An optical lens, a camera module and an electronic device

Abstract

The application relates to the field of optical lenses, in particular to an optical lens, a camera module and an electronic device. The optical lens comprises an adjustable focal length assembly and a fixed focal length assembly arranged along a first direction; the adjustable focal length assembly comprises at least one adjustable focal length lens, and the fixed focal length assembly comprises at least one fixed shape lens; the focal length adjustment of the optical lens of the electronic device is realized by adjusting the focal length of the adjustable focal length assembly, and different shooting requirements are met. In this way, only one set of lenses can realize multiple shooting requirements, and compared with the scheme in which multiple sets of lenses are used, the area occupied by the electronic device can be effectively reduced.

Description

Technical Field

[0001] This application relates to the field of optical lenses, and more particularly to an optical lens, a camera module, and an electronic device. Background Technology

[0002] In recent years, camera functionality has become an essential feature of many electronic devices (such as smartphones), making lenses an indispensable component. To meet diverse user shooting needs, electronic devices often require lenses with different focal lengths, mounted in different locations within the device, such as vertical or horizontal arrangements. The device's casing typically includes apertures for each lens to facilitate shooting. For example, to capture distant landscapes, electronic devices generally require a wide-angle lens with a focal length of approximately 24-35mm, while a main camera lens with a focal length of approximately 35mm-70mm is needed for close-up shots. This results in a large number of lens modules, occupying significant space within the electronic device. Summary of the Invention

[0003] To address the issue of numerous lens modules occupying significant space in electronic devices, embodiments of this application provide an optical lens, a camera module, and an electronic device.

[0004] In a first aspect, embodiments of this application provide an optical lens, including an adjustable focal length assembly and a fixed focal length assembly disposed along a first direction;

[0005] The adjustable focal length assembly includes at least one adjustable focal length lens, the fixed focal length assembly includes at least one shape-fixed lens, and in a first shape, the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a first focal length, which corresponds to the focal length of a first type of lens; in a second shape, the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a second focal length, which corresponds to the focal length of a second type of lens.

[0006] In this way, multiple shooting needs can be met with just one set of lenses, which effectively reduces the area occupied by electronic devices compared to some solutions that require multiple sets of lenses.

[0007] In one possible implementation of the first aspect described above, the first type of lens includes a main camera lens, and the second type of lens includes a wide-angle lens.

[0008] In one possible implementation of the first aspect described above, the focal length of the adjustable focal length lens changes based on the applied voltage, and the focal length of the fixed focal length assembly is the focal length of a first type of lens; when at least one adjustable focal length lens is in a state without applied voltage, at least one adjustable focal length lens has a first shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a first focal length, wherein the first shape is a planar shape; when at least one adjustable focal length lens is in a state with applied first voltage, at least one adjustable focal length lens has a second shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a second focal length, wherein the second shape is a non-planar shape;

[0009] In one possible implementation of the first aspect described above, the adjustable focal length lens is a liquid lens, the shape of which changes based on the applied voltage, and the focal length of the fixed focal length assembly is the focal length of a second type of lens; when at least one adjustable focal length lens is in a state where a second voltage is applied, at least one adjustable focal length lens has a first shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a first focal length, wherein the first shape is a non-planar shape; when at least one adjustable focal length lens is in a state where no voltage is applied, at least one adjustable focal length lens has a second shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a second focal length, wherein the second shape is a planar shape.

[0010] In one possible implementation of the first aspect described above, the fixed focal length assembly includes at least four solid-state lenses, wherein the first lens in the image-to-object direction of the at least four solid-state lenses has negative optical power and the second lens has positive optical power.

[0011] In one possible implementation of the first aspect described above, the half-field angle of the optical lens satisfies the following formula:

[0012] |HFOV1-HFOV2|>7

[0013] HFOV1 is the half field of view of the optical lens when the adjustable focus assembly is under voltage; HFOV2 is the half field of view of the optical lens when the adjustable focus assembly is not under voltage.

[0014] When |HFOV1-HFOV2|>7, it is beneficial for electronic devices to have different field of view angles in different states, thus meeting different shooting needs.

[0015] In one possible implementation of the first aspect described above, the focal length of the optical lens satisfies the following formula:

[0016] f1 / f2>1.05

[0017] Where f1 is the focal length of the optical lens when the adjustable focal length assembly is under voltage; and f2 is the focal length of the optical lens when the adjustable focal length assembly is not under voltage.

[0018] When f1 / f2>1.05 is satisfied, the optical lens can achieve a sufficient optical zoom ratio, a single lens can meet the shooting requirements of different focal lengths, and the cost is reduced.

[0019] In a possible implementation of the first aspect described above, the focal length of the optical lens satisfies the following formula:

[0020] fa / f2>28

[0021] wherein fa is the focal length of the adjustable focal length lens when the adjustable focal length assembly is in a voltage-applied state; and f2 is the focal length of the optical lens when the adjustable focal length assembly is in a non-voltage-applied state.

[0022] When fa / f2>28 is satisfied, it is beneficial to adjust the light of the system, and the optical lens can have the capability of changing the field of view angle in the powered-on state.

[0023] In a possible implementation of the first aspect described above, the optical lens satisfies the following formula:

[0024] 1.4<TTL / f2<2.7

[0025] wherein TTL is the distance on the optical axis from the object side surface of the first fixed-shape lens in the direction from the object side to the image side in the fixed focal length assembly to the corresponding imaging plane of the optical lens, and f2 is the focal length of the optical lens when the adjustable focal length assembly is in a non-voltage-applied state; wherein the first fixed-shape lens is the first fixed-shape lens in the optical lens along the direction from the object side to the image side.

[0026] When 1.4<TTL / f2<2.7 is satisfied, it is beneficial for the optical imaging system to have good telephoto characteristics, while the total length of the system is reduced to realize the miniaturization of the module.

[0027] In a possible implementation of the first aspect described above, the optical lens satisfies the following formula:

[0028] 1.0<f1 / EPD1<2.5

[0029] wherein f1 is the focal length of the optical lens when the adjustable focal length assembly is in a voltage-applied state; EPD1 is the entrance pupil diameter of the optical lens when the adjustable focal length assembly is in a voltage-applied state.

[0030] When 1.0<f1 / EPD1<2.5 is satisfied, the optical lens can have an appropriate aperture size during the zoom process, avoiding the reduction of imaging quality, and helping to improve the illuminance of the imaging plane.

[0031] In a possible implementation of the first aspect described above, |f1 / f1-1| satisfies the following formula:

[0032] |f1 / f1-1|<3.1

[0033] wherein f1 is the focal length of the first fixed-shape lens in the optical lens along the direction from the image side to the object side, and f1-1 is the focal length of the second fixed-shape lens in the optical lens along the direction from the image side to the object side.

[0034] When the condition |f1 / f1-1|<3.1 is satisfied, it is beneficial to reasonably distribute the optical power of the last two lenses of the optical lens, which allows the light rays to be reasonably deflected before entering the image plane so as to reduce the incident angle, correct the system aberration, and improve the imaging quality of the system.

[0035] In a possible implementation of the above first aspect, the optical lens satisfies the following formula:

[0036] Imgh / TTL<0.8

[0037] wherein Imgh is half of the diagonal length of the effective pixel area of the electronic photosensitive element on the imaging plane corresponding to the optical lens, and TTL is the distance on the optical axis from the object side surface of the first fixed-shape lens along the direction from the object side to the image side in the fixed focal length assembly to the imaging plane corresponding to the optical lens.

[0038] When the condition Imgh / TTL<0.8 is satisfied, it is beneficial to reduce the overall size of the optical lens, while ensuring that the captured image has high pixels.

[0039] In a possible implementation of the above first aspect, the optical lens satisfies the following formula:

[0040] -2<R21 / R22*CT2<0

[0041] wherein R21 is the radius of curvature of the object side surface of the first fixed-shape lens along the direction from the object side to the image side in the fixed focal length assembly, R22 is the radius of curvature of the image side surface of the second fixed-shape lens along the direction from the object side to the image side in the fixed focal length assembly, and CT2 is the central thickness of the second fixed-shape lens along the direction from the object side to the image side in the direction of the optical axis in the fixed focal length assembly.

[0042] When the condition -2<R21 / R22*CT2<0 is satisfied, the shape of the second fixed-shape lens along the direction from the object side to the image side can be effectively controlled, so that the light rays passing through the first fixed-shape lens along the direction from the object side to the image side are well transitioned to the subsequent lens group, the aberration introduced by the first fixed-shape lens is corrected, and the imaging quality is improved.

[0043] In a possible implementation of the above first aspect, the optical lens satisfies the following formula:

[0044] 0<AT12 / ATL<3

[0045] Wherein, AT12 is the separation distance on the optical axis between the first fixedly shaped lens and the second fixedly shaped lens in the fixed focal length assembly along the direction from the object side to the image side, and ATL is the separation distance on the optical axis between the first fixedly shaped lens and the second fixedly shaped lens in the fixed focal length assembly along the direction from the image side to the object side.

[0046] When 0<AT12 / ATL<3 is satisfied, by controlling the lens gap within a reasonable range, the field curvature of the inner and outer fields of view of the optical lens can be effectively ensured, so that the off-axis field of view of the optical lens has good imaging quality.

[0047] In a possible implementation of the first aspect above, the optical lens satisfies the following formula:

[0048] 1.5<(CT2+CT3) / CTL<3.7

[0049] Wherein, CT2 is the central thickness in the optical axis direction of the second fixedly shaped lens along the direction from the object side to the image side in the fixed focal length assembly, CT3 is the central thickness in the optical axis direction of the third fixedly shaped lens along the direction from the object side to the image side in the fixed focal length assembly, and CTL is the central thickness in the optical axis direction of the first fixedly shaped lens along the direction from the image side to the object side in the fixed focal length assembly.

[0050] When 1.5<(CT2+CT3) / CTL<3.7 is satisfied, the matching of the central thickness of the second fixedly shaped lens, the central thickness of the third fixedly shaped lens and the central thickness of the last fixedly shaped lens along the direction from the object side to the image side is beneficial to reducing the thickness sensitivity of the camera module and correcting the chromatic aberration of the optical camera module.

[0051] In a second aspect, the embodiments of the present application provide a camera module, including the optical lens according to any one of the implementations of the first aspect.

[0052] In a third aspect, the embodiments of the present application provide an electronic device, including the camera module according to any one of the implementations of the second aspect.

[0053] In a possible implementation of the third aspect above, the housing of the electronic device is provided with a protective lens, the protective lens is used for protecting the optical lens, and the protective lens is the first lens along the direction from the object side to the image side in the optical lens. Brief Description of the Drawings

[0054] Figure 1A A schematic diagram of the back side of an electronic device is shown according to the present application;

[0055] Figure 1B A schematic partial structural diagram of an electronic device is shown according to the present application;

[0056] Figure 2A A schematic diagram of the structure of the optical lens 10 in the powered-on state (the state in which voltage is applied) is shown according to the first embodiment of this application;

[0057] Figure 2B A schematic diagram of the structure of the optical lens 10 in the power-off state (the state without applied voltage) is shown according to the first embodiment of this application;

[0058] Figure 2C According to the first embodiment of this application, a schematic diagram comparing the chromatic aberration correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0059] Figure 2D According to the first embodiment of this application, a schematic diagram comparing the astigmatism correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0060] Figure 2E According to the first embodiment of this application, a schematic diagram comparing the distortion correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0061] Figure 3A A schematic diagram of the structure of the optical lens 10 in the powered-on state (the state in which voltage is applied) is shown according to the second embodiment of this application;

[0062] Figure 3B A schematic diagram of the structure of the optical lens 10 in the power-off state (state without applied voltage) is shown according to the second embodiment of this application;

[0063] Figure 3C According to the second embodiment of this application, a schematic diagram comparing the chromatic aberration correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0064] Figure 3D According to the second embodiment of this application, a schematic diagram comparing the astigmatism correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0065] Figure 3E According to the second embodiment of this application, a schematic diagram comparing the distortion correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0066] Figure 4A A schematic diagram of the structure of the optical lens 10 in the powered-on state (the state in which voltage is applied) is shown according to the third embodiment of this application;

[0067] Figure 4B A schematic diagram of the structure of the optical lens 10 in the power-off state (state without applied voltage) is shown according to the third embodiment of this application;

[0068] Figure 4CAccording to the third embodiment of this application, a schematic diagram comparing the chromatic aberration correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0069] Figure 4D According to the third embodiment of this application, a schematic diagram comparing the astigmatism correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0070] Figure 4E According to the third embodiment of this application, a schematic diagram comparing the distortion correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0071] Figure 5A A schematic diagram of the structure of the optical lens 10 in the powered-on state (the state in which voltage is applied) is shown according to the fourth embodiment of this application;

[0072] Figure 5B A schematic diagram of the structure of the optical lens 10 in the power-off state (state without applied voltage) is shown according to the fourth embodiment of this application;

[0073] Figure 5C According to the fourth embodiment of this application, a schematic diagram comparing the chromatic aberration correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0074] Figure 5D According to the fourth embodiment of this application, a schematic diagram comparing the astigmatism correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0075] Figure 5E According to the fourth embodiment of this application, a schematic diagram comparing the distortion correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0076] Figure 6A A schematic diagram of the structure of the optical lens 10 in the powered-on state (the state in which voltage is applied) is shown according to the fifth embodiment of this application;

[0077] Figure 6B A schematic diagram of the structure of the optical lens 10 in the power-off state (state without applied voltage) is shown according to the fifth embodiment of this application;

[0078] Figure 6C According to the fifth embodiment of this application, a schematic diagram comparing the chromatic aberration correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0079] Figure 6D According to the fifth embodiment of this application, a schematic diagram comparing the astigmatism correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0080] Figure 6EAccording to the fifth embodiment of this application, a schematic diagram comparing the distortion correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0081] Figure 7A A schematic diagram of the structure of the optical lens 10 in the powered-on state (the state in which voltage is applied) is shown according to the sixth embodiment of this application;

[0082] Figure 7B A schematic diagram of the structure of the optical lens 10 in the power-off state (the state without applied voltage) is shown according to the sixth embodiment of this application;

[0083] Figure 7C According to the sixth embodiment of this application, a schematic diagram comparing the chromatic aberration correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0084] Figure 7D According to the sixth embodiment of this application, a schematic diagram comparing the astigmatism correction performance of the optical lens 10 in the power-on and power-off states is shown.

[0085] Figure 7E According to the sixth embodiment of this application, a schematic diagram comparing the distortion correction performance of the optical lens 10 in the power-on and power-off states is shown. Detailed Implementation

[0086] This application provides an optical lens, a camera module, and an electronic device.

[0087] For ease of understanding, the technical terms used in this application will be explained and described below.

[0088] A liquid lens is an optical element made by wrapping a liquid in an elastic thin film. It can change the shape of the liquid by voltage, thereby changing the radius of curvature of the lens and thus the focal length of the lens. The liquid can be composed of a variety of media with different refractive indices.

[0089] Focal length is the distance from the focal point to the center of the lens (optical center) when light rays parallel to the principal axis pass through a single lens.

[0090] The following example uses two lenses to illustrate how to calculate the focal length of a lens group. The focal length of the lens module, composed of the first and second lenses, satisfies the following formula:

[0091]

[0092] Where f is the focal length of the lens module composed of the first lens and the second lens, f1 is the focal length of the first lens, f2 is the focal length of the second lens, and d is the distance between the center of the first lens and the center of the second lens.

[0093] It's understandable that in a camera module, if the distance between the lenses is relatively small, approximately zero, then the camera...

[0094]

[0095] The focal length of the lens module, which consists of the first lens and the second lens, in the image module satisfies the following formula:

[0096] As can be seen from the above formula, the focal length of the lens module is related to the focal length of each lens.

[0097] Aperture value, also known as F-number (FNO), is a relative value derived from the lens's focal length divided by the lens's entrance pupil diameter (the reciprocal of the relative aperture). A smaller aperture value allows more light to enter the lens in the same unit of time. A smaller aperture value results in a shallower depth of field, blurring the background in the photograph.

[0098] Total track length (TTL) refers to the total length from the object side of the lens closest to the object side to the image plane, and is a major factor in determining the camera height.

[0099] Image-side focal length (EFL) is the effective focal length of an optical lens, which is the distance from the center of the lens to the image-side focal point.

[0100] The dispersion coefficient, also known as the Abbe number, is an index used to represent the dispersion ability of a transparent medium. Generally speaking, the higher the refractive index of the medium, the smaller the Abbe number, and the more severe the dispersion; conversely, the lower the refractive index of the medium, the larger the Abbe number, and the less severe the dispersion.

[0101] The object side is defined by the lens, with the side containing the object to be imaged being the boundary.

[0102] Image side, with the lens as the boundary, is the side where the image of the scene to be imaged is located.

[0103] Image height (ImgH) is half the diagonal length of the effective pixel area on the image sensor, which is also the image height of the imaging surface.

[0104] Entrance pupil diameter (EPD) refers to the ratio of the focal length to the aperture F-number of an optical lens.

[0105] The field of view (FOV) in optical instruments is the angle between the two edges of the lens, representing the maximum range through which the image of the target object can pass through the lens. The size of the FOV determines the field of view of the optical instrument; a larger FOV results in a wider field of view but a lower optical magnification.

[0106] Half field of view (HFOV) is half of the field of view.

[0107] Aberrations are deviations between the imaging result and the ideal imaging condition in a real optical system. Aberrations include field curvature, astigmatism, distortion, chromatic aberration, and so on.

[0108] The technical solutions in the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings.

[0109] It is understood that the electronic devices mentioned in the embodiments of this application may be mobile phones, digital tablets, laptops, cameras, video recorders, cameras, smart TVs, network monitoring equipment, motion-sensing game consoles, dashcams, reversing cameras, wearable electronic devices, small drones, 3D image capturing devices, or other forms of devices with photo or video recording functions.

[0110] As mentioned before, to meet the diverse shooting needs of users, electronic devices often require lens modules with different focal lengths, which is understandable. Below, we will use the smartphone 100 as an example to introduce some of the structures of electronic devices equipped with main camera and wide-angle lens modules.

[0111] Please see Figure 1A , Figure 1A This is a schematic diagram of the back of a mobile phone 100 as shown in this application. The mobile phone 100 includes a main camera module (not shown), a wide-angle lens module (not shown), and a housing 10. The housing 10 has vertically arranged light-transmitting holes 11 and 12. The light-incident side of the main camera module is opposite to the light-transmitting hole 11 of the housing 10 so that light can enter the main camera module through the light-transmitting hole 11. The light-incident side of the wide-angle lens module is opposite to the light-transmitting hole 12 of the housing 10 so that light can enter the wide-angle lens module through the light-transmitting hole 12.

[0112] It is understood that the above-mentioned electronic devices, including the main camera module and the wide-angle lens module, are only illustrative examples. In some solutions, the electronic devices may also be equipped with ultra-wide-angle lens modules, telephoto lens modules, etc. In this case, the lens modules will occupy a large volume of the electronic devices.

[0113] To address the issue of numerous lens modules occupying significant space in electronic devices, as mentioned above, this application provides an optical lens that can fulfill multiple shooting needs with a single lens module. The lens module in this application can consist of an adjustable focal length assembly and a fixed focal length assembly. The adjustable focal length assembly comprises one or more adjustable focal length lenses, which can be liquid lenses, T-lens, or other lenses with adjustable focal lengths. The fixed focal length assembly comprises one or more lenses with fixed shapes. Thus, by adjusting the focal length of the adjustable focal length assembly, the focal length of the electronic device's optical lens can be adjusted to meet different shooting requirements. For example, in different shooting scenarios, the shape of the liquid lens in the adjustable focus assembly can be changed by applying voltage, thereby making the focal length of the adjustable focus assembly different, and thus making the focal length of the entire optical lens meet different shooting needs. For example, if it is a shooting scenario that requires the use of a wide-angle lens, the focal length of the entire optical lens is made to meet the focal length of the wide-angle lens; if it is a shooting scenario that requires the use of the main camera lens, the focal length of the entire optical lens is made to meet the focal length of the main camera lens.

[0114] In this way, multiple shooting needs can be met with just one set of lenses, which effectively reduces the area occupied by electronic devices compared to some solutions that require multiple sets of lenses.

[0115] In this configuration, one or more adjustable focus lenses in the adjustable focus assembly and one or more fixed-shape lenses in the fixed focus assembly are arranged along a first thickness direction, which can be the direction from the object side to the image side. When the optical lens is mounted in an electronic device, the first direction can be the thickness direction of the electronic device.

[0116] It is understandable that electronic devices can apply different voltages to each adjustable focal length lens in an adjustable focal length assembly, causing each lens to take on a different shape, resulting in different focal lengths corresponding to the adjustable focal length assembly, and further enabling the focal length of the optical lens to match the focal lengths of different types of lenses, such as main cameras, wide-angle lenses, and telephoto lenses.

[0117] For example, in some embodiments, at least one adjustable focal length lens is in a first shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a first focal length, the first focal length corresponding to the focal length of a first type of lens, the first type of lens including a main camera lens;

[0118] In the second shape, at least one adjustable focal length lens is provided, and the optical lens consisting of the adjustable focal length assembly and the fixed focal length assembly has a second focal length, which corresponds to the focal length of a second type of lens, including a wide-angle lens.

[0119] In some embodiments, the focal length of the fixed focal length assembly can conform to the focal length of any type of lens.

[0120] For example, when the focal length of the fixed focal length assembly matches the focal length of the main camera lens module, and each adjustable focal length lens is in a state where no voltage is applied, each adjustable focal length lens has a first shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a first focal length, wherein the first shape is a planar shape; when the adjustable focal length lens is in a state where a first voltage is applied, at least one adjustable focal length lens has a second shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a second focal length, wherein the second shape is a non-planar shape;

[0121] It is understood that in some embodiments, different voltages can be applied to each adjustable focal length lens in the adjustable focal length assembly, so that each adjustable focal length lens has a different non-planar shape. For example, the optical parameters of each adjustable focal length lens may be different, such as different focal lengths, different thicknesses, different refractive indices, etc. That is, the first voltage mentioned in this application can refer to a set of different voltages, a set of the same voltages, or a single voltage; the second voltage can refer to a set of different voltages, a set of the same voltages, or a single voltage. The non-planar shape can refer to any shape with a focal length that is not zero, such as a convex or concave shape.

[0122] When the main camera is needed for shooting, the adjustable focus assembly can be controlled to be in a powered-off state (i.e., without applied voltage), so that all the adjustable focus lenses in the adjustable focus assembly are planar lenses. At this time, the focal length of the adjustable focus assembly is 0, and the focal length of the optical lens is the same as that of the main camera. When shooting with other types of lenses, a preset voltage (e.g., a first voltage) is applied to the adjustable focus lenses in the adjustable focus assembly, changing the focal length of the adjustable focus assembly. This allows the combined focal length of the adjustable focus assembly and the fixed focus assembly to match the focal length of the other type of lens. For example, when shooting with a wide-angle lens, a preset voltage is applied to each adjustable focus lens in the adjustable focus assembly, making each adjustable focus lens an arbitrary non-planar shape, or a combination of planar and non-planar shapes, as needed. This changes the focal length of the adjustable focus assembly, allowing the combined focal length of the adjustable focus assembly and the fixed focus assembly to match the focal length of a wide-angle lens.

[0123] For example, when the focal length of the fixed focal length assembly matches the focal length of the wide-angle lens module, and at least one adjustable focal length lens is in a state where a second voltage is applied, at least one adjustable focal length lens has a first shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a first focal length, wherein the first shape is a non-planar shape; when each adjustable focal length lens is in a state where no voltage is applied, each adjustable focal length lens has a second shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a second focal length, wherein the second shape is a planar shape.

[0124] When a wide-angle shot is needed, the adjustable focus assembly can be controlled to be in a powered-off state (i.e., without applied voltage). In this state, all the adjustable focus lenses of the assembly are planar lenses, and the focal length of the adjustable focus assembly is 0. The focal length of the optical lens at this time is the same as that of the wide-angle lens. When other types of lenses are needed, a preset voltage is applied to the adjustable focus lenses in the adjustable focus assembly, changing the focal length of the assembly. This allows the combined focal length of the adjustable focus assembly and the fixed focus assembly to match the focal length of the other type of lens. For example, when the main camera is needed, a preset voltage (e.g., a second voltage) is applied to the adjustable focus lenses in the adjustable focus assembly, causing each adjustable focus lens to be any non-planar shape, or a combination of planar and non-planar shapes, according to actual needs. This changes the focal length of the adjustable focus assembly, allowing the combined focal length of the adjustable focus assembly and the fixed focus assembly to match the focal length of the main camera.

[0125] It should be noted that the non-planar shape of the adjustable focus lens mentioned in the embodiments of this application can refer to a shape in which at least one surface of the adjustable focus lens is non-planar and has a certain curvature, such that the focal length of the adjustable focus lens is not 0. Conversely, the planar shape of the adjustable focus lens mentioned in the embodiments of this application can refer to a shape in which all surfaces of the adjustable focus lens are planar and the focal length of the adjustable focus lens is 0.

[0126] The following section uses mobile phone 100 as an example to introduce part of the structure of an electronic device equipped with the optical lens mentioned in this application.

[0127] Figure 1B A partial structural schematic diagram of a mobile phone 100 equipped with the optical lens mentioned in this application is shown.

[0128] Please see Figure 1B , Figure 1B This is a schematic diagram of the back of a mobile phone 100 as shown in this application. The mobile phone 100 includes an optical lens (not shown) mentioned in this application and a housing 20. The housing 20 is provided with a light-transmitting hole 21. The light-incident side of the optical lens is disposed opposite to the light-transmitting hole 21 of the housing 20 so that light can enter the optical lens through the light-transmitting hole 21.

[0129] The structure of camera module 1 and the settings of related optical parameters are described in detail below with reference to the attached diagram.

[0130] refer to Figure 2AThe camera module includes an optical lens 10 and a photosensitive element 20. Light from the scene passes through the optical lens 10 to form a clear image on the imaging surface, and the image is recorded by the photosensitive element 20 located on the imaging surface. The imaging surface refers to the plane on which the image of the scene is formed after being imaged by the optical lens 10. The optical lens 10 includes multiple lenses arranged sequentially from the object side to the image side, and the lenses work together to form an image with better imaging effect. The object side refers to the side where the subject is located, and the image side refers to the side where the imaging surface is located.

[0131] The camera module 1 may also include an infrared filter 30, which can be fixed on the circuit board and located between the optical lens 10 and the photosensitive element 20. It can be understood that the light passing through the optical lens 10 shines on the infrared filter 30 and is transmitted to the photosensitive element 20 through the infrared filter 30.

[0132] The optical lens 10 includes an adjustable focal length assembly and a fixed focal length assembly, which are arranged along a first direction. The adjustable focal length assembly includes one or more adjustable focal length lenses. When the adjustable focal length assembly is powered on, the focal length of the optical lens 10 composed of the adjustable focal length assembly and the fixed focal length assembly is a first focal length. When the adjustable focal length assembly is powered off, the focal length of the optical lens 10 composed of the adjustable focal length assembly and the fixed focal length assembly is a second focal length, which is the same as the focal length of the fixed focal length assembly.

[0133] Optionally, the adjustable focus assembly may include one or two adjustable focus lenses, and the fixed focus assembly may include at least four lenses. The second lens in the second lens group, located on the image-side side, has positive optical power, and the first lens on the image-side side has negative optical power.

[0134] For example, such as Figure 2A As shown, the adjustable focal length assembly may include a first adjustable focal length lens H1, and the fixed focal length assembly may include four lenses: a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4.

[0135] In some alternative embodiments, the adjustable focus assembly may include an adjustable focus lens, and the fixed focus assembly may include six lenses.

[0136] In some alternative embodiments, the adjustable focus assembly may include an adjustable focus lens, and the fixed focus assembly may include five lenses.

[0137] In some alternative embodiments, the adjustable focus assembly may include an adjustable focus lens, and the fixed focus assembly may include seven lenses.

[0138] In some alternative embodiments, the adjustable focus assembly may include two adjustable focus lenses, and the fixed focus assembly may include six lenses.

[0139] It is understood that the settings of each lens module described above are merely illustrative examples, and may be set in other ways depending on actual needs. This application does not limit the settings.

[0140] In this application embodiment, the adjustable focus assembly plays a core zoom role. This application satisfies different shooting needs by limiting the focal length of at least one lens surface in the adjustable focus assembly.

[0141] According to some embodiments, the optical lens 10 satisfies the following relationship:

[0142] |HFOV1-HFOV2|≥7

[0143] HFOV1 is the half field of view of the optical lens when the adjustable focus assembly is under voltage; HFOV2 is the half field of view of the optical lens when the adjustable focus assembly is not under voltage.

[0144] It is understandable that when |HFOV1-HFOV2|≥7, it is beneficial for electronic devices to have different field of view angles in different states, thus meeting different shooting needs.

[0145] According to some embodiments, the optical lens 10 satisfies the following relationship:

[0146] f1 / f2>1.05

[0147] Where f1 is the focal length of the optical lens when the adjustable focal length assembly is under voltage; and f2 is the focal length of the optical lens when the adjustable focal length assembly is not under voltage.

[0148] It is understandable that when f1 / f2>1.05 is met, the optical lens can achieve a sufficient optical zoom ratio, enabling a single lens to meet the shooting needs of different focal lengths and reduce costs.

[0149] According to some embodiments, the optical lens 10 satisfies the following relationship:

[0150] fa / f2>28

[0151] Wherein, fa is the focal length of the adjustable focal length lens when the adjustable focal length assembly is in the applied voltage state; f2 is the focal length of the optical lens when the adjustable focal length assembly is in the unapplied voltage state.

[0152] It is understandable that when fa / f2>28, it is beneficial to adjust the light of the system and enable the optical lens 10 to change the field of view when powered on.

[0153] According to some embodiments, the optical lens 10 satisfies the following relational expression:

[0154] 1.4<TTL / f2<2.7

[0155] Wherein, TTL is the distance on the optical axis from the object side surface of the first shape-fixed lens along the direction from the object side to the image side in the fixed focal length assembly to the corresponding image plane of the optical lens, and f2 is the focal length of the optical lens when the adjustable focal length assembly is in a non-voltage-applied state; wherein the first shape-fixed lens is the first shape-fixed lens in the optical lens along the direction from the object side to the image side.

[0156] When 1.4<TTL / f2<2.7 is satisfied, it is beneficial for the optical imaging system to have good telephoto characteristics, while effectively reducing the total length of the system to realize miniaturization of the module.

[0157] According to some embodiments, the optical lens 10 satisfies the following relational expression:

[0158] 1.0<f1 / EPD1<2.5

[0159] Wherein, f1 is the focal length of the optical lens when the adjustable focal length assembly is in a voltage-applied state; EPD1 is the entrance pupil diameter of the optical lens when the adjustable focal length assembly is in a voltage-applied state.

[0160] It can be understood that when 1.0<f1 / EPD1<2.5 is satisfied, the optical lens can have an appropriate aperture size during the zoom process, avoiding the degradation of imaging quality, and helping to improve the illuminance of the image plane.

[0161] According to some embodiments, the optical lens 10 satisfies the following relational expression:

[0162] |fl / fl-1|<3.1

[0163] Wherein, fl is the focal length of the first shape-fixed lens in the optical lens along the direction from the image side to the object side, and fl-1 is the focal length of the second shape-fixed lens in the optical lens along the direction from the image side to the object side.

[0164] It can be understood that when |fl / fl-1|<3.1 is satisfied, it is beneficial to reasonably distribute the optical power of the last two lenses of the optical lens, so that light rays can be reasonably deflected before entering the image plane to reduce the incident angle, correct system aberrations, and improve the imaging quality of the system.

[0165] According to some embodiments, the optical lens 10 satisfies the following relational expression:

[0166] Imgh / TTL<0.8

[0167] Wherein, Imgh is half of the diagonal length of the effective pixel area of the electronic photosensitive element on the imaging surface corresponding to the optical lens, and TTL is the distance on the optical axis from the object side surface of the first fixed-shape lens in the direction from the object side to the image side in the fixed focal length assembly to the imaging surface corresponding to the optical lens.

[0168] When Imgh / TTL<0.8 is satisfied, it is beneficial to reduce the overall size of the optical lens, and meanwhile ensure that the captured image has high pixels.

[0169] According to some embodiments, the optical lens 10 satisfies the following relational expression:

[0170] -2<R21 / R22*CT2<0

[0171] Wherein, R21 is the curvature radius of the object side surface of the fixed focal length assembly, R22 is the curvature radius of the image side surface of the second fixed-shape lens in the direction from the object side to the image side in the fixed focal length assembly, and CT2 is the center thickness in the optical axis direction of the second fixed-shape lens in the direction from the object side to the image side in the fixed focal length assembly.

[0172] When -2<R21 / R22*CT2<0 is satisfied, the shape of the second fixed-shape lens in the direction from the object side to the image side can be effectively controlled, so that the light passing through the first fixed-shape lens in the direction from the object side to the image side can be well transitioned to the subsequent lens group, the aberration introduced by the first fixed-shape lens can be corrected, and the imaging quality can be improved.

[0173] According to some embodiments, the optical lens 10 satisfies the following relational expression:

[0174] 0<AT12 / ATL<3

[0175] Wherein, AT12 is the separation distance on the optical axis between the first fixed-shape lens and the second fixed-shape lens in the direction from the object side to the image side in the fixed focal length assembly, and ATL is the separation distance on the optical axis between the first fixed-shape lens and the second fixed-shape lens in the direction from the image side to the object side in the fixed focal length assembly.

[0176] When 0<AT12 / ATL<3 is satisfied, by controlling the lens gap within a reasonable range, the field curvature of the inner and outer fields of view of the optical lens can be effectively ensured, so that the off-axis field of view of the optical lens has good imaging quality.

[0177] According to some embodiments, the optical lens 10 satisfies the following relational expression:

[0178] 1.5<(CT2+CT3) / CTL<3.7

[0179] Among them, CT2 is the center thickness of the second shape fixed lens in the fixed focal length assembly, which is in the direction from the object side to the image side, in the optical axis direction; CT3 is the center thickness of the third shape fixed lens in the fixed focal length assembly, which is in the direction from the object side to the image side, in the optical axis direction; and CTL is the center thickness of the first shape fixed lens in the fixed focal length assembly, which is in the direction from the image side to the object side, in the optical axis direction.

[0180] When 1.5 < (CT2 + CT3) / CTL < 3.7 is satisfied, by matching the center thickness of the second shape fixed lens, the center thickness of the third shape fixed lens, and the center thickness of the last shape fixed lens along the object side to the image side, it is beneficial to reduce the thickness sensitivity of the camera module and to correct the chromatic aberration of the optical camera module.

[0181] It is understood that the different restrictions on the various parameters of the optical lens 10 mentioned above can exist independently or in combination. When all the above restrictions are combined, the optical lens 10 can achieve better image quality.

[0182] Understandable. Figure 2A Only some components of camera module 1 are shown schematically; the actual shape, size, and construction of these components are not subject to change. Figure 2A limited.

[0183] The optical lens 10 provided in this application will be described in detail below with reference to Embodiments 1-6. In Embodiments 1-6, the focal length of the fixed focal length assembly conforms to the focal length of a wide-angle lens. Embodiments 1-6 are illustrated using an adjustable focal length lens as a liquid lens and a fixed-shape lens as an example. It should be noted that the adjustable focal length lens can be a liquid lens, a T-lens, or other lenses with adjustable focal length; this application does not limit the specific type of lens.

[0184] Example 1

[0185] Figure 2A This diagram illustrates the structure of the optical lens 10 in the powered-on state (state with applied voltage) according to Embodiment 1 of this application. The optical lens 10 includes an adjustable focal length assembly and a fixed focal length assembly. Specifically, the adjustable focal length assembly and the fixed focal length assembly are arranged sequentially from the object side to the image side. The adjustable focal length assembly includes a first liquid lens H1, and the fixed focal length assembly may include a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4. Figure 2A As can be seen from the above, the first liquid lens H1 is non-planar in the powered-on state.

[0186] Figure 2BThis diagram illustrates the structure of the optical lens 10 in Embodiment 1 of this application in the powered-off state (state without applied voltage). Figure 2B As shown, in the powered-off state, the first liquid lens H1 is planar. The focal length of the optical lens 10 is the same as that of the fixed focal length assembly.

[0187] The optical design parameters of the optical lens 10 in the first embodiment of this application are shown in Table 1. Table 1 shows the surface type of each surface of each lens in the optical lens, the Y radius in the powered-on state and powered-off state, the thickness of each surface, the refractive index of each surface, the Abbe number of each surface, the focal length of the adjustable focal length assembly, and the focal length of each lens in the fixed focal length assembly.

[0188] Table 1 Optical design parameters of the optical lens 10 in the first embodiment

[0189]

[0190]

[0191] The meanings of each symbol in Table 1 are as follows:

[0192] S1: First surface of the first liquid lens; S2: Second surface of the first liquid lens; S3: Third surface of the first liquid lens; S4: Fourth surface of the first liquid lens; S5: Fifth surface of the first liquid lens; S7: Object-side surface of the first lens L1; S8: Image-side surface of the first lens L1; S9: Object-side surface of the second lens L2; ​​S10: Image-side surface of the second lens L2; ​​S11: Object-side surface of the third lens L3; S12: Image-side surface of the third lens L3; S13: Object-side surface of the fourth lens L4; S14: Image-side surface of the fourth lens L4; S15: Object-side surface of the infrared cut-off filter; S16: Image-side surface of the infrared cut-off filter.

[0193] As can be seen from Table 1, when the adjustable focus assembly is powered on (with voltage applied), the image-side focal length EFL1 of the optical lens 10 is 2.40, the aperture value FNO1 is 1.97, the half field of view HFOV1 is 42°, and the total optical length TTL is 3.12. When the adjustable focus assembly is powered off (without voltage applied), the image-side focal length EFL2 of the optical lens 10 is 2.07, the aperture value FNO2 is 1.98, and the half field of view HFOV2 is 51°.

[0194] The aspherical coefficient of the optical lens 10 in the first embodiment of this application is shown in Table 2.

[0195] Table 2 Aspherical coefficients of the optical lens 10 in the first embodiment

[0196]

[0197]

[0198] Where K represents the conic coefficient in the aspherical curve equation, and A4, A6, A8, A10, A12, A14, A16, and A18 represent the 4th, 6th, 8th, 10th, 12th, 14th, 16th, and 18th order aspherical coefficients of each surface. Surface numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14 correspond to the lens surfaces S1, S2, S3, S4, S5, aperture, S7, S8, S9, S10, S11, S12, S13, and S14, respectively. It should be noted that all parameters in the table are expressed in scientific notation. In this application, the symbols K, A4, A6, A8, A10, A12, A14, A16, and A18, when they appear again thereafter, will have the same meaning as here unless otherwise explained, and will not be repeated hereafter.

[0199] In this embodiment, the object-side surface of the first lens L1 is convex near the optical axis, and the image-side surface is concave near the optical axis; the object-side surface of the second lens L2 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the third lens L3 is concave near the optical axis, and the image-side surface is convex near the optical axis; and the object-side surface of the fourth lens L4 is convex near the optical axis, and the image-side surface is concave near the optical axis.

[0200] The first lens L1 has a positive optical power, the second lens L2 has a negative optical power, the third lens L3 has a positive optical power, and the fourth lens L4 has a negative optical power.

[0201] In the embodiments of this application, when the adjustable focus assembly is powered on (with voltage applied), the half field of view HFOV1 = 42°, and when the adjustable focus assembly is powered off (without voltage applied), the half field of view HFOV2 = 51°, and |HFOV1-HFOV2| = 9°.

[0202] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 2.4, and when the adjustable focus assembly is powered off (no voltage applied), the focal length of the optical lens is f2 = 2.07, and f1 / f2 = 1.16.

[0203] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the adjustable focus lens is fa = 367.26. When the adjustable focus assembly is powered off (voltage not applied), the focal length of the optical lens is f2 = 2.07, and fa / f2 = 177.42.

[0204] In this embodiment, when the adjustable focus assembly is powered on (voltage applied), the distance TTL from the object side of the first fixed-shape lens (i.e., the first lens L1) to the imaging surface corresponding to the optical lens along the object side to the image side direction is 3.12. When the adjustable focus assembly is powered off (voltage not applied), the focal length f2 of the optical lens is 2.07, and TTL / f2 is 1.51.

[0205] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 2.4. When the adjustable focus assembly is in the voltage applied state, the entrance pupil diameter of the optical lens is EPD1 = 1.22, and f1 / EPD1 = 1.97.

[0206] In the embodiments of this application, when the adjustable focal length assembly is powered on (the state in which voltage is applied), the focal length of the first shape-fixed lens (i.e., the fourth lens L4) in the direction from the image side to the object side is f1 = -3.8, the focal length of the second shape-fixed lens (i.e., the third lens L3) in the direction from the image side to the object side is f1-1 = 2.45, and |fl / fl-1| = 1.55.

[0207] In this embodiment of the application, half the diagonal length of the effective pixel area of ​​the electronic photosensitive element on the imaging surface corresponding to the optical lens is Imgh = 2.4, the distance on the optical axis from the object side of the first shape-fixed lens (i.e., the first lens L1) to the imaging surface corresponding to the optical lens is TTL = 3.12, and Imgh / TTL = 0.77.

[0208] In this embodiment of the application, R21 / R22*CT2=-0.68, where R21 is the radius of curvature of the object side of the first fixed-shape lens (i.e., the first lens L1) in the fixed-focus assembly along the object side to the image side, R22 is the radius of curvature of the image side of the second fixed-shape lens (i.e., the second lens L2) in the fixed-focus assembly along the object side to the image side, and CT2 is the center thickness of the second fixed-shape lens (i.e., the second lens L2) in the optical axis direction in the fixed-focus assembly along the object side to the image side.

[0209] In the embodiments of this application, the distance AT12 between the first shape-fixed lens (i.e., the first lens L1) and the second shape-fixed lens (i.e., the second lens L2) along the object-side to image-side direction is 0.21. The distance ATL between the first shape-fixed lens (i.e., the fourth lens L4) and the second shape-fixed lens (i.e., the third lens L3) along the image-side to object-side direction in the fixed focal length assembly is 0.41. AT12 / ATL = 0.51.

[0210] In this embodiment of the application, (CT2+CT3) / CTL=2.38, where CT2 is the center thickness of the second shape-fixed lens (i.e., the second lens L2) in the fixed focal length assembly along the object side to the image side in the optical axis direction, CT3 is the center thickness of the third shape-fixed lens (i.e., the third lens L3) in the fixed focal length assembly along the object side to the image side in the optical axis direction, and CTL is the center thickness of the first shape-fixed lens (i.e., the fourth lens L4) in the fixed focal length assembly along the image side to the object side in the optical axis direction.

[0211] Figure 2C , Figure 2D , Figure 2E The optical performance of the optical lens 10 according to the first embodiment is shown, wherein Figure 2C , Figure 2D , Figure 2E The left figure in the figure represents the optical performance of the optical lens 10 when it is powered on (when voltage is applied), and the right figure represents the optical performance of the optical lens 10 when it is powered off (when no voltage is applied).

[0212] Figure 2C The diagram illustrates the axial chromatic aberration of the optical lens 10 in the first embodiment when light with wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm passes through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The vertical axis represents the normalized pupil coordinates, and the horizontal axis represents the axial chromatic aberration, with units in millimeters. Figure 2C A comparison of the left and right images shows that, in this embodiment, the axial chromatic aberration of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0213] Figure 2D The diagram illustrates the astigmatism of the optical lens 10 in the first embodiment when light with a wavelength of 555nm passes through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The solid line represents the meridional astigmatism of 555nm light passing through the optical lens 10, and the dashed line represents the sagittal astigmatism. The vertical axis represents the image height, and the horizontal axis represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, in millimeters. Figure 2D A comparison of the left and right images shows that, in this embodiment, the astigmatism of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0214] Figure 2EThe diagram illustrates the distortion of the optical lens 10 in the first embodiment when light with a wavelength of 555nm passes through it in a powered-on state (with voltage applied) and a powered-off state (without voltage applied). The vertical axis represents image height, and the horizontal axis represents the optical distortion value corresponding to different fields of view, expressed as a percentage. Figure 2E As can be seen from the comparison between the left and right figures, in this embodiment, the distortion of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0215] Example 2

[0216] Figure 3A This diagram illustrates the structure of the optical lens 10 in the powered-on state (state with applied voltage) according to Embodiment 2 of this application. The optical lens 10 includes an adjustable focal length assembly and a fixed focal length assembly. Specifically, the adjustable focal length assembly and the fixed focal length assembly are arranged sequentially from the object side to the image side. The adjustable focal length assembly includes a first liquid lens H1, and the fixed focal length assembly may include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6. Figure 3A As can be seen from the above, the first liquid lens H1 is non-planar in the powered-on state.

[0217] Figure 3B This diagram illustrates the structure of the optical lens 10 in Embodiment 2 of this application in the power-off state (state without applied voltage). Figure 3B As shown, in the powered-off state, the first liquid lens H1 is planar. The focal length of the optical lens 10 is the same as that of the fixed focal length assembly.

[0218] The optical design parameters of the optical lens 10 in the second embodiment of this application are shown in the table below:

[0219] Table 3 Optical design parameters of the optical lens 10 in the second embodiment

[0220]

[0221]

[0222] The meanings of each symbol in Table 3 above are as follows:

[0223] S1: First surface of the first liquid lens; S2: Second surface of the first liquid lens; S3: Third surface of the first liquid lens; S4: Fourth surface of the first liquid lens; S5: Fifth surface of the first liquid lens; S7: Object-side surface of the first lens L1; S8: Image-side surface of the first lens L1; S9: Object-side surface of the second lens L2; ​​S10: Image-side surface of the second lens L2; ​​S11: Object-side surface of the third lens L3; S12: Image-side surface of the third lens L3; S13: Object-side surface of the fourth lens L4; S14: Image-side surface of the fourth lens L4; S15: Object-side surface of the fifth lens L5;

[0224] S16: Image-side surface of the fifth lens L5; S17: Object-side surface of the sixth lens L6; S18: Image-side surface of the sixth lens L6; S19: Object-side surface of the infrared cut-off filter; S20: Image-side surface of the infrared cut-off filter.

[0225] Furthermore, as can be seen from Table 3, when the adjustable focus assembly is powered on (with voltage applied), the image-side focal length EFL1 of the optical lens 10 is 2.93, the aperture value FNO1 is 2.25, the half field of view HFOV1 is 46°, and the total optical length TTL is 6.51; when the adjustable focus assembly is powered off (without voltage applied), the image-side focal length EFL2 of the optical lens 10 is 2.71, the aperture value FNO2 is 2.29, and the half field of view HFOV2 is 53°.

[0226] Table 4-1 Aspherical coefficients of the optical lens 10 in the second embodiment

[0227]

[0228]

[0229] Table 4-2 Aspherical coefficients of the optical lens 10 in the second embodiment

[0230]

[0231]

[0232] Where K represents the conic coefficient in the aspherical curve equation, and A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 represent the 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, and 30th order aspherical coefficients of each surface. Surface numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, and 18 correspond to the lens surfaces S1, S2, S3, S4, S5, stop, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, and S18, respectively.

[0233] In this embodiment, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the second lens L2 is convex near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the third lens L3 is convex near the optical axis, and the image-side surface is concave near the optical axis; the object-side surface of the fourth lens L4 is convex near the optical axis, and the image-side surface is concave near the optical axis; the object-side surface of the fifth lens L5 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the sixth lens L6 is convex near the optical axis, and the image-side surface is concave near the optical axis.

[0234] The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a negative optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power.

[0235] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the half field of view HFOV1 = 46°, and when the adjustable focus assembly is powered off (no voltage applied), the half field of view HFOV2 = 53°, and |HFOV1-HFOV2| = 7°.

[0236] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 2.93, and when the adjustable focus assembly is powered off (voltage not applied), the focal length of the optical lens is f2 = 2.71, and f1 / f2 = 1.08.

[0237] In this embodiment of the application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the adjustable focus lens is fa = 106.02. When the adjustable focus assembly is powered off (voltage not applied), the focal length of the optical lens is f2 = 2.71, and fa / f2 = 39.12.

[0238] In this embodiment, when the adjustable focus assembly is powered on (voltage applied), the distance TTL from the object side of the first fixed-shape lens in the object-side direction to the imaging surface of the optical lens on the optical axis is 6.51. When the adjustable focus assembly is powered off (voltage not applied), the focal length f2 of the optical lens is 2.71 and TTL / f2 is 2.40.

[0239] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 2.93. When the adjustable focus assembly is in the voltage applied state, the entrance pupil diameter of the optical lens is EPD1 = 1.3, and f1 / EPD1 = 2.25.

[0240] In the embodiments of this application, when the adjustable focal length assembly is powered on (the state in which voltage is applied), the focal length of the first shape-fixed lens (i.e., the sixth lens L6) in the direction from the image side to the object side is f1 = -2.13, the focal length of the second shape-fixed lens (i.e., the fifth lens L5) in the direction from the image side to the object side is f1-1 = 1.48, and |fl / fl-1| = 1.44.

[0241] In this embodiment of the application, half the diagonal length of the effective pixel area of ​​the electronic photosensitive element on the imaging surface corresponding to the optical lens is Imgh = 3.35, the distance on the optical axis from the object side of the first shape-fixed lens (i.e., the first lens L1) to the imaging surface corresponding to the optical lens along the object side to the image side is TTL = 6.51, and Imgh / TTL = 0.51.

[0242] In this embodiment of the application, R21 / R22*CT2=-0.18, where R21 is the radius of curvature of the object side of the first fixed-shape lens (i.e., the first lens L1) in the fixed-focus assembly along the object side to the image side, R22 is the radius of curvature of the image side of the second fixed-shape lens (i.e., the second lens L2) in the fixed-focus assembly along the object side to the image side, and CT2 is the center thickness of the second fixed-shape lens (i.e., the second lens L2) in the optical axis direction in the fixed-focus assembly along the object side to the image side.

[0243] In this embodiment of the application, the distance AT12 between the first shape-fixed lens (i.e., the first lens L1) and the second shape-fixed lens (i.e., the second lens L2) along the object-side to image-side direction is 0.1. The distance ATL between the first shape-fixed lens (i.e., the sixth lens L6) and the second shape-fixed lens (i.e., the fifth lens L5) along the image-side to object-side direction in the fixed focal length assembly is 0.05. AT12 / ATL = 2.00.

[0244] In this embodiment of the application, (CT2+CT3) / CTL=1.95, where CT2 is the center thickness of the second shape-fixed lens (i.e., the second lens L2) in the fixed focal length assembly along the object side to the image side in the optical axis direction, CT3 is the center thickness of the third shape-fixed lens (i.e., the third lens L3) in the fixed focal length assembly along the object side to the image side in the optical axis direction, and CTL is the center thickness of the first shape-fixed lens (i.e., the sixth lens L6) in the fixed focal length assembly along the image side to the object side in the optical axis direction.

[0245] Figure 3C , Figure 3D , Figure 3E The optical performance of the optical lens 10 of the second embodiment is shown, wherein the left figure represents the optical performance of the optical lens 10 in the powered-on state (the state in which voltage is applied), and the right figure represents the optical performance of the optical lens 10 in the powered-off state (the state in which no voltage is applied).

[0246] Figure 3C The diagram illustrates the axial chromatic aberration of the optical lens 10 in the second embodiment, with wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm, after passing through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The vertical axis represents the normalized pupil coordinates, and the horizontal axis represents the axial chromatic aberration, in millimeters. Figure 3C A comparison of the left and right images shows that, in this embodiment, the axial chromatic aberration of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0247] Figure 3D The diagram illustrates the astigmatism of the optical lens 10 in the second embodiment when light with a wavelength of 555nm passes through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The solid line represents the meridional astigmatism of 555nm light passing through the optical lens 10, and the dashed line represents the sagittal astigmatism. The vertical axis represents the image height angle, and the horizontal axis represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, in millimeters. Figure 3D A comparison of the left and right images shows that, in this embodiment, the astigmatism of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0248] Figure 3EThe diagram illustrates the distortion of the optical lens 10 in the second embodiment when light with a wavelength of 555nm passes through it in both a powered-on state (with voltage applied) and a powered-off state (without voltage applied). The vertical axis represents image height, and the horizontal axis represents the optical distortion value corresponding to different fields of view, expressed as a percentage. Figure 3E As can be seen from the comparison between the left and right figures, in this embodiment, the distortion of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0249] Therefore, by applying voltage to the adjustable optical lens 10, the focal length of the adjustable optical lens module is changed, thereby making the combined focal length of the adjustable optical lens module and the main camera lens module match the focal length of the wide-angle lens, thus meeting the needs of using a wide-angle lens.

[0250] Example 3

[0251] Figure 4A This diagram illustrates the structure of the optical lens 10 in the powered-on state (state with applied voltage) according to Embodiment 3 of this application. The optical lens 10 includes an adjustable focal length assembly and a fixed focal length assembly. Specifically, the adjustable focal length assembly and the fixed focal length assembly are arranged sequentially from the object side to the image side. The adjustable focal length assembly includes a first liquid lens H1, and the fixed focal length assembly may include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5. Figure 4A As can be seen from the above, the first liquid lens H1 is non-planar in the powered-on state.

[0252] Figure 4B This diagram illustrates the structure of the optical lens 10 in Embodiment 3 of this application in the powered-off state (state without applied voltage). Figure 4B As shown, in the powered-off state, the first liquid lens H1 is planar. The focal length of the optical lens 10 is the same as that of the fixed focal length assembly.

[0253] The optical design parameters of the optical lens 10 in the third embodiment of this application are shown in the table below:

[0254] Table 5 Optical design parameters of the optical lens 10 in the third embodiment

[0255]

[0256]

[0257] The meanings of each symbol in Table 5 above are as follows:

[0258] S1: First surface of the first liquid lens; S2: Second surface of the first liquid lens; S3: Third surface of the first liquid lens; S4: Fourth surface of the first liquid lens; S5: Fifth surface of the first liquid lens; S6: Object-side surface of the first lens L1; S7: Image-side surface of the first lens L1; S9: Object-side surface of the second lens L2; ​​S10: Image-side surface of the second lens L2; ​​S11: Object-side surface of the third lens L3; S12: Image-side surface of the third lens L3; S13: Object-side surface of the fourth lens L4; S14: Image-side surface of the fourth lens L4; S15: Object-side surface of the fifth lens L5; S16: Image-side surface of the fifth lens L5; S17: Object-side surface of the infrared cut-off filter; S18: Image-side surface of the infrared cut-off filter.

[0259] Furthermore, as can be seen from Table 5, when the adjustable focus assembly is powered on (with voltage applied), the image-side focal length EFL1 of the optical lens 10 is 1.47, the aperture value FNO1 is 2.14, the half field of view HFOV1 is 56°, and the total optical length TTL is 3.71; when the adjustable focus assembly is powered off (without voltage applied), the image-side focal length EFL2 of the optical lens 10 is 1.4, the aperture value FNO2 is 2.14, and the half field of view HFOV2 is 65°.

[0260] Table 6-1 Aspherical coefficients of the optical lens 10 in the third embodiment

[0261]

[0262]

[0263] Table 6-2 Aspherical coefficients of the optical lens 10 in the third embodiment

[0264]

[0265]

[0266] Where K represents the conic coefficient in the aspherical curve equation, and A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 represent the 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, and 30th order aspherical coefficients of each surface. Surface numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, and 16 correspond to the lens surfaces S1, S2, S3, S4, S5, S6, S7, stop, S9, S10, S11, S12, S13, S14, S15, and S16, respectively.

[0267] In this embodiment, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is also concave near the optical axis; the object-side surface of the second lens L2 is convex near the optical axis, and the image-side surface is also convex near the optical axis; the object-side surface of the third lens L3 is concave near the optical axis, and the image-side surface is also concave near the optical axis; the object-side surface of the fourth lens L4 is convex near the optical axis, and the image-side surface is also convex near the optical axis; the object-side surface of the fifth lens L5 is convex near the optical axis, and the image-side surface is concave near the optical axis.

[0268] The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, and the fifth lens L5 has a negative optical power.

[0269] In the embodiments of this application, when the adjustable focus assembly is powered on (with voltage applied), the half field of view HFOV1 = 56°, and when the adjustable focus assembly is powered off (without voltage applied), the half field of view HFOV2 = 65°, and |HFOV1-HFOV2| = 9°.

[0270] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 1.47, and when the adjustable focus assembly is powered off (voltage not applied), the focal length of the optical lens is f2 = 1.4, and f1 / f2 = 1.05.

[0271] In this embodiment of the application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the adjustable focus lens is fa = 3048.45. When the adjustable focus assembly is powered off (voltage not applied), the focal length of the optical lens is f2 = 1.4, and fa / f2 = 2177.46.

[0272] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the distance TTL from the object side of the first shape-fixed lens in the object-side direction to the imaging surface of the optical lens on the optical axis is 3.17. When the adjustable focus assembly is powered off (voltage not applied), the focal length f2 of the optical lens is 1.4 and TTL / f2 is 2.65.

[0273] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 1.47. When the adjustable focus assembly is in the voltage applied state, the entrance pupil diameter of the optical lens is EPD1 = 0.69, and f1 / EPD1 = 2.14.

[0274] In the embodiments of this application, when the adjustable focal length assembly is powered on (the state in which voltage is applied), the focal length of the first shape-fixed lens (i.e., the fifth lens L5) in the direction from the image side to the object side is f1 = -3.86, the focal length of the second shape-fixed lens (i.e., the fourth lens L4) in the direction from the image side to the object side is f1-1 = 1.6, and |fl / fl-1| = 2.41.

[0275] In this embodiment of the application, half the diagonal length of the effective pixel area of ​​the electronic photosensitive element on the imaging surface corresponding to the optical lens is Imgh = 1.8, the distance on the optical axis from the object side of the first shape-fixed lens (i.e., the first lens L1) to the imaging surface corresponding to the optical lens is TTL = 3.71, and Imgh / TTL = 0.49.

[0276] In this embodiment of the application, R21 / R22*CT2=-0.41, where R21 is the radius of curvature of the object side of the first fixed-shape lens (i.e., the first lens L1) in the fixed-focus assembly along the object side to the image side, R22 is the radius of curvature of the image side of the second fixed-shape lens (i.e., the second lens L2) in the fixed-focus assembly along the object side to the image side, and CT2 is the center thickness of the second fixed-shape lens (i.e., the second lens L2) in the optical axis direction in the fixed-focus assembly along the object side to the image side.

[0277] In this embodiment of the application, the distance AT12 between the first shape-fixed lens (i.e., the first lens L1) and the second shape-fixed lens (i.e., the second lens L2) along the object-side to image-side direction is 0.18. The distance ATL between the first shape-fixed lens (i.e., the fifth lens L5) and the second shape-fixed lens (i.e., the fourth lens L4) along the image-side to object-side direction in the fixed focal length assembly is 0.16. AT12 / ATL = 1.13.

[0278] In this embodiment of the application, (CT2+CT3) / CTL=1.67, where CT2 is the center thickness of the second shape fixed lens (i.e., the second lens L2) in the fixed focal length assembly along the object side to the image side in the optical axis direction, CT3 is the center thickness of the third shape fixed lens (i.e., the third lens L3) in the fixed focal length assembly along the object side to the image side in the optical axis direction, and CTL is the center thickness of the first shape fixed lens (i.e., the fifth lens L5) in the fixed focal length assembly along the image side to the object side in the optical axis direction.

[0279] Figure 4C , Figure 4D , Figure 4EThe optical performance of the optical lens 10 of the third embodiment is shown, wherein the left figure represents the optical performance of the optical lens 10 in the powered-on state (the state in which voltage is applied), and the right figure represents the optical performance of the optical lens 10 in the powered-off state (the state in which no voltage is applied).

[0280] Figure 4C The diagram illustrates the axial chromatic aberration of the optical lens 10 in the third embodiment, with wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm, after passing through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The vertical axis represents the normalized pupil coordinates, and the horizontal axis represents the axial chromatic aberration, in millimeters. Figure 4C A comparison of the left and right images shows that, in this embodiment, the axial chromatic aberration of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0281] Figure 4D The diagram illustrates the astigmatism of the optical lens 10 in the third embodiment when light with a wavelength of 555nm passes through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The solid line represents the meridional astigmatism of 555nm light passing through the optical lens 10, and the dashed line represents the sagittal astigmatism. The vertical axis represents the image height, and the horizontal axis represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, in millimeters. Figure 4D A comparison of the left and right images shows that, in this embodiment, the astigmatism of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0282] Figure 4E The diagram illustrates the distortion of the optical lens 10 in the third embodiment when light with a wavelength of 555nm passes through it in both a powered-on state (with voltage applied) and a powered-off state (without voltage applied). The vertical axis represents image height, and the horizontal axis represents the optical distortion value corresponding to different fields of view, expressed as a percentage. Figure 4E As can be seen from the comparison between the left and right figures, in this embodiment, the distortion of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0283] Therefore, by applying voltage to the adjustable optical lens 10, the focal length of the adjustable optical lens module is changed, thereby making the combined focal length of the adjustable optical lens module and the main camera lens module match the focal length of the wide-angle lens, thus meeting the needs of using a wide-angle lens.

[0284] Example 4

[0285] Figure 5A This diagram illustrates the structure of the optical lens 10 in the powered-on state (state with applied voltage) according to Embodiment 4 of this application. The optical lens 10 includes an adjustable focal length assembly and a fixed focal length assembly. Specifically, the adjustable focal length assembly and the fixed focal length assembly are arranged sequentially from the object side to the image side. The adjustable focal length assembly includes a first liquid lens H1, and the fixed focal length assembly may include a first lens L1, a second lens L2, a third lens, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. Figure 5A As can be seen from the above, the first liquid lens H1 is non-planar in the powered-on state.

[0286] Figure 5B A schematic diagram of the optical lens 10 in Embodiment 4 of this application in the power-off state (state without applied voltage) is shown. Figure 5B As shown, in the powered-off state, the first liquid lens H1 is planar. The focal length of the optical lens 10 is the same as that of the fixed focal length assembly.

[0287] The optical design parameters of the optical lens 10 in the fourth embodiment of this application are shown in the table below:

[0288] Table 7 Optical design parameters of the optical lens 10 in the fourth embodiment

[0289]

[0290]

[0291] The meanings of the symbols in Table 7 above are as follows:

[0292] S1: First surface of the first liquid lens; S2: Second surface of the first liquid lens; S3: Third surface of the first liquid lens; S4: Fourth surface of the first liquid lens; S5: Fifth surface of the first liquid lens; S6: Object-side surface of the first lens L1; S7: Image-side surface of the first lens L1; S8: Object-side surface of the second lens L2; ​​S9: Image-side surface of the second lens L2; ​​S11: Object-side surface of the third lens L3; S12: Image-side surface of the third lens L3 Surface; S13: Object-side surface of the fourth lens L4; S14: Image-side surface of the fourth lens L4; S15: Object-side surface of the fifth lens L5; S16: Image-side surface of the fifth lens L5; S17: Object-side surface of the sixth lens L6; S18: Image-side surface of the sixth lens L6; S19: Object-side surface of the seventh lens L7; S20: Image-side surface of the seventh lens L7; S21: Object-side surface of the infrared cut-off filter; S22: Image-side surface of the infrared cut-off filter.

[0293] Furthermore, as can be seen from Table 5, when the adjustable focus assembly is powered on (with voltage applied), the image-side focal length EFL1 of the optical lens 10 is 4.36, the aperture value FNO1 is 1.85, the half field of view HFOV1 is 44°, and the total optical length TTL is 7.48; when the adjustable focus assembly is powered off (without voltage applied), the image-side focal length EFL2 of the optical lens 10 is 4.19, the aperture value FNO2 is 1.86, and the half field of view HFOV2 is 51°.

[0294] Table 8-1 Aspherical coefficient of optical lens 10 in the fourth embodiment

[0295]

[0296]

[0297] Table 8-2 Aspherical coefficients of the optical lens 10 in the fourth embodiment

[0298]

[0299]

[0300] Where K represents the conic coefficient in the aspherical curve equation, and A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 represent the 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, and 30th order aspherical coefficients of each surface. Surface numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20 correspond to the lens surfaces S1, S2, S3, S4, S5, S6, S7, S8, S9, aperture, S11, S12, S13, S14, S15, S16, S17, S18, S19, and S20, respectively.

[0301] In this embodiment, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the second lens L2 is convex near the optical axis, and the image-side surface is concave near the optical axis; the object-side surface of the third lens L3 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the fourth lens L4 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the fifth lens L5 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the sixth lens L6 is convex near the optical axis, and the image-side surface is concave near the optical axis; and the object-side surface of the seventh lens L7 is convex near the optical axis, and the image-side surface is concave near the optical axis.

[0302] The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a positive optical power, the fourth lens L4 has a negative optical power, the fifth lens L5 has a negative optical power, the sixth lens L6 has a positive optical power, and the seventh lens L7 has a negative optical power.

[0303] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the half field of view HFOV1 = 44°, and when the adjustable focus assembly is powered off (no voltage applied), the half field of view HFOV2 = 51°, and |HFOV1-HFOV2| = 7°.

[0304] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 4.36, and when the adjustable focus assembly is powered off (voltage not applied), the focal length of the optical lens is f2 = 4.19, and f1 / f2 = 1.05.

[0305] In this embodiment, when the adjustable focus assembly is powered on (voltage applied), the focal length of the adjustable focus lens is fa = 1985.8. When the adjustable focus assembly is powered off (voltage not applied), the focal length of the optical lens is f2 = 4.19, and fa / f2 = 473.94.

[0306] In this embodiment, when the adjustable focus assembly is powered on (voltage applied), the distance TTL from the object side of the first fixed-shape lens (i.e., the first lens L1) to the imaging surface corresponding to the optical lens along the object side to the image side direction is 7.48. When the adjustable focus assembly is powered off (voltage not applied), the focal length f2 of the optical lens is 4.19, and TTL / f2 is 1.79.

[0307] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 4.36. When the adjustable focus assembly is in the voltage applied state, the entrance pupil diameter of the optical lens is EPD1 = 2.36, and f1 / EPD1 = 1.85.

[0308] In the embodiments of this application, when the adjustable focal length assembly is powered on (the state in which voltage is applied), the focal length of the first shape-fixed lens in the direction from the image side to the object side is f1 = -15, the focal length of the second shape-fixed lens (i.e., the sixth lens L6) in the direction from the image side to the object side is f1-1 = 5.25, and |f1 / f1-1| = 2.86.

[0309] In this embodiment of the application, half the diagonal length of the effective pixel area of ​​the electronic photosensitive element on the imaging surface corresponding to the optical lens is Imgh = 1 = 4.8, the distance on the optical axis from the object side of the first shape-fixed lens (i.e., the first lens L1) to the imaging surface corresponding to the optical lens is TTL = 7.48, and Imgh / TTL = 0.64.

[0310] In this embodiment of the application, R21 / R22*CT2=-1.09, where R21 is the radius of curvature of the object side of the first fixed-shape lens (i.e., the first lens L1) in the fixed-focus assembly along the object side to the image side, R22 is the radius of curvature of the image side of the second fixed-shape lens (i.e., the second lens L2) in the fixed-focus assembly along the object side to the image side, and CT2 is the center thickness of the second fixed-shape lens (i.e., the second lens L2) in the optical axis direction in the fixed-focus assembly along the object side to the image side.

[0311] In the embodiments of this application, the distance AT12 between the first shape-fixed lens (i.e., the first lens L1) and the second shape-fixed lens (i.e., the second lens L2) along the object-side to image-side direction is 0.05. The distance ATL between the first shape-fixed lens (i.e., the seventh lens L7) and the second shape-fixed lens (i.e., the sixth lens L6) along the image-side to object-side direction in the fixed focal length assembly is 0.5. AT12 / ATL = 0.10.

[0312] In this embodiment of the application, (CT2+CT3) / CTL=2.03, where CT2 is the center thickness of the second shape-fixed lens (i.e., the second lens L2) in the fixed focal length assembly along the object side to the image side in the optical axis direction, CT3 is the center thickness of the third shape-fixed lens (i.e., the third lens L3) in the fixed focal length assembly along the object side to the image side in the optical axis direction, and CTL is the center thickness of the first shape-fixed lens (i.e., the seventh lens L7) in the fixed focal length assembly along the image side to the object side in the optical axis direction.

[0313] Figure 5C , Figure 5D , Figure 5E The optical performance of the optical lens 10 according to the fourth embodiment is shown, wherein the left figure represents the optical performance of the optical lens 10 in the powered-on state (the state in which voltage is applied), and the right figure represents the optical performance of the optical lens 10 in the powered-off state (the state in which no voltage is applied).

[0314] Figure 5CThe diagram illustrates the axial chromatic aberration of the optical lens 10 in the fourth embodiment when light with wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm passes through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The vertical axis represents the normalized pupil coordinates, and the horizontal axis represents the axial chromatic aberration, in millimeters. Figure 5C A comparison of the left and right images shows that, in this embodiment, the axial chromatic aberration of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0315] Figure 5D The diagram illustrates the astigmatism of the optical lens 10 in the fourth embodiment when light with a wavelength of 555nm passes through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The solid line represents the meridional astigmatism of 555nm light passing through the optical lens 10, and the dashed line represents the sagittal astigmatism. The vertical axis represents the image height, and the horizontal axis represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, in millimeters. Figure 5D A comparison of the left and right images shows that, in this embodiment, the astigmatism of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0316] Figure 5E The diagram illustrates the distortion of the optical lens 10 in the fourth embodiment when light with a wavelength of 555nm passes through it in both a powered-on state (with voltage applied) and a powered-off state (without voltage applied). The vertical axis represents image height, and the horizontal axis represents the optical distortion value corresponding to different fields of view, expressed as a percentage. Figure 5E As can be seen from the comparison between the left and right figures, in this embodiment, the distortion of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0317] Therefore, by applying voltage to the adjustable optical lens 10, the focal length of the adjustable optical lens module is changed, thereby making the combined focal length of the adjustable optical lens module and the main camera lens module match the focal length of the wide-angle lens, thus meeting the needs of using a wide-angle lens.

[0318] Example 5

[0319] Figure 6AThis diagram illustrates the structure of the optical lens 10 in the powered-on state (state with applied voltage) according to Embodiment 5 of this application. The optical lens 10 includes an adjustable focal length assembly and a fixed focal length assembly. Specifically, the adjustable focal length assembly and the fixed focal length assembly are arranged sequentially from the object side to the image side. The adjustable focal length assembly includes a first liquid lens H1 and a second liquid lens H2, and the fixed focal length assembly may include a first lens L1, a second lens L2, a third lens, a fourth lens L4, a fifth lens L5, and a sixth lens L6. Figure 6A As can be seen, when powered on, both the first liquid lens H1 and the second liquid lens H2 are non-planar in shape.

[0320] Figure 6B This diagram illustrates the structure of the optical lens 10 in Embodiment 5 of this application in the powered-off state (state without applied voltage). Figure 6B As shown, in the powered-off state, both the first liquid lens H1 and the second liquid lens H2 are planar. The focal length of the optical lens 10 is the same as that of the fixed focal length assembly.

[0321] The optical design parameters of the optical lens 10 in the fifth embodiment of this application are shown in the table below:

[0322] Table 9 Optical design parameters of the optical lens 10 in the fifth embodiment

[0323]

[0324] The meanings of the symbols in Table 9 above are as follows:

[0325] S1: First surface of the first liquid lens; S2: Second surface of the first liquid lens; S3: Air gap between the first liquid lens H1 and the second liquid lens H2; S4: First surface of the second liquid lens; S5: Second surface of the second liquid lens; S6: Third surface of the second liquid lens; S7: Fourth surface of the second liquid lens; S9: Object-side surface of the first lens L1; S10: Image-side surface of the first lens L1; S11: Object-side surface of the second lens L2; ​​S12: Image-side surface of the second lens L2; ​​S13: Object-side surface of the third lens L3; S14: Image-side surface of the third lens L3; S15: Object-side surface of the fourth lens L4; S16: Image-side surface of the fourth lens L4; S17: Object-side surface of the fifth lens L5;

[0326] S18: Image-side surface of the fifth lens L5; S19: Object-side surface of the sixth lens L6; S20: Image-side surface of the sixth lens L6; S21: Object-side surface of the infrared cut-off filter; S22: Image-side surface of the infrared cut-off filter.

[0327] Furthermore, as shown in Table 9, when the adjustable focus assembly is powered on (with voltage applied), the image-side focal length EFL1 of the optical lens 10 is 2.44, the aperture value FNO1 is 2.18, the half field of view HFOV1 is 45°, and the total optical length TTL is 4.87. When the adjustable focus assembly is powered off (without voltage applied), the image-side focal length EFL2 of the optical lens 10 is 2.20, the aperture value FNO2 is 2.19, and the half field of view HFOV2 is 52°.

[0328] Table 10-1 Aspherical coefficients of the optical lens 10 in the fifth embodiment

[0329]

[0330]

[0331] Table 10-2 Aspherical coefficients of the optical lens 10 in the fifth embodiment

[0332]

[0333]

[0334] Where K represents the conic coefficient in the aspherical curve equation, and A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 represent the 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, and 30th order aspherical coefficients of each surface. Surface numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20 correspond to the lens surfaces S1, S2, S3, S4, S5, S6, S7, stop, S9, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, and S20, respectively.

[0335] In this embodiment, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the second lens L2 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the third lens L3 is convex near the optical axis, and the image-side surface is concave near the optical axis; the object-side surface of the fourth lens L4 is concave near the optical axis, and the image-side surface is concave near the optical axis; the object-side surface of the fifth lens L5 is concave near the optical axis, and the image-side surface is convex near the optical axis; and the object-side surface of the sixth lens L6 is concave near the optical axis, and the image-side surface is convex near the optical axis.

[0336] The first lens L1 has a positive optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a negative optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power.

[0337] In the embodiments of this application, when the adjustable focus assembly is powered on (with voltage applied), the half field of view HFOV1 = 45°, and when the adjustable focus assembly is powered off (without voltage applied), the half field of view HFOV2 = 52°, and |HFOV1-HFOV2| = 7°.

[0338] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 2.44, and when the adjustable focus assembly is powered off (voltage not applied), the focal length of the optical lens is f2 = 2.2, and f1 / f2 = 1.11.

[0339] In this embodiment, when the adjustable focus assembly is powered on (voltage applied), the focal length of the adjustable focus lens is fa = 62.42. When the adjustable focus assembly is powered off (voltage not applied), the focal length of the optical lens is f2 = 2.2, and fa / f2 = 28.37.

[0340] In this embodiment, when the adjustable focus assembly is powered on (voltage applied), the distance TTL from the object side of the first fixed-shape lens (i.e., the first lens L1) to the imaging surface corresponding to the optical lens along the object side to the image side direction is 4.87. When the adjustable focus assembly is powered off (voltage not applied), the focal length f2 of the optical lens is 2.2, and TTL / f2 is 2.21.

[0341] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 2.44. When the adjustable focus assembly is in the voltage applied state, the entrance pupil diameter of the optical lens is EPD1 = 1.12, and f1 / EPD1 = 2.18.

[0342] In the embodiments of this application, when the adjustable focal length assembly is powered on (the state in which voltage is applied), the focal length of the first shape-fixed lens (i.e., the sixth lens L6) in the direction from the image side to the object side is f1 = -4.17, the focal length of the second shape-fixed lens (i.e., the fifth lens L5) in the direction from the image side to the object side is f1-1 = 1.37, and |fl / fl-1| = 3.04.

[0343] In this embodiment of the application, half the diagonal length of the effective pixel area of ​​the electronic photosensitive element on the imaging surface corresponding to the optical lens is Imgh = 1 = 3.32, the distance on the optical axis from the object side of the first shape-fixed lens (i.e., the first lens L1) to the imaging surface corresponding to the optical lens along the object side to the image side is TTL = 4.87, and Imgh / TTL = 0.68.

[0344] In this embodiment of the application, R21 / R22*CT2=0.10, where R21 is the radius of curvature of the object side of the first fixed-shape lens (i.e., the first lens L1) in the fixed-focus assembly along the object side to the image side, R22 is the radius of curvature of the image side of the second fixed-shape lens (i.e., the second lens L2) in the fixed-focus assembly along the object side to the image side, and CT2 is the center thickness of the second fixed-shape lens (i.e., the second lens L2) in the optical axis direction in the fixed-focus assembly along the object side to the image side.

[0345] In this embodiment of the application, the distance AT12 between the first shape-fixed lens (i.e., the first lens L1) and the second shape-fixed lens (i.e., the second lens L2) along the object-side to image-side direction is 0.08. The distance ATL between the first shape-fixed lens (i.e., the sixth lens L6) and the second shape-fixed lens (i.e., the fifth lens L5) along the image-side to object-side direction in the fixed focal length assembly is 0.07. AT12 / ATL = 1.14.

[0346] In the embodiments of this application, (CT2+CT3) / CTL=2.21, where CT2 is the center thickness of the second shape-fixed lens (i.e., the second lens L2) in the fixed focal length assembly along the object side to the image side in the optical axis direction, CT3 is the center thickness of the third shape-fixed lens (i.e., the third lens L3) in the fixed focal length assembly along the object side to the image side in the optical axis direction, and CTL is the center thickness of the first shape-fixed lens (i.e., the sixth lens L6) in the fixed focal length assembly along the image side to the object side in the optical axis direction.

[0347] Figure 6C , Figure 6D , Figure 6E The optical performance of the optical lens 10 according to the fifth embodiment is shown, wherein the left figure represents the optical performance of the optical lens 10 in the powered-on state (the state in which voltage is applied), and the right figure represents the optical performance of the optical lens 10 in the powered-off state (the state in which no voltage is applied).

[0348] Figure 6CThe diagram illustrates the axial chromatic aberration of the optical lens 10 in the fifth embodiment when light with wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm passes through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The vertical axis represents the normalized pupil coordinates, and the horizontal axis represents the axial chromatic aberration, in millimeters. Figure 5C A comparison of the left and right images shows that, in this embodiment, the axial chromatic aberration of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0349] Figure 6D The diagram illustrates the astigmatism of the optical lens 10 in the fifth embodiment when light with a wavelength of 555nm passes through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The solid line represents the meridional astigmatism of 555nm light passing through the optical lens 10, and the dashed line represents the sagittal astigmatism. The vertical axis represents the image height, and the horizontal axis represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, in millimeters. Figure 5D A comparison of the left and right images shows that, in this embodiment, the astigmatism of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0350] Figure 6E The distortion of the optical lens 10 in the fifth embodiment is shown when light with a wavelength of 555nm passes through it in a powered-on state (with voltage applied) and a powered-off state (without voltage applied). The vertical axis represents image height, and the horizontal axis represents the optical distortion value corresponding to different fields of view, in percentage form. Figure 5E As can be seen from the comparison between the left and right figures, in this embodiment, the distortion of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0351] Therefore, by applying voltage to the adjustable optical lens 10, the focal length of the adjustable optical lens module is changed, thereby making the combined focal length of the adjustable optical lens module and the main camera lens module match the focal length of the wide-angle lens, thus meeting the needs of using a wide-angle lens.

[0352] Example 6

[0353] Figure 7AThis diagram illustrates the structure of the optical lens 10 in the powered-on state (state with applied voltage) according to Embodiment 6 of this application. The optical lens 10 includes an adjustable focal length assembly and a fixed focal length assembly. Specifically, the adjustable focal length assembly and the fixed focal length assembly are arranged sequentially from the object side to the image side. The adjustable focal length assembly includes a first liquid lens H1 and a second liquid lens H2, and the fixed focal length assembly may include a first lens L1, a second lens L2, a third lens, a fourth lens L4, a fifth lens L5, and a sixth lens L6. Figure 6A As can be seen, when powered on, both the first liquid lens H1 and the second liquid lens H2 are non-planar in shape.

[0354] Figure 7B A schematic diagram of the optical lens 10 in Embodiment 6 of this application in the power-off state (state without applied voltage) is shown. Figure 7B As shown, in the powered-off state, both the first liquid lens H1 and the second liquid lens H2 are planar. The focal length of the optical lens 10 is the same as that of the fixed focal length assembly.

[0355] The optical design parameters of the optical lens 10 in the sixth embodiment of this application are shown in the table below:

[0356] Table 11 Optical design parameters of the optical lens 10 in the sixth embodiment

[0357]

[0358]

[0359] The meanings of the symbols in Table 11 above are as follows:

[0360] S1: First surface of the first liquid lens; S2: Second surface of the first liquid lens; S3: Air gap between the first liquid lens H1 and the second liquid lens H2; S4: First surface of the second liquid lens; S5: Second surface of the second liquid lens; S6: Third surface of the second liquid lens; S7: Fourth surface of the second liquid lens; S9: Object-side surface of the first lens L1; S10: Image-side surface of the first lens L1; S11: Object-side surface of the second lens L2; S12: Image-side surface of the second lens L2; ​​S13: Object-side surface of the third lens L3; S14: Image-side surface of the third lens L3; S15: Object-side surface of the fourth lens L4; S16: Image-side surface of the fourth lens L4; S17: Object-side surface of the fifth lens L5; S18: Image-side surface of the fifth lens L5; S19: Object-side surface of the sixth lens L6; S20: Image-side surface of the sixth lens L6; S21: Object-side surface of the infrared cut-off filter; S22: Image-side surface of the infrared cut-off filter.

[0361] Furthermore, as shown in Table 11, when the adjustable focus assembly is powered on (with voltage applied), the image-side focal length EFL1 of the optical lens 10 is 2.58, the aperture value FNO1 is 2.29, the half field of view HFOV1 is 45°, and the total optical length TTL is 4.92. When the adjustable focus assembly is powered off (without voltage applied), the image-side focal length EFL2 of the optical lens 10 is 2.40, the aperture value FNO2 is 2.32, and the half field of view HFOV2 is 52°.

[0362] Table 12-1 Aspherical coefficients of the optical lens 10 in the sixth embodiment

[0363]

[0364]

[0365] Table 12-2 Aspherical coefficients of the optical lens 10 in the sixth embodiment

[0366]

[0367]

[0368] Where K represents the conic coefficient in the aspherical curve equation, and A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 represent the 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, and 30th order aspherical coefficients of each surface. Surface numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20 correspond to the lens surfaces S1, S2, S3, S4, S5, S6, S7, stop, S9, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, and S20, respectively.

[0369] In this embodiment, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the second lens L2 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the third lens L3 is convex near the optical axis, and the image-side surface is concave near the optical axis; the object-side surface of the fourth lens L4 is concave near the optical axis, and the image-side surface is convex near the optical axis; the object-side surface of the fifth lens L5 is concave near the optical axis, and the image-side surface is convex near the optical axis; and the object-side surface of the sixth lens L6 is concave near the optical axis, and the image-side surface is convex near the optical axis.

[0370] The first lens L1 has a positive optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a negative optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power.

[0371] In the embodiments of this application, when the adjustable focus assembly is powered on (with voltage applied), the half field of view HFOV1 = 45°, and when the adjustable focus assembly is powered off (without voltage applied), the half field of view HFOV2 = 52°, and |HFOV1-HFOV2| = 7°.

[0372] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 2.58, and when the adjustable focus assembly is powered off (voltage not applied), the focal length of the optical lens is f2 = 2.24f1 / f2 = 1.08.

[0373] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the adjustable focus lens is fa = 73.47. When the adjustable focus assembly is powered off (voltage not applied), the focal length of the optical lens is f2 = 2.4, and fa / f2 = 30.61.

[0374] In this embodiment, when the adjustable focus assembly is powered on (voltage applied), the distance TTL from the object side of the first shape-fixed lens (i.e., the first lens L1) to the imaging surface corresponding to the optical lens along the object side to the image side direction is 4.92. When the adjustable focus assembly is powered off (voltage not applied), the focal length f2 of the optical lens is 2.4, and TTL / f2 is 2.05.

[0375] In the embodiments of this application, when the adjustable focus assembly is powered on (voltage applied), the focal length of the optical lens is f1 = 2.58. When the adjustable focus assembly is in the voltage applied state, the entrance pupil diameter of the optical lens is EPD1 = 1.13, and f1 / EPD1 = 2.29.

[0376] In the embodiments of this application, when the adjustable focal length assembly is powered on (the state in which voltage is applied), the focal length of the first shape-fixed lens (i.e., the sixth lens L6) in the direction from the image side to the object side is f1 = -2.03, the focal length of the second shape-fixed lens (i.e., the fifth lens L5) in the direction from the image side to the object side is f1-1 = 1.27, and |fl / fl-1| = 1.60.

[0377] In this embodiment of the application, half the diagonal length of the effective pixel area of ​​the electronic photosensitive element on the imaging surface corresponding to the optical lens is Imgh = 1 = 3.32, the distance on the optical axis from the object side of the first shape-fixed lens (i.e., the first lens L1) to the imaging surface corresponding to the optical lens along the object side to the image side is TTL = 4.92, and Imgh / TTL = 0.67.

[0378] In this embodiment of the application, R21 / R22*CT2=0.00, where R21 is the radius of curvature of the object side of the first fixed-shape lens (i.e., the first lens L1) in the fixed-focus assembly along the object side to the image side, R22 is the radius of curvature of the image side of the second fixed-shape lens (i.e., the second lens L2) in the fixed-focus assembly along the object side to the image side, and CT2 is the center thickness of the second fixed-shape lens (i.e., the second lens L2) in the optical axis direction in the fixed-focus assembly along the object side to the image side.

[0379] In this embodiment of the application, the distance AT12 between the first shape-fixed lens (i.e., the first lens L1) and the second shape-fixed lens (i.e., the second lens L2) along the object-side to image-side direction is 0.06. The distance ATL between the first shape-fixed lens (i.e., the sixth lens L6) and the second shape-fixed lens (i.e., the fifth lens L5) along the image-side to object-side direction in the fixed focal length assembly is 0.05. AT12 / ATL = 1.20.

[0380] In this embodiment of the application, (CT2+CT3) / CTL=2.43, where CT2 is the center thickness of the second shape-fixed lens (i.e., the second lens L2) in the fixed focal length assembly along the object side to the image side in the optical axis direction, CT3 is the center thickness of the third shape-fixed lens (i.e., the third lens L3) in the fixed focal length assembly along the object side to the image side in the optical axis direction, and CTL is the center thickness of the first shape-fixed lens (i.e., the sixth lens L6) in the fixed focal length assembly along the image side to the object side in the optical axis direction.

[0381] Figure 7C , Figure 7D , Figure 7E The optical performance of the optical lens 10 according to the sixth embodiment is shown, wherein the left figure represents the optical performance of the optical lens 10 in the powered-on state (the state in which voltage is applied), and the right figure represents the optical performance of the optical lens 10 in the powered-off state (the state in which no voltage is applied).

[0382] Figure 7CThe diagram in the sixth embodiment illustrates the axial chromatic aberration of the optical lens 10 after light with wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm passes through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The vertical axis represents the normalized pupil coordinates, and the horizontal axis represents the axial chromatic aberration, in millimeters. Figure 7C A comparison of the left and right images shows that, in this embodiment, the axial chromatic aberration of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0383] Figure 7D The diagram in the sixth embodiment illustrates the astigmatism of the optical lens 10 when light with a wavelength of 555nm passes through it in both a powered-on state (with applied voltage) and a powered-off state (without applied voltage). The solid line represents the meridional astigmatism of 555nm light passing through the optical lens 10, and the dashed line represents the sagittal astigmatism. The vertical axis represents the image height, and the horizontal axis represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, in millimeters. Figure 7D A comparison of the left and right images shows that, in this embodiment, the astigmatism of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0384] Figure 7E The distortion of the optical lens 10 in the sixth embodiment is shown when light with a wavelength of 555nm passes through it in a powered-on state (with voltage applied) and a powered-off state (without voltage applied). The vertical axis represents image height, and the horizontal axis represents the optical distortion value corresponding to different fields of view, in percentage form. Figure 7E As can be seen from the comparison between the left and right figures, in this embodiment, the distortion of the optical lens 10 is controlled within a very small range in both the powered-on state (the state with applied voltage) and the powered-off state (the state without applied voltage).

[0385] Therefore, by applying voltage to the adjustable optical lens 10, the focal length of the adjustable optical lens module is changed, thereby making the combined focal length of the adjustable optical lens module and the main camera lens module match the focal length of the wide-angle lens, thus meeting the needs of using a wide-angle lens.

[0386] The parameters in Embodiments 1-6 of this application are summarized below.

[0387] The parameters of the optical lens 10 in Embodiments 1-6 above are shown in Tables 13-1 and 13-2.

[0388] Table 13-1 Key performance indicators for optical lenses

[0389]

[0390]

[0391] Table 13-2 Key performance indicators of optical lenses

[0392]

[0393] The meanings of HFOV1, etc. in Tables 13-1 and 13-2 are the same as those mentioned above, and the parameters in Tables 13-1 and 13-2 have been described in Examples 1-6, and will not be repeated here.

[0394] In summary, the optical lens provided in this application can achieve multiple shooting needs with only one set of lenses. Compared with some solutions that require multiple sets of lenses, it can effectively reduce the area occupied by electronic devices.

[0395] Accordingly, this application also provides an electronic device, including a housing, a processor, and the aforementioned camera module. The camera module is disposed on the front and / or back of the housing, and is used to transmit image data to the processor, which is used to process the image data.

[0396] In some embodiments, the housing of the electronic device is provided with a protective lens for protecting the optical lens. The protective lens is the first lens in the optical lens in the direction from the object side to the image side. It can be understood that using the first lens in the adjustable focus assembly as a protective lens can save the cost of the electronic device.

[0397] In the accompanying drawings, some structural or methodological features may be shown in a specific arrangement and / or order. However, it should be understood that such a specific arrangement and / or order is not necessary. Rather, in some embodiments, these features may be illustrated in a manner and / or order different from that shown in the illustrative drawings. Furthermore, the inclusion of structural or methodological features in a particular drawing does not mean that all embodiments need to include such features; in some embodiments, these features may be omitted, or they may be combined with other features.

[0398] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, the use of the technical solutions of this application is not limited to the various applications mentioned in the embodiments of this patent. Various structures and modifications can be easily implemented with reference to the technical solutions of this application to achieve the various beneficial effects mentioned herein. Within the scope of knowledge possessed by those skilled in the art, all changes made without departing from the spirit of this application should be considered within the scope of this patent application.

Claims

1. An optical lens, characterized in that, include: An adjustable focal length assembly and a fixed focal length assembly are arranged along a first direction, the first direction being the direction from the object side to the image side; The adjustable focal length assembly includes at least one adjustable focal length lens, which is a liquid lens. The fixed focal length assembly includes at least four solid lenses with fixed shapes. Among the at least four solid lenses with fixed shapes, the first lens in the direction from the image side to the object side has negative optical power, the second lens has positive optical power, and the third lens has negative optical power. In the first shape, the optical lens composed of the at least one adjustable focal length lens and the fixed focal length lens assembly has a first focal length, which corresponds to the focal length of a first type of lens. In the second shape, the optical lens composed of the at least one adjustable focal length lens assembly and the fixed focal length lens assembly has a second focal length, which corresponds to the focal length of the second type of lens. The first type of lens includes a main camera lens, and the second type of lens includes a wide-angle lens; The focal length of the fixed focal length assembly is either the focal length of the first type of lens or the focal length of the second type of lens.

2. The optical lens according to claim 1, characterized in that, The focal length of the adjustable focal length lens changes based on the applied voltage, and the focal length of the fixed focal length assembly is the focal length of the first type of lens. When the at least one adjustable focal length lens is in a state without applied voltage, the at least one adjustable focal length lens has a first shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a first focal length, wherein the first shape is a planar shape; When the at least one adjustable focal length lens is in a first voltage state, the at least one adjustable focal length lens has a second shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a second focal length, wherein the second shape is a non-planar shape.

3. The optical lens according to claim 1, characterized in that, The shape of the liquid lens changes based on the applied voltage, and the focal length of the fixed focal length assembly is the focal length of the second type of lens; When the at least one adjustable focal length lens is in a second voltage applied state, the at least one adjustable focal length lens has a first shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a first focal length, wherein the first shape is a non-planar shape. When the at least one adjustable focal length lens is in a state where no voltage is applied, the at least one adjustable focal length lens has a second shape, and the optical lens composed of the adjustable focal length assembly and the fixed focal length assembly has a second focal length, the second shape being a planar shape.

4. The optical lens according to any one of claims 1-3, characterized in that, The half-field angle of the optical lens satisfies the following formula: |HFOV1-HFOV2|>7; Wherein, HFOV1 is the half field of view of the optical lens when the adjustable focal length assembly is in a voltage-applied state; HFOV2 is the half field of view of the optical lens when the adjustable focal length assembly is in a voltage-free state.

5. The optical lens according to any one of claims 1-3, characterized in that, The focal length of the optical lens satisfies the following formula: f1 / f2 > 1.05; Wherein, f1 is the focal length of the optical lens when the adjustable focal length component is in the applied voltage state; f2 is the focal length of the optical lens when the adjustable focal length component is in the unapplied voltage state.

6. The optical lens according to any one of claims 1-3, characterized in that, The focal length of the optical lens satisfies the following formula: fa / f2>28; Wherein, fa is the focal length of the adjustable focal length lens when the adjustable focal length assembly is in the applied voltage state; f2 is the focal length of the optical lens when the adjustable focal length assembly is in the unapplied voltage state.

7. The optical lens according to any one of claims 1-3, characterized in that, The optical lens satisfies the following formula: 1.4 <TTL / f2<2.7; Wherein, TTL is the distance on the optical axis from the object side to the imaging plane of the optical lens corresponding to the first fixed-shape lens in the fixed-focus assembly along the object side to the image side, and f2 is the focal length of the optical lens when the adjustable-focus assembly is in a state where no voltage is applied; wherein, the first fixed-shape lens is the first fixed-shape lens in the optical lens along the object side to the image side.

8. The optical lens according to any one of claims 1-3, characterized in that, The optical lens satisfies the following formula: 1.0 <f1 / EPD1<2.5; Wherein, f1 is the focal length of the optical lens when the adjustable focal length component is in the applied voltage state; EPD1 is the entrance pupil diameter of the optical lens when the adjustable focal length component is in the applied voltage state.

9. The optical lens according to any one of claims 1-3, characterized in that, |fl / fl-1| satisfies the following formula: |fl / fl-1|<3.1; Wherein, fl is the focal length of the first fixed-shape lens in the optical lens along the image-to-object direction, and fl-1 is the focal length of the second fixed-shape lens in the optical lens along the image-to-object direction.

10. The optical lens according to any one of claims 1-3, characterized in that, The optical lens satisfies the following formula: Imgh / TTL < 0.8; Where Imgh is half the diagonal length of the effective pixel area of ​​the electronic photosensitive element on the imaging surface corresponding to the optical lens, and TTL is the distance on the optical axis from the object side to the imaging surface corresponding to the optical lens of the first fixed-focus lens in the fixed-focus assembly along the object side to the image side.

11. The optical lens according to any one of claims 1-3, characterized in that, The optical lens satisfies the following formula: -2 <R21 / R22*CT2<0; Wherein, R21 is the radius of curvature of the object side surface of the first shaped fixed lens in the fixed focal length assembly along the object side to the image side direction, R22 is the radius of curvature of the image side surface of the second shaped fixed lens in the fixed focal length assembly along the object side to the image side direction, and CT2 is the center thickness of the second shaped fixed lens in the fixed focal length assembly along the object side to the image side direction in the optical axis direction.

12. The optical lens according to any one of claims 1-3, characterized in that, The optical lens satisfies the following formula: 0 <AT12 / ATL<3; Wherein, AT12 is the distance between the first and second shape-fixed lenses in the fixed focal length assembly along the object-side to image-side direction on the optical axis, and ATL is the distance between the first and second shape-fixed lenses in the fixed focal length assembly along the image-side to object-side direction on the optical axis.

13. The optical lens according to any one of claims 1-3, characterized in that, The optical lens satisfies the following formula: 1.5 < (CT2 + CT3) / CTL < 3.7; Wherein, CT2 is the center thickness of the second shape fixed lens in the fixed focal length assembly along the object side to the image side in the optical axis direction, CT3 is the center thickness of the third shape fixed lens in the fixed focal length assembly along the object side to the image side in the optical axis direction, and CTL is the center thickness of the first shape fixed lens in the fixed focal length assembly along the image side to the object side in the optical axis direction.

14. A camera module, characterized in that, Includes the optical lens as described in any one of claims 1-13.

15. An electronic device, characterized in that, Includes the camera module as described in claim 14.

16. The electronic device according to claim 15, characterized in that, The electronic device has a protective lens on its housing. The protective lens is used to protect the optical lens. The protective lens is the first lens in the optical lens that points from the object side to the image side.

Images