Optical lens, camera module, and electronic device

Abstract

The present application relates to the technical field of photographing, and in particular to an optical lens, a camera module, and an electronic device. The optical lens comprises a first optical element and a second optical element; the first optical element comprises a front lens group, an optical path deflection element, and a rear lens group that are arranged from an object side to an image side; the optical path deflection element is configured to change an optical axis from a first direction to a second direction; the second optical element is located on an image side of the first optical element, and the second optical element comprises at least two lens group; the first optical element is used for image stabilization, and the second optical element is used for zooming; and an object side surface and an image side surface of the first optical element have similar shapes. In embodiments, the rear lens group relatively matches the front lens group; during image stabilization, the front lens group and the rear lens group can implement dynamic aberration compensation, so that the optical lens has a small aberration during image stabilization, and can achieve a better image stabilization effect; and by means of cooperation of the front lens group and the rear lens group, the optical lens has a strong image stabilization capability and a small size.

Description

Optical lenses, camera modules, and electronic devices

[0001] This application claims priority to Chinese Patent Application No. 202510048053.9, filed on January 10, 2025, entitled "Camera Module and Electronic Device", and to Chinese Patent Application No. 202510048053.9, filed on March 14, 2025, entitled "Optical Lens, Camera Module and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of photography technology, and more particularly to an optical lens, a camera module, and an electronic device. Background Technology

[0003] In recent years, with the development of technology, electronic devices have been moving towards ultra-thin and miniaturized designs. Consumers have increasingly higher demands for mobile phone photography performance, such as larger lens surfaces, longer focal lengths, and better image stabilization. These demands place higher requirements on mobile phone lenses.

[0004] In existing technologies, image stabilization for cameras can be achieved using sensor-based stabilization, but this increases the length or height of the optical system. For lens stabilization, prism-based stabilization can be used, but this approach is difficult to implement while simultaneously miniaturizing the camera. Summary of the Invention

[0005] The purpose of this application is to provide an optical lens, a camera module, and an electronic device.

[0006] In a first aspect, embodiments of this application provide an optical lens, including a first optical element and a second optical element; the first optical element includes a front lens group, an optical path reversing element, and a rear lens group arranged from the object side to the image side, the optical path reversing element being used to change the optical axis from a first direction to a second direction, the front lens group having positive optical power, and the rear lens group having negative optical power; the second optical element is located on the image side of the first optical element, and the second optical element includes at least two lens groups, which move along the second direction during the zooming process of the optical lens; during the image stabilization process of the optical lens, the first optical element rotates around the first direction and / or around the second direction. Rotation, and / or rotation about a third direction, which is different from both the first and second directions; wherein, the first optical element satisfies: ||sag1*(N1-1)|-|sag2*(N2-1)|| / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<1; wherein, sag1 is the sag of the object side of the front lens group at the first aperture, sag2 is the sag of the image side of the rear lens group at the second aperture, N1 is the refractive index of the lens containing the object side of the front lens group, and N2 is the refractive index of the lens containing the image side of the rear lens group; wherein, the first aperture is equal to the second aperture.

[0007] For example, the front lens group may include at least one lens.

[0008] For example, the rear lens group may include at least one lens.

[0009] For example, the first direction and the second direction can be perpendicular. The third direction can be perpendicular to the first direction and the second direction.

[0010] In this embodiment, the front lens group is located on the object side of the optical path reversal element, and the rear lens group is located on the image side of the optical path reversal element. The optical power of the front lens group is positive. The large optical power setting of the front lens group is beneficial to reducing the total optical length of the optical lens and to simplifying its image-side optical path structure. The optical power of the rear lens group is negative. When the optical power of the front lens group is large, the aberrations caused by the image stabilization movement of the front lens group are too large. The aberrations caused by the front lens group are reduced by the rear lens group. Therefore, through the cooperation of the front lens group and the rear lens group, the optical lens has strong image stabilization capability and small size.

[0011] Furthermore, due to the arrangement of the first optical element, the image-side optical element of the first optical element is more likely to have a larger setting space and movement space, which in turn helps to enable the optical lens to have a stronger zoom and / or focus capability, thereby improving the shooting capability of the optical lens.

[0012] By further setting the relationship between the surface shape of the object side of the front lens group, the refractive index N1 of the lens where the object side of the lens group is located, the surface shape of the image side of the rear lens group, and the refractive index N2 of the lens where the image side of the rear lens group is located, the rear lens group is made more matched with the front lens group. During anti-shake, the front lens group and the rear lens group can achieve dynamic aberration compensation, so that the aberration of the optical lens during anti-shake is small and has a better anti-shake effect.

[0013] In some embodiments, the second aperture is the aperture at any point on the image side of the rear lens group.

[0014] In this embodiment, the object side of the front lens group and the image side of the rear lens group are better matched, the compensation of the image side of the rear lens group for the object side of the front lens group is stronger, and the dynamic aberration compensation ability of the first optical element is strong.

[0015] In some embodiments, the first optical element satisfies: ||sag1*(N1 - 1)| - |sag2*(N2 - 1)|| / ((|sag1*(N1 - 1)| + |sag2*(N2 - 1)|) / 2) < 0.4.

[0016] In this embodiment, the difference between the object side of the front lens group and the image side of the rear lens group is small, the dynamic compensation ability of the first optical element is strong, further reducing the aberration of the first optical element during anti-shake and improving the anti-shake ability of the optical lens.

[0017] In some embodiments, the focal length fq of the front lens group and the focal length fc of the rear lens group satisfy: -2 < fq / fc < -0.5, or, -1.2 < fq / fc < -0.8.

[0018] In this embodiment, by reasonably distributing the focal lengths of the front lens group and the rear lens group, the optical lens has a smaller overall optical length, better anti-shake ability, and higher imaging quality.

[0019] In some embodiments, the focal length fq of the front lens group and the maximum focal length fmax of the optical lens satisfy: 0.2 < fq / fmax < 0.8, or, 0.4 < fq / fmax < 0.65.

[0020] Exemplarily, the maximum focal length fmax of the optical lens is the focal length when the optical lens is at the ultra-telephoto end.

[0021] In this embodiment, by reasonably setting the ratio of the focal length fq of the front lens group to the maximum focal length fmax of the optical lens, the focal length of the front lens group is relatively large in the optical lens, which is beneficial to shortening the overall optical length, thereby improving the compactness of the optical lens, and is also beneficial to enhancing the anti-shake ability of the first optical element, and further enhancing the anti-shake ability of the optical lens.

[0022] In some embodiments, the following relationship is satisfied between the focal length fc of the rear lens group and the maximum focal length fmax of the optical lens: -0.8 < fc / fmax < -0.2, or -0.7 < fc / fmax < -0.45.

[0023] In this embodiment, by reasonably setting the ratio of the focal length fc of the rear lens group to the maximum focal length fmax of the optical lens, the compensation ability of the rear lens group for the front lens group is relatively strong, which is beneficial to balancing the aberration during anti-shake, and thus is beneficial to improving the anti-shake ability of the first optical element and the imaging ability of the optical lens during anti-shake.

[0024] In some embodiments, the following relationship is satisfied between the total focal length fG1 of the first optical element and the maximum focal length fmax of the optical lens: fG1 / fmax < 10, or 1 < fG1 / fmax < 9.

[0025] In this embodiment, the first optical element has a small focal length and a large optical power. By making full use of the performance of the first optical element, while having a good anti-shake ability, it makes a great contribution to reducing the overall optical length and improving the compactness of the optical lens.

[0026] In some embodiments, the following relationship is satisfied among the focal length fq of the front lens group, the overall optical length TTL of the optical lens, and the zoom ratio Ra of the optical lens: 0.4 < fq / (TTL / Ra), or 0.8 < fq / (TTL / Ra).

[0027] In this embodiment, by setting the relationship among the focal length, the overall optical length, and the zoom ratio of the front lens group, it is beneficial for the optical lens to have a smaller overall optical length and a larger zoom ratio.

[0028] In some embodiments, the following relationship is satisfied among the maximum focal length fmax of the optical lens, the zoom ratio Ra of the optical lens, the image height IH of the optical lens, and the overall optical length TTL of the optical lens: 7.5 < fmax*Ra*IH / TTL < 50, or 15 < fmax*Ra*IH / TTL < 35.

[0029] In this embodiment, the larger the value of fmax*Ra*IH / TTL, the stronger the compactness and the shooting imaging ability of the optical lens. At this time, it is beneficial to set a larger focal length at the ultra-long end, and / or set a larger zoom ratio, and / or set a larger image height, and / or set a smaller overall optical length, so that the optical lens has a stronger adaptability to different sizes of electronic devices and a stronger shooting ability, and the comprehensive performance of the optical lens is stronger.

[0030] In some embodiments, the overall optical length TTL of the optical lens satisfies: 15 mm < TTL < 70 mm.

[0031] In some embodiments, the maximum movement stroke delta of the movable lens group with the largest displacement in the second optical element and the zoom ratio Ra of the optical lens satisfy: 3.9 < delta / Ra < 8, or 4 < delta / Ra < 7.

[0032] In this embodiment, it is beneficial to enable the movable lens group to have a relatively large movement distance, make the sensitivity of the movable lens group appropriate, and have a low sensitivity to manufacturing tolerances and assembly tolerances, which is conducive to the manufacture and assembly of the optical lens; the maximum movement stroke of the movable lens group is relatively long, which can greatly suppress the deterioration of aberration caused by the change of the focal length of the optical lens, so that while the optical lens has a strong zooming ability, its imaging quality is relatively high.

[0033] In some embodiments, the maximum movement stroke delta of the movable lens group with the largest displacement in the second optical element and the overall optical length TTL of the optical lens satisfy: 0.5 > delta / TTL > 0.15; or 0.35 > delta / TTL > 0.2.

[0034] In this embodiment, by setting the ratio of the maximum movement distance of the movable lens group to the overall optical length of the optical lens, the distance of the movable lens group with the largest displacement can be effectively controlled, and then the zoom ratio of the optical lens can be controlled. Therefore, it is beneficial to set a relatively large zoom ratio or a relatively small overall optical length.

[0035] In some embodiments, the maximum movement stroke delta of the movable lens group with the largest displacement in the second optical element and the image height IH of the optical lens satisfy: 4 > delta / IH > 0.4, or 1.5 > delta / IH > 0.5.

[0036] In this embodiment, it is beneficial to enable the movable lens group to have a relatively large movement distance, which is conducive to reducing the sensitivity of the movable lens group or increasing the zoom ratio, or is conducive to setting a larger photosensitive surface of the photosensitive element 2, thereby improving the image quality of the optical lens.

[0037] In some embodiments, the optical lens satisfies: 1.2 < Mcc / Mc < 1.8, or 1.3 < Mcc / Mc < 1.7; where Mcc is the total cascaded magnification of all movable lenses on the image side of the first movable lens group at the ultra-long focal length end, and Mc is the total cascaded magnification of all movable lenses on the image side of the first movable lens group at the long focal length end.

[0038] In this embodiment, the movable distance of the second movable lens group and subsequent movable lens groups of the optical lens can be set to be relatively large. By setting the ratio of Mcc to Mc, it can make a greater contribution when the optical lens zooms between the super telephoto end and the telephoto end, which is beneficial to make the optical lens have a larger zoom ratio.

[0039] In some embodiments, the second optical element includes a first lens group and a second lens group arranged from the object side to the image side, the first lens group having positive optical power and the second lens group having negative optical power.

[0040] In this embodiment, by reasonably setting the optical power of the first lens group and the second lens group, it is beneficial to enable the optical lens to have a large zoom ratio and continuous zoom capability, as well as good imaging capability.

[0041] In some embodiments, the focal length fG21 of the first lens group and the maximum focal length fmax of the optical lens satisfy: 0.2 <fG21 / fmax<0.35。

[0042] In this embodiment, by reasonably setting the focal length and optical power of the first lens group, it is beneficial to improve the zoom capability of the optical element.

[0043] In some embodiments, the focal length fG22 of the second lens group satisfies -0.35 with the maximum focal length fmax of the optical lens. <fG22 / fmax<-0.2。

[0044] In this embodiment, by reasonably setting the focal length of the second lens group, the absolute value of the focal length of the second lens group is made close to that of the first lens group. Through the cooperation of the first lens group and the second lens group, it is beneficial to reduce aberrations during imaging, thereby improving the image quality of the optical lens.

[0045] In some embodiments, the second optical element further includes a third lens group and a fourth lens group, the third lens group being located between the first optical element and the first lens group, and the fourth lens group being located on the image side of the second lens group.

[0046] In this embodiment, by setting a third lens group and a fourth lens group, the optical lens has more lenses or optical elements, which makes it easier to improve the imaging quality of the optical lens by coordinating the optical power, refractive index and other parameters of multiple optical elements, and also makes the design of the optical lens simpler.

[0047] In some embodiments, the optical lens has an ultra-telephoto end and a telephoto end, the focal length of the optical lens at the ultra-telephoto end is greater than the focal length of the optical lens at the telephoto end, and the image height of the optical lens at the ultra-telephoto end is the same as that of the optical lens at the telephoto end.

[0048] In this embodiment, the optical lens can achieve lossless optical zoom and has high image quality at different focal lengths.

[0049] Secondly, embodiments of this application provide a camera module, including a photosensitive element and an optical lens as provided in any embodiment of the first aspect, wherein the photosensitive element is located on the image side of the optical lens.

[0050] In this embodiment, the camera module has strong image stabilization capabilities and a small size.

[0051] Thirdly, embodiments of this application provide an electronic device, including an image processor and a camera module provided in the second aspect. The image processor is communicatively connected to the camera module and is used to acquire image data from the camera module and process the image data.

[0052] In this embodiment, the electronic device has strong image stabilization capabilities when shooting, which helps improve the user's shooting experience. Furthermore, due to the small size of the camera module, it is easy to miniaturize or thin the electronic device. Attached Figure Description

[0053] To illustrate the technical solutions in the embodiments or background art of this application, the accompanying drawings used in the embodiments or background art of this application will be described below.

[0054] Figure 1 is a schematic diagram of the structure of the electronic device provided in some embodiments of this application;

[0055] Figure 2 is a partial exploded structural diagram of the electronic device shown in Figure 1;

[0056] Figure 3 is a simplified structural diagram of the camera module shown in Figure 2;

[0057] Figure 4 is a simplified structural diagram of the camera module shown in Figure 3 in some embodiments;

[0058] Figure 5 is a schematic diagram of the camera module shown in Figure 1 at the telephoto end in Embodiment 1;

[0059] Figure 6 is a schematic diagram of the camera module shown in Figure 1 at the ultra-telephoto end in Embodiment 1;

[0060] Figure 7a is the image scattering curve of the camera module shown in Figure 5;

[0061] Figure 7b is a distortion diagram of the camera module shown in Figure 5;

[0062] Figure 8a is a scattering curve of the camera module shown in Figure 6;

[0063] Figure 8b is a distortion diagram of the camera module shown in Figure 6;

[0064] Figure 9 is a schematic diagram of the camera module shown in Figure 1 at the telephoto end in Embodiment 2;

[0065] Figure 10 is a schematic diagram of the camera module shown in Figure 1 at the ultra-telephoto end in some embodiments;

[0066] Figure 11a is the image scattering curve of the camera module shown in Figure 9;

[0067] Figure 11b is a distortion diagram of the camera module shown in Figure 9;

[0068] Figure 12a is a scattering curve of the camera module shown in Figure 10;

[0069] Figure 12b is a distortion diagram of the camera module shown in Figure 10;

[0070] Figure 13 is a schematic diagram of the camera module shown in Figure 1 at the telephoto end in Embodiment 3;

[0071] Figure 14 is a schematic diagram of the camera module shown in Figure 1 at the ultra-telephoto end in Embodiment 3;

[0072] Figure 15a is a scattering curve of the camera module shown in Figure 13;

[0073] Figure 15b is a distortion diagram of the camera module shown in Figure 13;

[0074] Figure 16a is a scattering curve of the camera module shown in Figure 14;

[0075] Figure 16b is a distortion diagram of the camera module shown in Figure 14;

[0076] Figure 17 is a schematic diagram of the camera module shown in Figure 1 at the telephoto end in Embodiment 4;

[0077] Figure 18 is a schematic diagram of the camera module shown in Figure 1 at the ultra-telephoto end in Embodiment 4;

[0078] Figure 19a is a scattering curve of the camera module shown in Figure 17;

[0079] Figure 19b is a distortion diagram of the camera module shown in Figure 17;

[0080] Figure 20a is a scattering curve of the camera module shown in Figure 18;

[0081] Figure 20b is a distortion diagram of the camera module shown in Figure 18;

[0082] Figure 21 is a schematic diagram of the camera module shown in Figure 1 at the telephoto end in Embodiment 5;

[0083] Figure 22 is a schematic diagram of the camera module shown in Figure 1 at the ultra-telephoto end in Embodiment 5;

[0084] Figure 23a is the image scattering curve of the camera module shown in Figure 21;

[0085] Figure 23b is a distortion diagram of the camera module shown in Figure 21;

[0086] Figure 24a is a scattering curve of the camera module shown in Figure 22;

[0087] Figure 24b is a distortion diagram of the camera module shown in Figure 22;

[0088] Figure 25 is a schematic diagram of the camera module shown in Figure 1 at the telephoto end in Embodiment Six;

[0089] Figure 26 is a schematic diagram of the camera module shown in Figure 1 at the ultra-telephoto end in Embodiment Six;

[0090] Figure 27a is a scattering curve of the camera module shown in Figure 25;

[0091] Figure 27b is a distortion diagram of the camera module shown in Figure 25;

[0092] Figure 28a is a scattering curve of the camera module shown in Figure 26;

[0093] Figure 28b is a distortion diagram of the camera module shown in Figure 26;

[0094] Figure 29 is a schematic diagram of the camera module shown in Figure 1 at the telephoto end in Embodiment 7;

[0095] Figure 30 is a schematic diagram of the camera module shown in Figure 1 at the ultra-telephoto end in Embodiment 7;

[0096] Figure 31a is a scattering curve of the camera module shown in Figure 29;

[0097] Figure 31b is a distortion diagram of the camera module shown in Figure 29;

[0098] Figure 32a is a scattering curve of the camera module shown in Figure 30;

[0099] Figure 32b is a distortion diagram of the camera module shown in Figure 30;

[0100] Figure 33 is a schematic diagram of the camera module shown in Figure 1 at the telephoto end in Embodiment 8;

[0101] Figure 34 is a schematic diagram of the camera module shown in Figure 1 at the ultra-telephoto end in Embodiment 8;

[0102] Figure 35a is the image scattering curve of the camera module shown in Figure 33;

[0103] Figure 35b is a distortion diagram of the camera module shown in Figure 33;

[0104] Figure 36a is the image scattering curve of the camera module shown in Figure 34;

[0105] Figure 36b is a distortion diagram of the camera module shown in Figure 34;

[0106] Figure 37 is a schematic diagram of the camera module shown in Figure 1 at the telephoto end in Embodiment 9;

[0107] Figure 38 is a schematic diagram of the camera module shown in Figure 1 at the ultra-telephoto end in Embodiment 9;

[0108] Figure 39a is the image scattering curve of the camera module shown in Figure 37;

[0109] Figure 39b is a distortion diagram of the camera module shown in Figure 37;

[0110] Figure 40a is a scattering curve of the camera module shown in Figure 38;

[0111] Figure 40b is a distortion diagram of the camera module shown in Figure 38. Detailed Implementation

[0112] To facilitate understanding of the optical lens and camera module provided in the embodiments of this application, the relevant terms used in this application are explained as follows:

[0113] The mirror sag is the vertical distance from a point on the mirror surface to the mirror reference plane (usually the vertical plane perpendicular to the center of the mirror along the axis). It is used to describe the curvature of the mirror surface.

[0114] 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 rays.

[0115] A lens or lens group with positive optical power, having a positive focal length, and having the effect of converging light.

[0116] A lens or lens group with negative optical power has a negative focal length and has the effect of diverging light.

[0117] 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 perpendicular distance from the optical center of a lens or lens group to the focal plane when a distant object is projected into a sharp image. From a practical perspective, it can be understood as the distance from the center of the lens to the focal plane when the object is at infinity. For prime lenses, the position of their optical center remains constant; for telephoto lenses, changes in the optical center result in changes in the focal length.

[0118] The object side is defined by the lens; the side where the object is located is called the object side, and the surface of the lens closest to the object side is called the object side surface.

[0119] The image side is the side on which the image of the object is located, with the lens as the boundary. The surface of the lens closest to the image side is called the image side surface.

[0120] An aperture diaphragm is a device used to control the amount of light passing through the lens and entering the sensor inside the camera body. It is usually located inside the lens, but can also be located in front of the lens.

[0121] Aperture value, also known as F-number (Fno), is a relative value derived from the lens's focal length divided by the lens's entrance pupil diameter (the reciprocal of the relative aperture). A smaller aperture value allows more light to enter the lens in the same unit of time. A smaller aperture value results in a shallower depth of field, blurring the background and creating an effect similar to a telephoto lens.

[0122] Total track length (TTL) refers to the total length from the surface of the lens closest to the object to the imaging plane. TTL is a major factor in determining the height of the camera and the space occupied by the camera.

[0123] The imaging plane is located on the image side of all lenses in a telephoto lens, and is the plane on which the image is formed after light passes through each lens in the telephoto lens in sequence.

[0124] The optical axis is a perpendicular axis passing through the center of a lens. The lens optical axis is the axis passing through the centers of all the lenses in the lens. When light rays parallel to the optical axis enter a convex lens, an ideal convex lens should have all the light rays converging at a single point behind the lens; this point where all the light rays converge is called the focal point.

[0125] The focal point is the point where parallel light rays converge after being refracted by a lens or lens group.

[0126] The image-side focal plane, also known as the back focal plane or the second focal plane, is a plane that passes through the image-side focal point (also known as the back focal point or the second focal point) and is perpendicular to the optical axis of the system.

[0127] The Abbe number, also known as the dispersion coefficient, is the ratio of the difference in refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material.

[0128] The field of view (FOV) in optical instruments is the angle between the two edges of the lens, representing the maximum range through which the image of the target object can pass through the lens. The size of the FOV determines the field of view of the optical instrument; a larger FOV results in a wider field of view but a lower optical magnification.

[0129] The sensor diagonal ImgH (Image Height) represents the diagonal length of the effective pixel area on the image sensor, which is also the image height of the imaging surface.

[0130] Aberrations are the properties of an ideal optical system in the paraxial region. Paraxial rays emitted from a point on an object intersect the image plane at a single point (i.e., the paraxial image point). However, in reality, rays passing through different apertures of a lens rarely intersect perfectly at a single point. Instead, they deviate from the position of the paraxial image point. These differences are collectively referred to as aberrations.

[0131] Axial spherical aberration, also known as longitudinal chromatic aberration, positional chromatic aberration, or axial aberration, occurs when a beam of light parallel to the optical axis converges at different positions after passing through a lens. This aberration is called positional chromatic aberration or axial chromatic aberration. This is because the lens images different wavelengths of light at different positions, causing the image-side focal planes of different colors of light to not coincide, resulting in the dispersion of polychromatic light.

[0132] Distortion, also known as image distortion, refers to the degree of distortion in the image formed by an optical system relative to the object itself. Distortion occurs due to the spherical aberration of the aperture. The height of the intersection point between the principal ray from different fields of view and the Gaussian image plane is not equal to the ideal image height; this difference is the distortion. Therefore, distortion only changes the imaging position of an off-axis object point on the ideal plane, causing a distortion in the image shape, but it does not affect the image's sharpness.

[0133] Astigmatism occurs because the object point is not on the optical axis of the optical system, and the emitted beam of light has an angle with the optical axis. After refraction by a lens, the convergence points of the meridional and sagittal beams are not at the same point. That is, the beam cannot be focused on a single point, resulting in an unclear image, hence astigmatism. The meridional and sagittal beams are the names of beams in two perpendicular planes within a rotationally symmetric optical system.

[0134] The meridional plane is the plane formed by the principal ray (principal beam) of an object point outside the optical axis and the optical axis.

[0135] The sagittal surface is the plane that passes through the principal ray (principal beam) of an object point outside the optical axis and is perpendicular to the meridional plane.

[0136] Field curvature refers to the difference in optical axis between the position of the sharpest image point after rays from the off-center field of view pass through an optical lens assembly and the position of the sharpest image point in the center field of view. When a lens has field curvature, the intersection of the entire 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.

[0137] The embodiments of this application are described below with reference to the accompanying drawings.

[0138] In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation," "connection," "joining," and "joining" should be interpreted broadly. For example, "joining" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an electrical connection or a mechanical connection. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Movable connection" refers to a connection where the relative positional relationship can change after connection. "Rotary connection" refers to a connection where the relative positional relationship can change. "Sliding connection" refers to a connection where the relative positional relationship can change. Furthermore, the integrated structure obtained by a one-piece molding process means that during the formation of one of the two components, that component is connected to the other component without requiring further processing (such as bonding, welding, snap-fit ​​connections, or screw connections) to connect the two components. Components A and B can be arranged relative to each other such that component A is projected along the target direction to obtain projection C, and component B is projected along the target direction to obtain projection D, with projection C and projection D at least largely overlapping. In some embodiments, the majority overlap can be any of the following: projection C is entirely within projection D; or projection D is entirely within projection C; or projection C and projection D intersect each other, and the intersection area of ​​projection C and projection D accounts for more than 50% of projection C or projection D.

[0139] The directional terms mentioned in the embodiments of this application, such as "top," "bottom," "inner," "outer," "upper," and "lower," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0140] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship. "Multiple" means at least two.

[0141] Furthermore, the limitations on relative positional relationships mentioned in the embodiments of this application, such as parallelism and perpendicularity, are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallelism or perpendicularity are acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0142] Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the structure of the electronic device 100 provided in some embodiments of this application, and Figure 2 is a partially exploded structural diagram of the electronic device 100 shown in Figure 1. In this embodiment, the electronic device 100 is described as a mobile phone. It is understood that Figures 1 and 2 only schematically show some components included in the electronic device 100. The actual shape, size, position, and structure of these components are not limited by Figures 1 and 2, and the electronic device 100 may include more or fewer components than those in Figures 1 and 2.

[0143] 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, etc. The screen 10 includes a light-transmitting cover 101 and a display screen 102. The light-transmitting cover 101 and the display screen 102 are stacked and fixedly connected. The light-transmitting cover 101 mainly serves to protect the display screen 102 and prevent dust. The material of the light-transmitting cover 101 includes, but is not limited to, glass. The display screen 102 can be a flexible display screen or a rigid display screen. For example, the display screen 102 can 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 (MLED) display screen, a micro organic light-emitting diode (MOLED) display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0144] For example, 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 light-transmitting cover plate 101, and is stacked with the light-transmitting cover plate 101 and the display screen 102. The frame 202 is fixed to the back cover 201. For example, the frame 202 can be fixedly connected to the back cover 201 by adhesive. The frame 202 can also be integrally formed with the back cover 201, that is, the frame 202 and the back cover 201 are a single structure. The frame 202 is located between the back cover 201 and the light-transmitting cover plate 101. The light-transmitting cover plate 101 can be fixed to the frame 202 by adhesive. The light-transmitting cover plate 101, the back cover 201, and the frame 202 form an internal receiving space for the electronic device 100. This internal receiving space houses the display screen 102.

[0145] For example, the camera module 30 is used to capture photos / videos. For example, the camera module 30 may be located within the internal storage space of the electronic device 100. The number of camera modules 30 can be one or more; for example, two are illustrated in this embodiment. The camera module 30 can be used as a rear camera module 30 or as a front camera module 30.

[0146] For example, the light-incident surface of the camera module 30 faces the back cover 201. The back cover 201 has 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 plate 101. In this way, the camera decorative cover 203 can increase the mounting space of the camera module 30 in the thickness direction of the electronic device 100. In other embodiments, the camera decorative cover 203 may also be flush with the back cover 201 or recessed into the internal receiving space of the electronic device 100.

[0147] For example, the camera cover 203 may have a light-transmitting window 2031. The light-transmitting window 2031 allows light from the scene to enter the light-receiving surface of the camera module 30. That is, light passes through the back cover and enters the camera module 30.

[0148] In this embodiment, the camera module 30 serves as the rear camera module 30 of the electronic device 100. Exemplarily, the two camera modules 30 can be camera module 301 and camera module 302, respectively. Camera module 301 can serve as the rear main camera module 30, and camera module 302 can serve as the rear telephoto camera module 30 with variable zoom. In other embodiments, the electronic device 100 may also include another camera module 30, serving as the rear wide-angle camera module 30.

[0149] In other embodiments, the light-incident surface of the camera module 30 faces the light-transmitting cover plate 101. The display screen 102 has a light-path-avoiding hole. This light-path-avoiding hole allows light from the scene to pass through the light-transmitting cover plate 101 and then enter the light-incident surface of the camera module 30. Thus, the camera module 30 serves as a front-facing camera module 30 for the electronic device 100.

[0150] In some embodiments, as shown in FIG2, the electronic device 100 further includes a circuit board 50 and an image processor 60. The circuit board 50 and the image processor 60 are located within the internal housing space of the electronic device 100. The image processor 60 is fixed to 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 acquire image data from the camera module 30 and process the image data. The communication connection between the camera module 30 and the image processor 60 can include data transmission via electrical connections such as wiring, or data transmission via coupling or other methods. It is understood that the camera module 30 and the image processor 60 can also achieve a communication connection through other methods capable of data transmission.

[0151] In some embodiments, the electronic device 100 may further include an analog-to-digital converter (also known as an A / D converter, not shown in the figure). 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, whereby the image processor 60 processes the digital image signal and finally displays the image or video on the screen 10.

[0152] In some embodiments, the electronic device 100 may further include a memory (not shown in the figure), which is communicatively connected to the image processor 60. The image processor 60 processes the digital image signal and then transmits 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 it is needed to view the image. 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.

[0153] In other embodiments, the electronic device 100 may also exclude the screen 10 and / or camera cover 203.

[0154] The electronic device 100 may have a width direction (X direction), a length direction (Y direction), and a thickness direction (Z direction), with the length direction perpendicular to the width direction and the thickness direction perpendicular to both the width and length directions. The display screen 102 and the housing 20 may be arranged relative to each other along the thickness direction of the electronic device 100. In this case, the housing 20 may be perpendicular to the thickness direction of the electronic device 100.

[0155] It is understood that the mounting position of the camera module 30 of the electronic device 100 shown in Figures 1 and 2 is merely illustrative, and this application does not strictly limit the mounting position of the camera module 30. In some other embodiments, the camera module 30 may also be mounted in other locations on the electronic device 100, for example, the camera module 30 may be mounted 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 rotate, move, or be detached relative to the terminal body, and the camera module 30 may also be mounted on the auxiliary component.

[0156] Please refer to Figures 2 and 3. Figure 3 is a simplified structural diagram of the camera module 30 shown in Figure 2.

[0157] In some embodiments, the camera module 30 may include an optical lens 1 and a photosensitive element 2, the photosensitive element 2 being located on the image side of the optical lens 1.

[0158] Among them, the photosensitive element 2 (also known as the image sensor) is a semiconductor chip with hundreds of thousands to millions of photodiodes on its surface, which generate charges when exposed to light.

[0159] The photosensitive element 2 utilizes the photoelectric conversion function of an optoelectronic device to convert the light image on its photosensitive surface into an electrical signal proportional to the light image. The photosensitive surface of the photosensitive element 2 faces the optical lens 1. The photosensitive element 2 can be a charge-coupled device (CCD), a complementary metal-oxide semiconductor (CMOS), a phototransistor, or a thin-film transistor, etc. A CCD is made of a highly sensitive semiconductor material that converts light into electrical charge. A CCD consists of many photosensitive units, typically in megapixel units. When the surface of the CCD is illuminated, each photosensitive unit reflects a charge onto the component. The signals generated by all the photosensitive units are added together to form a complete image. A CMOS mainly utilizes semiconductors made of silicon and germanium, allowing N-type (negative) and P-type (positive) semiconductors to coexist on the CMOS. The current generated by these complementary effects can be recorded and interpreted by the processing chip as an image.

[0160] The optical lens 1 primarily utilizes the refraction principle of lenses for imaging. Light from the scene passes through the optical lens 1, forming a clear image on the focal plane, which is then recorded by the photosensitive element 2 located on the focal plane. For example, the optical lens 1 can be a telephoto lens, capable of better capturing objects at greater distances.

[0161] This embodiment is described using a periscope lens as an example. When the optical lens 1 is a periscope lens, it is better suited for use in thin electronic devices.

[0162] 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.

[0163] The filter 3 is used to filter out unwanted wavelengths of light, preventing false colors or ripples from the photosensitive element 2, thereby improving its effective resolution and color reproduction. For example, the filter 3 can be an infrared filter 3. In this embodiment, the filter 3 is a separate component. In other embodiments, the filter 3 may be omitted, and filtering may be achieved by surface treatment or material treatment of at least one optical element of the telephoto lens. This application does not strictly limit the specific embodiments of the structure or component used to achieve filtering.

[0164] In some embodiments, the camera module 30 may further include a housing 40. The photosensitive element 2 and the optical lens 1 may be installed inside the housing 40. The housing 40 may have a light-transmitting opening 401 for transmitting light so that external scene light can enter the optical lens 1.

[0165] In this embodiment, external light can pass through the optical lens 1 and illuminate the photosensitive surface of the photosensitive element 2. Exemplarily, the working principle of the camera module 30 is as follows: the light reflected from the subject passes through the optical lens 1 and the filter 3 to generate an optical image, which is then 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 the analog-to-digital converter (ADC), which then converts it into a digital image signal for the image processor 60 (see Figure 2).

[0166] Please refer to Figures 1 to 4. Figure 4 is a simplified structural diagram of the camera module 30 shown in Figure 3 in some embodiments. Figures 1 to 4 are only schematic diagrams of each lens or lens group and are not intended to limit the number of lenses in the lens group, nor are they intended to limit the optical power, surface shape, etc. of each lens.

[0167] In some embodiments, the optical lens 1 includes a first optical element G1 and a second optical element G2. The second optical element G2 is located on the image side of the first optical element G1.

[0168] The first optical element G1 includes a front lens group G11, an optical path deflection element G12, and a rear lens group G13 arranged along the object side to the image side.

[0169] For example, the front lens group G11 may include at least one lens. The optical power of the front lens group G11 may be positive.

[0170] The front lens group G11 may consist of only one lens, that is, the front lens group G11 consists of only the first lens. In this case, the setup of the front lens group G11 is relatively simple and easy to connect with the optical path folding element G12. In addition, the front lens group G11 has a low thickness, which helps to reduce the shoulder height of the optical lens 1.

[0171] Alternatively, the front lens group G11 may also include multiple lenses. For example, the number of lenses in the front lens group G11 can be 2, 3, 4, etc. When the front lens group G11 has multiple lenses, aberrations can be eliminated or reduced by combining different materials of the multiple lenses; aberrations can also be eliminated or reduced by combining lenses with positive optical power and lenses with negative optical power. This embodiment does not strictly limit the number of lenses in the front lens group G11. For example, the optical axis direction of the front lens group G11 can be parallel to the Z direction.

[0172] The front lens group G11 may have an object-side surface and an image-side surface. The object-side surface of the first lens may be the object-side surface of the front lens group G11 and the object-side surface of the first optical element G1.

[0173] For example, the optical path deflection element G12 is used to change the propagation direction of the light beam. The optical path deflection element G12 is used to change the propagation direction of the light beam from a first direction to a second direction. At this time, the first optical element G1 is used to change the optical axis from the first direction to the second direction.

[0174] The first direction can be the direction in which the light beam enters the optical path reversing element G12, and this direction can be parallel to the thickness direction of the electronic device. The second direction can be the direction in which the light beam exits the optical path reversing element G12, and this direction can be parallel to the length direction of the electronic device. It can be understood that the optical path reversing element G12 is located on the image side of the front lens group G11, and the first direction can be the direction in which the light beam exits from the front lens group G11, and this direction can be parallel to the optical axis of the front lens group G11. The optical path reversing element G12 is located on the object side of the rear lens group G13, and the light beam can enter the rear lens group G13 from the second direction; when the optical axis of the rear lens group G13 is not bent, the second direction can be parallel to the optical axis of the second optical element G2.

[0175] For example, the optical path deflection element G12 can be a prism, a mirror, etc.

[0176] For example, the rear lens group G13 may include at least one lens. The optical power of the rear lens group G13 may be negative.

[0177] The rear lens group G13 may consist of only one lens, that is, the rear lens group G13 may only include the first lens. In this case, the configuration of the rear lens group G13 is relatively simple and easy to connect with the optical path deflection element G12.

[0178] Alternatively, the rear lens group G13 may also include multiple lenses. For example, the number of lenses in the rear lens group G13 can be 2, 3, 4, etc. When the rear lens group G13 has multiple lenses, aberrations can be eliminated or reduced by combining different materials of the multiple lenses; aberrations can also be eliminated or reduced by combining lenses with positive optical power and lenses with negative optical power. This embodiment does not strictly limit the number of lenses in the rear lens group G13. For example, the optical axis direction of the rear lens group G13 can be parallel to the Y direction.

[0179] The rear lens group G13 can have an object-side surface and an image-side surface. The image-side surface of the second lens can be the image-side surface of the rear lens group G13 and the image-side surface of the first optical element G1.

[0180] The front lens group G11 and the rear lens group G13 are fixedly connected to the optical path refracting element G12. The front lens group G11 and the rear lens group G13 can move synchronously with the optical path refracting element G12. The front lens group G11, the optical path refracting element G12, and the rear lens group G13 constitute a dynamic aberration compensation image stabilization assembly. When the optical lens 1 or the subject moves, the front lens group G11, the optical path refracting element G12, and the rear lens group G13 can move, thereby stabilizing the image of the subject and improving the shooting effect of the optical lens 1. It is easy to understand that the dynamic aberration compensation capability of the front lens group G11 and the rear lens group G13 determines the aberration compensation capability of the first optical element G1 during image stabilization movement.

[0181] For example, during image stabilization, the first optical element G1 of the optical lens 1 rotates about a first direction, and / or about a second direction, and / or about a third direction. The third direction is different from both the first and second directions. For example, the third direction can be perpendicular to the first and second directions, or it can be parallel to the width direction of the electronic device. For instance, the third direction can be parallel to the X-direction. In this way, the first optical element G1 can rotate in multiple directions to compensate for the shake of the optical lens 1, resulting in good compensation and strong image stabilization capability of the optical lens 1.

[0182] The second optical element G2 may include a first lens group G21 and a second lens group G22 extending from the object side to the image side.

[0183] For example, the first lens group G21 may include at least one lens. The first lens group G21 may be movable along the optical axis. The optical axis of the first lens group G21 may be parallel to the second direction.

[0184] The first lens group G21 may consist of only one lens, and the number of lenses in the first lens group G21 may be 2, 3, 4, etc. When the first lens group G21 has multiple lenses, aberrations can be eliminated or reduced by combining different materials of the multiple lenses; aberrations can also be eliminated or reduced by combining lenses with positive optical power and lenses with negative optical power. In this embodiment, the number of lenses in the rear lens group G13 is not strictly limited.

[0185] Understandably, the position of the first lens group G21 can be moved to a set position and kept relatively fixed. The first lens group G21 can be driven by a drive mechanism such as a voice coil motor, thereby achieving movement.

[0186] For example, the second lens group G22 may include at least one lens. The second lens group G22 may be movable along the optical axis. The optical axis of the second lens group G22 may be parallel to a second direction.

[0187] The second lens group G22 may consist of only one lens. Alternatively, the second lens group G22 may have two, three, four, or other lenses. When the second lens group G22 has multiple lenses, aberrations can be eliminated or reduced by combining lenses made of different materials; aberrations can also be eliminated or reduced by combining lenses with positive optical power and lenses with negative optical power. This embodiment does not strictly limit the number of lenses in the rear lens group G13.

[0188] Understandably, the position of the second lens group G22 can be moved to a set position and kept relatively fixed. The second lens group G22 can be driven by a drive mechanism such as a voice coil motor, thereby achieving movement.

[0189] For example, the optical axes of the first lens group G21 and the second lens group G22 can coincide.

[0190] In this embodiment, the optical lens 1 may have a telephoto end and an ultra-telephoto end. The optical lens 1 can zoom between the telephoto end and the ultra-telephoto end. The first lens group G21 and the second lens group G22 can be driven independently to achieve zooming or focusing of the optical lens 1. When the optical lens 1 zooms, the first lens group G21 and the second lens group G22 move in the same direction. Furthermore, when the optical lens 1 zooms, the first optical element G1 can remain stationary.

[0191] It is understandable that the telephoto end and the super telephoto end of the optical system are relative states and do not represent the specific value of the effective focal length of the optical lens 1. The effective focal length of the optical lens 1 at the super telephoto end is greater than the effective focal length of the optical lens 1 at the telephoto end.

[0192] It is understandable that the optical lens 1 can have a greater number of movable lens groups. That is, the optical lens 1 can have two or more movable lens groups, and multiple movable lens groups can be used to achieve zoom or focus.

[0193] In this embodiment, the front lens group G11 is located on the object side of the optical path reversing element G12, and the rear lens group G13 is located on the image side of the optical path reversing element G12. The optical power of the front lens group G11 is positive. The large optical power of the front lens group G11 is beneficial to reducing the total optical length of the optical lens 1 and to simplifying the optical path structure on its image side. The optical power of the rear lens group G13 is negative. When the optical power of the front lens group G11 is large, the aberration caused by the image stabilization movement of the front lens group G11 is too large. The aberration caused by the front lens group G11 is reduced by the rear lens group G13. Therefore, through the cooperation of the front lens group G11 and the rear lens group G13, the optical lens 1 has strong image stabilization capability and small size.

[0194] Furthermore, due to the arrangement of the first optical element G1, the optical elements on the image side of the first optical element G1 (such as the first lens group G21 and the second lens group G22) are more likely to have a larger setting space and movement space, which in turn helps the optical lens 1 to have a stronger zoom and / or focus capability, thereby improving the shooting capability of the optical lens 1.

[0195] In this embodiment, the total optical length (TTL) is the distance from the surface closest to the object side to the imaging surface after the optical path is unfolded. That is, TTL = W1 + W2. Wherein, W1 is the distance from the object side of the front lens group G11 to the optical axis of the rear lens group G13, and W2 is the distance from the optical axis of the front lens group G11 to the imaging surface.

[0196] In some embodiments, the parameters of the optical lens 1 can be related by Formula 1: (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2).

[0197] Wherein, sag1 is the sag of the object-side surface of the front lens group G11 at the first aperture, sag2 is the sag of the image-side surface of the rear lens group G13 at the second aperture, N1 is the refractive index of the lens containing the object-side surface of the front lens group G11, and N2 is the refractive index of the lens containing the image-side surface of the rear lens group G13. The first aperture can be the aperture at a point on the object-side surface of the front lens group G11.

[0198] For example, at the object-side aperture r1 of the front lens group G11, the corresponding sagitta is h1, and at the image-side aperture r2 of the rear lens group G13, the corresponding sagitta is h2, where r1 = r2. In this case, the value of sag1 is h1, and the value of sag2 is h2.

[0199] It is understandable that every point on the surface of a lens has a sag. Points with the same aperture on the lens have the same sag, while points with different apertures have different sags. The set of sags of all points on the lens can represent the surface shape of that surface. In particular, the object-side surface of the front lens group G11 is also the object-side surface of the first optical element G1, and the image-side surface of the rear lens group G13 is also the image-side surface of the first optical element G1.

[0200] It is understandable that when the current lens group G11 has multiple lenses, the refractive indices of these lenses can be the same or different. Similarly, when the rear lens group G13 has multiple lenses, the refractive indices of these lenses can be the same or different.

[0201] Formula 1 represents the difference in sagittal height between the object side of the front lens group G11 and the image side of the rear lens group G13 at the same aperture. The refractive indices of the front lens group G11 and the rear lens group G13 are introduced for correction. The smaller the difference in sagittal height, the smaller the aberration of the first optical element G1 during image stabilization, and the stronger the image stabilization performance.

[0202] Optical lens 1 satisfies: (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<1;

[0203] That is, the value of Formula 1 is less than 1.

[0204] For example, (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<0.3. Or, (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<0.4. In this case, the difference between the object-side surface of the front lens group G11 and the image-side surface of the rear lens group G13 is small, the dynamic compensation capability of the first optical element G1 is strong, further reducing the aberration when the first optical element G1 is used for image stabilization, and improving the image stabilization capability of the optical lens 1.

[0205] For example, the value of (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2) can take values ​​of 0.02, 0.03, 0.05, 0.1, 0.138, 0.15, 0.18, 0.23, 0.26, 0.3, etc.

[0206] For example, the first aperture can be the aperture of the upper part of the object side of the front lens group G11, and the second aperture corresponds to the aperture of the upper part of the image side of the rear lens group G13.

[0207] In other examples, the first aperture can be the aperture of any point on the object side of the front lens group G11, or the second aperture corresponds to the aperture of any point on the image side of the rear lens group G13. In this case, all values ​​calculated by the front lens group G11 and the rear lens group G13 according to Formula 1 are less than 1; in other words, the maximum value calculated by Formula 1 is less than 1. At this time, the object side of the front lens group G11 and the image side of the rear lens group G13 are better matched, the image side of the rear lens group G13 provides stronger compensation for the object side of the front lens group G11, and the dynamic aberration compensation capability of the first optical element G1 is strong.

[0208] In this embodiment, by setting the relationship between the object-side surface shape of the front lens group G11, the refractive index N1 of the lens containing the object-side surface of the lens group G11, the image-side surface shape of the rear lens group G13, and the refractive index N2 of the lens containing the image-side surface of the rear lens group G13, the rear lens group G13 is better matched to the front lens group G11. During image stabilization, the front lens group G11 and the rear lens group G13 can achieve dynamic aberration compensation, thereby making the aberration of the optical lens 1 smaller during image stabilization and having a better image stabilization effect.

[0209] In some embodiments, the optical lens 1 may also include a greater number of optical elements.

[0210] The second optical element G2 may further include a third lens group G23 and a fourth lens group G24. The third lens group G23 is located between the first optical element G1 and the first lens group G21, and the fourth lens group G24 is located on the image side of the second lens group G22.

[0211] For example, the third lens group G23 and the fourth lens group G24 may each be fixed optical elements. In some other examples, the third lens group G23 and / or the fourth lens group G24 may be movable lens groups.

[0212] For example, the third lens group G23 may include at least one lens, and this embodiment is not specifically limited.

[0213] For example, the fourth lens group G24 may include at least one lens, and this embodiment is not specifically limited.

[0214] In this embodiment, by setting the third lens group G23 and the fourth lens group G24, the optical lens 1 has more lenses or optical elements, which makes it easier to improve the imaging quality of the optical lens 1 by coordinating the optical power, refractive index and other parameters of multiple optical elements, and also makes the design of the optical lens 1 simpler.

[0215] In some other embodiments, the second optical element G2 may not include the third lens group G23 and the fourth lens group G24, or may only include one of the third lens group G23 and the fourth lens group G24. This embodiment does not specifically limit this.

[0216] In some embodiments, in the camera module 30, the photosensitive element 2 can be perpendicular to the optical axis of the second lens group G22, that is, the photosensitive element 2 is perpendicular to the second direction. In this case, the photosensitive element 2 is essentially vertically positioned, and there is no need to set up a component to refract the optical path between the second lens group G22 and the photosensitive element 2. This allows the first lens group G21 and the second lens group G22 to have more space for setting and movement, thereby simplifying the structural setup of the camera module 30.

[0217] In some other embodiments, the photosensitive element 2 may form an acute angle with the optical axis of the first lens group G21, or the photosensitive element 2 may be parallel to the optical axis of the first lens group G21. It is understood that the direction of the optical axis can be changed by elements such as prisms that deflect the optical path. This embodiment does not specifically limit the configuration of the photosensitive element 2.

[0218] In some embodiments, the object-side surface of the front lens group G11 has positive optical power, and the image-side surface of the rear lens group G13 has negative optical power. In this embodiment, the front lens group G11 is located at the front end of the optical lens 1, which contributes significantly to the convergence of light and helps to reduce the overall optical length of the optical lens 1. The rear lens group G13 is used to compensate for the front lens group G11 so that the first optical element G1 has small aberrations during image stabilization.

[0219] In some embodiments, the focal length fq of the front lens group G11 and the focal length fc of the rear lens group G13 satisfy the following relationship: -2 <fq / fc<-0.5。

[0220] For example, -1.2 <fq / fc<-0.8。

[0221] For example, the value of fq / fc can be -0.6, -0.8, -0.89, -0.96, -0.97, -0.98, -1.07, -1, -1.1, -1.3, -1.5, -1.7, -1.9, etc.

[0222] In this embodiment, by reasonably allocating the focal length of the front lens group G11 and the focal length of the rear lens group G13, the optical lens 1 has a relatively short overall optical length, good anti-shake ability, and high imaging quality.

[0223] In some embodiments, the relationship between the focal length fq of the front lens group G11 and the maximum focal length fmax of the optical lens 1 satisfies: 0.2 < fq / fmax < 0.8, or 0.4 < fq / fmax < 0.65.

[0224] Exemplarily, the maximum focal length fmax of the optical lens 1 is the focal length when the optical lens 1 is at the ultra-telephoto end.

[0225] Exemplarily, the value of fq / fmax can be 0.5, 0.55, 0.54, 0.62, 0.58, 0.60, 0.65, etc.

[0226] In this embodiment, by reasonably setting the ratio of the focal length fq of the front lens group G11 to the maximum focal length fmax of the optical lens 1, the focal length of the front lens group G11 is relatively large in the optical lens 1, which is beneficial to shortening the overall optical length, thereby improving the compactness of the optical lens 1, and is also beneficial to enhancing the anti-shake ability of the first optical element G1, and thus enhancing the anti-shake ability of the optical lens 1.

[0227] In some embodiments, the relationship between the focal length fc of the rear lens group G13 and the maximum focal length fmax of the optical lens 1 satisfies: -0.8 < fc / fmax < -0.2, or -0.7 < fc / fmax < -0.45.

[0228] Exemplarily, the value of fc / fmax can be -0.55, -0.58, -0.56, -0.58, -0.60, -0.61, -0.66, etc.

[0229] It can be understood that the value of the focal length of the rear lens group G13 is negative, and the optical power of the rear lens group G13 is negative.

[0230] In this embodiment, by reasonably setting the ratio of the focal length fc of the rear lens group G13 to the maximum focal length fmax of the optical lens 1, the compensation ability of the rear lens group G13 for the front lens group G11 is relatively strong, which is beneficial to balancing the aberration during anti-shake, and thus is beneficial to enhancing the anti-shake ability of the first optical element G1 and the imaging ability of the optical lens 1 during anti-shake.

[0231] In some embodiments, the relationship between the total focal length fG1 of the first optical element G1 and the maximum focal length fmax of the optical lens 1 satisfies: fG1 / fmax < 10. fG1 is the total focal length of the first optical element G1 of the optical lens 1.

[0232] Exemplarily, 1 < fG1 / fmax < 9, or, 1 < fG1 / fmax < 3. For example, the value of fG1 / fmax can be 1, 1.75, 1.93, 1.92, 2.08, 2.34, 2.43, 2.8, 3, 3.5, 4, 4.5, 5, 6, 7, 8.73, 9, etc.

[0233] In this embodiment, the first optical element G1 has a small focal length and a large optical power. By making full use of the performance of the first optical element G1, while having good anti-shake ability, it makes a great contribution to reducing the overall optical length and improves the compactness of the optical lens 1.

[0234] In some embodiments, the following relationship is satisfied among the focal length fq of the rear lens group G13, the overall optical length TTL of the optical lens 1, and the zoom ratio Ra of the optical lens 1: 0.4 < fq / (TTL / Ra).

[0235] Among them, 15 < TTL / Ra < 30. Exemplarily, 20 < TTL / Ra < 25. For example, the value of TTL / Ra can be 15, 17, 19, 20, 20.44, 21.75, 21.8​​​​​​​​​​​​​​In this embodiment, the larger the value of C, the stronger the compactness and imaging ability of the optical lens 1. At this time, it is beneficial to set a larger focal length for the ultra-long end, and / or set a larger zoom ratio, and / or set a larger image height, and / or set a smaller overall optical length, so that the optical lens 1 has stronger adaptability to electronic devices of different sizes and stronger shooting ability, and the comprehensive performance of the optical lens 1 is stronger.

[0241] In some embodiments, the maximum movement stroke delta of the movable lens group with the largest displacement in the second optical element G2 of the optical lens 1 and the zoom ratio Ra of the optical lens 1 satisfy: 3.9 < delta / Ra < 8.

[0242] Where, when the second optical element G2 has multiple movable lens groups, delta is the maximum movement stroke of the movable lens group with the largest displacement among the multiple movable lens groups. Exemplarily, the first lens group G21 and the second lens group G22 are both movable optical elements, and the displacement of the second lens group G22 is greater than that of the first lens group G21, then delta is the maximum movement stroke of the second lens group G22.

[0243] Exemplarily, 4 < delta / Ra < 7. For example, delta / Ra can take values such as 4.095, 5.8, 5.83, 5.76, 5.9, 6, 6.15, 6.3, 6.56, 6.7, 7, etc.

[0244] At this time, it is beneficial to enable the second lens group G22 to have a larger movement distance, make the sensitivity of the second lens group G22 appropriate, and have low sensitivity to manufacturing tolerances and assembly tolerances, which is beneficial to the manufacturing and assembly of the optical lens 1; the maximum movement stroke of the second lens group G22 is relatively long, which can largely suppress the deterioration of aberration caused by the change of the focal length of the optical lens 1, so that the optical lens 1 has high imaging quality while having strong zoom ability. <�

[0245] In some embodiments, the maximum movement stroke delta of the movable lens group with the largest displacement in the optical lens 1 and the overall optical length TTL of the optical lens 1 satisfy: 0.5 > delta / TTL > 0.15.

[0246] Exemplarily, 0.35 > delta / TTL > 0.2. For example, the value of delta / TTL can be taken as 0.15, 0.2, 0.24, 0.25, 0.26, 0.28, 0.3, <0.4>, 0.5, etc.

[0247] In this embodiment, by setting the ratio of the maximum moving distance of the movable lens group to the overall optical length of the optical lens, the moving distance of the movable lens group with the largest displacement can be effectively controlled, and thus the zoom ratio of the optical lens 1 can be controlled. Therefore, it is beneficial to set a larger zoom ratio or a smaller overall optical length.

[0248] In some embodiments, for the optical lens 1, the maximum moving stroke delta of the movable lens group with the largest displacement and the image height IH of the optical lens 1 satisfy: 4 > delta / IH > 0.4.

[0249] Exemplarily, 1.5 > delta / IH > 0.5. For example, the value of delta / IH can be 0.4, 0.5, 0.57, 0.763, 0.768, 0.769, 0.8, 0.984, 1.2, 1.3, 1.4, 1.5, 2, 3, 4, etc.

[0250] In this embodiment, it is beneficial to enable the movable lens group to have a larger moving distance, which is conducive to reducing the sensitivity of the movable lens group or increasing the zoom ratio, or is beneficial to setting a larger photosensitive surface of the photosensitive element 2, thereby improving the image quality of the optical lens 1.

[0251] In some embodiments, the optical lens 1 satisfies: 1.2 < Mcc / Mc < 2. Where Mcc is the total cascaded magnification of all movable lenses on the image side of the first movable lens group at the ultra-telephoto end, and Mc is the total cascaded magnification of all movable lenses on the image side of the first movable lens group at the telephoto end.

[0252] Here, the cascaded magnification is the magnification of the current lens (or lens group) with respect to the front lens (or lens group). The cascaded magnification depends on the magnification of the lens (or lens group) itself and the position of the lens (or lens group) in the optical lens 1.

[0253] Exemplarily, when the movable lens group of the optical lens 1 is the first lens group G21 and the second lens group G22, and the first lens group G21 is the first movable lens group, then Mcc is the total cascaded magnification of the second lens group G22 at the ultra-telephoto end, and Mc is the total cascaded magnification of the second lens group G22 at the telephoto end. It can be understood that when the optical lens 1 includes more movable lens groups, then Mcc is the total cascaded magnification of the second lens group G22 and more lens groups at the ultra-telephoto end, and Mc is the total cascaded magnification of the second lens group G22 and more lens groups at the telephoto end.

[0254] For example, the value of Mcc / Mc can be 1.2, 1.3, 1.38, 1.53, 1.56, 1.58, 1.64, 1.68, 1.7, 1.75, 1.8, 1.9, 2, etc.

[0255] Exemplarily, 1.2 < Mcc / Mc < 1.8, or, 1.3 < Mcc / Mc < 1.7.

[0256] In this embodiment, the movable distances of the second movable lens group and the subsequent movable lens groups of the optical lens 1 are easily set to be relatively large. By setting the ratio of Mcc and Mc, it has a greater contribution when the optical lens 1 zooms between the ultra-telephoto end and the telephoto end, which is beneficial to enable the optical lens 1 to have a larger zoom ratio.

[0257] In some embodiments, the rotation angle of the first optical element G1 can achieve an anti-shake effect of up to 0.5° - 5°. That is, the common rotation of the front lens group G11 and the rear lens group G13 with the optical path folding element G12 can achieve an anti-shake effect of up to 0.5° - 5°.

[0258] Exemplarily, the first optical element G1 can achieve an anti-shake effect of up to 一度.

[0259] At this time, the first optical element G1 has a relatively large movement angle, which can compensate for a large amplitude of shaking of the optical lens 1, making the optical lens 1 have stronger anti-shake ability.

[0260] In some embodiments, when the first optical element G1 performs dynamic aberration balance anti-shake, it can rotate around the X direction (i.e., nodding motion), and the anti-shake in the shaking direction rotates around the y-axis or z-axis direction (i.e., shaking motion). Among them, the position of the point around which the first optical element G1 rotates can be specifically set according to the design of the motor scheme, and this embodiment does not make specific limitations on this.

[0261] In some embodiments, the first lens group G21 has a positive optical power, and the second lens group G22 has a negative optical power. At this time, by reasonably setting the optical powers of the first lens group G21 and the second lens group G22, it is beneficial to enable the optical lens 1 to have a larger zoom ratio and continuous zoom ability, and have better imaging ability.

[0262] In some embodiments, the focal length fG21 of the first lens group G21 and the maximum focal length fmax of the optical lens 1 satisfy: 0.2 < fG21 / fmax < 0.35.

[0263] For example, the value of fG21 / fmax can be taken as 0.2, 0.24, 0.26, 0.29, 0.30, 0.32, 0.35, etc.

[0264] In this embodiment, by reasonably setting the focal length and optical power of the first lens group G21, it is beneficial to improve the zoom ability of the optical element.

[0265] In some embodiments, the focal length fG22 of the second lens group G22 and the maximum focal length fmax of the optical lens 1 satisfy: -0.35 < fG22 / fmax < -0.2.

[0266] For example, the value of fG22 / fmax can be -0.2, -0.26, -0.29, -0.30, -0.31, -0.32, -0.34, -0.35, etc.

[0267] In this embodiment, by reasonably setting the focal length of the second lens group G22, the absolute value of the focal length of the second lens group G22 is close to the focal length of the first lens group G21, and through the cooperation of the first lens group G21 and the second lens group G22, it is beneficial to reduce the aberration during imaging, and thus improve the image quality of the optical lens 1.

[0268] In some embodiments, the image heights at the telephoto end and the ultra-telephoto end of the optical lens 1 are the same. At this time, the optical lens 1 can achieve lossless optical zoom and has high image quality at different focal lengths.

[0269] Exemplarily, during the zooming process of the optical lens 1 from the telephoto end to the ultra-telephoto end, the position of the first optical element G1 is fixed, and both the first lens group G21 and the second lens group G22 move in the second direction towards the direction close to the first optical element G1. That is, the distance between the first lens group G21 and the first optical element G1 decreases, the distance between the second lens group G22 and the first optical element G1 decreases, the effective focal length of the optical lens 1 increases, and the magnification of the optical lens 1 increases. Among them, when the optical lens 1 zooms between the telephoto end and the ultra-telephoto end and at other focal lengths between the telephoto end and the ultra-telephoto end, the position of the imaging plane of the optical lens 1 relative to the first optical element G1 remains unchanged, the image height remains unchanged, and the photosensitive element 2 of the camera module 30 can always be fully utilized to achieve continuous lossless zoom.

[0270] It can be understood that the imaging plane of the optical lens 1 can be located on the surface of the photosensitive element 2.

[0271] In some embodiments, the optical system satisfies: 15mm < TTL < 70mm. Exemplarily, the value of TTL can be 15mm, 20mm, 25mm, 29.2mm, 38.5mm, 38.26mm, 39mm, 40mm, 43.5mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm.

[0272] Some embodiments, the optical path folding element G12 is a right-angle prism or a mirror. Among them, the prism has better stability and the mirror has lighter weight, which can be specifically set according to requirements.

[0273] It is understandable that the above-mentioned parameters of optical lens 1 satisfying the constraints of Formula 1, the constraints on the ratio of the focal length fq of the front lens group G11 to the focal length fc of the rear lens group G13 of optical lens 1, the constraints on the focal length fq of the front lens group G11 to the maximum focal length fmax of optical lens 1, the constraints on the ratio of the focal length fc of the rear lens group G13 to the maximum focal length fmax of optical lens 1, the constraints on the ratio of the total focal length fG1 of the first optical element G1 of optical lens 1 to the super-telephoto focal length fmax of optical lens 1, the constraints on the C value, the constraints on the ratio of the maximum travel delta of the movable optical element with the largest displacement in optical lens 1 to the zoom ratio Ra, the total optical length TTL and the image height IH, the constraints on the ratio of the cascaded magnification Mcc and Mc, and the constraints on the relationship between the focal length fq, the total optical length TTL and the zoom ratio Ra of the front lens group G11, etc., can exist independently or in combination. When the above ratio ranges are combined, the optical lens 1 can achieve better image stabilization, compactness, and strong zoom capability in a smaller volume.

[0274] Example 1:

[0275] Please refer to Figures 5 and 6. Figure 5 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the telephoto end in Embodiment 1, and Figure 6 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the ultra-telephoto end in Embodiment 1.

[0276] In some embodiments, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3, with light passing sequentially through the optical lens 1 and the filter 3 to the photosensitive element 2 for imaging. The optical lens 1 includes a first optical element G1 and a second optical element G2, with the second optical element G2 located on the image side of the first optical element G1.

[0277] The first optical element G1 includes a front lens group G11, an optical path deflection element G12, and a rear lens group G13.

[0278] For example, the front lens group G11 may include a lens, namely the first lens L1. The optical path reversing element G12 may be a prism, which is used to change the optical axis from a first direction to a second direction. The rear lens group G13 may include a lens, namely the second lens L2.

[0279] For example, the first lens L1, the optical path reversing element G12, and the second lens L2 have the same refractive index. Therefore, the first lens L1 and the second lens L2 can be fixedly connected to the optical path reversing element G12 by adhesive. The first lens L1, the optical path reversing element G12, and the second lens L2 can also be formed into a single component by integral molding.

[0280] For example, the first lens L1 has positive optical power, and the second lens L2 has negative optical power. The object-side surface of the first lens L1 is convex, and the image-side surface of the second lens L2 is concave.

[0281] The second optical element G2 includes a first lens group G21 and a second lens group G22. The second lens group G22 is located on the image side of the first lens group G21.

[0282] For example, the first lens group G21 may include three lenses, namely a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged sequentially from the object side to the image side. The first lens group G21 is a movable lens group, which can move along its optical axis.

[0283] For example, the second lens group G22 may include three lenses, namely a seventh lens L7, an eighth lens L8, and a ninth lens L9 arranged sequentially from the object side to the image side. The second lens group G22 is a movable lens group, capable of moving along its optical axis.

[0284] In this embodiment, the first lens L1, the optical path folding element G12, and the second lens L2 are relatively fixed, and the three can rotate together to achieve image stabilization of the optical lens 1. Therefore, through the cooperation of the first lens L1, the optical path folding element G12, and the second lens L2, the optical lens 1 has strong image stabilization capability, good image quality, and small size.

[0285] Furthermore, the first lens group G21 and the second lens group G22 achieve zooming and / or focusing of the optical lens 1 by moving. Due to the arrangement of the first optical element G1, the first lens group G21 and the second lens group G22 can easily have a large setting space and movement space, which is conducive to giving the optical lens 1 a strong zooming and / or focusing capability and improving the shooting capability of the optical lens 1.

[0286] In the camera module 30, the photosensitive element 2 can be perpendicular to the optical axis of the second lens group G22. There is no need to set up additional components to fold the optical path for the photosensitive element 2, which is beneficial to provide more space for other optical components, thereby improving the compactness of the camera module 30 and facilitating the miniaturization of the camera module 30.

[0287] In some embodiments, the second optical element G2 of the optical lens 1 may further include a third lens group G23 and a fourth lens group G24. The third lens group G23 is located between the first optical element G1 and the first lens group G21, and the fourth lens group G24 is located on the image side of the second lens group G22.

[0288] For example, the third lens group G23 and the fourth lens group G24 can each be fixed optical elements.

[0289] For example, the third lens group G23 may include a single lens, namely the third lens L3.

[0290] For example, the fourth lens group G24 may include a lens, namely the tenth lens L10.

[0291] In this embodiment, by setting the third lens group G23 and the fourth lens group G24, the optical lens 1 has more lenses or optical elements, which makes it easier to improve the imaging quality of the optical lens 1 by coordinating the optical power, refractive index and other parameters of multiple optical elements, and also makes the design of the optical lens 1 simpler.

[0292] In some embodiments, during the process of changing the optical lens 1 from the telephoto end to the super telephoto end, the position of the first optical element G1 remains fixed, while the first lens group G21 and the second lens group G22 both move along the second direction toward the first optical element G1. That is, the distance between the first lens group G21 and the first optical element G1 decreases, the distance between the second lens group G22 and the first optical element G1 decreases, the effective focal length of the optical lens 1 increases, and the magnification of the optical lens 1 increases. During zooming between the telephoto and super telephoto ends, and at other focal lengths between the telephoto and super telephoto ends, the position of the image plane of the optical lens 1 relative to the first optical element G1 remains unchanged, and the image height remains unchanged, ensuring full utilization of the photosensitive element 2 of the camera module 30 and achieving continuous lossless zoom.

[0293] Please refer to Tables 1a and 1b. Table 1a shows the radius of curvature R, airgap, refractive index, and Abbe number of each lens, light folding element, and filter in the camera module 30 shown in Figure 1 in Embodiment 1. The airgap includes the thickness of the structure itself and the spacing between structures; 1E+18 (scientific notation) refers to infinity. Table 1b shows the aspherical coefficients of each lens of the optical lens 1 of the camera module 30 shown in Figure 1 in Embodiment 1.

[0294] Wherein, "S1" represents the incident surface, "S2" represents the exit surface, "L" represents the lens, and "zoom (super telephoto)" represents the interval at the super telephoto end. Specifically, L1 is the first lens, L2 is the second lens, L3 is the third lens, L4 is the fourth lens, L5 is the fifth lens, L6 is the sixth lens, L7 is the seventh lens, L8 is the eighth lens, L9 is the ninth lens, and L10 is the tenth lens.

[0295] Table 1a

[0296] Table 1b

[0297] The aspherical surfaces in optical lens 11 in Tables 1a and 1b can be defined using, but are not limited to, the following aspherical curve equations:

[0298] Where z is a point on the aspherical surface at a distance r from the optical axis, and its relative distance to the tangent plane at the intersection point on the optical axis of the aspherical surface; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; k is the conic coefficient; αi is the i-th order aspherical coefficient, which can be found in Table 1b. Lenses L1, L2, L3, L4, L5, L6, L7, L8, L9, and L10 are all aspherical surfaces.

[0299] Please refer to Tables 1c and 1d. Table 1c shows the basic parameters of the camera module 30 shown in Figure 1 in Embodiment 1, and Table 1d shows the relationship between the parameters in Table 1c.

[0300] In Table 1c, fmax is the focal length of optical lens 1 at the super-telephoto end, fmin is the focal length of optical lens 1 at the telephoto end, fG1 is the focal length of the first optical element G1, fG21 is the focal length of the first lens group G21, fG22 is the focal length of the second lens group G22, fG23 is the focal length of the third lens group G23, fG24 is the focal length of the fourth lens group G24, Ra is the zoom ratio of optical lens 1, IH is the image height of optical lens 1, TTL is the total optical length of optical lens 1, delta is the maximum travel distance of the movable optical element with the largest displacement in optical lens 1, FOVmax is the maximum field of view of optical lens 1, FOVmin is the minimum field of view of optical lens 1, fq is the focal length of the first lens, and fc is the focal length of the second lens. The values ​​of fmax, fmin, fG1, fG21, fG22, fG23, fG24, fq, and fc are all valid values ​​in millimeters.

[0301] Table 1c

[0302] Table 1d

[0303] In some embodiments, for example, the first optical element G1 satisfies: (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<0.05. Wherein, the sag at any point of the same aperture on the object-side surface of the first lens L1 and the image-side surface of the second lens L2 satisfies the above formula. In this case, by setting the relationship between the surface shape of the object-side surface of the first lens L1, the refractive index of the first lens L1, the surface shape of the image-side surface of the second lens L2, and the refractive index of the second lens L2, the second lens L2 is made more compatible with the first lens L1. During image stabilization, the first lens L1 and the second lens L2 can achieve dynamic aberration compensation, thereby reducing aberrations in the optical lens 1 during image stabilization and achieving better image stabilization performance.

[0304] In some embodiments, the ratio of the focal length fq of the first lens L1 to the focal length fc of the second lens L2, fq / fc, is -0.89.

[0305] In some embodiments, the ratio of the focal length fq of the first lens L1 to the maximum focal length fmax of the optical lens 1, fq / fmax, is 0.5.

[0306] In some embodiments, the ratio of the focal length fc of the second lens L2 to the maximum focal length fmax of the optical lens 1, fc / fmax, is -0.55. The absolute values ​​of the focal length fq of the first lens L1 and the focal length fc of the second lens L2 are relatively close, and the value is relatively small compared to the maximum focal length fmax of the optical lens 1. This is beneficial to improving the image stabilization capability and image quality of the optical lens 1, and also to improving the compactness of the optical lens 1.

[0307] In some embodiments, the maximum travel distance of the second lens group G22 is greater than that of the first lens group G21, and the ratio of the maximum travel distance delta of the second lens group G22 to the total optical length TTL, delta / TTL, is 0.20. This is beneficial for ensuring that the second lens group G22 has suitable sensitivity, making it easier to manufacture and zoom.

[0308] In some embodiments, the ratio of the total optical length TTL to the zoom ratio Ra, TTL / Ra, is 20.44. In this case, the optical lens 1 has strong zoom capability and high compactness.

[0309] In some embodiments, the relationship between the focal length fq of the first lens L1, the total optical length TTL, and the zoom ratio Ra, i.e., fq / (TTL / Ra), is 0.83. Properly setting the focal length fq of the first lens L1 is beneficial for achieving strong zoom capability and high compactness in the optical lens 1.

[0310] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the image height IH, delta / IH, is 0.57.

[0311] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the zoom ratio Ra is delta / Ra, which is 4.10.

[0312] In some embodiments, the relationship between the maximum focal length fmax, zoom ratio Ra, image height IH, and total optical length TTL of optical lens 1 is fmax*Ra*IH / TTL, i.e., the C value is 17.32. Optical lens 1 has good overall performance.

[0313] In some embodiments, the ratio fG1 / fmax of the total focal length fG1 of the first optical element G1 to the maximum focal length fmax of the optical lens 1 is 1.75.

[0314] In some embodiments, the ratio of the focal length fG21 of the first lens group G21 to the maximum focal length fmax of the optical lens 1, fG21 / fmax, is 0.26, and the ratio of the focal length fG22 of the second lens group G22 to the maximum focal length fmax of the optical lens 1, fG22 / fmax, is -0.26. The close absolute values ​​of the focal lengths fG21 and fG22 of the first and second lens groups are beneficial for improving image quality.

[0315] In some embodiments, when the optical lens 1 is at the telephoto end, the cascaded magnification of the first lens group G21 is -0.18, and the cascaded magnification of the second lens group G22 is 1.53. When the optical lens 1 is at the super telephoto end, the cascaded magnification of the first lens group G21 is -0.20, and the cascaded magnification of the second lens group G22 is 2.11.

[0316] Therefore, the ratio Mcc / Mc of the total cascaded magnification Mc of the second lens group G22 at the super telephoto end to the total cascaded magnification Mc of the second lens group G22 at the telephoto end is 1.38. The large cascaded magnification of the second lens group G22 is beneficial for optical lens 1 to have a larger zoom ratio.

[0317] Please refer to Figures 7a to 8b. Figure 7a is the astigmatism curve of the camera module 30 shown in Figure 5, Figure 7b is the distortion curve of the camera module 30 shown in Figure 5, Figure 8a is the astigmatism curve of the camera module 30 shown in Figure 6, and Figure 8b is the distortion curve of the camera module 30 shown in Figure 6.

[0318] The astigmatism plot is used to illustrate the deviation of the convergence point (image height) of the fine beam in different fields of view from the ideal imaging plane. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When the value of a certain field of view is too large, the image quality of that field of view is poor or there are high-order aberrations. In the astigmatism plot shown in Figure 7a, the field curvature in both directions is small, and the system has a good depth of focus. The distortion plot is used to characterize the relative deviation of the convergence point (actual image height) of the beam in different fields of view from the ideal image height. In the distortion plot shown in Figure 7b, the relative deviation is within 2.5%, which ensures that there is no obvious distortion in the image.

[0319] In the bokeh curve diagram shown in Figure 8a, the field curvature in both directions is relatively small, indicating that the system has good depth of focus. In the distortion diagram shown in Figure 8b, the relative deviations are all within 2.5%, ensuring that there is no obvious distortion in the image.

[0320] Example 2

[0321] Please refer to Figures 9 and 10. Figure 9 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the telephoto end in Embodiment 2, and Figure 10 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the ultra-telephoto end in some embodiments.

[0322] In some embodiments, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3, with light passing sequentially through the optical lens 1 and the filter 3 to the photosensitive element 2 for imaging. The optical lens 1 includes a first optical element G1 and a second optical element G2, with the second optical element G2 located on the image side of the first optical element G1.

[0323] The first optical element G1 includes a front lens group G11, an optical path deflection element G12, and a rear lens group G13.

[0324] For example, the front lens group G11 may include a lens, namely the first lens L1. The optical path reversing element G12 may be a prism, which is used to change the optical axis from a first direction to a second direction. The rear lens group G13 may include a lens, namely the second lens L2.

[0325] For example, the first lens L1, the optical path reversing element G12, and the second lens L2 have different refractive indices. Therefore, the first lens L1 and the second lens L2 can be fixedly connected to the optical path reversing element G12 by adhesive. The first lens L1, the optical path reversing element G12, and the second lens L2 can also be formed into an integral component by fixing with structural parts.

[0326] For example, the first lens L1 has positive optical power, and the second lens L2 has negative optical power. The object-side surface of the first lens L1 is convex, and the image-side surface of the second lens L2 is concave.

[0327] The second optical element G2 includes a first lens group G21 and a second lens group G22. The second lens group G22 is located on the image side of the first lens group G21.

[0328] For example, the first lens group G21 may include three lenses, namely a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged sequentially from the object side to the image side. The first lens group G21 is a movable lens group, which can move along its optical axis.

[0329] For example, the second lens group G22 may include three lenses, namely a seventh lens L7, an eighth lens L8, and a ninth lens L9 arranged sequentially from the object side to the image side. The second lens group G22 is a movable lens group, capable of moving along its optical axis.

[0330] In this embodiment, the first lens L1, the optical path folding element G12, and the second lens L2 are relatively fixed, and the three can rotate together to achieve image stabilization of the optical lens 1. Therefore, through the cooperation of the first lens L1, the optical path folding element G12, and the second lens L2, the optical lens 1 has strong image stabilization capability, good image quality, and small size.

[0331] Furthermore, the first lens group G21 and the second lens group G22 achieve zooming and / or focusing of the optical lens 1 by moving. Due to the arrangement of the first optical element G1, the first lens group G21 and the second lens group G22 can easily have a large setting space and movement space, which is conducive to giving the optical lens 1 a strong zooming and / or focusing capability and improving the shooting capability of the optical lens 1.

[0332] In this embodiment, the photosensitive element 2 can be perpendicular to the optical axis of the second lens group G22, eliminating the need for additional elements to fold the optical path for the photosensitive element 2. This provides more space for other optical elements, thereby improving the compactness of the camera module 30 and facilitating its miniaturization.

[0333] In some embodiments, the second optical element G2 of the optical lens 1 may further include a third lens group G23 and a fourth lens group G24. The third lens group G23 is located between the first optical element G1 and the first lens group G21, and the fourth lens group G24 is located on the image side of the second lens group G22.

[0334] For example, the third lens group G23 and the fourth lens group G24 can each be fixed optical elements.

[0335] For example, the third lens group G23 may include a single lens, namely the third lens L3.

[0336] For example, the fourth lens group G24 may include a lens, namely the tenth lens L10.

[0337] In this embodiment, by setting the third lens group G23 and the fourth lens group G24, the optical lens 1 has more lenses or optical elements, which makes it easier to improve the imaging quality of the optical lens 1 by coordinating the optical power, refractive index and other parameters of multiple optical elements, and also makes the design of the optical lens 1 simpler.

[0338] In some embodiments, during the process of changing the optical lens 1 from the telephoto end to the super telephoto end, the position of the first optical element G1 remains fixed, while the first lens group G21 and the second lens group G22 both move along the second direction toward the first optical element G1. That is, the distance between the first lens group G21 and the first optical element G1 decreases, the distance between the second lens group G22 and the first optical element G1 decreases, the effective focal length of the optical lens 1 increases, and the magnification of the optical lens 1 increases. During zooming between the telephoto and super telephoto ends, and at other focal lengths between the telephoto and super telephoto ends, the position of the image plane of the optical lens 1 relative to the first optical element G1 remains unchanged, and the image height remains unchanged, ensuring full utilization of the photosensitive element 2 of the camera module 30 and achieving continuous lossless zoom.

[0339] Please refer to Tables 2a and 2b. Table 2a shows the radius of curvature R, airgap, refractive index, and Abbe number of each lens, light folding element, and filter in the camera module 30 shown in Figure 1 in Embodiment 2. The airgap includes the thickness of the structure itself and the spacing between structures; 1E+18 (scientific notation) refers to infinity. Table 2b shows the aspherical coefficients of each lens of the optical lens 1 of the camera module 30 shown in Figure 1 in Embodiment 2.

[0340] Wherein, "S1" represents the incident surface, "S2" represents the exit surface, "L" represents the lens, and "zoom (super telephoto)" represents the interval at the super telephoto end. Specifically, L1 is the first lens, L2 is the second lens, L3 is the third lens, L4 is the fourth lens, L5 is the fifth lens, L6 is the sixth lens, L7 is the seventh lens, L8 is the eighth lens, L9 is the ninth lens, and L10 is the tenth lens.

[0341] Table 2a

[0342] Table 2b

[0343] The aspherical surfaces in optical lens 11 in Tables 2a and 2b can be defined using, but are not limited to, the following aspherical curve equations:

[0344] Where z is a point on the aspherical surface at a distance r from the optical axis, and its relative distance to the tangent plane at the intersection point on the optical axis of the aspherical surface; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; k is the conic coefficient; αi is the i-th order aspherical coefficient, which can be found in Table 2b. Lenses L1, L2, L3, L4, L5, L6, L7, L8, L9, and L10 are all aspherical surfaces.

[0345] Please refer to Tables 2c and 2d. Table 2c shows the basic parameters of the camera module 30 shown in Figure 1 in Embodiment 2, and Table 2d shows the relationship between the parameters in Table 2c.

[0346] In Table 2c, fmax is the focal length of optical lens 1 at the super-telephoto end, fmin is the focal length of optical lens 1 at the telephoto end, fG1 is the focal length of the first optical element G1, fG21 is the focal length of the first lens group G21, fG22 is the focal length of the second lens group G22, fG23 is the focal length of the third lens group G23, fG24 is the focal length of the fourth lens group G24, Ra is the zoom ratio of optical lens 1, IH is the image height of optical lens 1, TTL is the total optical length of optical lens 1, delta is the maximum travel distance of the movable optical element with the largest displacement in optical lens 1, FOVmax is the maximum field of view of optical lens 1, FOVmin is the minimum field of view of optical lens 1, fq is the focal length of the first lens, and fc is the focal length of the second lens. The values ​​of fmax, fmin, fG1, fG21, fG22, fG23, fG24, fq, and fc are all valid values, and the unit is millimeters.

[0347] Table 2c

[0348] Table 2d

[0349] For example, the first optical element G1 satisfies: (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<0.02. Wherein, the sag at any point of the same aperture on the object-side surface of the first lens L1 and the image-side surface of the second lens L2 satisfies the above formula. In this case, by setting the relationship between the surface shape of the object-side surface of the first lens L1, the refractive index of the first lens L1, the surface shape of the image-side surface of the second lens L2, and the refractive index of the second lens L2, the second lens L2 is made more compatible with the first lens L1. During image stabilization, the first lens L1 and the second lens L2 can achieve dynamic aberration compensation, thereby reducing aberrations in the optical lens 1 during image stabilization and achieving better image stabilization performance.

[0350] In some embodiments, the ratio of the focal length fq of the first lens L1 to the focal length fc of the second lens L2, fq / fc, is -0.96.

[0351] In some embodiments, the ratio of the focal length fq of the first lens L1 to the maximum focal length fmax of the optical lens 1, fq / fmax, is 0.55.

[0352] In some embodiments, the ratio of the focal length fc of the second lens L2 to the maximum focal length fmax of the optical lens 1, fc / fmax, is -0.58. The absolute values ​​of the focal length fq of the first lens L1 and the focal length fc of the second lens L2 are relatively close, and the value is relatively small compared to the maximum focal length fmax of the optical lens 1. This is beneficial to improving the image stabilization capability and image quality of the optical lens 1, and also to improving the compactness of the optical lens 1.

[0353] In some embodiments, the maximum travel distance of the second lens group G22 is greater than that of the first lens group G21, and the ratio of the maximum travel distance delta of the second lens group G22 to the total optical length TTL, delta / TTL, is 0.26. This is beneficial for ensuring that the second lens group G22 has suitable sensitivity, making it easier to manufacture and zoom.

[0354] In some embodiments, the ratio of total optical length TTL to zoom ratio Ra, TTL / Ra, is 22.46. In this case, the optical lens 1 has strong zoom capability and high compactness.

[0355] In some embodiments, the relationship between the focal length fq of the first lens L1, the total optical length TTL, and the zoom ratio Ra, i.e., fq / (TTL / Ra), is 1.02. Properly setting the focal length fq of the first lens L1 is beneficial for achieving strong zoom capability and high compactness in the optical lens 1.

[0356] In some embodiments, the ratio of the maximum travel distance delta of the second lens group G22 to the image height IH, delta / IH, is 0.8.

[0357] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the zoom ratio Ra is delta / Ra, which is 5.83.

[0358] In some embodiments, the relationship between the maximum focal length fmax, zoom ratio Ra, image height IH, and total optical length TTL of optical lens 1 is fmax*Ra*IH / TTL, i.e., the C value is 23.10. Optical lens 1 has good overall performance.

[0359] In some embodiments, the ratio fG1 / fmax of the total focal length fG1 of the first optical element G1 to the maximum focal length fmax of the optical lens 1 is 1.93.

[0360] In some embodiments, the ratio of the focal length fG21 of the first lens group G21 to the maximum focal length fmax of the optical lens 1, fG21 / fmax, is 0.29, and the ratio of the focal length fG22 of the second lens group G22 to the maximum focal length fmax of the optical lens 1, fG22 / fmax, is -0.30. The close absolute values ​​of the focal lengths fG21 of the first lens group G21 and fG22 of the second lens group G22 are beneficial for improving image quality.

[0361] In some embodiments, when the optical lens 1 is at the telephoto end, the cascaded magnification of the first lens group G21 is -0.18, and the cascaded magnification of the second lens group G22 is 1.39. When the optical lens 1 is at the super telephoto end, the cascaded magnification of the first lens group G21 is -0.20, and the cascaded magnification of the second lens group G22 is 2.18.

[0362] Therefore, the ratio Mcc / Mc of the total cascaded magnification Mc of the second lens group G22 at the super telephoto end to the total cascaded magnification Mc of the second lens group G22 at the telephoto end is 1.56. The large cascaded magnification of the second lens group G22 is beneficial for optical lens 1 to have a larger zoom ratio.

[0363] Please refer to Figures 11a to 12b. Figure 11a is the astigmatism curve of the camera module 30 shown in Figure 9, Figure 11b is the distortion curve of the camera module 30 shown in Figure 9, Figure 12a is the astigmatism curve of the camera module 30 shown in Figure 10, and Figure 12b is the distortion curve of the camera module 30 shown in Figure 10.

[0364] The astigmatism plot is used to illustrate the deviation of the convergence point (image height) of the fine beam in different fields of view from the ideal imaging plane. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When the value of a certain field of view is too large, the image quality of that field of view is poor or there are high-order aberrations. In the astigmatism plot shown in Figure 11a, the field curvature in both directions is small, and the system has a good depth of focus. The distortion plot is used to characterize the relative deviation of the convergence point (actual image height) of the beam in different fields of view from the ideal image height. In the distortion plot shown in Figure 11b, the relative deviation is within 2.5%, which ensures that there is no obvious distortion in the image.

[0365] In the bokeh curve shown in Figure 12a, the field curvature in both directions is small, indicating that the system has good depth of focus. In the distortion curve shown in Figure 12b, the relative deviations are all within 2%, ensuring that there is no obvious distortion in the image.

[0366] Example 3

[0367] Please refer to Figures 13 and 14. Figure 13 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the telephoto end in Embodiment 3, and Figure 14 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the ultra-telephoto end in Embodiment 3.

[0368] In some embodiments, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3, with light passing sequentially through the optical lens 1 and the filter 3 to the photosensitive element 2 for imaging. The optical lens 1 includes a first optical element G1 and a second optical element G2, with the second optical element G2 located on the image side of the first optical element G1.

[0369] The first optical element G1 includes a front lens group G11, an optical path deflection element G12, and a rear lens group G13.

[0370] For example, the front lens group G11 may include a lens, namely the first lens L1. The optical path reversing element G12 may be a prism, which is used to change the optical axis from a first direction to a second direction. The rear lens group G13 may include a lens, namely the second lens L2.

[0371] For example, the first lens L1, the optical path refraction element G12, and the second lens L2 have different refractive indices. Therefore, the first lens L1 and the second lens L2 can be fixedly connected to the optical path refraction element G12 by adhesive. The first lens L1, the optical path refraction element G12, and the second lens L2 can also be formed into a single component by fixing them together with structural parts.

[0372] For example, the first lens L1 has positive optical power, and the second lens L2 has negative optical power. The object-side surface of the first lens L1 is convex, and the image-side surface of the second lens L2 is concave.

[0373] The second optical element G2 includes a first lens group G21 and a second lens group G22. The second lens group G22 is located on the image side of the first lens group G21.

[0374] For example, the first lens group G21 may include three lenses, namely a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged sequentially from the object side to the image side. The first lens group G21 is a movable lens group, which can move along its optical axis.

[0375] For example, the second lens group G22 may include three lenses, namely a seventh lens L7, an eighth lens L8, and a ninth lens L9 arranged sequentially from the object side to the image side. The second lens group G22 is a movable lens group, capable of moving along its optical axis.

[0376] In this embodiment, the first lens L1, the optical path folding element G12, and the second lens L2 are relatively fixed, and the three can rotate together to achieve image stabilization of the optical lens 1. Therefore, through the cooperation of the first lens L1, the optical path folding element G12, and the second lens L2, the optical lens 1 has strong image stabilization capability, good image quality, and small size.

[0377] Furthermore, the first lens group G21 and the second lens group G22 achieve zooming and / or focusing of the optical lens 1 by moving. Due to the arrangement of the first optical element G1, the first lens group G21 and the second lens group G22 can easily have a large setting space and movement space, which is conducive to giving the optical lens 1 a strong zooming and / or focusing capability and improving the shooting capability of the optical lens 1.

[0378] In this embodiment, the photosensitive element 2 can be perpendicular to the optical axis of the second lens group G22, eliminating the need for additional elements to fold the optical path for the photosensitive element 2. This provides more space for other optical elements, thereby improving the compactness of the camera module 30 and facilitating its miniaturization.

[0379] In some embodiments, the second optical element G2 of the optical lens 1 may further include a third lens group G23 and a fourth lens group G24. The third lens group G23 is located between the first optical element G1 and the first lens group G21, and the fourth lens group G24 is located on the image side of the second lens group G22.

[0380] For example, the third lens group G23 and the fourth lens group G24 can each be fixed optical elements.

[0381] For example, the third lens group G23 may include a single lens, namely the third lens L3.

[0382] For example, the fourth lens group G24 may include a lens, namely the tenth lens L10.

[0383] In this embodiment, by setting the third lens group G23 and the fourth lens group G24, the optical lens 1 has more lenses or optical elements, which makes it easier to improve the imaging quality of the optical lens 1 by coordinating the optical power, refractive index and other parameters of multiple optical elements, and also makes the design of the optical lens 1 simpler.

[0384] In some embodiments, during the process of changing the optical lens 1 from the telephoto end to the super telephoto end, the position of the first optical element G1 remains fixed, while the first lens group G21 and the second lens group G22 both move along the second direction toward the first optical element G1. That is, the distance between the first lens group G21 and the first optical element G1 decreases, the distance between the second lens group G22 and the first optical element G1 decreases, the effective focal length of the optical lens 1 increases, and the magnification of the optical lens 1 increases. During zooming between the telephoto and super telephoto ends, and at other focal lengths between the telephoto and super telephoto ends, the position of the image plane of the optical lens 1 relative to the first optical element G1 remains unchanged, and the image height remains unchanged, ensuring full utilization of the photosensitive element 2 of the camera module 30 and achieving continuous lossless zoom.

[0385] Please refer to Tables 3a and 3b. Table 3a shows the radius of curvature R, airgap, refractive index, and Abbe number of each lens, light folding element, and filter in Embodiment 3 of the camera module 30 shown in Figure 1. The airgap includes the thickness of the structure itself and the spacing between structures; 1E+18 (scientific notation) refers to infinity. Table 3b shows the aspherical coefficients of each lens of the optical lens 1 of the camera module 30 shown in Figure 1 in Embodiment 3.

[0386] Wherein, "S1" represents the incident surface, "S2" represents the exit surface, "L" represents the lens, and "zoom (super telephoto)" represents the interval at the super telephoto end. Specifically, L1 is the first lens, L2 is the second lens, L3 is the third lens, L4 is the fourth lens, L5 is the fifth lens, L6 is the sixth lens, L7 is the seventh lens, L8 is the eighth lens, L9 is the ninth lens, and L10 is the tenth lens.

[0387] Table 3a

[0388] Table 3b

[0389] The aspherical surfaces in optical lens 11 in Tables 3a and 3b can be defined using, but are not limited to, the following aspherical curve equations:

[0390] Where z is a point on the aspherical surface at a distance r from the optical axis, and its relative distance to the tangent plane at the intersection point on the optical axis of the aspherical surface; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; k is the conic coefficient; αi is the i-th order aspherical coefficient, which can be found in Table 3b. Lenses L1, L2, L3, L4, L5, L6, L7, L8, L9, and L10 are all aspherical surfaces.

[0391] Please refer to Tables 3c and 3d. Table 3c shows the basic parameters of the camera module 30 shown in Figure 1 in Embodiment 3, and Table 3d shows the relationship between the parameters in Table 3c.

[0392] In Table 3c, fmax is the focal length of optical lens 1 at the super telephoto end, fmin is the focal length of optical lens 1 at the telephoto end, fG1 is the focal length of the first optical element G1, fG21 is the focal length of the first lens group G21, fG22 is the focal length of the second lens group G22, fG23 is the focal length of the third lens group G23, fG24 is the focal length of the fourth lens group G24, Ra is the zoom ratio of optical lens 1, IH is the image height of optical lens 1, TTL is the total optical length of optical lens 1, delta is the maximum travel distance of the movable optical element with the largest displacement in optical lens 1, FOVmax is the maximum field of view of optical lens 1, FOVmin is the minimum field of view of optical lens 1, fq is the focal length of the first lens, and fc is the focal length of the second lens. The values ​​of fmax, fmin, fG1, fG21, fG22, fG23, fG24, fq, and fc are all valid values, and the unit is millimeters.

[0393] Table 3c

[0394] Table 3d

[0395] In some embodiments, the first optical element G1 satisfies: (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<0.03. Wherein, the sag at any point of the same aperture on the object-side surface of the first lens L1 and the image-side surface of the second lens L2 satisfies the above formula. In this case, by setting the relationship between the surface shape of the object-side surface of the first lens L1, the refractive index of the first lens L1, the surface shape of the image-side surface of the second lens L2, and the refractive index of the second lens L2, the second lens L2 is made more compatible with the first lens L1. During image stabilization, the first lens L1 and the second lens L2 can achieve dynamic aberration compensation, thereby reducing aberrations in the optical lens 1 during image stabilization and achieving better image stabilization performance.

[0396] In some embodiments, the ratio of the focal length fq of the first lens L1 to the focal length fc of the second lens L2, fq / fc, is -0.97.

[0397] In some embodiments, the ratio of the focal length fq of the first lens L1 to the maximum focal length fmax of the optical lens 1, fq / fmax, is 0.54.

[0398] In some embodiments, the ratio of the focal length fc of the second lens L2 to the maximum focal length fmax of the optical lens 1, fc / fmax, is -0.56. The absolute values ​​of the focal length fq of the first lens L1 and the focal length fc of the second lens L2 are relatively close, and the value is relatively small compared to the maximum focal length fmax of the optical lens 1. This is beneficial to improving the image stabilization capability and image quality of the optical lens 1, and also to improving the compactness of the optical lens 1.

[0399] In some embodiments, the maximum travel distance of the second lens group G22 is greater than that of the first lens group G21, and the ratio of the maximum travel distance delta of the second lens group G22 to the total optical length TTL, delta / TTL, is 0.28. This is beneficial for ensuring that the second lens group G22 has suitable sensitivity, making it easy to manufacture and zoom.

[0400] In some embodiments, the ratio of the total optical length (TTL) to the zoom ratio (Ra) (TTL / Ra) is 21.75. In this case, the optical lens 1 has strong zoom capability and high compactness.

[0401] In some embodiments, the relationship between the focal length fq of the first lens L1, the total optical length TTL, and the zoom ratio Ra, i.e., fq / (TTL / Ra), is 1.17. Properly setting the focal length fq of the first lens L1 is beneficial for achieving strong zoom capability and high compactness in the optical lens 1.

[0402] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the image height IH, delta / IH, is 0.98.

[0403] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the zoom ratio Ra is delta / Ra, which is 6.15.

[0404] In some embodiments, the relationship between the maximum focal length fmax, zoom ratio Ra, image height IH, and total optical length TTL of optical lens 1 is fmax*Ra*IH / TTL, i.e., the C value is 27.07. Optical lens 1 has good overall performance.

[0405] In some embodiments, the ratio fG1 / fmax of the total focal length fG1 of the first optical element G1 to the maximum focal length fmax of the optical lens 1 is 1.92.

[0406] In some embodiments, the ratio of the focal length fG21 of the first lens group G21 to the maximum focal length fmax of the optical lens 1, fG21 / fmax, is 0.26, and the ratio of the focal length fG22 of the second lens group G22 to the maximum focal length fmax of the optical lens 1, fG22 / fmax, is -0.31. The close absolute values ​​of the focal lengths fG21 and fG22 of the first lens group G21 and the second lens group G22 are beneficial for improving image quality.

[0407] In some embodiments, when the optical lens 1 is at the telephoto end, the cascaded magnification of the first lens group G21 is -0.20, and the cascaded magnification of the second lens group G22 is 1.36. When the optical lens 1 is at the super telephoto end, the cascaded magnification of the first lens group G21 is -0.24, and the cascaded magnification of the second lens group G22 is 2.29.

[0408] Therefore, the ratio Mcc / Mc of the total cascaded magnification Mc of the second lens group G22 at the super telephoto end to the total cascaded magnification Mc of the second lens group G22 at the telephoto end is 1.68. The large cascaded magnification of the second lens group G22 is beneficial for optical lens 1 to have a larger zoom ratio.

[0409] Please refer to Figures 15a and 16b. Figure 15a is the astigmatism curve of the camera module 30 shown in Figure 13, Figure 15b is the distortion curve of the camera module 30 shown in Figure 13, Figure 16a is the astigmatism curve of the camera module 30 shown in Figure 14, and Figure 16b is the distortion curve of the camera module 30 shown in Figure 14.

[0410] The astigmatism plot is used to illustrate the deviation of the convergence point (image height) of the fine beam in different fields of view from the ideal imaging plane. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When the value of a certain field of view is too large, the image quality of that field of view is poor or there are high-order aberrations. In the astigmatism plot shown in Figure 15a, the field curvature in both directions is small, and the system has a good depth of focus. The distortion plot is used to characterize the relative deviation of the convergence point (actual image height) of the beam in different fields of view from the ideal image height. In the distortion plot shown in Figure 15b, the relative deviation is within 2.5%, which ensures that there is no obvious distortion in the image.

[0411] In the bokeh curve shown in Figure 16a, the field curvature in both directions is small, indicating that the system has good depth of focus. In the distortion curve shown in Figure 16b, the relative deviations are all within 2.5%, ensuring that there is no obvious distortion in the image.

[0412] Example 4

[0413] Please refer to Figures 17 and 18. Figure 17 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the telephoto end in Embodiment 4, and Figure 18 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the ultra-telephoto end in Embodiment 4.

[0414] In some embodiments, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3, with light passing sequentially through the optical lens 1 and the filter 3 to the photosensitive element 2 for imaging. The optical lens 1 includes a first optical element G1 and a second optical element G2, with the second optical element G2 located on the image side of the first optical element G1.

[0415] The first optical element G1 includes a front lens group G11, an optical path deflection element G12, and a rear lens group G13.

[0416] For example, the front lens group G11 may include a lens, namely the first lens L1. The optical path reversing element G12 may be a prism, which is used to change the optical axis from a first direction to a second direction. The rear lens group G13 may include a lens, namely the second lens L2.

[0417] For example, the first lens L1, the optical path refraction element G12, and the second lens L2 have different refractive indices. Therefore, the first lens L1 and the second lens L2 can be fixedly connected to the optical path refraction element G12 by adhesive. The first lens L1, the optical path refraction element G12, and the second lens L2 can also be formed into a single component by fixing them together with structural parts.

[0418] For example, the first lens L1 has positive optical power, and the second lens L2 has negative optical power. The object-side surface of the first lens L1 is convex, and the image-side surface of the second lens L2 is concave.

[0419] The second optical element G2 includes a first lens group G21 and a second lens group G22. The second lens group G22 is located on the image side of the first lens group G21.

[0420] For example, the first lens group G21 may include three lenses, namely a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged sequentially from the object side to the image side. The first lens group G21 is a movable lens group, which can move along its optical axis.

[0421] For example, the second lens group G22 may include three lenses, namely a seventh lens L7, an eighth lens L8, and a ninth lens L9 arranged sequentially from the object side to the image side. The second lens group G22 is a movable lens group, capable of moving along its optical axis.

[0422] In this embodiment, the first lens L1, the optical path folding element G12, and the second lens L2 are relatively fixed, and the three can rotate together to achieve image stabilization of the optical lens 1. Therefore, through the cooperation of the first lens L1, the optical path folding element G12, and the second lens L2, the optical lens 1 has strong image stabilization capability, good image quality, and small size.

[0423] Furthermore, the first lens group G21 and the second lens group G22 achieve zooming and / or focusing of the optical lens 1 by moving. Due to the arrangement of the first optical element G1, the first lens group G21 and the second lens group G22 can easily have a large setting space and movement space, which is conducive to giving the optical lens 1 a strong zooming and / or focusing capability and improving the shooting capability of the optical lens 1.

[0424] In this embodiment, the photosensitive element 2 can be perpendicular to the optical axis of the second lens group G22, eliminating the need for additional elements to fold the optical path for the photosensitive element 2. This provides more space for other optical elements, thereby improving the compactness of the camera module 30 and facilitating its miniaturization.

[0425] In some embodiments, the second optical element G2 of the optical lens 1 may further include a third lens group G23 and a fourth lens group G24. The third lens group G23 is located between the first optical element G1 and the first lens group G21, and the fourth lens group G24 is located on the image side of the second lens group G22.

[0426] For example, the third lens group G23 and the fourth lens group G24 can each be fixed optical elements.

[0427] For example, the third lens group G23 may include a single lens, namely the third lens L3.

[0428] For example, the fourth lens group G24 may include a lens, namely the tenth lens L10.

[0429] In this embodiment, by setting the third lens group G23 and the fourth lens group G24, the optical lens 1 has more lenses or optical elements, which makes it easier to improve the imaging quality of the optical lens 1 by coordinating the optical power, refractive index and other parameters of multiple optical elements, and also makes the design of the optical lens 1 simpler.

[0430] In some embodiments, during the process of changing the optical lens 1 from the telephoto end to the super telephoto end, the position of the first optical element G1 remains fixed, while the first lens group G21 and the second lens group G22 both move along the second direction toward the first optical element G1. That is, the distance between the first lens group G21 and the first optical element G1 decreases, the distance between the second lens group G22 and the first optical element G1 decreases, the effective focal length of the optical lens 1 increases, and the magnification of the optical lens 1 increases. During zooming between the telephoto and super telephoto ends, and at other focal lengths between the telephoto and super telephoto ends, the position of the image plane of the optical lens 1 relative to the first optical element G1 remains unchanged, and the image height remains unchanged, ensuring full utilization of the photosensitive element 2 of the camera module 30 and achieving continuous lossless zoom.

[0431] Please refer to Tables 4a and 4b. Table 4a shows the radius of curvature R, airgap, refractive index, and Abbe number of each lens, light folding element, and filter in Embodiment 4 of the camera module 30 shown in Figure 1. The airgap includes the thickness of the structure itself and the spacing between structures; 1E+18 (scientific notation) refers to infinity. Table 4b shows the aspherical coefficients of each lens of the optical lens 1 of the camera module 30 shown in Figure 1 in Embodiment 4.

[0432] In Table 4a, "S1" represents the incident surface, "S2" represents the exit surface, "L" represents the lens, and "zoom (super telephoto)" represents the interval at the super telephoto end. Among them, L1 is the first lens, L2 is the second lens, L3 is the third lens, L4 is the fourth lens, L5 is the fifth lens, L6 is the sixth lens, L7 is the seventh lens, L8 is the eighth lens, L9 is the ninth lens, and L10 is the tenth lens.

[0433] Table 4a

[0434] Table 4b

[0435] The aspherical surfaces in optical lens 11 in Tables 4a and 4b can be defined using, but are not limited to, the following aspherical curve equations:

[0436] Where z is a point on the aspherical surface at a distance r from the optical axis, and its relative distance to the tangent plane at the intersection point on the optical axis of the aspherical surface; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; k is the conic coefficient; αi is the i-th order aspherical coefficient, which can be found in Table 4b. Lenses L1, L2, L3, L4, L5, L6, L7, L8, L9, and L10 are all aspherical surfaces.

[0437] Please refer to Tables 4c and 4d. Table 4c shows the basic parameters of the camera module 30 shown in Figure 1 in Embodiment 4, and Table 4d shows the relationship between the parameters in Table 4c.

[0438] In Table 4c, fmax is the focal length of optical lens 1 at the super-telephoto end, fmin is the focal length of optical lens 1 at the telephoto end, fG1 is the focal length of the first optical element G1, fG21 is the focal length of the first lens group G21, fG22 is the focal length of the second lens group G22, fG23 is the focal length of the third lens group G23, fG24 is the focal length of the fourth lens group G24, Ra is the zoom ratio of optical lens 1, IH is the image height of optical lens 1, TTL is the total optical length of optical lens 1, delta is the maximum travel distance of the movable optical element with the largest displacement in optical lens 1, FOVmax is the maximum field of view of optical lens 1, FOVmin is the minimum field of view of optical lens 1, fq is the focal length of the first lens, and fc is the focal length of the second lens. The values ​​of fmax, fmin, fG1, fG21, fG22, fG23, fG24, fq, and fc are all valid values, and the unit is millimeters.

[0439] Table 4c

[0440] Table 4d

[0441] In some embodiments, the first optical element G1 satisfies: (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<0.02. Wherein, the sag at any point of the same aperture on the object-side surface of the first lens L1 and the image-side surface of the second lens L2 satisfies the above formula. In this case, by setting the relationship between the surface shape of the object-side surface of the first lens L1, the refractive index of the first lens L1, the surface shape of the image-side surface of the second lens L2, and the refractive index of the second lens L2, the second lens L2 is made more compatible with the first lens L1. During image stabilization, the first lens L1 and the second lens L2 can achieve dynamic aberration compensation, thereby reducing aberrations in the optical lens 1 during image stabilization and achieving better image stabilization performance.

[0442] In some embodiments, the ratio of the focal length fq of the first lens L1 to the focal length fc of the second lens L2, fq / fc, is -1.07.

[0443] In some embodiments, the ratio of the focal length fq of the first lens L1 to the maximum focal length fmax of the optical lens 1, fq / fmax, is 0.62.

[0444] In some embodiments, the ratio of the focal length fc of the second lens L2 to the maximum focal length fmax of the optical lens 1, fc / fmax, is -0.58. The absolute values ​​of the focal length fq of the first lens L1 and the focal length fc of the second lens L2 are relatively close, and the value is relatively small compared to the maximum focal length fmax of the optical lens 1. This is beneficial to improving the image stabilization capability and image quality of the optical lens 1, and also to improving the compactness of the optical lens 1.

[0445] In some embodiments, the maximum travel distance of the second lens group G22 is greater than that of the first lens group G21, and the ratio of the maximum travel distance delta of the second lens group G22 to the total optical length TTL, delta / TTL, is 0.30. This is beneficial for ensuring that the second lens group G22 has suitable sensitivity, making it easier to manufacture and zoom.

[0446] In some embodiments, the ratio of the total optical length (TTL) to the zoom ratio (Ra) (TTL / Ra) is 21.88. In this case, the optical lens 1 has strong zoom capability and high compactness.

[0447] In some embodiments, the relationship between the focal length fq of the first lens L1, the total optical length TTL, and the zoom ratio Ra, i.e., fq / (TTL / Ra), is 1.55. Properly setting the focal length fq of the first lens L1 is beneficial for achieving strong zoom capability and high compactness in the optical lens 1.

[0448] In some embodiments, the ratio of the maximum travel distance delta of the second lens group G22 to the image height IH, delta / IH, is 1.20.

[0449] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the zoom ratio Ra is delta / Ra, which is 6.56.

[0450] In some embodiments, the relationship between the maximum focal length fmax, zoom ratio Ra, image height IH, and total optical length TTL of optical lens 1 is fmax*Ra*IH / TTL, i.e., the C value is 31.43. Optical lens 1 has good overall performance.

[0451] In some embodiments, the ratio fG1 / fmax of the total focal length fG1 of the first optical element G1 to the maximum focal length fmax of the optical lens 1 is 2.80.

[0452] In some embodiments, the ratio of the focal length fG21 of the first lens group G21 to the maximum focal length fmax of the optical lens 1, fG21 / fmax, is 0.24, and the ratio of the focal length fG22 of the second lens group G22 to the maximum focal length fmax of the optical lens 1, fG22 / fmax, is -0.29. The close absolute values ​​of the focal lengths fG21 and fG22 of the first and second lens groups are beneficial for improving image quality.

[0453] In some embodiments, when the optical lens 1 is at the telephoto end, the cascaded magnification of the first lens group G21 is -0.32, and the cascaded magnification of the second lens group G22 is 1.46. When the optical lens 1 is at the super telephoto end, the cascaded magnification of the first lens group G21 is -0.46, and the cascaded magnification of the second lens group G22 is 2.40.

[0454] Therefore, the ratio Mcc / Mc of the total cascaded magnification Mc of the second lens group G22 at the super telephoto end to the total cascaded magnification Mc of the second lens group G22 at the telephoto end is 1.64. The large cascaded magnification of the second lens group G22 is beneficial for optical lens 1 to have a larger zoom ratio.

[0455] Please refer to Figures 19a to 20b. Figure 19a is the astigmatism curve of the camera module 30 shown in Figure 17, Figure 19b is the distortion curve of the camera module 30 shown in Figure 17, Figure 20a is the astigmatism curve of the camera module 30 shown in Figure 18, and Figure 20b is the distortion curve of the camera module 30 shown in Figure 18.

[0456] The astigmatism plot is used to illustrate the deviation of the convergence point (image height) of the fine beam in different fields of view from the ideal imaging plane. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When the value of a certain field of view is too large, the image quality of that field of view is poor or there are high-order aberrations. In the astigmatism plot shown in Figure 19a, the field curvature in both directions is small, and the system has a good depth of focus. The distortion plot is used to characterize the relative deviation of the convergence point (actual image height) of the beam in different fields of view from the ideal image height. In the distortion plot shown in Figure 19b, the relative deviation is within 2%, which ensures that there is no obvious distortion in the image.

[0457] In the bokeh curve diagram shown in Figure 20a, the field curvature in both directions is small, indicating that the system has good depth of focus. In the distortion diagram shown in Figure 20b, the relative deviations are all within 2%, ensuring that there is no obvious distortion in the image.

[0458] Example 5

[0459] Please refer to Figures 21 and 22. Figure 21 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the telephoto end in Embodiment 5, and Figure 22 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the ultra-telephoto end in Embodiment 5.

[0460] In some embodiments, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3, with light passing sequentially through the optical lens 1 and the filter 3 to the photosensitive element 2 for imaging. The optical lens 1 includes a first optical element G1 and a second optical element G2, with the second optical element G2 located on the image side of the first optical element G1.

[0461] The first optical element G1 includes a front lens group G11, an optical path deflection element G12, and a rear lens group G13.

[0462] For example, the front lens group G11 may include a lens, namely the first lens L1. The optical path reversing element G12 may be a prism, which is used to change the optical axis from a first direction to a second direction. The rear lens group G13 may include a lens, namely the second lens L2.

[0463] For example, the first lens L1, the optical path refraction element G12, and the second lens L2 have different refractive indices. The first lens L1 can be fixedly connected to the optical path refraction element G12 via a structural component. The second lens L2 can be fixedly connected to the optical path refraction element G12 by adhesive or by a structural component.

[0464] For example, the first lens L1 has positive optical power, and the second lens L2 has negative optical power. The object-side surface of the first lens L1 is convex, and the image-side surface of the second lens L2 is concave.

[0465] The second optical element G2 includes a first lens group G21 and a second lens group G22. The second lens group G22 is located on the image side of the first lens group G21.

[0466] For example, the first lens group G21 may include three lenses, namely a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged sequentially from the object side to the image side. The first lens group G21 is a movable lens group, which can move along its optical axis.

[0467] For example, the second lens group G22 may include three lenses, namely a seventh lens L7, an eighth lens L8, and a ninth lens L9 arranged sequentially from the object side to the image side. The second lens group G22 is a movable lens group, capable of moving along its optical axis.

[0468] In this embodiment, the first lens L1, the optical path folding element G12, and the second lens L2 are relatively fixed, and the three can rotate together to achieve image stabilization of the optical lens 1. Therefore, through the cooperation of the first lens L1, the optical path folding element G12, and the second lens L2, the optical lens 1 has strong image stabilization capability, good image quality, and small size.

[0469] Furthermore, the first lens group G21 and the second lens group G22 achieve zooming and / or focusing of the optical lens 1 by moving. Due to the arrangement of the first optical element G1, the first lens group G21 and the second lens group G22 can easily have a large setting space and movement space, which is conducive to giving the optical lens 1 a strong zooming and / or focusing capability and improving the shooting capability of the optical lens 1.

[0470] In this embodiment, the photosensitive element 2 can be perpendicular to the optical axis of the second lens group G22, eliminating the need for additional elements to fold the optical path for the photosensitive element 2. This provides more space for other optical elements, thereby improving the compactness of the camera module 30 and facilitating its miniaturization.

[0471] In some embodiments, the second optical element G2 of the optical lens 1 may further include a third lens group G23 and a fourth lens group G24. The third lens group G23 is located between the first optical element G1 and the first lens group G21, and the fourth lens group G24 is located on the image side of the second lens group G22.

[0472] For example, the third lens group G23 and the fourth lens group G24 can each be fixed optical elements.

[0473] For example, the third lens group G23 may include a single lens, namely the third lens L3.

[0474] For example, the fourth lens group G24 may include a lens, namely the tenth lens L10.

[0475] In this embodiment, by setting the third lens group G23 and the fourth lens group G24, the optical lens 1 has more lenses or optical elements, which makes it easier to improve the imaging quality of the optical lens 1 by coordinating the optical power, refractive index and other parameters of multiple optical elements, and also makes the design of the optical lens 1 simpler.

[0476] In some embodiments, during the process of changing the optical lens 1 from the telephoto end to the super telephoto end, the position of the first optical element G1 remains fixed, while the first lens group G21 and the second lens group G22 both move along the second direction toward the first optical element G1. That is, the distance between the first lens group G21 and the first optical element G1 decreases, the distance between the second lens group G22 and the first optical element G1 decreases, the effective focal length of the optical lens 1 increases, and the magnification of the optical lens 1 increases. During zooming between the telephoto and super telephoto ends, and at other focal lengths between the telephoto and super telephoto ends, the position of the image plane of the optical lens 1 relative to the first optical element G1 remains unchanged, and the image height remains unchanged, ensuring full utilization of the photosensitive element 2 of the camera module 30 and achieving continuous lossless zoom.

[0477] Please refer to Tables 5a and 5b. Table 5a lists the radius of curvature R, airgap, refractive index, and Abbe number of each lens, light folding element, and filter in Embodiment 5 of the camera module 30 shown in Figure 1. The airgap includes the thickness of the structure itself and the spacing between structures; 1E+18 (scientific notation) refers to infinity. Table 5b lists the aspherical coefficients of each lens of the optical lens 1 of the camera module 30 shown in Figure 1 in Embodiment 5.

[0478] Wherein, "S1" represents the incident surface, "S2" represents the exit surface, "L" represents the lens, and "zoom (super telephoto)" represents the interval at the super telephoto end. Specifically, L1 is the first lens, L2 is the second lens, L3 is the third lens, L4 is the fourth lens, L5 is the fifth lens, L6 is the sixth lens, L7 is the seventh lens, L8 is the eighth lens, L9 is the ninth lens, and L10 is the tenth lens.

[0479] Table 5a

[0480] Table 5b

[0481] The aspherical surfaces in optical lens 11 in Tables 5a and 5b can be defined using, but are not limited to, the following aspherical curve equations:

[0482] Where z is a point on the aspherical surface at a distance r from the optical axis, and its relative distance to the tangent plane at the intersection point on the optical axis of the aspherical surface; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; k is the conic coefficient; αi is the i-th order aspherical coefficient, which can be found in Table 5b. Lenses L1, L2, L3, L4, L5, L6, L7, L8, L9, and L10 are all aspherical surfaces.

[0483] Please refer to Tables 5c and 5d. Table 5c shows the basic parameters of the camera module 30 shown in Figure 1 in Embodiment 5, and Table 5d shows the relationship between the parameters in Table 5c.

[0484] In Table 5c, fmax is the focal length of optical lens 1 at the super-telephoto end, fmin is the focal length of optical lens 1 at the telephoto end, fG1 is the focal length of the first optical element G1, fG21 is the focal length of the first lens group G21, fG22 is the focal length of the second lens group G22, fG23 is the focal length of the third lens group G23, fG24 is the focal length of the fourth lens group G24, Ra is the zoom ratio of optical lens 1, IH is the image height of optical lens 1, TTL is the total optical length of optical lens 1, delta is the maximum travel distance of the movable optical element with the largest displacement in optical lens 1, FOVmax is the maximum field of view of optical lens 1, FOVmin is the minimum field of view of optical lens 1, fq is the focal length of the first lens, and fc is the focal length of the second lens. The values ​​of fmax, fmin, fG1, fG21, fG22, fG23, fG24, fq, and fc are all valid values, and the unit is millimeters.

[0485] Table 5c

[0486] Table 5d

[0487] In some embodiments, the first optical element G1 satisfies: (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<0.1. Wherein, the sag at any point of the same aperture on the object-side surface of the first lens L1 and the image-side surface of the second lens L2 satisfies the above formula. In this case, by setting the relationship between the surface shape of the object-side surface of the first lens L1, the refractive index of the first lens L1, the surface shape of the image-side surface of the second lens L2, and the refractive index of the second lens L2, the second lens L2 is made more compatible with the first lens L1. During image stabilization, the first lens L1 and the second lens L2 can achieve dynamic aberration compensation, thereby reducing aberrations in the optical lens 1 during image stabilization and achieving better image stabilization performance.

[0488] In some embodiments, the ratio of the focal length fq of the first lens L1 to the focal length fc of the second lens L2, fq / fc, is -0.97.

[0489] In some embodiments, the ratio of the focal length fq of the first lens L1 to the maximum focal length fmax of the optical lens 1, fq / fmax, is 0.58.

[0490] In some embodiments, the ratio of the focal length fc of the second lens L2 to the maximum focal length fmax of the optical lens 1, fc / fmax, is -0.60. The absolute values ​​of the focal length fq of the first lens L1 and the focal length fc of the second lens L2 are relatively close, and the value is relatively small compared to the maximum focal length fmax of the optical lens 1. This is beneficial to improving the image stabilization capability and image quality of the optical lens 1, and also to improving the compactness of the optical lens 1.

[0491] In some embodiments, the maximum travel distance of the second lens group G22 is greater than that of the first lens group G21, and the ratio of the maximum travel distance delta of the second lens group G22 to the total optical length TTL, delta / TTL, is 0.26. This is beneficial for ensuring that the second lens group G22 has suitable sensitivity, making it easier to manufacture and zoom.

[0492] In some embodiments, the ratio of the total optical length TTL to the zoom ratio Ra, TTL / Ra, is 22.75. In this case, the optical lens 1 has strong zoom capability and high compactness.

[0493] In some embodiments, the relationship between the focal length fq of the first lens L1, the total optical length TTL, and the zoom ratio Ra, i.e., fq / (TTL / Ra), is 1.07. Properly setting the focal length fq of the first lens L1 is beneficial for achieving strong zoom capability and high compactness in the optical lens 1.

[0494] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the image height IH, delta / IH, is 0.80.

[0495] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the zoom ratio Ra is delta / Ra, which is 5.83.

[0496] In some embodiments, the relationship between the maximum focal length fmax, zoom ratio Ra, image height IH, and total optical length TTL of optical lens 1 is fmax*Ra*IH / TTL, i.e., the C value is 22.80. Optical lens 1 has good overall performance.

[0497] In some embodiments, the ratio fG1 / fmax of the total focal length fG1 of the first optical element G1 to the maximum focal length fmax of the optical lens 1 is 2.08.

[0498] In some embodiments, the ratio of the focal length fG21 of the first lens group G21 to the maximum focal length fmax of the optical lens 1, fG21 / fmax, is 0.29, and the ratio of the focal length fG22 of the second lens group G22 to the maximum focal length fmax of the optical lens 1, fG22 / fmax, is -0.30. The close absolute values ​​of the focal lengths fG21 and fG22 of the first and second lens groups are beneficial for improving image quality.

[0499] In some embodiments, when the optical lens 1 is at the telephoto end, the cascaded magnification of the first lens group G21 is -0.19, and the cascaded magnification of the second lens group G22 is 1.38. When the optical lens 1 is at the super telephoto end, the cascaded magnification of the first lens group G21 is -0.21, and the cascaded magnification of the second lens group G22 is 2.17.

[0500] Therefore, the ratio Mcc / Mc of the total cascaded magnification Mc of the second lens group G22 at the super telephoto end to the total cascaded magnification Mc of the second lens group G22 at the telephoto end is 1.58. The large cascaded magnification of the second lens group G22 is beneficial for optical lens 1 to have a larger zoom ratio.

[0501] Please refer to Figures 23a and 24b. Figure 23a is the astigmatism curve of the camera module 30 shown in Figure 21, Figure 23b is the distortion curve of the camera module 30 shown in Figure 21, Figure 24a is the astigmatism curve of the camera module 30 shown in Figure 22, and Figure 24b is the distortion curve of the camera module 30 shown in Figure 22.

[0502] The astigmatism plot is used to illustrate the deviation of the convergence point (image height) of the fine beam in different fields of view from the ideal imaging plane. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When the value of a certain field of view is too large, the image quality of that field of view is poor or there are high-order aberrations. In the astigmatism plot shown in Figure 23a, the field curvature in both directions is small, and the system has a good depth of focus. The distortion plot is used to characterize the relative deviation of the convergence point (actual image height) of the beam in different fields of view from the ideal image height. In the distortion plot shown in Figure 23b, the relative deviation is within 2.5%, which ensures that there is no obvious distortion in the image.

[0503] In the bokeh curve diagram shown in Figure 24a, the field curvature in both directions is relatively small, indicating that the system has good depth of focus. In the distortion diagram shown in Figure 24b, the relative deviations are all within 2.5%, ensuring that there is no obvious distortion in the image.

[0504] Example 6

[0505] Please refer to Figures 25 and 26. Figure 25 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the telephoto end in Embodiment 6, and Figure 26 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the ultra-telephoto end in Embodiment 6.

[0506] In some embodiments, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3, with light passing sequentially through the optical lens 1 and the filter 3 to the photosensitive element 2 for imaging. The optical lens 1 includes a first optical element G1 and a second optical element G2, with the second optical element G2 located on the image side of the first optical element G1.

[0507] The first optical element G1 includes a front lens group G11, an optical path deflection element G12, and a rear lens group G13.

[0508] For example, the front lens group G11 may include a lens, namely the first lens L1. The optical path reversing element G12 may be a prism, which is used to change the optical axis from a first direction to a second direction. The rear lens group G13 may include a lens, namely the second lens L2.

[0509] For example, the first lens L1, the optical path refraction element G12, and the second lens L2 have different refractive indices. Therefore, the first lens L1 can be fixedly connected to the optical path refraction element G12 by adhesive bonding or by means of structural fixing. The second lens L2 can be fixedly connected to the optical path refraction element G12 by means of structural fixing.

[0510] For example, the first lens L1 has positive optical power, and the second lens L2 has negative optical power. The object-side surface of the first lens L1 is convex, and the image-side surface of the second lens L2 is concave.

[0511] The second optical element G2 includes a first lens group G21 and a second lens group G22. The second lens group G22 is located on the image side of the first lens group G21.

[0512] For example, the first lens group G21 may include three lenses, namely a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged sequentially from the object side to the image side. The first lens group G21 is a movable lens group, which can move along its optical axis.

[0513] For example, the second lens group G22 may include three lenses, namely a seventh lens L7, an eighth lens L8, and a ninth lens L9 arranged sequentially from the object side to the image side. The second lens group G22 is a movable lens group, capable of moving along its optical axis.

[0514] In this embodiment, the first lens L1, the optical path folding element G12, and the second lens L2 are relatively fixed, and the three can rotate together to achieve image stabilization of the optical lens 1. Therefore, through the cooperation of the first lens L1, the optical path folding element G12, and the second lens L2, the optical lens 1 has strong image stabilization capability, good image quality, and small size.

[0515] Furthermore, the first lens group G21 and the second lens group G22 achieve zooming and / or focusing of the optical lens 1 by moving. Due to the arrangement of the first optical element G1, the first lens group G21 and the second lens group G22 can easily have a large setting space and movement space, which is conducive to giving the optical lens 1 a strong zooming and / or focusing capability and improving the shooting capability of the optical lens 1.

[0516] In this embodiment, the photosensitive element 2 can be perpendicular to the optical axis of the second lens group G22, eliminating the need for additional elements to fold the optical path for the photosensitive element 2. This provides more space for other optical elements, thereby improving the compactness of the camera module 30 and facilitating its miniaturization.

[0517] In some embodiments, the second optical element G2 of the optical lens 1 may further include a third lens group G23 and a fourth lens group G24. The third lens group G23 is located between the first optical element G1 and the first lens group G21, and the fourth lens group G24 is located on the image side of the second lens group G22.

[0518] For example, the third lens group G23 and the fourth lens group G24 can each be fixed optical elements.

[0519] For example, the third lens group G23 may include a single lens, namely the third lens L3.

[0520] For example, the fourth lens group G24 may include a lens, namely the tenth lens L10.

[0521] In this embodiment, by setting the third lens group G23 and the fourth lens group G24, the optical lens 1 has more lenses or optical elements, which makes it easier to improve the imaging quality of the optical lens 1 by coordinating the optical power, refractive index and other parameters of multiple optical elements, and also makes the design of the optical lens 1 simpler.

[0522] In some embodiments, during the process of changing the optical lens 1 from the telephoto end to the super telephoto end, the position of the first optical element G1 remains fixed, while the first lens group G21 and the second lens group G22 both move along the second direction toward the first optical element G1. That is, the distance between the first lens group G21 and the first optical element G1 decreases, the distance between the second lens group G22 and the first optical element G1 decreases, the effective focal length of the optical lens 1 increases, and the magnification of the optical lens 1 increases. During zooming between the telephoto and super telephoto ends, and at other focal lengths between the telephoto and super telephoto ends, the position of the image plane of the optical lens 1 relative to the first optical element G1 remains unchanged, and the image height remains unchanged, ensuring full utilization of the photosensitive element 2 of the camera module 30 and achieving continuous lossless zoom.

[0523] Please refer to Tables 6a and 6b. Table 6a shows the radius of curvature R, airgap, refractive index, and Abbe number of each lens, light folding element, and filter in Embodiment 6 of the camera module 30 shown in Figure 1. The airgap includes the thickness of the structure itself and the spacing between structures; 1E+18 (scientific notation) refers to infinity. Table 6b shows the aspherical coefficients of each lens of the optical lens 1 of the camera module 30 shown in Figure 1 in Embodiment 6.

[0524] Wherein, "S1" represents the incident surface, "S2" represents the exit surface, "L" represents the lens, and "zoom (super telephoto)" represents the interval at the super telephoto end. Specifically, L1 is the first lens, L2 is the second lens, L3 is the third lens, L4 is the fourth lens, L5 is the fifth lens, L6 is the sixth lens, L7 is the seventh lens, L8 is the eighth lens, L9 is the ninth lens, and L10 is the tenth lens.

[0525] Table 6a

[0526] Table 6b

[0527] The aspherical surfaces in optical lens 11 in Tables 6a and 6b can be defined using, but are not limited to, the following aspherical curve equations:

[0528] Where z is a point on the aspherical surface at a distance r from the optical axis, and its relative distance to the tangent plane at the intersection point on the optical axis of the aspherical surface; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; k is the conic coefficient; αi is the i-th order aspherical coefficient, which can be found in Table 6b. The lenses are: L1 (first lens), L2 (second lens), L3 (third lens), L4 (fourth lens), L5 (fifth lens), L6 (sixth lens), L7 (seventh lens), L8 (eighth lens), L9 (ninth lens), and L10 (tenth lens).

[0529] Please refer to Tables 6c and 6d. Table 6c shows the basic parameters of the camera module 30 shown in Figure 1 in Embodiment Six, and Table 6d shows the relationship between the parameters in Table 6c.

[0530] In Table 6c, fmax is the focal length of optical lens 1 at the super-telephoto end, fmin is the focal length of optical lens 1 at the telephoto end, fG1 is the focal length of the first optical element G1, fG21 is the focal length of the first lens group G21, fG22 is the focal length of the second lens group G22, fG23 is the focal length of the third lens group G23, fG24 is the focal length of the fourth lens group G24, Ra is the zoom ratio of optical lens 1, IH is the image height of optical lens 1, TTL is the total optical length of optical lens 1, delta is the maximum travel distance of the movable optical element with the largest displacement in optical lens 1, FOVmax is the maximum field of view of optical lens 1, FOVmin is the minimum field of view of optical lens 1, fq is the focal length of the first lens, and fc is the focal length of the second lens. The values ​​of fmax, fmin, fG1, fG21, fG22, fG23, fG24, fq, and fc are all valid values, and the unit is millimeters.

[0531] Table 6c

[0532] Table 6d

[0533] In some embodiments, the first optical element G1 satisfies: (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<0.138. Wherein, the sag at any point of the same aperture on the object-side surface of the first lens L1 and the image-side surface of the second lens L2 satisfies the above formula. In this case, by setting the relationship between the surface shape of the object-side surface of the first lens L1, the refractive index of the first lens L1, the surface shape of the image-side surface of the second lens L2, and the refractive index of the second lens L2, the second lens L2 is made more compatible with the first lens L1. During image stabilization, the first lens L1 and the second lens L2 can achieve dynamic aberration compensation, thereby reducing aberrations in the optical lens 1 during image stabilization and achieving better image stabilization performance.

[0534] In some embodiments, the ratio of the focal length fq of the first lens L1 to the focal length fc of the second lens L2, fq / fc, is -1.

[0535] In some embodiments, the ratio fq / fmax of the focal length of the first lens L1 to the maximum focal length fmax of the optical lens 1 is 0.6.

[0536] In some embodiments, the ratio of the focal length fc of the second lens L2 to the maximum focal length fmax of the optical lens 1, fc / fmax, is -0.61. The absolute values ​​of the focal length fq of the first lens L1 and the focal length fc of the second lens L2 are relatively close, and the value is relatively small compared to the maximum focal length fmax of the optical lens 1. This is beneficial to improving the image stabilization capability and image quality of the optical lens 1, and also to improving the compactness of the optical lens 1.

[0537] In some embodiments, the maximum travel distance of the second lens group G22 is greater than that of the first lens group G21, and the ratio of the maximum travel distance delta of the second lens group G22 to the total optical length TTL, delta / TTL, is 0.24. This is beneficial for ensuring that the second lens group G22 has suitable sensitivity, making it easier to manufacture and zoom.

[0538] In some embodiments, the ratio of the total optical length TTL to the zoom ratio Ra, TTL / Ra, is 25.53. In this case, the optical lens 1 has strong zoom capability and high compactness.

[0539] In some embodiments, the relationship between the focal length fq of the first lens L1, the total optical length TTL, and the zoom ratio Ra, i.e., fq / (TTL / Ra), is 1.03. Properly setting the focal length fq of the first lens L1 is beneficial for achieving strong zoom capability and high compactness in the optical lens 1.

[0540] In some embodiments, the ratio of the maximum travel distance delta of the second lens group G22 to the image height IH, delta / IH, is 0.76.

[0541] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the zoom ratio Ra is delta / Ra, which is 5.76.

[0542] In some embodiments, the relationship between the maximum focal length fmax, zoom ratio Ra, image height IH, and total optical length TTL of optical lens 1 is fmax*Ra*IH / TTL, i.e., the C value is 21.35. Optical lens 1 has good overall performance.

[0543] In some embodiments, the ratio fG1 / fmax of the total focal length fG1 of the first optical element G1 to the maximum focal length fmax of the optical lens 1 is 2.34.

[0544] In some embodiments, the ratio of the focal length fG21 of the first lens group G21 to the maximum focal length fmax of the optical lens 1, fG21 / fmax, is 0.30, and the ratio of the focal length fG22 of the second lens group G22 to the maximum focal length fmax of the optical lens 1, fG22 / fmax, is -0.32. The close absolute values ​​of the focal lengths fG21 and fG22 of the first and second lens groups are beneficial for improving image quality.

[0545] In some embodiments, when the optical lens 1 is at the telephoto end, the cascaded magnification of the first lens group G21 is -0.18, and the cascaded magnification of the second lens group G22 is 1.39. When the optical lens 1 is at the super telephoto end, the cascaded magnification of the first lens group G21 is -0.20, and the cascaded magnification of the second lens group G22 is 2.13.

[0546] Therefore, the ratio Mcc / Mc of the total cascaded magnification Mc of the second lens group G22 at the super telephoto end to the total cascaded magnification Mc of the second lens group G22 at the telephoto end is 1.53. The large cascaded magnification of the second lens group G22 is beneficial for optical lens 1 to have a larger zoom ratio.

[0547] Please refer to Figures 27a to 28b. Figure 27a is the astigmatism curve of the camera module 30 shown in Figure 25, Figure 27b is the distortion curve of the camera module 30 shown in Figure 25, Figure 28a is the astigmatism curve of the camera module 30 shown in Figure 26, and Figure 28b is the distortion curve of the camera module 30 shown in Figure 26.

[0548] The astigmatism plot is used to illustrate the deviation of the convergence point (image height) of the fine beam in different fields of view from the ideal imaging plane. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When the value of a certain field of view is too large, the image quality of that field of view is poor or there are advanced aberrations. In the astigmatism plot shown in Figure 27a, the field curvature in both directions is small, and the system has a good depth of focus. The distortion plot is used to characterize the relative deviation of the convergence point (actual image height) of the beam in different fields of view from the ideal image height. In the distortion plot shown in Figure 27b, the relative deviation is within 2.5%, which ensures that there is no obvious distortion in the image.

[0549] In the bokeh curve shown in Figure 28a, the field curvature in both directions is small, indicating that the system has good depth of focus. In the distortion curve shown in Figure 28b, the relative deviations are all within 2.5%, ensuring that there is no obvious distortion in the image.

[0550] Example 7

[0551] Please refer to Figures 29 and 30. Figure 29 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the telephoto end in Embodiment 7, and Figure 30 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the ultra-telephoto end in Embodiment 7.

[0552] In some embodiments, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3, with light passing sequentially through the optical lens 1 and the filter 3 to the photosensitive element 2 for imaging. The optical lens 1 includes a first optical element G1 and a second optical element G2, with the second optical element G2 located on the image side of the first optical element G1.

[0553] The first optical element G1 includes a front lens group G11, an optical path deflection element G12, and a rear lens group G13.

[0554] For example, the front lens group G11 may include a lens, namely the first lens L1. The optical path reversing element G12 may be a prism, which is used to change the optical axis from a first direction to a second direction. The rear lens group G13 may include a lens, namely the second lens L2.

[0555] For example, the first lens L1, the optical path refraction element G12, and the second lens L2 have different refractive indices. The first lens L1 and the second lens L2 can be fixedly connected to the optical path refraction element G12 by means of structural components.

[0556] For example, the first lens L1 has positive optical power, and the second lens L2 has negative optical power. The object-side surface of the first lens L1 is convex, and the image-side surface of the second lens L2 is concave.

[0557] The second optical element G2 includes a first lens group G21 and a second lens group G22. The second lens group G22 is located on the image side of the first lens group G21.

[0558] For example, the first lens group G21 may include three lenses, namely a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged sequentially from the object side to the image side. The first lens group G21 is a movable lens group, which can move along its optical axis.

[0559] For example, the second lens group G22 may include three lenses, namely a seventh lens L7, an eighth lens L8, and a ninth lens L9 arranged sequentially from the object side to the image side. The second lens group G22 is a movable lens group, capable of moving along its optical axis.

[0560] In this embodiment, the first lens L1, the optical path folding element G12, and the second lens L2 are relatively fixed, and the three can rotate together to achieve image stabilization of the optical lens 1. Therefore, through the cooperation of the first lens L1, the optical path folding element G12, and the second lens L2, the optical lens 1 has strong image stabilization capability, good image quality, and small size.

[0561] Furthermore, the first lens group G21 and the second lens group G22 achieve zooming and / or focusing of the optical lens 1 by moving. Due to the arrangement of the first optical element G1, the first lens group G21 and the second lens group G22 can easily have a large setting space and movement space, which is conducive to giving the optical lens 1 a strong zooming and / or focusing capability and improving the shooting capability of the optical lens 1.

[0562] In this embodiment, the photosensitive element 2 can be perpendicular to the optical axis of the second lens group G22, eliminating the need for additional elements to fold the optical path for the photosensitive element 2. This provides more space for other optical elements, thereby improving the compactness of the camera module 30 and facilitating its miniaturization.

[0563] In some embodiments, the second optical element G2 of the optical lens 1 may further include a third lens group G23 and a fourth lens group G24. The third lens group G23 is located between the first optical element G1 and the first lens group G21, and the fourth lens group G24 is located on the image side of the second lens group G22.

[0564] For example, the third lens group G23 and the fourth lens group G24 can each be fixed optical elements.

[0565] For example, the third lens group G23 may include a single lens, namely the third lens L3.

[0566] For example, the fourth lens group G24 may include a lens, namely the tenth lens L10.

[0567] In this embodiment, by setting the third lens group G23 and the fourth lens group G24, the optical lens 1 has more lenses or optical elements, which makes it easier to improve the imaging quality of the optical lens 1 by coordinating the optical power, refractive index and other parameters of multiple optical elements, and also makes the design of the optical lens 1 simpler.

[0568] In some embodiments, during the process of changing the optical lens 1 from the telephoto end to the super telephoto end, the position of the first optical element G1 remains fixed, while the first lens group G21 and the second lens group G22 both move along the second direction toward the first optical element G1. That is, the distance between the first lens group G21 and the first optical element G1 decreases, the distance between the second lens group G22 and the first optical element G1 decreases, the effective focal length of the optical lens 1 increases, and the magnification of the optical lens 1 increases. During zooming between the telephoto and super telephoto ends, and at other focal lengths between the telephoto and super telephoto ends, the position of the image plane of the optical lens 1 relative to the first optical element G1 remains unchanged, and the image height remains unchanged, ensuring full utilization of the photosensitive element 2 of the camera module 30 and achieving continuous lossless zoom.

[0569] Please refer to Tables 7a and 7b. Table 7a shows the radius of curvature R, airgap, refractive index, and Abbe number of each lens, light folding element, and filter in Embodiment 7 of the camera module 30 shown in Figure 1. The airgap includes the thickness of the structure itself and the spacing between structures; 1E+18 (scientific notation) refers to infinity. Table 7b shows the aspherical coefficients of each lens of the optical lens 1 of the camera module 30 shown in Figure 1 in Embodiment 7.

[0570] Wherein, "S1" represents the incident surface, "S2" represents the exit surface, "L" represents the lens, and "zoom (super telephoto)" represents the interval at the super telephoto end. Specifically, L1 is the first lens, L2 is the second lens, L3 is the third lens, L4 is the fourth lens, L5 is the fifth lens, L6 is the sixth lens, L7 is the seventh lens, L8 is the eighth lens, L9 is the ninth lens, and L10 is the tenth lens.

[0571] Table 7a

[0572] Table 7b

[0573] The aspherical surfaces in optical lens 11 in Tables 7a and 7b can be defined using, but are not limited to, the following aspherical curve equations:

[0574] Where z is a point on the aspherical surface at a distance r from the optical axis, and its relative distance to the tangent plane at the intersection point on the optical axis of the aspherical surface; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; k is the conic coefficient; αi is the i-th order aspherical coefficient, which can be found in Table 7b. Lenses L1, L2, L3, L4, L5, L6, L7, L8, L9, and L10 are all aspherical surfaces.

[0575] Please refer to Tables 7c and 7d. Table 7c shows the basic parameters of the camera module 30 shown in Figure 1 in Embodiment 7, and Table 7d shows the relationship between the parameters in Table 7c.

[0576] In Table 1c, fmax is the focal length of optical lens 1 at the super-telephoto end, fmin is the focal length of optical lens 1 at the telephoto end, fG1 is the focal length of the first optical element G1, fG21 is the focal length of the first lens group G21, fG22 is the focal length of the second lens group G22, fG23 is the focal length of the third lens group G23, fG24 is the focal length of the fourth lens group G24, Ra is the zoom ratio of optical lens 1, IH is the image height of optical lens 1, TTL is the total optical length of optical lens 1, delta is the maximum travel distance of the movable optical element with the largest displacement in optical lens 1, FOVmax is the maximum field of view of optical lens 1, FOVmin is the minimum field of view of optical lens 1, fq is the focal length of the first lens, and fc is the focal length of the second lens. The values ​​of fmax, fmin, fG1, fG21, fG22, fG23, fG24, fq, and fc are all valid values, and the unit is millimeters.

[0577] Table 7c

[0578] Table 7d

[0579] In some embodiments, the first optical element G1 satisfies: (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<0.26. Wherein, the sag at any point of the same aperture on the object-side surface of the first lens L1 and the image-side surface of the second lens L2 satisfies the above formula. In this case, by setting the relationship between the surface shape of the object-side surface of the first lens L1, the refractive index of the first lens L1, the surface shape of the image-side surface of the second lens L2, and the refractive index of the second lens L2, the second lens L2 is made more compatible with the first lens L1. During image stabilization, the first lens L1 and the second lens L2 can achieve dynamic aberration compensation, thereby reducing aberrations in the optical lens 1 during image stabilization and achieving better image stabilization performance.

[0580] In some embodiments, the ratio of the focal length fq of the first lens L1 to the focal length fc of the second lens L2, fq / fc, is -0.98.

[0581] In some embodiments, the ratio of the focal length fq of the first lens L1 to the maximum focal length fmax of the optical lens 1, fq / fmax, is 0.65.

[0582] In some embodiments, the ratio of the focal length fc of the second lens L2 to the maximum focal length fmax of the optical lens 1, fc / fmax, is -0.66. The absolute values ​​of the focal length fq of the first lens L1 and the focal length fc of the second lens L2 are relatively close, and the value is smaller than the maximum focal length fmax of the optical lens 1. This is beneficial to improving the image stabilization capability and image quality of the optical lens 1, and also to improving the compactness of the optical lens 1.

[0583] In some embodiments, the maximum travel distance of the second lens group G22 is greater than that of the first lens group G21, and the ratio of the maximum travel distance delta of the second lens group G22 to the total optical length TTL, delta / TTL, is 0.25. This is beneficial for ensuring that the second lens group G22 has suitable sensitivity, making it easier to manufacture and zoom.

[0584] In some embodiments, the ratio of the total optical length (TTL) to the zoom ratio (Ra) (TTL / Ra) is 23.54. In this case, the optical lens 1 has strong zoom capability and high compactness.

[0585] In some embodiments, the relationship between the focal length fq of the first lens L1, the total optical length TTL, and the zoom ratio Ra, i.e., fq / (TTL / Ra), is 1.07. Properly setting the focal length fq of the first lens L1 is beneficial for achieving strong zoom capability and high compactness in the optical lens 1.

[0586] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the image height IH, delta / IH, is 0.77.

[0587] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the zoom ratio Ra is delta / Ra, which is 5.91.

[0588] In some embodiments, the relationship between the maximum focal length fmax, zoom ratio Ra, image height IH, and total optical length TTL of optical lens 1 is fmax*Ra*IH / TTL, i.e., the C value is 20.71. Optical lens 1 has good overall performance.

[0589] In some embodiments, the ratio fG1 / fmax of the total focal length fG1 of the first optical element G1 to the maximum focal length fmax of the optical lens 1 is 2.43.

[0590] In some embodiments, the ratio of the focal length fG21 of the first lens group G21 to the maximum focal length fmax of the optical lens 1, fG21 / fmax, is 0.3, and the ratio of the focal length fG22 of the second lens group G22 to the maximum focal length fmax of the optical lens 1, fG22 / fmax, is -0.34. The close absolute values ​​of the focal lengths fG21 and fG22 of the first and second lens groups are beneficial for improving image quality.

[0591] In some embodiments, when the optical lens 1 is at the telephoto end, the cascaded magnification of the first lens group G21 is -0.2, and the cascaded magnification of the second lens group G22 is 1.35. When the optical lens 1 is at the super telephoto end, the cascaded magnification of the first lens group G21 is -0.23, and the cascaded magnification of the second lens group G22 is 2.07.

[0592] Therefore, the ratio Mcc / Mc of the total cascaded magnification Mc of the second lens group G22 at the super telephoto end to the total cascaded magnification Mc of the second lens group G22 at the telephoto end is 1.53. The large cascaded magnification of the second lens group G22 is beneficial for optical lens 1 to have a larger zoom ratio.

[0593] Please refer to Figures 31a and 32b. Figure 31a is the astigmatism curve of the camera module 30 shown in Figure 29, Figure 31b is the distortion curve of the camera module 30 shown in Figure 29, Figure 32a is the astigmatism curve of the camera module 30 shown in Figure 30, and Figure 32b is the distortion curve of the camera module 30 shown in Figure 30.

[0594] The astigmatism plot is used to illustrate the deviation of the convergence point (image height) of the fine beam in different fields of view from the ideal imaging plane. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When the value of a certain field of view is too large, the image quality of that field of view is poor or there are high-order aberrations. In the astigmatism plot shown in Figure 31a, the field curvature in both directions is small, and the system has a good depth of focus. The distortion plot is used to characterize the relative deviation of the convergence point (actual image height) of the beam in different fields of view from the ideal image height. In the distortion plot shown in Figure 31b, the relative deviation is within 2.5%, which ensures that there is no obvious distortion in the image.

[0595] In the bokeh curve shown in Figure 32a, the field curvature in both directions is small, indicating that the system has good depth of focus. In the distortion curve shown in Figure 32b, the relative deviations are all within 2%, ensuring that there is no obvious distortion in the image.

[0596] Example 8:

[0597] Please refer to Figures 33 and 34. Figure 33 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the telephoto end in Embodiment 8, and Figure 34 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the ultra-telephoto end in Embodiment 8.

[0598] In some embodiments, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3, with light passing sequentially through the optical lens 1 and the filter 3 to the photosensitive element 2 for imaging. The optical lens 1 includes a first optical element G1 and a second optical element G2, with the second optical element G2 located on the image side of the first optical element G1.

[0599] The first optical element G1 includes a front lens group G11, an optical path deflection element G12, and a rear lens group G13.

[0600] For example, the front lens group G11 may include two lenses, namely a first lens L1 and a second lens L2. The optical path reversing element G12 may be a prism, which is used to change the optical axis from a first direction to a second direction. The rear lens group G13 may include two lenses, namely a third lens L3 and a fourth lens L4.

[0601] For example, the first lens L1, the second lens L2, the optical path reversing element G12, the third lens L3, and the fourth lens L4 have different refractive indices. The first lens L1, the second lens L2, the third lens L3, and the fourth lens L4 can be fixedly connected to the optical path reversing element G12 by means of structural components.

[0602] For example, the first lens L1 has positive optical power, and the fourth lens L4 has negative optical power. The object-side surface of the first lens L1 is convex, and the image-side surface of the fourth lens L4 is concave.

[0603] The second optical element G2 includes a first lens group G21 and a second lens group G22. The second lens group G22 is located on the image side of the first lens group G21.

[0604] For example, the first lens group G21 may include three lenses, namely the sixth lens L6, the seventh lens L7, and the eighth lens L8 arranged sequentially from the object side to the image side. The first lens group G21 is a movable lens group, which can move along its optical axis.

[0605] For example, the second lens group G22 may include three lenses, namely the ninth lens L9, the tenth lens L10, and the eleventh lens L11 arranged sequentially from the object side to the image side. The second lens group G22 is a movable lens group, which can move along its optical axis.

[0606] In this embodiment, the first lens L1, the second lens L2, the optical path folding element G12, the third lens L3, and the fourth lens L4 are relatively fixed, and the three can rotate together to achieve image stabilization of the optical lens 1. Therefore, by setting the first optical element G1, the optical lens 1 has strong image stabilization capability, good image quality, and small size.

[0607] Furthermore, the first lens group G21 and the second lens group G22 achieve zooming and / or focusing of the optical lens 1 by moving. Due to the arrangement of the first optical element G1, the first lens group G21 and the second lens group G22 can easily have a large setting space and movement space, which is conducive to giving the optical lens 1 a strong zooming and / or focusing capability and improving the shooting capability of the optical lens 1.

[0608] In this embodiment, the photosensitive element 2 can be perpendicular to the optical axis of the second lens group G22, eliminating the need for additional elements to fold the optical path for the photosensitive element 2. This provides more space for other optical elements, thereby improving the compactness of the camera module 30 and facilitating its miniaturization.

[0609] In some embodiments, the second optical element G2 of the optical lens 1 may further include a third lens group G23 and a fourth lens group G24. The third lens group G23 is located between the first optical element G1 and the first lens group G21, and the fourth lens group G24 is located on the image side of the second lens group G22.

[0610] For example, the third lens group G23 is a fixed lens group. The fourth lens group G24 can be a movable lens group.

[0611] For example, the third lens group G23 includes a single lens, namely the fifth lens L5.

[0612] For example, the fourth lens group G24 includes a lens, namely the twelfth lens L12.

[0613] In this embodiment, by setting the third lens group G23 and the fourth lens group G24, the optical lens 1 has more lenses or optical elements, which makes it easier to improve the imaging quality of the optical lens 1 by coordinating the optical power, refractive index and other parameters of multiple optical elements, and also makes the design of the optical lens 1 simpler.

[0614] In some embodiments, during the process of changing the optical lens 1 from the telephoto end to the super telephoto end, the position of the first optical element G1 remains fixed, while the first lens group G21, the second lens group G22, and the fourth lens group G24 all move along the second direction toward the first optical element G1. That is, the distance between the first lens group G21 and the first optical element G1 decreases, the distance between the second lens group G22 and the first optical element G1 decreases, and the distance between the third lens group G23 and the first optical element G1 decreases, thereby increasing the effective focal length and magnification of the optical lens 1. During zooming between the telephoto and super telephoto ends, and at other focal lengths between the telephoto and super telephoto ends, the position of the image plane of the optical lens 1 relative to the first optical element G1 remains unchanged, and the image height remains constant, ensuring full utilization of the photosensitive element 2 of the camera module 30 and achieving continuous lossless zoom.

[0615] Please refer to Tables 8a and 8b. Table 8a shows the radius of curvature R, airgap, refractive index, and Abbe number of each lens, light folding element, and filter in Embodiment 8 of the camera module 30 shown in Figure 1. The airgap includes the thickness of the structure itself and the spacing between structures; 1E+18 (scientific notation) refers to infinity. Table 8b shows the aspherical coefficients of each lens of the optical lens 1 of the camera module 30 shown in Figure 1 in Embodiment 8.

[0616] Wherein, "S1" represents the incident surface, "S2" represents the exit surface, "L" represents the lens, and "zoom (super telephoto)" indicates the interval at the super telephoto end. Specifically, L1 is the first lens, L2 is the second lens, L3 is the third lens, L4 is the fourth lens, L5 is the fifth lens, L6 is the sixth lens, L7 is the seventh lens, L8 is the eighth lens, L9 is the ninth lens, L10 is the tenth lens, L11 is the eleventh lens, and L12 is the twelfth lens.

[0617] Table 8a

[0618] Table 8b

[0619] The aspherical surfaces in optical lens 11 in Tables 8a and 8b can be defined using, but are not limited to, the following aspherical curve equations:

[0620] Where z is a point on the aspherical surface at a distance r from the optical axis, and its relative distance to the tangent plane at the intersection point on the optical axis of the aspherical surface; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; k is the conic coefficient; αi is the i-th order aspherical coefficient, which can be found in Table 8b. Lenses L1, L2, L3, L4, L5, L6, L7, L8, L9, L10, L11 (eleventh lens), and L12 (twelfth lens) are all aspherical.

[0621] Please refer to Tables 8c and 8d. Table 8c shows the basic parameters of the camera module 30 shown in Figure 1 in Embodiment 8, and Table 8d shows the relationship between the parameters in Table 8c.

[0622] In Table 8c, fmax is the focal length of optical lens 1 at the super-telephoto end, fmin is the focal length of optical lens 1 at the telephoto end, fG1 is the focal length of the first optical element G1, fG21 is the focal length of the first lens group G21, fG22 is the focal length of the second lens group G22, fG23 is the focal length of the third lens group G23, fG24 is the focal length of the fourth lens group G24, Ra is the zoom ratio of optical lens 1, IH is the image height of optical lens 1, TTL is the total optical length of optical lens 1, delta is the maximum travel distance of the movable optical element with the largest displacement in optical lens 1, FOVmax is the maximum field of view of optical lens 1, FOVmin is the minimum field of view of optical lens 1, fq is the focal length of the first lens, and fc is the focal length of the second lens. The values ​​of fmax, fmin, fG1, fG21, fG22, fG23, fG24, fq, and fc are all valid values, and the unit is millimeters.

[0623] Table 8c

[0624] Table 8d

[0625] In some embodiments, the first optical element G1 satisfies: (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<0.1. Wherein, the sag at any point of the same aperture on the object-side surface of the first lens L1 and the image-side surface of the second lens L2 satisfies the above formula. In this case, by setting the relationship between the surface shape of the object-side surface of the first lens L1, the refractive index of the first lens L1, the surface shape of the image-side surface of the second lens L2, and the refractive index of the second lens L2, the second lens L2 is made more compatible with the first lens L1. During image stabilization, the first lens L1 and the second lens L2 can achieve dynamic aberration compensation, thereby reducing aberrations in the optical lens 1 during image stabilization and achieving better image stabilization performance.

[0626] In some embodiments, the ratio of the focal length fq of the first lens L1 to the focal length fc of the second lens L2, fq / fc, is -1.26.

[0627] In some embodiments, the ratio of the focal length fq of the first lens L1 to the maximum focal length fmax of the optical lens 1, fq / fmax, is 0.63.

[0628] In some embodiments, the ratio of the focal length fc of the second lens L2 to the maximum focal length fmax of the optical lens 1, fc / fmax, is -0.50. The absolute values ​​of the focal length fq of the first lens L1 and the focal length fc of the second lens L2 are relatively close, and the value is relatively small compared to the maximum focal length fmax of the optical lens 1. This is beneficial to improving the image stabilization capability and image quality of the optical lens 1, and also to improving the compactness of the optical lens 1.

[0629] In some embodiments, the maximum travel distance of the second lens group G22 is greater than that of the first lens group G21 and the fourth lens group G24, and the ratio of the maximum travel distance delta of the second lens group G22 to the total optical length TTL, delta / TTL, is 0.24. This is beneficial for ensuring that the second lens group G22 has suitable sensitivity, making it easy to manufacture and zoom.

[0630] In some embodiments, the ratio of the total optical length (TTL) to the zoom ratio (Ra) (TTL / Ra) is 24.18. In this case, the optical lens 1 has strong zoom capability and high compactness.

[0631] In some embodiments, the relationship between the focal length fq of the first lens L1, the total optical length TTL, and the zoom ratio Ra, i.e., fq / (TTL / Ra), is 1.04. Properly setting the focal length fq of the first lens L1 is beneficial for achieving strong zoom capability and high compactness in the optical lens 1.

[0632] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the image height IH, delta / IH, is 0.77.

[0633] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the zoom ratio Ra is 5.74.

[0634] In some embodiments, the relationship between the maximum focal length fmax, zoom ratio Ra, image height IH, and total optical length TTL of optical lens 1 is fmax*Ra*IH / TTL, i.e., the C value is 20.78. Optical lens 1 has good overall performance.

[0635] In some embodiments, the ratio fG1 / fmax of the total focal length fG1 of the first optical element G1 to the maximum focal length fmax of the optical lens 1 is 8.73.

[0636] In some embodiments, the ratio of the focal length fG21 of the first lens group G21 to the maximum focal length fmax of the optical lens 1, fG21 / fmax, is 0.30, and the ratio of the focal length fG22 of the second lens group G22 to the maximum focal length fmax of the optical lens 1, fG22 / fmax, is -0.30. The close absolute values ​​of the focal lengths fG21 and fG22 of the first and second lens groups are beneficial for improving image quality.

[0637] In some embodiments, when the optical lens 1 is at the telephoto end, the cascaded magnification of the first lens group G21 is -0.19, and the cascaded magnification of the second lens group G22 is 1.46. When the optical lens 1 is at the super telephoto end, the cascaded magnification of the first lens group G21 is -0.21, and the cascaded magnification of the second lens group G22 is 2.29.

[0638] Therefore, the ratio Mcc / Mc of the total cascaded magnification Mc of the second lens group G22 at the super telephoto end to the total cascaded magnification Mc of the second lens group G22 at the telephoto end is 1.57. The large cascaded magnification of the second lens group G22 is beneficial for optical lens 1 to have a larger zoom ratio.

[0639] Please refer to Figures 35a to 36b. Figure 35a is the astigmatism curve of the camera module 30 shown in Figure 33, Figure 35b is the distortion curve of the camera module 30 shown in Figure 33, Figure 36a is the astigmatism curve of the camera module 30 shown in Figure 34, and Figure 36b is the distortion curve of the camera module 30 shown in Figure 34.

[0640] The astigmatism plot is used to illustrate the deviation of the convergence point (image height) of the fine beam in different fields of view from the ideal imaging plane. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When the value of a certain field of view is too large, the image quality of that field of view is poor or there are high-order aberrations. In the astigmatism plot shown in Figure 35a, the field curvature in both directions is small, and the system has good depth of focus. The distortion plot is used to characterize the relative deviation of the convergence point (actual image height) of the beam in different fields of view from the ideal image height. In the distortion plot shown in Figure 35b, the relative deviation is within 2%, which ensures that there is no obvious distortion in the image.

[0641] In the bokeh curve shown in Figure 36a, the field curvature in both directions is small, indicating that the system has good depth of focus. In the distortion curve shown in Figure 36b, the relative deviations are all within 2.5%, ensuring that there is no obvious distortion in the image.

[0642] Example 9:

[0643] Please refer to Figures 37 and 38. Figure 37 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the telephoto end in Embodiment 9, and Figure 38 is a structural schematic diagram of the camera module 30 shown in Figure 1 at the ultra-telephoto end in Embodiment 9.

[0644] In some embodiments, the camera module 30 may include an optical lens 1, a photosensitive element 2, and a filter 3, with light passing sequentially through the optical lens 1 and the filter 3 to the photosensitive element 2 for imaging. The optical lens 1 includes a first optical element G1 and a second optical element G2, with the second optical element G2 located on the image side of the first optical element G1.

[0645] The first optical element G1 includes a front lens group G11, an optical path deflection element G12, and a rear lens group G13.

[0646] For example, the front lens group G11 may include a lens, namely the first lens L1. The optical path reversing element G12 may be a prism, which is used to change the optical axis from a first direction to a second direction. The rear lens group G13 may include a lens, namely the second lens L2.

[0647] For example, the first lens L1, the optical path refraction element G12, and the second lens L2 have different refractive indices. Therefore, the first lens L1 and the second lens L2 can be fixedly connected to the optical path refraction element G12 by adhesive bonding or by structural fixing.

[0648] For example, the first lens L1 has positive optical power, and the second lens L2 has negative optical power. The object-side surface of the first lens L1 is convex, and the image-side surface of the second lens L2 is concave.

[0649] The second optical element G2 includes a first lens group G21 and a second lens group G22. The second lens group G22 is located on the image side of the first lens group G21.

[0650] For example, the first lens group G21 may include four lenses, namely the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 arranged sequentially from the object side to the image side. The first lens group G21 is a movable lens group, which can move along its optical axis.

[0651] For example, the second lens group G22 may include three lenses, namely the eighth lens L8, the ninth lens L9, and the tenth lens L10 arranged sequentially from the object side to the image side. The second lens group G22 is a movable lens group, which can move along its optical axis.

[0652] In this embodiment, the first lens L1, the optical path folding element G12, and the second lens L2 are relatively fixed, and the three can rotate together to achieve image stabilization of the optical lens 1. Therefore, through the cooperation of the first lens L1, the optical path folding element G12, and the second lens L2, the optical lens 1 has strong image stabilization capability, good image quality, and small size.

[0653] Furthermore, the first lens group G21 and the second lens group G22 achieve zooming and / or focusing of the optical lens 1 by moving. Due to the arrangement of the first optical element G1, the first lens group G21 and the second lens group G22 can easily have a large setting space and movement space, which is conducive to giving the optical lens 1 a strong zooming and / or focusing capability and improving the shooting capability of the optical lens 1.

[0654] In the camera module 30, the photosensitive element 2 can be perpendicular to the optical axis of the second lens group G22. There is no need to set up additional components to fold the optical path for the photosensitive element 2, which is beneficial to provide more space for other optical components, thereby improving the compactness of the camera module 30 and facilitating the miniaturization of the camera module 30.

[0655] In some embodiments, the second optical element G2 of the optical lens 1 may further include a third lens group G23. The third lens group G23 is located between the first optical element G1 and the first lens group G21.

[0656] For example, the third lens group G23 can be a fixed optical element.

[0657] For example, the third lens group G23 may include a single lens, namely the third lens L3.

[0658] In this embodiment, by setting the third lens group G23, the optical lens 1 has more lenses or optical elements, which makes it easier to improve the imaging quality of the optical lens 1 by coordinating the optical power, refractive index and other parameters of multiple optical elements, and also makes the design of the optical lens 1 simpler.

[0659] In some embodiments, during the process of changing the optical lens 1 from the telephoto end to the super telephoto end, the position of the first optical element G1 remains fixed, while the first lens group G21 and the second lens group G22 both move along the second direction toward the first optical element G1. That is, the distance between the first lens group G21 and the first optical element G1 decreases, the distance between the second lens group G22 and the first optical element G1 decreases, the effective focal length of the optical lens 1 increases, and the magnification of the optical lens 1 increases. During zooming between the telephoto and super telephoto ends, and at other focal lengths between the telephoto and super telephoto ends, the position of the image plane of the optical lens 1 relative to the first optical element G1 remains unchanged, and the image height remains unchanged, ensuring full utilization of the photosensitive element 2 of the camera module 30 and achieving continuous lossless zoom.

[0660] Please refer to Tables 9a and 9b. Table 9a shows the radius of curvature R, airgap, refractive index, and Abbe number of each lens, light folding element, and filter in Embodiment 9 of the camera module 30 shown in Figure 1. The airgap includes the thickness of the structure itself and the spacing between structures; 1E+18 (scientific notation) refers to infinity. Table 9b shows the aspherical coefficients of each lens of the optical lens 1 of the camera module 30 shown in Figure 1 in Embodiment 9.

[0661] Wherein, "S1" represents the incident surface, "S2" represents the exit surface, "L" represents the lens, and "zoom (super telephoto)" represents the interval at the super telephoto end. Specifically, L1 is the first lens, L2 is the second lens, L3 is the third lens, L4 is the fourth lens, L5 is the fifth lens, L6 is the sixth lens, L7 is the seventh lens, L8 is the eighth lens, L9 is the ninth lens, and L10 is the tenth lens.

[0662] Table 9a

[0663] Table 9b

[0664] The aspherical surfaces in optical lens 11 in Tables 9a and 9b can be defined using, but are not limited to, the following aspherical curve equations:

[0665] Where z is a point on the aspherical surface at a distance r from the optical axis, and its relative distance to the tangent plane at the intersection point on the optical axis of the aspherical surface; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; k is the conic coefficient; αi is the i-th order aspherical coefficient, which can be found in Table 9b. Lenses L1, L2, L3, L4, L5, L6, L7, L8, L9, and L10 are all aspherical surfaces.

[0666] Please refer to Tables 9c and 9d. Table 9c shows the basic parameters of the camera module 30 shown in Figure 1 in Embodiment Nine, and Table 9d shows the relationship between the parameters in Table 9c.

[0667] In Table 9c, fmax is the focal length of optical lens 1 at the super-telephoto end, fmin is the focal length of optical lens 1 at the telephoto end, fG1 is the focal length of the first optical element G1, fG21 is the focal length of the first lens group G21, fG22 is the focal length of the second lens group G22, fG23 is the focal length of the third lens group G23, Ra is the zoom ratio of optical lens 1, IH is the image height of optical lens 1, TTL is the total optical length of optical lens 1, delta is the maximum travel distance of the movable optical element with the largest displacement in optical lens 1, FOVmax is the maximum field of view of optical lens 1, FOVmin is the minimum field of view of optical lens 1, fq is the focal length of the first lens, and fc is the focal length of the second lens. The values ​​of fmax, fmin, fG1, fG21, fG22, fG23, fq, and fc are all valid values, in millimeters.

[0668] Table 9c

[0669] Table 9d

[0670] In some embodiments, for example, the first optical element G1 satisfies: (||sag1*(N1-1)|-|sag2*(N2-1)||) / ((|sag1*(N1-1)|+|sag2*(N2-1)|) / 2)<0.12. Wherein, the sag at any point of the same aperture on the object-side surface of the first lens L1 and the image-side surface of the second lens L2 satisfies the above formula. In this case, by setting the relationship between the surface shape of the object-side surface of the first lens L1, the refractive index of the first lens L1, the surface shape of the image-side surface of the second lens L2, and the refractive index of the second lens L2, the second lens L2 is made more compatible with the first lens L1. During image stabilization, the first lens L1 and the second lens L2 can achieve dynamic aberration compensation, thereby reducing aberrations in the optical lens 1 during image stabilization and achieving better image stabilization performance.

[0671] In some embodiments, the ratio of the focal length fq of the first lens L1 to the focal length fc of the second lens L2, fq / fc, is -0.97.

[0672] In some embodiments, the ratio of the focal length fq of the first lens L1 to the maximum focal length fmax of the optical lens 1, fq / fmax, is 0.5.

[0673] In some embodiments, the ratio of the focal length fc of the second lens L2 to the maximum focal length fmax of the optical lens 1, fc / fmax, is -0.51. The absolute values ​​of the focal length fq of the first lens L1 and the focal length fc of the second lens L2 are relatively close, and the value is relatively small compared to the maximum focal length fmax of the optical lens 1. This is beneficial to improving the image stabilization capability and image quality of the optical lens 1, and also to improving the compactness of the optical lens 1.

[0674] In some embodiments, the maximum travel distance of the second lens group G22 is greater than that of the first lens group G21, and the ratio of the maximum travel distance delta of the second lens group G22 to the total optical length TTL, delta / TTL, is 0.24. This is beneficial for ensuring that the second lens group G22 has suitable sensitivity, making it easier to manufacture and zoom.

[0675] In some embodiments, the ratio of the total optical length TTL to the zoom ratio Ra, TTL / Ra, is 20.11. In this case, the optical lens 1 has strong zoom capability and high compactness.

[0676] In some embodiments, the relationship between the focal length fq of the first lens L1, the total optical length TTL, and the zoom ratio Ra, i.e., fq / (TTL / Ra), is 1.37. Properly setting the focal length fq of the first lens L1 is beneficial for achieving strong zoom capability and high compactness in the optical lens 1.

[0677] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the image height IH, delta / IH, is 0.88.

[0678] In some embodiments, the ratio of the maximum travel delta of the second lens group G22 to the zoom ratio Ra is delta / Ra, which is 4.77.

[0679] In some embodiments, the relationship between the maximum focal length fmax, zoom ratio Ra, image height IH, and total optical length TTL of optical lens 1 is fmax*Ra*IH / TTL, i.e., the C value is 34.5. Optical lens 1 has good overall performance.

[0680] In some embodiments, the ratio fG1 / fmax of the total focal length fG1 of the first optical element G1 to the maximum focal length fmax of the optical lens 1 is 2.02.

[0681] In some embodiments, the ratio of the focal length fG21 of the first lens group G21 to the maximum focal length fmax of the optical lens 1, fG21 / fmax, is 0.22, and the ratio of the focal length fG22 of the second lens group G22 to the maximum focal length fmax of the optical lens 1, fG22 / fmax, is -0.35. The close absolute values ​​of the focal lengths fG21 and fG22 of the first and second lens groups are beneficial for improving image quality.

[0682] In some embodiments, when the optical lens 1 is at the telephoto end, the cascaded magnification of the first lens group G21 is -0.4, and the cascaded magnification of the second lens group G22 is 1.38. When the optical lens 1 is at the super telephoto end, the cascaded magnification of the first lens group G21 is -0.57, and the cascaded magnification of the second lens group G22 is 1.95.

[0683] Therefore, the ratio Mcc / Mc of the total cascaded magnification Mc of the second lens group G22 at the super telephoto end to the total cascaded magnification Mc of the second lens group G22 at the telephoto end is 1.41. The large cascaded magnification of the second lens group G22 is beneficial for optical lens 1 to have a larger zoom ratio.

[0684] Please refer to Figures 39a to 40b. Figure 39a is the astigmatism curve of the camera module 30 shown in Figure 37, Figure 39b is the distortion curve of the camera module 30 shown in Figure 37, Figure 40a is the astigmatism curve of the camera module 30 shown in Figure 38, and Figure 40b is the distortion curve of the camera module 30 shown in Figure 38.

[0685] The astigmatism plot is used to illustrate the deviation of the convergence point (image height) of the fine beam in different fields of view from the ideal imaging plane. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When the value of a certain field of view is too large, the image quality of that field of view is poor or there are high-order aberrations. In the astigmatism plot shown in Figure 39a, the field curvature in both directions is small, and the system has a good depth of focus. The distortion plot is used to characterize the relative deviation of the convergence point (actual image height) of the beam in different fields of view from the ideal image height. In the distortion plot shown in Figure 39b, the relative deviation is within 0.5%, which ensures that there is no obvious distortion in the image.

[0686] In the bokeh curve shown in Figure 40a, the field curvature in both directions is small, indicating that the system has good depth of focus. In the distortion curve shown in Figure 40b, the relative deviations are all within 2%, ensuring that there is no obvious distortion in the image.

[0687] 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 protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0688] It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0689] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An optical lens, characterized in that, Comprising a first optical element and a second optical element; The first optical element includes a front lens group, an optical path folding element, and a rear lens group arranged from the object side to the image side. The optical path folding element is used to change the optical axis from the first direction to the second direction. The front lens group has a positive optical power, and the rear lens group has a negative optical power; The second optical element is located on the image side of the first optical element. The second optical element includes at least two lens groups. During the zooming process of the optical lens, at least two of the lens groups move along the second direction; During the anti-shake process of the optical lens, the first optical element rotates around the first direction, and / or rotates around the second direction, and / or rotates around the third direction. The third direction is different from both the first direction and the second direction; Wherein, the first optical element satisfies: ||sag1*(N1 - 1)| - |sag2*(N2 - 1)|| / ((|sag1*(N1 - 1)| + |sag2*(N2 - 1)|) / 2) < 1; wherein, sag1 is the sagitta of the object side surface of the front lens group at the first aperture, sag2 is the sagitta of the image side surface of the rear lens group at the second aperture, N1 is the refractive index of the lens where the object side surface of the front lens group is located, and N2 is the refractive index of the lens where the image side surface of the rear lens group is located; wherein, the first aperture is equal to the second aperture.

2. The optical lens according to claim 1, characterized in that, The second aperture is the aperture at any point on the image side surface of the rear lens group.

3. The optical lens according to claim 1 or 2, characterized in that, The first optical element satisfies: ||sag1*(N1 - 1)| - |sag2*(N2 - 1)|| / ((|sag1*(N1 - 1)| + |sag2*(N2 - 1)|) / 2) < 0.

4.

4. The optical lens according to any one of claims 1 to 3, characterized in that, The relationship between the focal length fq of the front lens group and the focal length fc of the rear lens group satisfies: -2 < fq / fc < -0.5, or, -1.2 < fq / fc < -0.

8.

5. The optical lens according to any one of claims 1 to 4, characterized in that, The relationship between the focal length fq of the front lens group and the maximum focal length fmax of the optical lens satisfies: 0.2 < fq / fmax < 0.8, or, 0.4 < fq / fmax < 0.

65.

6. The optical lens according to any one of claims 1 to 5, characterized in that, The relationship between the focal length fc of the rear lens group and the maximum focal length fmax of the optical lens satisfies: -0.8 < fc / fmax < -0.2, or, -0.7 < fc / fmax < -0.

45.

7. The optical lens according to any one of claims 1 to 6, characterized in that, The relationship between the total focal length fG1 of the first optical element and the maximum focal length fmax of the optical lens satisfies: fG1 / fmax < 10, or, 1 < fG1 / fmax < 9.

8. The optical lens according to any one of claims 1 to 7, characterized in that, The relationship between the focal length fq of the front lens group, the overall optical length TTL of the optical lens, and the zoom ratio Ra of the optical lens satisfies: 0.4 < fq / (TTL / Ra), or, 0.8 < fq / (TTL / Ra).

9. The optical lens according to any one of claims 1 to 8, characterized in that, The relationship between the maximum focal length fmax of the optical lens, the zoom ratio Ra of the optical lens, the image height IH of the optical lens, and the overall optical length TTL of the optical lens satisfies: 7.5 < fmax*Ra*IH / TTL < 50, or, 15 < fmax*Ra*IH / TTL < 35.

10. The optical lens according to any one of claims 1 to 9, characterized in that, The overall optical length TTL of the optical lens satisfies: 15 mm < TTL < 70 mm.

11. The optical lens according to any one of claims 1 to 10, characterized in that, The maximum moving stroke delta of the movable lens group with the largest displacement in the second optical element and the zoom ratio Ra of the optical lens satisfy: 3.9 < delta / Ra < 8, or, 4 < delta / Ra < 7.

12. The optical lens according to any one of claims 1 to 11, characterized in that, The maximum moving stroke delta of the movable lens group with the largest displacement in the second optical element and the overall optical length TTL of the optical lens satisfy: 0.5 > delta / TTL > 0.15; or, 0.35 > delta / TTL > 0.

2.

13. The optical lens according to any one of claims 1 to 12, characterized in that, The maximum moving stroke delta of the movable lens group with the largest displacement in the second optical element and the image height IH of the optical lens satisfy: 4 > delta / IH > 0.4, or, 1.5 > delta / IH > 0.

5.

14. The optical lens according to any one of claims 1 to 13, characterized in that, The optical lens satisfies: 1.2 < Mcc / Mc < 1.8, or, 1.3 < Mcc / Mc < 1.7; where Mcc is the total cascaded magnification of all movable lenses on the image side of the first movable lens group at the ultra-long focal end, and Mc is the total cascaded magnification of all movable lenses on the image side of the first movable lens group at the long focal end.

15. The optical lens according to any one of claims 1 to 14, characterized in that, The second optical element includes a first lens group and a second lens group arranged from the object side to the image side. The first lens group has a positive optical power, and the second lens group has a negative optical power.

16. The optical lens according to claim 15, characterized in that, The focal length fG21 of the first lens group and the maximum focal length fmax of the optical lens satisfy: 0.2 < fG21 / fmax < 0.

35.

17. The optical lens according to claim 15, characterized in that, The focal length fG22 of the second lens group and the maximum focal length fmax of the optical lens satisfy: -0.35 < fG22 / fmax < -0.

2.

18. The optical lens according to any one of claims 15 to 17, characterized in that, The second optical element further includes a third lens group and a fourth lens group. The third lens group is located between the first optical element and the first lens group, and the fourth lens group is located on the image side of the second lens group.

19. The optical lens according to any one of claims 1 to 18, characterized in that, ​ 20. A camera module, characterized in that, ​ 21. An electronic device, characterized in that, ​

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