Optical lens, camera module, and electronic device

Abstract

An optical lens (102), a camera module (10), and an electronic device (1). The optical lens (102) comprises a first lens group (G1), a second lens group (G2) and a third lens group (G3), wherein the first lens group (G1), the second lens group (G2) and the third lens group (G3) are arranged in sequence in the direction from an object side to an image side of the optical lens (102); and the first lens group (G1) and the second lens group (G2) both have a positive focal power, and the first lens group (G1) and the second lens group (G2) are both configured to move along an optical axis to enable the optical lens to achieve zooming. The optical lens (102) has a first operating state and a second operating state, and a field of view FOV1 of the optical lens (102) in the first operating state is smaller than a field of view FOV2 thereof in the second operating state; and during switching from the first operating state to the second operating state, the first lens group (G1) is configured to move towards the image side, and the second lens group (G2) is configured to move towards the object side. The embodiments of the present application enables the camera module (10) to achieve optical zooming, and can reduce the total optical length during operation, thereby facilitating thinning of the electronic device (1).

Description

Optical lens, camera module and electronic device

[0001] The present application claims priority to the Chinese patent application No. 202411403174.2, filed on September 30, 2024, entitled "Optical lens, camera module and electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of camera, and in particular, to an optical lens, a camera module and an electronic device. BACKGROUND

[0003] In order to realize optical zoom of a camera lens of a mobile phone, a conventional solution is to set a zoom lens in the camera lens, and to switch focal lengths by moving the lens in the zoom lens. However, the total track length (TTL) of the zoom lens in the conventional solution is large when the zoom lens is working, which leads to the requirement of a large thickness of the mobile phone to meet the zoom requirement of the lens, and is not conducive to thinning of the mobile phone. SUMMARY

[0004] The present application provides an optical lens, a camera module and an electronic device, which can realize optical zoom of the camera module, and can reduce the TTL when working, and is conducive to thinning of the electronic device.

[0005] In a first aspect, an optical lens is provided, comprising a first lens group, a second lens group and a third lens group, the first lens group, the second lens group and the third lens group are arranged in sequence along a direction from an object side to an image side of the optical lens, the first lens group and the second lens group each have positive refractive power, and the first lens group and the second lens group are each configured to move along an optical axis to make the optical lens realize zoom, wherein the optical lens has a first working state and a second working state, a field of view FOV1 of the optical lens in the first working state is smaller than a field of view FOV2 of the optical lens in the second working state, and in a process of switching from the first working state to the second working state, the first lens group is configured to move toward the image side, and the second lens group is configured to move toward the object side.

[0006] In the embodiments of the present application, the first lens group, the second lens group and the third lens group are arranged in sequence from the object side to the object side, so that the first lens group and the second lens group are both positive focal power. Through the cooperation of the focal power of the first lens group and the second lens group, and the movement mode of the first lens group and the second lens group, two working states with different FOVs and different focal lengths, for example, a main camera state and a wide-angle state, can be formed respectively, so as to realize optical zoom. By moving the first lens group to the image side during the switching from the first working state to the second working state, the TTL in the second working state can be reduced. According to the optical principle, the TTL in the first working state can also be reduced. Therefore, the embodiments of the present application can reduce the TTL of the optical lens as a whole, which is beneficial to the thinning of the electronic device.

[0007] In the embodiments of the present application, the second lens group can move to the object side in the second working state, which is beneficial to increasing the FOV in the second working state, and meanwhile, the second lens group G2 can converge light rays, so as to balance the FOV and the imaging performance in the second working state.

[0008] In the embodiments of the present application, the first working state can be a main camera state, and the range of the equivalent focal length (unit: mm) of the optical lens can be [20, 35], for example, 24 mm. The second working state can be a wide-angle state, and the range of the equivalent focal length can be [10, 20), for example, 16 mm, 18 mm, etc.

[0009] In an implementation manner of the first aspect, the optical lens also has a retracted state, and the optical total length TTL0 of the optical lens in the retracted state is less than the optical total length TTL2 of the optical lens in the second working state. During the switching from the retracted state to the first working state, the first lens group is used to move to the object side, and the second lens group is used to move to the object side.

[0010] In the implementation manner, the “stretching and retracting” of the optical lens can be realized by the movement of the lens groups in the optical lens, so that the optical lens has the retracted state and the working state. This design can be applied to a liftable camera module, so as to meet the stroke requirement of the optical lens by using the external space of the electronic device, without increasing the thickness of the electronic device, and the imaging quality and thinness can be considered.

[0011] In an implementation manner of the first aspect, the optical total length TTL1 of the optical lens in the first working state and the optical total length TTL0 satisfy the following relationship: 0.1≤TTL1 / TTL0≤0.3.

[0012] In the present implementation, TTL1-TTL0 is the total stroke TTLd2 of the optical lens 102 rising, or the zoom stroke. In the case of the same zoom ratio, by limiting the range of the total stroke TTLd2, the TTLs in the two working states can be compressed, which is conducive to reducing the thickness of the electronic device 1. By setting the total stroke TTLd2 in the above smaller range, it is conducive to reducing the precision requirement of the zoom driving device of the optical lens 102, and ensuring the driving reliability of the zoom driving device.

[0013] In an implementation form of the first aspect, the effective focal length EFL2 of the optical lens in the second working state satisfies the following relationship with the half image height ImgH of the optical lens: 0.2≤EFL2 / ImgH≤1.0.

[0014] In the present implementation, arctan*2=FOV, so by limiting the range of EFL2 / ImgH, the range of FOV can be limited; and by limiting FOV in the range, the zoom ratio can be increased.

[0015] In an implementation form of the first aspect, the field of view FOV1∈[60°, 90°], and / or the field of view FOV2∈[90°, 150°].

[0016] In the present implementation, the FOV1 of the optical lens in the first working state can be larger, which is conducive to improving the shooting performance. The FOV2 of the optical lens in the second working state can be larger, which is conducive to improving the shooting performance.

[0017] In an implementation form of the first aspect, the effective focal length EFL1 of the optical lens in the first working state and the effective focal length EFL2 of the optical lens in the second working state satisfy the following relationship: 1<EFL1 / EFL2≤1.8.

[0018] In the present implementation, by limiting EFL1 / EFL2 in the above range, the optical lens 102 can have a wider zoom ratio range, and can zoom in a wider focal length range, thereby meeting diversified shooting requirements.

[0019] In an implementation form of the first aspect, the lens adjacent to the first lens group in the second lens group has positive focal power. In this way, the optical lens can have a larger aperture in the first working state.

[0020] In an implementation form of the first aspect, the lens closest to the image side in the optical lens has negative focal power. In this way, the optical distortion of the optical lens in the second working state can be corrected.

[0021] In an implementation form of the first aspect, a focal length f1 of a lens closest to the image side in the optical lens, and an effective focal length EFL1 of the optical lens in the first working state satisfy the following relationship: 0.1≤|f1 / EFL1|≤1.5. By limiting |f1 / EFL1| in the range as above, the optical distortion of the optical lens in the first working state and the second working state can be balanced.

[0022] In an implementation form of the first aspect, the number of lenses in the first lens group is at least 2, and / or the number of lenses in the second lens group is at least 1, and / or the number of lenses in the third lens group is at least 1. By designing the number of lenses in the three lens groups, a better zooming effect can be achieved.

[0023] In the second aspect, the embodiments of the present application provide a camera module, which comprises the optical lens and an image sensor. The image sensor is located on the image side of the optical lens. The embodiments of the present application can reduce the TTL of the optical lens as a whole, and further reduce the height of the camera module, which is conducive to the thinning of electronic devices.

[0024] In an implementation form of the second aspect, the camera module is used to be installed in an electronic device. The camera module comprises a module cover plate, which is arranged on the object side of the optical lens and accommodated in an opening of the electronic device. The module cover plate is used to move along the optical axis of the optical lens. By setting the liftable module cover plate, the external space of the electronic device can be used to meet the stroke requirement of the optical lens, without increasing the thickness of the electronic device, and the imaging quality and thinness can be considered.

[0025] In an implementation form of the second aspect, the camera module further comprises a diaphragm, which is located on the object side of the first lens group, the image side of the first lens group, or between the plurality of lenses in the first lens group.

[0026] The optical lens of the present implementation form can be used in combination with the diaphragm to achieve closer object distance photography, and meanwhile, the depth of field range of the whole picture in close object distance photography can be improved. The diaphragm can be designed in a front position to reduce the TTL of the optical lens. The diaphragm can also be designed in a middle position, which can make the difference value of the chief ray angle under different focal lengths smaller, which is conducive to reducing the system chromatic aberration.

[0027] In an implementation form of the second aspect, in the scheme of the diaphragm in the middle position, in order to ensure that the field of view FOV2 of the optical lens in the second working state (for example, the wide-angle state) meets the shooting requirement, the range of the sagittal height thickness ratio of the lens closest to the object side in the first lens group can be [0.5, 3.5], for example, [0.9, 3.0].

[0028] In an implementation form of the second aspect, in the scheme with the optical stop placed in the optical lens, TTL0 can be in the range of [5.0, 15.0], for example, [5.5, 13.5]; TTL1 can be in the range of [7.0, 20.0], for example, [7.0, 18.0]; TTL2 can be in the range of [6.0, 20.0], for example, [6.0, 16.0]; TTLd2 can be in the range of [1.0, 6.0], for example, [1.5, 5.0]; TTLd2 / TTL1 can be in the range of [0.1, 0.5], for example, [0.2, 0.3]; TTLd2 / TTL2 can be in the range of [0.1, 0.5], for example, [0.2, 0.4]; the effective focal length EFL1 of the optical lens in the first working state can be in the range of [4.0, 13.0], for example, [4.0, 9.0]; the effective focal length EFL2 of the optical lens in the second working state can be in the range of [3.0, 8.0], for example, [3.0, 7.0]; EFL1 / EFL2 can be in the range of [1.0, 2.5], for example, [1.0, 1.5]; the half image height ImgH can be in the range of [3.5, 10.0], for example, [3.5, 8.5]; EFL2 / ImgH can be in the range of [0.5, 1.0], for example, [0.6, 0.9]; f1 can be in the range of [-3.5, 10.0], for example, [-3.0, 9.0]; |f1 / EFL1| can be in the range of [0.1, 1.2], for example, [0.2, 1.0]; |f2 / EFL1| can be in the range of [0.5, 10.0], for example, [0.7, 9.0].

[0029] In an implementation form of the second aspect, in the front-stop solution, TTL0 can be in the range of [7.0, 12.0], for example, in the range of [8.0, 11.0]; TTL1 can be in the range of [10.0, 16.0], for example, in the range of [12.0, 15.0]; TTL2 can be in the range of [8.0, 15.0], for example, in the range of [10.0, 14.0]; TTLd2 can be in the range of [1.0, 5.0], for example, in the range of [3.0, 4.0]; TTLd2 / TTL1 can be in the range of (0.0, 0.5], for example, in the range of [0.2, 0.3]; TTLd2 / TTL2 can be in the range of (0.0, 0.5], for example, in the range of [0.2, 0.4]; the effective focal length EFL1 of the optical lens in the first working state can be in the range of [8.0, 10.0], for example, in the range of [8.0, 9.0]; the effective focal length EFL2 of the optical lens in the second working state can be in the range of [5.0, 10.0], for example, in the range of [6.0, 8.0]; EFL1 / EFL2 can be in the range of [1.0, 2.0], for example, in the range of [1.0, 1.5]; the half image height ImgH can be in the range of [4.0, 10.0], for example, in the range of [6.0, 8.5]; EFL2 / ImgH can be in the range of [0.5, 1.0], for example, in the range of [0.8, 1.0]; f1 can be in the range of [-12.0, -1.0], for example, in the range of [-10.0, -3.0]; |f1 / EFL1| can be in the range of (0.0, 2.0], for example, in the range of [0.3, 1.5]; |f2 / EFL1| can be in the range of [1.0, 6.0], for example, in the range of [1.5, 5.5].

[0030] In an implementation form of the second aspect, the focal length f2 of the lens in the optical lens, which is located on the light-emitting side of the diaphragm and adjacent to the diaphragm, and the effective focal length EFL1 of the optical lens in the first working state satisfy the following relationship: 0.5≤|f2 / EFL1|≤10. By limiting |f2 / EFL1| in the range as above, the relative illumination and imaging performance of the optical lens in the first working state can be improved.

[0031] In a third aspect, the embodiments of the present application provide an electronic device, which comprises a main body and the camera module. The camera module is installed on the main body. The camera module has a small thickness and occupies a small internal space of the electronic device, so that the electronic device can have a small thickness.

[0032] In an implementation form of the third aspect, the main body is provided with an opening; the camera module includes a module cover plate, the module cover plate is arranged at the object side of the optical lens and is used for covering the opening, and the module cover plate is further used for moving along the optical axis of the optical lens. By arranging the liftable module cover plate, the external space of the electronic device can be used to meet the stroke requirement of the optical lens, without increasing the thickness of the electronic device, and the imaging quality and thinness can be considered. BRIEF DESCRIPTION OF DRAWINGS

[0033] FIG. 1 is a schematic diagram of a planar structure of an electronic device according to an embodiment of the present application;

[0034] FIG. 2 is a schematic diagram of an A-A cross-sectional structure of the electronic device in FIG. 1;

[0035] FIG. 3 is a schematic diagram of a side view structure of an optical lens in a retracted state according to an embodiment of the present application;

[0036] FIG. 4 shows a structure and an optical path simulation diagram of the optical lens in FIG. 3 in a first working state;

[0037] FIG. 5 shows a structure and an optical path simulation diagram of the optical lens in FIG. 3 in a second working state;

[0038] FIG. 6 is a schematic diagram of a side view structure of an optical lens in a retracted state according to another embodiment of the present application;

[0039] FIG. 7 is a structure and an optical path simulation diagram of the optical lens in FIG. 6 in a first working state;

[0040] FIG. 8 is a structure and an optical path simulation diagram of the optical lens in FIG. 6 in a second working state;

[0041] FIG. 9 is a schematic diagram of a side view structure of an optical lens in a retracted state according to another embodiment of the present application;

[0042] FIG. 10 is a structure and an optical path simulation diagram of the optical lens in FIG. 9 in a first working state;

[0043] FIG. 11 is a structure and an optical path simulation diagram of the optical lens in FIG. 9 in a second working state;

[0044] FIG. 12 is a schematic diagram of a side view structure of an optical lens in a retracted state according to another embodiment of the present application;

[0045] FIG. 13 is a structure and an optical path simulation diagram of the optical lens in FIG. 12 in a first working state;

[0046] FIG. 14 is a structure and an optical path simulation diagram of the optical lens in FIG. 12 in a second working state;

[0047] FIG. 15 is a schematic diagram of a side view structure of an optical lens in a retracted state according to another embodiment of the present application;

[0048] Fig. 16 is a structure and light path simulation diagram of the optical lens in Fig. 15 in a first working state;

[0049] Fig. 17 is a structure and light path simulation diagram of the optical lens in Fig. 15 in a second working state;

[0050] Fig. 18 is a side view structure schematic diagram of an optical lens in a retracted state according to another embodiment of the present application;

[0051] Fig. 19 is a structure and light path simulation diagram of the optical lens in Fig. 18 in a first working state;

[0052] Fig. 20 is a structure and light path simulation diagram of the optical lens in Fig. 18 in a second working state;

[0053] Fig. 21 is a side view structure schematic diagram of an optical lens in a retracted state according to another embodiment of the present application;

[0054] Fig. 22 is a structure and light path simulation diagram of the optical lens in Fig. 21 in a first working state;

[0055] Fig. 23 is a structure and light path simulation diagram of the optical lens in Fig. 21 in a second working state;

[0056] Fig. 24 is a side view structure schematic diagram of an optical lens in a retracted state according to another embodiment of the present application;

[0057] Fig. 25 is a structure and light path simulation diagram of the optical lens in Fig. 24 in a first working state;

[0058] Fig. 26 is a structure and light path simulation diagram of the optical lens in Fig. 24 in a second working state. DETAILED DESCRIPTION

[0059] For the convenience of understanding, the following first explains and describes the English abbreviations and related technical terms involved in the embodiments of the present application.

[0060] Focal power, equal to the difference between the convergence degree of the image side beam and the convergence degree of the object side beam, which represents the ability of the optical system to deflect light rays.

[0061] A lens or lens group with positive focal power has a positive focal length and has the effect of converging light rays.

[0062] A lens or lens group with negative focal power has a negative focal length and has the effect of diverging light rays.

[0063] Focal length, also known as focal length, is a measure of the convergence or divergence of light in an optical system, which refers to the vertical distance from the optical center of the lens or lens group to the focal plane when the infinite scene passes through the lens or lens group to form a clear image. From a practical point of view, it can be understood as the distance from the lens center to the plane when the object is at infinity. For a fixed-focus lens, the position of the optical center is fixed; for an optical lens, the change of the optical center of the lens brings the change of the focal length of the lens.

[0064] Object side, with the lens as the boundary, the side where the object is located is the object side, and the surface close to the object side of the lens is called the object side.

[0065] Image side, with the lens as the boundary, the side where the image of the object is located is the image side, and the surface close to the image side of the lens is called the image side.

[0066] Aperture diaphragm, which is used to control the amount of light passing through the lens into the body of the light-sensitive surface, which is usually in the lens.

[0067] F-number, also known as F-number, is a relative value (the reciprocal of the relative aperture) derived from the focal length of the lens / the diameter of the entrance pupil of the lens. The smaller the F-number, the more light will enter in the same unit of time. The larger the F-number, the smaller the depth of field, and the background content of the photograph will be blurred, similar to the effect of an optical lens.

[0068] Total track length (TTL), which refers to the total length from the surface closest to the object side of the lens to the imaging surface, TTL is the main factor in determining the height of the camera.

[0069] Imaging surface, located on the image side of all lenses in the optical lens, and the light forms an image after passing through each lens in the optical lens.

[0070] Optical axis, an axis perpendicular to the center of the lens. The optical axis of the lens is the axis passing through the center of each lens in the lens. When parallel light enters a convex lens, the ideal convex lens should converge all light rays to a point behind the lens, which is the focal point. The direction of the optical axis is the extension direction of the optical axis.

[0071] Focal point, the convergence point of parallel light after refraction through a lens or lens group.

[0072] Image-side focal plane, also known as back focal plane or second focal plane, is a plane passing through the image-side focal point (also known as back focal point or second focal point) and perpendicular to the optical axis of the system.

[0073] Abbe number (Abbe), namely dispersion coefficient, is the difference ratio of the refractive index of optical material at different wavelengths, which represents the degree of material dispersion.

[0074] Field of view (FOV) is the angle formed by the two edges of the maximum range of the object image of the measured target through the lens of the optical instrument, with the lens of the optical instrument as the vertex. The size of the field of view angle determines the field of view of the optical instrument. The larger the field of view angle, the larger the field of view, and the smaller the optical magnification.

[0075] Half image height (ImgH) represents half of the diagonal length of the effective pixel area on the photosensitive chip, that is, the image height of the imaging surface.

[0076] Chief ray angle (CRA) is the maximum angle between the center of the optical lens and the normal line of the sensor surface when the light ray passes through the optical lens and reaches the sensor surface.

[0077] Aberration: The near-axis region of an optical system has the properties of an ideal optical system. A point on the object emits near-axis light rays that intersect at a point on the image plane (i.e., near-axis image point). However, actual light rays passing through different apertures of the lens are difficult to perfectly intersect at a point, and there is a certain deviation from the position of the near-axis image point. These differences are collectively referred to as aberration.

[0078] Longitudinal spherical aberration (longitudinal spherical aberration), also known as longitudinal chromatic aberration or position chromatic aberration or axial aberration, is a bundle of parallel light rays that converge at different positions before and after passing through the lens. This aberration is called position chromatic aberration or axial aberration. This is because the lens images different wavelengths of light at different positions, so that the image plane of different colors of light cannot coincide when the final image is formed, and the dispersion of the complex color light is formed.

[0079] Distortion, also known as distortion, is the degree of distortion of the image formed by the optical system relative to the object itself. Distortion is caused by the influence of the stop spherical aberration. The intersection height of the chief ray of different fields of view through the optical system and the Gaussian image plane is not equal to the ideal image height, and the difference between the two is the distortion. Therefore, distortion only changes the imaging position of the off-axis object point on the ideal plane, causing the shape of the image to be distorted, but does not affect the clarity of the image.

[0080] Astigmatism, due to the object point not on the optical axis of the optical system, the light beam emitted by it has an inclination angle with the optical axis. After refraction by the lens, the convergence points of the meridional pencil and the sagittal pencil are not in one point. That is, the light beam cannot be focused on a point, the image is not clear, so astigmatism is generated. Meridional pencil and sagittal pencil are the names of light beams in two perpendicular planes in a rotationally symmetric optical system.

[0081] Meridian plane, the plane formed by the principal ray (principal beam) of the object point outside the optical axis and the optical axis is called the meridian plane.

[0082] Sagittal surface, the plane passing through the principal ray (principal beam) of the object point outside the optical axis and perpendicular to the meridian plane is called the sagittal surface.

[0083] Curvature of field, the curvature of field is used to represent the difference between the position of the most clear image point of the non-central field of view and the position of the most clear image point of the central field of view after the light rays pass through the optical lens group. When the lens has field curvature, the intersection of the entire light beam does not coincide with the ideal image point, although a clear image point can be obtained at each specific point, but the entire image plane is a curved surface.

[0084] Embodiments of the present application provide an electronic device, which includes but is not limited to a mobile phone (a straight mobile phone or a foldable mobile phone), a tablet computer, a notebook computer, a vehicle-mounted device, a wearable device, augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses, a VR helmet, a laptop computer, a personal digital assistant (PDA), a camera or other devices with camera functions.

[0085] As shown in FIG. 1, for ease of description, the width direction of the electronic device 1 can be defined as the X-axis, and the length direction of the electronic device 1 can be defined as the Y-axis. The thickness direction of the electronic device 1 is the Z-axis. It can be understood that the coordinate system of the electronic device 1 can be flexibly set according to specific actual needs, and is not limited to the above description.

[0086] As shown in FIG. 1 and FIG. 2, the electronic device 1 can include a camera module 10, a housing 20, a display screen 30, and the like. It can be understood that the drawings in the embodiments of the present application only exemplarily show some components in the electronic device 1, and the actual structure, size, position and number of these components are not limited by the drawings shown. In the embodiments, the part of the electronic device 1 except the camera module 10 can be referred to as a main body. It is easy to understand that the main body includes the housing 20, the display screen 30, and the like, and the camera module 10 is installed in the main body.

[0087] As shown in FIG. 1 and FIG. 2, exemplarily, the housing 20 can include a first housing 201 and a second housing 202. The first housing 201 can be a rear shell (hereinafter referred to as rear shell 201), and the second housing 202 can be a middle frame (hereinafter referred to as middle frame 202). The rear shell 201 and the display screen 30 can be connected to two sides of the middle frame 202, respectively. The rear shell 201 and the middle frame 202 can enclose an internal space of the electronic device 1. Various devices such as a battery, a receiver, a microphone, and the like can be arranged in the internal space of the electronic device 1.

[0088] The display screen 30 shown in FIG. 2 is only a schematic and is not intended to limit the actual structure and mounting manner of the display screen 30. The display screen 30 can be a flat screen or a curved screen. When the electronic device 1 is some other form of device, the electronic device 1 can also not include the display screen 30.

[0089] As shown in FIG. 1 and FIG. 2, an opening 20a can be formed on the housing 20. The opening 20a communicates the internal and external spaces of the housing 20, or the internal and external spaces of the electronic device 1. In one embodiment, the opening 20a can be provided on the rear shell 201. In another embodiment, the opening 20a can be provided on the display screen 30, or on both the rear shell 201 and the display screen 30.

[0090] FIG. 1 and FIG. 2 show one camera module 10 of the electronic device 1, which is only a schematic and is not intended to limit the number of the camera module 10. According to needs, the electronic device 1 can also be provided with a plurality of camera modules 10.

[0091] In the embodiments, the camera module 10 can be a rear camera module, which collects light from one side of the rear shell 201. Alternatively, the camera module 10 can be a front camera module, which collects light from one side of the display screen 30.

[0092] In the embodiments, the camera module 10 can be a normal camera module, and the optical axis direction of the camera module 10 is the Z-axis direction.

[0093] The camera module 10 can include an optical lens and an image sensor, etc. The optical lens can include a plurality of lenses, and is configured to receive and process external light. The optical lens will be described in detail later. The image sensor is located on the image side of the optical lens, and the external light passing through the optical lens can be projected onto the image sensor to form an image. In an embodiment, the camera module 10 can further include a diaphragm configured to control the amount of light, including but not limited to a variable aperture. The position of the diaphragm can be determined as needed, including but not limited to being arranged on the object side of the optical lens (front diaphragm) or between the lenses in the optical lens (middle diaphragm).

[0094] As shown in FIG. 1 and FIG. 2, in an embodiment, the camera module 10 can include a module cover plate 101. The module cover plate 101 is exposed, and a user can see the module cover plate 101 from the outside of the electronic device 1. External light enters the optical lens through the module cover plate 101. In a non-working state, the module cover plate 101 can be accommodated in the opening 20a and cover the opening 20a. For example, the camera module 10 can be a rear camera module, and the module cover plate 101 can be accommodated in the opening 20a on the rear shell 201, and the light entrance side of the camera module 10 is arranged opposite to the display surface 30a of the display screen 30, wherein the display surface 30a is the surface on which the display screen 30 displays images. If the camera module 10 is a front camera module, the module cover plate 101 is accommodated in the opening 20a on the display screen 30. It can be understood that the electronic device 1 can also include camera modules 10 that are both rear camera modules and front camera modules.

[0095] In this embodiment, the module cover plate 101 can move along the normal direction of the display screen 30 of the electronic device 1, for example, move along the Z direction in FIG. 2. Referring to FIG. 2, in an embodiment, the module cover plate 101 can be lifted along the Z direction and separated from the opening 20a to protrude from the rear shell 201. The module cover plate 101 can also be lowered along the Z direction and fall back into the opening 20a. The module cover plate 101 can be lifted and lowered under the drive of a driving device (such as a motor, a transmission mechanism, etc.), which can belong to the camera module 10 or be independent of the camera module 10.

[0096] In the embodiment, when the camera module 10 is in the working mode, some lenses in the optical lens can move along the optical axis direction (for example, the Z direction in FIG. 2) of the optical lens, so that the camera module 10 realizes zooming. Referring to FIG. 2, when the module cover plate 101 rises, the lenses have space to move upward, so as to realize zooming, large-stroke auto focus (AF) movement, improve focusing speed, and improve focusing performance in dark environments. In some cases, the camera module 10 can also have space for optical image stabilization (OIS) movement, which facilitates improving the imaging quality through OIS movement.

[0097] In the embodiment, when the camera module 10 is in the non-working mode, that is, the camera module 10 is not in any specific operation or function setting state, for example, a power-off state, a standby state, etc., the lenses in the optical lens can return to the retracted state, and the module cover plate 101 can be lowered and accommodated in the opening 20a. At this time, the electronic device 1 restores the initial appearance and does not affect the thickness experience of the electronic device 1.

[0098] Therefore, the scheme of the embodiment can utilize the external space of the electronic device 1 to meet the stroke needs of the optical lens, without increasing the thickness of the electronic device 1, so that the imaging quality and thinness can be considered.

[0099] In another embodiment, the internal space of the electronic device 1 can meet the stroke needs of the optical lens, and the module cover plate 101 can also be fixedly arranged without lifting.

[0100] The above outlines the principle structure of the camera module 10, and the structure and working principle of the optical lens will be described in detail below.

[0101] FIG. 3 is a side view structural schematic diagram of the optical lens 102 in an embodiment. FIG. 3 also shows the diaphragm 105, the optical filter 103, and the image sensor 104 in the camera module 10. Among them, the optical lens 102, the optical filter 103, and the image sensor 104 are arranged in sequence along the optical axis O (along the Z direction in FIG. 3), and the optical filter 103 and the image sensor 104 are both located on the image side of the optical lens 102. The diaphragm 105 can be arranged between the lenses of the optical lens 102, for example.

[0102] In the embodiment, the optical lens 102 includes at least three lens groups, and each lens group includes a plurality of lenses. For example, as shown in FIG. 3, the optical lens 102 can include a first lens group G1, a second lens group G2, and a third lens group G3. The first lens group G1, the second lens group G2, and the third lens group G3 are arranged in sequence along the optical axis O and in sequence along the direction from the object side to the image side of the optical lens 102.

[0103] In this embodiment, the first lens group G1 has at least two lenses, as shown in FIG. 3. For example, the first lens group G1 can include five lenses, i.e., lens L1, lens L2, lens L3, lens L4, and lens L5. The second lens group G2 has at least one lens, as shown in FIG. 3. For example, the second lens group G1 can include three lenses, i.e., lens L6, lens L7, and lens L8. The third lens group G3 has at least one lens, as shown in FIG. 3. For example, the third lens group G3 can include one lens, i.e., lens L9.

[0104] In this embodiment, the material of the lenses includes, but is not limited to, glass or plastic, or a combination of glass and plastic, which is not specifically limited herein.

[0105] As shown in FIG. 3, the diaphragm 105 is designed to be centrally located in the diaphragm. For example, the diaphragm 105 can be arranged between the lenses in the first lens group G1, such as between the lens L2 and the lens L3. In another embodiment, the diaphragm 105 can also be arranged at any other suitable position in the first lens group G1, such as on the object side of the first lens group G1, such as the object side of the lens L1, or on the image side of the first lens group G1, such as the image side of the lens L5, or between any two lenses in the first lens group G1. By using the centrally located diaphragm design, the CRA difference of the optical lens 102 at different focusing segments can be small, which is beneficial to reducing the system chromatic aberration.

[0106] It can be understood that the lens parameters in the optical lens 102 can be determined as needed, and various lens parameters in the optical lens 102 will be exemplarily listed in the form of a table below. Among them, an optical lens 102 with a set of lens parameters and a position design of the diaphragm 105 can be referred to as an architecture, each architecture corresponds to a number (for example, architecture number 1), each architecture includes an architecture composition (for example, the position of the diaphragm 105 in the optical lens 102), the surface number (numbered in the direction from the object side to the image side, including the object plane, the virtual surface No. 1, the entrance and exit surfaces of each lens, the entrance and exit surfaces of the optical filter 103, and the imaging surface) and the lens parameters (including surface type, Y radius, thickness, refractive index Nd, Y half aperture, normalized radius, quadratic surface constant, and non-spherical surface coefficient of each order) under the architecture composition.

[0107] For example, in the surface type, the Qcon aspherical surface indicates that the aspherical surface type z of the lens can be defined using the following aspherical surface formula:

[0108] wherein z is the sag of the aspherical surface, c is the spherical curvature at the vertex of the aspherical surface, r is the radial coordinate of the aspherical surface, k is the quadratic surface constant, and u = r / r n , r nwhere a is the normalized radius m where a is the normalized radius con coefficients of the polynomial, where a is the normalized radius con polynomial.

[0109] Exemplarily, in the surface type, the Qbfs aspherical surface represents the aspherical surface type z of the lens can be defined using the following aspherical surface formula:

[0110] where z is the sag of the aspherical surface, c is the vertex spherical curvature of the aspherical surface, r is the radial coordinate of the aspherical surface, k is the conic constant, and u = r / r n where a is the normalized radius n where a is the normalized radius m where a is the normalized radius bfs coefficients of the polynomial, where a is the normalized radius bfs polynomial.

[0111] Table 1a lists part of the lens parameters of the architecture 1 corresponding to the optical lens 102 in FIG. 3, wherein: the stop 105 can be located between the lenses L2 and L3 (may be referred to as stop in the middle), the surface number is corresponded to the entrance surface and the exit surface of each lens (for example, the entrance surface of the lens L1 is surface 2, and the exit surface is surface 3, and so on), and the thickness corresponding to each surface is the gap between the surface and the next adjacent surface (for example, the 0.658014 corresponding to the surface number 2 is the gap between the surface 2 and the surface 3, and BK7 SCHOTT represents a kind of glass material adopted by the filter 103.

[0112] Part of the lens parameters of the architecture 1 in Table 1a

[0113] Table 1b and Table 1c show other lens parameters of each lens surface in Table 1a, including Y radius, normalized radius, and conic constant and 4-30 order aspherical surface coefficients of each lens surface in Table 1a.

[0114] Part of the lens parameters of the architecture 1 in Table 1a

[0115] Part of the lens parameters of the architecture 1 in Table 1a

[0116] The actuation mode and working principle of the optical lens 102 will be described below in combination with FIGS. 3-5.

[0117] In this embodiment, the first lens group G1 has positive focal power, wherein the focal power of each lens in the first lens group G1 can be set as needed, which is not limited in this embodiment.

[0118] In this embodiment, the second lens group G2 has positive focal power, wherein the focal power of each lens in the first lens group G1 can be set as needed, which is not limited in this embodiment. As shown in FIG. 3, for example, the lens adjacent to the first lens group G1 in the second lens group G2 can have positive focal power, for example, the lens L6 can have positive focal power, so as to ensure that the optical lens 102 has a large aperture in the main camera state (which will be described below).

[0119] In this embodiment, the third lens group G3 has negative focal power, for example.

[0120] For example, as shown in FIG. 3, when the camera module 10 is in a non-working mode, the optical lens 102 can be in a retracted state. In the retracted state, the first lens group G1, the second lens group G2 and the first lens group G3 can be close together, and the total optical length TTL0 of the optical lens 102 is the smallest. As described above, when the camera module 10 includes a liftable module cover 101, the module cover 101 can be accommodated in the opening 20a at this time, so that the electronic device 1 maintains a small thickness.

[0121] When the camera module 10 is in a working mode, the first lens group G1 and the second lens group G2 can move along the optical axis of the optical lens 102 to switch the state of the optical lens 102, so that the optical lens 102 realizes zooming. Details will be described below.

[0122] FIG. 4 shows the optical path when the optical lens 102 is in a first working state. In combination with FIGS. 3 and 4, in the process of switching from the retracted state to the first working state, the first lens group G1 can move towards the object side along the optical axis, the second lens group G2 can move towards the object side along the optical axis, and the position of the third lens group G3 can be fixed. For example, in the process of switching from the retracted state to the first working state, the first lens group G1 has a large stroke, and the second lens group G2 has a small stroke. In the first working state, the first lens group G1 can be used for zooming; the second lens group G2 can be used as a compensation group to compensate for aberrations. It can be understood that in the process of switching from the retracted state to the first working state, the total optical length of the optical lens 102 increases, and the TTL1 of the optical lens 102 in the first working state is greater than the TTL0 in the retracted state.

[0123] For example, in the first working state, the equivalent focal length of the camera module 10 can be 24 mm, and the camera module 10 can realize main camera shooting, so the first working state can also be called main camera state.

[0124] Figure 5 shows the light path when the optical lens 102 is in the second working state. In combination of Figures 4 and 5, in the process of switching from the first working state to the second working state, the first lens group G1 can move towards the image side along the optical axis, the second lens group G2 can move towards the object side along the optical axis, and the position of the third lens group G3 can be fixed. It can be understood that in the process of switching from the first working state to the second working state, the total optical length of the optical lens 102 decreases, and the TTL2 of the optical lens 102 in the second working state is smaller than the TTL1 in the first working state.

[0125] For example, in the second working state, the equivalent focal length of the camera module 10 can be 16mm, and wide-angle shooting can be achieved, so the second working state can also be referred to as a wide-angle state.

[0126] In this embodiment, the field of view FOV1 of the optical lens 102 in the first working state is smaller than the field of view FOV2 in the second working state.

[0127] For example, the field of view FOV1 of the optical lens 102 in the first working state (e.g. main shooting state) is ∈[60°, 90°], for example, FOV1 is 60°, 75°, 90°, etc. The scheme of this embodiment can make the FOV1 of the optical lens 102 in the first working state larger, thereby improving the shooting performance.

[0128] For example, the field of view FOV2 of the optical lens 102 in the second working state (e.g. wide-angle state) is ∈[90°, 150°], for example, FOV2 is 90°, 120°, 150°, etc. The scheme of this embodiment can make the FOV2 of the optical lens 102 in the second working state larger, thereby improving the shooting performance.

[0129] For example, in the scheme of placing the diaphragm, in order to ensure that the field of view FOV2 of the optical lens 102 in the second working state (e.g. wide-angle state) meets the shooting needs, the range of the sagittal height-thickness ratio of the lens L1 closest to the object side in the first lens group G1 can be [0.5, 3.5], for example, 0.5, 0.983, 1.184, 1.348, 1.452, 2.198, 2.82, 3.5, etc. Wherein, the sagittal height-thickness ratio is the ratio of the maximum sagittal height of the lens to the central thickness. In an embodiment, the range of the sagittal height-thickness ratio can be [0.9, 3.0], etc.

[0130] The above takes the optical lens 102 switching from the retracted state to the first working state and then to the second working state as an example, which is merely an example. In practice, the optical lens 102 can also switch from the retracted state to the second working state directly. In this process, the first lens group G1 can move towards the object side along the optical axis, the second lens group G2 can move towards the object side along the optical axis, and the position of the third lens group G3 can be fixed, as shown in FIG. 3 and FIG. 5. It can be understood that TTL2 is greater than TTL0. Therefore, the relationship of the total optical length of the optical lens 102 in the three states is: TTL0 < TTL2 < TTL1.

[0131] For example, when the camera module 10 includes the liftable module cover plate 101, the optical lens 102 can perform state switching after the module cover plate 101 is lifted, and part of the optical lens 102 can extend out of the opening 20a. After the shooting is completed, the optical lens 102 can return to the retracted state, and the module cover plate 101 can fall back and reseal the opening 20a.

[0132] In this embodiment, by configuring the focal power of the first lens group G1 and the second lens group G2 to be positive, and by making the two groups realize zoom through the above-mentioned actuation mode, the optical lens 102 can become a zoom lens, for example, a zoom lens that can realize the combination of a main camera and a wide-angle camera (referred to as main-wide-angle combination). Thus, this embodiment can make the camera module 10 have a smaller size, which is conducive to the miniaturization of the electronic device 1; can reduce the cost; and can also be matched with a large-base image sensor, which is conducive to improving the imaging quality.

[0133] In this embodiment, the first lens group G1 has positive focal power, and in the process of switching from the first working state (for example, the main camera state) to the second working state (for example, the wide-angle state), the first lens group G1 moves towards the image side, which is conducive to reducing TTL2 in the second working state. According to optical principles, this is also conducive to reducing TTL1 in the first working state. In summary, this embodiment can reduce the TTL of the optical lens 102 in the entire working state, which makes the electronic device 1 not need to have a large thickness to meet the lens stroke, which is conducive to the thinning of the electronic device 1.

[0134] In addition, in the process of switching to the first working state, for example, in the process of switching from the retracted state to the first working state, or in the process of switching from the second working state to the first working state, by moving the first lens group G1 towards the object side, the performance of the optical lens 102 in the first working state can be ensured, for example, the balance of the modulation transfer function (Modulation Transfer Function, MTF) or other imaging quality.

[0135] In addition, since the second lens group G2 has positive refractive power, in the process of switching from the retracted state to the first working state, the second lens group G2 can move towards the object side, which makes the optical lens 102 have the effect of correcting the system axial chromatic aberration in the first working state, balancing the system axial chromatic aberration in the first working state and the TTL. Since the second lens group G2 has positive refractive power, in the process of switching from the retracted state to the second working state, the second lens group G2 can move towards the object side, which is beneficial to increase the FOV in the second working state, and at the same time the second lens group G2 can converge light rays, which can balance the FOV and the imaging performance (such as reducing the spherical aberration, distortion, etc.) in the second working state.

[0136] Table 2 lists a plurality of parameters of the optical lens 102 corresponding to the above-mentioned architecture 1.

[0137] Table 2 lists a plurality of parameters of the optical lens 102 corresponding to the above-mentioned architecture 1.

[0138] For example, the total optical length TTL1 of the optical lens 102 in the first working state and the total optical length TTL0 in the retracted state can satisfy the following relationship: 0.1≤(TTL1-TTL0) / TTL1≤0.3. Wherein, TTL1-TTL0 is the total stroke TTLd2 of the optical lens 102 rising, or the zoom stroke. TTLd2 / TTL1 can be 0.1, 0.2, 0.3, etc. For example, as shown in Table 2, TTL1 can be 16.159mm, TTL0 can be 11.884mm, at this time the total stroke TTLd2 of the system pop-up is 4.275mm, and the ratio of TTLd2 to TTL1 is 0.265.

[0139] In the case of the same zoom ratio (i.e. the optical zoom ratio), by limiting the range of the total stroke TTLd2, the TTL in the two working states can be compressed, which is beneficial to reduce the thickness of the electronic device 1. By setting the total stroke TTLd2 (i.e. the zoom stroke) in the above-mentioned smaller range, it is beneficial to reduce the precision requirement of the zoom driving device (such as a zoom motor) of the optical lens 102, and to ensure the driving reliability of the zoom driving device.

[0140] The above is only an example, and in fact in the embodiments of the present application, for the architecture with the stop in the middle:

[0141] The range of TTL0 can be [5.0, 15.0], for example [5.5, 13.5], and TTL0 can be 5.0, 5.5, 10.0, 13.5, 15.0, etc.

[0142] The TTL1 can range from [7.0, 20.0], for example, [7.0, 18.0], and exemplarily can be 7.0, 10.0, 18.0, 20.0, etc.

[0143] The TTL2 can range from [6.0, 20.0], for example, [6.0, 16.0], and exemplarily can be 6.0, 13.0, 16.0, 20.0, etc.

[0144] The TTLd2 can range from [1.0, 6.0], for example, [1.5, 5.0], and exemplarily can be 1.0, 1.5, 5.0, 6.0, etc.

[0145] The TTLd2 / TTL1 can range from [0.1, 0.5], for example, [0.2, 0.3], and exemplarily can be 0.1, 0.2, 0.26, 0.3, 0.5, etc.

[0146] The TTLd2 / TTL2 can range from [0.1, 0.5], for example, [0.2, 0.4], and exemplarily can be 0.1, 0.2, 0.35, 0.4, 0.5, etc. Exemplarily, the effective focal length EFL2 of the optical lens 102 in the second working state and the half image height ImgH of the optical lens 102 can satisfy the following relationship: 0.2≤EFL2 / ImgH≤1.0. For example, EFL2 / ImgH can be 0.2, 0.81, 1.0, etc. Exemplarily, EFL2 can be 6.856 mm, and ImgH can be 8.093 mm, so that EFL2 / ImgH is 0.847.

[0147] arctan(ImgH / EFL2)*2=FOV, thus by limiting the range of EFL2 / ImgH, the range of FOV can be limited; and by limiting FOV in the range, the zoom ratio can be increased.

[0148] Exemplarily, the effective focal length EFL1 of the optical lens 102 in the first working state and the effective focal length EFL2 in the second working state can satisfy the following relationship: 1 < EFL1 / EFL2≤1.8. In an embodiment, EFL1 and EFL2 satisfy the relationship: 1 < EFL1 / EFL2≤1.5. Exemplarily, EFL1 can be 8.880mm, and EFL2 can be 6.856mm, in which case EFL1 / EFL2 is 1.295. In another embodiment, EFL1 can be 8.889mm, and EFL2 can be 6.130, in which case EFL1 / EFL2 is 1.450; or EFL1 / EFL2 can be 1.8. By limiting EFL1 / EFL2 to the above range, the optical lens 102 can have a large zoom ratio, and can zoom in a wide focal length range, thereby meeting diverse shooting requirements.

[0149] Exemplarily, the most image-side lens in the optical lens 102 (e.g., lens L9 in FIG. 3) can have a negative focal power. This design can correct the optical distortion of the optical lens 102 in the second working state.

[0150] Exemplarily, the focal length f1 of the most image-side lens in the optical lens 102 (e.g., lens L9 in FIG. 3) and the effective focal length EFL1 of the optical lens 102 in the first working state can satisfy the following relationship: 0.1≤|f1 / EFL1|≤1.5. Exemplarily, f1 can be -8.757mm, and EFL1 can be 8.880mm, in which case |f1 / EFL1| is 0.986. Or in another embodiment, f1 can be -8.249, and EFL1 can be 8.889, in which case |f1 / EFL1| is 0.928. By limiting |f1 / EFL1| to the above range, the optical distortion in the two working states can be balanced.

[0151] For example, the focal length f2 of the lens (e.g., lens L3 in FIGS. 3-5) in the optical lens 102 located on the light exit side of the stop 105 and adjacent to the stop 105 can satisfy the following relationship with the effective focal length EFL1 of the optical lens 102 in the first working state: 0.5≤|f2 / EFL1|≤10. For example, f2 can be 17.712, EFL1 can be 8.880, and |f2 / EFL1| can be 1.995. In another example, f2 can be 13.180, EFL1 can be 8.889, and |f2 / EFL1| can be 1.483; or f2 can be -11.758, EFL1 can be 4.470, and |f2 / EFL1| can be 2.630; or |f2 / EFL1| can be 0.5 or 10. By limiting |f2 / EFL1| to the above range, the relative illumination and imaging performance of the optical lens 102 in the first working state can be improved.

[0152] As shown in Table 2, the aperture value F1 of the optical lens 102 in the first working state can be smaller than the aperture value F2 in the second working state. The above is merely an example, and in fact, in the embodiments of the present application, for the architecture with the stop in the middle:

[0153] The effective focal length EFL1 of the optical lens 102 in the first working state can be in the range of [4.0, 13.0], for example, [4.0, 9.0], and for example, 4.0, 5.0, 9.0, 11.0, 13.0, etc.

[0154] The effective focal length EFL2 of the optical lens 102 in the second working state can be in the range of [3.0, 8.0], for example, [3.0, 7.0], and for example, 3.0, 5.0, 7.0, 8.0, etc.

[0155] The range of EFL1 / EFL2 can be [1.0, 2.5], for example, [1.0, 1.5].

[0156] The range of the half image height ImgH can be [3.5, 10.0], for example, [3.5, 8.5], and for example, 3.5, 8.093, 8.5, 10.0, etc.

[0157] The range of EFL2 / ImgH can be [0.5, 1.0], for example, [0.6, 0.9].

[0158] The range of f1 can be [-3.5, 10.0], for example, [-3.0, 9.0], and for example, -3.5, 8.5, 9.0, 10.0, etc.

[0159] |f1 / EFL1| can range from [0.1, 1.2], for example [0.2, 1.0].

[0160] |f2 / EFL1| can range from [0.5, 10.0], for example [0.7, 9.0].

[0161] Based on the above embodiments, Figs. 6-8 illustrate another embodiment of optical lens 102 with a stop in the middle. Fig. 6 is a schematic view of the optical lens 102 in a collapsed state, Fig. 7 is a schematic view of the optical lens 102 in a first working state, and Fig. 8 is a schematic view of the optical lens 102 in a second working state. Table 3a lists the partial lens parameters of architecture 2 for the optical lens 102 in Figs. 6-8, where the stop 105 can be located between lenses L2 and L3, the surface numbers are matched with the entrance and exit surfaces of each lens (for example, the entrance surface of lens L1 is surface 2 and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a glass material used for the filter 103. In which, the thickness of surface number 12 is 4.592621 / 0.099614, which means that the gap between surface 12 and surface 13 is 4.592621 in one state and 0.099614 in another state. The same applies hereinafter. In the embodiments of the present application, the lens group in the optical lens 102 moves along the optical axis (which will be described hereinafter), so that the thickness changes. Therefore, the following tables use the above-mentioned method to express the changing thickness.

[0162] Table 3a Partial lens parameters of optical lens in architecture 2

[0163] Tables 3b and 3c illustrate other lens parameters of each lens surface in Table 3a, including Y radius, normalized radius, and quadratic surface constants and 4-30 order aspherical coefficients of each lens surface in Table 3.

[0164] Table 3b Partial lens parameters of optical lens in architecture 2

[0165] Table 3c Partial lens parameters of optical lens in architecture 2

[0166] Table 4 below lists a plurality of parameters of the optical lens 102 corresponding to architecture 2. The parameters listed in Table 4 can be adapted to the corresponding parameter ranges or relationships described above, which will not be repeated here.

[0167] Table 4 Summary of a plurality of parameters of optical lens 102 in architecture 2 (stop in the middle)

[0168] Based on the above embodiment, Figs. 9-11 illustrate another embodiment of optical lens 102 with the stop in the middle. Fig. 9 is a schematic view of the optical lens 102 in the collapsed state, Fig. 10 is a schematic view of the optical lens 102 in the first working state, and Fig. 11 is a schematic view of the optical lens 102 in the second working state.

[0169] Table 5a lists the partial lens parameters of architecture 3 corresponding to the optical lens 102 in Figs. 9-11, where the stop 105 can be located between lenses L2 and L3, the surface numbers are corresponding to the entrance and exit surfaces of each lens (e.g. the entrance surface of lens LI is surface 2 and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a glass material used for the filter 103.

[0170] Table 5a lists the partial lens parameters of architecture 3 corresponding to the optical lens 102 in Figs. 9-11, where the stop 105 can be located between lenses L2 and L3, the surface numbers are corresponding to the entrance and exit surfaces of each lens (e.g. the entrance surface of lens LI is surface 2 and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a glass material used for the filter 103.

[0171] Tables 5b and 5c illustrate other lens parameters of each lens surface in Table 5a, including Y radius, normalized radius, and conic constant and 4-30th order aspherical coefficients of each lens surface in Table 5a.

[0172] Table 5a lists the partial lens parameters of architecture 3 corresponding to the optical lens 102 in Figs. 9-11, where the stop 105 can be located between lenses L2 and L3, the surface numbers are corresponding to the entrance and exit surfaces of each lens (e.g. the entrance surface of lens LI is surface 2 and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a glass material used for the filter 103.

[0173] Table 5a lists the partial lens parameters of architecture 3 corresponding to the optical lens 102 in Figs. 9-11, where the stop 105 can be located between lenses L2 and L3, the surface numbers are corresponding to the entrance and exit surfaces of each lens (e.g. the entrance surface of lens LI is surface 2 and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a glass material used for the filter 103.

[0174] Table 6 below lists the parameters of the optical lens 102 of architecture 3. The parameters listed in Table 6 can be adapted to the corresponding parameter ranges or relationships described above and will not be repeated here.

[0175] Table 6 lists the parameters of the optical lens 102 of architecture 3. The parameters listed in Table 6 can be adapted to the corresponding parameter ranges or relationships described above and will not be repeated here.

[0176] Based on the above embodiment, Figs. 9-11 illustrate another embodiment of optical lens 102 with the stop in the middle. Fig. 9 is a schematic view of the optical lens 102 in the collapsed state, Fig. 10 is a schematic view of the optical lens 102 in the first working state, and Fig. 11 is a schematic view of the optical lens 102 in the second working state.

[0177] Table 7a lists the partial lens parameters of the optical lens 102 of Figs. 12-14 corresponding to the architecture 4, wherein: the stop 105 can be located between the lenses L2 and L3, the surface numbers are corresponding to the entrance and exit surfaces of the respective lenses (e.g. the entrance surface of the lens LI is surface 2 and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a glass material used for the filter 103.

[0178] Table 7a lists the partial lens parameters of the optical lens 102 of Figs. 12-14 corresponding to the architecture 4, wherein: the stop 105 can be located between the lenses L2 and L3, the surface numbers are corresponding to the entrance and exit surfaces of the respective lenses (e.g. the entrance surface of the lens LI is surface 2 and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a glass material used for the filter 103.

[0179] Tables 7b and 7c illustrate other lens parameters of each lens surface in Table 7a, including the Y radius, the normalized radius, and the conic constant and the 4-30th order aspheric coefficients of each lens surface in Table 7a.

[0180] Table 7a lists the partial lens parameters of the optical lens 102 of Figs. 12-14 corresponding to the architecture 4, wherein: the stop 105 can be located between the lenses L2 and L3, the surface numbers are corresponding to the entrance and exit surfaces of the respective lenses (e.g. the entrance surface of the lens LI is surface 2 and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a glass material used for the filter 103.

[0181] Table 7a lists the partial lens parameters of the optical lens 102 of Figs. 12-14 corresponding to the architecture 4, wherein: the stop 105 can be located between the lenses L2 and L3, the surface numbers are corresponding to the entrance and exit surfaces of the respective lenses (e.g. the entrance surface of the lens LI is surface 2 and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a glass material used for the filter 103.

[0182] Table 8 below lists the parameters of the optical lens 102 corresponding to the architecture 4. The parameters listed in Table 8 can be adapted to the corresponding parameter ranges or relationships described above, which are not repeated here.

[0183] Table 8 lists the parameters of the optical lens 102 corresponding to the architecture 4. The parameters listed in Table 8 can be adapted to the corresponding parameter ranges or relationships described above, which are not repeated here.

[0184] Based on the above embodiments, Figs. 15-17 illustrate another embodiment of the optical lens 102 with a stop in the middle. In Figs. 15-17, Fig. 15 is a schematic view of the optical lens 102 in a collapsed state, Fig. 16 is a schematic view of the optical lens 102 in a first working state, and Fig. 17 is a schematic view of the optical lens 102 in a second working state.

[0185] Table 9a lists the partial lens parameters of the optical lens 102 of Figs. 12-14 corresponding to the architecture 5, wherein: the stop 105 can be located between the lenses L2 and L3, the surface numbers are corresponding to the entrance and exit surfaces of the respective lenses (e.g. the entrance surface of the lens LI is surface 2 and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a glass material used for the filter 103.

[0186] Table 9a lists the partial lens parameters of the optical lens 102 of Figs. 12-14 corresponding to the architecture 5, wherein: the stop 105 can be located between the lenses L2 and L3, the surface numbers are corresponding to the entrance and exit surfaces of the respective lenses (e.g. the entrance surface of the lens LI is surface 2 and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a glass material used for the filter 103.

[0187] Table 9b and Table 9c illustrate other lens parameters for each lens surface in Table 9a, including Y radius, normalized radius, and conic constant and 4-30th order aspherical coefficients for each lens surface in Table 9a.

[0188] Table 9b Partial lens parameters of optical lens in Architecture 5

[0189] Table 9c Partial lens parameters of optical lens in Architecture 5

[0190] Table 10 below lists a plurality of parameters of the optical lens 102 in Architecture 5. The parameters listed in Table 10 can be adapted to the corresponding parameter ranges or relationships described above, which are not repeated here.

[0191] Table 10 Summary of parameters of optical lens 102 in Architecture 4 (iris in middle)

[0192] Based on the above embodiments, FIGS. 18-20 illustrate another embodiment of an optical lens 102 employing iris in middle. Among them, FIG. 18 is a schematic diagram of the optical lens 102 in the collapsed state, FIG. 19 is a schematic diagram of the optical lens 102 in the first working state, and FIG. 20 is a schematic diagram of the optical lens 102 in the second working state.

[0193] Table 11a lists partial lens parameters of Architecture 6 in another embodiment, wherein: the iris 105 can be located between the lenses L1 and L2, the surface numbers are corresponding to the entrance and exit surfaces of each lens (for example, the entrance surface of the lens L1 is surface 2, and the exit surface is surface 3, and so on), and BK7 SCHOTT represents a kind of glass material adopted by the filter 103.

[0194] Table 11a Partial lens parameters of optical lens in Architecture 6

[0195] Table 11b and Table 11c illustrate other lens parameters for each lens surface in Table 11a, including Y radius, normalized radius, and conic constant and 4-30th order aspherical coefficients for each lens surface in Table 11a.

[0196] Table 11b Partial lens parameters of optical lens in Architecture 6

[0197] Table 11c. Partial lens parameters of the optical lens in Architecture 6

[0198] Table 12 below lists a plurality of parameters of the optical lens 102 corresponding to Architecture 6. The parameters listed in Table 12 can all be adapted to the corresponding parameter ranges or relational expressions above, which will not be repeated here.

[0199] Table 12. Summary of a plurality of parameters of the optical lens 102 in Architecture 6 (aperture in the middle)

[0200] The above embodiment adopts the design of aperture in the middle, which can make the CRA difference under different focal lengths smaller, which is beneficial to reduce the system chromatic aberration. The embodiment to be described below can change the aperture in the middle to aperture in front based on the above embodiment, that is, the aperture 105 is arranged on the object side of the optical lens 102. The following will be described.

[0201] As shown in FIGS. 21-23, in an embodiment, the aperture 105 can be arranged on the object side of the optical lens 102, that is, on the object side of the lens L1. Since the thickness of the aperture 105 is not included in the TTL of the optical lens 102, the TTL of the optical lens 102 in this embodiment is smaller.

[0202] The optical lens 102 shown in FIG. 21 can be in a retracted state, the optical lens 102 shown in FIG. 22 can be in a first working state, and the optical lens 102 shown in FIG. 23 can be in a second working state. The actuation mode and working principle of the optical lens 102 shown in FIGS. 21-23 are the same as above, which will not be repeated here.

[0203] For example, in the first working state, the equivalent focal length of the camera module 10 can be about 24 mm, and the camera module 10 can realize primary camera shooting, so the first working state can also be called primary camera state. For example, in the second working state, the equivalent focal length of the camera module 10 can be about 18 mm, which can realize wide-angle shooting, so the second working state can also be called wide-angle state.

[0204] In this embodiment, by configuring the optical powers of the first lens group G1 and the second lens group G2 to be positive, and making both of them realize zooming through the above-mentioned actuation mode, the optical lens 102 can become a zoom lens, for example, a zoom lens that can realize the combination of primary camera and wide-angle (referred to as primary-wide-angle combination). Thus, this embodiment can make the camera module 10 have a smaller size, which is beneficial to realize the miniaturization of the electronic device 1; can reduce the cost; and can also be matched with a large-format image sensor, which is beneficial to improve the imaging quality.

[0205] It can be understood that the lens parameters in the optical lens 102 in the embodiment can be determined as required, and various lens parameters in the optical lens 102 will be exemplarily listed in the form of a table below.

[0206] Table 13a lists part of the lens parameters of the optical lens 102 corresponding to the architecture 7 shown in FIGS. 21-23, wherein: the stop 105 can be located on the object side of the first lens group G1, the surface numbers are corresponded to the entrance and exit surfaces of the respective lenses (for example, the entrance surface of the lens L1 is surface 3, and the exit surface is surface 4, and so on), and BK7 SCHOTT represents a kind of glass material adopted by the filter 103.

[0207] Part of the lens parameters of the optical lens in the architecture 7 in Table 13a

[0208] Tables 13b and 13c show other lens parameters of each lens surface in Table 13a, including Y radius, normalized radius, and quadratic surface constant and 4-30 order aspherical coefficients of each lens surface in Table 13a.

[0209] Part of the lens parameters of the optical lens in the architecture 7 in Table 13a

[0210] Table 13c lists part of the lens parameters of the optical lens in the architecture 7 below. Table 14 lists various parameters of the optical lens 102 corresponding to the architecture 7.

[0211] Table 14 summarizes various parameters of the optical lens 102 in the architecture 7 (stop in front)

[0212] Exemplarily, the optical total length TTL1 of the optical lens 102 in the first working state and the optical total length TTL0 in the retracted state can satisfy the following relationship: 0.1≤(TTL1-TTL0) / TTL1≤0.3. TTL1-TTL0 is the total stroke TTLd2 of the optical lens 102 rising, or the zoom stroke. TTLd2 / TTL1 may, for example, be 0.1, 0.2, 0.3, etc. Exemplarily, as shown in Table 14, TTL1 can be 14.157 mm, TTL0 can be 10.700 mm, at this time the total stroke TTLd2 of the system pop-up is 3.457 mm, and the ratio of TTLd2 to TTL1 is 0.244.

[0213] TTLd2 in the comparative architecture 7 (aperture front) and TTLd2 in the architecture 1 (aperture middle) can be known, the aperture front scheme can reduce TTL compared with the aperture middle scheme, for example, can reduce about 1mm. For example, TTLd2 in the architecture 7 is 3.457mm, TTLd2 in the architecture 1 is 4.275mm, and TTL is reduced by 0.818.

[0214] In the case of the same variable ratio (i.e. optical zoom ratio), by limiting the range of the total travel TTLd2, the TTL in the two working states can be compressed, which is beneficial to reduce the thickness of the electronic device 1. By setting the total travel TTLd2 (i.e. zoom travel) in the above smaller range, it is beneficial to reduce the precision requirement of the zoom driving device (e.g. zoom motor) of the optical lens 102, and to ensure the driving reliability of the zoom driving device.

[0215] The above is only an example, and in fact, in the embodiments of the present application, for the aperture front architecture:

[0216] The range of TTL0 can be [7.0, 12.0], for example [8.0, 11.0], and TTL0 can be exemplarily 7.0, 10.7, 8.0, 9.3, 11.0, 12.0, etc.

[0217] The range of TTL1 can be [10.0, 16.0], for example [12.0, 15.0], and TTL1 can be exemplarily 10.36, 14.157, 15.036, etc.

[0218] The range of TTL2 can be [8.0, 15.0], for example [10.0, 14.0], and TTL2 can be exemplarily 8.026, 9.23, 10.134, 13.135, 14.126, etc.

[0219] The range of TTLd2 can be [1.0, 5.0], for example [3.0, 4.0], and TTLd2 can be exemplarily 1.0, 1.5, 3.457, 4.235, etc.

[0220] The range of TTLd2 / TTL1 can be (0.0, 0.5], for example [0.2, 0.3].

[0221] The range of TTLd2 / TTL2 can be (0.0, 0.5], for example [0.2, 0.4].

[0222] Exemplarily, the effective focal length EFL2 of the optical lens 102 in the second working state and the half image height ImgH of the optical lens 102 can satisfy the following relationship: 0.2≤EFL2 / ImgH≤1.0. For example, EFL2 / ImgH can be 0.2, 0.81, 1.0, etc. Exemplarily, EFL2 can be 7.098 mm, and ImgH can be 8.263 mm, so that EFL2 / ImgH is 0.859.

[0223] arctan(ImgH / EFL2)*2=FOV, thus by limiting the range of EFL2 / ImgH, the range of FOV can be limited; and limiting FOV in the range is beneficial to increase the zoom ratio.

[0224] Exemplarily, the effective focal length EFL1 of the optical lens 102 in the first working state and the effective focal length EFL2 in the second working state can satisfy the following relationship: 1<EFL1 / EFL2≤1.8. In an embodiment, EFL1 and EFL2 satisfy the relationship: 1<EFL1 / EFL2≤1.5. Exemplarily, EFL1 can be 8.878 mm, and EFL2 can be 7.098 mm, so that EFL1 / EFL2 is 1.252. By limiting EFL1 / EFL2 in the range as above, the optical lens 102 can have a larger zoom ratio, and can zoom in a wider focal length range, thereby meeting diversified shooting requirements.

[0225] Exemplarily, the most image-side lens in the optical lens 102 (for example, lens L9 in FIG. 3) can have a negative focal power. For example, lens L9 in FIG. 3 has a negative focal power. This design can correct the optical distortion of the optical lens 102 in the second working state.

[0226] Exemplarily, the focal length f1 of the most image-side lens (for example, lens L9 in FIG. 3) in the optical lens 102 and the effective focal length EFL1 of the optical lens 102 in the first working state can satisfy the following relationship: 0.1≤|f1 / EFL1|≤1.5. Exemplarily, f1 can be -9.637 mm, and EFL1 can be 8.878 mm, so that |f1 / EFL1| is 1.085. By limiting |f1 / EFL1| in the range as above, the optical distortion in the two working states can be balanced.

[0227] Exemplarily, the focal length f2 of the lens (e.g., lens L3 in FIGS. 3-5) in the optical lens 102 located on the light-exit side of the diaphragm 105 and adjacent to the diaphragm 105 can satisfy the following relationship with the effective focal length EFL1 of the optical lens 102 in the first working state: 0.5≤|f2 / EFL1|≤10. Exemplarily, f2 can be 16.711, and EFL1 can be 8.878, such that |f2 / EFL1| is 1.882. In another embodiment, f2 can be -46.046, and EFL1 can be 8.850, such that |f2 / EFL1| is 5.182. By limiting |f2 / EFL1| to be within the range as above, the relative illumination and imaging performance of the optical lens 102 in the first working state can be improved.

[0228] As shown in Table 14, the aperture value F1 of the optical lens 102 in the first working state can be smaller than the aperture value F2 in the second working state.

[0229] The above is merely an example. In fact, in the embodiments of the present application, for the front diaphragm architecture:

[0230] The effective focal length EFL1 of the optical lens 102 in the first working state can be in the range of [8.0, 10.0], for example, [8.0, 9.0], and exemplarily can be 8.878, etc.

[0231] The effective focal length EFL2 of the optical lens 102 in the second working state can be in the range of [5.0, 10.0], for example, [6.0, 8.0], and exemplarily can be 7.098, etc.

[0232] The range of EFL1 / EFL2 can be [1.0, 2.0], for example, [1.0, 1.5].

[0233] The range of the half image height ImgH can be [4.0, 10.0], for example, [6.0, 8.5].

[0234] The range of EFL2 / ImgH can be [0.5, 1.0], for example, [0.8, 1.0].

[0235] The range of f1 can be [-12.0, -1.0], for example, [-10.0, -3.0].

[0236] The range of |f1 / EFL1| can be (0.0, 2.0], for example, [0.3, 1.5].

[0237] The range of |f2 / EFL1| can be [1.0, 6.0], for example, [1.5, 5.5].

[0238] Based on the above embodiments, Figs. 24-26 illustrate another embodiment of optical lens 102 with a front-located aperture stop. In particular, Fig. 24 is a schematic view of the optical lens 102 in a collapsed state, Fig. 25 is a schematic view of the optical lens 102 in a first working state, and Fig. 26 is a schematic view of the optical lens 102 in a second working state.

[0239] Fig. 24 is a schematic view of the optical lens 102 in a collapsed state, Fig. 25 is a schematic view of the optical lens 102 in a first working state, and Fig. 26 is a schematic view of the optical lens 102 in a second working state.

[0240] Table 15a lists the partial lens parameters of the architecture 8 corresponding to the optical lens 102 in Figs. 24-26, where the aperture stop 105 can be located on the object side of the first lens group G1. The surface numbers are corresponded to the entrance and exit surfaces of each lens (e.g., the entrance surface of lens LI is surface 3 and the exit surface is surface 4, and so on). BK7 SCHOTT represents a glass material used for the filter 103.

[0241] Table 15a lists the partial lens parameters of the architecture 8 corresponding to the optical lens 102 in Figs. 24-26, where the aperture stop 105 can be located on the object side of the first lens group G1. The surface numbers are corresponded to the entrance and exit surfaces of each lens (e.g., the entrance surface of lens LI is surface 3 and the exit surface is surface 4, and so on). BK7 SCHOTT represents a glass material used for the filter 103.

[0242] Tables 15b and 15c illustrate other lens parameters of each lens surface in Table 15a, including the Y radius, the normalized radius, and the conic constant and the 4-30th order aspherical coefficients of each lens surface in Table 15a.

[0243] Table 15a lists the partial lens parameters of the architecture 8 corresponding to the optical lens 102 in Figs. 24-26, where the aperture stop 105 can be located on the object side of the first lens group G1. The surface numbers are corresponded to the entrance and exit surfaces of each lens (e.g., the entrance surface of lens LI is surface 3 and the exit surface is surface 4, and so on). BK7 SCHOTT represents a glass material used for the filter 103.

[0244] Table 15a lists the partial lens parameters of the architecture 8 corresponding to the optical lens 102 in Figs. 24-26, where the aperture stop 105 can be located on the object side of the first lens group G1. The surface numbers are corresponded to the entrance and exit surfaces of each lens (e.g., the entrance surface of lens LI is surface 3 and the exit surface is surface 4, and so on). BK7 SCHOTT represents a glass material used for the filter 103.

[0245] Table 16 below lists the parameters of the optical lens 102 corresponding to the architecture 8. The parameters listed in Table 16 can be adapted to the corresponding parameter ranges or relationships described for the architecture 7, which are not repeated here.

[0246] Table 16 lists the parameters of the optical lens 102 corresponding to the architecture 8. The parameters listed in Table 16 can be adapted to the corresponding parameter ranges or relationships described for the architecture 7, which are not repeated here.

[0247] The above example in which the optical lens 102 includes three lens groups is merely an example. In another embodiment, the optical lens 102 can also include a larger number of lens groups. For example, in an embodiment, the optical lens 102 can also include a fourth lens group G4, the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 are arranged in sequence along the direction from the object side to the image side of the optical lens 102. Among them, the first lens group G1 and the second lens group G2 can both be positive focal power, the focal power of the third lens group G3 is not limited, and the fourth lens group G4 can be negative focal power. In the process of switching from the retracted state to the first working state, the first lens group G1 moves towards the object side, the second lens group G2 moves towards the object side, the third lens group G3 moves towards the object side, and the fourth lens group G4 remains unchanged. In the process of switching from the first working state to the second working state, the first lens group G1 moves towards the image side, the second lens group G2 moves towards the object side, the third lens group G3 moves towards the object side, and the fourth lens group G4 remains unchanged. In the process of switching from the retracted state to the second working state, the first lens group G1 moves towards the object side, the second lens group G2 moves towards the object side, the third lens group G3 moves towards the object side, and the fourth lens group G4 remains unchanged. By increasing the number of lens groups, the design freedom of the optical architecture can be optimized, more imaging requirements can be met, and the TTL of the working state can be compressed.

[0248] For the convenience of understanding, the related technical terms involved in the embodiments of the present application are explained and described below.

[0249] In the description of the embodiments of the present application, "a plurality of" means two or more, unless otherwise specified.

[0250] The terms "first", "second", and the like are used only for descriptive purposes, and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of the indicated technical features. The features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0251] "Connection" should be understood broadly, for example, "connection" can be detachable connection, or non-detachable connection; can be direct connection, or indirect connection through intermediate medium. "Fixing" should also be understood broadly, for example, "fixing" can be direct fixing, or indirect fixing through intermediate medium.

[0252] The positional terms mentioned in the embodiments of the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "lateral", "top", "bottom", and the like, are only the directions of the accompanying drawings. The positional terms are for better and clearer illustration and understanding of the embodiments of the present application, and do not mean or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and the like, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0253] In the description of the embodiments of the present application, unless otherwise specified, "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships. For example, A and / or B can represent the three cases of A existing alone, A and B existing together, and B existing alone.

[0254] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An optical lens characterized in that, comprising a first lens group, a second lens group and a third lens group, the first lens group, the second lens group and the third lens group are arranged in order along a direction from an object side to an image side of the optical lens, the first lens group and the second lens group both have positive refractive power, the first lens group and the second lens group are both used to move along the optical axis to make the optical lens realize zooming, wherein: the optical lens has a first working state and a second working state, a field of view FOV1 of the optical lens in the first working state is less than a field of view FOV2 in the second working state; in the process of switching from the first working state to the second working state, the first lens group is used to move to the image side, and the second lens group is used to move to the object side.

2. The optical lens according to claim 1, characterized in that, the optical lens also has a shrinkage state, an overall optical length TTL0 of the optical lens in the shrinkage state is less than an overall optical length TTL2 in the second working state; in the process of switching from the shrinkage state to the first working state, the first lens group is used to move to the object side, and the second lens group is used to move to the object side.

3. The optical lens according to claim 2, characterized in that, an overall optical length TTL1 of the optical lens in the first working state and the overall optical length TTL0 satisfy the following relationship: 0.1≤TTL1 / TTL0≤0.

3.

4. The optical lens according to any one of claims 1-3, characterized in that, an effective focal length EFL2 of the optical lens in the second working state and a half image height ImgH of the optical lens satisfy the following relationship: 0.2≤EFL2 / ImgH≤1.

0.

5. The optical lens according to any one of claims 1-4, characterized in that, the field of view FOV1 ∈ [60°, 90°], and / or, the field of view FOV2 ∈ [90°, 150°].

6. The optical lens according to any one of claims 1-5, characterized in that, an effective focal length EFL1 of the optical lens in the first working state and an effective focal length EFL2 in the second working state satisfy the following relationship: 1<EFL1 / EFL2≤1.

8.

7. The optical lens according to any one of claims 1-6, characterized in that, a lens adjacent to the first lens group in the second lens group has positive refractive power.

8. The optical lens according to any one of claims 1-7, characterized in that, a lens closest to the image side in the optical lens has negative refractive power.

9. The optical lens according to any one of claims 1-8, characterized in that, a focal length f1 of a lens closest to the image side in the optical lens, and an effective focal length EFL1 of the optical lens in the first working state satisfy the following relationship: 0.1≤|f1 / EFL1|≤1.

5.

10. The optical lens according to any of claims 1-9, wherein: the number of lenses in the first lens group is at least two, and / or the number of lenses in the second lens group is at least one, and / or the number of lenses in the third lens group is at least one.

11. An image capturing module, comprising: an image sensor; and an optical lens according to any of claims 1-10, wherein the image sensor is located on an image side of the optical lens.

12. The image capturing module according to claim 11, wherein: the image capturing module is configured to be installed in an electronic device; and the image capturing module comprises a module cover configured to be located on an object side of the optical lens and to be received in an opening of the electronic device, and the module cover is configured to move along an optical axis of the optical lens.

13. The image capturing module according to claim 11 or 12, wherein: the image capturing module further comprises a diaphragm located on an object side of the first lens group, on an image side of the first lens group, or between lenses in the first lens group.

14. The image capturing module according to claim 13, wherein: a focal length f2 of a lens in the optical lens located on an exit side of the diaphragm and adjacent to the diaphragm satisfies the following relationship with an effective focal length EFL1 of the optical lens in the first working state: 0.5≤|f2 / EFL1|≤10.

15. An electronic device, comprising: a main body; and an image capturing module according to any of claims 11-14, wherein the image capturing module is installed in the main body.

16. The electronic device according to claim 15, wherein: the main body is provided with an opening; and the image capturing module comprises a module cover configured to be located on an object side of the optical lens and to cover the opening, and the module cover is configured to move along an optical axis of the optical lens. ​ ​ ​ ​ ​ ​ ​ ​ ​

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