Optical lens, camera module and electronic device

Abstract

An optical lens (1), a camera module (30) and an electronic device (100). The optical lens (1) comprises a first optical element (G1) and a second optical element (G2), wherein the second optical element (G2) is located on an image side of the first optical element (G1); the first optical element (G1) comprises at least one lens; and the second optical element (G2) comprises a first surface (31), a second surface (32) and a third surface (33), which are connected to one another. After passing through the first optical element (G1), an external light beam enters the second optical element (G2) through the first surface (31) and is reflected by the second surface (32), is then reflected by the third surface (33), and finally exits the second optical element (G2) through the second surface (32). By means of designing the structure of the second optical element (G2), the height of the second optical element (G2) is relatively low, so that the optical lens (1) can be designed to be relatively low, thereby facilitating reducing the height of the camera module (30) when the optical lens (1) is applied to the camera module (30).

Description

Optical lenses, camera modules and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 8, 2024, with application number 202410177143.3 and application name “Optical lens, camera module and electronic device”. This application claims priority to the Chinese patent application filed with the China Patent Office on February 23, 2024, with application number 202410205525.2 and application name “Optical lens, camera module and electronic device”. The entire contents of both applications are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of photographing equipment, and specifically to an optical lens, a camera module and an electronic device. Background Art

[0003] In recent years, with the advancement of technology, the demand for mobile phone photography has increased significantly. For example, demands for a wider range of focal lengths, higher resolution, and higher image quality have placed higher design requirements on mobile phone lenses. However, due to the limitations of mobile phone size, how to ensure high image quality while reducing the height of mobile phone lenses is a major issue. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide an optical lens, a camera module and an electronic device. The optical lens provided in the embodiments of the present application has a relatively small size.

[0005] In a first aspect, an embodiment of the present application provides an optical lens. A camera module includes the optical lens, and an electronic device includes the camera module. The optical lens includes a first optical element and a second optical element, the second optical element being located on the image side of the first optical element; the first optical element includes at least one lens; the second optical element includes a first surface, a second surface, and a third surface connected to each other, the first surface facing the first optical element, a first angle α between the first surface and the second surface, a second angle β between the third surface and the second surface, the sum of the first angle α and the second angle β is not equal to 90°, and the second angle β is less than 45°; after passing through the first optical element, the external light beam is incident on the second optical element from the first surface, reflected on the second surface, and then reflected on the third surface before exiting the second optical element from the second surface.

[0006] It can be understood that in an electronic device, the thickness direction of the electronic device can be perpendicular to the optical axis direction of the first optical element. The thickness of the electronic device usually needs to be designed to be smaller, and the space on the thickness of the electronic device is limited, so the thickness of the optical lens needs to be smaller.

[0007] Exemplarily, the height direction of the optical lens is parallel to the first direction, and the length direction of the optical lens is parallel to the second direction; the optical lens may also have a third direction, and the width direction of the optical lens is parallel to the third direction. The first direction is defined as being perpendicular to the optical axis of the first optical element and parallel to the plane where the normal direction of the first surface and the normal direction of the second surface are located, that is, the first direction is parallel to the thickness direction of the electronic device. The second direction is parallel to the optical axis of the first optical element, that is, the second direction is parallel to the length direction of the electronic device.

[0008] By providing a second optical element, the second optical element reflects the light twice, thereby folding the light path, making the optical lens have a shorter physical length, shortening the size of the optical lens in the second direction, and realizing a miniaturized design of the optical lens.

[0009] Furthermore, by designing the structure of the second optical element, the height of the second optical element is made smaller, so that the height of the optical lens can be designed to be lower. When the optical lens is used in a camera module, it is beneficial to reduce the height of the camera module.

[0010] In addition, due to the structural setting of the second optical element, the first surface and the second surface have an angle, and the light enters the second optical element from the first surface and exits the second optical element from the second surface. Therefore, the second surface and the optical axis direction (first direction) of the first optical element generally have an angle. Therefore, the second surface is less restricted in size in the direction perpendicular to the optical axis direction of the first optical element (second direction), and the area of ​​the second surface can be set larger, so that a photosensitive element with a larger photosensitive area that matches the second surface can be selected, so that when the overall volume of the optical lens is limited, the large target surface design of the camera module can be realized, thereby improving the imaging capability of the camera module.

[0011] In some embodiments, the sum of the first angle α and the second angle β is less than 90°.

[0012] In this embodiment, since the second angle β is less than 45°, most of the area of ​​the first surface can be effectively utilized for incident light, the upper area of ​​the second surface is mainly used for reflecting light, and the lower area of ​​the second surface is mainly used for transmitting light. The utilization rate of the second surface is relatively high. Therefore, the height of the first surface in the first direction can be set smaller, so that the height of the first optical element is synchronously set smaller, which is beneficial to reducing the overall height of the optical lens and is beneficial to the thinning of the camera module.

[0013] In addition, when the height of the first surface is low, the side of the third surface close to the first optical element is higher than the side of the third surface away from the first optical element, which is equivalent to the side of the third surface close to the first optical element being raised, so that the reflection point of the light on the third surface is closer to the first surface, which is beneficial to reducing the length of the second optical element in the second direction.

[0014] In some embodiments, the first angle α and the second angle β satisfy: |α-2×β|≤10° or |α-2×β|=0°.

[0015] In this embodiment, the angle between the optical axis of the light beam emitted from the second surface and the second surface is close to vertical, which is beneficial to reducing aberration and facilitating imaging of the scene light.

[0016] In some embodiments, the first angle α and the second angle β satisfy: |α-2×β|=0°.

[0017] In this embodiment, the optical axis of the light beam is emitted at an angle perpendicular to the second surface, the light path is relatively simple, and the imaging effect of the scene light on the photosensitive element is better.

[0018] In some embodiments, the refractive index of the second optical element is greater than (1 / sin α).

[0019] In this embodiment, light incident on the second optical element is totally reflected by the second surface, which has high reflection efficiency. Furthermore, light reflected from the second surface does not pass through and enter the photosensitive element, thus preventing any interference with the image formation of the photosensitive element. This also facilitates the installation of a larger photosensitive element. Furthermore, the second surface does not interfere with light reflected from the third surface and then passing through the second surface, simplifying the manufacture of the second optical element and reducing costs.

[0020] In some embodiments, the first surface has an optical center point, the first surface and the second surface have a first intersection point, the second surface and the third surface have a second intersection point, and the distance s1 from the first intersection point to the optical center point in the first direction and the distance s2 from the second intersection point to the optical center point in the first direction satisfy: s2>s1.

[0021] Exemplarily, the distance s1 from the first intersection point to the optical center point in the first direction and the distance s2 from the second intersection point to the optical center point in the first direction satisfy: 1<(s2 / s1)<3.

[0022] In this embodiment, the optical axis of the incident light on the first surface can be positioned closer to the first intersection point. The light will primarily utilize the upper portion of the second optical element for a first reflection and the lower portion of the second optical element for a second reflection, thereby fully utilizing both the upper and lower portions of the second optical element. Furthermore, by properly setting the first angle α and the second angle β of the second optical element, the optical axis of the light beam can be positioned closer to the center point of the second optical element in the first direction, thereby further increasing the utilization rate of the first surface.

[0023] In some embodiments, the relationship between the width w of the second optical element in the second direction and the height h1 of the second optical element in the first direction satisfies: 1<(w / h1)<1.75.

[0024] In this embodiment, the width of the second optical element in the second direction is greater than the height h1 of the second optical element in the first direction, which is beneficial for making the second surface have a larger area, thereby facilitating the setting of a photosensitive element with a larger area. At the same time, by reasonably setting the ratio between the width w and the height h1, the second optical element has both a smaller height h1 and a smaller width w, so that the camera module has a smaller height and a smaller TTL.

[0025] In some embodiments, the optical lens has a maximum imaging circle diameter mic, and the height h2 of the first surface in the first direction and the maximum imaging circle diameter mic satisfy the following: 1.5<(mic / h2)<3.5.

[0026] In this embodiment, in the optical lens, the imaging circle diameter can be designed to be larger, so the photosensitive element can also be designed to be larger, thereby making the camera module have stronger imaging capabilities.

[0027] In some embodiments, one or more of the first surface, the second surface, and the third surface is a curved surface having optical power.

[0028] In this embodiment, the surface with optical power among the first surface, the second surface and the third surface can be used to balance the aberration, which is beneficial to improving the imaging quality of the camera module.

[0029] In some embodiments, a reflective film is fixedly connected to the third surface.

[0030] In this embodiment, the reflective film may be a metal film or a dielectric film, and the reflective film can improve the reflection efficiency of the third surface.

[0031] In some embodiments, the optical lens further includes a third optical element, which is located on the object side of the first optical element. The third optical element is used to change the propagation direction of the optical axis from a first direction to a second direction, where the first direction is perpendicular to the optical axis of the first optical element and parallel to the surface where the normal direction of the first surface and the normal direction of the second surface are located, and the second direction is parallel to the optical axis of the first optical element.

[0032] In this embodiment, the third optical element can change the propagation direction of the incident light of the optical lens, thereby facilitating the flexible arrangement of the optical lens. When the optical lens has a longer focal length, it is beneficial to apply the optical lens to thinner electronic devices.

[0033] In some embodiments, the third optical element includes at least one prism or a mirror.

[0034] In this embodiment, the light is reflected by a prism or a reflector, thereby changing the propagation direction of the light.

[0035] In some embodiments, the second optical element is configured such that, during optical lens stabilization, the third optical element rotates along an axis perpendicular to the plane containing the first direction and the second direction, and / or the second optical element rotates along an axis parallel to the first direction.

[0036] In this embodiment, by moving the third optical element, the light is kept relatively stable in the optical lens, thereby reducing imaging jitter and improving the imaging quality of the optical lens.

[0037] In some embodiments, the second optical element is configured such that during focusing of the optical lens, at least one lens in the optical focusing element moves along a first direction.

[0038] In this embodiment, the focusing of the optical lens is achieved by moving at least one lens in the first optical element, and zooming can be achieved without installing multiple optical lenses in the electronic device, thereby reducing the space occupied by the optical lens and saving costs.

[0039] In a second aspect, embodiments of the present application provide a camera module, which includes a photosensitive element and an optical lens as described in any of the above embodiments, wherein the photosensitive element is located on the image side of the optical lens.

[0040] In this embodiment, due to the structural setting of the second optical element, the second surface has an angle with the first direction, so the size restriction of the second surface in the first direction is relatively small, and the area of ​​the second surface can be set to be larger, so that a photosensitive element with a larger photosensitive area that matches the second surface can be selected. When the overall volume of the optical lens is limited, the camera module can be designed with a large target surface, thereby improving the imaging capability of the camera module.

[0041] In some embodiments, the first surface is perpendicular to the second direction, and the photosensitive element is perpendicular to a center line of the light beam emitted from the first optical element.

[0042] In this embodiment, due to the inclined second surface, the photosensitive element is less restricted by the height of the camera module, providing a larger installation space for the photosensitive element, facilitating flexible placement of the photosensitive element. In this embodiment, by arranging the positions of the second optical element and the photosensitive element, the image formation of scene light on the photosensitive element is facilitated, thereby minimizing aberrations and improving imaging quality.

[0043] In some embodiments, the photosensitive element is configured such that, during the focusing process of the camera module, the photosensitive element moves in a direction parallel to a photosensitive center line of the photosensitive element.

[0044] In this embodiment, by moving the photosensitive element, the focal plane of the photosensitive element and the optical lens can be directly aligned, thereby achieving precise focusing.

[0045] In some embodiments, during the camera module anti-shake process, the photosensitive element rotates around an axis parallel to the optical axis of the photosensitive element, and / or the photosensitive element moves along a plane perpendicular to the optical axis of the photosensitive element.

[0046] In this embodiment, by moving the photosensitive element, the light incident on the photosensitive element and the photosensitive element can be kept relatively stable, thereby reducing imaging jitter and improving the imaging quality of the camera module.

[0047] In a third aspect, embodiments of the present application provide an electronic device comprising an image processor and a camera module as described in any of the above embodiments, wherein the image processor is communicatively connected to the camera module and is configured to acquire image data from the camera module and process the image data.

[0048] In this embodiment, the electronic device has a strong photographing capability and can be thinner in size. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0050] FIG1 is a schematic structural diagram of an electronic device provided in some embodiments of the present application;

[0051] FIG2 is a schematic diagram of a partially exploded structure of the electronic device shown in FIG1 ;

[0052] FIG3 is a schematic structural diagram of the camera module shown in FIG1 ;

[0053] FIG4A is a schematic structural diagram of the camera module shown in FIG3 in some embodiments;

[0054] FIG4B is a schematic structural diagram of the camera module shown in FIG3 in other embodiments;

[0055] FIG5 is a schematic structural diagram of the second optical element shown in FIG4A in some embodiments;

[0056] FIG6 is a schematic structural diagram of the second optical element shown in FIG4A in other embodiments;

[0057] FIG7 is a schematic diagram of focusing of the camera module shown in FIG4A ;

[0058] FIG8 is a schematic diagram of the anti-shake function of the camera module shown in FIG4A ;

[0059] FIG9 is a schematic structural diagram of the camera module shown in FIG3 in other embodiments;

[0060] FIG10 is a schematic structural diagram of the camera module shown in FIG4A in some embodiments;

[0061] FIG11 is another structural schematic diagram of the camera module shown in FIG10 in some embodiments;

[0062] FIG12 is a diagram of simulated axial aberration of the camera module shown in FIG10 in a possible embodiment;

[0063] FIG13 is a diagram of simulated lateral chromatic aberration of the camera module shown in FIG10 in a possible embodiment;

[0064] FIG14 is a diagram of simulated optical distortion of the camera module shown in FIG10 in a possible embodiment;

[0065] FIG15 is a schematic structural diagram of the camera module shown in FIG4A in other embodiments;

[0066] FIG16 is a diagram of simulated axial aberration of the camera module shown in FIG15 in a possible embodiment;

[0067] FIG17 is a diagram of simulated lateral chromatic aberration of the camera module shown in FIG15 in a possible embodiment;

[0068] FIG18 is a diagram of simulated optical distortion of the camera module shown in FIG15 in a possible embodiment;

[0069] FIG19 is a schematic structural diagram of the camera module shown in FIG4A in yet other embodiments;

[0070] FIG20 is a diagram of simulated axial aberration of the camera module shown in FIG19 in a possible embodiment;

[0071] FIG21 is a diagram of simulated lateral chromatic aberration of the camera module shown in FIG19 in a possible embodiment;

[0072] FIG22 is a diagram of simulated optical distortion of the camera module shown in FIG19 in a possible embodiment. DETAILED DESCRIPTION

[0073] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this application are explained and described below.

[0074] 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.

[0075] A lens or lens group with positive optical power has a positive focal length and has the effect of converging light.

[0076] A lens or lens group with negative optical power has a negative focal length and has the effect of diverging light.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] The optical axis is a line perpendicular to the center of a lens. It also refers to the centerline of a light beam (light column) or the axis of symmetry of an optical system. The optical axis of a lens is the axis passing through the centers of each lens element. When light rays parallel to the optical axis enter a convex lens, an ideal convex lens should have all the rays converge at a single point behind the lens. This point is the focal point.

[0085] Focus is the point where parallel light rays converge after being refracted by a lens or group of lenses.

[0086] The image focal plane, also called the back focal plane or the second focal plane, is a plane passing through the image focus (also called the back focus or the second focus) and perpendicular to the optical axis of the system.

[0087] 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.

[0088] In optical instruments, the field of view (FOV) is the angle between the two edges of the maximum range through which the image of the measured object can pass, with the lens as the vertex. The field of view determines the visual range of the optical instrument. A larger field of view means a wider field of view and a smaller optical magnification.

[0089] The half-sensor diagonal 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.

[0090] Maximum Image Circle (MIC) is the diameter of the largest circle that can be imaged by a circular optical system. It is determined by the size of the sensor used.

[0091] 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 one 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 one point. Instead, there is a certain deviation from the position of the paraxial image point. These differences are collectively called aberrations.

[0092] 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.

[0093] Distortion, also known as distortion, refers to the degree to which the image formed by an optical system is distorted relative to the object itself. Distortion is caused by spherical aberration. The height at which the chief rays of light from different fields of view intersect the Gaussian image plane after passing through the optical system is not equal to the ideal image height. The difference between the two is the distortion. Therefore, distortion only changes the image position of off-axis object points on the ideal plane, distorting the image shape but not affecting image clarity.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] Field curvature describes the difference in the optical axis between the sharpest image point of non-central field rays and the sharpest image point of the central field rays after passing through an optical lens system. When a lens exhibits field curvature, the intersection of the entire light beam does not coincide with the ideal image point. Although a sharp image point can be obtained at each specific point, the entire image plane is a curved surface.

[0098] Optical image stabilization (OIS) relies on the structure and movement of special lenses or photosensitive elements to minimize image instability caused by operator shaking during use.

[0099] Auto Focus (AF) uses the principle of light reflection from an object. The reflected light is received by the sensor on the camera (module) and processed by a computer, driving the electric focus device to focus.

[0100] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0101] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed" and "connected" should be understood in a broad sense. For example, "connected" can mean detachably connected or non-detachably connected; it can mean directly connected or indirectly connected through an intermediary. "Multiple" means at least two.

[0102] The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "inside", "outside", "top", "bottom", "side", etc., are only references to the directions in the 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 referred device or element 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.

[0103] In the embodiments of the present application, the limitations of the relative position relationship mentioned, such as parallel, perpendicular, aligned, etc., are all for the current state of the art, rather than absolutely strict limitations, and a small amount of deviation is allowed, and it is possible to be approximately parallel, approximately perpendicular, approximately aligned, etc. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 degrees and 100 degrees.

[0104] 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.

[0105] The embodiments of the present application provide an optical lens, a camera module including the optical lens, and an electronic device including the camera module. The optical lens includes a first optical element and a second optical element, the second optical element being located on the image side of the first optical element; the first optical element includes at least one lens; the second optical element includes a first surface, a second surface, and a third surface connected to each other, the first surface facing the first optical element, a first angle α being formed between the first surface and the second surface, a second angle β being formed between the third surface and the second surface, the sum of the first angle α and the second angle β not being equal to 90°, and the second angle β being less than 45°; after passing through the first optical element, an external light beam is incident on the second optical element from the first surface, is reflected from the second surface, and then, after being reflected from the third surface, is emitted from the second optical element from the second surface.

[0106] In this case, the second optical element folds the light path, resulting in a shorter physical length of the optical lens. This shortens the size of the optical lens in the second direction, enabling a miniaturized design of the optical lens. Furthermore, the height of the optical lens can be designed to be lower, which helps reduce the height of the camera module when the optical lens is used in the camera module. Furthermore, a large target surface can be designed for the camera module, improving the imaging capability of the camera module.

[0107] Electronic devices may include mobile phones, tablet computers, laptops, cameras, wearable devices, and other devices with photo or video recording capabilities. Wearable devices may include wristbands, watches, glasses, and other devices. Electronic devices can be used to shoot and record images, and the lenses of electronic devices can shoot at different object distances.

[0108] Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the structure of an electronic device 100 provided in some embodiments of the present application, and Figure 2 is a schematic diagram of a partially exploded structure of the electronic device 100 shown in Figure 1. In this embodiment, the electronic device 100 is described as a mobile phone. It will be understood that Figures 1 and 2 only schematically illustrate some components included in the electronic device 100, and the actual shape, actual size, actual position and actual structure of these components are not limited to Figures 1 and 2. The electronic device 100 may also include more or fewer components than those in Figures 1 and 2.

[0109] In some embodiments, the electronic device 100 may include a screen 10, a housing 20, and a camera module 30. The screen 10 is used to display images, videos, and the like. The screen 10 includes a translucent cover 101 and a display screen 102. The translucent cover 101 and the display screen 102 are stacked and fixedly connected. The translucent cover 101 is primarily used to protect and dustproof the display screen 102. The material of the translucent cover 101 includes, but is not limited to, glass. The display screen 102 may be a flexible display screen or a rigid display screen. For example, the display screen 102 may be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (OLED) display screen, a micro organic light-emitting diode (OLED) display screen, a micro organic light-emitting diode (OLED) display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0110] Exemplarily, the housing 20 is used to protect the internal electronic components of the electronic device 100. The housing 20 includes a back cover 201, a frame 202, and a camera decorative cover 203. The back cover 201 is located on the side of the display screen 102 away from the transparent cover plate 101, and is stacked with the transparent cover plate 101 and the display screen 102. The frame 202 is fixed to the back cover 201. Exemplarily, the frame 202 can be fixed to the back cover 201 by adhesive. The frame 202 can also be an integrally molded structure with the back cover 201, that is, the frame 202 and the back cover 201 are a single unitary structure. The frame 202 is located between the back cover 201 and the transparent cover plate 101. The transparent cover plate 101 can be fixed to the frame 202 by adhesive. The transparent cover plate 101, the back cover 201, and the frame 202 enclose an internal storage space of the electronic device 100. The internal storage space accommodates the display screen 102.

[0111] For example, the camera module 30 is used to take photos / videos. For example, the camera module 30 can be located in the internal storage space of the electronic device 100. The number of camera modules 30 can be one or more, for example, two are used as an example in this embodiment. The camera module 30 can be used as a rear camera module 30 or a front camera module 30.

[0112] Exemplarily, the light incident surface of the camera module 30 faces the back cover 201. The back cover 201 is provided with a mounting opening 2011, and the camera decorative cover 203 covers and is fixed to the mounting opening 2011. The camera decorative cover 203 is used to protect the camera module 30. In some embodiments, the camera decorative cover 203 protrudes to the side of the back cover 201 away from the light-transmitting cover 101. In this way, the camera decorative cover 203 can increase the installation space of the camera module 30 in the thickness direction of the electronic device 100. In other embodiments, the camera decorative cover 203 can also be flush with the back cover 201 or recessed into the internal accommodation space of the electronic device 100.

[0113] For example, a light-transmitting window 2031 may be provided on the camera decorative cover 203. The light-transmitting window 2031 allows scene light to enter the light-incident surface of the camera module 30. That is, the light passes through the back cover 201 and enters the camera module 30.

[0114] In this embodiment, the camera module 30 is used as the rear camera module 30 of the electronic device 100. For example, the two camera modules 30 may be camera module 301 and camera module 302, respectively. Camera module 301 may be used as the rear main camera module 30, and camera module 302 may be used as the rear telephoto camera module 30. In other embodiments, the electronic device 100 may further include another camera module 30, which may be used as a rear wide-angle camera module 30.

[0115] In other embodiments, the light incident surface of the camera module 30 faces the transparent cover plate 101. A light path avoidance hole is provided on the display screen 102. The light path avoidance hole allows scene light to pass through the transparent cover plate 101 and then enter the light incident surface of the camera module 30. In this way, the camera module 30 serves as the front camera module 30 of the electronic device 100.

[0116] In some embodiments, as shown in FIG2 , the electronic device 100 further includes a circuit board 50 and an image processor 60, and the circuit board 50 and the image processor 60 are located in the internal accommodation space of the electronic device 100, and the image processor 60 is fixed to the circuit board 50 and electrically connected to the circuit board 50. The image processor 60 is communicatively connected to the camera module 30. The image processor 60 is used to obtain image data from the camera module 30 and process the image data. Among them, the communication connection between the camera module 30 and the image processor 60 may include data transmission through electrical connection methods such as wiring, and data transmission may also be achieved through coupling and other methods. It is understandable that the camera module 30 and the image processor 60 may also achieve communication connection through other methods that can achieve data transmission.

[0117] In some embodiments, the electronic device 100 may further include an analog-to-digital converter (also referred to as an A / D converter, not shown). The analog-to-digital converter is connected between the camera module 30 and the image processor 60. The analog-to-digital converter is used to convert the signal generated by the camera module 30 into a digital image signal and transmit it to the image processor 60. The image processor 60 then processes the digital image signal and ultimately displays the image or video on the screen 10.

[0118] In some embodiments, the electronic device 100 may further include a memory (not shown), which is communicatively connected to the image processor 60. The image processor 60 processes the digital image signal and then transfers the image to the memory, so that the image can be retrieved from the memory and displayed on the screen 10 at any time when the image is needed. In some embodiments, the image processor 60 may also compress the processed digital image signal before storing it in the memory to save memory space.

[0119] In other embodiments, the electronic device 100 may not include the screen 10 and / or the camera decorative cover 203 .

[0120] The electronic device 100 may have a width direction X, a length direction Y, and a thickness direction Z, wherein the length direction Y is perpendicular to the width direction X, and the thickness direction Z is perpendicular to the width direction X and the length direction Y. The display screen 102 and the housing 20 may be arranged relative to each other in the thickness direction Z of the electronic device 100. In this case, the housing 20 may be perpendicular to the thickness direction Z of the electronic device 100.

[0121] It is understood that the installation position of the camera module 30 of the electronic device 100 in the embodiments shown in Figures 1 and 2 is merely illustrative, and this application does not strictly limit the installation position of the camera module 30. In some other embodiments, the camera module 30 may also be installed in other positions of the electronic device 100, for example, the camera module 30 may be installed in the upper middle or upper right corner of the back of the electronic device 100. In some other embodiments, the electronic device 100 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 30 may also be provided on the auxiliary component.

[0122] Please refer to FIG. 2 and FIG. 3 in combination. FIG. 3 is a simplified structural diagram of the camera module 30 shown in FIG. 1 .

[0123] In some embodiments, the camera module 30 may include an optical lens 1 and a photosensitive element 2 , wherein the photosensitive element 2 is located on the image side of the optical lens 1 .

[0124] The photosensitive element 2 (also called an image sensor) is a semiconductor chip having hundreds of thousands to millions of photodiodes on its surface, which generate electric charges when exposed to light.

[0125] Photosensitive element 2 utilizes the photoelectric conversion function of a photoelectric device to convert the light image on its photosensitive surface into an electrical signal proportional to the light image. The photosensitive surface of photosensitive element 2 faces optical lens 1. Photosensitive element 2 can be a charge-coupled device (CCD), a complementary metal-oxide semiconductor (CMOS), a phototransistor, or a thin-film transistor. A CCD is made of a highly sensitive semiconductor material and can convert light into electrical charge. A CCD consists of many photosensitive units, typically measured in megapixels. When light strikes the CCD surface, each photosensitive unit reflects an electrical charge on the component. The signals generated by all the photosensitive units are combined to form a complete image. CMOS devices primarily utilize semiconductors made of silicon and germanium, resulting in the coexistence of semiconductors with N (negative charge) and P (positive charge) levels within the CCD. The current generated by these two complementary effects can be recorded and interpreted as an image by a processing chip.

[0126] Optical lens 1 primarily utilizes the principle of lens refraction to create an image. Light from a scene passes through optical lens 1, forming a clear image on the focal plane. This image is then recorded by photosensitive element 2 located on the focal plane. For example, optical lens 1 may be a telephoto lens, enabling better capture of distant objects.

[0127] The optical lens 1 can be a vertical lens or a periscope lens. This embodiment is described by taking the periscope lens as an example. When the optical lens 1 is a periscope lens, it can be better applied to thin electronic devices.

[0128] In some embodiments, the camera module 30 may further include a filter 3. The filter 3 may be located between the optical lens 1 and the photosensitive element 2.

[0129] Filter 3 is used to filter out unwanted wavelengths in the light, preventing false colors or moire on the photosensitive element 2, thereby improving its effective resolution and color reproduction. By way of example, filter 3 may be an infrared filter. In this embodiment, filter 3 is a standalone component. In other embodiments, filter 3 may be eliminated and filtering may be achieved by surface or material treatment of at least one optical element of the telephoto lens. This application does not strictly limit the specific embodiments of the components or structures used to achieve filtering.

[0130] In some embodiments, the camera module 30 may further include a housing 4. The photosensitive element 2 and the optical lens 1 may be mounted in the interior of the housing 4. The housing 4 may have a light-transmitting opening 41 for transmitting light, so that light from external objects can enter the optical lens 1.

[0131] In this embodiment, an external light beam can pass through the optical lens 1 and illuminate the photosensitive surface of the photosensitive element 2. Exemplarily, the operating principle of the camera module 30 is as follows: light reflected from the subject passes through the optical lens 1 and the filter 3, generating an optical image that is projected onto the photosensitive surface of the photosensitive element 2. The photosensitive element 2 converts the optical image into an electrical signal (i.e., an analog image signal) and transmits it to an analog-to-digital converter, which then converts the signal into a digital image signal that is then transmitted to the image processor 60 (see FIG. 2 ).

[0132] Please refer to FIG. 3 and FIG. 4A in combination. FIG. 4A is a schematic structural diagram of the camera module 30 shown in FIG. 3 in some embodiments.

[0133] In some embodiments, the optical lens 1 includes a first optical element G1, a second optical element G2, and a third optical element G3, wherein the third optical element G3 is located on the object side of the first optical element G1, and the second optical element G2 is located on the image side of the first optical element G1.

[0134] The third optical element G3 may include a direction-changing element 11, which is used to change the propagation direction of the optical axis from a first direction to a second direction. The first direction is perpendicular to the optical axis of the first optical element G1 and parallel to the plane containing the normal direction of the first surface 31 and the normal direction of the second surface 32. In other words, the first direction is parallel to the thickness direction Z. The second direction is parallel to the optical axis of the first optical element G1, in other words, the second direction is parallel to the length direction Y. After passing through the direction-changing element 11, the optical axis of the light beam is changed to the second direction, and the light beam then enters the first optical element G1 from the second direction.

[0135] Exemplarily, the optical lens 1 may have a width direction, a length direction, and a height direction, the length direction may be perpendicular to the width direction, and the height direction may be perpendicular to the width direction and the length direction. Among them, the height direction of the optical lens 1 is parallel to the first direction, and the length direction of the optical lens 1 is parallel to the second direction; the optical lens 1 may also have a third direction, and the width direction of the optical lens 1 is parallel to the third direction. Among them, when the camera module 30 is installed in an electronic device, the height direction of the optical lens 1 is parallel to the thickness direction Z of the electronic device; the width direction of the optical lens 1 may be parallel to the width direction X of the electronic device, and the length direction of the optical lens 1 may be parallel to the length direction Y of the electronic device, or the width direction of the optical lens 1 may be parallel to the length direction Y of the electronic device, and the length direction of the optical lens 1 may be parallel to the width direction X of the electronic device. In this case, the first direction may be parallel to the thickness direction Z of the electronic device, that is, the first direction is perpendicular to the back cover 201 of the electronic device (see Figure 2), and the third optical element G3, the first optical element G1, and the second optical element G2 are arranged in a direction perpendicular to the first direction, which has a larger arrangement space.

[0136] Exemplarily, the direction-changing element 11 may be a prism. The direction-changing element 11 may include an incident surface 111, a reflective surface 112, and an exit surface 113. The incident surface 111, the reflective surface 112, and the exit surface 113 may be connected in sequence, and the normals of the incident surface 111, the reflective surface 112, and the exit surface 113 may be coplanar. The incident surface 111 may be perpendicular to a first direction, the exit surface 113 may be perpendicular to a second direction, and the reflective surface 112 may be perpendicular to the angle bisector between the first and second directions. This allows light to enter the direction-changing element 11 from the incident surface 111, be reflected by the reflective surface 112, and then exit the direction-changing element 11 from the exit surface 113, changing the optical axis direction of the light beam from the first direction to the second direction.

[0137] The first optical element G1 may include at least one lens. The first optical element G1 is used to focus light. The first optical element G1 may not change the direction of the optical axis; the first optical element G1 may converge light, thereby achieving focusing of the optical lens 1. When the first optical element G1 includes multiple lenses, the multiple lenses may form a lens group, wherein at least one lens has positive optical power, and furthermore, a lens with negative optical power may be present, although this embodiment does not impose strict limitations on this.

[0138] Exemplarily, the first optical element G1 can be arranged between the third optical element G3 and the second optical element G2. The first optical element G1 can guide the converged light to the second optical element G2, thereby shortening the distance between the second optical element G2 and the photosensitive element 2, which is conducive to the miniaturization of the camera module 30.

[0139] The second optical element G2 may be a prism and is used to reflect light to fold the light path.

[0140] Illustratively, the second optical element G2 has a first surface 31, a second surface 32, and a third surface 33 that are interconnected. The first surface 31 faces the first optical element G1. A first angle α is formed between the first surface 31 and the second surface 32. A second angle β is formed between the third surface 33 and the second surface 32. The sum of the first angle α and the second angle β is not equal to 90°, and the second angle β is less than 45°. Light emitted from the first optical element G1 enters the second optical element G2 via the first surface 31, is reflected by the second surface 32, and then, after reflection from the third surface 33, exits the second optical element G2 via the second surface 32. For example, the first angle α can be 35°, 45°, 55°, 65°, 75°, etc. For example, the second angle β can be 17.5°, 22.5°, 27.5°, 32.5°, 38.5°, etc.

[0141] At this point, the first surface 31 transmits light, allowing it to enter the second optical element G2. The second surface 32 refracts light, causing it to undergo a primary folding within the second optical element G2. The second surface 32 also transmits light, causing it to exit the second optical element G2. The third surface 33 refracts light, causing it to undergo a secondary folding within the second optical element G2. In other words, light enters the second optical element G2 through the first surface 31, is reflected by the second surface 32, then reflects again by the third surface 33, and finally exits the second optical element G2 by reaching the second surface 32.

[0142] Moreover, since the second angle β is less than 45°, the second optical element G2 has a smaller size in the first direction, which is conducive to making the height of the first surface 31 in the first direction have a smaller size, thereby making the second optical element G2 have a smaller size in the first direction, that is, the second optical element G2 has a smaller height.

[0143] In some examples, the normal directions of the first surface 31, the second surface 32, and the third surface 33 may be coplanar. The normal directions of the first surface 31, the second surface 32, and the third surface 33 may also be parallel to a plane formed by the first direction and the second direction. In some examples, the first surface 31 may be perpendicular to the second direction.

[0144] It can be understood that in an electronic device, the thickness direction of the electronic device can be parallel to the first direction. The thickness of the electronic device usually needs to be designed to be smaller, and the space on the thickness of the electronic device is limited, so the optical lens 1 needs to be smaller in the first direction.

[0145] In the embodiment of the present application, the third optical element G3 can change the propagation direction of the incident light of the optical lens 1, thereby facilitating the flexible arrangement of the optical lens 1. When the optical lens 1 has a longer focal length, it is advantageous for the optical lens 1 to be used in thinner electronic devices. In the embodiment of the present application, by providing the second optical element G2, the second optical element G2 reflects the light twice, thereby folding the light path, making the optical lens 1 have a shorter physical length, and can shorten the size of the optical lens 1 in the second direction, thereby realizing a miniaturized design of the optical lens 1.

[0146] Furthermore, by designing the structure of the second optical element G2 , the height of the second optical element G2 is smaller, so that the height of the optical lens 1 can be designed to be lower. When the optical lens 1 is applied to the camera module 30 , it is beneficial to reduce the height of the camera module 30 .

[0147] In addition, due to the structural setting of the second optical element G2, the first surface 31 and the second surface 32 have an angle, and the light enters the second optical element G2 from the first surface 31 and exits the second optical element G2 from the second surface 32, so the second surface 32 has an angle with the first direction, so the second surface 32 is less restricted in size in the first direction, and the area of ​​the second surface 32 can be set larger, so that a photosensitive element 2 with a larger photosensitive area that matches the second surface 32 can be selected, so that when the overall volume of the optical lens 1 is limited, the large target surface design of the camera module 30 is realized, thereby improving the imaging capability of the camera module 30.

[0148] Please refer to FIG. 4B , which is a schematic structural diagram of the camera module 30 shown in FIG. 3 in other embodiments.

[0149] In some other embodiments, the optical lens 1 may not include the third optical element G3, and the optical lens 1 may include the first optical element G1 and the second optical element G2.

[0150] Exemplarily, the optical lens 1 includes a first optical element G1 and a second optical element G2, and the second optical element G2 is located on the image side of the first optical element G1; the first optical element G1 includes at least one lens; the second optical element G2 includes a first surface 31, a second surface 32 and a third surface 33 connected to each other, the first surface 31 faces the first optical element G1, and there is a first angle α between the first surface 31 and the second surface 32, and there is a second angle β between the third surface 33 and the second surface 32, the sum of the first angle α and the second angle β is not equal to 90°, and the second angle β is less than 45°; after passing through the first optical element G1, the external light beam is incident on the second optical element G2 from the first surface 31, reflected from the second surface 32, and then reflected from the third surface 33, and then emitted from the second optical element G2 from the second surface 32.

[0151] At this time, after the external light beam passes through the first optical element G1, it is incident on the second optical element G2 from the first surface 31, and is reflected by the second surface 32. After being reflected by the third surface 33, it is emitted from the second optical element G2 from the second surface 32. At this time, the optical lens 1 can be a straight-through lens. Among them, regarding the first optical element G1 and the second optical element G2, reference can be made to the relevant description of the embodiment of Figure 4A, and this embodiment will not be repeated here. In this embodiment, by providing the second optical element G2, the second optical element G2 reflects the light twice, so that the path of the light can be folded, so that the optical lens 1 has a shorter physical length, and the size of the optical lens 1 in the second direction can be shortened, thereby realizing a miniaturized design of the optical lens 1.

[0152] Furthermore, by designing the structure of the second optical element G2 , the height of the second optical element G2 is smaller, so that the height of the optical lens 1 can be designed to be lower. When the optical lens 1 is applied to the camera module 30 , it is beneficial to reduce the height of the camera module 30 .

[0153] In addition, due to the structural setting of the second optical element G2, the first surface 31 and the second surface 32 have an angle, and the light enters the second optical element G2 from the first surface 31 and exits the second optical element G2 from the second surface 32, so the second surface 32 has an angle with the first direction, so the second surface 32 is less restricted in size in the first direction, and the area of ​​the second surface 32 can be set larger, so that a photosensitive element 2 with a larger photosensitive area that matches the second surface 32 can be selected, so that when the overall volume of the optical lens 1 is limited, the large target surface design of the camera module 30 is realized, thereby improving the imaging capability of the camera module 30.

[0154] Please continue to refer to Figure 3 and Figure 4A.

[0155] In some embodiments, the photosensitive element 2 can be arranged toward the second surface 32 of the second optical element G2 and located on the image side of the second optical element G2. The photosensitive element 2 can be arranged parallel to the second surface 32, or at a certain angle to the second surface 32, which is not specifically limited in this embodiment. The size of the photosensitive element 2 can be smaller than the size of the second surface 32, and the photosensitive element 2 can be closer to the bottom side of the second optical element G2. The top side of the second optical element G2 is the side close to the light-transmitting opening 41 of the housing 4, and the bottom side of the second optical element G2 can be the side away from the light-transmitting opening 41 of the housing 4.

[0156] In some embodiments, the first surface 31 can be perpendicular to the second direction. The photosensitive element 2 can be perpendicular to the center line of the light beam emitted from the first optical element G1, that is, the photosensitive element 2 is perpendicular to the optical axis of the light emitted from the first optical element G1. At this time, the third surface 33 of the second optical element G2 faces the side of the housing 4 where the light-transmitting opening 41 is opened, and the photosensitive element 2 is equivalent to being arranged toward the second surface 32. Since the second surface 32 is arranged at an angle, the photosensitive element 2 is less restricted by the height of the camera module 30, and the installation space of the photosensitive element 2 is larger, which is conducive to flexible arrangement of the photosensitive element 2. In this embodiment, by setting the position of the second optical element G2 and the photosensitive element 2, it is possible to facilitate the imaging of the scene light on the photosensitive element 2, which is conducive to reducing aberrations and improving imaging effects.

[0157] In some embodiments, the sum of the first angle α and the second angle β may be less than 90°, which is equivalent to the angle between the first surface 31 and the third surface 33 being greater than 90°.

[0158] At this time, since the second angle β is less than 45°, most of the area of ​​the first surface 31 can be effectively utilized for incident light, the upper area of ​​the second surface 32 is mainly used for reflecting light, and the lower area of ​​the second surface 32 is mainly used for transmitting light. The utilization rate of the second surface 32 is relatively high. Therefore, the height of the first surface 31 in the first direction can be set smaller, so that the height of the third optical element G3 and the height of the first optical element G1 are synchronously set smaller, which is beneficial to reducing the overall height of the optical lens 1 and is beneficial to the thinning of the camera module 30.

[0159] In addition, when the height of the first surface 31 is relatively low, the side of the third surface 33 close to the first optical element G1 is higher than the side of the third surface 33 away from the first optical element G1, which is equivalent to the side of the third surface 33 close to the first optical element G1 being raised, so that the reflection point of the light on the third surface 33 is closer to the first surface 31, which is beneficial to reducing the length of the second optical element G2 in the second direction.

[0160] For example, the first angle α can be 55°, and the second angle β can be 27.5°, so the angle between the first surface 31 and the third surface 33 is 97.5°. In this case, the second optical element G2 itself has both a small height and a small length, which helps reduce the height and length of the optical lens 1 and also reduces the TTL. At the same time, the second surface 32 is longer and has a larger area, which facilitates the installation of a larger photosensitive element 2, thereby improving the performance of the camera module 30.

[0161] For example, the first angle α can be 45°, and the second angle β can be 22.5°, so the angle between the first surface 31 and the third surface 33 is 112.5°. In this case, the second optical element G2 itself has both a small height and a small length, which helps reduce the height and length of the optical lens 1 and also reduces the TTL. At the same time, the second surface 32 is longer and has a larger area, which facilitates the installation of a larger photosensitive element 2, thereby improving the performance of the camera module 30.

[0162] Compared with the setting of the right-angle prism, in this embodiment, based on the angle setting between the various surfaces of the second optical element G2, the second optical element G2 can have both a smaller height in the first direction and a smaller length in the second direction, thereby reducing the height and TTL of the optical lens 1, which is beneficial to the miniaturization design of the optical lens 1 and the miniaturization design of the camera module 30.

[0163] In some embodiments, the first angle α and the second angle β may satisfy: |α-2×β|≤10°. In this case, the angle between the optical axis of the light beam emitted from the second surface 32 and the second surface 32 is close to perpendicular, which is beneficial for reducing aberrations and facilitating imaging of the scene light.

[0164] For example, the first angle α and the second angle β satisfy the following: |α - 2 × β| = 0°. In this case, the optical axis of the light beam is emitted at a perpendicular angle to the second surface 32, resulting in a simpler optical path and a better imaging effect of the scene light on the photosensitive element 2. Furthermore, the photosensitive element 2 can be parallel to the second surface 32, which facilitates the positioning and installation of the photosensitive element 2 in the camera module 30.

[0165] In some embodiments, the refractive index of the second optical element G2 can be greater than (1 / sinα). In this case, light incident on the second optical element G2 will be totally reflected by the second surface 32. The second surface 32 has a high reflection efficiency, and the light reflected from the second surface 32 does not pass through and enter the photosensitive element 2. This does not affect the imaging of the photosensitive element 2, and facilitates the installation of a larger photosensitive element 2. Furthermore, the second surface 32 does not affect the light reflected from the third surface 33 and then transmitted through the second surface 32, thereby simplifying the manufacture of the second optical element G2 and reducing costs.

[0166] In some embodiments, the first surface has an optical center point P, the first surface 31 and the second surface 32 have a first intersection point A, and the second surface 32 and the third surface 33 have a second intersection point B. The distance s1 from the first intersection point A to the optical center point P in the first direction and the distance s2 from the second intersection point B to the optical center point P in the first direction satisfy the following relationship: s2 > s1. The optical center point P is also the intersection of the first surface 31 and the optical axis. In this case, the optical axis of the incident light on the first surface 31 can be positioned closer to the first intersection point A. The light will primarily reflect off the upper portion of the second optical element G2 for the first time and off the lower portion of the second optical element G2 for the second time, thereby fully utilizing both the upper and lower portions of the second optical element G2. Furthermore, by properly setting the first angle α and the second angle β of the second optical element G2, the optical axis of the light beam can be positioned closer to the center point of the second optical element G2 in the first direction, thereby increasing the utilization rate of the first surface 31.

[0167] For example, the distance s1 from the first intersection point A to the optical center point P in the first direction and the distance s2 from the second intersection point B to the optical center point P in the first direction satisfy the following relationship: 1<(s2 / s1)<3. For example, the value of s2 / s1 can be 1.5, 1.8, 2.1, 2.4, 2.7, etc.

[0168] In some embodiments, the relationship between the width w of the second optical element G2 in the second direction and the height h1 of the second optical element G2 in the first direction satisfies: 1<(w / h1)<1.75. For example, the value of w / h1 can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, etc. In this case, the width of the second optical element G2 in the second direction is greater than the height h1 of the second optical element G2 in the first direction, which is beneficial for making the second surface 32 have a larger area, thereby facilitating the arrangement of a larger area photosensitive element 2. At the same time, by reasonably setting the ratio between the width w and the height h1, the second optical element G2 has both a smaller height h1 and a smaller width w, so that the camera module 30 has a smaller height and a smaller TTL.

[0169] In some embodiments, the optical lens 1 has a maximum imaging circle diameter mic, and the height h2 of the first surface 31 in the first direction and the maximum imaging circle diameter mic satisfy the following relationship: 1.5 < (mic / h2) < 3.5. For example, the value of mic / h2 can be 1.8, 2.1, 2.4, 2.7, 3.0, etc. In this case, the imaging circle diameter of the optical lens 1 can be designed to be larger, and thus the photosensitive element 2 can also be designed to be larger, thereby providing the camera module 30 with stronger imaging capabilities.

[0170] In some embodiments, the object side surface of at least one lens of the optical lens 1 is convex. In the embodiments of the present application, by setting the object side surface of at least one lens of the optical lens 1 to be convex, it is beneficial to correct the spherical aberration of the optical lens 1 and improve the imaging quality of the optical lens 1.

[0171] In some embodiments, the lenses in the optical lens 1 may all be made of plastic, or all be made of glass, or some lenses may be made of plastic and some lenses may be made of glass.

[0172] In some embodiments, the object-side surface or the image-side surface of the lens in the optical lens 1 may be a spherical surface or an aspherical surface.

[0173] In some embodiments, when the object-side surface and / or image-side surface of some lenses in the optical lens 1 are aspherical, the object-side surface and / or image-side surface of some lenses may be defined using, but not limited to, the following aspherical surface formula:

[0174] Wherein, z is the sag of the aspheric surface, r is the normalized radial coordinate of the aspheric surface, r is equal to the actual radial coordinate of the aspheric surface divided by the normalized radius R (here is 1), c is the vertex spherical curvature of the aspheric surface, K is the quadratic surface constant, and A2, A3, A4, A5, and A6 are aspheric coefficients.

[0175] Please refer to FIG. 4A , FIG. 5 and FIG. 6 , FIG. 5 is a schematic structural diagram of the second optical element G2 shown in FIG. 4A in some embodiments, and FIG. 6 is a schematic structural diagram of the second optical element G2 shown in FIG. 4A in other embodiments.

[0176] In some embodiments, the second optical element G2 may further include a first side surface 34 and a second side surface 35. The first side surface 34 and the second side surface 35 are disposed opposite each other and may be arranged perpendicular to the first and second directions. The first side surface 34 and the second side surface 35 may both connect to the first surface 31, the second surface 32, and the third surface 33.

[0177] For example, the first side surface 34 and the second side surface 35 can be arranged in parallel, and in the optical lens 1, the first side surface 34 and the second side surface 35 can be parallel to the first direction and the second direction. The first side surface 34 and the second side surface 35 can serve as the fixed area of ​​the second optical element G2, and the first side surface 34 and the second side surface 35 can be fixedly connected by a fixing bracket (not shown), thereby fixing the second optical element G2 in the optical lens 1.

[0178] In some examples, the first surface 31 and the second surface 32, the first surface 31 and the third surface 33, and the second surface 32 and the third surface 33 can be adjacent and fixedly connected, so that the second optical element G2 forms a triangular prism. In this case, the second optical element G2 has a simple structure and is relatively easy to manufacture. In other embodiments, transition surfaces can exist between the first surface 31, the second surface 32, and the third surface 33. The transition surfaces can be curved or flat to reduce the volume of the second optical element G2.

[0179] In some examples, the surface of the third surface 33 may be coated with a reflective film. The reflective film is used to improve the reflection efficiency of the third surface 33. The reflective film can be a metal film or a dielectric film. The metal film can be made of a metal material such as silver, and the dielectric film can be made of a polymer material.

[0180] As shown in FIG5 , in some examples, the first surface 31, the second surface 32, and the third surface 33 can all be planes. The angle between the first surface 31, the second surface 32, and the third surface 33 can be the angle between the planes. In this case, the second optical element G2 has a simpler surface shape, making it easier to manufacture.

[0181] As shown in FIG6 , in some examples, one or more of the first surface 31 , the second surface 32 , and the third surface 33 may be surfaces with optical power. The optical power may be imparted to the corresponding surface by using a curved prism or a cemented lens. In this case, the surface with optical power is a curved surface, and the angle between the first surface 31 , the second surface 32 , and the third surface 33 may be calculated using the tangent plane at the intersection of the optical axis of the light beam and the surface as an equivalent plane. In this case, the surface with optical power among the first surface 31 , the second surface 32 , and the third surface 33 may be used to balance aberrations, which is beneficial to improving the imaging quality of the camera module 30 .

[0182] Please refer to FIG. 7 , which is a schematic diagram illustrating the focusing of the camera module 30 shown in FIG. 4A .

[0183] In some embodiments, during the focusing process of the optical lens 1 of the camera module 30, at least one lens in the first optical element G1 moves along the second direction. For example, the number of lenses in the first optical element G1 can be three, four, or five, etc., and the number of lenses in the first optical element G1 is not limited in the embodiments of the present application. By moving at least one lens in the first optical element G1 to achieve focusing of the optical lens 1, zooming can be achieved without installing multiple optical lenses 1 in the electronic device, thereby reducing the space occupied by the optical lens 1 and saving costs.

[0184] Exemplarily, the first optical element G1 comprises a single movable lens group, or a single movable lens group and at least one fixed lens group. During focusing of the optical lens 1, the movable lens group moves along the second direction. The single movable lens group reduces the number of motors required to drive the movable lens groups, compared to multiple movable lens groups, and reduces the size of the optical lens 1. Only one movable lens group needs to be moved for focusing, facilitating control and enabling precise focusing.

[0185] It can be understood that during the focusing process, part of the lenses or all of the lenses in the first optical element G1 may be moved.

[0186] In some embodiments, during the focusing process of the camera module 30, the photosensitive element 2 moves in a direction parallel to the photosensitive centerline of the photosensitive element 2. The photosensitive centerline of the photosensitive element 2 refers to the optical axis of the light beam incident on the photosensitive element 2. By moving the photosensitive element 2, the photosensitive element 2 can be directly aligned with the focal plane of the optical lens 1, thereby achieving precise focusing.

[0187] It is understandable that the movement of the photosensitive element 2 can be controlled by a focus motor to achieve focus.

[0188] In some embodiments, during the focusing process of the camera module 30, the first optical element G1 or the photosensitive element 2 can be independently controlled to achieve focusing, or the first optical element G1 and the photosensitive element 2 can be synchronously controlled to achieve focusing, which is not strictly limited in this embodiment.

[0189] Please refer to FIG. 8 , which is a schematic diagram of the anti-shake function of the camera module 30 shown in FIG. 4A .

[0190] In some embodiments, during the stabilization of the optical lens 1 of the camera module 30, the third optical element G3 may rotate about an axis parallel to the first direction, and / or the third optical element G3 may rotate about an axis perpendicular to the first and second directions. By moving the third optical element G3, the light in the optical lens 1 remains relatively stable, thereby reducing image jitter and improving the image quality of the optical lens 1.

[0191] In some embodiments, during the anti-shake process of the camera module 30, the photosensitive element 2 may rotate about an axis parallel to the photosensitive centerline of the photosensitive element 2, and / or the photosensitive element 2 may move along a plane perpendicular to the photosensitive centerline of the photosensitive element 2. By moving the photosensitive element 2, the light incident on the photosensitive element 2 and the photosensitive element 2 can be kept relatively stable, thereby reducing image jitter and improving the image quality of the camera module 30.

[0192] In some embodiments, during the anti-shake process of the camera module 30, the third optical element G3 or the photosensitive element 2 can be independently controlled to achieve anti-shake, or the first optical element G1 and the photosensitive element 2 can be synchronously controlled to achieve joint anti-shake. This embodiment does not strictly limit this.

[0193] It is understandable that the third optical element G3 or the photosensitive element 2 can be driven to move by a conventional anti-shake motor to achieve anti-shake of the camera module 30, which is beneficial to improving the imaging quality of the camera module 30.

[0194] Please refer to Figure 9, which is a schematic diagram of the structure of the camera module 30 shown in Figure 3 in other embodiments. The camera module 30 shown in the embodiment of Figure 9 can include most of the technical features of the camera module 30 shown in the embodiment of Figure 4A. The following mainly describes the differences between the two, and most of the technical content that is the same between the two is not repeated.

[0195] The main difference between the camera module 30 shown in the embodiment of Figure 9 and the camera module 30 shown in the embodiment of Figure 4A lies in the setting of the third optical element G3. The first optical element G1, the second optical element G2 and the photosensitive element 2 of the two can be the same. For details, please refer to the relevant description of the embodiment of Figure 4A, which will not be repeated in this embodiment.

[0196] In some embodiments, the third optical element G3 may further include a lens. The lens may be located on the image side or object side of the direction-changing element 11. The number of lenses may be one or multiple, and multiple lenses may form a lens cluster. The lens can increase the aperture and improve the optical path to enhance the imaging quality of the optical lens 1. It can also reduce the lateral length, thereby reducing the lateral length of the camera. In some examples, the lens can also be moved along its optical axis to facilitate focusing.

[0197] In some embodiments, the direction-changing element 11 may be a reflector, which can directly reflect light, changing the propagation direction of the light from a first direction to a second direction. In this case, the reflector is lighter and thinner than a prism, thereby reducing the weight of the optical lens 1. Furthermore, the reflector can be easily secured to other structures, providing high installation reliability.

[0198] The following will describe some specific but non-limiting examples of the present application in more detail through three embodiments in combination with Figures 10 to 22.

[0199] Example 1

[0200] Please refer to Figures 10 and 11 in combination. Figure 10 is a structural schematic diagram of the camera module 30 shown in Figure 4A in some embodiments, and Figure 11 is another structural schematic diagram of the camera module 30 shown in Figure 10 in some embodiments.

[0201] In this embodiment, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3. The optical lens 1, the photosensitive element 2, and the filter 3 are arranged from the object side to the image side. Light passes through the optical lens 1, the filter 3, and the photosensitive element 2 in sequence to form an image. The optical lens 1 may include a third optical element G3, a first optical element G1, and a second optical element G2.

[0202] The third optical element G3 includes a first lens L1, a direction-changing element 11, a second lens L2, and a third lens L3 arranged from the object side to the image side. The object-side surface of the first lens L1 forms the incident surface of the third optical element G3, and the incident surface is convex near the optical axis. The direction-changing element 11 includes a reflective surface 112, which is used to change the propagation direction of the optical axis. The image-side surface of the third lens L3 forms the exit surface of the first optical element G1, and the exit surface is concave near the optical axis. Light enters the third optical element G3 through the incident surface, is reflected by the reflective surface 112, and the reflective surface 112 is used to change the propagation direction of the optical axis, and exits the third optical element G3 through the exit surface. The direction-changing element 11 can be a prism. For example, the direction-changing element 11 can be a triangular prism.

[0203] For example, the optical power of the combination of the second lens L2 and the third lens L3 can be negative. The second lens L2 and the third lens L3 are used to balance aberrations.

[0204] The first optical element G1 includes a first lens group G21 and a second lens group G22 arranged from the object side to the image side. The first lens group G21 includes a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged from the object side to the image side. The second lens group G22 includes a seventh lens L7 and an eighth lens L8 arranged from the object side to the image side.

[0205] The first lens group G21 is a movable lens group, and the second lens group G22 is a fixed lens group. During the focusing process of the optical lens 1, the second lens group G22 can be moved toward the object side or the image side (moved along the second direction) to achieve focusing.

[0206] The second optical element G2 is a prism. The second optical element G2 has a first surface 31, a second surface 32, and a third surface 33 that are interconnected. The first surface 31 faces the first optical element G1. A first angle α is formed between the first surface 31 and the second surface 32, and a second angle β is formed between the third surface 33 and the second surface 32. The sum of the first angle α and the second angle β is not equal to 90°, and the second angle β is less than 45°. Light emitted from the first optical element G1 enters the second optical element G2 from the first surface 31, is reflected from the second surface 32, and then, after reflection from the third surface 33, exits the second optical element G2 from the second surface 32. For example, the first angle α is 55°, and the second angle β is 27.5°.

[0207] At this point, the first surface 31 transmits light, allowing it to enter the second optical element G2. The second surface 32 refracts light, causing it to undergo a primary folding within the second optical element G2. The second surface 32 also transmits light, causing it to exit the second optical element G2. The third surface 33 refracts light, causing it to undergo a secondary folding within the second optical element G2. In other words, light enters the second optical element G2 through the first surface 31, is reflected by the second surface 32, then reflects again by the third surface 33, and finally exits the second optical element G2 by reaching the second surface 32.

[0208] Moreover, since the second angle β is less than 45°, the second optical element G2 has a smaller size in the first direction, which is conducive to making the height of the first surface 31 in the first direction have a smaller size, thereby making the second optical element G2 have a smaller size in the first direction, that is, the second optical element G2 has a smaller height.

[0209] In the embodiment of the present application, the third optical element G3 can change the propagation direction of the incident light of the optical lens 1, thereby facilitating the flexible arrangement of the optical lens 1. When the optical lens 1 has a longer focal length, it is advantageous for the optical lens 1 to be used in thinner electronic devices. By providing the second optical element G2, the second optical element G2 reflects the light twice, thereby folding the light path, making the optical lens 1 have a shorter physical length, shortening the size of the optical lens 1 in the second direction, and realizing the miniaturization design of the optical lens 1.

[0210] Furthermore, by designing the structure of the second optical element G2 , the height of the second optical element G2 is smaller, so that the height of the optical lens 1 can be designed to be lower. When the optical lens 1 is applied to the camera module 30 , it is beneficial to reduce the height of the camera module 30 .

[0211] In addition, due to the structural setting of the second optical element G2, the first surface 31 and the second surface 32 have an angle, and the light enters the second optical element G2 from the first surface 31 and exits the second optical element G2 from the second surface 32, so the second surface 32 has an angle with the first direction, so the second surface 32 is less restricted in size in the first direction, and the area of ​​the second surface 32 can be set larger, so that a photosensitive element 2 with a larger photosensitive area that matches the second surface 32 can be selected, so that when the overall volume of the optical lens 1 is limited, the large target surface design of the camera module 30 is realized, thereby improving the imaging capability of the camera module 30.

[0212] Please refer to Table 1a, which shows the curvature radius, thickness, material, and surface coefficient of each lens, direction-changing element 11, prism, and filter 3 in a possible embodiment of the camera module 30 shown in Figure 10. Table 1b shows the aspheric coefficients of each lens in a possible embodiment of the optical lens 1 shown in Figure 10.

[0213] Among them, Infinity means infinity, E is a natural constant, and the material column shows the material brand.

[0214] Table 1a

[0215] Table 1b

[0216] The optical lens 1 of this embodiment includes 8 lenses and a total of 16 aspherical surfaces.

[0217] The aspheric surface of the optical lens 1 in Table 1a can be defined using, but not limited to, the following aspheric curve equation:

[0218] Wherein, z is the sag of the aspheric surface, r is the normalized radial coordinate of the aspheric surface, r is equal to the actual radial coordinate of the aspheric surface divided by the normalized radius R (here is 1), c is the vertex spherical curvature of the aspheric surface, K is the quadratic surface coefficient, and A2, A3, A4, A5, and A6 are the aspheric coefficients (see Table 1b).

[0219] The refractive index of the second optical element G2 is 1.5168 and the Abbe number is 61.467. It is understood that this embodiment shows the material grades of each element, and the corresponding refractive index and Abbe number can be determined, so this embodiment will not show them one by one.

[0220] Please refer to Table 1c, which shows the basic parameters of the camera module 30 shown in FIG10 in a possible embodiment.

[0221] Table 1c

[0222] Table 1c shows the relevant design parameters of the camera module 30 for imaging at infinity and 80 cm.

[0223] Wherein, f0 is the focal length of the optical lens 1, F is the aperture value, Y1 is the half image height, MIC is the maximum imaging circle diameter, h2 is the height of the first surface 31 of the second optical element G2 in the first direction, and TTL is the total length of the optical system.

[0224] In this embodiment, the value of mic / h2 is 2.13, the value of s2 / s1 is 1.46, and the value of w / h1 is 1.76. At this time, the optical center point P of the second surface 32 is located at the midpoint of the first surface 31 in the first direction.

[0225] Please refer to Figures 12 to 14. Figure 12 is a simulated axial aberration diagram of the camera module 30 shown in Figure 10 in a possible embodiment, Figure 13 is a simulated lateral chromatic aberration diagram of the camera module 30 shown in Figure 10 in a possible embodiment, and Figure 14 is a simulated optical distortion diagram of the camera module 30 shown in Figure 10 in a possible embodiment.

[0226] Figure 12 shows axial chromatic aberration curves for camera module 30 at infinity and near object distances, showing simulation results for the depth of focus of light at different reference wavelengths: 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm. The abscissa in the figure represents the deviation along the optical axis (mm), and the ordinate represents the normalized coordinate at the pupil. The figure demonstrates that axial aberration is controlled within a very narrow range.

[0227] Figure 13 shows lateral chromatic aberration curves for camera module 30 imaging at infinity and near object distances, showing simulation results for the XY coordinate positions of light at different reference wavelengths: 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm. The abscissa plots the chromatic aberration value (μm) and the ordinate plots the field of view angle. The dashed line indicates the diffraction-limited range, demonstrating a very narrow range for lateral chromatic aberration.

[0228] Figure 14 shows the distortion curves of camera module 30 for imaging at infinity and near object distances. These curves represent the relative deviation of the beam convergence point (actual image height) from the ideal image height for different reference wavelengths: 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm. The horizontal axis represents percentage (%), and the vertical axis represents field of view angle (degrees). The figure shows that camera module 30 maintains very low distortion.

[0229] Example 2

[0230] Please refer to FIG. 15 , which is a schematic structural diagram of the camera module 30 shown in FIG. 4A in other embodiments.

[0231] In this embodiment, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3. The optical lens 1, the photosensitive element 2, and the filter 3 are arranged from the object side to the image side. Light passes through the optical lens 1, the filter 3, and the photosensitive element 2 in sequence to form an image. The optical lens 1 may include a third optical element G3, a first optical element G1, and a second optical element G2.

[0232] The third optical element G3 includes a first lens L1, a direction-changing element 11, a second lens L2, and a third lens L3 arranged from the object side to the image side. The object-side surface of the first lens L1 forms the incident surface of the third optical element G3, and the incident surface is convex near the optical axis. The direction-changing element 11 includes a reflective surface 112, which is used to change the propagation direction of the optical axis. The image-side surface of the third lens L3 forms the exit surface of the first optical element G1, and the exit surface is concave near the optical axis. Light enters the third optical element G3 through the incident surface, is reflected by the reflective surface 112, which is used to change the propagation direction of the optical axis, and exits the third optical element G3 through the exit surface. The direction-changing element 11 can be a reflector.

[0233] For example, the combined thickness power of the second lens L2 and the third lens L3 may be negative. The second lens L2 and the third lens L3 are used to balance aberrations.

[0234] The first optical element G1 includes a first lens group G21 and a second lens group G22 arranged from the object side to the image side. The first lens group G21 includes a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged from the object side to the image side. The second lens group G22 includes a seventh lens L7 and an eighth lens L8 arranged from the object side to the image side.

[0235] The first lens group G21 is a movable lens group, and the second lens group G22 is a fixed lens group. During the focusing process of the optical lens 1, the second lens group G22 can be moved toward the object side or the image side (moved along the second direction) to achieve focusing.

[0236] The second optical element G2 is a prism. The second optical element G2 has a first surface 31, a second surface 32, and a third surface 33 that are interconnected. The first surface 31 faces the first optical element G1. A first angle α is formed between the first surface 31 and the second surface 32, and a second angle β is formed between the third surface 33 and the second surface 32. The sum of the first angle α and the second angle β is not equal to 90°, and the second angle β is less than 45°. Light emitted from the first optical element G1 enters the second optical element G2 from the first surface 31, is reflected from the second surface 32, and then, after reflection from the third surface 33, exits the second optical element G2 from the second surface 32. For example, the first angle α is 55°, and the second angle β is 27.5°.

[0237] At this point, the first surface 31 transmits light, allowing it to enter the second optical element G2. The second surface 32 refracts light, causing it to undergo a primary folding within the second optical element G2. The second surface 32 also transmits light, causing it to exit the second optical element G2. The third surface 33 refracts light, causing it to undergo a secondary folding within the second optical element G2. In other words, light enters the second optical element G2 through the first surface 31, is reflected by the second surface 32, then reflects again by the third surface 33, and finally exits the second optical element G2 by reaching the second surface 32.

[0238] Moreover, since the second angle β is less than 45°, the second optical element G2 has a smaller size in the first direction, which is conducive to making the height of the first surface 31 in the first direction have a smaller size, thereby making the second optical element G2 have a smaller size in the first direction, that is, the second optical element G2 has a smaller height.

[0239] In the embodiment of the present application, the third optical element G3 can change the propagation direction of the incident light of the optical lens 1, thereby facilitating the flexible arrangement of the optical lens 1. When the optical lens 1 has a longer focal length, it is advantageous for the optical lens 1 to be used in thinner electronic devices. By providing the second optical element G2, the second optical element G2 reflects the light twice, thereby folding the light path, making the optical lens 1 have a shorter physical length, shortening the size of the optical lens 1 in the second direction, and realizing the miniaturization design of the optical lens 1.

[0240] Furthermore, by designing the structure of the second optical element G2 , the height of the second optical element G2 is smaller, so that the height of the optical lens 1 can be designed to be lower. When the optical lens 1 is applied to the camera module 30 , it is beneficial to reduce the height of the camera module 30 .

[0241] In addition, due to the structural setting of the second optical element G2, the first surface 31 and the second surface 32 have an angle, and the light enters the second optical element G2 from the first surface 31 and exits the second optical element G2 from the second surface 32, so the second surface 32 has an angle with the first direction, so the second surface 32 is less restricted in size in the first direction, and the area of ​​the second surface 32 can be set larger, so that a photosensitive element 2 with a larger photosensitive area that matches the second surface 32 can be selected, so that when the overall volume of the optical lens 1 is limited, the large target surface design of the camera module 30 is realized, thereby improving the imaging capability of the camera module 30.

[0242] Please refer to Table 2a, which shows the curvature radius, thickness, material, and surface coefficient of each lens, direction-changing element 11, prism, and filter 3 in a possible embodiment of the camera module 30 shown in Figure 15. Table 2b shows the aspheric coefficients of each lens in a possible embodiment of the optical lens 1 shown in Figure 15.

[0243] Among them, Infinity means infinity, E is a natural constant, and the material column shows the material brand.

[0244] Table 2a

[0245] Table 2b

[0246] The optical lens 1 of this embodiment includes 8 lenses and a total of 16 aspherical surfaces.

[0247] The aspheric surface of the optical lens 1 in Table 2a can be defined using, but not limited to, the following aspheric curve equation:

[0248] Wherein, z is the sag of the aspheric surface, r is the normalized radial coordinate of the aspheric surface, r is equal to the actual radial coordinate of the aspheric surface divided by the normalized radius R (here is 1), c is the vertex spherical curvature of the aspheric surface, K is the quadratic surface coefficient, and A2, A3, A4, A5, and A6 are the aspheric coefficients (see Table 2b).

[0249] The refractive index of the second optical element G2 is 1.5168 and the Abbe number is 61.467. It is understood that this embodiment shows the material grades of each element, and the corresponding refractive index and Abbe number can be determined, so this embodiment will not show them one by one.

[0250] Please refer to Table 2c, which shows the basic parameters of the camera module 30 shown in Figure 15 in a possible embodiment.

[0251] Table 2c

[0252] Table 2c shows the relevant design parameters of the camera module 30 for imaging at infinity and 80 cm.

[0253] Wherein, f0 is the focal length of the optical lens 1, F is the aperture value, Y1 is the half image height, MIC is the maximum imaging circle diameter, h2 is the height of the first surface 31 of the second optical element G2 in the first direction, and TTL is the total length of the optical system.

[0254] In this embodiment, the value of mic / h2 is 1.90, the value of s2 / s1 is 1.46, and the value of w / h1 is 1.76. At this time, the optical center point P of the second surface 32 is located at the midpoint of the first surface 31 in the first direction.

[0255] Please refer to Figures 16 to 18. Figure 16 is a simulated axial aberration diagram of the camera module 30 shown in Figure 15 in a possible embodiment, Figure 17 is a simulated lateral chromatic aberration diagram of the camera module 30 shown in Figure 15 in a possible embodiment, and Figure 18 is a simulated optical distortion diagram of the camera module 30 shown in Figure 15 in a possible embodiment.

[0256] Figure 16 shows axial chromatic aberration curves for camera module 30 at infinity and near object distances, showing simulation results for the depth of focus of light at different reference wavelengths: 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm. The abscissa in the figure represents the deviation along the optical axis (mm), and the ordinate represents the normalized coordinate at the pupil. The figure demonstrates that axial aberration is controlled within a very narrow range.

[0257] Figure 17 shows lateral chromatic aberration curves for camera module 30 imaging at infinity and near object distances, showing simulation results for the XY coordinate positions of light at different reference wavelengths: 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm. The abscissa plots chromatic aberration values, while the ordinate plots field of view / image height. The dashed line indicates the diffraction-limited range, demonstrating a very narrow range for lateral chromatic aberration.

[0258] Figure 18 shows the distortion curves of camera module 30 for imaging at infinity and near object distances. These curves represent the relative deviation of the beam convergence point (actual image height) from the ideal image height for different reference wavelengths: 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm. The horizontal axis represents percentage (%), and the vertical axis represents field of view angle (degrees). The figure shows that camera module 30 maintains very low distortion.

[0259] Example 3

[0260] Please refer to FIG. 19 , which is a schematic structural diagram of the camera module 30 shown in FIG. 4A in yet other embodiments.

[0261] In this embodiment, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3. The optical lens 1, the photosensitive element 2, and the filter 3 are arranged from the object side to the image side. Light passes through the optical lens 1, the filter 3, and the photosensitive element 2 in sequence to form an image. The optical lens 1 may include a third optical element G3, a first optical element G1, and a second optical element G2.

[0262] The third optical element G3 includes a first lens L1, a second lens L2, and a redirecting element 11, arranged from the object side to the image side. The object-side surface of the first lens L1 forms the incident surface of the third optical element G3, and the incident surface is convex near the optical axis. The redirecting element 11 includes a reflective surface 112, which is used to change the propagation direction of the optical axis. Light enters the third optical element G3 through the incident surface and is reflected by the reflective surface 112, which changes the propagation direction of the optical axis. After passing through the reflective surface 112, the light is emitted from the third optical element G3. The redirecting element 11 may be a reflector.

[0263] The first optical element G1 includes a first lens group G21 and a second lens group G22 arranged from the object side to the image side. The first lens group G21 includes a third lens L3, a fourth lens L4, and a fifth lens L5 arranged from the object side to the image side. The second lens group G22 includes a sixth lens L6 and a seventh lens L7 arranged from the object side to the image side.

[0264] The first lens group G21 is a movable lens group, and the second lens group G22 is a fixed lens group. During the focusing process of the optical lens 1, the second lens group G22 can be moved toward the object side or the image side (moved along the second direction) to achieve focusing.

[0265] The second optical element G2 is a prism. The second optical element G2 has a first surface 31, a second surface 32, and a third surface 33 that are interconnected. The first surface 31 faces the first optical element G1. A first angle α is formed between the first surface 31 and the second surface 32, and a second angle β is formed between the third surface 33 and the second surface 32. The sum of the first angle α and the second angle β is not equal to 90°, and the second angle β is less than 45°. Light emitted from the first optical element G1 enters the second optical element G2 from the first surface 31, is reflected from the second surface 32, and then, after reflection from the third surface 33, exits the second optical element G2 from the second surface 32. For example, the first angle α is 55°, and the second angle β is 27.5°.

[0266] At this point, the first surface 31 transmits light, allowing it to enter the second optical element G2. The second surface 32 refracts light, causing it to undergo a primary folding within the second optical element G2. The second surface 32 also transmits light, causing it to exit the second optical element G2. The third surface 33 refracts light, causing it to undergo a secondary folding within the second optical element G2. In other words, light enters the second optical element G2 through the first surface 31, is reflected by the second surface 32, then reflects again by the third surface 33, and finally exits the second optical element G2 by reaching the second surface 32.

[0267] Moreover, since the second angle β is less than 45°, the second optical element G2 has a smaller size in the first direction, which is conducive to making the height of the first surface 31 in the first direction have a smaller size, thereby making the second optical element G2 have a smaller size in the first direction, that is, the second optical element G2 has a smaller height.

[0268] In the embodiment of the present application, the third optical element G3 can change the propagation direction of the incident light of the optical lens 1, thereby facilitating the flexible arrangement of the optical lens 1. When the optical lens 1 has a longer focal length, it is advantageous for the optical lens 1 to be used in thinner electronic devices. By providing the second optical element G2, the second optical element G2 reflects the light twice, thereby folding the light path, making the optical lens 1 have a shorter physical length, shortening the size of the optical lens 1 in the second direction, and realizing the miniaturization design of the optical lens 1.

[0269] Furthermore, by designing the structure of the second optical element G2 , the height of the second optical element G2 is smaller, so that the height of the optical lens 1 can be designed to be lower. When the optical lens 1 is applied to the camera module 30 , it is beneficial to reduce the height of the camera module 30 .

[0270] In addition, due to the structural setting of the second optical element G2, the first surface 31 and the second surface 32 have an angle, and the light enters the second optical element G2 from the first surface 31 and exits the second optical element G2 from the second surface 32, so the second surface 32 has an angle with the first direction, so the second surface 32 is less restricted in size in the first direction, and the area of ​​the second surface 32 can be set larger, so that a photosensitive element 2 with a larger photosensitive area that matches the second surface 32 can be selected, so that when the overall volume of the optical lens 1 is limited, the large target surface design of the camera module 30 is realized, thereby improving the imaging capability of the camera module 30.

[0271] Please refer to Table 3a, which shows the curvature radius, thickness, material, and surface coefficient of each lens, direction-changing element 11, prism, and filter 3 in a possible embodiment of the camera module 30 shown in Figure 19. Table 3b shows the aspheric coefficients of each lens in a possible embodiment of the optical lens 1 shown in Figure 19.

[0272] Among them, Infinity means infinity, E is a natural constant, and the material column shows the material brand.

[0273] Table 3a

[0274] Table 3b

[0275] The optical lens 1 of this embodiment includes 7 lenses and a total of 14 aspherical surfaces.

[0276] The aspheric surface of the optical lens 1 in Table 3a can be defined using, but not limited to, the following aspheric curve equation:

[0277] Wherein, z is the sag of the aspheric surface, r is the normalized radial coordinate of the aspheric surface, r is equal to the actual radial coordinate of the aspheric surface divided by the normalized radius R (here is 1), c is the vertex spherical curvature of the aspheric surface, K is the quadratic surface coefficient, and A2, A3, A4, A5, and A6 are the aspheric coefficients (see Table 3b).

[0278] The refractive index of the second optical element G2 is 1.5168 and the Abbe number is 61.467. It is understood that this embodiment shows the material grades of each element, and the corresponding refractive index and Abbe number can be determined, so this embodiment will not show them one by one.

[0279] Please refer to Table 3c, which shows the basic parameters of the camera module 30 shown in Figure 19 in a possible embodiment.

[0280] Table 3c

[0281] Table 3c shows the relevant design parameters of the camera module 30 for imaging at infinity and 80 cm.

[0282] Wherein, f0 is the focal length of the optical lens 1, F is the aperture value, Y1 is the half image height, MIC is the maximum imaging circle diameter, h2 is the height of the first surface 31 of the second optical element G2 in the first direction, and TTL is the total length of the optical system.

[0283] In this embodiment, the value of mic / h2 is 1.89, the value of s2 / s1 is 1.46, and the value of w / h1 is 1.76. At this time, the optical center point P of the second surface 32 is located at the midpoint of the first surface 31 in the first direction.

[0284] Please refer to Figures 20 to 22, Figure 20 is a simulated axial aberration diagram of the camera module 30 shown in Figure 19 in a possible embodiment, Figure 21 is a simulated lateral chromatic aberration diagram of the camera module 30 shown in Figure 19 in a possible embodiment, and Figure 22 is a simulated optical distortion diagram of the camera module 30 shown in Figure 19 in a possible embodiment.

[0285] Figure 20 shows axial chromatic aberration curves for camera module 30 at infinity and near object distances, showing simulation results for the depth of focus of light at different reference wavelengths: 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm. The abscissa in the figure represents the deviation along the optical axis (mm), and the ordinate represents the normalized coordinate at the pupil. The figure demonstrates that axial aberration is controlled within a very narrow range.

[0286] Figure 21 shows lateral chromatic aberration curves for camera module 30 imaging at infinity and near object distances, showing simulation results for the XY coordinate positions of light at different reference wavelengths: 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm. The abscissa plots the chromatic aberration value (μm) and the ordinate plots the field of view angle. The dashed line indicates the diffraction-limited range, demonstrating a very narrow range for lateral chromatic aberration.

[0287] Figure 22 shows the distortion curves of camera module 30 for imaging at infinity and near object distances. These curves represent the relative deviation of the beam convergence point (actual image height) from the ideal image height for different reference wavelengths: 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm. The horizontal axis represents percentage (%), and the vertical axis represents field of view angle (degrees). The figure shows that camera module 30 maintains very low distortion.

[0288] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the scope of protection of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0289] It should be noted that all the above drawings are for illustrative purposes only and do not represent the actual size of the product. Furthermore, the dimensional ratios between the components in the drawings are not intended to limit the actual product of the present application.

[0290] The above are only some of the embodiments and implementations of this application. The scope of protection of this 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 (1), characterized in that: The invention comprises a first optical element (G1) and a second optical element (G2), wherein the second optical element (G2) is located on the image side of the first optical element (G1); The first optical element (G1) includes at least one lens; The second optical element (G2) comprises a first surface (31), a second surface (32), and a third surface (33) connected to each other, the first surface (31) faces the first optical element (G1), a first angle α is formed between the first surface (31) and the second surface (32), a second angle β is formed between the third surface (33) and the second surface (32), the sum of the first angle α and the second angle β is not equal to 90°, and the second angle β is less than 45°; After passing through the first optical element (G1), the external light beam is incident on the second optical element (G2) from the first surface (31), is reflected on the second surface (32), and then is reflected on the third surface (33) before being emitted from the second optical element (G2) from the second surface (32).

2. The optical lens (1) according to claim 1, characterized in that The sum of the first angle α and the second angle β is less than 90°.

3. The optical lens (1) according to claim 1 or 2, characterized in that: The first angle α and the second angle β satisfy: |α-2×β|≤10° or |α-2×β|=0°.

4. The optical lens (1) according to any one of claims 1 to 3, characterized in that The refractive index of the second optical element (G2) is greater than (1 / sinα).

5. The optical lens (1) according to any one of claims 1 to 4, characterized in that: The first surface (31) has an optical center point, the first surface (31) and the second surface (32) have a first intersection point, the second surface (32) and the third surface (33) have a second intersection point, and a distance s1 from the first intersection point to the optical center point in the first direction and a distance s2 from the second intersection point to the optical center point in the first direction satisfy: s2>s1 or 1<(s2 / s1)<3; The first direction is perpendicular to the optical axis of the first optical element (G1) and parallel to the plane where the normal direction of the first surface (31) and the normal direction of the second surface (32) are located.

6. The optical lens (1) according to any one of claims 1 to 5, characterized in that: The relationship between the width w of the second optical element (G2) in the second direction and the height h1 of the second optical element (G2) in the first direction satisfies: 1<(w / h1)<1.75; The first direction is perpendicular to the optical axis of the first optical element (G1) and parallel to the surface where the normal direction of the first surface (31) and the normal direction of the second surface (32) are located, and the second direction is parallel to the optical axis of the first optical element (G1).

7. The optical lens (1) according to any one of claims 1 to 6, characterized in that: The optical lens (1) has a maximum imaging circle diameter mic, and the height h2 of the first surface (31) in the first direction and the maximum imaging circle diameter mic satisfy the following relationship: 1.5<(mic / h2)<3.5; The first direction is perpendicular to the optical axis of the first optical element (G1) and parallel to the plane where the normal direction of the first surface (31) and the normal direction of the second surface (32) are located.

8. The optical lens (1) according to any one of claims 1 to 7, characterized in that: One or more of the first surface (31), the second surface (32) and the third surface (33) is a curved surface with optical power.

9. The optical lens (1) according to any one of claims 1 to 8, characterized in that: The third surface (33) is fixedly connected with a reflective film.

10. The optical lens (1) according to any one of claims 1 to 9, characterized in that: The optical lens (1) further comprises a third optical element (G3), wherein the third optical element (G3) is located on the object side of the first optical element (G1). The third optical element (G3) is used to change the propagation direction of the optical axis from a first direction to a second direction, wherein the first direction is perpendicular to the optical axis of the first optical element (G1) and parallel to the surface where the normal direction of the first surface (31) and the normal direction of the second surface (32) are located, and the second direction is parallel to the optical axis of the first optical element (G1).

11. The optical lens (1) according to claim 10, characterized in that: The third optical element (G3) includes at least one prism or a mirror.

12. The optical lens (1) according to claim 11, characterized in that The second optical element (G2) is configured such that: during the anti-shake process of the optical lens (1), the third optical element (G3) rotates along an axis perpendicular to the plane where the first direction and the second direction are located, and / or the second optical element (G2) rotates along an axis parallel to the first direction.

13. The optical lens (1) according to claim 11 or 12, characterized in that: The second optical element (G2) is configured such that during the focusing process of the optical lens (1), at least one lens in the optical focusing element moves along the first direction.

14. A camera module (30), characterized in that: The optical lens (1) comprises a photosensitive element and any one of claims 1 to 12, wherein the photosensitive element is located on the image side of the optical lens (1).

15. The camera module (30) according to claim 14, characterized in that: The first surface (31) is perpendicular to the second direction, and the photosensitive element is perpendicular to the center line of the light beam emitted from the first optical element (G1).

16. The camera module (30) according to claim 14 or 15, characterized in that: The photosensitive element is configured to move in a direction parallel to the optical axis of the photosensitive element during the focusing process of the camera module (30); And / or, during the anti-shake process of the camera module (30), the photosensitive element rotates around an axis parallel to the optical axis of the photosensitive element, and / or the photosensitive element moves along a surface perpendicular to the optical axis of the photosensitive element.

17. An electronic device (100), characterized in that The invention comprises an image processor (60) and a camera module (30) according to any one of claims 14 to 16, wherein the image processor (60) is communicatively connected to the camera module (30), and the image processor (60) is used to obtain image data from the camera module (30) and process the image data.

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