Optical lens, camera module and electronic device

Abstract

An optical lens (10), a camera module (100) and an electronic device (1000). The optical lens (10) comprises: a front lens group, a first reflector (18) and a rear lens group which are arranged in sequence from an object side to an image side, wherein the first reflector (18) is used for reflecting light from the front lens group to the rear lens group; the front lens group is a fixed lens group; and the first reflector (18) is rotatably disposed in the lens to achieve optical image stabilization.

Description

Optical lenses, camera modules and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on December 4, 2023, with application number 202311648143.9 and application name “Optical lens, camera 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 technical field of photographing equipment, and in particular to an optical lens, a camera module and an electronic device. Background Art

[0003] With the advancement of technology and economic development, people have increasingly higher requirements for the camera functions of portable electronic devices. They not only require the camera modules equipped with these devices to be able to achieve telephoto shooting, but also require them to have optical image stabilization (OIS) functions to improve photo quality and enhance the user's photography experience.

[0004] Figure 4 shows an optical lens with optical image stabilization. The optical lens includes a prism 1a and multiple lenses 1b disposed on the image side of the prism 1a. These lenses 1b form an imaging lens group and image light onto an image sensor 2. An image stabilization motor (not shown) drives the prism 1a to perform shake compensation, thereby improving image quality.

[0005] Currently, in order to facilitate anti-shake design, the prism 1a is usually set at the object side edge of the optical path, and the multiple lenses 1b used for imaging are all set on the image side of the prism 1a. Since there are a large number of lenses 1b and they need to be set at intervals to achieve autofocus, the optical lens has a larger size in the Z-axis direction in Figure 4, that is, the optical lens is relatively long, which is disadvantageous to the internal structural design of the electronic device.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide an optical lens, a camera module, and an electronic device, which can reduce the size of the optical lens in the Z-axis direction while achieving normal optical image stabilization, that is, can reduce the length of the optical lens, thereby facilitating the internal structural design of the electronic device.

[0008] In a first aspect, an optical lens is provided, comprising: a front lens group, a first reflector, and a rear lens group arranged in sequence from the object side to the image side, the first reflector being used to reflect light from the front lens group to the rear lens group; the front lens group is a fixed lens group, and the first reflector is rotatably configured in the lens to achieve optical image stabilization.

[0009] The optical lens provided in the embodiment of the present application has a front lens group disposed on the object side of the first reflector, and the front lens group includes at least one lens. That is, some of the lenses of the optical lens can be disposed on the object side of the first reflector, rather than all of them being disposed on the image side of the first reflector. In this way, since the number of lenses disposed on the image side of the optical lens is reduced, the size of the optical lens in the Z-axis direction can be reduced, that is, the length of the optical lens can be reduced. This further expands the space for arranging other components within the electronic device, effectively optimizes the internal structure of the electronic device, reduces the difficulty of structural design and layout within the electronic device, and facilitates the miniaturization and lightweight design of the electronic device, thereby improving the user experience.

[0010] The first reflector is used to reflect the light from the front lens group to the rear lens group, so that the optical lens can achieve a periscope structural layout. The first reflector is rotatably configured in the lens and can rotate under the drive of the anti-shake motor, thereby achieving optical image stabilization and improving the shooting quality of the optical lens. Since the front lens group is a fixed lens group, the anti-shake motor only needs to drive the first reflector when performing optical image stabilization, and does not need to drive the front lens group and the rear lens group. The moving parts of the optical image stabilization can be simplified, so that the workload of the anti-shake motor is smaller, the design requirements of the motor are reduced, and the design of the anti-shake motor and the camera module becomes easier. Since the lens does not participate in shake compensation, the number of movable lenses can be reduced, so that more lenses can be fixed on the optical path, and the relative positions of more lenses become fixed, thereby reducing the influence of tolerance on the imaging point and improving the imaging stability, so that the optical lens provided in the embodiment of the present application has good imaging quality and high imaging clarity.

[0011] The optical lens provided in the embodiments of the present application optimizes its lens structure to achieve normal optical image stabilization while reducing its size in the Z-axis direction, that is, its length, thereby facilitating the internal structural design of electronic devices. This optical lens also facilitates the design of image stabilization motors and camera modules, and provides excellent imaging quality.

[0012] In one possible implementation, the optical lens has an exit optical axis located on the image side of the center point of the first reflector, and the first reflector is configured to rotate around a rotation point; the projection point of the rotation point on the straight line where the exit optical axis is located is located on the exit optical axis; or, the projection point of the rotation point on the straight line where the exit optical axis is located is located on the reverse extension line of the exit optical axis, and the distance L between the projection point and the center point and the effective focal length EFL of the optical lens satisfy: L / EFL≤2.0.

[0013] By rationally selecting the position of the rotation point as described above, the embodiment of the present application can ensure the integrity of the optical path, so that when the first reflector rotates to different positions, it can ensure that the light is reliably reflected to the rear lens group, reducing or avoiding light loss caused by anti-shake, and ensuring that the position differences of the light reaching each lens are small. Through the above-mentioned setting, the present application can ensure that the amount of light reflected by the first reflector into the rear lens group in different anti-shake states (i.e., different positions) will not produce significant differences, that is, it can ensure that the image clarity will not produce significant differences in different anti-shake states, ensuring that the optical lens always has good imaging quality.

[0014] In a possible implementation, the first reflector is configured to perform pitch-axis anti-shake and yaw-axis anti-shake, and the rotation point is an intersection of the pitch axis and the yaw axis.

[0015] In a possible implementation, the rear lens group is configured to move as a whole along the output optical axis to achieve autofocus.

[0016] In a possible implementation, the rear lens group includes a first lens group and a second lens group, and the first lens group or the second lens group is configured to move along the exit optical axis to achieve autofocus.

[0017] By varying the distance between the first and second lens groups, this application enables the optical lens to achieve both long-range shooting with high-quality imaging and strong close-up shooting capabilities, enabling wide-range imaging from distant to near objects. The use of a single-group focusing method simplifies the movement of the optical lens's focusing structure, thereby simplifying the focusing method.

[0018] In a possible implementation, the focal length of the first lens group is positive, and the focal length of the second lens group is negative.

[0019] Through the above settings, the optical lens can achieve better macro shooting performance.

[0020] In a possible implementation, the first lens group includes at least two lenses, wherein an Abbe number of at least one lens is less than 45, and the second lens group includes at least one lens.

[0021] Through the above settings, the optical lens can achieve better macro shooting performance and balance various aberrations, which is conducive to improving imaging quality.

[0022] In a possible implementation, the focal length F1 of the front lens group and the overall focal length Fs of the optical lens satisfy: |F1 / Fs|>1.2.

[0023] That is, the absolute value of the ratio of F1 to Fs is greater than 1.2. The above arrangement ensures that the amount of light reflected by the first reflector into the rear lens group does not vary significantly under different anti-shake conditions (i.e., different positions). This ensures that the image clarity does not vary significantly under different anti-shake conditions, ensuring that the optical lens 10 always has excellent image quality.

[0024] In a possible implementation, the optical lens further includes a second reflector located on the image side of the rear lens group, and the second reflector is used to deflect light from the rear lens group.

[0025] This embodiment uses two reflectors to deflect the propagation angle of light, allowing for flexible adjustment of the image sensor's placement to achieve better space utilization. The light can be deflected so that the plane of the image sensor can be parallel to the electronic device's display. This frees the placement of the image sensor from the thickness of the electronic device, allowing for larger image sensors, which in turn improves image quality.

[0026] Optionally, the second reflective element may be a reflector or a prism.

[0027] In a possible implementation, the field of view angle of the optical lens is less than 60°.

[0028] The optical lens provided in this application has a smaller field of view angle to obtain a stronger long-range shooting capability, and the imaging quality in long-range shooting is high.

[0029] In a possible implementation, the image height of the optical lens is greater than 2 mm.

[0030] The optical lens provided in the present application has a larger sensor plate size to obtain a stronger long-range shooting capability, and the imaging quality in the long-range shooting is high.

[0031] In a possible implementation, the focal length of the rear lens group is positive.

[0032] In a possible implementation manner, the first reflector is a reflector or a prism.

[0033] In a second aspect, a camera module is provided, comprising an anti-shake motor and an optical lens provided by any possible implementation method of the first aspect, wherein the anti-shake motor is used to drive the first reflector to achieve optical image stabilization.

[0034] Optionally, the camera module further includes an image sensor located on the image side of the optical lens.

[0035] Optionally, the anti-shake motor may be any one of a voice coil motor, a piezoelectric motor, a shape memory alloy motor, a MEMS motor, a suspended wire motor, and a ball motor.

[0036] In a third aspect, an electronic device is provided, comprising a posture sensor, a processing unit, and the camera module provided in the second aspect, wherein the posture sensor is used to collect jitter information of the electronic device and send the jitter information to the processing unit, and the processing unit is used to control the anti-shake motor according to the jitter information.

[0037] Optionally, the posture sensor includes but is not limited to a gyroscope, an accelerometer, an inertial sensor, a Hall sensor, or a magnetic encoder, etc. For example, the posture sensor may be a micro-electromechanical system gyroscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a comparison of the camera effects of a camera module without optical image stabilization function and a camera module with optical image stabilization function.

[0039] Figure 2 is a schematic diagram of the principle of five-axis optical image stabilization.

[0040] FIG3 is a schematic diagram showing the principles of lens stabilization and image sensor stabilization.

[0041] FIG4 is a schematic structural diagram of a camera module in the prior art.

[0042] FIG5 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0043] FIG6 is a schematic structural diagram of the camera module provided in Example 1 of the present application.

[0044] FIG7 is a control principle diagram of optical image stabilization performed by an electronic device provided in an embodiment of the present application.

[0045] FIG. 8 is a schematic diagram of two different arrangement positions of the rotation point of the first reflective element.

[0046] FIG. 9 is a schematic diagram showing a method for forming a rotation point of the first reflective element.

[0047] FIG10 is a schematic diagram of the optical path when the camera module provided in the first embodiment of the present application focuses on a distant view.

[0048] FIG11 is a schematic diagram of the optical path when the camera module provided in Example 1 of the present application focuses on a close-up view.

[0049] FIG12 is a diagram showing a simulation effect of the optical lens shown in FIG10 when focusing on a distant view.

[0050] FIG13 is a diagram showing a simulation effect of the optical lens shown in FIG11 when focusing on a close-up view.

[0051] FIG14 is a schematic structural diagram of the camera module provided in Example 2 of the present application.

[0052] FIG15 is a diagram showing a simulation effect of the optical lens shown in FIG14 when focusing on a distant view.

[0053] FIG16 is a schematic structural diagram of the camera module provided in the third embodiment of the present application when focusing on a distant view.

[0054] Figure 17 is a structural diagram of the camera module provided in Example 3 of the present application when focusing on a close-up view.

[0055] FIG18 is a diagram showing the simulation effect of the optical lens shown in FIG16 when focusing on a distant view.

[0056] FIG19 is a diagram showing the simulation effect of the optical lens shown in FIG17 when focusing on a close-up view.

[0057] Figure 20 is a structural diagram of the camera module provided in Example 4 of the present application when focusing on a distant view.

[0058] Figure 21 is a structural diagram of the camera module provided in Example 4 of the present application when focusing on a close-up view.

[0059] FIG22 is a simulation diagram of the optical lens shown in FIG20 when focusing on a distant view.

[0060] FIG23 is a simulation diagram of the optical lens shown in FIG21 when focusing on a close-up view.

[0061] Reference numerals:

[0062] 1-Lens; 1a-Reflective element; 1b-Lens; 2-Image sensor; 3. Infrared filter;

[0063] 10 - Optical lens; 11 - First lens; 12 - Second lens; 13 - Third lens; 14 - Fourth lens; 15 - Fifth lens; 16 - Sixth lens; 17 - Seventh lens; 18 - First reflector; 19 - Aperture stop; 20 - Image sensor; 21 - Second reflector; 30 - Filter; 40 - Anti-shake motor; 41 - Drive unit;

[0064] 100-camera module; 200-back cover; 300-display; 400-frame; 500-posture sensor; 600-processing unit; 1000-electronic equipment;

[0065] G1-first lens group; G2-second lens group; OA-optical axis; OA1-exit optical axis; OA2-incident optical axis; P1-rotation point; P2-center point of reflection surface; P3-projection point; S1-first rotation axis; S2-second rotation axis. DETAILED DESCRIPTION

[0066] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout 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 only used to explain the present application, and should not be understood as limiting the present application.

[0067] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0068] In the description of this application, it should be understood that the terms "upper", "lower", "side", "front", "rear", etc. indicate orientations or positional relationships based on the installation, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0069] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0070] The term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0071] For ease of understanding, the technical terms involved in this application are explained and described below.

[0072] Lens: A component that uses the refraction principle of the lens to allow the light of the scene to pass through the lens and form a clear image on the focal plane.

[0073] Optical axis (OA): The direction of light propagation through an optical system, referenced to the principal ray at the center of the field of view. For symmetrical transmissive systems, this axis typically coincides with the system's rotational axis. For off-axis and reflective systems, the optical axis may also appear as a broken line.

[0074] Object side and image side: With the lens as the boundary, the side where the object is located is the object side, and the surface of the lens close to the object side can be called the object side side; with the lens as the boundary, the side where the image of the object is located is the image side, and the surface of the lens close to the image side can be called the image side side.

[0075] Aperture: Aperture is a device used to control the amount of light that passes through the lens and reaches the photosensitive surface inside the camera body. It is usually located inside the lens. The aperture size is expressed as an F number.

[0076] Aperture (F / no): This is equal to the lens focal length divided by the entrance pupil diameter. With the lens focal length unchanged, a larger entrance pupil diameter results in a larger aperture and a smaller F / no. This allows more light to enter, resulting in a brighter image and a more blurred background. Conversely, a smaller entrance pupil diameter results in a smaller aperture and a larger F / no. This reduces light intake, leading to a darker image and sharper backgrounds.

[0077] Focal length: Also known as focal length, it is a measure of the convergence or divergence of light in an optical system. It refers to the distance from the optical center of a lens or lens group to the focal point when an infinitely distant scene is formed into a sharp image on the focal plane. It can also be understood as the vertical distance from the optical center of the lens or lens group to the focal plane. From a practical perspective, it can be understood as the distance from the center of the lens to the imaging plane.

[0078] Effective focal length (EFL): The distance from the principal plane of an optical system to the corresponding focus.

[0079] Focus: Focusing is also called focusing or focusing. Focusing is the process of changing the distance between the subject and the subject using the camera's focus mechanism to achieve a clear image of the subject. Digital cameras typically have a variety of focus modes, including autofocus, manual focus, and multiple focus modes.

[0080] Autofocus (AF): AF utilizes the principle of light reflection from the subject. After the reflected light passes through the lens, it is imaged and received by the image sensor. Computer processing then determines the object distance, automatically moving the lens based on the object distance to achieve focusing. Autofocus enables objects at varying distances to be imaged clearly on the image sensor. Camera modules typically use a power structure such as a voice coil motor (VCM) to control the forward and backward movement of the optical lens along the optical axis, adjusting the distance between the lens and the image sensor to achieve autofocus.

[0081] Field of view (FOV): Also known as field of view, in optical instruments, the angle formed by 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.

[0082] Refractive Index: When light enters a non-absorbing homogeneous material, it will be reflected and refracted at its interface. The refractive index n is equal to the ratio of the speed of light in a vacuum (c) to the speed of light in the medium (v). In practice, the refractive index is measured by measuring the angle of deflection caused by refraction of the light beam at the interface. The formula describing this deflection is called Snell's law.

[0083] Aperture stop (STO): A diaphragm that limits the maximum inclination angle of the marginal rays in the imaging beam of an on-axis point, that is, the diaphragm with the smallest incident aperture angle. Here, the aperture refers to the edge, frame, or specially designed perforated barrier of an optical element in an optical assembly used to limit the size of the imaging beam or the imaging spatial unit.

[0084] Dispersion: The property of a material's refractive index changing with the frequency of the incident light is called "dispersion." For example, after sunlight passes through a prism, it produces a continuous spectrum of colors arranged in sequence from red to violet. In a broad sense, dispersion not only refers to the decomposition of light waves into a spectrum, but also any physical quantity that changes with frequency (or wavelength) is called dispersion. In the embodiment of the present application, after the complex light enters the lens, since the lens has different refractive indices for light of different frequencies, the propagation directions of the various colors of light are deflected to varying degrees, and thus disperse when leaving the lens, which is called "dispersion."

[0085] Dispersion coefficient: An important indicator of lens imaging quality, usually expressed as the Abbe number, is also called the Abbe number. The larger the dispersion coefficient (Abbe number), the less pronounced the dispersion and the better the lens's imaging quality. The smaller the dispersion coefficient (Abbe number), the more pronounced the dispersion and the poorer the lens's imaging quality.

[0086] Aberration: The paraxial region of an optical system has the properties of an ideal optical system. The paraxial light emitted from a point on the object intersects the image plane at a point (also known as the paraxial image point). However, the light rays that actually pass through different apertures of the lens are unlikely to intersect perfectly at a point. Instead, there is a certain deviation from the position of the paraxial image point. These differences are collectively called aberrations.

[0087] Longitudinal spherical aberration, also known as longitudinal chromatic aberration, positional chromatic aberration, or axial chromatic aberration, occurs when a beam of light parallel to the optical axis converges at different positions before and after passing through a lens. This is called positional chromatic aberration or axial chromatic aberration. This is because the lens forms images of different wavelengths at different positions, causing the focal planes of the different colors of light to not coincide in the final image, resulting in the dispersion of the complex light.

[0088] Distortion: Also known as distortion, it refers to the degree to which the image formed by an optical system is distorted relative to the object itself. Distortion is caused by spherical aberration. The height of the intersection of the chief rays of light from different fields of view with the Gaussian image plane after passing through the optical system is not equal to the ideal image height. The difference between the two is the distortion. Therefore, distortion only changes the position of off-axis object points on the ideal plane, distorting the image shape but not affecting image clarity.

[0089] Image height (ImgH): It represents half of the diagonal length of the effective pixel area on the photosensitive chip, that is, the image height of the imaging surface.

[0090] Astigmatism: Because the object point is not on the optical axis of an optical system, the light beam it emits is tilted at an angle to the optical axis. After refraction by a lens, the convergence points of its meridional and sagittal beamlets are not the same. This means that the beam cannot be focused to a single point, resulting in an unclear image and astigmatism. Meridional and sagittal beamlets are the names for light beams in two perpendicular planes within a rotationally symmetric optical system.

[0091] Field curvature: Field curvature describes the difference in the optical axis between the sharpest image point of non-central field rays and the sharpest image point of the central field rays after passing through an optical lens system. When a lens exhibits field curvature, the intersection of the entire beam of light does not coincide with the ideal image point. Although a sharp image point is obtained at each specific point, the entire image plane is a curved surface.

[0092] With technological advancements and economic development, people have increasingly higher expectations for the camera capabilities of portable electronic devices. They not only require camera modules capable of blurring the background and providing clear nighttime shots, but also demand optical image stabilization (OIS) to improve photo quality and enhance the user experience.

[0093] When users use the camera module of an electronic device to take photos or videos, the captured images are prone to blurring due to hand shaking, shaking of the photographed object, or limitations of the optical environment. Optical image stabilization technology can effectively solve this problem. Optical image stabilization refers to the use of optical components, such as lens settings, in imaging instruments such as cameras to avoid or reduce instrument shake during the capture of optical signals to improve image quality. A common practice is to use a gyroscope for shake detection, and then use a drive mechanism such as a voice coil motor to translate or rotate the lens or image sensor in the opposite direction to compensate for image blur caused by shaking of the imaging instrument during exposure.

[0094] Figure 1 compares the camera effects of a camera module without and with optical image stabilization. Part (a) of Figure 1 shows the camera effect of the camera module without optical image stabilization, while part (b) of Figure 1 shows the camera effect of the camera module with optical image stabilization.

[0095] As shown in Figure 1 (a), at time t0, light is refracted by lens 1 and directed toward image sensor 2. At this point, the user's hand and the object being photographed are both stationary, resulting in an ideal image. However, at time t1, hand tremors cause the entire camera module to tilt and shake, causing the light that should have been incident on imaging point S1 to shift and instead enter imaging point S2. This results in a blurry image, impacting the user experience.

[0096] As shown in Figure 1 (b), when an electronic device features optical image stabilization, its gyroscope detects device shake and can use the image stabilization motor to translate or rotate lens 1 in the opposite direction to compensate for image blur caused by shake during exposure. This movement of lens 1 by the image stabilization motor ensures that light that should have entered imaging point S1 in the image does not deviate to other locations, thereby ensuring photo quality and improving the user's photography experience.

[0097] Figure 2 is a schematic diagram of the principles of five-axis optical image stabilization. As shown in Figure 2, to maximize shake compensation and ensure image quality, after detecting electronic device shake using sensors such as a gyroscope, the camera's lens or image sensor is subjected to five-axis anti-motion compensation: X-axis translation, Y-axis translation, roll, yaw, and pitch. This ensures that the lens and image sensor remain stationary within the electronic device while taking the photo, achieving image stabilization.

[0098] In practice, due to physical limitations, multiple actuators are often required to achieve full five-axis anti-motion compensation. For example, lens OIS (Optical Image Stabilization) targets pitch and yaw, while sensor OIS (Optical Image Stabilization) targets X, Y, and roll.

[0099] Optical image stabilization can be divided into two types: lens OIS, which achieves image stabilization by moving the lens, and sensor OIS, which achieves image stabilization by moving the image sensor. Figure 3 shows the principles of lens OIS and image sensor OIS. Part (a) of Figure 3 shows the principle of a camera module with image sensor OIS, while part (b) of Figure 3 shows the principle of lens OIS.

[0100] As shown in Figure 3 (a), image sensor stabilization achieves optical image stabilization by moving image sensor 2, enabling stabilization along the X, Y, and roll axes. However, this solution requires moving the electrical signals of image sensor 2, which is technically challenging and increases the size of the module. As shown in Figure 3 (b), lens stabilization achieves optical image stabilization by moving lens 1. This is simple to implement and does not require any electrical signal movement. Lens stabilization typically provides two-axis stabilization: yaw and pitch.

[0101] The embodiments of the present application mainly relate to technical improvements to the lens anti-shake solution. The following will continue to introduce the lens anti-shake by taking the camera module shown in Figure 4 as an example. As shown in Figure 4, the camera module includes a prism 1a arranged in sequence along the optical axis OA, an imaging lens group composed of multiple lenses 1b, a filter 3 and an image sensor 2. The light on the object side is incident on the prism 1 along the Y direction (i.e., the thickness direction of the mobile phone), deflected 90° by the reflecting surface of the prism 1, and is imaged on the image sensor 2 after passing through the converging effect of the imaging lens group and the filtering effect of the filter 3 in sequence along the Z axis direction (i.e., the length direction of the mobile phone).

[0102] The above-mentioned camera module also includes an anti-shake motor (not shown in the figure), which is used to drive the prism 1a to perform shake compensation to improve the shooting quality. As shown in Figure 4, the anti-shake motor can drive the prism 1a to rotate around the Y-axis in the figure, that is, drive the right-angle prism 1a to shake its head to achieve anti-shake on the deflection axis. In addition, the anti-shake motor can also drive the prism 1a to rotate around the X-axis perpendicular to the paper in the figure, that is, drive the prism 1a to nod (raise its head) to achieve anti-shake on the pitch axis. In some cases, the anti-shake motor can simultaneously drive the prism 1a to rotate around the deflection axis and the pitch axis to achieve better optical anti-shake effect. At this time, driven by the anti-shake motor, the right-angle prism 1a will rotate around the intersection of the deflection axis and the pitch axis, and the intersection of the deflection axis and the pitch axis is the rotation point of the prism 1a.

[0103] In the optical lens shown in FIG4 , in order to facilitate anti-shake design, the prism 1a is usually arranged at the object side (outer side) edge of the optical path, and the multiple lenses 1b used for imaging are all arranged on the image side (inner side) of the prism 1a. Since there are a large number of lenses 1b and they need to be arranged at intervals to achieve autofocus, the optical lens has a larger size in the Z-axis direction, that is, the optical lens is relatively long, which is disadvantageous to the internal structural design of the electronic device.

[0104] To address the above issues, the embodiments of the present application provide an optical lens that, by optimizing the lens structure, can reduce the size of the optical lens in the Z-axis direction while achieving normal optical image stabilization. That is, it can reduce the length of the optical lens, bringing convenience to the internal structural design of the electronic device. Because the optical lens provided in the embodiments of the present application is relatively small in the Z-axis direction, the layout space for other components inside the electronic device is expanded, the internal structure of the electronic device is effectively optimized, and the difficulty of the internal structural design and layout of the electronic device is reduced. This is conducive to the miniaturization and lightweight design of the electronic device, which can improve the user experience.

[0105] The following first introduces the electronic device with the above-mentioned optical lens with reference to the accompanying drawings. The electronic device can be, for example, a mobile phone, a tablet computer, a laptop computer, a television, a vehicle-mounted device, a wearable device, a video camera, a camera, a video surveillance device, or other electronic products with a photo or video recording function. The mobile phone can be, for example, a conventional straight-plate mobile phone, or a foldable mobile phone, for example, a small folding mobile phone up and down, a folding mobile phone left and right, or a folding mobile phone left and right. The wearable device can be, for example, a smart bracelet, a smart watch, a wireless headset, augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses, or a VR helmet, etc. The embodiment of the present application is described by taking the electronic device as a mobile phone as an example.

[0106] Figure 5 is a structural diagram of an electronic device 1000 provided in an embodiment of the present application, wherein part (a) and part (b) in Figure 5 are a front view and a back view of the electronic device 1000, respectively. As shown in Figure 5, the electronic device 1000 includes a camera module 100, a back cover 200, a display screen 300, a frame 400, and an image processor (not shown) located inside the device. The back cover 200 and the display screen 300 are fixed to the two sides of the frame 400 in reverse, and the back cover 200, the display screen 300 and the frame 400 together enclose the entire inner cavity of the electronic device 1000. Among them, the display screen 300 can be used to display images and can also integrate touch functions to achieve human-computer interaction. The camera module 100 is housed in the entire inner cavity, and the camera group 100 is used to collect optical information outside the electronic device 1000 and form a corresponding image signal. The image processor is connected to the camera module 100 for communication, and the image processor is used to obtain image signals from the camera module 100 and process the image signals. The communication connection between the camera module 100 and the image processor may include data transmission through electrical connection methods such as wiring, or data transmission may be achieved through coupling, etc. It is understandable that the camera module 100 and the image processor may also achieve communication connection through other methods that can achieve data transmission.

[0107] In the embodiment of the present application, the back cover 200 may be provided with a camera hole, through which the camera module 100 collects light, and the camera module 100 may serve as the rear camera of the electronic device 1000. For example, the back cover 200 may include a light-transmitting lens, which is mounted in the camera hole to allow light to pass through and is dust-proof and waterproof. In some cases, the light-transmitting lens may also be considered as part of the camera module 100.

[0108] In other embodiments, the camera module 100 can also serve as a front camera for the electronic device 1000. For example, the display screen 300 can be provided with a light-transmitting area, and the camera module 100 can collect optical information outside the electronic device 1000 through the light-transmitting area. In other words, the camera module 100 can serve as either a front camera module or a rear camera module for the electronic device 1000, and this is not strictly limited in the embodiments of the present application.

[0109] As shown in part (b) of Figure 5 , the camera module 100 can be installed in the middle portion of the upper portion of the electronic device 1000. In other implementations, the camera module 100 can also be set at the left or right end of the upper portion. This application does not strictly limit the installation position of the camera module 100.

[0110] Optionally, the electronic device 1000 may further include an analog-to-digital converter (also referred to as an A / D converter, not shown). The analog-to-digital converter is connected between the camera module 100 and the image processor 20. The analog-to-digital converter is used to convert the analog image signal generated by the camera module 10 into a digital image signal and transmit it to the image processor 20. The image processor 20 then processes the digital image signal to obtain a processed image signal, which can be displayed as an image or video on the display screen.

[0111] Optionally, the electronic device 1000 may further include a memory (not shown) that is communicatively connected to the image processor. The image processor transmits the processed image signal to the memory so that the processed image signal can be retrieved from the memory and displayed on the display screen at any time when the image is needed. In some embodiments, the image processor also compresses the processed image signal before storing it in the memory to save memory space.

[0112] Optionally, the camera module 100 may include one, two, three, four or more lenses. For example, the camera module 100 may include two lenses, one of which is a main camera lens and the other is a telephoto lens. For another example, the camera module 100 may also include three lenses, the first of which is a main camera lens, the second is a telephoto lens, and the last one is a secondary camera lens, an ultra-wide-angle lens, a macro lens or a depth of field lens. For another example, the camera module 100 may also include four lenses, one of which is a main camera lens, the second is a telephoto lens, the third is an ultra-wide-angle lens, and the last one is a macro lens.

[0113] FIG6 is a structural diagram of a camera module 100 provided in the first embodiment of the present application. As shown in FIG6 , the camera module 100 in the embodiment of the present application includes an optical lens 10 and an image sensor 20 .

[0114] Among them, the image sensor 20 is located on the image side of the optical lens 10. The camera module 100 may also include a circuit board (not shown in the figure), and the image sensor 20 may be arranged on the circuit board. Light can pass through the optical lens 10 and illuminate the image sensor 20. Exemplarily, the working principle of the camera module 100 is as follows: the light reflected by the photographed scene generates an optical image through the optical lens 10 and is projected onto the image sensor 20. The image sensor 20 converts the optical image into an electrical signal, that is, an analog image signal and transmits it to the analog-to-digital converter, so as to be converted into a digital image signal through the analog-to-digital converter and sent to the image processor.

[0115] Image sensor 20 (also known as a photosensitive element) is a semiconductor chip with hundreds of thousands to millions of photodiodes on its surface. When exposed to light, these diodes generate an electrical charge. Image sensor 20 can be a charge-coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS). A CCD is made of a highly sensitive semiconductor material that converts light into electrical charge. A CCD consists of many photosensitive units, typically measured in megapixels. When light strikes the surface of a CCD, each photosensitive unit reflects an electrical charge on the component. The signals generated by all the photosensitive units are combined to form a complete image. CMOS is primarily a semiconductor made of silicon and germanium, with both N- and P-pole semiconductors coexisting on the CCD. The current generated by these two complementary effects can be recorded and interpreted as an image by the processing chip.

[0116] In some embodiments, the image sensor 20 can be moved to perform shake compensation, thereby achieving optical image stabilization. For example, the image sensor 20 can translate in a plane perpendicular to the Z axis or rotate relative to the Z axis to achieve the X / Y / Roll axis image stabilization described in Figure 2. In this case, the image sensor 20 has no Z-axis motion capability, or has a very small travel range far less than the focus range to reduce module thickness. In other embodiments, the image sensor 20 can also be a fixed component and cannot perform shake compensation.

[0117] The optical lens 10 primarily utilizes the principle of lens refraction to create an image. That is, light from a scene passes through the optical lens 10, forming a clear image on an imaging surface. The image of the scene is then recorded by the image sensor 20 located on the imaging surface. For example, the optical lens 10 may be a telephoto lens, such as a periscope telephoto lens. When the optical lens 10 is focused on an object at a distance greater than 100 meters, i.e., at a distant view or at infinity, the field of view (FOV) of the optical lens 10 is less than 60°. For example, the field of view (FOV) may be 30°, 35°, 45°, 50°, 54°, or 58°, but is not limited thereto. Furthermore, the image height (ImgH) of the optical lens 10 is greater than 2 mm, i.e., the diagonal dimension of the image sensor of the optical lens 10 (e.g., image sensor 20) is greater than 4 mm. For example, the diagonal dimension of the image sensor of the optical lens 10 may be 5 mm, 6 mm, or 8 mm. In the present application, the optical lens 10 has a smaller field of view angle and a larger sensor panel size, so as to have a stronger long-range shooting capability and high imaging quality in the long-range shooting.

[0118] As shown in Figure 6, the camera module 100 in the embodiment of the present application also includes a filter 30. The filter 30 can be located between the optical lens 10 and the image sensor 20 to filter out unnecessary wavelengths in the light and prevent the image sensor 20 from generating false colors or ripples to improve its effective resolution and color reproduction. Exemplarily, the filter 30 can be an infrared filter, such as an infrared radiation-cut filter (IRCF). The filter 30 in this embodiment is an independent component located between the optical lens 10 and the image sensor 20. In other embodiments, the filter 30 can be set at any position before the image sensor 20, or the filter 30 can be eliminated. Instead, at least one optical element of the optical lens 10 is subjected to surface treatment or material treatment to achieve filtering. This application does not strictly limit the specific embodiments of the structural member or structure used to achieve filtering.

[0119] Optionally, the infrared filter may be realized by evaporating an infrared (IR) material coating on a blue crystal substrate.

[0120] Optionally, the infrared filter may be a white glass filter or a blue glass filter.

[0121] The following describes the structural details of the optical lens 10 in conjunction with the accompanying drawings. As shown in Figure 6, in this embodiment, the optical lens 10 includes a front lens group, a first reflector 18, and a rear lens group, arranged in sequence from the object side to the image side. The first reflector 18 is used to reflect light from the front lens group to the rear lens group. The front lens group is a fixed lens group, and the first reflector 18 is rotatably configured within the lens to achieve optical image stabilization.

[0122] The optical lens 10 provided in the embodiment of the present application has a front lens group disposed on the object side of the first reflector 18. The front lens group includes at least one lens. In other words, some of the lenses of the optical lens 10 can be disposed on the object side of the first reflector 18, rather than all of them being disposed on the image side of the first reflector 18. As the number of lenses disposed on the image side of the optical lens 10 is reduced, the size of the optical lens 10 in the Z-axis direction, i.e., the length of the optical lens 10, can be reduced. This further expands the space for arranging other components within the electronic device 1000, effectively optimizing the internal structure of the electronic device, reducing the difficulty of structural design and layout within the electronic device, and facilitating the miniaturization and thinness of the electronic device, thereby improving the user experience.

[0123] The first reflector 18 is used to reflect the light from the front lens group to the rear lens group, so that the optical lens 10 can achieve a periscope structural layout. The first reflector 18 is rotatably configured in the lens and can rotate under the drive of the anti-shake motor, thereby achieving optical image stabilization and improving the shooting quality of the optical lens 10. Since the front lens group is a fixed lens group, the anti-shake motor only needs to drive the first reflector 18 when performing optical image stabilization, and does not need to drive the front lens group and the rear lens group. The moving parts of the optical image stabilization can be simplified, so that the workload of the anti-shake motor is small, the design requirements of the motor are reduced, and the design of the anti-shake motor and the camera module becomes easier. Since the lens does not participate in shake compensation, the number of movable lenses can be reduced, so that more lenses can be fixed on the optical path, and the relative positions of more lenses become fixed, thereby reducing the influence of tolerance on the imaging point and improving imaging stability. As a result, the optical lens 10 provided in the embodiment of the present application has good imaging quality and high imaging clarity.

[0124] The optical lens 10 provided in the embodiment of the present application optimizes its lens structure to achieve normal optical image stabilization while reducing its size in the Z-axis direction. This reduces the length of the optical lens, facilitating the internal structural design of electronic devices. The optical lens 10 also facilitates the design of image stabilization motors and camera modules, and provides excellent imaging quality.

[0125] FIG7 is a control principle diagram of optical image stabilization of an electronic device 1000 provided in an embodiment of the present application. As shown in FIG7 , the electronic device 1000 further includes a posture sensor 500 and a processing unit 600. The posture sensor 500 is used to collect jitter information of the electronic device 1000 and send the jitter information to the processing unit 600. The processing unit 600 is used to control the image stabilization motor 40 of the camera module 100 based on the jitter information so that the image stabilization motor 40 can drive the first reflector 18 to rotate to achieve optical image stabilization.

[0126] Furthermore, the processing unit 600 can control the anti-shake motor 40 through the drive unit 41 of the anti-shake motor 40. The processing unit 600 can be, for example, an anti-shake chip, or any processor or controller for performing anti-shake calculations. The drive unit 41 can be, for example, a drive circuit or a drive chip. In this case, the processing unit 600 can calculate the jitter compensation information (e.g., the displacement of the reverse motion) of the first reflector 18 based on the jitter information, and send the jitter compensation information to the drive unit 41. The drive unit 41 controls the anti-shake motor 40 based on the jitter compensation information, for example, controlling the magnitude and / or direction of the drive current of the anti-shake motor 40, so that the anti-shake motor 40 drives the first reflector 18 to perform jitter compensation.

[0127] Optionally, the posture sensor 500 includes but is not limited to a gyroscope, an accelerometer, an inertial sensor, a Hall sensor, or a magnetic encoder, etc. For example, the posture sensor 500 may be a micro electro mechanical system (MEMS) gyroscope.

[0128] Optionally, the anti-shake motor 40 may be any one of a voice coil motor, a piezoelectric motor (piezomotor), a shape memory alloy (SMA) motor, a MEMS motor, a suspended wire motor, and a ball motor.

[0129] For example, the anti-shake motor 40 may be a voice coil motor. In this case, the anti-shake motor 40 may include three parts: a fixed component, a movable component, and an actuator. The fixed component has a space for accommodating the movable component; the movable component is movably mounted on the fixed component to securely mount the first reflector 18; and the actuator is used to drive the movable component to rotate, thereby driving the first reflector 18 to rotate, to perform shake compensation.

[0130] The actuator usually includes a combination of a coil and a magnet. The coil and the magnet can be fixed on the fixed part and the movable part respectively, and the two can be arranged in parallel. By connecting direct current to the coil, a driving force can be provided to the magnet. By changing the magnitude and direction of the direct current of the coil, the magnitude and direction of the force on the magnet covered by the magnetic field can be controlled. The magnet can provide the driving force to the movable part to drive the movable part to rotate, and the movable part further drives the first reflector 18 to rotate, thereby achieving the function of jitter compensation.

[0131] Optionally, in order to achieve closed-loop control, the anti-shake motor 40 may also include a position detection sensor, which is used to detect the real-time position information of the moving part and send the real-time position information to the drive unit 41. The drive unit 41 controls the coil according to the real-time position information, such as increasing or decreasing the current of the coil, and changing the direction of the current.

[0132] Optionally, the position detection sensor may be a Hall sensor or a magnetoresistive (MR) sensor.

[0133] As shown in FIG6 , the first reflector 18 is configured to rotate about a rotation point P1. That is, driven by the anti-shake motor 40, the first reflector 18 can rotate about the rotation point P1. The rotation point P1 can be located inside or outside the first reflector 18. The rotation point P1 can be located on or near the optical axis. For example, the projection distance of the rotation point P1 on the optical axis is 0 to 3 mm, for example, 0.5 mm, 1.2 mm, 1.8 mm, or 2.5 mm.

[0134] As shown in FIG6 , in this embodiment, the first reflector 18 is a mirror. The optical axis can be divided into an incident optical axis OA2 and an outgoing optical axis OA1, with the center point P2 of the reflective surface of the first reflector 18 as the boundary. That is, the optical axis on the object side of the center point P2 of the reflective surface of the first reflector 18 is the incident optical axis OA2, and the optical axis on the image side of the center point P2 of the reflective surface of the first reflector 18 is the outgoing optical axis OA1. The rotation point P1 can be located on the incident optical axis OA2 or the outgoing optical axis OA1, or can be adjacent to the incident optical axis OA2 or the outgoing optical axis OA1. For example, the projection distance of the rotation point P1 on the incident optical axis OA2 or the outgoing optical axis OA1 is 0 to 3 mm, such as 0.6 mm, 1.5 mm, 2.0 mm, or 2.4 mm. In some cases, the rotation point P1 can also coincide with the center point P2.

[0135] As shown in FIG. 6 , in this embodiment, the rotation point P1 is located on the emergent optical axis OA1 , that is, the rotation point P1 is located on the image side of the center point P2 .

[0136] FIG8 is a schematic diagram illustrating two different configurations of the rotation point P1 of the first reflector 18. As shown in part (a) of FIG8 , the projection point P3 of the rotation point P1 on the line containing the outgoing optical axis OA1 is located on the outgoing optical axis OA1. The line containing the outgoing optical axis OA1 is a line parallel to the Z axis. The projection point (e.g., the orthographic projection point) of the rotation point P1 is located on the outgoing optical axis OA1, indicating that the rotation point P1 is located on the image side of the center point P2. As a possible implementation, as shown in FIG6 , the rotation point P1 is located on the outgoing optical axis OA1. In this case, the projection point of the rotation point P1 on the line containing the outgoing optical axis OA1 is itself. In this case, the rotation point P1 and the projection point P3 are the same point, and the projection point P3 is the rotation point P1.

[0137] As shown in part (b) of Figure 8 , the projection point P3 of the rotation point P1 on the line containing the outgoing optical axis OA1 is located on the reverse extension line of the outgoing optical axis OA1. The line containing the outgoing optical axis OA1 is a line parallel to the Z-axis. The projection point (e.g., the positive projection point) of the rotation point P1 is located on the reverse extension line of the outgoing optical axis OA1, which means that the rotation point P1 is located on the back side of the center point P2. The back side and the image side of the center point P2 are two sides opposite or facing away from the center point P2. For example, the back side is to the left of the center point P2 in Figure 8 , and the image side is to the right of the center point P2 in Figure 8 . As a possible implementation, the rotation point P1 is located on the reverse extension line of the outgoing optical axis OA1. In this case, the projection point of the rotation point P1 on the line containing the outgoing optical axis OA1 is itself. In this case, the rotation point P1 and the projection point P3 are the same point, and the projection point P3 is the rotation point P1. Furthermore, on this basis, the distance L between the projection point P3 and the center point P2 and the effective focal length EFL of the optical lens 10 satisfy: L / EFL≤2.0.

[0138] The embodiment of the present application ensures the integrity of the optical path by making a reasonable selection of the position of the rotation point P1 as described above, so that when the first reflector 18 rotates to different positions, it can ensure that the light is reliably reflected to the rear lens group, reducing or avoiding light loss caused by anti-shake, and ensuring that the position differences of the light reaching each lens are small. The present application can ensure that the amount of light reflected by the first reflector 18 into the rear lens group in different anti-shake states (i.e., different positions) does not produce a large difference, that is, it can ensure that the image clarity does not produce a large difference in different anti-shake states, ensuring that the optical lens 10 always has good imaging quality.

[0139] FIG9 is a schematic diagram illustrating how the rotation point P1 of the first reflector 18 is formed. As shown in FIG9 , the first reflector 18 can be configured to rotate about multiple rotation axes (e.g., two, three, or four, etc.), with the intersection of these multiple rotation axes constituting the rotation point P1 in the embodiment of the present application. For example, driven by the anti-shake motor 40, the first reflector 18 can rotate about the first rotation axis S1 in FIG9 , and can also rotate about the second rotation axis S2 in FIG9 , with the intersection of the first rotation axis S1 and the second rotation axis S2 constituting the rotation point P1.

[0140] Furthermore, in this embodiment, the first rotation axis S1 may be a yaw axis parallel to the Y-axis, and the first reflector 18 is configured to perform yaw-axis anti-shake. That is, when driven by the anti-shake motor 40, the first reflector 18 performs a panning motion around the first rotation axis S1. The second rotation axis S2 may be a pitch axis parallel to the X-axis, and the first reflector 18 is configured to perform pitch-axis anti-shake. That is, when driven by the anti-shake motor 40, the first reflector 18 performs a nodding motion or a tilting motion around the second rotation axis S2. In this case, the rotation point P1 is the intersection of the pitch and yaw axes.

[0141] The structural details of the optical lens 10 provided in the embodiment of the present application will be further introduced below with reference to the accompanying drawings.

[0142] As shown in FIG6 , the front lens group is located on the object side of the first reflector 18 and is used to receive external light. The front lens group includes at least one lens, such as the first lens 11. In addition, the front lens group may also include two, three, or more lenses depending on specific imaging requirements.

[0143] As shown in Figure 6, the first reflector 18 is located between the front lens group and the rear lens group, and is used to reflect (deflect) light from the front lens group to the rear lens group. Because the first reflector 18 can change the propagation direction of light, the optical axis direction of the optical lens 10 can be different from the direction of external light entering the electronic device 1000, allowing the optical lens 10 to achieve a periscope structural layout, thereby making the placement and angle of the optical lens 10 more flexible.

[0144] In this embodiment, the first reflective element 18 is a reflective mirror. In other embodiments, the first reflective element 18 may also be a prism, such as a right-angle prism.

[0145] Optionally, the reflective surface of the first reflective element 18 may be a metal reflective film layer prepared by evaporation or sputtering, and the metal may be nickel, aluminum, silver, gold, or alloys thereof.

[0146] Optionally, a high-reflection film layer design may be adopted, and a high-reflection film layer may be provided on the reflective surface to improve imaging quality.

[0147] Optionally, considering the optical system's ability to cut off near-infrared and ultraviolet light, the film layer of the reflective surface can be designed to have high reflectivity for visible light (380nm to 780nm) and high transmittance for the ultraviolet band (below 380nm) and the near-infrared band (above 780nm), thereby reducing the amount of non-visible light entering the image sensor 20 and improving the quality of imaging.

[0148] Optionally, the reflectivity of the reflective surface may be required to be above 95% within the visible light bandwidth, with no reflectivity restriction for ultraviolet and near infrared.

[0149] Optionally, the reflective surface of the first reflector 18 can be a flat surface, which offers good processability. Furthermore, the reflective surface of the first reflector 18 can also be a spherical surface (concave or convex), a cylindrical surface (curvature in one direction and a straight line in the other), or a freeform surface. In this case, the reflective surface of the first reflector 18 can correct for astigmatism and aberrations while reflecting light, thereby further improving image quality or reducing volume.

[0150] The rear lens assembly is located on the image side of the first reflector 18 and is used to converge the light reflected from the first reflector 18 and image it on the image sensor 20. The rear lens assembly includes multiple lenses to improve the specifications of the optical lens and enhance the imaging quality. Exemplarily, the rear lens assembly can include two to eight lenses, such as two, four, five, or six lenses.

[0151] In this embodiment, the focal length of the rear lens group is positive. The rear lens group has a large number of lenses. By setting the focal length of the rear lens group to be positive, the rear lens group plays a core imaging role.

[0152] Optionally, the focal length of the front lens group can be positive or negative.

[0153] Optionally, the focal length F1 of the front lens group and the overall focal length Fs of the optical lens 10 satisfy the following relationship: |F1 / Fs|>1.2. That is, the absolute value of the ratio of F1 to Fs is greater than 1.2. The above arrangement ensures that the amount of light reflected by the first reflector 18 into the rear lens group does not vary significantly under different anti-shake conditions (i.e., different positions). This ensures that image clarity does not vary significantly under different anti-shake conditions, ensuring that the optical lens 10 consistently maintains excellent image quality.

[0154] As shown in FIG6 , in this embodiment, the rear lens group includes a second lens 12 , a third lens 13 , a fourth lens 14 , a fifth lens 15 , a sixth lens 16 and a seventh lens 17 arranged in sequence from the object side to the image side.

[0155] Optionally, the optical lens 10 may include three to ten lenses, such as four, seven, or eight lenses. Depending on the actual optical design requirements, at least one of the multiple lenses may be disposed on the object side of the first reflector 18 to form a front lens group, and the remaining lenses may be disposed on the image side of the first reflector 18 to form a rear lens group.

[0156] Optionally, the multiple lenses of the optical lens 10 can be made of the same material, such as glass, resin, etc. Glass has a high refractive index and low expansion properties, which enables the optical lens 10 to have better imaging quality and low-temperature drift characteristics. The low density of resin can reduce the weight of the lens group, facilitate movement, and improve the focusing ability of the optical lens 10. In other embodiments, at least one of the multiple lenses of the optical lens 10 is made of a different material from the other lenses, which is not limited in this application.

[0157] Optionally, the multiple lenses of the optical lens 10 can be formed by injection molding, molding and / or polishing and grinding.

[0158] Optionally, the optical surface of at least one lens of the optical lens 10 is aspherical. This aspherical optical surface has varying optical powers from the paraxial region to the outer field of view, resulting in more balanced image quality. Alternatively, the optical surface of at least one lens of the optical lens 10 may be a freeform surface to correct for aberrations. An aspherical surface is a surface that is rotationally symmetrical about the optical axis. A freeform surface may have no axis of symmetry, be symmetrical along a particular direction, or be symmetrical along two directions.

[0159] Optionally, the multiple lenses of the optical lens 10 are assembled through an active alignment (AA) process to ensure assembly accuracy.

[0160] Optionally, a diffraction grating structure may be formed on the optical surface of at least one lens of the optical lens 10. By properly setting the diffraction grating structure, chromatic aberration can be reduced and the volume of the optical lens 10 can also be reduced.

[0161] Optionally, the optical lens 10 may further include a liquid lens (not shown) to enhance the focusing effect and achieve ultra-close-up photography. A liquid lens is a structural component that uses liquid as a lens and changes the focal length by changing the curvature of the liquid.

[0162] Optionally, at least one lens of the optical lens 10 can be formed using special-shaped technology to reduce the size of the optical lens 10, making the optical lens 10 more suitable for miniaturized electronic devices 1000 and increasing the scope of application of the optical lens 10. The incision can be achieved through the I-CUT process. In addition, since the height of the lens is reduced by the incision, the lens can be provided with a larger light-transmitting aperture, thereby increasing the amount of light passing through the optical lens 10 and improving the imaging quality of the optical lens 10. Among them, special-shaped technology can also be used on the structural support members of the lens, such as the lens barrel and spacers, to reduce the size of the optical lens 10.

[0163] Optionally, the peripheral side surface or supporting surface of at least one lens of the optical lens 10 can be blackened or roughened to eliminate stray light and improve image quality. The blackening treatment can be applied or plated with a matte material such as black ink, or a film. The roughening treatment is mainly used to increase the roughness.

[0164] As shown in Figure 6, the rear lens group includes a first lens group G1 and a second lens group G2, arranged sequentially from the object side to the image side. The first lens group G1 includes at least one lens, for example, two, three, four, or more lenses, and the second lens group G2 includes at least one lens, for example, two, three, four, or more lenses. In this embodiment, the first lens group G1 includes a second lens 12, a third lens 13, and a fourth lens 14, and the second lens group G2 includes a fifth lens 15, a sixth lens 16, and a seventh lens 17.

[0165] Optionally, the focal length of the first lens group G1 is positive, and the focal length of the second lens group G2 is negative. Through the above arrangement, the optical lens 10 can achieve better macro shooting performance.

[0166] Optionally, the first lens group G1 includes at least two lenses (i.e., two lenses), at least one of which has an Abbe number less than 45, and the second lens group G2 includes at least one lens. Through the above arrangement, the optical lens 10 can achieve better macro shooting performance and balance various aberrations, thereby improving image quality.

[0167] As shown in FIG6 , when the optical lens system 10 switches from a telephoto focus to a near focus, the distance between the first lens group G1 and the second lens group G2 increases. Conversely, when the optical lens system 10 switches from a near focus to a telephoto focus, the distance between the first lens group G1 and the second lens group G2 decreases. Therefore, when the optical lens system 10 switches from a telephoto focus to a near focus, the distance between the first lens group G1 and the second lens group G2 changes.

[0168] In the present application, by changing the distance between the first lens group G1 and the second lens group G2, the optical lens 10 can achieve long-distance shooting with high imaging quality, and also have strong close-up shooting capabilities, realizing wide object distance imaging from long-range to close-range.

[0169] In the embodiment of the present application, the first lens group G1 is a focusing lens group, and the second lens group G2 is a fixed lens group. The first lens group G1 can move along the optical axis (e.g., the output optical axis OA1) to achieve the above-mentioned focusing process. This embodiment adopts a single-group focusing method, which can simplify the movement of the focusing structure of the optical lens 10, thereby simplifying the focusing method.

[0170] Figure 10 is a schematic diagram of the optical path of the camera module 100 provided in the first embodiment of the present application when focusing on a distant view. Figure 11 is a schematic diagram of the optical path of the camera module provided in the first embodiment of the present application when focusing on a close view.

[0171] As shown in Figure 10, when the optical lens 10 is focused on the distant view (infinity), the first lens group G1 moves along the optical axis toward the image side, and the light reflected by the distant view object passes through the optical lens 10 and is imaged on the imaging surface of the image sensor 20, so that the camera module 100 can capture distant view images. As shown in Figure 11, when the optical lens 10 is focused on the near view, the first lens group G1 moves along the optical axis toward the object side, and the light reflected by the near view object passes through the optical lens 10 and is imaged on the imaging surface of the image sensor 20, so that the camera module 10 can capture near view images.

[0172] As shown in Figures 10 and 11 , when the optical lens system 10 switches from a distant view to a near view, the first lens group G1 moves along the optical axis toward the object side, while the second lens group G2 remains stationary. The distance between the first lens group G1 and the second lens group G2 increases, and the effective focal length EFL of the optical lens system 10 decreases. Furthermore, the distance between the first lens group G1 and the image sensor 20 increases, while the distance between the second lens group G2 and the image sensor 20 remains unchanged.

[0173] This embodiment focuses by moving the first lens group G1 and fixing the second lens group G2, so that when focusing on a close-up, the object side of the optical lens 10 is closer to the subject, the degree of light deflection is small, the aberration is reduced, and the imaging quality is improved.

[0174] Optionally, the first lens group G1 may be driven to move along the optical axis by a focus motor, thereby achieving the aforementioned focusing process. The focus motor may be, for example, a voice coil motor, a piezoelectric motor, a shape memory alloy motor, or a stepping motor.

[0175] As shown in Figures 6, 10, and 11, the optical lens 10 may further include an aperture stop 19, which may be mounted on the first lens group G1. In this case, the aperture stop 19 provides a more effective aperture adjustment effect, thereby improving the imaging quality of the optical lens 10. For example, the aperture stop 19 may be mounted on the object-side end of the first lens group G1. Furthermore, the aperture stop 19 may also be mounted on other lenses of the first lens group G1, the second lens group G2, the front lens group, or other locations on the optical lens 10, although this is not strictly limited in the present embodiments.

[0176] Aperture diaphragm 19 can be a spacer ring structure or a variable fan blade structure; alternatively, aperture diaphragm 19 can be formed through a surface spraying process, for example, by spraying a light-shielding material onto a lens to form aperture diaphragm 19. The position of aperture diaphragm 19 can be fixed or variable. For example, the position of aperture diaphragm 19 can be variable, and aperture diaphragm 19 can be adjusted based on the focus condition to be positioned between different lenses.

[0177] The following combines data and simulation results to present a possible embodiment of the optical lens 10 shown in FIG. 6 .

[0178] Please refer to Table 1a and Table 1b. Table 1a shows the radius of curvature, thickness, refractive index (Nd), and Abbe number of each lens, first reflector 18, aperture stop 19, and filter 30 for a possible embodiment of the optical lens 10 shown in Figure 6 when focusing on a distant scene. The thickness includes both the thickness of the lens itself and the distance between lenses. Table 1b shows the aspheric coefficients of each lens in a possible embodiment of the optical lens 10 shown in Figure 6.

[0179] Table 1a:

[0180] Table 1b:

[0181] The aspheric surface of the telephoto lens 10 in Table 1a can be defined using, but not limited to, the following aspheric surface curve equation:

[0182] Where z is the relative distance between a point on the aspheric surface and the intersection of the point r from the optical axis; r is the vertical distance between the point on the aspheric curve and the optical axis; c is the curvature; k is the cone coefficient; α i is the i-th order aspheric coefficient, which can be found in Table 1b.

[0183] Table 1c:

[0184] Table 1c provides other parameter information for the optical lens 10, including, for example, the overall focal length Fs, aperture value Fno, field of view FOV, focal length F1 of the front lens group (i.e., first lens 11), and the ratio of F1 to Fs. Specifically, F1 / Fs is 4.385 (greater than the aforementioned threshold of 1.2), ensuring that the amount of light reflected by the first reflector 18 into the rear lens group does not vary significantly under different anti-shake conditions (i.e., different positions). This ensures that image clarity does not vary significantly under different anti-shake conditions, ensuring that the optical lens 10 consistently maintains excellent image quality.

[0185] In this embodiment, when the optical lens 10 switches from a distant view to a near view, for example, switches to focusing on a near view of 60 mm, the first lens group G1 moves toward the object side, and the distance between the first lens group G1 and the second lens group G2 increases by 2.2 mm. That is, the focusing stroke of the first lens group G1 moving toward the object side is 2.2 mm. Compared with conventional lenses (usually requiring more than 4 mm), the focusing stroke is significantly shortened, and the focusing capability is strong.

[0186] Please refer to FIG. 12 and FIG. 13 , FIG. 12 is a simulation effect diagram of the optical lens 10 shown in FIG. 10 when focusing on a distant view, and FIG. 13 is a simulation effect diagram of the optical lens 10 shown in FIG. 11 when focusing on a close view of 60 mm.

[0187] Figures 12 and 13 both include axial chromatic aberration curves, astigmatism field curvature diagrams, and distortion diagrams for the optical lens 10. The axial chromatic aberration curves include spherical aberration curves corresponding to different wavelengths of the system (shown as 650nm, 610nm, 555nm, 510nm, and 470nm). Their physical meaning is the deviation of light of corresponding wavelengths emitted at a 0-degree field of view from the ideal image point after passing through the optical system. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the normalized coordinate (height) at the pupil. The values ​​shown in Figures 12 and 13 are both relatively small, indicating that the optical lens 10 has well-corrected axial aberrations (spherical aberration, chromatic aberration, etc.) when focusing on distant and near scenes. The astigmatism field curvature diagrams illustrate the deviation of the convergence point of fine beams of light from the ideal imaging plane at different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the corresponding field of view. When a field of view value is too large, the image quality in that field is poor or high-level aberrations are present. Figures 12 and 13 show that field curvature is minimal in both directions, indicating a good depth of focus. Distortion diagrams are used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height for different fields of view. The minimal distortion shown in Figures 12 and 13 ensures that the image is not noticeably distorted.

[0188] FIG14 is a schematic diagram of the structure of the camera module 100 provided in Example 2 of the present application. As shown in FIG14 , in this embodiment, the rear lens group of the optical lens 10 is configured to move as a whole along the output optical axis OA1 to achieve autofocus. For example, the rear lens group includes six lenses, namely, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, and a seventh lens 17, arranged in sequence from the object side to the image side. The positions of these six lenses are relatively fixed, and the focus motor can simultaneously drive these six lenses to move as a whole toward the object side or toward the image side on the output optical axis OA1 to achieve autofocus.

[0189] Furthermore, in this embodiment, the optical lens 10 further includes a second reflector 21 located on the image side of the rear lens group. The second reflector 21 is used to reflect or deflect light from the rear lens group to the image sensor 20 .

[0190] This embodiment uses two reflectors to deflect the propagation angle of light, allowing for flexible adjustment of the placement of the image sensor 20 to achieve better space utilization. The light can be deflected 180 degrees, allowing the plane of the image sensor 20 to be parallel to the display screen 300 of the electronic device 1000. This frees the placement of the image sensor 20 from the thickness of the electronic device 1000, allowing for a larger image sensor to be installed, thereby improving imaging quality.

[0191] Optionally, the second reflector 21 may be a reflector or a prism.

[0192] The following combines data and simulation results to present a concrete solution of the optical lens 10 shown in FIG. 14 in a possible embodiment.

[0193] Please refer to Tables 2a and 2b. Table 2a shows the radius of curvature, thickness, refractive index (Nd), and Abbe number of each lens, first reflector 18, aperture stop 19, and filter 30 when focusing on a distant view in one possible embodiment of the optical lens 10 shown in Figure 14. The thickness includes the thickness of the lens itself and the distance between lenses. Virtual surfaces are imaginary surfaces used to facilitate optical design. Table 2b shows the aspheric coefficients of each lens in one possible embodiment of the optical lens 10 shown in Figure 14.

[0194] Table 2a:

[0195] Table 2b:

[0196] The aspheric surface of the telephoto lens 10 in Table 2a can be defined using, but not limited to, the following aspheric surface curve equation:

[0197] Where z is the relative distance between a point on the aspheric surface and the intersection of the point r from the optical axis; r is the vertical distance between the point on the aspheric curve and the optical axis; c is the curvature; k is the cone coefficient; α i is the i-th order aspheric coefficient, which can be found in Table 2b.

[0198] Table 2c:

[0199] Table 2c provides other parameters of the optical lens 10, including, for example, the overall focal length Fs, aperture value Fno, field of view FOV, focal length F1 of the front lens group (i.e., first lens 11), and the ratio of F1 to Fs. F1 / Fs is 2.299 (greater than the aforementioned threshold of 1.2), ensuring that the amount of light reflected by the first reflector 18 into the rear lens group does not vary significantly under different anti-shake conditions (i.e., different positions). This ensures that image clarity does not vary significantly under different anti-shake conditions, ensuring that the optical lens 10 consistently maintains excellent image quality.

[0200] Please refer to FIG. 15 , which is a simulation diagram of the optical lens 10 shown in FIG. 14 when focusing on a distant view.

[0201] Figure 15 includes axial chromatic aberration curves, astigmatism field curvature plots, and distortion plots for the optical lens 10. The axial chromatic aberration curves include spherical aberration curves corresponding to different wavelengths of the system (shown as 650nm, 610nm, 555nm, 510nm, and 470nm). Their physical meaning is the deviation of light of corresponding wavelengths emitted at a 0-degree field of view from the ideal image point after passing through the optical system. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the normalized coordinate (height) at the pupil. The values ​​shown in Figure 15 are all small, indicating that when focusing on a distant view, the optical lens 10 has well corrected axial aberrations (spherical aberration, chromatic aberration, etc.). The astigmatism field curvature plots illustrate the deviation of the convergence point of fine beams of light from the ideal imaging plane for different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the corresponding field of view. When the field of view value is too large, the image quality in that field of view is poor or high-order aberrations are present. Figure 15 shows that field curvature is minimal in both directions, indicating a good depth of focus. Distortion plots are used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height for different fields of view. The minimal distortion shown in Figure 15 ensures that the image is not noticeably distorted.

[0202] Figure 16 is a schematic diagram of the structure of the camera module 100 provided in the third embodiment of the present application when focusing on a distant view. Figure 17 is a schematic diagram of the structure of the camera module 100 provided in the third embodiment of the present application when focusing on a close view. Compared with the aforementioned first embodiment, this embodiment performs autofocus by moving the second lens group G2.

[0203] In the embodiment of the present application, the first lens group G1 is a fixed lens group, and the second lens group G2 is a focusing lens group. The second lens group G2 is capable of moving along the optical axis (e.g., the output optical axis OA1) to achieve the focusing process. This embodiment adopts a single-group focusing method, which can simplify the movement of the focusing structure of the optical lens 10, thereby simplifying the focusing method.

[0204] As shown in Figure 16, when the optical lens 10 is focused on a distant view, the light reflected by the distant object passes through the optical lens 10 and forms an image on the imaging surface of the image sensor 20, and the camera module 100 can capture distant images. As shown in Figure 17, when the optical lens 10 is focused on a near view, the second lens group G2 moves along the optical axis toward the image side, and the light reflected by the near view object passes through the optical lens 10 and forms an image on the imaging surface of the image sensor 20, and the camera module 10 can capture near view images.

[0205] As shown in Figures 16 and 17 , when the optical lens system 10 switches from a distant view to a near view, the first lens group G1 remains stationary, while the second lens group G2 moves along the optical axis toward the image side. This increases the distance between the first lens group G1 and the second lens group G2, and reduces the effective focal length EFL of the optical lens system 10. Furthermore, the distance between the first lens group G1 and the image sensor 20 remains unchanged, while the distance between the second lens group G2 and the image sensor 20 decreases.

[0206] The following combines data and simulation results to present a concrete solution of the optical lens 10 shown in FIG. 16 in a possible embodiment.

[0207] Please refer to Tables 3a and 3b. Table 3a shows the radius of curvature, thickness, refractive index (Nd), and Abbe number of each lens, first reflector 18, aperture stop 19, and filter 30 when focusing on a distant view in one possible embodiment of the optical lens 10 shown in Figure 16. The thickness includes the thickness of the lens itself and the distance between lenses. Virtual surfaces are imaginary surfaces used to facilitate optical design. Table 3b shows the aspheric coefficients of each lens in one possible embodiment of the optical lens 10 shown in Figure 16.

[0208] Table 3a:

[0209] Table 3b:

[0210] The aspheric surface of the telephoto lens 10 in Table 3a can be defined using, but not limited to, the following aspheric surface curve equation:

[0211] Where z is the relative distance between a point on the aspheric surface and the intersection of the point r from the optical axis; r is the vertical distance between the point on the aspheric curve and the optical axis; c is the curvature; k is the cone coefficient; α i is the i-th order aspheric coefficient, which can be found in Table 3b.

[0212] Table 3c:

[0213] Table 3c provides other parameter information for the optical lens 10, including, for example, the overall focal length Fs, aperture value Fno, field of view FOV, focal length F1 of the front lens group (i.e., first lens 11), and the ratio of F1 to Fs. Specifically, F1 / Fs is 8.396 (greater than the aforementioned threshold of 1.2), ensuring that the amount of light reflected by the first reflector 18 into the rear lens group does not vary significantly under different anti-shake conditions (i.e., different positions). This ensures that image clarity does not vary significantly under different anti-shake conditions, ensuring that the optical lens 10 consistently maintains excellent image quality.

[0214] In this embodiment, when the optical lens 10 switches from a telephoto perspective to a near perspective of 60 mm, the second lens group G2 moves toward the image side, and the distance between the first lens group G1 and the second lens group G2 increases by 2.2 mm. Correspondingly, the distance between the second lens group G2 and the filter 30 decreases by 2.2 mm to keep the height of the optical lens 10 unchanged.

[0215] Please refer to Figures 18 and 19 in combination. Figure 18 is a simulation effect diagram of the optical lens 10 shown in Figure 16 when focusing on a distant view, and Figure 19 is a simulation effect diagram of the optical lens 10 shown in Figure 17 when focusing on a close view of 60 mm.

[0216] Figures 18 and 19 both include axial chromatic aberration curves, astigmatism field curvature diagrams, and distortion diagrams for the optical lens 10. The axial chromatic aberration curves include spherical aberration curves corresponding to different wavelengths of the system (shown as 650nm, 610nm, 555nm, 510nm, and 470nm). Their physical meaning is the deviation of light of the corresponding wavelength emitted at a 0-degree field of view from the ideal image point after passing through the optical system. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the normalized coordinate (height) at the pupil. The values ​​shown in Figures 18 and 19 are both relatively small, indicating that the optical lens 10 has well-corrected axial aberrations (spherical aberration, chromatic aberration, etc.) when focusing on distant and near scenes. The astigmatism field curvature diagrams are used to illustrate the deviation of the convergence point of fine beams of light from the ideal imaging plane at different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the corresponding field of view. When a field of view value is too large, the image quality in that field is poor or high-level aberrations are present. Figures 18 and 19 show that field curvature is minimal in both directions, indicating a good depth of focus. Distortion diagrams are used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height for different fields of view. The minimal distortion shown in Figures 18 and 19 ensures that the image is not noticeably distorted.

[0217] Figure 20 is a schematic diagram of the structure of the camera module 100 provided in the fourth embodiment of the present application when focusing on a distant view. Figure 21 is a schematic diagram of the structure of the camera module 100 provided in the fourth embodiment of the present application when focusing on a close view. Compared to the previous embodiment, in this embodiment, the first reflector 18 is a prism.

[0218] The following combines data and simulation results to present a concrete solution of the optical lens 10 shown in FIG. 20 in a possible embodiment.

[0219] Please refer to Table 4a and Table 4b. Table 4a shows the radius of curvature, thickness, refractive index (Nd), and Abbe number of each lens, first reflector 18, aperture stop 19, and filter 30 when focusing on a distant view in one possible embodiment of the optical lens 10 shown in Figure 20. The thickness includes the thickness of the lens itself and the distance between lenses. Virtual surfaces are imaginary surfaces used to facilitate optical design. Table 4b shows the aspheric coefficients of each lens in one possible embodiment of the optical lens 10 shown in Figure 20.

[0220] Table 4a:

[0221] Table 4b:

[0222] The aspheric surface of the telephoto lens 10 in Table 4a can be defined using, but not limited to, the following aspheric surface curve equation:

[0223] Where z is the relative distance between a point on the aspheric surface and the intersection of the point r from the optical axis; r is the vertical distance between the point on the aspheric curve and the optical axis; c is the curvature; k is the cone coefficient; α i is the i-th order aspheric coefficient, which can be found in Table 4b.

[0224] Table 4c:

[0225] Table 4c provides other parameter information for the optical lens 10, including, for example, the overall focal length Fs, aperture value Fno, field of view FOV, focal length F1 of the front lens group (i.e., first lens 11), and the ratio of F1 to Fs. F1 / Fs is 5.775 (greater than the aforementioned threshold of 1.2), ensuring that the amount of light reflected by the first reflector 18 into the rear lens group does not vary significantly under different anti-shake conditions (i.e., different positions). This ensures that image clarity does not vary significantly under different anti-shake conditions, ensuring that the optical lens 10 consistently maintains excellent image quality.

[0226] In this embodiment, when the optical lens 10 switches from a distant view to a near view, for example, switches to focusing on a near view of 60 mm, the first lens group G1 moves toward the object side, and the distance between the first lens group G1 and the second lens group G2 increases by 2.2 mm. That is, the focusing stroke of the first lens group G1 moving toward the object side is 2.2 mm. Compared with conventional lenses (usually requiring more than 4 mm), the focusing stroke is significantly shortened, and the focusing capability is strong.

[0227] Please refer to Figures 22 and 23 in combination. Figure 22 is a simulation effect diagram of the optical lens 10 shown in Figure 20 when focusing on a distant view, and Figure 23 is a simulation effect diagram of the optical lens 10 shown in Figure 21 when focusing on a close view of 60 mm.

[0228] Figures 22 and 23 both include axial chromatic aberration curves, astigmatism field curvature diagrams, and distortion diagrams for the optical lens 10. The axial chromatic aberration curves include spherical aberration curves corresponding to different wavelengths of the system (shown as 650nm, 610nm, 555nm, 510nm, and 470nm). Their physical meaning is the deviation of light of the corresponding wavelength emitted at a 0-degree field of view from the ideal image point after passing through the optical system. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the normalized coordinate (height) at the pupil. The values ​​shown in Figures 22 and 23 are both relatively small, indicating that the optical lens 10 has well-corrected axial aberrations (spherical aberration, chromatic aberration, etc.) when focusing on distant and near scenes. The astigmatism field curvature diagrams are used to illustrate the deviation of the convergence point of fine beams of light from the ideal imaging plane at different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the corresponding field of view. When a field of view value is too large, the image quality in that field is poor or high-level aberrations are present. Figures 22 and 23 show that field curvature is minimal in both directions, indicating a good depth of focus. Distortion diagrams are used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height for different fields of view. The minimal distortion shown in Figures 22 and 23 ensures that the image is not noticeably distorted.

[0229] 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. An optical lens, characterized in that: include: A front lens group, a first reflector (18), and a rear lens group arranged in sequence from the object side to the image side, wherein the first reflector (18) is used to reflect light from the front lens group to the rear lens group; The front lens group is a fixed lens group, and the first reflector (18) is rotatably arranged in the lens to achieve optical image stabilization.

2. The optical lens according to claim 1, characterized in that: The optical lens has an exit optical axis (OA1) located on the image side of a center point (P2) of the first reflector (18), and the first reflector (18) is configured to rotate around a rotation point (P1); The projection point (P3) of the rotation point (P1) on the straight line where the output optical axis (OA1) is located is located on the output optical axis (OA1); or, The projection point (P3) of the rotation point (P1) on the straight line where the output optical axis (OA1) is located is located on the reverse extension line of the output optical axis (OA1), and the distance L between the projection point (P3) and the center point (P2) and the effective focal length EFL of the optical lens satisfy: L / EFL≤2.

0.

3. The optical lens according to claim 2, characterized in that: The first reflector (18) is configured to perform pitch axis anti-shake and yaw axis anti-shake, and the rotation point (P1) is the intersection of the pitch axis and the yaw axis.

4. The optical lens according to claim 2 or 3, characterized in that: The rear lens group is configured to move as a whole along the output optical axis (OA1) to achieve autofocus.

5. The optical lens according to claim 2 or 3, characterized in that: The rear lens group includes a first lens group (G1) and a second lens group (G2), and the first lens group (G1) or the second lens group (G2) is configured to move along the output optical axis (OA1) to achieve autofocus.

6. The optical lens according to claim 5, characterized in that: The focal length of the first lens group (G1) is positive, and the focal length of the second lens group (G2) is negative.

7. The optical lens according to claim 5 or 6, characterized in that: The first lens group (G1) includes at least two lenses, wherein at least one lens has an Abbe number less than 45, and the second lens group (G2) includes at least one lens.

8. The optical lens according to any one of claims 1 to 7, characterized in that: The focal length F1 of the front lens group and the overall focal length Fs of the optical lens satisfy: |F1 / Fs|>1.

2.

9. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens further comprises a second reflector (21) located on the image side of the rear lens group, and the second reflector (21) is used to deflect light from the rear lens group.

10. The optical lens according to any one of claims 1 to 9, characterized in that: The field of view angle of the optical lens is less than 60°.

11. The optical lens according to any one of claims 1 to 10, characterized in that: The image height of the optical lens is greater than 2 mm.

12. The optical lens according to any one of claims 1 to 11, characterized in that: The focal length of the rear lens group is positive.

13. The optical lens according to any one of claims 1 to 12, characterized in that: The first reflecting element (18) is a reflecting mirror or a prism.

14. A camera module, characterized in that: It comprises an anti-shake motor and an optical lens as claimed in any one of claims 1 to 13, wherein the anti-shake motor is used to drive the first reflector (18) to achieve optical image shaking.

15. An electronic device, characterized in that: It includes a posture sensor, a processing unit and a camera module as described in claim 14, wherein the posture sensor is used to collect jitter information of the electronic device and send the jitter information to the processing unit, and the processing unit is used to control the anti-shake motor according to the jitter information.

Images