Lens module and electronic device

Abstract

Provided in the present application are a lens module and an electronic device. The lens module comprises at least a first lens group, a second lens group, a first reflecting element and a photosensitive element. Light is incident through the first lens group, is reflected by the first reflecting element into the second lens group, passes through the second lens group, and is then projected onto the photosensitive element. The first lens group can move in a plane perpendicular to the optical axis of the first lens group, thereby achieving an image stabilization function of the lens module. The second lens group can move close to or far away from the first reflecting element in a first direction, thereby adjusting the focal length and the image distance of the lens module, which extends the adjustment range of the image distance of the lens module, and helps the lens module and the electronic device to clearly shoot objects that are farther away and closer, that is, a long-focus shooting function and a micro shooting function are achieved; and on this basis, the image stabilization function of the first lens group is also beneficial for an improvement in the imaging quality of the lens module to a certain extent.

Description

Lens modules and electronic devices

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on November 30, 2023, with application number 202311632438.7 and invention name “Lens module and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of terminal device hardware, and specifically, to a lens module and an electronic device. Background Art

[0003] The size and weight of portable electronic devices, such as mobile phones and tablets, are significant factors affecting their portability and operability. To enhance the user's photography experience, more and larger lens modules are being installed within limited electronic devices. This, to a certain extent, limits the thinness and lightness of these devices. Therefore, it is important to consider how to implement more shooting functions within the same lens module, improve the imaging quality of a single lens module, and, on this basis, minimize the size of the lens module and reduce the internal space occupied by the lens module within the electronic device.

[0004] Summary of the Invention

[0005] The present application provides a lens module, which includes at least two lens groups, wherein one lens group close to the object to be photographed can move in a plane perpendicular to its optical axis, thereby adjusting the position of the incident point of the incident light on the lens module, thereby realizing the anti-shake function of the lens module; the other lens group close to the photosensitive element can move closer to or away from the photosensitive element along the optical axis. During the movement of the lens group, the focal length and distance of the lens module will change accordingly, so that the object distance of the lens module has a wider adjustment range, and the lens module can clearly capture both distant objects and nearby objects.

[0006] In the first aspect, a lens module is provided, comprising: a first lens group, a first reflecting element, a second lens group and a photosensitive element, wherein the first lens group comprises one or more lenses, the first lens group is fixed at a distance from the first reflecting element in a first direction, the first direction being the axial direction of the first lens group, the first lens group is configured to be movable in a first plane, the first plane being perpendicular to the first direction; the second lens group comprises one or more lenses, the second lens group is configured to be able to approach or move away from the first reflecting element along a second direction, the second direction being the axial direction of the second lens group; the first reflecting element is fixed relative to the photosensitive element; wherein the incident light passes through the first lens group and is incident on the first reflecting element, is reflected by the first reflecting element and is incident on the second lens group, and passes through the second lens group and is incident on the photosensitive element.

[0007] In some scenarios, the relative positional relationship between the first lens group, the first reflective element, and the second lens group can also be understood as the first lens group and the second lens group being distributed on both sides of the normal to the reflective surface of the first reflective element.

[0008] The second lens group is configured to be able to move closer to or farther away from the first reflective element along the second direction. It can also be understood that the second lens group is configured to be able to move away from or closer to the photosensitive element along the second direction.

[0009] In some scenarios, this technical solution can be understood as that the first plane is parallel to the focal plane of the first lens group.

[0010] The first lens group can move within the first plane, which can be understood as the first lens group being able to adjust the position of the incident point of the incident light on the first lens group. In other words, the lens head module can have an anti-shake function. Compared with the lens module that uses an image sensor to realize the anti-shake function of the lens module, the lens module provided by this technical solution can have more space between the first reflective element and the photosensitive element to accommodate the second lens group for focusing. The number of lenses included in the second lens group, the thickness of the lenses, the spacing between the lenses, etc. have greater adjustment space. The implementation of this technical solution is conducive to enhancing the adjustment ability of the second lens group for imaging light, which is conducive to improving the imaging quality of the lens module. In addition, since the first reflective element and the photosensitive element are provided with fewer components, this technical solution is also conducive to reducing the volume of the lens module to a certain extent.

[0011] As the second lens group approaches or moves away from the first reflective element, the distance between the second lens group and the first lens group also changes accordingly. In other words, if the first lens group and the second lens group are regarded as a whole, the overall focal length of the two lens groups will change with the movement of the second lens group. In addition, the distance between the lens modules will also change during the movement of the second lens group. The simultaneous change of focal length and distance is conducive to expanding the range of variation of object distance, thereby helping the lens module to clearly capture farther and closer objects.

[0012] In addition, compared with the solution of using the movement of the first lens group to achieve the focusing function, the lens module provided by this technical solution is smaller in size in the direction of incident light, or in other words, the thickness of the lens module is thinner. When the lens module is installed on an electronic device, it is beneficial to reduce the size of the electronic device in the thickness direction.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the lens module further includes a first platform, the first lens group is fixedly connected to the first platform, and the first platform is used to drive the first lens group to move within the first plane.

[0014] Fixing the lens group on a mobile platform and driving the movement of the lens group by the movement of the platform is beneficial to improving the stability of the lens group movement process and the reliability of the anti-shake performance of the lens module.

[0015] In conjunction with the first aspect, in certain implementations of the first aspect, the focal length of the first lens group is G1, the maximum travel of the first lens group in the first plane is 2×Ld, and G1 and Ld satisfy:

[0016] In some scenarios, the maximum travel of the first lens group can be understood as the distance between the two points that are farthest apart during the movement of the first lens group in the first plane. Here, the maximum travel of the first lens group can be understood as twice the anti-shake travel of the first lens group.

[0017] The larger the maximum stroke of the first lens group, the stronger the anti-shake performance of the lens module. The maximum stroke of the first lens group provided by this technical solution can meet the requirements for the anti-shake performance of the lens module during shooting.

[0018] In combination with the first aspect, in certain implementations of the first aspect, the lens module further includes a second platform, the second lens group is fixedly connected to the second platform, and the second platform is used to drive the second lens group to approach or move away from the first reflective element along the second direction.

[0019] In a possible implementation, the first platform may be an electromagnetic drive platform, such as a voice coil motor.

[0020] Fixing the lens group on a mobile platform and driving the movement of the lens group by the movement of the platform is beneficial to improving the stability of the lens group movement process and the reliability of the lens module shooting performance.

[0021] In conjunction with the first aspect, in certain implementations of the first aspect, the total track length of the lens module is Lt, the maximum travel of the second lens group in the second direction is Mv, and Lt and Mv satisfy:

[0022] The larger the maximum stroke of the second lens group, the greater the adjustable range of the lens module's focal length, focal length, and object distance. However, a larger stroke often requires a larger storage space. The maximum stroke of the second lens group provided by this technical solution helps to balance good shooting performance of the lens module with a small lens module size.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the first lens group has positive optical power.

[0024] The positive focal power of the first lens group means that the size of the image of the object after being imaged by the first lens group is smaller than the size of the object. In other words, the incident light enters the lens module and is first converged before being imaged. In this way, more incident light can eventually be projected onto the photosensitive element, or in other words, more information about the photographed object can be captured by the lens module. The implementation of this technical solution is conducive to improving the imaging quality of the lens module.

[0025] In combination with the first aspect, in certain implementations of the first aspect, the optical axis of the first lens group is perpendicular to the optical axis of the second lens group.

[0026] In this technical solution, incident light horizontally incident on the first lens group will be vertically incident on the second lens group and then projected onto the photosensitive element. Implementation of this technical solution facilitates a more rational arrangement of other optical components within the lens module, and helps improve the utilization efficiency of the lens module's internal space.

[0027] In combination with the first aspect, in certain implementations of the first aspect, the lens module also includes a third lens group, the third lens group includes one or more lenses, the third lens group is located on the side of the second lens group close to the first reflective element, and the third lens group is relatively fixed to the first reflective element.

[0028] In combination with the first aspect, in certain implementations of the first aspect, the lens module also includes a fourth lens group, the fourth lens group includes one or more lenses, the fourth lens group is located on the side of the second lens group away from the first reflective element, and the fourth lens group is relatively fixed to the first reflective element.

[0029] The provision of the third lens group and / or the fourth lens group increases the adjustable dimensions such as the propagation path and optical distance of the light incident into the lens module, which is beneficial to making the imaging of the lens module on the photosensitive element clearer and improving the imaging quality.

[0030] In combination with the first aspect, in certain implementations of the first aspect, the lens module further includes a second reflective element, the second reflective element is located on a side of the second lens group away from the first reflective element, and the second reflective element is arranged close to the photosensitive element.

[0031] The provision of the second reflective element can make the position of the photosensitive element in the lens module more flexible, which is more conducive to improving the utilization rate of the space occupied by the lens module and, to a certain extent, helping to reduce the space occupied by the lens module in the optical axis direction of the second lens group.

[0032] In a second aspect, an electronic device is provided, which includes a middle frame and the lens module according to the first aspect and any possible implementation thereof, wherein the lens module is fixedly connected to the middle frame.

[0033] Compared with the solution of using the first lens group to move to achieve the focusing function, the lens module provided by this technical solution is smaller in size in the direction of incident light, or in other words, the thickness of the lens module is thinner, and the electronic device installed with the lens module is smaller in size in the thickness direction, or in other words, the electronic device is thinner. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is a schematic diagram of an electronic device provided in an embodiment of the present application.

[0035] FIG2 is a schematic diagram of a lens module provided in an embodiment of the present application.

[0036] FIG3 is a schematic diagram of another lens module provided in an embodiment of the present application.

[0037] FIG4 is a schematic diagram of several lens forms provided in an embodiment of the present application.

[0038] FIG5 is a schematic diagram of another lens module provided in an embodiment of the present application.

[0039] FIG6 is a schematic diagram of another lens module provided in an embodiment of the present application.

[0040] FIG7 is a schematic diagram of another lens module provided in an embodiment of the present application.

[0041] FIG8 is a schematic diagram of another lens module provided in an embodiment of the present application.

[0042] FIG9 is a schematic diagram of another lens module provided in an embodiment of the present application.

[0043] FIG10 is a schematic diagram of an imaging process of a lens module provided in an embodiment of the present application.

[0044] FIG11 is a schematic diagram of another lens module imaging process provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following describes embodiments of the present application in detail, and examples of the embodiments of the present application are shown in the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present application and are not to be construed as limiting the present application.

[0046] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meanings understood by persons having ordinary skills in the technical field to which this application belongs. In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting this application.

[0047] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0048] Before formally introducing the embodiments of the present application, the terms that may be used in the following content are first explained.

[0049] F-number / aperture, or F# or F-number, is a relative value calculated by dividing the focal length of a lens by the diameter of the lens through which light passes (the inverse of the aperture). The smaller the F-number, the more light enters the image per unit time. A larger F-number reduces the depth of field, blurring the background in the photo. This creates an effect similar to a telephoto lens.

[0050] Aperture refers to an entity that limits the light beam in an optical system. It can be the edge of a lens, a frame, or a specially designed barrier with holes.

[0051] Focal length or focal length is the distance from the center of the lens to the focus where light is focused. For a rear lens or a system consisting of multiple lenses or mirrors, the focal length is usually expressed as the effective focal length (EFL).

[0052] Total track length (TTL) generally refers to the distance from the image sensor surface to the top of the lens. TTL is the main factor in determining the height of the lens module.

[0053] Image height (IH), radius of the imaging circle, half image height.

[0054] The field of view (FOV), also known as visual field or field of view, is the extent of the observable world visible to the eye or device at any given moment. In optical instruments, the angle between the two edges of the maximum range through which the image of the object can pass through the lens, with the lens as the vertex, is called the field of view.

[0055] The image circle (IC) is the cross-section of the cone of light formed by a lens or series of lenses when it is transmitted to the image plane. For systems with adjustable image circles, the maximum image circle (MIC) is the image circle with the largest diameter.

[0056] Back focal length (BFL) is the distance between the vertex of the last optical surface in an optical system and the rear focal point.

[0057] Modulation transfer function (MTF), modulation contrast, an evaluation measure of system imaging quality.

[0058] The principal ray is the ray that passes through the center of the system's entrance and exit pupils.

[0059] Chief ray angle (CRA): The angle of incidence of the chief ray on the image plane.

[0060] Positive power: The lens or lens group has a positive focal length and has the effect of focusing light.

[0061] Negative optical power: The lens or lens group has a negative focal length and has the effect of diverging light.

[0062] Focusing distance: The distance between the subject and the image plane. The minimum focusing distance refers to the shortest distance at which a lens can focus on a subject. If the distance between the subject's focal plane and the lens module's focal plane is less than the minimum focusing distance, the lens will not focus. If the distance between the subject's focal plane and the lens module's focal plane is greater than or equal to the minimum focusing distance, the lens will focus.

[0063] A photosensitive element, or image sensor, is a device that converts optical images into electronic signals. It is widely used in digital cameras and other electro-optical devices. Early image sensors used analog signals, such as video camera tubes. Today, image sensors are primarily categorized into charge-coupled devices (CCDs) and complementary metal-oxide semiconductor (CMOS) active pixel sensors.

[0064] Infrared cutoff filters, also known as infrared filters or heat-absorbing filters, are filters used to filter infrared wavelengths. For example, when used on devices with incandescent lamps (such as slides and projectors), they can prevent unnecessary heat from burning the lens. When used on cameras with solid-state electronic devices (CCD or CMOS), they can prevent infrared rays from passing through the camera lens and causing image distortion.

[0065] The Abbe number measures the degree of light dispersion in a medium. Originally used to characterize the properties of optical glass, it is also applicable to other transparent materials, such as polyester resin and polycarbonate, commonly used in eyeglass lenses.

[0066] The refractive index is the ratio of the speed of light in a vacuum (the speed of light) to its phase velocity upon entering a medium. The refractive index determines the degree to which the path of light is bent, or refracted, upon entering a material.

[0067] Telephoto shooting and macro shooting are two shooting modes that are used most frequently by electronic devices or camera devices such as cameras. In order to make the objects photographed in the telephoto shooting state (hereinafter referred to as the first shooting state or telephoto shooting mode) clear enough, the lens module needs to have a longer object distance, and in order to make the objects photographed in the macro shooting state (hereinafter referred to as the second shooting state or macro shooting mode) clear enough, the lens module needs a shorter minimum focusing distance. Thinning and lightening is a development direction of portable electronic devices, such as mobile phones. The volume of the lens module is often an important factor that restricts the size factors such as the volume and thickness of the electronic device. In order to realize the functions of telephoto shooting and macro shooting at the same time on the basis of reducing the volume of the lens module, the embodiment of the present application provides a lens module and an electronic device, which are now introduced as follows.

[0068] As shown in FIG1 , an electronic device 1000 provided in an embodiment of the present application may include a front camera module 1100 and / or a rear camera module 1200. The lens module provided in the present application may be applied to both the front camera module 1100 and the rear camera module 1200. In some examples, the electronic device 1000 includes a middle frame, and the front camera module 1100 and / or the rear camera module 1200 may be fixedly connected to the middle frame, thereby being installed in the electronic device 1000.

[0069] FIG2 shows a first lens module 2000 provided in an embodiment of the present application. The first lens module 2000 may be the aforementioned front camera module 1100 or rear camera module 1200. The first lens module 2000 may include multiple lens groups and at least one reflective element. One of the multiple lens groups may implement an anti-shake function for the first lens module 2000, and another lens group may implement a focusing function for the first lens module 2000. The at least one reflective element may be used to adjust the propagation path of light within the first lens module 2000.

[0070] In some examples, the first lens module 2000 may include a first lens group 100, a second lens group 300, a first reflective element 200, and a photosensitive element 400. Light incident on the first lens module 2000 passes through the first lens group 100 and is incident on the first reflective element 200. After being reflected by the first reflective element 200, it is incident on the second lens group 300, passes through the second lens group 300, and is projected onto the photosensitive element 400.

[0071] In some examples, the first lens module 2000 further includes an infrared cutoff filter 500, which is located between the second lens group 300 and the photosensitive element 400 and is disposed close to the photosensitive element 400. Light emitted by the second lens group 300 is filtered by the infrared cutoff filter 500 and then projected onto the photosensitive element 400.

[0072] In some examples, the first lens module 2000 further includes an aperture, which can be disposed on a side of the first lens group 100 away from the first reflective element 200 , and the aperture can be used to adjust the size of the light beam incident on the first lens group 100 .

[0073] As shown in FIG. 2 , the first reflective element 200 may be located between the first lens group 100 and the second lens group 300 , and the second lens group 300 may be located between the first reflective element 200 and the photosensitive element 400 .

[0074] In some examples, the second lens group 300 can be moved closer to or farther away from the first reflective element 200 along the first direction 2001 , or in other words, the second lens group 300 can be moved closer to or farther away from the photosensitive element 400 along the first direction 2001 .

[0075] Exemplarily, the first direction 2001 may be the second axial direction O2O2 of the second lens group 300 . In some scenarios, the first direction 2001 may also be referred to as the second axial direction O2O2 .

[0076] By way of example but not limitation, the first lens module 2000 may include a first platform (not shown in the figure), the second lens group 300 may be fixedly connected to the first platform, and the first platform may be a movable platform, which may be used to drive the second lens group 300 along the aforementioned first direction 2001 toward or away from the first reflective element 200.

[0077] There should be a certain moving distance or movable space between the first reflective element 200 and the photosensitive element 400 so that the second lens group 300 can move along the first direction 2001 in the movable space.

[0078] If the first lens group 100 and the second lens group 300 are regarded as a whole, when the second lens group 300 moves along the first direction 2001, the overall focal length of the first lens group 100 and the second lens group 300 will change, and the overall distance between the first lens group 100 and the second lens group 300 will also change. The focal length, object distance and phase distance satisfy the imaging relationship. Therefore, the changes in focal length and phase distance provide adjustment space for the object distance of the first lens module 2000. In other words, the object distance of the first lens module 2000 has a wider adjustment range.

[0079] Compared with the solution of using the movement of the first lens group to achieve the focusing function, the lens module provided by this technical solution is smaller in size in the direction of incident light, or in other words, the thickness of the lens module is thinner. When the lens module is installed on an electronic device, it is beneficial to reduce the size of the electronic device in the thickness direction.

[0080] The greater the travel of the second lens group 300 along the first direction 2001, the wider the adjustable range of the focal length, object distance, and phase distance of the first lens module 2000. The wider the adjustable range of the object distance, the wider the range of distances at which the first lens module 2000 can clearly capture objects, from far to near. In other words, the first lens module 2000 can clearly capture objects farther away and closer.

[0081] In some examples, the maximum travel of the second lens group 300 along the first direction 2001 is Mv, and the total track length of the first lens module 2000 is Lt. Lt and Mv can satisfy: For example, Mv may be 0.05Lt, 0.1Lt, 0.2Lt or 0.3Lt, etc.

[0082] In some examples, the magnification of the lens module in the second shooting state is β, 0.1≤β≤0.5.

[0083] In some examples, the first lens group 100 is configured to move in a first plane 2002 . For example, the first plane 2002 may be perpendicular to the first axis O1O1 of the first lens group 100 . In other words, the first plane 2002 is parallel to the focal plane of the first lens group 100 .

[0084] Exemplarily, the first lens module 2000 may include a second platform (not shown in the figure), the first lens group 100 may be fixedly connected to the second platform, and the second platform may be a movable platform that can be used to drive the first lens group 100 to move within the first plane 2002.

[0085] The first lens group 100 can move from an initial position (or displacement zero point) to other positions within the first plane 2002. If the distance between the farthest point the first lens group 100 can move within the first plane 2002 and the initial position is denoted as Ld, the maximum travel of the first lens group 100 within the first plane 2002 can be denoted as 2×Ld. The greater the maximum travel of the first lens group 100, the wider the range over which the position of the incident point of light on the first lens group 100 can be adjusted. Consequently, the first lens module 2000 has stronger anti-shake performance.

[0086] In some examples, the focal length of the first lens group 100 can be denoted as G1, and G1 and Ld can satisfy: For example, G1 may be 60Ld, 80Ld, 100Ld or 120Ld, etc.

[0087] In some examples, the anti-shake angle in the anti-shake characteristic of the lens module is γ, and 0.5°<γ<3.0°.

[0088] In some examples, the first lens group 100 has positive optical power, or in other words, after the incident light enters the first lens group 100 and exits, the exiting light is more convergent than the incident light.

[0089] The first lens group 100 may include one or more lenses. The adjustment of the incident light by the first lens group 100 may be determined according to a composite result of the adjustments made by the one or more lenses to the incident light.

[0090] For a single lens, the properties of the lens's two surfaces, its thickness, and its material jointly determine the path and optical length of incident light within the lens. Surface properties can include surface type, radius of curvature (or degree of surface concavity), and so on. Different lens materials correspond to different light refractive indices. By adjusting the lens material and thickness, the deflection of incident light perpendicular to the optical axis can be adjusted, thereby adjusting the position of the light's exit point on the lens.

[0091] For a lens group comprising multiple lenses, the adjustment effect of the lens group on the incident light is also related to the distance between two adjacent lenses in the multiple lenses.

[0092] Therefore, by adjusting one or more of the first lens group 100 and / or the second lens group 300, the propagation path and / or propagation optical distance of the incident light in the first lens module 2000 can be adjusted, thereby adjusting the final imaging effect of the first lens module 2000.

[0093] The number of lenses in a lens set, including the spacing between two adjacent lenses in a lens set with multiple lenses, the thickness of each lens in the lens set, the surface properties of each lens in the lens set, or the material of each lens in the lens set.

[0094] In some examples, the lens module further includes a third lens group, the third lens group includes one or more lenses, the third lens group is located on a side of the second lens group close to the first reflective element, and the third lens group is fixed relative to the first reflective element.

[0095] In some examples, the lens module further includes a fourth lens group, the fourth lens group includes one or more lenses, the fourth lens group is located on a side of the second lens group away from the first reflective element, and the fourth lens group is fixed relative to the first reflective element.

[0096] The provision of the third lens group and / or the fourth lens group increases the adjustable dimensions such as the propagation path and optical distance of the light incident into the lens module, which is beneficial to making the imaging of the lens module on the photosensitive element clearer and improving the imaging quality.

[0097] In some examples, the lens module further includes a second reflective element, which is located on a side of the second lens group away from the first reflective element, and the second reflective element is disposed close to the photosensitive element.

[0098] The provision of the second reflective element can make the position of the photosensitive element in the lens module more flexible, which is more conducive to improving the utilization rate of the space occupied by the lens module and, to a certain extent, helping to reduce the space occupied by the lens module in the optical axis direction of the second lens group.

[0099] FIG3 shows a second lens module 3000 provided in an embodiment of the present application. The second lens module 3000 may include the first lens group 100, the first reflective element 200, the second lens group 300, and the photosensitive element 400 of the aforementioned first lens module 2000. Light passes through the first lens group 100 and is incident on the surface of the first reflective element 200. After being reflected by the first reflective element 200, it is incident on the second lens group 300. After passing through the second lens group 300, it is projected onto the photosensitive element 400.

[0100] In some examples, the second lens module 3000 may further include an infrared cutoff filter 500. The infrared cutoff filter 500 is located between the second lens group 300 and the photosensitive element 400, and is positioned near the photosensitive element 400. Light emitted by the second lens group 300 is filtered by the infrared cutoff filter 500 before entering the photosensitive element 400. The provision of the infrared cutoff filter 500 helps prevent infrared rays in the incident light from entering the photosensitive element 400, thereby improving the imaging quality of the second lens module 3000.

[0101] In some examples, the second lens module 3000 further includes an aperture, which can be disposed on a side of the first lens group 100 away from the first reflective element 200 , and the aperture can be used to adjust the size of the light beam incident on the first lens group 100 .

[0102] In some examples, the first optical axis O1O1 of the first lens group 100 may be inclined relative to the reflective surface RP1 of the first reflective element 200, and the second optical axis O2O2 of the second lens group 300 may be inclined relative to the reflective surface RP1 of the first reflective element 200. Light emitted from the first lens group 100 may be incident on the second lens group 300 after being reflected by the first reflective element 200. For example, the first optical axis O1O1 of the first lens group 100 and the second optical axis O2O2 of the second lens group 300 may be perpendicular to each other.

[0103] In some examples, the first reflective element 200 may be one or more of a plane reflector, a right-angle prism reflector, an off-axis parabolic reflector, a hollow roof prism reflector, etc. For example, the first reflective element 200 may be a right-angle prism reflector.

[0104] The shape and size of the first reflective element 200, the distance between the first reflective element 200 and the first lens group 100, and the distance between the first reflective element 200 and the second lens group 300 can all affect the propagation path of the incident light in the second lens module 3000, thereby affecting the imaging quality of the lens module.

[0105] Taking the first reflective element 200 as a diameter prism reflective element as an example, the thickness of the first reflective element 200 can be recorded as hr1, and hr1 can satisfy: 1.00mm≤hr1≤10.00mm. For example, hr1 can be 3.00mm, 5.00mm, 6.00mm, 6.50mm, 7.00mm, 8.00mm or 9.00mm, etc.

[0106] Taking the first reflective element 200 as a diameter prism reflective element as an example, the distance between the first reflective element 200 and the first lens group 100 and the distance between the first reflective element 200 and the second lens group 300 can be denoted as Dr1 and Dr2 respectively.

[0107] In some examples, Dr1 may satisfy: 0.01 mm≤Dr1≤3.0 mm. For example, Dr1 may be 0.02 mm, 0.03 mm, 0.60 mm, 0.09 mm, 0.12 mm, 0.50 mm, 1.20 mm, 1.80 mm, or 2.40 mm.

[0108] In some examples, Dr2 may satisfy: 1.0 mm ≤ Dr2 ≤ 4.0 mm. For example, Dr2 may be 1.50 mm, 1.80 mm, 2.10 mm, 2.40 mm, 3.20 mm, 3.60 mm, or 3.80 mm.

[0109] The propagation path of light in the lens module is adjusted by the reflective element. When the lens module is installed in an electronic device with limited storage space, the provision of the reflective element is conducive to the reasonable arrangement of the positions of components such as the lens group in the lens module, which is conducive to improving the space utilization efficiency inside the electronic device.

[0110] In some examples, the first lens group 100 can move within an anti-shake plane, or in other words, one or more lenses in the first lens group 100 can move within the anti-shake plane, and the anti-shake plane can be perpendicular to the first optical axis O1O1 of the first lens group 100. Taking the coordinate axes shown in FIG3 as an example, the first optical axis O1O1 is parallel to the x-axis, and one or more lenses in the first lens group 100 can move within the yz plane, or in other words, the anti-shake plane is the yz plane.

[0111] In some examples, the second lens module 3000 further includes a first drive platform, to which the lenses of the first lens group 100 can be fixedly connected (e.g., mounted on the first drive platform), and the first drive platform can drive the first lens group 100 to move within the aforementioned drive plane during movement. For example, the first drive platform can include a voice coil motor (VCM). When the magnitude of the current input to the VCM changes, the movement distance of the first drive platform or the first lens group 100 in the movement direction can be adjusted accordingly, thereby achieving an anti-shake function.

[0112] In some examples, the first lens group 100 may have positive power, or in other words, after light is incident on the first lens group 100, the outgoing light is more convergent than the incident light. The number of lenses included in the first lens group 100 may be one or more.

[0113] In the case that the first lens group 100 includes only one lens, the lens has positive optical power, and the optical axis of the lens is the first optical axis O1O1 of the first lens group 100 .

[0114] When the first lens assembly 100 includes multiple lenses, the lenses share the same first optical axis O1O1. The lenses can be arranged along the first optical axis O1O1. When incident light passes through the lenses, the outgoing light becomes more convergent relative to the incident light. In other words, if the lenses are considered as a whole, the lenses as a whole possess positive optical power.

[0115] Compared to having only one lens in the first lens group 100, including a larger number of lenses in the first lens group 100 is beneficial for increasing the dimensionality of the first lens group 100 in adjusting the incident light, improving the modulation effect of the first lens group 100 on the incident light, and improving the imaging quality of the lens module. However, a larger number of lenses will increase the volume of the first lens group 100 to a certain extent, increasing the space occupied by the lens module.

[0116] In some examples, the first lens group 100 may include two coaxial lenses, and the first lens group 100 can adjust the incident light by adjusting the distance between the two lenses and the properties of each of the two lenses.

[0117] In the case where the first lens group 100 includes multiple lenses, each of the multiple lenses may have a different effect on converging or diverging light.

[0118] 3 , the first lens group 100 may include a first lens 110 and a second lens 120. The first lens 110 may have positive power, and the second lens 120 may have negative power. The first lens 110 may be positioned away from the first reflective element 200, and the second lens 120 may be positioned close to the first reflective element 200.

[0119] Similarly, by way of example, the first lens group 100 may include a first lens, a second lens, and a third lens. The first lens may have positive optical power, the second lens may have negative optical power, and the third lens may have positive or negative optical power. Here, the first lens, the second lens, and the third lens are sequentially arranged along the first optical axis O1O1 in a direction approaching the first reflective element 200.

[0120] The ability of a lens to converge or diverge light is related to the surface shape, thickness and material of the lens.

[0121] In some examples, the surface shape of one or more lenses in the first lens group 100 can be spherical or aspherical.

[0122] For example, in the case where the first lens group 100 includes a first lens 110 and a second lens 120, both surfaces of the first lens 110 and the second lens 120 may be spherical or aspherical, or one of the two surfaces may be spherical and the other aspherical. For example, both surfaces of the first lens 110 and the second lens 120 may be aspherical.

[0123] Also illustratively, in the case where the first lens group 100 includes more than two lenses, the two opposite surfaces of each lens can be spherical or aspherical, and this application does not impose any limitation on this.

[0124] In some examples, for an aspherical lens, its surface can be determined according to the following formula:

[0125] Wherein, parameter c = 1 / R, i.e., the curvature corresponding to the radius; r is the distance from a point on the optical surface to the optical axis; z represents the sagittal height of the point along the optical axis; k is the quadratic surface coefficient of the surface, I is the aspheric coefficient term, and for example, I can be 30; A I is the aspheric coefficient.

[0126] By varying the concavo-convexity of the lens surfaces, the divergence or convergence of the lens on the same beam of light can be altered. FIG4 illustrates lenses with varying surface properties provided by embodiments of the present application. The concavo-convexity of the lenses in the first lens assembly 100 can be specifically designed based on the performance of the first lens assembly 100, and this application does not impose any restrictions thereon.

[0127] In Figure 4 , lenses 41, 42, and 43 all have positive optical power, while lenses 44, 45, 46, and 47 all have negative optical power. Curves with the opening facing the positive x-axis are considered positive curvature, while those with the opening facing the negative x-axis are considered negative curvature. Lens 41 has positive curvature on both sides, lens 42 has a positive curvature on its left side and a negative curvature on its right side, and lens 43 has negative curvature on both sides. Lenses 44 and 46 have positive curvature on both sides, lens 45 has negative curvature on both sides, and lens 47 has a negative curvature on its left side and a positive curvature on its right side.

[0128] In other words, for a lens with positive optical power, the surfaces on both sides can be either positively curved or negatively curved, or one side can be positively curved and the other side can be negatively curved. Similarly, for a lens with negative optical power, the surfaces on both sides can be either positively curved or negatively curved, or one side can be positively curved and the other side can be negatively curved.

[0129] FIG4 merely exemplarily provides some types of lenses applicable to the first lens group 100 . It should be understood that there are many more types of lenses applicable to the first lens group 100 , and this embodiment of the present application does not limit this.

[0130] By adjusting the radius of curvature of the lens surfaces, the divergence or convergence of the lens on incident light can be changed. The radius of curvature of the lenses in the first lens assembly 100 can be specifically designed based on the performance of the first lens assembly 100, and this application does not impose any restrictions on this.

[0131] In some examples, referring to Figure 3, taking the case where the first lens group 100 includes the first lens 110 and the second lens 120 as an example, the four surfaces from the side away from the first reflective element 200 to the side close to the first reflective element 200 can be respectively referred to as the first surface SF1, the second surface SF2, the third surface SF3 and the fourth surface SF4.

[0132] For example, the curvature radii of the first surface SF1 , the second surface SF2 , the third surface SF3 , and the fourth surface SF4 may be approximately 9 mm, 90 mm, 15 mm, and 8 mm, respectively.

[0133] For example, the curvature radii of the first surface SF1 , the second surface SF2 , the third surface SF3 and the fourth surface SF4 may be approximately 11 mm, 1600 mm, 21 mm and 10 mm, respectively.

[0134] For example, the curvature radii of the first surface SF1, the second surface SF2, the third surface SF3 and the fourth surface SF4 may be approximately -22 mm, -9 mm, -10 mm and -11 mm, respectively, where a negative value of the curvature radius indicates that the surface has a negative curvature.

[0135] For example, the curvature radii of the first surface SF1, the second surface SF2, the third surface SF3 and the fourth surface SF4 may be approximately 15 mm, -100 mm, 33 mm and 13 mm, respectively, where a negative value of the curvature radius indicates that the surface is a negative curvature surface.

[0136] By adjusting the thickness of the lenses, the offset distance of the incident light in the direction perpendicular to the optical axis can be changed, thereby changing the position of the incident light's exit point on the lenses, and further adjusting the light's propagation path in the first lens assembly 100. The thickness of the lenses in the first lens assembly 100 can be specifically designed based on the performance of the first lens assembly 100, and this application does not impose any restrictions on this.

[0137] Take the aforementioned first lens group 100 including the first lens 110 and the second lens 120 as an example.

[0138] For example, the thickness of the first lens 110 is denoted as h1, and h1 may satisfy the following relationship: 1.0 mm ≤ h2 ≤ 4.0 mm. For example, h1 may be 1.50 mm, 2.00 mm, 2.50 mm, or 3.00 mm. The thickness of the second lens 120 is denoted as h2, and h2 may satisfy the following relationship: 0.1 mm ≤ h2 ≤ 0.6 mm. For example, h2 may be 0.20 mm, 0.25 mm, 0.30 mm, 0.45 mm, or 0.55 mm.

[0139] For a lens assembly containing multiple lenses, the ability of the lens assembly as a whole to diverge or converge incident light depends not only on the properties of each lens in the lens assembly (such as the lens's surface shape, radius of curvature, etc.), but also on the arrangement of the multiple lenses in the lens assembly. Specifically, for a lens assembly in which multiple lenses are arranged along the optical axis, the ability of the lens assembly as a whole to diverge or converge incident light depends on the distance between two adjacent lenses. By adjusting the spacing between two adjacent lenses, the focal length of the lens assembly as a whole can be adjusted to a certain extent. In addition, by adjusting the distance between the lenses on both sides of the lens assembly, the propagation path of the incident light within the lens assembly can be affected to a certain extent, affecting the position of the exit point of the incident light after passing through the lens assembly.

[0140] Take the aforementioned first lens group 100 including the first lens 110 and the second lens 120 as an example.

[0141] Exemplarily, the distance between the first lens 110 and the second lens 120 is recorded as D1, and D1 may satisfy: 0.01mm≤D1≤2.00mm. Exemplarily, D1 may be 0.03mm, 0.06mm, 0.10mm, 1.00mm, 1.50mm, etc.

[0142] Changing the lens material can change the lens's refractive index for light, resulting in a difference in the angle of refraction of incident light within the lens. Therefore, changing the lens material can, to a certain extent, adjust the propagation path of incident light within the lens. The material or refractive index of the lenses in the first lens assembly 100 can be specifically designed based on the performance of the first lens assembly 100, and this application does not impose any restrictions on this.

[0143] In some examples, the first lens group 100 includes multiple lenses, and the multiple lenses can be made of glass or plastic, such as polymethyl methacrylate, polycarbonate, or cycloolefin polymer.

[0144] By selecting lens materials with different refractive indices and Abbe numbers, factors such as the propagation path of the incident light in the lens can be adjusted, thereby affecting the imaging effect of the lens module.

[0145] In some examples, the refractive index of one or more lenses included in the first lens group 100 is n1, and n1 satisfies: 1.5000≤n1≤1.80000. For example, n1 can be 1.55000, 1.60000, 1.65000, 1.70000, or 1.80000.

[0146] In some examples, the Abbe number of one or more lenses included in the first lens group 100 is V1, and V1 satisfies: 15.00≤V1≤60.00. For example, V1 can be 20.00, 25.00, 30.00, 40.00, 50.00 or 55.00, etc.

[0147] The second lens group 300 can move along a focusing direction, or in other words, one or more lenses in the second lens group 300 can move along a focusing direction. The focusing direction can be aligned with the second optical axis O2O2 of the second lens group 300. In this case, the above solution can also be understood as follows: the second lens group 300 or the lenses in the second lens group 300 can move along the second optical axis O2O2 toward or away from the first reflective element 200, or the second lens group 300 can move along the second optical axis O2O2 toward or away from the photosensitive element 400.

[0148] As the second lens assembly 300 moves along the second optical axis O2O2, the incident position of the light emitted by the first reflective element 200 on the second lens assembly 300 changes, and the position of the light's exit point on the side of the second lens assembly 300 closest to the photosensitive element 400 also changes. Furthermore, the optical path of the light from the second lens assembly 300 to the photosensitive element 400 changes. In other words, the imaging distance of the second lens module 3000 changes, and the position of the light's incident point on the photosensitive element 400 also changes accordingly. Thus, moving the second lens assembly 300 along the second optical axis O2O2 enables the second lens module 3000 to adjust its focus.

[0149] In some examples, the second lens module 3000 may further include a second drive platform that can drive the aforementioned second lens group 300 to move along the second optical axis O2O2. For example, the lenses in the second lens group 300 can be fixedly connected to the second drive platform (for example, mounted on the second drive platform), and the second drive platform can drive the lenses in the second lens group 300 to move along the second optical axis O2O2 during the movement along the second optical axis O2O2. For example, the second drive platform may include a voice coil motor, and under the drive of the voice coil motor, the second drive platform moves along the second optical axis O2O2.

[0150] The first reflective element 200 and the photosensitive element 400 should have a certain accommodation space along the second optical axis O2O2. The distance of this accommodation space along the second optical axis O2O2 should be greater than the distance between the lens of the second lens group 300 on the side closest to the first reflective element 200 and the lens on the side closest to the photosensitive element 400. This allows the second lens group 300 to have a certain amount of movement along the second optical axis O2O2. The larger this movement space, the wider the focus range of the second lens group 300 or the second lens module 3000.

[0151] In some examples, the second lens group 300 may have positive optical power, or in other words, when the light incident on the second lens group 300 is emitted from the second lens group 300 , the outgoing light is more convergent than the incident light.

[0152] In the case that the second lens group 300 includes one lens, the lens has positive power, and the optical axis of the lens is the second optical axis O2O2 of the second lens group 300 .

[0153] When the second lens group 300 includes multiple lenses, the lenses share the same second optical axis O2O2. The lenses can be arranged along the second optical axis O2O2. When incident light passes through the lenses, the outgoing light becomes more convergent relative to the incident light. In other words, if the lenses are considered as a whole, the lenses as a whole possess positive optical power.

[0154] In some examples, the second lens group 300 may have negative optical power, or in other words, when the light incident on the second lens group 300 is emitted from the second lens group 300 , the emitted light is more divergent than the incident light.

[0155] When the second lens group 300 includes one lens, the lens has negative optical power, and the optical axis of the lens is the second optical axis O2O2 of the second lens group 300 .

[0156] When the second lens group 300 includes multiple lenses, the lenses share the same second optical axis O2O2. The lenses can be arranged along the second optical axis O2O2. When incident light passes through the lenses, the emitted light becomes more divergent than the incident light. In other words, if the lenses are considered as a whole, the lenses as a whole have a negative optical power.

[0157] In the case where the second lens group 300 includes multiple lenses, each of the multiple lenses may have a different diverging or converging effect on light.

[0158] In some examples, as shown in FIG3 , the second lens group 300 may include five lenses, namely, a fourth lens 310 , a fifth lens 320 , a sixth lens 330 , a seventh lens 340 , and an eighth lens 350 . These five lenses may have different diverging or converging effects on incident light.

[0159] For example, the fourth lens 310 , the seventh lens 340 , and the eighth lens 350 may have positive power, and the fifth lens 320 and the sixth lens 330 may have negative power.

[0160] Also exemplarily, the fourth lens 310 and the eighth lens 350 may have positive power, and the fifth lens 320 , the sixth lens 330 , and the seventh lens 340 may have negative power.

[0161] In some examples, the second lens group 300 may include two lenses, three lenses, four lenses, or more than five lenses, and the present embodiment does not limit this. For second lens groups 300 with different numbers of lenses, the positive or negative power of each lens can also be designed based on the overall performance requirements of the second lens module 3000, and the combinations thereof are also diverse, and the present embodiment does not limit this.

[0162] Compared to having only one lens in the second lens group 300, including a larger number of lenses in the second lens group 300 increases the dimensionality of the second lens group 300 in adjusting the incident light, thereby improving the modulation effect of the second lens group 300 on the incident light and improving the imaging quality of the lens module. However, a larger number of lenses will increase the volume of the second lens group 300 to a certain extent, increasing the space occupied by the lens module.

[0163] In some examples, the second lens group 300 may include five coaxial lenses, and the second lens group 300 can adjust the incident light by adjusting the distance between two lenses and the properties of each of the two lenses.

[0164] The ability of a lens to converge or diverge light is related to the surface shape, thickness and material of the lens.

[0165] In some examples, the surface shape of one or more lenses in the second lens group 300 can be spherical or aspherical.

[0166] For example, in the case where the second lens group 300 includes five lenses, the surfaces on both sides of each of the five lenses can be spherical or aspherical, or one side of the two sides can be spherical and the other side can be aspherical.

[0167] Also illustratively, for the case where the second lens group 300 includes 1 lens, 2 lenses, 3 lenses, 4 lenses or more than 5 lenses, the two opposite surfaces of each lens can be spherical or aspherical, and this application does not impose any limitation on this.

[0168] In some examples, for an aspherical lens, its surface can also be determined according to the above formula (1).

[0169] By varying the concave and convex surfaces on both sides of the lens, the divergence or convergence of the lens on the same beam of light can be altered. FIG4 shows lenses with different surface properties provided by embodiments of the present application. The description of the different types of lenses shown in FIG4 is omitted here; for detailed descriptions, please refer to the previous text. It should be noted that the different types of lenses shown in FIG4 , as well as further types of lenses not shown in FIG4 , can all be used in the second lens assembly 300.

[0170] By adjusting the radius of curvature of the surfaces on both sides of the lens, the divergence or convergence effect of the lens on the incident light can be changed.

[0171] In some examples, referring to FIG. 3 , the second lens group 300 includes five lenses, namely a fourth lens 310 , a fifth lens 320 , a sixth lens 330 , a seventh lens 340 and an eighth lens 350 .

[0172] Illustratively, the curvature radii of the two oppositely arranged surfaces of the fourth lens 310, the fifth lens 320, the sixth lens 330, the seventh lens 340 and the eighth lens 350 may be approximately 6 mm, 7 mm, 12 mm, 31 mm, 8 mm, 5 mm, 5 mm, 12 mm, 100 mm and 8 mm, respectively.

[0173] For example, the curvature radii of the two oppositely arranged surfaces of the fourth lens 310, the fifth lens 320, the sixth lens 330, the seventh lens 340 and the eighth lens 350 may be approximately 6 mm, 8 mm, 11 mm, 18 mm, 8 mm, 5 mm, 4 mm, 9 mm, 373 mm and 9 mm, respectively.

[0174] For example, the curvature radii of the two oppositely arranged surfaces of the fourth lens 310, the fifth lens 320, the sixth lens 330, the seventh lens 340 and the eighth lens 350 may be approximately 6 mm, 10 mm, 8 mm, 9 mm, 7 mm, 3 mm, 4 mm, 10 mm, 26 mm and 7 mm, respectively.

[0175] Illustratively, the curvature radii of the two oppositely arranged surfaces of the fourth lens 310, the fifth lens 320, the sixth lens 330, the seventh lens 340 and the eighth lens 350 may be approximately 7 mm, 12 mm, 7 mm, 8 mm, 15 mm, 10 mm, 8 mm, 23 mm, 10 mm and 6 mm, respectively.

[0176] By adjusting the thickness of the lenses, the offset distance of the incident light perpendicular to the optical axis can be changed, thereby changing the position of the incident light's exit point on the lenses, and further adjusting the light's propagation path in the second lens assembly 300. The thickness of the lenses in the second lens assembly 300 can be specifically designed based on the performance of the second lens module 3000, and this application does not impose any restrictions on this.

[0177] For example, the second lens group 300 includes a fourth lens 310, a fifth lens 320, a sixth lens 330, a seventh lens 340, and an eighth lens 350. The thicknesses of the fourth lens 310, the fifth lens 320, the sixth lens 330, the seventh lens 340, and the eighth lens 350 can be expressed as h4, h5, h6, h7, and h8, respectively.

[0178] Illustratively, the thickness h4 of the fourth lens 310 may satisfy: 0.1 mm ≤ h4 ≤ 3.0 mm. For example, h4 may be 0.2 mm, 0.4 mm, 0.6 mm, 1.0 mm, 1.5 mm, or 2.5 mm.

[0179] Exemplarily, the thickness h5 of the fifth lens 320 may satisfy: 0.3 mm ≤ h5 ≤ 3.0 mm. For example, h5 may be 0.4 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, or 2.5 mm.

[0180] Exemplarily, the thickness h6 of the sixth lens 330 may satisfy: 0.3 mm ≤ h6 ≤ 3.0 mm. For example, h6 may be 0.4 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, or 2.5 mm.

[0181] Exemplarily, the thickness h7 of the seventh lens 340 may satisfy: 0.3 mm ≤ h7 ≤ 3.0 mm. For example, h7 may be 0.4 mm, 0.8 mm, 1.0 mm, 1.5 mm, 2.0 mm, or 2.5 mm.

[0182] Exemplarily, the thickness h8 of the eighth lens 350 may satisfy: 0.1 mm ≤ h8 ≤ 5.0 mm. For example, h8 may be 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, or 3.5 mm.

[0183] For a lens assembly containing multiple lenses, the ability of the lens assembly as a whole to diverge or converge incident light depends not only on the properties of each lens in the lens assembly (such as the lens's surface shape, radius of curvature, etc.), but also on the arrangement of the multiple lenses in the lens assembly. Specifically, for a lens assembly in which multiple lenses are arranged along the optical axis, the ability of the lens assembly as a whole to diverge or converge incident light depends on the distance between two adjacent lenses. By adjusting the spacing between two adjacent lenses, the focal length of the lens assembly as a whole can be adjusted to a certain extent. In addition, by adjusting the distance between the lenses on both sides of the lens assembly, the propagation path of the incident light within the lens assembly can be affected to a certain extent, affecting the position of the exit point of the incident light after passing through the lens assembly.

[0184] Taking the aforementioned second lens group 300 including the fourth lens 310, the fifth lens 320, the sixth lens 330, the seventh lens 340, and the eighth lens 350 as an example, the distances between two adjacent lenses in the fourth lens 310, the fifth lens 320, the sixth lens 330, the seventh lens 340, and the eighth lens 350 can be recorded as: D4, D5, D6, and D7, respectively.

[0185] Exemplarily, the distance D4 between the fourth lens 310 and the fifth lens 320 may satisfy: 0.01 mm≤D4≤3.0 mm. For example, D4 ​​may be 0.03 mm, 0.10 mm, 0.50 mm, 1.00 mm, 1.50 mm, or 2.50 mm.

[0186] Exemplarily, the distance D5 between the fifth lens 320 and the sixth lens 330 may satisfy: 0.2 mm ≤ D5 ≤ 5.0 mm. For example, D5 may be 0.3 mm, 0.8 mm, 1.0 mm, 2.0 mm, 3.0 mm, or 4.0 mm.

[0187] Exemplarily, the distance D6 between the sixth lens 330 and the seventh lens 340 may satisfy: 0.2 mm ≤ D6 ≤ 3.0 mm. For example, D6 may be 0.3 mm, 0.9 mm, 1.5 mm, or 2.0 mm.

[0188] For example, the distance D7 between the seventh lens 340 and the eighth lens 350 may satisfy: 0.2 mm ≤ D7 ≤ 10.0 mm. For example, D7 may be 0.3 mm, 0.5 mm, 2.0 mm, 4.0 mm, 6.0 mm, or 8.0 mm.

[0189] Changing the lens material can change the lens's refractive index for light, resulting in a difference in the angle of refraction of incident light within the lens. Therefore, changing the lens material can, to a certain extent, adjust the propagation path of incident light within the lens. The material or refractive index of the lenses in the second lens assembly 300 can be specifically designed based on the performance of the second lens assembly 300, and this application does not impose any restrictions on this.

[0190] In some examples, the lenses in the second lens group 300 can be made of plastic or glass, such as polymethyl methacrylate, polycarbonate, or cycloolefin polymer.

[0191] By selecting lens materials with different refractive indices and Abbe numbers, factors such as the propagation path of the incident light in the lens can be adjusted, thereby affecting the imaging effect of the lens module.

[0192] In some examples, the refractive index of one or more lenses included in the first lens group 100 is n2, and n2 satisfies: 1.3000≤n2≤1.70000. For example, n2 can be 1.35000, 1.40000, 1.50000, 1.60000 or 1.65000, etc.

[0193] In some examples, the Abbe number of one or more lenses included in the first lens group 100 is V2, and V2 satisfies: 15.00≤V2≤70.00. For example, V2 can be 20.00, 25.00, 40.00, 50.00, 55.00 or 60.00, etc.

[0194] By adjusting factors such as the number of lenses in the first lens group 100 and the second lens group 300, the type of lenses and the size of lenses, as well as the spacing between adjacent lenses in the lens group, and the arrangement of the first lens group 100, the first reflective element 200, the second lens group 300 and the photosensitive element 400, a lens module with certain anti-shake performance and both telephoto and macro shooting capabilities can be achieved.

[0195] Taking the second lens module 3000 shown in FIG3 as an example, G1 represents the focal length of the first lens group 100, and G2 represents the focal length of the second lens group 300. F#(1) represents the aperture size of the lens module in the first shooting state, and F#(2) represents the aperture size of the lens module in the second shooting state. EFL(1) represents the effective focal length of the lens module in the first shooting state, and EFL(2) represents the effective focal length of the lens module in the second shooting state.

[0196] H 0.5 ΔL represents half the diagonal length of the photosensitive element 400. ΔL represents the distance the second lens assembly 300 moves along the second optical axis O2O2 when the second lens module 3000 switches from the first shooting state to the second shooting state, i.e., the autofocus stroke of the lens module. S1 represents the distance from the farthest point on the side of the first lens assembly 100 away from the first reflective element 200 to the edge of the first reflective element 200 away from the first lens assembly 100. S2 represents the distance the first lens assembly 100 moves perpendicular to the first optical axis O1O1 (also known as the anti-shake stroke).

[0197] In some examples, the value of F#(1) satisfies: 2.00≤F#(1)≤3.50. For example, F#(1) can be 2.02, 2.55, 2.97, 3.20, or 3.32.

[0198] In some examples, the value of F#(2) satisfies: 2.00≤F#(2)≤3.50. For example, F#(1) can be 2.03, 2.51, 2.92, 3.12, or 3.19.

[0199] In some examples, the value of F#(1) and the value of F#(2) have a certain correspondence. For example, the values ​​of F#(1) and F#(2) can be (3.20, 3.12) or (2.97, 2.92) or (2.07, 2.03) or (3.32, 3.19), etc.

[0200] In some examples, the value of EFL(1) satisfies: 15≤EFL(1)≤30. For example, EFL(1) can be 19.00, 25.00, or 29.00.

[0201] In some examples, the value of EFL(2) satisfies: 12≤EFL(2)≤30. For example, EFL(2) can be 14.00, 20.00, 25.00, or 29.00, etc.

[0202] In some examples, the values ​​of EFL(1) and EFL(2) have a certain correspondence. For example, the values ​​of EFL(1) and EFL(2) can be (19.00, 14.48), (29.50, 28.54), or (29.49, 22.20), etc.

[0203] In some examples, the magnification of the lens module in the second shooting state is β, 0.01≤β≤0.5. For example, β can be 0.03, 0.1, or 0.3.

[0204] In some examples, the anti-shake characteristic of the lens module has an anti-shake angle of γ, where 0.5°≤γ≤3.0°. For example, γ can be 0.8°, 1.0°, or 2.0°.

[0205] In some examples, half the length H of the diagonal of the photosensitive element 400 0.5 The value can satisfy: 3.00mm≤H 0.5 ≤6.00mm. For example, H 0.5 It can be 3.70mm, 4.00mm, 4.50mm, 5.00mm or 5.50mm, etc.

[0206] In some examples, in the second shooting state, the object distance v(2) of the lens module satisfies: 60 mm ≤ v(2) ≤ 1000 mm. For example, v(2) can be 65.00 mm, 90.00 mm, 100.00 mm, 400.00 mm, 600.00 mm, or 800.00 mm.

[0207] In some examples, the auto focus stroke ΔL of the lens module satisfies the following conditions: 1.00 mm ≤ ΔL ≤ 3.00 mm. For example, ΔL can be 1.40 mm, 1.80 mm, 2.00 mm, 2.40 mm, 2.60 mm, or 2.80 mm.

[0208] In some examples, the total track length S1 of the lens module satisfies the following condition: 20.00 mm ≤ S1 ≤ 30.00 mm. For example, S1 can be 22.00 mm, 24.00 mm, 26.00 mm, or 28.00 mm.

[0209] In some examples, the anti-shake travel S2 of the lens module satisfies the following conditions: 0.20 mm ≤ S1 ≤ 0.40 mm. For example, S1 can be 0.22 mm, 0.24 mm, 0.28 mm, 0.30 mm, or 0.35 mm.

[0210] In some examples, the focal length G1 of the first lens group 100 satisfies the following relationship: 20.00 mm ≤ G1 ≤ 40.00 mm. For example, G1 can be 24.00 mm, 28.00 mm, 32.00 mm, 36.00 mm, or 38.00 mm.

[0211] In some examples, the focal lengths G1, G2, and S2 of the first lens group 100 may satisfy: For example, G1 may be 60×S2, 80×S2, 100×S2, or 120×S2, etc.

[0212] In some examples, the maximum travel of the second lens group 300 along the first direction 2001 is ΔL, and the total track length of the first lens module 2000 is S1. S1 and ΔL can satisfy: For example, ΔL may be 0.05×S1, 0.1×S1, 0.2×S1, or 0.3×S1, etc.

[0213] In some examples, the parameters of the lens module may also satisfy the following relationship: and

[0214] f1 and f2 represent the focal length of the lens farthest from the first reflective element 200 and the focal length of the lens close to the first reflective element 200 in the first lens group 100, respectively. f3 to f7 represent the focal lengths of the five lenses in the second lens group 300 from the side close to the first reflective element 200 to the side away from the first reflective element 200.

[0215] In some examples, the value of f1 may satisfy: 10.00 mm ≤ f1 ≤ 25.00 mm. For example, f1 may be 12.47 mm, 16.40 mm, 19.68 mm, or 20.60 mm.

[0216] In some examples, the value of f2 may satisfy: -80.00 mm ≤ f2 ≤ -20.00 mm. For example, f2 may be -78.68 mm, -38.97 mm, -31.01 mm, or -22.31 mm.

[0217] In some examples, the value of f3 may satisfy: -100.00 mm ≤ f3 ≤ 30.00 mm. For example, f3 may be -82.70 mm, -60.00 mm, 14.62 mm, 18.02 mm, or 23.16 mm.

[0218] In some examples, the value of f4 may satisfy: -60.00 mm ≤ f4 ≤ -10.00 mm. For example, f4 may be -53.45 mm, -32.73 mm, -26.27 mm, -15.11 mm, or -12.48 mm.

[0219] In some examples, the value of f5 may satisfy: -5.00 mm ≤ f5 ≤ 15.00 mm. For example, f5 may be -11.15 mm, -8.56 mm, 7.63 mm, 8.20 mm, or 8.91 mm.

[0220] In some examples, the value of f6 may satisfy: -150 mm ≤ f6 ≤ 80.00 mm. For example, f6 may be -144.06 mm, -67.15 mm, -26.08 mm, 5.05 mm, or 68.5 mm 4 .

[0221] In some examples, the value of f7 may satisfy: -20.00 mm ≤ f7 ≤ 25.00 mm. For example, f7 may be -24.67 mm, -15.06 mm, 13.84 mm, 15.66 mm, or 20.18 mm.

[0222] Figure 5 is a structural schematic diagram of the third lens module 4000 provided in an embodiment of the present application. The third lens module 4000 may include the first lens group 100, the first reflective element 200, the second lens group 300 and the photosensitive element 400 in the aforementioned second lens module 3000. The third lens module 4000 also includes at least one extended lens group, which can be used to adjust the light incident on the second lens group 300 or the third lens group can be used to adjust the light emitted by the second lens group 300.

[0223] In some examples, the third lens module 4000 may include a third lens group 4100, which is located between the first reflective element 200 and the second lens group 300. The light emitted by the first reflective element 200 can be incident on the second lens group 300 after passing through the third lens group 4100, and finally projected onto the photosensitive element 400.

[0224] In some examples, the third lens module 4000 may include a third lens group 4100, which is located between the second lens group 300 and the photosensitive element 400. The light emitted from the second lens group 300 passes through the third lens group 4100 and is incident on the photosensitive element 400.

[0225] In some examples, the third lens module 4000 may include two extended lens groups, or in other words, the third lens module 4000 may include a third lens group 4100 and a fourth lens group 4200. The third lens group 4100 is located between the first reflective element 200 and the second lens group 300, and the fourth lens group 4200 is located between the second lens group 300 and the photosensitive element 400. Light emitted from the first reflective element 200 passes through the third lens group 4100 and is incident on the second lens group 300. Then, light emitted from the second lens group 300 is incident on the fourth lens group 4200. Light emitted from the fourth lens group 4200 may be incident on the photosensitive element 400.

[0226] The extended lens groups in the above different situations may include one or more lenses. For example, as shown in FIG5 , the third lens group 4100 may include two lenses, and the fourth lens group 4200 may include one lens.

[0227] The surface shape of the lenses included in the extended lens group can be spherical or aspherical. For example, as shown in Figure 5, the surface shapes of the two lenses in the third lens group 4100 are both aspherical, and the surface of the lens in the fourth lens group 4200 on the side away from the photosensitive element 400 is aspherical, and the surface on the side close to the photosensitive element 400 is spherical.

[0228] The extended lens group can have positive or negative power. When the extended lens group includes multiple lenses, each lens may have positive or negative power, though this application does not impose any restrictions thereon. Specifically, the positive and negative powers of the different lenses can be determined based on the design performance of the extended lens group. For further details, please refer to the previous description regarding the design of the positive and negative power of each lens in the case of multiple lenses in the first lens group 100 or the second lens group 300. For the sake of brevity, this description will not be repeated here.

[0229] When the extended lens assembly includes multiple lenses, factors such as the surface shape of each lens, the setting of the surface curvature radius, the thickness of each lens, the spacing between adjacent lenses, and the materials used to make the lenses all affect the extended lens assembly's divergence or convergence of incident light, thereby affecting the propagation of incident light within the third lens module 4000 and the imaging quality of the lens module. The method for setting these control factors is similar to the previous description of the first lens assembly 100 and the second lens assembly 300. For details, please refer to the previous description and, for the sake of brevity, will not be repeated here.

[0230] In some examples, the position of the extended lens group in the third lens module 4000 is relatively fixed, or in other words, the positions of the extended lens group and the photosensitive element 400 are relatively fixed. During the movement of the second lens group 300 in the third lens module 4000 along the second optical axis O2O2, the distance between the second lens group 300 and the extended lens group changes, and the position of the incident point of light on the second lens group 300 and / or the position of the incident point of light on the photosensitive element 400 changes accordingly. Thus, the movement of the second lens group 300 along the second optical axis O2O2 can realize the zoom function of the third lens module 4000.

[0231] The extended lens group can adjust the propagation path of the light incident on the second lens group 300, or the extended lens group can adjust the propagation path of the light emitted by the second lens group 300. Alternatively, multiple extended lens groups can be set simultaneously to adjust the propagation path of the light incident on the second lens group 300 and the propagation path of the light emitted by the second lens group 300. The provision of the extended lens group increases the adjustable dimension of the propagation path of the light incident on the third lens module 4000, which is conducive to making the image of the third lens module 4000 on the photosensitive element 400 clearer and improving the image quality.

[0232] Figure 6 is a structural schematic diagram of the fourth lens module 5000 provided in an embodiment of the present application. The fourth lens module 5000 may include the first lens group 100, the first reflective element 200, the second lens group 300 and the photosensitive element 400 in the aforementioned second lens module 3000. The fourth lens module 5000 may also include a second reflective element, which can be used to adjust the propagation path of the light emitted by the second lens group 300.

[0233] In some examples, as shown in FIG6 , the second reflective element 5100 in the fourth lens module 5000 is located between the second lens group 300 and the photosensitive element 400. In other words, light emitted from the second lens group 300 may be reflected by the second reflective element 5100 and then incident on the photosensitive element 400. The second reflective element 5100 may include a second reflective surface, which may be inclined with respect to the second optical axis O2O2. The plane where the photosensitive element 400 is located is inclined with respect to the second optical axis O2O2. Light emitted from the second lens group 300 may be reflected by the second reflective surface and then incident on the photosensitive element 400.

[0234] For example, the plane where the photosensitive element 400 is located may be parallel to the second optical axis O2O2. In other words, the normal line of the plane where the photosensitive element 400 is located is parallel to the second optical axis O2O2.

[0235] In some examples, the second reflective element 5100 can be one or more of a plane reflector, a right-angle prism reflector, an off-axis parabolic reflector, or a hollow roof prism reflector. For example, the second reflective element 5100 can be a right-angle prism reflector. For example, in FIG6 , the second reflective element 5100 is an aspheric reflector.

[0236] The second reflective element 5100 can adjust the propagation path of the light incident on the photosensitive element 400, for example, adjusting the light originally propagating along the second optical axis O2O2 to propagate in a direction perpendicular to the second optical axis O2O2. The second reflective element 5100 can make the position of the photosensitive element 400 within the fourth lens module 5000 more flexible, which is more conducive to improving the utilization rate of the space occupied by the fourth lens module 5000 and, to a certain extent, helps to reduce the space occupied by the lens module 5000 in the direction of the second optical axis O2O2. In addition, the second reflective element 5100 can also increase the propagation path of the light before it is incident on the photosensitive element 400, which is, to a certain extent, conducive to increasing the amount of light that can be captured by the photosensitive element 400 and improving the imaging quality.

[0237] Similar to the first reflective element 200 included in the second lens module 3000, the shape, size, distance between the second reflective element 5100 and the second lens group 300, and distance between the second reflective element 5100 and the photosensitive element 400 of the second reflective element 5100 can all affect the propagation path of the incident light in the fourth lens module 5000, thereby affecting the imaging quality of the lens module.

[0238] Taking the second reflective element 5100 as a diameter prism reflective element as an example, the thickness of the second reflective element 5100 can be recorded as hr2, and hr2 can satisfy: 1.00mm≤hr2≤10.0mm. For example, hr2 can be 3.00mm, 5.00mm, 6.00mm, 6.50mm, 7.00mm, 8.00mm or 9.00mm, etc.

[0239] Taking the second reflective element 5100 as a diameter prism reflective element as an example, the distance between the second reflective element 5100 and the second lens group 300 and the distance between the second reflective element 5100 and the photosensitive element 400 can be adjusted according to the performance requirements of the lens module and combined with the layout of each component.

[0240] In some examples, the fourth lens module 5000 may also include an extended lens group included in the aforementioned third lens module 4000, which can be used to adjust the propagation path of the incident light incident on the second lens group 300 and / or the propagation path of the outgoing light emitted by the second lens group 300.

[0241] Exemplarily, the extended lens group may be disposed between the first reflective element 200 and the second lens group 300 , and configured to adjust a propagation path of incident light entering the second lens group 300 .

[0242] Also illustratively, the extended lens group can be disposed between the second lens group 300 and the second reflective element 5100 , and is used to adjust the propagation path of the outgoing light emitted by the second lens group 300 .

[0243] Still exemplarily, the number of extended lens groups can be two, and they are respectively arranged between the first reflective element 200 and the second lens group 300 and between the second lens group 300 and the second reflective element 5100, so that the extended lens group adjusts the propagation paths of both the incident light and the outgoing light of the second lens group 300.

[0244] FIG7 is a fifth lens module 6000 provided in an embodiment of the present application. The fifth lens module 6000 includes the first lens group 100 , the first reflective element 200 , the second lens group 300 , the infrared cutoff filter 500 and the photosensitive element 400 in the aforementioned first lens module 2000 .

[0245] The first lens group 100 has positive power. The first lens group 100 includes a first lens 110 and a second lens 120 . The first lens 110 has positive power, and the second lens 120 has negative power.

[0246] In some examples, the thickness of the first lens 110 is about 2.18 mm, the thickness of the second lens 120 is about 0.46 mm, and the distance between the first lens 110 and the second lens 120 is about 0.03 mm.

[0247] In some examples, the Abbe number of the first lens 110 is about 74.54 and the refractive index is about 1.5021, and the Abbe number of the second lens 120 is about 67.05 and the refractive index is about 1.1922.

[0248] In some examples, the first lens 110 includes a first mirror surface and a second mirror surface that are opposite to each other, and the second lens 120 includes a third mirror surface and a fourth mirror surface that are opposite to each other. The first mirror surface, the second mirror surface, the third mirror surface, and the fourth mirror surface are all aspherical surfaces, and the shape of the aspherical surface can be determined according to the aforementioned formula (1).

[0249] Exemplarily, as shown in FIG7 , the first mirror surface protrudes toward the negative direction of the x-axis, and the curvature radius of the first mirror surface is about 22.05 mm; the second mirror surface protrudes toward the positive direction of the x-axis, and the curvature radius of the second mirror surface is about 43.69 mm.

[0250] The third mirror surface protrudes in the positive direction of the x-axis, and the curvature radius of the third mirror surface is about 95.39 mm. The fourth mirror surface protrudes in the negative direction of the x-axis, and the curvature radius of the fourth mirror surface is about 32.35 mm.

[0251] The first lens 110 and the second lens 120 are relatively fixed, and the first lens group 100 can move in a plane perpendicular to its optical axis, thereby realizing the anti-shake function of the lens module.

[0252] The second lens group 300 includes a fourth lens 310, a fifth lens 320, a sixth lens 330, a seventh lens 340 and an eighth lens 350. The fourth lens 310 has positive optical power, the fifth lens 320 has negative optical power, the sixth lens 330 has negative optical power, the seventh lens 340 has negative optical power, and the eighth lens has positive optical power.

[0253] The second lens group 300 has positive optical power. The positions of the second lens group 300, including the fourth lens 310, the fifth lens 320, the sixth lens 330, the seventh lens 340, and the eighth lens 350, are relatively fixed. The second lens group 300 can move closer to or farther away from the photosensitive element 400 along its optical axis. In macro shooting mode, the second lens group 300 can move away from the photosensitive element 400 along the optical axis. In telephoto shooting mode, the second lens group 300 can move closer to the photosensitive element 400 along the optical axis.

[0254] In some examples, the thickness of the fourth lens 310 is approximately 2.37 mm, the thickness of the fifth lens 320, the thickness of the sixth lens 330, and the thickness of the seventh lens 340 are all approximately 0.40 mm, and the thickness of the eighth lens 350 is approximately 2.48 mm. The distance between the fourth lens 310 and the fifth lens 320 is approximately 1.43 mm, the distance between the fifth lens 320 and the sixth lens 330 is approximately 3.91 mm, the distance between the sixth lens 330 and the seventh lens 340 is approximately 0.89 mm, and the distance between the seventh lens 340 and the eighth lens 350 is approximately 2.96 mm.

[0255] In some examples, the fourth lens element 310 has an Abbe number of approximately 53.45 and a refractive index of approximately 1.5604. The fifth lens element 320 has an Abbe number of approximately 53.45 and a refractive index of approximately 1.5604. The sixth lens element 330 has an Abbe number of approximately 53.45 and a refractive index of approximately 1.5604. The seventh lens element 340 has an Abbe number of approximately 67.05 and a refractive index of approximately 1.1922. The eighth lens element 350 has an Abbe number of approximately 57.47 and a refractive index of approximately 1.3375.

[0256] In some examples, the fourth lens 310 includes a fifth mirror surface and a sixth mirror surface that are opposite to each other, the fifth lens 320 includes a seventh mirror surface and an eighth mirror surface that are opposite to each other, the sixth lens 330 includes a ninth mirror surface and a tenth mirror surface that are opposite to each other, the seventh lens 340 includes an eleventh mirror surface and a twelfth mirror surface that are opposite to each other, and the eighth lens 350 includes a thirteenth mirror surface and a fourteenth mirror surface that are opposite to each other. All of the above mirror surfaces are aspherical surfaces, and the shapes of the aspherical surfaces can be determined according to the aforementioned formula (1).

[0257] Exemplarily, as shown in FIG7 , the fifth mirror surface protrudes in the positive direction of the y-axis with a curvature radius of about 7.44 mm, and the sixth mirror surface protrudes in the positive direction of the y-axis with a curvature radius of about 11.86 mm.

[0258] The seventh mirror surface protrudes in the positive direction of the y-axis, with a curvature radius of about 6.82 mm, and the eighth mirror surface protrudes in the positive direction of the y-axis, with a curvature radius of about 8.00 mm.

[0259] The ninth mirror surface protrudes in the negative direction of the y-axis, with a curvature radius of about 14.72 mm, and the tenth mirror surface protrudes in the negative direction of the y-axis, with a curvature radius of about 10.11 mm.

[0260] The eleventh mirror surface protrudes in the negative direction of the y-axis, with a curvature radius of about 7.69 mm, and the twelfth mirror surface protrudes in the negative direction of the y-axis, with a curvature radius of about 22.92 mm.

[0261] The thirteenth mirror surface protrudes toward the positive direction of the y-axis, with a curvature radius of about 9.97 mm, and the fourteenth mirror surface protrudes toward the negative direction of the y-axis, with a curvature radius of about 5.94 mm.

[0262] Light from the object being photographed passes through the first lens 110 and the second lens 120 of the first lens group 100 in sequence and is incident on the first reflective element 200. After making a 90-degree turn, it is incident on the second lens group 300. It passes through the fourth lens 310, the fifth lens 320, the sixth lens 330, the seventh lens 340 and the eighth lens 350 in sequence, and then passes through the infrared cutoff filter 500 before being incident on the photosensitive element 400.

[0263] In some examples, the distance between the first lens group 100 and the first reflective element 200 is about 0.63 mm, the distance between the first reflective element 200 and the second lens group 300 is about 2.57 mm, and the distance between the second lens group 300 and the photosensitive element 400 is about 1.04 mm.

[0264] In some examples, the surfaces of the multiple lenses included in the first lens group 100 and the second lens group 300 may be aspherical, and the specific shapes of the lens surfaces may be determined according to the aforementioned formula (1). For example, the aspherical coefficients of the multiple lenses are shown in the following table.

[0265] Table 1

[0266] By setting the lens parameters and lens group arrangement in the lens module, the optical parameters of the fifth lens module 6000 can be obtained as shown in Table 2 below. Specifically, the focal length of the first lens group 100 is 39.98mm, and its anti-shake travel is 0.35mm, with a ratio of approximately 114. The adjustable distance ΔL along the optical axis of the second lens group 300 is 1.77mm, and the total track length of the lens module is 26.00mm, with a ratio of approximately 0.07. In macro shooting mode, the lens module can achieve a magnification of 0.1 to 0.5, and an anti-shake angle of 0.5° to 3.0°.

[0267] Table 2

[0268] Figure 8 is a sixth lens module 7000 provided in an embodiment of the present application. The sixth lens module 7000 includes the first lens group 100, the first reflective element 200, the second lens group 300, the second reflective element 5100, the infrared cutoff filter 500 and the photosensitive element 400 in the aforementioned first lens module 2000.

[0269] The first lens group 100 includes a first lens 110 and a second lens 120 . The first lens 110 has positive power, and the second lens 120 has negative power.

[0270] In some examples, the thickness of the first lens 110 is about 2.87 mm, the thickness of the second lens 120 is about 0.29 mm, and the distance between the first lens 110 and the second lens 120 is about 0.03 mm.

[0271] In some examples, the Abbe number of the first lens 110 is about 75.03 and the refractive index is about 1.4999. The Abbe number of the second lens 120 is about 67.05 and the refractive index is about 1.1922.

[0272] In some examples, the first lens 110 includes a first mirror surface and a second mirror surface that are opposite to each other, and the second lens 120 includes a third mirror surface and a fourth mirror surface that are opposite to each other. The first mirror surface, the second mirror surface, the third mirror surface, and the fourth mirror surface are all aspherical surfaces, and the shape of the aspherical surface can be determined according to the aforementioned formula (1).

[0273] Exemplarily, as shown in FIG8 , the first mirror surface protrudes in the positive direction of the x-axis, and the curvature radius of the first mirror surface is about 22.29 mm; the second mirror surface protrudes in the positive direction of the x-axis, and the curvature radius of the second mirror surface is about 9.36 mm.

[0274] The third mirror surface protrudes in the positive direction of the x-axis, and the curvature radius of the third mirror surface is about 10.33 mm. The fourth mirror surface protrudes in the positive direction of the x-axis, and the curvature radius of the fourth mirror surface is about 11.24 mm.

[0275] The second lens group 300 includes a fourth lens 310, a fifth lens 320, a sixth lens 330, a seventh lens 340 and an eighth lens 350. The fourth lens 310 has negative optical power, the fifth lens 320 has negative optical power, the sixth lens 330 has positive optical power, the seventh lens 340 has negative optical power, and the eighth lens has negative optical power.

[0276] In some examples, the thickness of the fourth lens 310 is approximately 0.28 mm, the thickness of the fifth lens 320 is approximately 1.26 mm, the thickness of the sixth lens 330 is approximately 2.84 mm, the thickness of the seventh lens 340 is approximately 2.70 mm, and the thickness of the eighth lens 350 is approximately 0.69 mm. The distance between the fourth lens 310 and the fifth lens 320 is approximately 0.03 mm, the distance between the fifth lens 320 and the sixth lens 330 is approximately 0.60 mm, the distance between the sixth lens 330 and the seventh lens 340 is approximately 0.67 mm, and the distance between the seventh lens 340 and the eighth lens 350 is approximately 0.27 mm.

[0277] In some examples, the fourth lens element 310 has an Abbe number of approximately 56.97 and a refractive index of approximately 1.3538. The fifth lens element 320 has an Abbe number of approximately 63.40 and a refractive index of approximately 1.2263. The sixth lens element 330, the seventh lens element 340, and the eighth lens element 350 all have an Abbe number of approximately 53.45 and a refractive index of approximately 1.5604.

[0278] In some examples, the fourth lens 310 includes a fifth mirror surface and a sixth mirror surface that are opposite to each other, the fifth lens 320 includes a seventh mirror surface and an eighth mirror surface that are opposite to each other, the sixth lens 330 includes a ninth mirror surface and a tenth mirror surface that are opposite to each other, the seventh lens 340 includes an eleventh mirror surface and a twelfth mirror surface that are opposite to each other, and the eighth lens 350 includes a thirteenth mirror surface and a fourteenth mirror surface that are opposite to each other. All of the above mirror surfaces are aspherical surfaces, and the shapes of the aspherical surfaces can be determined according to the aforementioned formula (1).

[0279] Exemplarily, as shown in FIG8 , the fifth mirror surface protrudes toward the negative direction of the y-axis, with a curvature radius of about 18.93 mm, and the sixth mirror surface protrudes toward the negative direction of the y-axis, with a curvature radius of about 23.62 mm.

[0280] The seventh mirror surface protrudes in the positive direction of the y-axis, with a curvature radius of about 7.19 mm, and the eighth mirror surface protrudes in the positive direction of the y-axis, with a curvature radius of about 5.05 mm.

[0281] The ninth mirror surface protrudes toward the positive direction of the y-axis, with a curvature radius of about 8.12 mm, and the tenth mirror surface protrudes toward the negative direction of the y-axis, with a curvature radius of about 10.80 mm.

[0282] The eleventh mirror surface protrudes toward the negative direction of the y-axis, with a curvature radius of approximately 18.83 mm, and the twelfth mirror surface protrudes toward the positive direction of the y-axis, with a curvature radius of approximately 22.04 mm.

[0283] The thirteenth mirror surface protrudes in the positive direction of the y-axis, with a curvature radius of about 12.37 mm. The fourteenth mirror surface protrudes in the positive direction of the y-axis, with a curvature radius of about 25.19 mm.

[0284] The light from the object being photographed passes through the first lens 110 and the second lens 120 of the first lens group 100 in sequence and is incident on the first reflective element 200, then turns 90° and is incident on the second lens group 300, and then passes through the fourth lens 310, the fifth lens 320, the sixth lens 330, the seventh lens 340 and the eighth lens 350 in sequence and is incident on the second reflective element 5100, then turns 90° and passes through the infrared cutoff filter 500 and is incident on the photosensitive element 400.

[0285] In some examples, the distance between the first lens group 100 and the first reflective element 200 is about 0.41 mm, the distance between the first reflective element 200 and the second lens group 300 is about 3.01 mm, and the distance between the second lens group 300 and the photosensitive element 400 is about 0.95 mm.

[0286] In some examples, the surfaces of the multiple lenses included in the first lens group 100 and the second lens group 300 may be aspherical, and the specific shapes of the lens surfaces may be determined according to the aforementioned formula (1). For example, the aspherical coefficients of the multiple lenses are shown in the following table.

[0287] Table 3

[0288] By setting the lens parameters and lens group arrangement in the lens module, the optical parameters of the sixth lens module 7000 can be obtained as shown in Table 4 below. Specifically, the focal length of the first lens group 100 is 28.51mm, and its anti-shake travel is 0.30mm, with a ratio of approximately 95. The adjustable distance ΔL along the optical axis of the second lens group 300 is 2.60mm, and the total track length of the lens module is 28.98mm, with a ratio of approximately 0.09. In macro shooting mode, this lens module can achieve a magnification of 0.1 to 0.5, and an anti-shake angle of 0.5° to 3.0°.

[0289] Table 4

[0290] Figure 9 is a seventh lens module 8000 provided in an embodiment of the present application. The seventh lens module 8000 includes the first lens group 100, the first reflective element 200, the second lens group 300, the infrared cutoff filter 500 and the photosensitive element 400 in the aforementioned first lens module 2000.

[0291] The first lens group 100 includes a first lens 110 and a second lens 120 . The first lens 110 has positive power, and the second lens 120 has negative power.

[0292] In some examples, the thickness of the first lens 110 is about 1.68 mm, the thickness of the second lens 120 is about 0.26 mm, and the distance between the first lens 110 and the second lens 120 is about 0.03 mm.

[0293] In some examples, the Abbe number of the first lens 110 is about 70.87 and the refractive index is about 1.5201. The Abbe number of the second lens 120 is about 61.57 and the refractive index is about 1.2521.

[0294] In some examples, the first lens 110 includes a first mirror surface and a second mirror surface that are opposite to each other, and the second lens 120 includes a third mirror surface and a fourth mirror surface that are opposite to each other. The first mirror surface, the second mirror surface, the third mirror surface, and the fourth mirror surface are all aspherical surfaces, and the shape of the aspherical surface can be determined according to the aforementioned formula (1).

[0295] Exemplarily, as shown in FIG9 , the first mirror surface protrudes in the negative direction of the x-axis, and the curvature radius of the first mirror surface is about 8.60 mm; the second mirror surface protrudes in the negative direction of the x-axis, and the curvature radius of the second mirror surface is about 391.94 mm.

[0296] The third mirror surface protrudes in the negative direction of the x-axis, and the curvature radius of the third mirror surface is about 14.50 mm. The fourth mirror surface protrudes in the negative direction of the x-axis, and the curvature radius of the fourth mirror surface is about 6.86 mm.

[0297] The second lens group 300 includes a fourth lens 310, a fifth lens 320, a sixth lens 330, a seventh lens 340 and an eighth lens 350. The fourth lens 310 has positive focal power, the fifth lens 320 has negative focal power, the sixth lens 330 has positive focal power, the seventh lens 340 has negative focal power, and the eighth lens has positive focal power.

[0298] In some examples, the thickness of the fourth lens 310 is approximately 0.30 mm, the thickness of the fifth lens 320 is approximately 0.28 mm, the thickness of the sixth lens 330 is approximately 0.97 mm, the thickness of the seventh lens 340 is approximately 0.52 mm, and the thickness of the eighth lens 350 is approximately 3.43 mm. The distance between the fourth lens 310 and the fifth lens 320 is approximately 0.03 mm, the distance between the fifth lens 320 and the sixth lens 330 is approximately 1.26 mm, the distance between the sixth lens 330 and the seventh lens 340 is approximately 1.57 mm, and the distance between the seventh lens 340 and the eighth lens 350 is approximately 6.51 mm.

[0299] In some examples, the fourth lens element 310 has an Abbe number of approximately 62.76 and a refractive index of approximately 1.2351. The fifth lens element 320 has an Abbe number of approximately 63.31 and a refractive index of approximately 1.2281. The sixth lens element 330 and the seventh lens element 340 both have an Abbe number of approximately 53.45 and a refractive index of approximately 1.5604. The eighth lens element 350 has an Abbe number of approximately 60.60 and a refractive index of approximately 1.2651.

[0300] In some examples, the fourth lens 310 includes a fifth mirror surface and a sixth mirror surface that are opposite to each other, the fifth lens 320 includes a seventh mirror surface and an eighth mirror surface that are opposite to each other, the sixth lens 330 includes a ninth mirror surface and a tenth mirror surface that are opposite to each other, the seventh lens 340 includes an eleventh mirror surface and a twelfth mirror surface that are opposite to each other, and the eighth lens 350 includes a thirteenth mirror surface and a fourteenth mirror surface that are opposite to each other. All of the above mirror surfaces are aspherical surfaces, and the shapes of the aspherical surfaces can be determined according to the aforementioned formula (1).

[0301] Exemplarily, as shown in FIG9 , the fifth mirror surface protrudes toward the negative direction of the y-axis, with a curvature radius of about 12.13 mm, and the sixth mirror surface protrudes toward the negative direction of the y-axis, with a curvature radius of about 63.40 mm.

[0302] The seventh mirror surface protrudes in the positive direction of the y-axis, with a curvature radius of about 6.63 mm, and the eighth mirror surface protrudes in the positive direction of the y-axis, with a curvature radius of about 8.29 mm.

[0303] The ninth mirror surface protrudes toward the positive direction of the y-axis, with a curvature radius of about 14.24 mm, and the tenth mirror surface protrudes toward the negative direction of the y-axis, with a curvature radius of about 7.02 mm.

[0304] The eleventh mirror surface protrudes in the positive direction of the y-axis, with a curvature radius of about 38.29 mm, and the twelfth mirror surface protrudes in the positive direction of the y-axis, with a curvature radius of about 5.71 mm.

[0305] The thirteenth mirror surface protrudes in the negative direction of the y-axis, with a curvature radius of about 4.52 mm. The fourteenth mirror surface protrudes in the negative direction of the y-axis, with a curvature radius of about 12.62 mm.

[0306] Light from the object being photographed passes through the first lens 110 and the second lens 120 of the first lens group 100 in sequence and is incident on the first reflective element 200. After making a 90-degree turn, it is incident on the second lens group 300. It passes through the fourth lens 310, the fifth lens 320, the sixth lens 330, the seventh lens 340 and the eighth lens 350 in sequence, and then passes through the infrared cutoff filter 500 before being incident on the photosensitive element 400.

[0307] In some examples, the distance between the first lens group 100 and the first reflective element 200 is about 0.41 mm, the distance between the first reflective element 200 and the second lens group 300 is about 3.01 mm, and the distance between the second lens group 300 and the photosensitive element 400 is about 0.95 mm.

[0308] In some examples, the surfaces of the multiple lenses included in the first lens group 100 and the second lens group 300 may be aspherical, and the specific shapes of the lens surfaces may be determined according to the aforementioned formula (1). For example, the aspherical coefficients of the multiple lenses are shown in the following table.

[0309] Table 5

[0310] By setting the lens parameters and lens group arrangement in the lens module, the optical parameters of the seventh lens module 8000 can be obtained as shown in Table 6 below. Specifically, the focal length of the first lens group 100 is 24.68mm, and its anti-shake travel is 0.216mm, with a ratio of approximately 114. The adjustable distance ΔL along the optical axis of the second lens group 300 is 1.43mm, and the total track length of the lens module is 24.00mm, with a ratio of approximately 0.06. In macro shooting mode, this lens module can achieve a magnification of 0.1 to 0.5, and an anti-shake angle of 0.5° to 3.0°.

[0311] Table 6

[0312] Figures 10 and 11 illustrate schematic diagrams of the first lens module 2000 provided by the present application in a first shooting state and a second shooting state. For ease of illustration, the first reflective element 200 is not shown in the figures. The first lens group 100 is relatively fixed in position along the optical axis, while the second lens group 300 can be moved closer to or further away from the photosensitive element 400 along the optical axis. The following further illustrates the focusing function of the lens module provided by the embodiments of the present application, in conjunction with Figures 10 and 11.

[0313] EFL represents the effective focal length of the first lens module 2000, G1 and G2 represent the focal length of the first lens group 100 and the focal length of the second lens group 300 respectively, u and v represent the phase distance and object distance of the first lens module 2000 respectively, and d represents the distance between the first lens group 100 and the second lens group 300.

[0314] According to the imaging formula, u and v are both positively correlated with EFL, and u and v are negatively correlated with each other. Furthermore, according to the imaging principle, the focal length EFL of the first lens module 2000, which is composed of multiple lenses, is positively correlated with the distance d between the first lens group 100 and the second lens group 300.

[0315] In the first shooting state shown in FIG10 , the second lens group can be moved toward the photosensitive element 400. The adjusted distance between the first lens group and the second lens group is denoted as d1. The adjusted distance d1 is greater than the initial distance d0. Since d is positively correlated with EFL, when d=d1, EFL increases from the initial value EFL(0) to EFL(1), i.e., EFL(1)>EFL(0).

[0316] When the first lens group approaches the photosensitive element, the distance u of the lens module gradually decreases. The adjusted distance is recorded as u1, and the adjusted distance u1 is smaller than the initial value u0 of the distance.

[0317] Increasing the focal length and reducing the distance of the first lens module 2000 can both increase its object distance. In other words, adjusting the distance between the second lens group and the first lens group allows the object distance of the first lens module 2000 to have a larger adjustment space, so that the first lens module 2000 can capture objects farther away.

[0318] In the second shooting state shown in FIG11 , the second lens group 300 can be moved away from the photosensitive element 400. The adjusted distance between the first lens group and the second lens group is denoted as d2. The adjusted distance d2 is smaller than the initial distance d0. Since d is positively correlated with EFL, when d=d2, EFL decreases from the initial value EFL(0) to EFL(2), i.e., EFL(2)<EFL(0).

[0319] When the second lens group 300 approaches the photosensitive element, the distance u of the first lens module 2000 gradually decreases. The adjusted distance is u2. The adjusted distance u2 is greater than the initial value u0 of the distance.

[0320] The reduction of the focal length and the increase of the distance of the first lens module 2000 can both reduce its object distance. In other words, adjusting the distance between the second lens group 300 and the first lens group 100 allows the object distance of the first lens module 2000 to have a larger adjustment space, so that the first lens module 2000 can capture closer objects.

[0321] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A lens module, characterized in that: include: a first lens group, a first reflective element, a second lens group and a photosensitive element, The first lens group includes one or more lenses, the first lens group is fixedly spaced from the first reflective element in a first direction, the first direction is the axial direction of the first lens group, the first lens group is configured to be movable in a first plane, and the first plane is perpendicular to the first direction; The second lens group includes one or more lenses, and the second lens group is configured to be close to or away from the first reflective element along a second direction, and the second direction is the axial direction of the second lens group; The first reflective element is fixed relatively to the photosensitive element; The incident light passes through the first lens group and is incident on the first reflective element, is reflected by the first reflective element and is incident on the second lens group, and is incident on the photosensitive element after passing through the second lens group.

2. The lens module according to claim 1, characterized in that: The lens module also includes a first platform, the first lens group is fixedly connected to the first platform, and the first platform is used to drive the first lens group to move in the first plane.

3. The lens module according to claim 1 or 2, characterized in that: The focal length of the first lens group is G1, the maximum travel of the first lens group in the first plane is 2×Ld, and G1 and Ld satisfy:

4. The lens module according to any one of claims 1 to 3, characterized in that: The lens module also includes a second platform, the second lens group is fixedly connected to the second platform, and the second platform is used to drive the second lens group to approach or move away from the first reflective element along the second direction.

5. The lens module according to any one of claims 1 to 4, characterized in that: The total track length of the lens module is Lt, the maximum travel of the second lens group in the second direction is Mv, and Lt and Mv satisfy:

6. The lens module according to any one of claims 1 to 5, characterized in that: The first lens group has positive optical power.

7. The lens module according to any one of claims 1 to 6, characterized in that: The optical axis of the first lens group is perpendicular to the optical axis of the second lens group.

8. The lens module according to any one of claims 1 to 7, characterized in that: The lens module also includes a third lens group, which includes one or more lenses. The third lens group is located on a side of the second lens group close to the first reflective element, and the third lens group is relatively fixed to the first reflective element.

9. The lens module according to any one of claims 1 to 8, characterized in that: The lens module also includes a fourth lens group, which includes one or more lenses. The fourth lens group is located on a side of the second lens group away from the first reflective element, and the fourth lens group is relatively fixed to the first reflective element.

10. The lens module according to any one of claims 1 to 9, characterized in that: The lens module also includes a second reflective element, which is located on a side of the second lens group away from the first reflective element, and the second reflective element is arranged close to the photosensitive element.

11. The lens module according to any one of claims 1 to 10, characterized in that: The lens module also includes an infrared cutoff filter, which is located on a side of the second lens group away from the first reflective element, and the infrared cutoff filter is arranged close to the photosensitive element.

12. An electronic device, characterized in that: It comprises a middle frame and the lens module according to any one of claims 1 to 11, wherein the lens module is fixedly connected to the middle frame.

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