface; At least a portion of the image-side surface of the seventh lens element corresponding to the optical axis is a concave surface.

10. The electronic device according to claim 1 or 2, characterized in that: The lens assembly further includes a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens arranged in sequence from the second lens to the image side; The first lens has positive optical power, the second lens has negative optical power, the third lens has positive optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, the sixth lens has negative optical power, the seventh lens has positive optical power, and the eighth lens has negative optical power.

11. The electronic device according to claim 10, characterized in that: At least a portion of the object side surface of the first lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the first lens corresponding to the optical axis is a concave surface; At least a portion of the object side surface of the second lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the second lens corresponding to the optical axis is a concave surface; At least a portion of the object side surface of the third lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the third lens corresponding to the optical axis is a concave surface; At least a portion of the image side surface of the fourth lens corresponding to the optical axis is a concave surface; At least a portion of the object side surface of the fifth lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the fifth lens corresponding to the optical axis is a convex surface; At least a portion of the object side surface of the sixth lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the sixth lens corresponding to the optical axis is a concave surface; At least a portion of the object side surface of the seventh lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the seventh lens corresponding to the optical axis is a concave surface; At least a portion of the object side surface of the eighth lens corresponding to the optical axis is a convex surface, and at least a portion of the image side surface of the eighth lens corresponding to the optical axis is a concave surface.

12. The electronic device according to claim 1 or 2, characterized in that: An image sensor is also included, and the image sensor is located on a side of the lens assembly facing the image side.

13. The electronic device according to claim 12, characterized in that: The lens assembly rotates around a first axis with a first center point as a rotation center, the first center point coincides with the center of the image sensor, the first axis passes through the first center point, and the first axis is parallel to the photosensitive surface of the image sensor.

14. The electronic device according to claim 13, characterized in that: The rotation angle of the lens assembly is +10° to -10°.

15. The electronic device according to claim 12, characterized in that: The lens assembly moves along a first direction, which is parallel to a photosensitive surface of the image sensor.

16. The electronic device according to claim 15, characterized in that: The moving distance of the lens assembly is +1mm to -1mm.

17. The electronic device according to claim 12, characterized in that: Also included is a filter, which is located between the image sensor and the lens assembly.

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