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 first lens group (1), a first reflective device (2), a second lens group (3), and a first driving assembly (30). The first driving assembly (30) is used to drive the first lens group (1) and the first reflective device (2) to move, so as to implement shaking prevention of the optical lens (10). The first lens group (1) comprises i lenses, the i lenses of the first lens group (1) and a lens closest to the first reflective device (2) in the second lens group (3) jointly amount to a total of i+1 lenses, and a light bending capability satisfies: [Expression 1], where 1≤n≤ i+1, n is a positive integer, ctn is the center thickness of an n-th lens, and r1n represents the radius of curvature of a first surface of the n-th lens. r2n represents the radius of curvature of a second surface of the n-th lens. The light bending capability of the lenses is set to be small, which helps to balance aberration, and the imaging quality of the optical lens (10) is good.

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 of China on February 7, 2024, with application number: 202410174029.5, and priority to the Chinese patent application entitled “Optical lens, camera module and electronic device”, all 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 cameras in consumer electronics phones, consumers are increasingly demanding longer-distance photography. Telephoto lenses require higher magnification and longer focal lengths to achieve superior imaging for long-distance photography. However, telephoto lenses are relatively large in length, and user hand tremors during photography can cause optical axis jitter, which in turn affects image quality. Therefore, an anti-shake mechanism is required to compensate for this optical axis jitter. Currently, how to combine anti-shake functionality with low cost, compact size, and high image quality in lenses is a key research area for manufacturers. Summary of the Invention

[0004] The present application provides an optical lens, a camera module and an electronic device.

[0005] In a first aspect, an embodiment of the present application provides an optical lens. The optical lens includes a first lens group, a first reflector, and a second lens group arranged from the object side to the image side, the first reflector changes the direction of the optical axis from a first direction to a second direction, and the second direction intersects with the first direction. The optical lens also includes a first drive assembly, which is used to drive the first lens group and the first reflector to move to achieve anti-shake of the optical lens. The first lens group includes i lenses, the second lens group includes at least one lens, the i lenses of the first lens group and the lens closest to the first reflector in the second lens group total i+1 lenses, and the ability to refract light satisfies:

[0006] Where, 1≤n≤i+1, n is a positive integer, ct n is the center thickness of the nth lens, r1 n The curvature radius of the first surface of the nth lens is r2, which faces the object side. n This represents the radius of curvature of the second surface of the n-th lens, where the second surface of the lens faces the image side.

[0007] It is understandable that the larger the radius of curvature of the lens, the smaller its ability to refract light, and the smaller the thickness of the lens, the smaller its ability to refract light. When the first drive component drives the first lens group and the first reflector to perform anti-shake, the light refracting capabilities of all lenses of the first lens group and the first lens of the second lens group are set to be smaller, which is conducive to balancing aberrations and improving the imaging quality of the optical lens. Therefore, the camera module of the present application has better imaging quality while being miniaturized. Compared with the traditional solution of driving the photosensitive element to move to achieve anti-shake, the drive structure design and circuit design of driving the first lens group and the first reflector are less difficult, which can reduce the difficulty of setting up the first drive component, has a lower preparation cost, and has a simpler structure and a smaller volume.

[0008] In some possible implementations, at least one of the lenses included in the first lens group and the second lens group has an Abbe number greater than 58.

[0009] It can be understood that the larger the Abel number of the lens, the smaller the dispersion of the lens and the smaller the chromatic aberration of the imaging, which is conducive to the miniaturization of the optical lens and the better imaging quality of the optical lens.

[0010] In some possible implementations, the first reflective device is a reflective prism, a reflective mirror, or a reflective film.

[0011] In some possible implementations, the optical lens further includes a second reflective device, which is located on the image side of the second lens group. The second reflective device is used to change the direction of the optical axis from the second direction to a third direction, and the second direction and the third direction intersect.

[0012] It is understandable that the optical lens can be bent twice in the direction of the optical axis. When the optical lens is used in a camera module, the photosensitive surface of the photosensitive element can be set flat, the photosensitive element can be set larger, and the optical lens can be suitable for use scenarios that require a large photosensitive surface.

[0013] In some possible implementations, the optical lens further includes a stop, and the stop is located on the object side of the first lens group.

[0014] It is understood that the aperture can be used to adjust the intensity of the light beam entering the optical lens, so that the imaging quality of the optical lens is better.

[0015] In some possible implementations, the light-emitting surface of the first lens group contacts and is fixed to the light-incident surface of the first reflective device.

[0016] It should be understood that the light-exiting surface of the first lens group is the light-exiting surface of the lens in the first lens group closest to the first reflector. Compared to a solution in which the first lens L1 and the first reflector are spaced apart, the first lens L1 contacts and fixes the first reflector, eliminating the space between the first lens L1 and the first reflector, and thus reducing the size of the optical lens.

[0017] In some possible implementations, the first driving assembly is connected to the first lens group, and the first driving assembly is connected to the first reflecting device.

[0018] It is understandable that the connection relationship between the first drive assembly and the first lens group, and the first drive assembly and the first reflector can be adjusted according to the fixed connection relationship between the first lens group and the first reflector. When there is no direct contact connection relationship between the first lens group and the first reflector. The first drive assembly is connected to the first lens group, and the first drive assembly is connected to the first reflector. At this time, the first drive assembly is respectively connected to the first lens group and the first reflector. The first drive assembly drives the first lens group and the first reflector to move simultaneously to achieve optical image stabilization of the camera module.

[0019] In some possible implementations, the first lens group is fixed to the first reflective device, and the first driving assembly is connected to the first lens group or the first reflective device.

[0020] It is understandable that the connection relationship between the first drive assembly and the first lens group, and the first drive assembly and the first reflector can be adjusted according to the fixed connection relationship between the first lens group and the first reflector. When the first lens group is fixed to the first reflector, the first drive assembly can be connected to the first lens group or the first reflector. When the first drive assembly drives either the first lens group or the first reflector to move, it can drive the other to move. In this way, the first drive assembly can simultaneously drive the first lens group and the first reflector to move to achieve optical image stabilization of the camera module.

[0021] In some possible implementations, the first lens group has positive optical power.

[0022] It can be understood that the first lens group with positive optical power can converge light. When external light passes through the first lens group and enters the first reflective device, the first reflective device does not need to have a large reflective surface to reflect all the light. That is, the volume of the first reflective device can be smaller, and the volume of the optical lens is smaller.

[0023] In some possible implementations, the optical lens further includes a third lens group, which is located on the image side of the second lens group. The second lens group or the third lens group is a focusing lens group of the optical lens.

[0024] It is understood that the second lens group or the third lens group is a focusing lens group of the optical lens, which has a focusing function and good imaging quality. The optical lens can be provided with one or more lens groups on the image side of the first reflector. The number of lens groups can be adjusted as needed and is not limited by this application.

[0025] In some possible implementations, the first lens group has positive optical power, the second lens group has positive optical power, and the third lens group has negative optical power.

[0026] It can be understood that by rationally configuring the optical power of the first lens group, the second lens group, and the third lens group, the focusing lens group can complete focusing through a shorter focusing stroke during the focusing process. The shorter focusing stroke can effectively suppress the deterioration of aberrations caused by focusing, so that the lens has a stronger focusing ability, thereby having higher imaging quality and stronger macro capabilities. At the same time, since the focusing stroke required for lens focusing is shorter, it is also beneficial to reduce the size of the motor used to drive the movement of the second lens group. In addition, since the third lens group is a lens group with negative optical power close to the imaging surface, it plays the role of a flat field lens, which can compensate for some of the field curvature changes caused by focusing, thereby enhancing the focusing ability of the focusing lens group, making the optical lens have a strong focusing ability and higher imaging quality.

[0027] In a second aspect, embodiments of the present application provide a camera module, which includes a photosensitive component and an optical lens, wherein the photosensitive component is located on the image side of the optical lens.

[0028] It is understandable that the optical lens is smaller in size and has better molding quality, and the size of the camera module can also be set smaller, which is better for beginners.

[0029] In some possible implementations, the effective optical focal length EFL and the total optical length TTL of the camera module meet the following requirements: 0.1 <EFL / TTL<1。

[0030] In some possible implementations, the total optical length TTL and half image height IMH of the camera module meet the following requirements: 0.1 <IMH / TTL<0.5。

[0031] In some possible implementations, the optical lens further includes a third lens group located on the image side of the second lens group. The second lens group or the third lens group serves as a focusing lens group of the optical lens. The distance the focusing lens group moves along the second direction is ΔL, where ΔL and the total optical length (TTL) of the camera module satisfy the formula: 0.01 < ΔL / TTL < 0.4.

[0032] In a third aspect, an embodiment of the present application provides an electronic device, which includes a housing and a camera module, wherein the camera module is mounted on the housing.

[0033] It is understandable that the camera module is smaller in size and occupies less internal space of the housing, which is conducive to the miniaturization of electronic devices. The camera module has better imaging quality, better shooting function of electronic devices, and better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0035] FIG1 is a schematic structural diagram of an electronic device 1000 according to an embodiment of the present application;

[0036] FIG2 is a partial cross-sectional view of the electronic device 1000 shown in FIG1 taken along line AA in one embodiment;

[0037] FIG3 is a partial structural diagram of an embodiment of the camera module 100 shown in FIG2 ;

[0038] FIG4 is a partial structural diagram of another embodiment of the camera module 100 shown in FIG2 ;

[0039] FIG5 is a schematic diagram of an embodiment of the camera module 100 shown in FIG4 in a use state;

[0040] FIG6 is an MTF curve diagram of the camera module 100 shown in FIG4 in an infinite distance state;

[0041] FIG7 is an MTF curve diagram of the camera module 100 shown in FIG5 in a macro state;

[0042] FIG8 is a partial structural diagram of another embodiment of the camera module 100 shown in FIG2 ;

[0043] FIG9 is a schematic diagram of an embodiment of the camera module 100 shown in FIG8 in a use state;

[0044] FIG10 is an MTF curve diagram of the camera module 100 shown in FIG8 in an infinite distance state;

[0045] FIG11 is an MTF curve diagram of the camera module 100 shown in FIG9 in a macro state;

[0046] FIG12 is a partial structural diagram of another embodiment of the camera module 100 shown in FIG2 ;

[0047] FIG13 is a schematic diagram of an embodiment of the camera module 100 shown in FIG12 in a use state;

[0048] FIG14 is an MTF curve diagram of the camera module 100 shown in FIG12 in an infinite distance state;

[0049] FIG15 is an MTF curve diagram of the camera module 100 shown in FIG13 in a macro state;

[0050] FIG16 is a partial structural diagram of another embodiment of the camera module 100 shown in FIG2 ;

[0051] FIG17 is a schematic diagram of an embodiment of the camera module 100 shown in FIG16 in a use state;

[0052] FIG18 is an MTF curve diagram of the camera module 100 shown in FIG16 in an infinite distance state;

[0053] FIG19 is an MTF curve diagram of the camera module 100 shown in FIG17 in a macro state;

[0054] FIG20 is a partial structural diagram of another embodiment of the camera module 100 shown in FIG2 ;

[0055] FIG21 is an MTF curve diagram of the camera module 100 shown in FIG20 in an infinite distance state;

[0056] FIG22 is a partial structural diagram of another embodiment of the camera module 100 shown in FIG2 ;

[0057] FIG23 is a schematic diagram of an embodiment of the camera module 100 shown in FIG22 in a use state;

[0058] FIG24 is an MTF curve diagram of the camera module 100 shown in FIG22 in an infinite distance state;

[0059] FIG25 is an MTF curve diagram of the camera module 100 shown in FIG23 in a macro state;

[0060] FIG26 is a partial structural diagram of another embodiment of the camera module 100 shown in FIG2 ;

[0061] FIG27 is a schematic diagram of an embodiment of the camera module 100 shown in FIG26 in a use state;

[0062] FIG28 is an MTF curve diagram of the camera module 100 shown in FIG26 at infinity;

[0063] FIG29 is an MTF curve diagram of the camera module 100 shown in FIG27 in a macro state;

[0064] FIG30 is a partial structural diagram of another embodiment of the camera module 100 shown in FIG2 ;

[0065] FIG31 is an MTF curve diagram of the camera module 100 shown in FIG30 in an infinite distance state. DETAILED DESCRIPTION

[0066] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this application are explained and described below.

[0067] Focal power is equal to the difference between the convergence of the image-side beam and the convergence of the object-side beam. It characterizes the ability of an optical system to deflect light.

[0068] A lens or lens group with positive optical power has a positive focal length and has the effect of converging light.

[0069] A lens or lens group with negative optical power has a negative focal length and has the effect of diverging light.

[0070] Focal length, also known as focal length, is a measure of the convergence or divergence of light in an optical system. It refers to the vertical distance from the optical center of a lens or lens group to the focal plane, when an object at infinite distance is formed through the lens or lens group. From a practical perspective, it can be understood as the distance from the center of the lens to the plane when the object is at infinite distance. For a fixed-focus lens, the position of its optical center is fixed; for a telephoto lens, changes in the optical center result in changes in the focal length.

[0071] The effective focal length (EFL) of a lens refers to the distance from the center of the lens to the focal point.

[0072] The object side is divided by the lens. The side where the object is located is called the object side, and the surface of the lens close to the object side is called the object side.

[0073] The image side, with the lens as the boundary, the side where the image of the object is located is called the image side, and the surface of the lens close to the image side is called the image side.

[0074] The aperture diaphragm is a device used to control the amount of light that passes through the lens and enters the photosensitive surface inside the camera body. It is usually inside the lens.

[0075] Aperture, also known as F-number (Fno), is a relative value calculated by dividing the focal length of a lens by the diameter of its entrance pupil (the inverse of the relative aperture). The smaller the aperture, the more light enters the image per unit time. A larger aperture reduces the depth of field, blurring the background in photos, similar to the effect of a telephoto lens.

[0076] Total track length (TTL) refers to the total length from the surface of the lens closest to the object side to the imaging surface. TTL is the main factor affecting the height of the camera.

[0077] The imaging plane is located on the image side of all lenses in the telephoto lens, and is the plane on which the image is formed after light passes through each lens in the telephoto lens in sequence.

[0078] The optical axis is an axis running perpendicularly through the center of a lens. It's the axis running through the centers of each lens element. When light rays parallel to the optical axis enter a convex lens, an ideal convex lens would have all the rays converge at a single point behind the lens. This point is the focal point.

[0079] The Abbe number (Abbe), also known as the dispersion coefficient, is the difference ratio of the refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material.

[0080] 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.

[0081] 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 aberration 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.

[0082] ImgH (Image Hight) represents half of the diagonal length of the effective pixel area on the photosensitive chip, that is, the image height of the imaging surface.

[0083] Astigmatism occurs when an object point is not on the optical axis of an optical system. The resulting beam is tilted at an angle to the optical axis. After refraction through a lens, the convergence points of the meridional and sagittal beamlets are not aligned. This means the beam cannot be focused to a single point, resulting in an unclear image. Astigmatism is the name given to beams in two perpendicular planes within a rotationally symmetric optical system.

[0084] Meridian plane: The plane formed by the chief ray (chief beam) of an object point outside the optical axis and the optical axis is called the meridian plane.

[0085] The sagittal plane is the plane that passes through the main ray (main beam) of the object point outside the optical axis and is perpendicular to the meridian plane.

[0086] The embodiments of the present invention are described below in conjunction with the accompanying drawings. The embodiments described herein with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0087] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. It should be understood that in the present application, "electrical connection" can be understood as the physical contact and electrical conduction of components; it can also be understood as the form in which different components in the circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals. "Connection" and "connected" can both refer to a mechanical connection relationship or a physical connection relationship. For example, A is connected to B or A and B are connected to each other, which means that there is a fastening component (such as a screw, bolt, rivet, etc.) between A and B, or A and B are in contact with each other and A and B are difficult to separate.

[0088] Furthermore, the word "fixed" in this article should also be understood in a broad sense. For example, "fixed" can be directly fixed or indirectly fixed through an intermediate medium. Among them, "fixed" means connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, 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 cannot be understood as a limitation on the embodiments of the present application. "Multiple" refers to two or more than two.

[0089] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0090] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of the features.

[0091] Fig. 1 is a schematic structural diagram of an embodiment of an electronic device 1000 provided in an embodiment of the present application. Fig. 2 is a partial cross-sectional view of an embodiment of the electronic device 1000 shown in Fig. 1 taken along line AA.

[0092] The electronic device 1000 may be a device with a camera function, such as a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, an in-vehicle device, a video surveillance device, a wearable device, augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses, or a VR helmet. The electronic device 1000 of the embodiment shown in FIG1 is described using a mobile phone as an example.

[0093] As shown in Figures 1 and 2, the electronic device 1000 may include a camera module 100, a housing 200 and a screen 300 (not shown). Among them, the camera module 100 can be a rear camera module or a front camera module. This application is introduced by taking the camera module 100 as an example of a rear camera module. It should be noted that Figures 1, 2 and the following related drawings only schematically illustrate some components included in the electronic device 1000, and the actual shape, actual size, actual position and actual structure of these components are not limited to Figures 1, 2 and the following drawings. In other embodiments, when the electronic device 1000 is a device of some other form, the electronic device 1000 may also not include the screen 300.

[0094] For ease of description, the thickness direction of the electronic device 1000 is defined as the X-axis. The length direction of the electronic device 1000 is defined as the Y-axis. The width direction of the electronic device 1000 is defined as the Z-axis. It is understood that the coordinate system setting of the electronic device 1000 can be flexibly set according to specific actual needs.

[0095] In this embodiment, the housing 200 may include a frame 210 and a back cover 220. The back cover 220 is fixedly connected to the frame 210. For example, the back cover 220 may be fixedly connected to the frame 210 by adhesive. The back cover 220 may also be integrally formed with the frame 210, i.e., the back cover 220 and the frame 210 form a single unitary structure.

[0096] Alternatively, the screen 300 can be located on the side of the frame 210 away from the back cover 220. In this case, the screen 300 and the back cover 220 are located on either side of the frame 210. The screen 300, the frame 210, and the back cover 220 together enclose the interior of the electronic device 1000. The interior of the electronic device 1000 can be used to house components of the electronic device 1000, such as a battery, a receiver, or a microphone.

[0097] In some embodiments, the screen 300 can be used to display images, etc. The screen 300 can be a flat screen or a curved screen. The display screen of the screen 300 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, or a liquid crystal display (LCD).

[0098] In some embodiments, the electronic device 1000 may further include an image processor 400. The image processor 400 may be located inside the electronic device 1000. The image processor 400 is communicatively connected to the camera module 100, and the image processor 400 is used to obtain image data from the camera module 100 and process the image data. The communication connection between the camera module 100 and the image processor 400 may include data transmission through electrical connection methods such as wiring, or data transmission may be achieved through coupling or the like. It is understandable that the camera module 100 and the image processor 400 may also be communicatively connected through other methods that can achieve data transmission.

[0099] Image processor 400 optimizes and processes digital image signals and transmits the processed signals to screen 300. Image processor 400 can be an image processing chip or a digital signal processing chip. Its function is to promptly and quickly transmit data obtained by the photosensitive chip to the central processing unit and refresh the photosensitive chip. Therefore, the quality of image processor 400 directly affects image quality (such as color saturation and clarity).

[0100] In some embodiments, the electronic device 1000 may further include an analog-to-digital converter 500, which is connected between the camera module 100 and the image processor 400. The analog-to-digital converter 500 is used to convert the signal generated by the camera module 100 into a digital image signal and transmit it to the image processor 400.

[0101] In some embodiments, the electronic device 1000 may further include a memory 600, which is communicatively connected to the image processor 400. The image processor 400 processes the digital image signal and then transmits the image to the memory 600, so that when the image is subsequently needed, the image can be retrieved from the memory 600 and displayed on the screen 300 at any time. In some embodiments, the image processor 400 may further compress the processed digital image signal before storing it in the memory 600 to save space in the memory 600.

[0102] For example, the camera module 100 can be located inside the electronic device 1000. The camera module 100 can be fixedly connected to the side of the screen 300 facing the back cover 220. The back cover 220 can be provided with a light-transmitting hole 2201. The shape of the light-transmitting hole 2201 is not limited to the circular shape shown in FIG. 1 . The light-transmitting hole 2201 connects the interior of the electronic device 1000 to the exterior of the electronic device 1000. Light outside the electronic device 1000 can enter the interior of the electronic device 1000 through the light-transmitting hole 2201. The camera module 100 can collect ambient light entering the interior of the electronic device 1000.

[0103] The image processor 400, the analog-to-digital converter 500 and the memory 600 may also be located inside the electronic device 1000. In FIG1 , the image processor 400, the analog-to-digital converter 500 and the memory 600 are schematically represented by dashed boxes.

[0104] In some embodiments, the back cover 220 may include a light-transmitting lens, which is installed in the light-transmitting hole 2201 to allow light to pass through and is dust-proof and waterproof.

[0105] It is understandable that the installation position of the camera module 100 of the electronic device 1000 in the embodiment shown in Figure 1 is merely schematic, and the present application does not strictly limit the installation position of the camera module 100. In some other embodiments, the camera module 100 may also be installed at other positions of the electronic device 1000, for example, the camera module 100 may be installed in the upper middle or upper right corner of the back of the electronic device 1000. In some other embodiments, the electronic device 1000 may include a terminal body and an auxiliary component that can be rotated, moved or disassembled relative to the terminal body, and the camera module 100 may also be set on the auxiliary component. In addition, the size, quantity and position of the image processor 400, analog-to-digital converter 500, and memory 600 shown in Figure 1 are merely schematic representations and can be adjusted as needed, and the present application does not limit this.

[0106] As shown in Figure 2, the camera module 100 may include an optical lens 10 and a photosensitive component 20. The photosensitive component 20 may be 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 photosensitive component 20 may be fixed to the circuit board. Light can pass through the optical lens 10 and illuminate the photosensitive surface of the photosensitive element 22. 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 photosensitive surface of the photosensitive component 20. The photosensitive component 20 converts the optical image into an electrical signal, i.e., an analog image signal, and transmits it to the analog-to-digital converter 500, so as to be converted into a digital image signal through the analog-to-digital converter 500 and given to the image processor 400.

[0107] For example, the photosensitive assembly 20 may include a filter 21 and a photosensitive element 22. The photosensitive element 22 is located on the image side of the filter 21. Light can sequentially pass through the optical lens 10 and the filter 21 to illuminate the photosensitive surface of the photosensitive element 22. The photosensitive surface of the photosensitive element 22 also serves as the photosensitive surface of the photosensitive assembly 20.

[0108] The photosensitive element 22 (also known as an image sensor) is a semiconductor chip with hundreds of thousands to millions of photodiodes on its surface. When exposed to light, these diodes generate an electric charge. The photosensitive element 22 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 an electric charge. A CCD consists of many photosensitive units, typically measured in millions of pixels. When light strikes the surface of a CCD, each photosensitive unit reflects an electric charge on the component. The signals generated by all the photosensitive units are added together to form a complete image. CMOS devices primarily utilize semiconductors made of silicon and germanium, resulting in the coexistence of semiconductors with N (negative charge) and P (positive charge) levels on the CCD. The current generated by these two complementary effects can be recorded and interpreted as an image by the processing chip.

[0109] The filter 21 can be used to filter out unnecessary wavelengths in the light, prevent the photosensitive element 22 from generating false colors or ripples, and thus improve its effective resolution and color reproduction. Exemplarily, the filter 21 can be an infrared filter. In some other embodiments, the camera module 100 can also cancel the separate filter 21 structure, but instead perform surface treatment or material treatment on some optical elements in the optical lens 10 (such as any lens in the first lens group 1 or the second lens group 3) to achieve the filtering function. This application does not strictly limit the specific embodiments of the structural members or structures used to achieve filtering.

[0110] As shown in FIG2 , in some embodiments, the camera module 100 can be a periscope camera module 100 (i.e., the optical axis direction of the camera module 100 can be in any direction on the YZ plane). In this way, the camera module 100 has a lower height in the X-axis direction, making it more suitable for use in thin electronic devices 1000.

[0111] FIG3 is a partial structural diagram of an embodiment of the camera module 100 shown in FIG2 .

[0112] As shown in Figures 2 and 3, the optical lens 10 may include a first lens group 1, a first reflector 2, and a second lens group 3 arranged from the object side to the image side. The photosensitive component 20 of the camera module 100 is located on the image side of the second lens group 3. The first reflector 2 can be used to change the direction of the optical axis. The first reflector 2 changes the direction of the optical axis from a first direction to a second direction, and the second direction intersects the first direction. For example, the first direction can be the X-axis direction, and the second direction can be the Z-axis direction.

[0113] It can be understood that compared with the solution in which all lens groups of the optical lens 10 are arranged on the image side of the first reflector 2, the present application arranges the first lens group 1 on the object side of the first reflector 2, which can shorten the length of the optical lens 10 in the second direction, which is conducive to the miniaturization of the camera module 100.

[0114] The optical lens 10 may further include a first drive assembly 30. The first drive assembly 30 may be used to drive the first lens group 1 and the first reflector 2 to move, thereby achieving optical image stabilization of the optical lens 10. The first lens group 1 and the first reflector 2 may constitute an image stabilization lens group of the optical lens 10.

[0115] It is understandable that in the traditional solution of achieving anti-shake by driving the photosensitive element 22 to move, it is necessary to set up an anti-shake drive mechanism around the image sensor. The structural design and circuit design of the anti-shake drive mechanism are relatively complex and require a large installation space. The present application achieves anti-shake by driving the first lens group 1 and the first reflector 2, and there is no need to reserve installation space for the anti-shake drive mechanism around the photosensitive element 22. In addition, the driving structure design and circuit design of driving the first lens group 1 and the first reflector 2 are less difficult, the first drive assembly 30 is small in size, difficult to set up, and has a low manufacturing cost. Therefore, the module size of the camera module 100 can be reduced, which is conducive to the miniaturization of the camera module 100.

[0116] It is understandable that the connection relationship between the first drive assembly 30 and the first lens group 1, and the first drive assembly 30 and the first reflector 2 can be adjusted according to the fixed connection relationship between the first lens group 1 and the first reflector 2. In some embodiments, there is no direct contact connection relationship between the first lens group 1 and the first reflector 2. The first drive assembly 30 is connected to the first lens group 1, and the first drive assembly 30 is connected to the first reflector 2. At this time, the first drive assembly 30 is respectively connected to the first lens group 1 and the first reflector 2. The first drive assembly 30 drives the first lens group 1 and the first reflector 2 to move at the same time to achieve optical image stabilization of the camera module 100.

[0117] In some embodiments, when the first lens group 1 is fixed to the first reflector 2, the first drive assembly 30 can be connected to the first lens group 1 or the first reflector 2. When the first drive assembly 30 drives either the first lens group 1 or the first reflector 2 to move, it can also drive the other to move. In this way, the first drive assembly 30 can simultaneously drive the first lens group 1 and the first reflector 2 to achieve optical image stabilization for the camera module 100.

[0118] The first lens group 1 includes i lenses, where i is a positive integer greater than or equal to 1. In the first lens group 1, from the object side to the image side, the first lens, the second lens, ..., the i-th lens are sequentially arranged. The first lens group 1 shown in Figures 2 and 3 illustrates only one lens. In other embodiments, the first lens group 1 may also include multiple lenses.

[0119] The second lens group 3 includes at least one lens. Figures 2 and 3 illustrate that the second lens group 3 may include three lenses. In other embodiments, the second lens group 3 may also include one lens, two lenses, or more than three lenses. Exemplarily, the second lens group 3 includes k lenses, where k is a positive integer greater than or equal to 1. In the second lens group 3, from the object side to the image side, the lenses are, in order: the i+1th lens, the i+2th lens, and so on.

[0120] The light refracting ability of the i+1 lens in the first lens group 1 and the lens closest to the first reflector 2 (i.e., the i+1 lens) in the second lens group 3 satisfies:

[0121] Where 1≤n≤i+1, and n is a positive integer. For example, the first lens group 1 and the second lens group 3 comprise, in order from the object side to the image side, the first lens, the second lens, and so on, the nth lens. Where n=i+1, the i+1th lens represents the lens in the second lens group 3 closest to the first reflector 2.

[0122] ct n is the center thickness of the nth lens. The center thickness of the lens refers to the thickness of the midpoint of the lens along the optical axis.

[0123] r1 n represents the curvature radius of the first surface of the nth lens, where the first surface of the lens faces the object side;

[0124] r2 n This represents the radius of curvature of the second surface of the n-th lens, where the second surface faces the image side.

[0125] It is understood that the larger the radius of curvature of a lens, the smaller its light-refracting ability, and the smaller the lens thickness, the smaller its light-refracting ability. When the first drive assembly 30 drives the first lens group 1 and the first reflector 2 for anti-shake, the light-refracting ability of all lenses in the first lens group 1 and the first lens in the second lens group 3 is set to be relatively small, which helps balance aberrations and improves the imaging quality of the optical lens 10.

[0126] In some embodiments, at least one of all the lenses included in the first lens group 1 and the second lens group 3 has an Abbe number greater than 58. It is understood that the larger the Abel number of a lens, the smaller the dispersion of the lens and the chromatic aberration of the image, which is conducive to miniaturization of the optical lens 10 and better imaging quality of the camera module 100.

[0127] In some embodiments, the first drive assembly 30 can drive the anti-shake mirror group to rotate about a first rotation axis and a second rotation axis to achieve anti-shake for the camera module 100. The first rotation axis is not parallel to the normal to the light-emitting surface of the first reflector 2. The second rotation axis is not parallel to the first rotation axis and is not parallel to the normal to the light-emitting surface of the first reflector 2.

[0128] In some embodiments, the first rotation axis may be parallel to the first direction or the second direction, and the second rotation axis may be perpendicular to the first rotation axis. For example, as shown in FIG3 , the first rotation axis may be in the X-axis direction, and the second rotation axis may be in the Z-axis direction.

[0129] In some embodiments, the angle θ1 at which the first drive assembly 30 drives the anti-shake mirror group to rotate around the first rotation axis satisfies the following: 0°<θ1<3°. For example, θ1 may be 0.5°, 1°, 1.5°, 2°, or 2.5°. The angle θ2 at which the first drive assembly 30 drives the anti-shake mirror group to rotate around the second rotation axis satisfies the following: 0°<θ2<3°. For example, θ2 may be 0.5°, 1°, 1.5°, 2°, or 2.5°. It is understandable that the rotation angles of the anti-shake mirror group around the first rotation axis and the second rotation axis are small, and the rotation space reserved around the anti-shake mirror group can be small, which is conducive to the miniaturization of the camera module 100.

[0130] The second lens group 3 can be a fixed lens group or a focus lens group that moves along the optical axis. The movement along the optical axis can include two directions: moving toward the image side and moving toward the object side.

[0131] It is understood that when the second lens group 3 is a focusing lens group, the camera module 100 has a focusing function and the imaging quality of the camera module 100 is better. The optical lens 10 may further include a second drive assembly 50, which is used to drive the focusing lens group to move along the optical axis direction (second direction) to achieve focusing of the optical lens 10.

[0132] FIG4 is a partial structural diagram of another embodiment of the camera module 100 shown in FIG2 .

[0133] As shown in FIG4 , the optical lens system 10 may further include a third lens group 4. Third lens group 4 is located on the image side of second lens group 3. Third lens group 4 includes at least one lens. For example, third lens group 4 may include h lenses, where h is a positive integer greater than or equal to 1. In third lens group 4, from the object side to the image side, the lenses are, in order: i+k+1th lens, i+k+2th lens, and so on.

[0134] In some embodiments, the optical lens 10 may further include a fourth lens group (not shown), which may be located on the image side of the third lens group 4. It is understandable that the optical lens 10 may be provided with one or more lens groups on the image side of the first reflector 2. The number of lens groups may be adjusted as required, and this application does not impose any restrictions thereto. The naming of the lenses included in the fourth lens group may refer to the naming rules of the second lens group 3 or the third lens group 4 described above. Each lens group includes at least one lens, and the specific number may be adjusted as required, and this application does not impose any restrictions thereto.

[0135] In some embodiments, when the image side of the first reflector 2 is provided with multiple lens groups, some of the multiple lens groups can serve as the focusing lens group of the optical lens 10, and the second drive assembly 50 drives the focusing lens group to move to achieve focusing. For example, when the optical lens 10 includes a first lens group 1, a second lens group 3, and a third lens group 4, either the second lens group 3 or the third lens group 4 can be a focusing lens group, and the other can be a fixed lens group. The second drive assembly 50 can be used to drive the focusing lens group to move along the direction of the optical axis (the second direction).

[0136] In some embodiments, the first lens group 1 may have positive optical power. It is understood that the first lens group 1 with positive optical power can converge light. When external light passes through the first lens group 1 and enters the first reflector 2, the first reflector 2 can reflect all light without having to have a large reflective surface. In other words, the volume of the first reflector 2 can be relatively small, which is conducive to reducing the volume of the camera module 100.

[0137] In some embodiments, the first lens group 1 may have a positive optical power. The second lens group 3 may have a positive optical power, and the third lens group 4 may have a negative optical power. It is understandable that by rationally configuring the optical power of the first lens group 1, the second lens group 3, and the third lens group 4, the focusing lens group can complete focusing through a smaller focusing stroke during the focusing process. The smaller focusing stroke can effectively suppress the deterioration of aberrations caused by focusing, so that the lens has a stronger focusing ability, thereby having higher imaging quality and stronger macro capabilities. At the same time, since the focusing stroke required for lens focusing is smaller, it is also beneficial to reduce the volume of the motor used to drive the second lens group 3 to move, making the camera module 100 easier to miniaturize. In addition, since the third lens group 4 is a lens group with negative optical power close to the imaging surface, it plays the role of a flat field lens, which can compensate for part of the field curvature changes caused by focusing, thereby enhancing the focusing ability of the focusing lens group, making the optical lens 10 have a strong focusing ability and the camera module 100 have a higher imaging quality.

[0138] In some embodiments, the focal length of the first lens group 1 can be in the range of 30 mm to 70 mm. The focal length of the second lens group 3 can be in the range of 6 mm to 13 mm. The focal length of the third lens group 4 can be in the range of -12 mm to -5 mm. It will be understood that the "+" and "-" focal lengths are used to distinguish whether the lens group is converging or diverging light.

[0139] In some embodiments, the distance that the focusing lens group moves along the second direction is ΔL, and ΔL satisfies the formula: 0.01 < ΔL / TTL < 0.4. For example, ΔL / TTL can be 0.02, 0.055, 0.061, 0.068, 0.07, 0.08, 0.12, 0.25, 0.32, 0.38, etc. Here, TTL is the total length from the light incident surface of the optical lens 10 to the imaging surface of the imaging module 100.

[0140] In some embodiments, the effective focal length EFL of the optical lens 10 of the imaging module 100 satisfies: 0.1 < EFL / TTL < 1. For example, EFL / TTL can be 0.58, 0.61, 0.63, 0.65, 0.66, 0.69, 0.78, 0.85, 0.99, etc.

[0141] In some embodiments, the image height IMH of the imaging surface of the imaging module 100 satisfies: 0.1 < IMH / TTL < 0.5. For example, IMH / TTL can be 0.17, 0.18, 0.19, 0.25, 0.36, 0.48, etc.

[0142] In some embodiments, the effective focal length f and the entrance pupil diameter EPD of the optical lens 10 satisfy: f / EPD. For example, f / EPD can be 1.5, 1.72, 1.81, 1.97, 1.99, 2.03, 2.20, etc.

[0143] In some embodiments, the optical lens 10 may further include a second reflecting device. The second reflecting device may be located on the image side of the second lens group 3 and on the object side of the photosensitive component 20. The second reflecting device is used to change the optical axis direction from the second direction to the third direction, and the second direction and the third direction intersect. The following will introduce the optical lens 10 including the first reflecting device 2 and the second reflecting device through specific embodiments, and details will not be elaborated here.

[0144] In some embodiments, the optical lens 10 may further include an aperture 40. The aperture 40 may be located on the object side of the first lens group 1. The aperture 40 can be used to adjust the intensity of the light beam entering the optical lens 10. In this way, the imaging quality of the optical lens 10 is better. Exemplarily, the aperture 40 may have an aperture hole. Along the optical axis direction, the aperture hole may be disposed opposite to the first lens group 1, and light enters the optical lens 10 through the aperture hole.

[0145] In some embodiments, the aperture 40 may be a spacer structure or a variable fan blade structure; or, the aperture 40 may be realized by a surface spraying process, for example, by spraying a light-shielding material on the lens to form the aperture 40.

[0146] In some embodiments, the optical surface of at least one lens of the optical lens 10 is aspherical, and the aspherical optical surface has different optical focal lengths from the paraxial area to the outer field of view area, so that the image quality is more balanced.

[0147] In some embodiments, the optical surface of at least one lens of the optical lens 10 may be a free-form surface to correct aberrations. An aspheric surface is a surface that is rotationally symmetric about the optical axis O. A free-form surface may have no axis of symmetry, may be symmetric along a certain direction, or may be symmetric along two directions.

[0148] Several specific implementations of the camera module 100 are introduced below in conjunction with the accompanying drawings, lens data, and simulation results.

[0149] Figure 5 is a schematic diagram of an embodiment of the camera module 100 shown in Figure 4 in use. The camera module 100 shown in Figure 4 is in an infinite shooting mode. The camera module 100 shown in Figure 5 is in a macro shooting mode.

[0150] As shown in Figures 4 and 5, the camera module 100 may include an optical lens 10 and a photosensitive component 20. The photosensitive component 20 is located on the image side of the optical lens 10. The photosensitive component 20 includes a filter 21 and a photosensitive element 22. The optical lens 10 may include an aperture 40, a first lens group 1, a first reflector 2, a second lens group 3 and a third lens group 4 arranged from the object side to the image side. Among them, the first reflector 2 is a reflector. The second lens group 3 is a focusing lens group of the camera module 100. During the focusing process of the optical lens 10 switching from a distant view to a close view, the second lens group 3 moves along the optical axis toward the object side. In other embodiments, the second lens group 3 may also move along the optical axis toward the image side. The third lens group 4 is a fixed lens group.

[0151] The first lens group 1 includes one lens, the first lens L1. The second lens group 3 includes three lenses, the second lens L2, the third lens L3, and the fourth lens L4. The third lens group 4 includes three lenses, the fifth lens L5, the sixth lens L6, and the seventh lens L7. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are spaced in order from the object side to the image side along the optical axis.

[0152] Light propagating inside the camera module 100 undergoes a deflection through the first reflector 2. The optical axis O includes a first portion O1 extending from the object side of the first lens L1 to the reflective surface of the first reflector 2, and a second portion O2 extending from the reflective surface of the first reflector 2 to the photosensitive surface of the photosensitive element 22.

[0153] Please refer to Tables 1a to 1c. Table 1a shows the optical parameters of the camera module 100 shown in Figure 4. Table 1b shows the curvature radius, thickness, focal length, refractive index, and Abbe coefficient of each lens in one embodiment of the camera module 100 shown in Figure 4. Table 1c shows the conic coefficient and aspheric coefficient of each lens in one embodiment of the optical lens 10 shown in Figure 4.

[0154] Table 1a

[0155] Table 1b

[0156] Table 1c

[0157] In this embodiment, the first lens L1 to the seventh lens L7 may include 14 aspheric surfaces, and the surface shape z of all even-order aspheric surfaces may be defined by, but not limited to, the following aspheric curve equations:

[0158] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c = 1 / R is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric coefficient.

[0159] In this embodiment, the first lens group 1 has positive optical power and a focal length of 60.28 mm, the second lens group 3 has positive optical power and a focal length of 8.58 mm, and the third lens group 4 has negative optical power and a focal length of -6.62 mm.

[0160] The light refracting capabilities of all lenses in the first lens group 1 and the lens closest to the first reflector 2 in the second lens group 3 satisfy the following requirements:

[0161] The Abbe number of first lens element L1 is greater than 58. The second lens group 3 moves along the second optical axis O2, and the moving distance ΔL and the total optical length TTL satisfy: ΔL / TTL = 0.08. At infinite focus, the total optical length TTL and the image half-height IMH satisfy: IMH / TTL = 0.17. At infinite focus, the effective focal length EFL and the total optical length TTL satisfy: EFL / TTL = 0.58. At infinite focus, the effective focal length f and the entrance pupil diameter EPD satisfy: f / EPD = 1.5.

[0162] FIG6 is an MTF curve diagram of the camera module 100 shown in FIG4 in an infinite state. FIG7 is an MTF curve diagram of the camera module 100 shown in FIG5 in a macro state. The horizontal axis of the modulation transfer function (MTF) curve represents different spatial frequencies, and the unit is line pairs per millimeter (LP / mm), which refers to the number of black and white line pairs within 1 mm. The vertical axis of the MTF curve represents the percentage of the actual clarity restored. The resolution of the lens is calibrated. 1 is an ideal value without a unit and cannot be achieved in reality. The curve can only be infinitely close to 1, but can never be equal to 1.

[0163] The different curves in Figures 6 and 7 illustrate image field ranges of different sizes. The distance from the imaging center to the edge of the image field is used to distinguish image field ranges of different sizes (0mm, 0.360mm, 0.720mm, 1.080mm, 1.440mm, 1.800mm, 2.160mm, 2.520mm, 2.880mm, 3.240mm, 3.600mm, 3.900mm, a total of 12 image fields of different sizes are shown in Figures 6 and 7). Each size of the image field corresponds to two line segments, solid and dotted, representing different imaging beam directions, namely, the meridional beam and the sagittal beam. Therefore, Figure 6 illustrates the imaging clarity of the camera module 100 under the infinite state, under multiple image field ranges at different spatial frequencies, respectively, under the meridional beam and the sagittal beam. FIG7 illustrates the imaging clarity of the camera module 100 in the macro state under the meridional beam and the sagittal beam within multiple image field ranges at different spatial frequencies.

[0164] As shown in Figures 6 and 7, within the spatial frequency range of 0 LP / mm to 125 LP / mm, the camera module 100 in the infinite distance state has an image clarity of greater than 0.4 in both the meridional and sagittal directions for all image fields. Within the spatial frequency range of 0 LP / mm to 125 LP / mm, the camera module 100 in the macro state has an image clarity of greater than 0.4 in both the meridional and sagittal directions for all image fields. The camera module 100 achieves excellent image quality in both the infinite distance and macro states.

[0165] Figure 8 is a partial structural diagram of another embodiment of the camera module 100 shown in Figure 2. Figure 9 is a schematic diagram of an embodiment of the camera module 100 shown in Figure 8 in use. The camera module 100 shown in Figure 8 is in a shooting mode in an infinity state. The camera module 100 shown in Figure 9 is in a shooting mode in a macro state. It should be noted that the camera modules 100 shown in Figures 8 and 9 include most of the technical features of the camera module 100 shown in Figure 4. The following mainly describes the differences between the two, and most of the same contents between the two will not be repeated.

[0166] As shown in Figures 8 and 9, the camera module 100 may include an optical lens 10 and a photosensitive component 20. The photosensitive component 20 is located on the image side of the optical lens 10. The photosensitive component 20 includes a filter 21 and a photosensitive element 22. The optical lens 10 may include an aperture (not shown), a first lens group 1, a first reflector 2, a second lens group 3 and a third lens group 4 arranged from the object side to the image side. Among them, the first reflector 2 is a reflective prism. The second lens group 3 is a focusing lens group of the camera module 100. During the focusing process of the optical lens 10 switching from a distant view to a close view, the second lens group 3 moves along the optical axis toward the object side.

[0167] In this embodiment, the main difference from the camera module 100 shown in FIG4 is that the first reflective element 2 is a reflective prism. It will be appreciated that when a reflective prism is used as the first reflective element 2, due to the inherent chromatic aberration of the reflective prism, the center thickness and curvature radius of all lenses in the first lens group 1 and the first lens in the second lens group 3 need to be adjusted accordingly to achieve better imaging quality in the camera module 100. In other embodiments, the first reflective element 2 can also be a reflective film.

[0168] In this embodiment, the number of lenses in the first lens group 1, the second lens group 3, and the third lens group 4 is the same as that in the embodiment shown in FIG4 . The naming of each lens group can refer to the naming of the embodiment shown in FIG4 . Specific lens parameters can be found in the table below.

[0169] Please refer to Tables 2a to 2c. Table 2a lists the optical parameters of the camera module 100 shown in FIG8 . Table 2b lists the curvature radius, thickness, focal length, refractive index, and Abbe coefficient of each lens in one embodiment of the camera module 100 shown in FIG8 . Table 2c lists the conic coefficient and aspheric coefficient of each lens in one embodiment of the optical lens 10 shown in FIG8 .

[0170] Table 2a

[0171] Table 2b

[0172] Table 2c

[0173] In this embodiment, the first lens L1 to the seventh lens L7 may include 14 aspheric surfaces, and the surface shape z of all even-order aspheric surfaces may be defined by, but not limited to, the following aspheric curve equations:

[0174] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c = 1 / R is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric coefficient.

[0175] In this embodiment, the first lens group 1 has positive optical power and a focal length of 30.75 mm, the second lens group 3 has positive optical power and a focal length of 9.28 mm, and the third lens group 4 has negative optical power and a focal length of -5.28 mm.

[0176] The light refracting capabilities of all lenses in the first lens group 1 and the lens closest to the first reflector 2 in the second lens group 3 satisfy the following requirements:

[0177] The Abbe number of first lens element L1 is greater than 58. The second lens group 3 moves along the second optical axis O2, and the moving distance ΔL and the total optical length TTL satisfy: ΔL / TTL = 0.07. At infinite focus, the total optical length TTL and the image half-height IMH satisfy: IMH / TTL = 0.19. At infinite focus, the effective focal length EFL and the total optical length TTL satisfy: EFL / TTL = 0.69. At infinite focus, the effective focal length f and the entrance pupil diameter EPD satisfy: f / EPD = 2.20.

[0178] Fig. 10 is an MTF curve diagram of the camera module 100 shown in Fig. 8 in an infinite state. Fig. 11 is an MTF curve diagram of the camera module 100 shown in Fig. 9 in a macro state.

[0179] Figures 10 and 11 illustrate a total of 12 image fields of different sizes: 0mm, 0.508mm, 1.014mm, 1.517mm, 2.020mm, 2.525mm, 3.026mm, 3.522mm, 4.015mm, 4.499mm, 4.974mm, and 5.251mm. Each size of the image field corresponds to two line segments, solid and dashed, representing different imaging beam directions, namely the meridional beam and the sagittal beam. As shown in Figure 10, within the spatial frequency range of 0LP / mm to 125LP / mm, the camera module 100 in the infinite state has an imaging clarity of more than 0.4 in all image field ranges under the meridional beam and the sagittal beam. As shown in FIG11 , within the spatial frequency range of 0LP / mm to 125LP / mm, the camera module 100 in the macro state has an imaging clarity of more than 0.4 in all image field ranges under the meridional beam and the sagittal beam.

[0180] From the MTF curves of FIG. 10 and FIG. 11 , it can be seen that the camera module 100 has good imaging quality when shooting in both the infinity state and the macro state.

[0181] Figure 12 is a partial structural diagram of another embodiment of the camera module 100 shown in Figure 2. Figure 13 is a schematic diagram of an embodiment of the camera module 100 shown in Figure 12 in use. The camera module 100 shown in Figure 12 is in a shooting mode in an infinity state. The camera module 100 shown in Figure 13 is in a shooting mode in a macro state. It should be noted that the camera modules 100 shown in Figures 12 and 13 include most of the technical features of the camera module 100 shown in Figure 4. The following mainly describes the difference between the two, and most of the same contents between the two will not be repeated.

[0182] As shown in Figures 12 and 13, the camera module 100 may include an optical lens 10 and a photosensitive component 20. The photosensitive component 20 is located on the image side of the optical lens 10. The photosensitive component 20 includes a filter 21 and a photosensitive element 22. The optical lens 10 may include an aperture (not shown) arranged from the object side to the image side, a first lens group 1, a first reflector 2, a second lens group 3, and a third lens group 4. Among them, the first reflector 2 is a reflector. The second lens group 3 is a fixed lens group. The third lens group 4 is a focusing lens group of the camera module 100. During the focusing process of the optical lens 10 switching from a distant view to a close view, the third lens group 4 moves along the optical axis toward the image side.

[0183] In this embodiment, the main difference from the camera module 100 shown in FIG4 is that the third lens group 4 is closer to the photosensitive component 20 than the second lens group 3, and the third lens group 4 is set as a focusing lens group. It can be understood that compared with the focusing lens group being close to the first reflector 2, the focusing lens group is set as a lens group close to the photosensitive component 20. Under the same magnification, the height of the camera module 100 in the X-axis direction is smaller, and the volume of the camera module 100 can be smaller. This is conducive to the miniaturization of the camera module 100, and the camera module 100 can be applied to a thinner electronic device 1000 (that is, the thickness of the electronic device 1000 in the X-axis direction is smaller).

[0184] In this embodiment, the number of lenses in the first lens group 1, the second lens group 3, and the third lens group 4 is the same as that in the embodiment shown in FIG4 . The lenses in each lens group can be named with reference to the naming method in the embodiment shown in FIG4 . Specific lens parameters can be found in the table below.

[0185] Please refer to Tables 3a to 3c. Table 3a shows the optical parameters of the camera module 100 shown in FIG12. Table 3b shows the curvature radius, thickness, focal length, refractive index, and Abbe coefficient of each lens in one embodiment of the camera module 100 shown in FIG12. Table 3c shows the conic coefficient and aspheric coefficient of each lens in one embodiment of the optical lens 10 shown in FIG12.

[0186] Table 3a

[0187] Table 3b

[0188] Table 3c

[0189] In this embodiment, the first lens L1 to the seventh lens L7 may include 14 aspheric surfaces, and the surface shape z of all even-order aspheric surfaces may be defined by, but not limited to, the following aspheric curve equations:

[0190] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c = 1 / R is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric coefficient.

[0191] In this embodiment, the first lens group 1 has positive optical power and a focal length of 51.30 mm, the second lens group 3 has positive optical power and a focal length of 7.00 mm, and the third lens group 4 has negative optical power and a focal length of -7.99 mm.

[0192] The light refracting capabilities of all lenses in the first lens group 1 and the lens closest to the first reflector 2 in the second lens group 3 satisfy the following requirements:

[0193] The Abbe number of the first lens element L1 is greater than 58. The third lens group 4 moves along the second optical axis O2, and the moving distance ΔL and the total optical length TTL satisfy: ΔL / TTL = 0.12. At infinite focus, the total optical length TTL and the image half-height IMH satisfy: IMH / TTL = 0.18. At infinite focus, the effective focal length EFL and the total optical length TTL satisfy: EFL / TTL = 0.65. At infinite focus, the effective focal length f and the entrance pupil diameter EPD satisfy: f / EPD = 1.99.

[0194] FIG14 is an MTF curve diagram of the camera module 100 shown in FIG12 in an infinite distance state.

[0195] FIG14 illustrates 11 image fields of different sizes, including 0 mm, 0.360 mm, 0.720 mm, 1.080 mm, 1.440 mm, 1.800 mm, 2.160 mm, 2.520 mm, 2.880 mm, 3.240 mm, and 3.600 mm. Each image field size corresponds to two line segments, solid and dashed, representing different imaging beam directions: the meridional beam and the sagittal beam. As shown in FIG14 , within the spatial frequency range of 0 LP / mm to 125 LP / mm, the imaging clarity of the camera module 100 in the infinite state is above 0.4 for all image field ranges under both the meridional beam and the sagittal beam.

[0196] FIG15 is an MTF curve diagram of the camera module 100 shown in FIG13 in a macro state.

[0197] Figure 15 illustrates nine image fields of varying sizes: 0mm, 0.360mm, 0.720mm, 1.080mm, 1.440mm, 1.800mm, 2.160mm, 2.520mm, and 2.880mm. Each image field size corresponds to two line segments, solid and dashed, representing different imaging beam directions: the meridional beam and the sagittal beam, respectively. As shown in Figure 15 , within the spatial frequency range of 0LP / mm to 80LP / mm, the camera module 100 in macro mode has an imaging clarity of 0.4 or higher for both the meridional and sagittal beams for 80% of the image field.

[0198] From the MTF curves of FIG. 14 and FIG. 15 , it can be seen that the camera module 100 has good imaging quality when shooting in both the infinity state and the macro state.

[0199] Figure 16 is a partial structural diagram of another embodiment of the camera module 100 shown in Figure 2. Figure 17 is a schematic diagram of an embodiment of the camera module 100 shown in Figure 16 in use. The camera module 100 shown in Figure 16 is in a shooting mode in an infinity state. The camera module 100 shown in Figure 17 is in a shooting mode in a macro state. It should be noted that the camera modules 100 shown in Figures 16 and 17 include most of the technical features of the camera module 100 shown in Figure 8. The following mainly describes the difference between the two, and most of the same contents between the two will not be repeated.

[0200] As shown in Figures 16 and 17, the camera module 100 may include an optical lens 10 and a photosensitive element 22. The photosensitive element 22 is located on the image side of the optical lens 10. The optical lens 10 may include an aperture (not shown), a first lens group 1, a first reflector 2, a second lens group 3, a third lens group 4, and a second reflector 5 arranged from the object side to the image side. Among them, the first reflector 2 may be a reflective prism. The second reflector 5 may be a reflective prism. The second lens group 3 is a focusing lens group of the camera module 100. During the focusing process of the optical lens 10 switching from a distant view to a close view, the second lens group 3 moves along the optical axis toward the object side. The third lens group 4 is a fixed lens group.

[0201] In this embodiment, the main difference from the camera module 100 shown in Figure 8 is that the optical lens 10 is provided with two devices for turning the light path, namely the first reflecting device 2 and the second reflecting device 5. The second reflecting device 5 is arranged on the image side of the third lens group 4 and the object side of the photosensitive element 22. In this way, the optical lens 10 can fold the optical axis direction twice, so that the photosensitive surface of the photosensitive element 22 can be arranged flat, that is, the photosensitive surface of the photosensitive element 22 can be parallel to the YZ plane (as shown in Figure 16). Compared with the upright camera module 100 shown in Figure 8, the length of the camera module 100 in the Z-axis direction is smaller. In addition, the photosensitive surface of the photosensitive element 22 is parallel to the YZ plane, and the photosensitive element 22 is less restricted in the Y-axis and Z-axis directions. Therefore, the photosensitive element 22 can be set larger, which is suitable for use scenarios that require a large photosensitive surface. The light propagation inside the camera module 100 undergoes a first turn through the first reflecting device 2 and a second turn through the second reflecting device 5. The optical axis O includes a first portion O1 from the object side surface of the first lens L1 to the reflective surface of the first reflective device 2, a second portion O2 from the reflective surface of the first reflective device 2 to the reflective surface of the second reflective device 5, and a third portion O3 from the reflective surface of the second reflective device 5 to the photosensitive surface of the photosensitive element 22.

[0202] In addition, the camera module 100 does not include the optical filter 21. It is understood that the camera module 100 does not include the separate optical filter 21, eliminating the need for additional space for the optical filter 21, thereby reducing the size of the camera module 100. In some embodiments, the camera module 100 can implement a filtering function by performing surface treatment or material treatment on some optical elements in the optical lens 10 (e.g., any lens in the first lens group 1, the second lens group 3, or the third lens group 4).

[0203] The first lens group 1 includes one lens, hereinafter referred to as the first lens L1. The second lens group 3 includes five lenses: the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6. The third lens group 4 includes three lenses: the seventh lens L7, the eighth lens L8, and the ninth lens L9. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, and the ninth lens L9 are spaced in order from the object side to the image side along the optical axis.

[0204] Please refer to Tables 4a to 4c. Table 4a shows the optical parameters of the camera module 100 shown in FIG16. Table 4b shows the curvature radius, thickness, focal length, refractive index, and Abbe coefficient of each lens in one embodiment of the optical lens 10 shown in FIG16. Table 4c shows the conic coefficient and aspheric coefficient of each lens in one embodiment of the optical lens 10 shown in FIG16.

[0205] Table 4a

[0206] Table 4b

[0207] Table 4c

[0208] In this embodiment, the first lens L1 to the ninth lens L9 may include 18 aspheric surfaces, and the surface shapes z of all even-order aspheric surfaces may be defined by, but not limited to, the following aspheric curve equations:

[0209] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c = 1 / R is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric coefficient.

[0210] In this embodiment, the first lens group 1 has positive optical power and a focal length of 51.00 mm, the second lens group 3 has positive optical power and a focal length of 12.56 mm, and the third lens group 4 has negative optical power and a focal length of -11.65 mm.

[0211] The light refracting capabilities of all lenses in the first lens group 1 and the lens closest to the first reflector 2 in the second lens group 3 satisfy the following requirements:

[0212] The Abbe numbers of the fourth lens element L4 and the eighth lens element L8 are greater than 58. The second lens group 3 moves along the second optical axis O2, and the moving distance ΔL and the total optical length TTL satisfy: ΔL / TTL = 0.068. At infinite focus, the total optical length TTL and the image half height IMH satisfy: IMH / TTL = 0.18. At infinite focus, the effective focal length EFL and the total optical length TTL satisfy: EFL / TTL = 0.63. At infinite focus, the effective focal length f and the entrance pupil diameter EPD satisfy: f / EPD = 1.72.

[0213] FIG18 is an MTF curve diagram of the camera module 100 shown in FIG16 in an infinite distance state.

[0214] FIG18 illustrates a total of 10 image fields of different sizes: 0mm, 0.612mm, 1.224mm, 1.836mm, 2.447mm, 3.059mm, 3.671mm, 4.283mm, 4.895mm, and 5.507mm. Each image field size corresponds to two line segments, solid and dashed, representing different imaging beam directions, namely the meridional beam and the sagittal beam. As shown in FIG18 , within the spatial frequency range of 0LP / mm to 125LP / mm, the imaging clarity of the camera module 100 in the infinite state is above 0.4 for all image field ranges under the meridional beam and the sagittal beam.

[0215] FIG19 is an MTF curve diagram of the camera module 100 shown in FIG17 in the macro state.

[0216] Figure 19 illustrates eight image fields of varying sizes: 0mm, 0.612mm, 1.224mm, 1.836mm, 2.447mm, 3.059mm, 3.671mm, and 4.283mm. Each image field size corresponds to two line segments, solid and dashed, representing different imaging beam directions: the meridional beam and the sagittal beam, respectively. As shown in Figure 19, within the spatial frequency range of 0LP / mm to 60LP / mm, the camera module 100 in macro mode has an imaging clarity of 0.4 or higher for both the meridional and sagittal beams for 80% of the image field.

[0217] From the MTF curves of FIG. 18 and FIG. 19 , it can be seen that the camera module 100 has good imaging quality when shooting in both the infinity state and the macro state.

[0218] Figure 20 is a partial structural diagram of another embodiment of the camera module 100 shown in Figure 2. It should be noted that the camera module 100 shown in Figure 20 includes most of the technical features of the camera module 100 shown in Figure 16. The following mainly describes the differences between the two, and most of the common contents between the two are not repeated.

[0219] As shown in Figure 20, the camera module 100 may include an optical lens 10 and a photosensitive element 22. The photosensitive element 22 is located on the image side of the optical lens 10. The optical lens 10 may include an aperture (not shown) arranged from the object side to the image side, a first lens group 1, a first reflector 2, a second lens group 3, and a second reflector 5. The second lens group 3 is a fixed lens group. The first reflector 2 is a reflective prism. The second reflector 5 is a reflective prism.

[0220] In this embodiment, the main difference from the camera module 100 shown in Figure 16 is that the optical lens 10 only has one lens group (second lens group 3) between the first reflector 2 and the second reflector 5, and the second lens group 3 is a fixed lens group.

[0221] The first lens group 1 includes one lens, hereinafter referred to as the first lens L1 . The second lens group 3 includes five lenses, namely the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , and the sixth lens L6 .

[0222] Please refer to Tables 5a to 5c. Table 5a shows the optical parameters of the camera module 100 shown in FIG20. Table 5b shows the curvature radius, thickness, focal length, refractive index, and Abbe coefficient of each lens in one embodiment of the optical lens 10 shown in FIG20. Table 5c shows the conic coefficient and aspheric coefficient of each lens in one embodiment of the optical lens 10 shown in FIG20.

[0223] Table 5a

[0224] Table 5b

[0225] Table 5c

[0226] In this embodiment, the first lens L1 to the sixth lens L6 may include 12 aspheric surfaces, and the surface shapes z of all even-order aspheric surfaces may be defined by, but not limited to, the following aspheric curve equations:

[0227] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c = 1 / R is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric coefficient.

[0228] In this embodiment, the first lens group 1 has positive refractive power and a focal length of 38.02 mm, and the second lens group 3 has positive refractive power and a focal length of 32.98 mm.

[0229] The light refracting capabilities of all lenses in the first lens group 1 and the lens closest to the first reflector 2 in the second lens group 3 satisfy the following requirements:

[0230] The Abbe number of first lens element L1 is greater than 58. At infinite focus, the total optical length TTL and the image half height IMH satisfy: IMH / TTL = 0.17. At infinite focus, the effective focal length EFL and the total optical length TTL satisfy: EFL / TTL = 0.61. At infinite focus, the effective focal length f and the entrance pupil diameter EPD satisfy: f / EPD = 2.03.

[0231] FIG21 is an MTF curve diagram of the camera module 100 shown in FIG20 in an infinite distance state.

[0232] FIG21 illustrates a total of 12 image fields of different sizes, namely 0mm, 0.512mm, 1.024mm, 1.534mm, 2.044mm, 2.552mm, 3.059mm, 3.583mm, 4.083mm, 4.561mm, 5.054mm, and 5.335mm. Each size of the image field corresponds to two line segments, solid and dotted, representing different imaging beam directions, namely the meridional beam and the sagittal beam. As shown in FIG21 , within the spatial frequency range of 0LP / mm to 125LP / mm, the imaging clarity of all image field ranges of the camera module 100 in the infinite state under the meridional beam and the sagittal beam is above 0.4. The shooting of the camera module 100 in the infinite state has good imaging quality.

[0233] Figure 22 is a partial structural diagram of another embodiment of the camera module 100 shown in Figure 2. Figure 23 is a schematic diagram of an embodiment of the camera module 100 shown in Figure 22 in use. The camera module 100 shown in Figure 22 is in a shooting mode in an infinity state. The camera module 100 shown in Figure 23 is in a shooting mode in a macro state. It should be noted that the camera modules 100 shown in Figures 22 and 23 include most of the technical features of the camera module 100 shown in Figure 16. The following mainly describes the difference between the two, and most of the same contents of the two will not be repeated.

[0234] As shown in Figures 22 and 23, the camera module 100 may include an optical lens 10 and a photosensitive element 22. The photosensitive element 22 is located on the image side of the optical lens 10. The optical lens 10 may include an aperture (not shown), a first lens group 1, a first reflector 2, a second lens group 3, a third lens group 4, and a second reflector 5 arranged from the object side to the image side. Among them, the second reflector 5 is a reflective prism. The second lens group 3 is a focusing lens group of the camera module 100. During the focusing process of the optical lens 10 switching from a distant view to a close view, the second lens group 3 moves along the optical axis toward the object side. The third lens group 4 is a fixed lens group.

[0235] In this embodiment, the main difference from the camera module 100 shown in FIG16 is that the first reflective element 2 is a reflective mirror. It will be appreciated that a reflective mirror is smaller than a reflective prism and is lighter, contributing to the lightweight nature of the camera module 100. In other embodiments, the first reflective element 2 may also be a reflective film. And / or, the second reflective element 5 may also be a reflective mirror or a reflective film.

[0236] It is understood that the first reflective element 2 can be a reflective mirror, a reflective prism, a reflective film, or other structure capable of changing the optical path. The second reflective element 5 can be a reflective mirror, a reflective prism, a reflective film, or other structure capable of changing the optical path. The first reflective element 2 and the second reflective element 5 can be the same or different, and those skilled in the art can configure them as needed.

[0237] The first lens group 1 includes one lens, hereinafter referred to as the first lens L1. The second lens group 3 includes four lenses: the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5. The third lens group 4 includes three lenses: the sixth lens L6, the seventh lens L7, and the eighth lens L8. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8 are spaced in order from the object side to the image side along the optical axis.

[0238] Please refer to Tables 6a to 6c. Table 6a shows the optical parameters of the camera module 100 shown in FIG22. Table 6b shows the curvature radius, thickness, focal length, refractive index, and Abbe coefficient of each lens in one embodiment of the optical lens 10 shown in FIG22. Table 6c shows the conic coefficient and aspheric coefficient of each lens in one embodiment of the optical lens 10 shown in FIG22.

[0239] Table 6a

[0240] Table 6b

[0241] Table 6c

[0242] In this embodiment, the first lens L1 to the eighth lens L8 may include 16 aspheric surfaces, and the surface shapes z of all even-order aspheric surfaces may be defined by, but not limited to, the following aspheric curve equations:

[0243] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c = 1 / R is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric coefficient.

[0244] In this embodiment, the first lens group 1 has positive optical power and a focal length of 66.99 mm, the second lens group 3 has positive optical power and a focal length of 11.18 mm, and the third lens group 4 has negative optical power and a focal length of -8.84 mm.

[0245] The light refracting capabilities of all lenses in the first lens group 1 and the lens closest to the first reflector 2 in the second lens group 3 satisfy the following requirements:

[0246] The second lens group 3 moves along the second optical axis O2, with the moving distance ΔL and the total optical length TTL satisfying: ΔL / TTL = 0.055. At infinite focus, the total optical length TTL and the image half height IMH satisfy: IMH / TTL = 0.19. At infinite focus, the effective focal length EFL and the total optical length TTL satisfy: EFL / TTL = 0.66. At infinite focus, the effective focal length f and the entrance pupil diameter EPD satisfy: f / EPD = 1.81.

[0247] Figure 24 is an MTF curve diagram of the camera module 100 shown in Figure 22 in the infinite state. Figure 25 is an MTF curve diagram of the camera module 100 shown in Figure 23 in the macro state.

[0248] Figures 24 and 25 illustrate 10 image fields of different sizes, including 0mm, 0.625mm, 1.250mm, 1.875mm, 2.500mm, 3.125mm, 3.750mm, 4.375mm, 5.000mm, and 5.625mm. Each image field size corresponds to two line segments, solid and dashed, representing different imaging beam directions, namely the meridional beam and the sagittal beam. As shown in Figure 24, within the spatial frequency range of 0LP / mm to 100LP / mm, the imaging clarity of 80% of the image field range of the camera module 100 in the infinite state is above 0.4 in both the meridional beam and the sagittal beam. As shown in Figure 25, within the spatial frequency range of 0LP / mm to 75LP / mm, the imaging clarity of 80% of the image field range of the camera module 100 in the macro state is above 0.4 in both the meridional beam and the sagittal beam.

[0249] From the MTF curves of FIG. 24 and FIG. 25 , it can be seen that the camera module 100 has good imaging quality when shooting in both the infinity state and the macro state.

[0250] Figure 26 is a partial structural diagram of another embodiment of the camera module 100 shown in Figure 2. Figure 27 is a schematic diagram of an embodiment of the camera module 100 shown in Figure 26 in use. The camera module 100 shown in Figure 26 is in a shooting mode in an infinity state. The camera module 100 shown in Figure 27 is in a shooting mode in a macro state. It should be noted that the camera modules 100 shown in Figures 26 and 27 include most of the technical features of the camera module 100 shown in Figure 16. The following mainly describes the differences between the two, and most of the same contents between the two will not be repeated.

[0251] As shown in Figures 26 and 27, the camera module 100 may include an optical lens 10 and a photosensitive element 22. The photosensitive element 22 is located on the image side of the optical lens 10. The optical lens 10 may include an aperture (not shown), a first lens group 1, a first reflector 2, a second lens group 3, a third lens group 4, and a second reflector 5 arranged from the object side to the image side. Among them, the first reflector 2 is a reflective prism. The second reflector 5 is a reflective prism. The second lens group 3 is a focusing lens group of the camera module 100. During the focusing process of the optical lens 10 switching from a distant view to a close view, the second lens group 3 moves along the optical axis toward the object side. The third lens group 4 is a fixed lens group.

[0252] The first lens group 1 includes one lens, hereinafter referred to as the first lens L1. The second lens group 3 includes three lenses: the second lens L2, the third lens L3, and the fourth lens L4. The third lens group 4 includes three lenses: the fifth lens L5, the sixth lens L6, and the seventh lens L7. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are spaced in order from the object side to the image side along the optical axis.

[0253] In this embodiment, the main difference from the camera module 100 shown in Figure 16 is that the light-emitting surface 11 of the first lens group 1 contacts and is fixed to the light-entering surface 201 of the first reflector 2. It can be understood that the light-emitting surface 11 of the first lens group 1 is the light-emitting surface of the lens in the first lens group 1 that is closest to the first reflector 2. For example, as shown in Figure 26, when the first lens group 1 includes one lens, the light-emitting surface of the first lens L1 is the light-emitting surface 11 of the first lens group 1. The light-emitting surface of the first lens L1 contacts and is fixed to the light-entering surface 201 of the first reflector 2. In this way, compared with the solution in which the first lens L1 and the first reflector 2 are spaced apart in the embodiment described above, the first lens L1 of this embodiment is connected to the first reflector 2, which can eliminate the space between the first lens L1 and the first reflector 2, and the volume of the camera module 100 can be smaller, which is conducive to the miniaturization of the camera module 100. Moreover, when the first lens L1 and the first reflective element 2 are arranged along the X-axis direction, the height of the camera module 100 in the X-axis direction can be reduced, and the camera module 100 can be suitable for use in an electronic device 1000 with a smaller X-axis thickness.

[0254] In other embodiments, when the first lens group 1 includes multiple lenses, along the optical axis, the light-emitting surface of the lens closest to the first reflector 2 among the multiple lenses is the light-emitting surface 11 of the first lens group 1 .

[0255] In some embodiments, the first lens L1 can be fixedly connected to the first reflector 2 by gluing. The light-emitting surface 11 of the first lens group 1 and the light-entering surface 201 of the first reflector 2 match in shape. It is understandable that the thickness of the glue layer is small and almost negligible, so it can also be considered that the first lens L1 is in direct contact with the first reflector 2. In some embodiments, the first lens can be integrated with the first reflector 2 through an integrated molding structure. It should be noted that the two components are integrated by an integrated molding process, which means that in the process of forming one of the two components, the component is connected to the other component, and there is no need to connect the two components together through further processing (such as bonding, welding, snap connection, screw connection).

[0256] Please refer to Tables 7a to 7c. Table 7a shows the optical parameters of the camera module 100 shown in FIG26. Table 7b shows the curvature radius, thickness, focal length, refractive index, and Abbe coefficient of each lens in one embodiment of the optical lens 10 shown in FIG26. Table 7c shows the conic coefficient and aspheric coefficient of each lens in one embodiment of the optical lens 10 shown in FIG26.

[0257] Table 7a

[0258] Table 7b

[0259] Table 7c

[0260] In this embodiment, the first lens L1 to the seventh lens L7 may include 13 aspheric surfaces, and the surface shapes z of all even-order aspheric surfaces may be defined by, but not limited to, the following aspheric curve equations:

[0261] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c = 1 / R is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric coefficient.

[0262] In this embodiment, the first lens group 1 has positive optical power and a focal length of 50.61 mm. The second lens group 3 has positive optical power and a focal length of 12.42 mm. The third lens group 4 has negative optical power and a focal length of -9.61 mm.

[0263] The light refracting capabilities of all lenses in the first lens group 1 and the lens closest to the first reflector 2 in the second lens group 3 satisfy the following requirements:

[0264] The Abbe number of first lens element L1 is greater than 58. The second lens group 3 moves along the second optical axis O2, and the moving distance ΔL and the total optical length TTL satisfy: ΔL / TTL = 0.061. At infinite focus, the total optical length TTL and the image half-height IMH satisfy: IMH / TTL = 0.18. At infinite focus, the effective focal length EFL and the total optical length TTL satisfy: EFL / TTL = 0.66. At infinite focus, the effective focal length f and the entrance pupil diameter EPD satisfy: f / EPD = 1.97.

[0265] Figure 28 is an MTF curve diagram of the camera module 100 shown in Figure 26 in the infinite state. Figure 29 is an MTF curve diagram of the camera module 100 shown in Figure 27 in the macro state.

[0266] Figures 28 and 29 illustrate 12 image fields of different sizes, including 0mm, 0.511mm, 1.022mm, 1.534mm, 2.045mm, 2.556mm, 3.067mm, 3.578mm, 4.090mm, 4.601mm, 5.112mm, and 5.500mm. Each image field size corresponds to two line segments, solid and dashed, representing different imaging beam directions, namely the meridional beam and the sagittal beam. As shown in Figure 28, within the spatial frequency range of 0LP / mm to 125LP / mm, the camera module 100 in the infinite state has an imaging clarity of more than 0.4 in all image field ranges under the meridional beam and the sagittal beam. As shown in FIG29 , within the spatial frequency range of 0LP / mm to 110LP / mm, the camera module 100 in the macro state has an imaging clarity of all image field ranges in the meridional and sagittal direction beams that is above 0.4.

[0267] From the MTF curves of FIG. 28 and FIG. 29 , it can be seen that the camera module 100 has good imaging quality when shooting in both the infinity state and the macro state.

[0268] Figure 30 is a partial structural diagram of another embodiment of the camera module 100 shown in Figure 2. It should be noted that the camera modules 100 shown in Figures 30 and 31 include most of the technical features of the camera module 100 shown in Figure 16. The following mainly describes the differences between the two, and most of the common features between the two are not repeated here.

[0269] As shown in Figure 30, the camera module 100 may include an optical lens 10 and a photosensitive element 22. The photosensitive element 22 is located on the image side of the optical lens 10. The optical lens 10 may include an aperture (not shown) arranged from the object side to the image side, a first lens group 1, a first reflector 2, a second lens group 3, and a second reflector 5. The second lens group 3 is a fixed lens group. The first reflector 2 is a reflective prism. The second reflector 5 is a reflective prism.

[0270] The main difference between this embodiment and the camera module 100 shown in FIG16 is that the first lens group 1 includes two lenses, namely the first lens L1 and the second lens L2. The optical lens system 10 has only one lens group (the second lens group 3) disposed between the first reflector 2 and the second reflector 5. The second lens group 3 is a fixed lens group.

[0271] The second lens group 3 includes five lenses, namely a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7.

[0272] Please refer to Tables 8a to 8c. Table 8a shows the optical parameters of the camera module 100 shown in FIG30. Table 8b shows the curvature radius, thickness, focal length, refractive index, and Abbe coefficient of each lens in one embodiment of the optical lens 10 shown in FIG30. Table 8c shows the conic coefficient and aspheric coefficient of each lens in one embodiment of the optical lens 10 shown in FIG30.

[0273] Table 8a

[0274] Table 8b

[0275] Table 8c

[0276] In this embodiment, the first lens L1 to the seventh lens L7 may include 14 aspheric surfaces, and the surface shape z of all even-order aspheric surfaces may be defined by, but not limited to, the following aspheric curve equations:

[0277] Among them, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c = 1 / R is the aspheric vertex spherical curvature, K is the cone coefficient, and Ai represents the i-th order aspheric coefficient.

[0278] In this embodiment, the first lens group 1 has positive optical power and a focal length of 25.51 mm, and the second lens group 3 has negative optical power and a focal length of -1213.02 mm.

[0279] The light refracting capabilities of all lenses in the first lens group 1 and the lens closest to the first reflector 2 in the second lens group 3 satisfy the following requirements:

[0280] The Abbe number of first lens element L1 is greater than 58. At infinite focus, the total optical length TTL and the image half height IMH satisfy: IMH / TTL = 0.19. At infinite focus, the effective focal length EFL and the total optical length TTL satisfy: EFL / TTL = 0.72. At infinite focus, the effective focal length f and the entrance pupil diameter EPD satisfy: f / EPD = 2.07.

[0281] FIG31 is an MTF curve diagram of the camera module 100 shown in FIG30 in an infinite distance state.

[0282] Figure 31 shows a total of 11 image fields of different sizes, including 0mm, 0.522mm, 1.046mm, 1.573mm, 2.104mm, 2.641mm, 3.184mm, 3.734mm, 4.293mm, 4.861mm, and 5.439mm. Each size of the image field corresponds to two line segments, solid and dotted, representing different imaging beam directions, namely the meridional beam and the sagittal beam. As shown in Figure 31, within the spatial frequency range of 0LP / mm to 125LP / mm, the imaging clarity of all image field ranges of the camera module 100 in the infinite state under the meridional beam and the sagittal beam is above 0.4. The shooting of the camera module 100 in the infinite state has good imaging quality.

[0283] The present application introduces several implementation methods of the optical lens 10 in combination with the accompanying drawings. The optical lens 10 includes a first lens group 1, a first reflector 2, and a second lens group 3 arranged from the object side to the image side. The first reflector 2 changes the direction of the optical axis from a first direction to a second direction, and the second direction intersects with the first direction. The optical lens 10 also includes a first drive assembly 30, which is used to drive the first lens group 1 and the first reflector 2 to move to achieve anti-shake. The first lens group 1 includes i lenses, and the second lens group 3 includes at least one lens. The i lenses of the first lens group 1 and the lens closest to the first reflector in the second lens group 3, a total of i+1 lenses, have a light refracting ability that satisfies:

[0284] It is understandable that in the traditional solution of achieving anti-shake by driving the photosensitive element 22 to move, an anti-shake drive mechanism needs to be set up around the image sensor. The structural design and circuit design of the anti-shake drive mechanism are relatively complex and require a large installation space. The present application uses the first drive component 30 to drive the first lens group 1 and the first reflector 2 for anti-shake, and there is no need to reserve installation space for the anti-shake drive mechanism around the photosensitive element 22. The first drive component 30 that drives the first lens group 1 and the first reflector 2 has a simpler structure and a smaller volume, so the module size of the camera module 100 can be reduced, which is conducive to the miniaturization of the camera module 100. In addition, the drive structure design and circuit design of the first lens group 1 and the first reflector 2 are less difficult, which can reduce the difficulty of setting up the first drive component 30 and reduce the manufacturing cost.

[0285] The larger the radius of curvature of a lens, the smaller its ability to refract light, and the smaller the lens thickness, the smaller its ability to refract light. When the first drive assembly 30 drives the first lens group 1 and the first reflector 2 for anti-shake, the light refracting ability of all lenses in the first lens group 1 and the first lens in the second lens group 3 is set to be small, which is conducive to balancing aberrations and improving the imaging quality of the optical lens 10. Therefore, the camera module 100 of the present application has excellent imaging quality while being miniaturized.

[0286] It can be understood that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other, and any combination of features in different embodiments is also within the scope of protection of the present application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0287] It should be understood that all the above drawings are illustrative illustrations of the present application and do not represent the actual size of the product. Moreover, the dimensional ratios between the components in the drawings are not intended to limit the actual product of the present application.

[0288] 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: The optical lens comprises a first lens group, a first reflecting device, and a second lens group arranged from the object side to the image side, wherein the first reflecting device changes the direction of the optical axis from a first direction to a second direction, and the second direction intersects with the first direction; The optical lens further includes a first driving assembly, wherein the first driving assembly is used to drive the first lens group and the first reflective device to move, so as to achieve anti-shake of the optical lens; The first lens group includes i lenses, the second lens group includes at least one lens, the i lenses in the first lens group and the lens closest to the first reflector in the second lens group total i+1 lenses, and the light refracting capability satisfies: Where, 1≤n≤i+1, n is a positive integer, ct n is the center thickness of the nth lens, r1 n The curvature radius of the first surface of the nth lens is r2, which faces the object side. n This represents the radius of curvature of the second surface of the n-th lens, where the second surface of the lens faces the image side.

2. The optical lens according to claim 1, wherein: At least one of the lenses included in the first lens group and the second lens group has an Abbe number greater than 58.

3. The optical lens according to claim 1 or 2, characterized in that: The first reflective device is a reflective prism, a reflective mirror or a reflective film.

4. The optical lens according to any one of claims 1 to 3, characterized in that The optical lens further includes a second reflective device, which is located on the image side of the second lens group. The second reflective device is used to change the direction of the optical axis from the second direction to a third direction, and the second direction and the third direction intersect.

5. The optical lens according to any one of claims 1 to 4, characterized in that: The optical lens further includes a stop located on the object side of the first lens group.

6. The optical lens according to any one of claims 1 to 5, characterized in that: The light-emitting surface of the first lens group contacts and is fixed to the light-incident surface of the first reflective device.

7. The optical lens according to any one of claims 1 to 5, characterized in that: The first driving component is connected to the first lens group, and the first driving component is connected to the first reflecting device.

8. The optical lens according to any one of claims 1 to 5, characterized in that: The first lens group is fixed to the first reflecting device, and the first driving assembly is connected to the first lens group or the first reflecting device.

9. The optical lens according to any one of claims 1 to 8, characterized in that: The first lens group has positive refractive power.

10. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens further includes a third lens group, which is located on the image side of the second lens group. The second lens group or the third lens group is a focusing lens group of the optical lens.

11. The optical lens according to claim 10, wherein: The first lens group has positive refractive power, the second lens group has positive refractive power, and the third lens group has negative refractive power.

12. A camera module, characterized in that: The optical lens comprises a photosensitive component and the optical lens according to any one of claims 1 to 9, wherein the photosensitive component is located on the image side of the optical lens.

13. The camera module according to claim 12, wherein: The effective optical focal length EFL and total optical length TTL of the camera module meet the following requirements: 0.1 <EFL / TTL<1。 14. The camera module according to claim 12 or 13, wherein: The total optical length TTL and half image height IMH of the camera module meet the following requirements: 0.1 <IMH / TTL<0.5。 15. The camera module according to any one of claims 12 to 14, characterized in that: The optical lens further includes a third lens group, the third lens group is located on the image side of the second lens group, and the second lens group or the third lens group is a focusing lens group of the optical lens; The distance that the focusing lens group moves along the second direction is ΔL, and ΔL and the total optical length TTL of the camera module satisfy the formula: 0.01<ΔL / TTL<0.

4.

16. An electronic device, characterized in that: It comprises a shell and a camera module according to any one of claims 12 to 15, wherein the camera module is installed on the shell.

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