Optical lens, camera module and electronic equipment

Abstract

The invention relates to the field of optical lenses, in particular to an optical lens, a camera module and electronic equipment. The optical lens comprises a first lens group, a first turning element and a movable lens group which are sequentially arranged in the direction from the object side to the image side. The first turning element is used for changing the propagation direction of an optical axis from the optical axis of the first lens group to the optical axis direction of the movable lens group. The first lens group comprises a surface type variable lens, and in the zooming process of the optical lens, the first lens group can change the focal length; the rear lens group can move along the optical axis, and the movable lens group moves along the optical axis in the zooming process of the optical lens. Through the variable focal length of the first lens group and the cooperation of the movable lens group, the optical lens can be continuously and losslessly zoomed between the long focal length end and the short focal length end, so that the optical lens has higher imaging quality under different focal lengths; the first turning element is arranged, so that the propagation direction of the light beam is changed, and miniaturization design of the optical lens is facilitated.

Description

Technical Field

[0001] This application relates to the field of optical lenses, and more particularly to an optical lens, a camera module, and an electronic device. Background Technology

[0002] Zoom is a very important part of the user's photography experience. As telephoto photography on smartphones becomes more and more common, consumers have higher and higher requirements for zoom.

[0003] Current technical solutions include adding one or more fixed-focus optical lenses to achieve zoom effects, or moving one or more groups of lenses to achieve continuous changes in focal length. However, these solutions all occupy a significant amount of internal space in the device, which is detrimental to the slim and lightweight design of small electronic devices such as mobile phones, and also greatly increases implementation costs. Summary of the Invention

[0004] The purpose of this application is to provide an optical lens, a camera module, and an electronic device.

[0005] In a first aspect, embodiments of this application provide an optical lens, including a first lens group, a first transition element, and a movable lens group arranged sequentially along the object side to the image side. The first transition element is used to change the propagation direction of the optical axis from the optical axis of the first lens group to the optical axis direction of the movable lens group, wherein the optical axis directions of the first lens group and the movable lens group are different. The first lens group includes a variable-format lens, and during zooming, the variable-format lens changes its surface shape to change the focal length of the first lens group. The movable lens group is movable along the optical axis, and during zooming, the movable lens group moves along the optical axis of the movable lens group.

[0006] The first lens group may include at least one surface-type variable lens.

[0007] The first deflection element is used to change the propagation direction of the light beam. For example, the first deflection element can be a prism, a reflector, etc.

[0008] In this context, a movable lens group refers to a lens group whose position along the optical axis can be changed to achieve zooming or focusing. Essentially, the movable lens group can be moved to a set position and held relatively fixed. This movement can be achieved by a drive mechanism such as a voice coil motor.

[0009] A variable-shape lens can refer to a lens whose focal length can be changed by altering its surface shape, thereby changing its curvature. For example, a variable-shape lens can change its focal length by changing the shape of its object-side surface and / or image-side surface. When the focal length of the variable-shape lens changes, the focal length of the first lens group changes accordingly.

[0010] The short focal length can be the wide-angle mode of the optical lens, and the long focal length can be the telephoto mode of the optical lens. Alternatively, both the short focal length and the long focal length can be the telephoto mode of the optical lens, with the long focal length being a longer telephoto mode.

[0011] In this embodiment, by changing the surface shape of the variable lens, the curvature of the first lens group is altered. Combined with the movement of the movable lens group, this changes the focal length of the optical lens, achieving lossless zoom. When the optical lens captures external objects through its short focal length end, it has a shorter focal length and a wider field of view, facilitating the capture of close-up, wide-ranging objects with a prominent foreground. When the optical lens captures external objects through its long focal length end, it has a longer focal length and a smaller field of view, facilitating the capture of details of distant objects and hard-to-reach subjects. The optical lens's different focal lengths allow it to be used in different shooting scenarios, achieving optical zoom at different focal lengths—that is, lossless optical zoom. This results in higher quality images, better scene adaptability, and a significantly improved user shooting experience. Furthermore, it eliminates the need for multiple camera modules in the electronic device to achieve different focal lengths, thus reducing the size of the camera module 30.

[0012] The first lens group has a variable-format lens, enabling its focal length to be variable. Changes in the focal length of the first lens group significantly impact the focal length of the optical lens; even small changes in the focal length of the first lens group have a substantial effect on the optical lens's focal length, thus facilitating a wide zoom range for the optical lens. Furthermore, the variable focal length of the first lens group, combined with the coordination of the moving lens group, allows for continuous, lossless zooming between the first and second lens focal lengths, resulting in strong zoom capabilities and high image quality at various focal lengths. By incorporating a first deflection element, the propagation direction of the light beam is altered, which helps reduce the size in the second direction, thereby reducing the overall length of the optical lens and facilitating miniaturization.

[0013] In some implementations, the optical lens satisfies: FOVW / FOVT>1.1; where FOVW is the field of view of the optical lens at the short focal length end, and FOVT is the field of view of the optical lens at the long focal length end.

[0014] At this point, the optical lens has a wider field of view at the short focal length, making it easier to shoot objects at closer distances; the optical lens has a smaller field of view at the telephoto end, making it easier to shoot objects at farther distances; thus, the optical lens has stronger adaptability and both have high image quality.

[0015] Alternatively, FOVW / FOVT > 1.5.

[0016] At this time, the difference between the field angle FOVW of the optical lens at the short focal end and the field angle FOVT of the optical lens at the long focal end is large, the variation range of the field angle of the optical lens is large, and the adaptability of the optical lens is stronger.

[0017] In some embodiments, the optical lens satisfies: 0.8 < f1w / f1t < 1.6; where f1w is the focal length of the first lens group at the short focal end, and f1t is the focal length of the first lens group at the long focal end.

[0018] In this embodiment, by reasonably setting the ratio of the first focal length f1w of the first lens group at the short focal end and the second focal length f1t at the long focal end, it is beneficial for the optical lens to have a large zooming ability in a small size, and it is also beneficial to balance the image quality of the optical lens at different focal lengths.

[0019] Or, 0.8 < f1w / f1t < 1.

[0020] At this time, when the optical lens changes from the short focal end to the long focal end, the focal length of the first lens group changes from the smaller first focal length to the larger second focal length, the moving lens group moves toward the object side, and the optical lens changes from the smaller first lens focal length to the larger second lens focal length. The zooming logic of the first lens group is more adapted to the zooming logic of the optical lens, and the moving compensation distance of the moving lens group is shorter, which is convenient for the setting of the driving component and is also beneficial to balance the aberration.

[0021] Or, 1 < f1w / f1t < 1.6.

[0022] At this time, by reasonably setting the ratio of the first focal length f1w and the second focal length f1t, it is easy for the optical lens to be compatible with longer and shorter focal lengths under a smaller overall optical length, or it is easy for the optical lens to have a smaller overall optical length under a certain zoom ratio. That is, it is beneficial to balance the overall optical length and the zoom ratio of the optical lens, and it is easy for the optical lens to have a smaller overall optical length and a larger zoom ratio, making the structural design of the optical lens easier to achieve.

[0023] In some embodiments, the optical lens satisfies: TTL / (EFLT + EFLW) < 1; where TTL is the overall optical length of the optical lens, EFLW is the focal length of the optical lens at the short focal end, and EFLT is the focal length of the optical lens at the long focal end.

[0024] Exemplarily, TTL / (EFLT + EFLW) < 0.7.

[0025] In this embodiment, by reasonably setting the ratio of the overall optical length TTL to the sum of the first lens focal length EFLW and the second lens focal length EFLT, it is beneficial for the optical lens to have a smaller overall optical length, or it is beneficial for the optical lens to have a larger second lens focal length EFLT.

[0026] In some implementations, the optical lens satisfies: EFLT / IMH > 2; where IMH is the half-image height of the optical lens.

[0027] In this embodiment, by reasonably setting the ratio of the second lens focal length EFLT to the half-image height IMH, it is beneficial to enable the optical lens to have a larger second lens focal length.

[0028] In some implementations, the optical power of the first lens group is positive.

[0029] In this embodiment, the first lens group can converge the light beam and reduce the aperture of the moving lens group, thereby helping to reduce the size of the optical lens.

[0030] In some implementations, when the optical lens is changed from a short focal length to a long focal length, the radius of curvature of the object-side surface of the variable lens decreases, and / or the reciprocal of the radius of curvature of the image-side surface of the variable lens increases.

[0031] For example, when the radius of curvature of the object side of a variable surface lens decreases, it is beneficial to reduce the focal length of the variable surface lens.

[0032] For example, when the inverse of the radius of curvature of the image-side surface of a variable-shape lens increases, it is advantageous to increase the focal length of the variable-shape lens.

[0033] For example, the surface profiles of both the object-side and image-side surfaces of the variable-profile lens can be changed simultaneously, thereby altering the focal length of the variable-profile lens. In this case, the focal length of the variable-profile lens may increase or decrease, depending on the required focal length. Simultaneously changing the surface profiles of both the object-side and image-side surfaces not only alters the focal length but also helps to coordinate the object-side and image-side surfaces, thus balancing aberrations.

[0034] In some implementations, the optical lens satisfies: 3.5 < (R1W1 + R1T1) / (CT) < 7; where R1W1 is the object-side surface radius of curvature of the variable lens of the first lens group at the short focal length end, R1T1 is the object-side surface radius of curvature of the variable lens of the first lens group at the long focal length end, and CT is the distance the moving lens group moves from the short focal length end to the long focal length end.

[0035] Among them, when the values of R1W1 and R1T1 are relatively large, the optical power of the variable surface lens at the short focal end and the long focal end is small, making the first focal length of the first lens group at the short focal end easier to match the first lens focal length of the optical lens, and further making the first lens focal length easier to match the overall optical length. At this time, it is easier for the optical lens to have a smaller first lens focal length, which is beneficial to the design of a larger zoom ratio of the optical lens and also enables the optical lens to have a better wide-angle shooting effect. If the value of CT is relatively small, the moving distance of the moving lens group is small, which is beneficial to making the space reserved for the movement of the moving lens group in the optical lens relatively small, and further beneficial to the design of a relatively small overall optical length TTL of the optical lens.

[0036] In this embodiment, by reasonably setting the value of (R1W1 + R1T1) / (CT), the focal length and focal length change of the first lens group are associated with the movement of the moving lens group, so that the optical lens has a larger zoom ratio, a smaller overall optical length, and is also easy to design other parameters of the optical lens.

[0037] In some embodiments, the optical lens further includes a second lens group and a third lens group. The second lens group, the third lens group, and the moving lens group are arranged in sequence from the object side to the image side. When the optical lens changes from the short focal end to the long focal end, the moving lens group moves axially toward the object side.

[0038] Among them, the second lens group may include at least one lens.

[0039] Among them, the third lens group may include at least one lens.

[0040] In this embodiment, during the process of the optical lens switching between the short focal end and the long focal end, the moving lens group moves to complete the zoom of the optical lens. Since the moving lens group is relatively close to the image plane and has a strong compensation ability, moving the moving lens group is beneficial to the zoom of the optical lens and the compensation of aberration.

[0041] In some embodiments, the optical lens satisfies: 0.5 < R2L2 / R3L1 < 1.2; where R2L2 is the radius of curvature of the image side of the second lens group, and R3L1 is the radius of curvature of the object side of the third lens group.

[0042] Among them, the image side of the second lens group and the object side of the third lens group are two adjacent surfaces. After the light beam exits from the image side of the second lens group, it enters the third lens group from the object side of the third lens group.

[0043] In this embodiment, by reasonably setting the radius of curvature of the image side of the second lens group and the radius of curvature of the object side of the third lens group, the propagation of the light beam in the second lens group and the third lens group is smoother, which is beneficial to reducing aberration and thus improving the image quality of the optical lens.

[0044] In some implementations, the optical lens satisfies: 1.2 < (L2 + L3) / CT1W < 2.4; where L2 is the length of the second lens group along the optical axis, L3 is the length of the third lens group along the optical axis, and CT1W is the interval between the second and third lens groups along the optical axis at the short focal length end.

[0045] In this embodiment, by reasonably configuring the thickness of the second lens group, the thickness of the third lens group, and the interval between the second and third lens groups, light can pass through the second and third lens groups more smoothly, thereby improving optical quality and imaging effect.

[0046] In some implementations, the optical lens satisfies: 0.2 < |f4| / EFLT < 0.4; where f4 is the focal length of the moving lens group and EFLT is the focal length of the second lens.

[0047] In this embodiment, by reasonably setting the focal length of the moving lens group, it is easy to simplify the focal length settings of the second lens group and the third lens group, thereby making it easier to adapt to the first lens group, simplifying the design, and thus enabling the optical lens to have a strong zoom capability.

[0048] In some implementations, the optical lens satisfies: 0.2 < |f3| / EFLT < 0.3; where f3 is the focal length of the third lens group and EFLT is the focal length of the second lens.

[0049] In this embodiment, by reasonably setting the focal length of the third lens group, it is beneficial to make the third lens group easy to adapt to the first lens group, thereby enabling the optical lens to have a strong zoom capability.

[0050] In some embodiments, the second lens group is a fixed lens group, and the third lens group is movable along the optical axis. When the optical lens changes from the short focal length end to the long focal length end, the third lens group and the movable lens group are movable along the optical axis.

[0051] Alternatively, the second and third lens groups can be moved along the optical axis. When the optical lens changes from the short focal length end to the long focal length end, the second lens group, the third lens group, and the movable lens group can be moved along the optical axis.

[0052] In this embodiment, during the zooming process of the optical lens, the second lens group is fixed, while the third lens group and the movable lens group can move along the optical axis. By moving the third lens group and the movable lens group to zoom, the adjustment capability of the movable lens group is stronger, which is beneficial to improving the zoom capability and the ability to balance aberrations, which is beneficial to improving image quality.

[0053] When the optical lens changes from a short focal length to a long focal length, the second lens group, the third lens group, and the movable lens group can all move along the optical axis. Compared to moving the third lens group and the movable lens group, moving all three lens groups is equivalent to enabling the lens group behind the first pivot element to move, and giving the lens group behind the first pivot element stronger adjustment capabilities and stronger aberration balancing capabilities, which is beneficial for making the optical lens have stronger zoom capabilities and better image quality.

[0054] In some implementations, the optical power of the movable lens group is negative.

[0055] Among them, the total optical power of the last lens group of the moving lens group can be positive, that is, the total optical power of the first lens group, the second lens group and the third lens group is positive.

[0056] For example, the optical power of the first lens group is positive, the optical power of the second lens group can be negative, and the optical power of the third lens group can be positive.

[0057] In this embodiment, by reasonably setting the optical power of the moving lens group, the optical power distribution of the optical lens can be made reasonable, ensuring that the optical lens has strong zoom capability and small total optical length, and can better balance the aberrations of the optical lens, so that the optical lens has better image quality.

[0058] In some embodiments, the optical lens further includes a second deflection element located on the image side of the movable lens group. The second deflection element is used to change the light beam from a second direction to a third direction, with the second direction and the third direction having an angle.

[0059] For example, the third direction can be parallel to the first direction. Alternatively, the third direction can also have an angle with the first direction.

[0060] In this embodiment, by setting the second bending element, the optical path can be folded to reduce the total optical length (TTL) of the optical lens, thereby facilitating the miniaturization of the optical lens; in addition, the second bending element can also facilitate the setting of the position of the imaging surface, thereby facilitating the setting of the position of the photosensitive element in the camera module, and also facilitating the setting of a larger photosensitive element, thereby resulting in higher image quality.

[0061] In some embodiments, the third direction is parallel to the optical axis of the first lens group, and the second turning element has a light-emitting surface that is perpendicular to the third direction. The light-emitting surface and the first lens group are located on the same side of the optical axis of the movable lens group.

[0062] In this embodiment, light is emitted from the light-emitting surface of the second turning element along the third direction. Since the light-emitting surface and the first lens group are located on the same side of the optical axis of the moving lens group, the imaging surface is also located on the same side of the optical axis of the third lens group as the first lens group. This is equivalent to reusing the height space occupied by the first lens group in its optical axis direction, so there is no need to reserve additional space for the imaging surface and the photosensitive element. This is beneficial for the position setting of the photosensitive element, which helps to reduce the height of the optical lens in the third direction and facilitates miniaturization design.

[0063] In some embodiments, the optical lens is configured such that, during the focusing process of the optical lens, the moving lens group moves along the optical axis.

[0064] In this embodiment, the movable lens group can move during zooming and focusing, which reduces the number of components that drive the movement of each lens group and simplifies the structure of the optical lens.

[0065] Secondly, embodiments of this application provide a camera module, including a photosensitive element and an optical lens as provided in any of the embodiments of the first aspect, wherein the photosensitive element is located on the image side of the optical lens.

[0066] In this embodiment, the optical lens has strong zoom capability, high image quality at different focal lengths, and is easy to miniaturize. Therefore, the camera module can have strong zoom capability and acquire high-quality images, and is easy to miniaturize, making it widely applicable.

[0067] In some implementations, the photosensitive element is configured such that during camera module image stabilization, the photosensitive element moves in a direction perpendicular to the optical axis of the photosensitive element.

[0068] In this embodiment, image stabilization is achieved by moving the photosensitive element, which makes it easier to place the image stabilization driving component on the photosensitive element, simplifies the structure of the optical lens, and makes the layout of the camera module more reasonable.

[0069] 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.

[0070] In this embodiment, the electronic device has strong shooting capabilities and can be relatively thin, resulting in a better user experience. Attached Figure Description

[0071] 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.

[0072] In the attached image:

[0073] Figure 1 This is a schematic diagram of the structure of the electronic device provided in some embodiments of this application;

[0074] Figure 2 yes Figure 1 A partially exploded structural diagram of the electronic device shown.

[0075] Figure 3 yes Figure 2 The diagram shown is a simplified structural representation of the camera module.

[0076] Figure 4 yes Figure 3 The diagram shown is a simplified structural representation of a camera module in some embodiments.

[0077] Figure 5 yes Figure 4 The diagram shows a simplified structural representation of a camera module in different shooting modes in some embodiments.

[0078] Figure 6 yes Figure 4 The diagram shown is a simplified structural representation of the camera module in some other embodiments;

[0079] Figure 7 yes Figure 4 The diagram shown is a simplified structural representation of a camera module in some embodiments.

[0080] Figure 8 yes Figure 4 The diagram shows the structural schematics of a camera module in some specific embodiments.

[0081] Figure 9a yes Figure 8 The axial chromatic aberration curve of the camera module shown in some embodiments is located at the short focal length end.

[0082] Figure 9b yes Figure 8 The image astigmatism curve of the camera module shown in some embodiments is at the short focal length end;

[0083] Figure 9c yes Figure 8 The image shown is a distortion diagram of the camera module at the short focal length in some embodiments;

[0084] Figure 10a yes Figure 8 The axial chromatic aberration curve of the camera module shown in some embodiments is located at the telephoto end.

[0085] Figure 10b yes Figure 8 The image astigmatism curve of the camera module shown in some embodiments is located at the telephoto end.

[0086] Figure 10c yes Figure 8 The image shown is a distortion diagram of the camera module at the telephoto end in some embodiments.

[0087] Figure 11 yes Figure 4 The diagram shows the structure of the camera module in some other specific embodiments;

[0088] Figure 12a yes Figure 11 The axial chromatic aberration curve of the camera module shown in some embodiments is located at the short focal length end.

[0089] Figure 12b yes Figure 11 The image astigmatism curve of the camera module shown in some embodiments is at the short focal length end;

[0090] Figure 12c yes Figure 11 The image shown is a distortion diagram of the camera module at the short focal length in some embodiments;

[0091] Figure 13a yes Figure 11 The axial chromatic aberration curve of the camera module shown in some embodiments is located at the telephoto end.

[0092] Figure 13b yes Figure 11 The image astigmatism curve of the camera module shown in some embodiments is located at the telephoto end.

[0093] Figure 13c yes Figure 11 The image shown is a distortion diagram of the camera module at the telephoto end in some embodiments.

[0094] Figure 14 yes Figure 4 The diagram shows the structure of the camera module in some specific embodiments;

[0095] Figure 15a yes Figure 14 The axial chromatic aberration curve of the camera module shown in some embodiments is located at the short focal length end.

[0096] Figure 15b yes Figure 14 The image astigmatism curve of the camera module shown in some embodiments is at the short focal length end;

[0097] Figure 15c yes Figure 14 The image shown is a distortion diagram of the camera module at the short focal length in some embodiments;

[0098] Figure 16a yes Figure 14The axial chromatic aberration curve of the camera module shown in some embodiments is located at the telephoto end.

[0099] Figure 16b yes Figure 14 The image astigmatism curve of the camera module shown in some embodiments is located at the telephoto end.

[0100] Figure 16c yes Figure 14 The image shown is a distortion diagram of the camera module at the telephoto end in some embodiments.

[0101] Figure 17 yes Figure 4 The diagram shows a structural schematic of the camera module in some specific embodiments;

[0102] Figure 18a yes Figure 17 The axial chromatic aberration curve of the camera module shown in some embodiments is located at the short focal length end.

[0103] Figure 18b yes Figure 17 The image astigmatism curve of the camera module shown in some embodiments is at the short focal length end;

[0104] Figure 18c yes Figure 17 The image shown is a distortion diagram of the camera module at the short focal length in some embodiments;

[0105] Figure 19a yes Figure 17 The axial chromatic aberration curve of the camera module shown in some embodiments is located at the telephoto end.

[0106] Figure 19b yes Figure 17 The image astigmatism curve of the camera module shown in some embodiments is located at the telephoto end.

[0107] Figure 19c yes Figure 17 The image shown is a distortion diagram of the camera module at the telephoto end in some embodiments.

[0108] Figure 20 yes Figure 4 The diagram shows the structure of the camera module in some other specific embodiments;

[0109] Figure 21a yes Figure 20 The axial chromatic aberration curve of the camera module shown in some embodiments is located at the short focal length end.

[0110] Figure 21b yes Figure 20 The image astigmatism curve of the camera module shown in some embodiments is at the short focal length end;

[0111] Figure 21c yes Figure 20 The image shown is a distortion diagram of the camera module at the short focal length in some embodiments;

[0112] Figure 22a yes Figure 20 The axial chromatic aberration curve of the camera module shown in some embodiments is located at the telephoto end.

[0113] Figure 22b yes Figure 20 The image astigmatism curve of the camera module shown in some embodiments is located at the telephoto end.

[0114] Figure 22c yes Figure 20 The image shown is a distortion diagram of the camera module at the telephoto end in some embodiments. Detailed Implementation

[0115] For ease of understanding, the English abbreviations and related technical terms used in the embodiments of this application will be explained and described below.

[0116] Optical 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.

[0117] A lens or lens group with positive optical power, having a positive focal length, and having the effect of converging light.

[0118] A lens or lens group with negative optical power has a negative focal length and has the effect of diverging light.

[0119] 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 scene at infinity 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.

[0120] Effective focal length (EFL) refers to the distance from the principal point to the point where the light rays converge, i.e., the focal point.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] The optical axis is a perpendicular axis passing through the center of a lens; it also refers to the center line of a light beam (light column) or the axis of symmetry of an optical system. The optical axis of a lens is the axis passing through the centers of all the individual lenses within the lens. When light rays parallel to the optical axis enter a convex lens, an ideal convex lens should converge all the light rays to a single point behind the lens; this point where all the light rays converge is called the focal point.

[0128] The focal point is the point where parallel light rays converge after being refracted by a lens or lens group.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] Half-image height (ImH): refers to the height of the half-image formed by the lens.

[0133] Maximum Image Circle Diameter (MIC) is the diameter of the largest circle imaged by a circular optical system. It depends on or is determined by the size of the sensor used in conjunction with the system.

[0134] 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.

[0135] Axial chromatic 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.

[0136] Distortion, also known as 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, and this difference is the distortion. Therefore, distortion only changes the imaging position of an off-axis object point on the ideal plane, causing distortion in the image shape, but it does not affect the image's sharpness.

[0137] 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 at 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.

[0138] 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.

[0139] 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.

[0140] 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 central field of view. When field curvature exists in a lens, 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.

[0141] Optical image stabilization (OIS) relies on the structure and movement of special lenses or image sensors to minimize image instability caused by operator shake during use.

[0142] Auto focus (AF) is a method that uses the principle of light reflection from an object to receive the reflected light from the sensor on the camera (module), process it through a computer, and drive the motorized focusing device to focus.

[0143] The embodiments of this application are described below with reference to the accompanying drawings.

[0144] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Multiple" refers to at least two.

[0145] The directional terms mentioned in the embodiments of this application, such as "upper", "lower", "inner", "outer", "top", "bottom", "side", etc., 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.

[0146] In the embodiments of this application, the relative positional relationships mentioned, such as parallel, perpendicular, and aligned, are defined in relation to the current technological level, rather than being absolutely strict. Slight deviations are permissible; approximations of parallelism, perpendicularity, or alignment are all 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.

[0147] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0148] Please see Figure 1 and Figure 2 , Figure 1This is a schematic diagram of the structure of the electronic device 100 provided in some embodiments of this application. Figure 2 yes Figure 1 This is a partially exploded structural diagram of the electronic device 100. In this embodiment, the electronic device 100 is described as a mobile phone. It can be understood that... Figure 1 and Figure 2 The electronic device 100 is shown only schematically, and the actual shape, size, location, and construction of these components are not subject to change. Figure 1 and Figure 2 Due to limitations, electronic device 100 may also include, compared to Figure 1 and Figure 2 More or fewer parts.

[0149] 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 (MLED) display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD) display screen, etc.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] In some embodiments, such as Figure 2 As shown, the electronic device 100 also includes a circuit board 50 and an image processor 60. The circuit board 50 and image processor 60 are located within the internal storage 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. It is understood that the camera module 30 and the image processor 60 can also achieve communication through other methods capable of data transmission.

[0157] 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.

[0158] 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.

[0159] In other embodiments, the electronic device 100 may also exclude the screen 10 and / or camera cover 203.

[0160] 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.

[0161] Understandable, Figure 1 and Figure 2 The installation position of the camera module 30 in the illustrated embodiment of the electronic device 100 is merely illustrative, and this application does not strictly limit the installation position of the camera module 30. In some other embodiments, the camera module 30 may also be installed in other locations on the electronic device 100, such as 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 disposed on the auxiliary component.

[0162] Please refer to the following: Figure 2 and Figure 3 , Figure 3 yes Figure 2 The diagram shows a simplified structural representation of the camera module 30.

[0163] 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.

[0164] 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.

[0165] Photosensitive element 2 utilizes the photoelectric conversion function of optoelectronic devices to convert the light image on its photosensitive surface into an electrical signal proportional to the light image. The photosensitive surface of photosensitive element 2 faces the optical lens 1. Photosensitive element 2 can be a charge-coupled device (CCD), a complementary metal-oxide-semiconductor (CMOS) device, 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 a 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. Complementary metal-oxide-semiconductor devices mainly utilize semiconductors made of silicon and germanium, allowing N-type (negative) and P-type (positive) semiconductors to coexist on the CCD. The current generated by these complementary effects can be recorded and interpreted by the processing chip as an image.

[0166] 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.

[0167] The optical lens 1 can be a vertical lens or a periscope lens. This embodiment describes the optical lens 1 as a periscope lens. When the optical lens 1 is a periscope lens, it is better suited for use in thin electronic devices.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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: 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 [link to image processor]). Figure 2 ).

[0172] Please see Figure 4 , Figure 4 yes Figure 3 The diagram shown is a simplified structural representation of the camera module 30 in some embodiments.

[0173] In some embodiments, the optical lens 1 includes a first lens group G1, a first refractive element 4, and a movable lens group G2. The first lens group G1, the first refractive element 4, and the movable lens group G2 are arranged sequentially from the object side to the image side. The optical lens 1 has a short focal length end and a long focal length end. It is understood that when the optical lens 1 is at the short focal length end, the camera module 30 is also at the short focal length end; when the optical lens 1 is at the long focal length end, the camera module 30 is also at the long focal length end. It is understood that in the optical lens 1, external light enters the first lens group G1 and exits, passing through the first optical path refractive element, and then through the movable lens group G2 before exiting the optical lens 1. In the camera module 30, the outgoing light emitted from the optical lens 1 can be received and captured by the photosensitive element 2, thereby forming an image.

[0174] The first lens group G1 may include at least one surface-type variable lens.

[0175] For example, the first lens group G1 may include only one planar variable lens. Alternatively, the first lens group G1 may include one planar variable lens and at least one planar fixed lens, or it may include multiple planar variable lenses and at least one planar fixed lens. For example, the number of lenses in the first lens group G1 may be 2, 3, 4, etc. When the first lens group G1 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 first lens group G1. For example, the optical axis direction of the first lens group G1 may be parallel to the Z direction.

[0176] For example, a variable-format lens can refer to a lens whose focal length can be changed by altering its surface shape, thereby changing its curvature. For example, a variable-format lens can change its focal length by changing the shape of its object-side surface and / or image-side surface. For instance, a variable-format lens can be a liquid lens, etc. When the focal length of the variable-format lens changes, the focal length of the first lens group G1 changes accordingly. Specifically, the focal length of the variable-format lens can be changed by altering the surface shape of its object-side surface and / or image-side surface.

[0177] The first deflection element 4 is used to change the propagation direction of the light beam.

[0178] For example, the first deflection element 4 is used to change the propagation direction of the light beam from a first direction to a second direction. The first direction can be the direction in which the light beam enters the first deflection element 4, and the second direction can be the direction in which the light beam exits the first deflection element 4. It is understood that the first deflection element 4 is located on the image side of the first lens group G1, and the first direction can be the direction in which the light beam exits from the first lens group G1, and the first direction can be parallel to the optical axis of the first lens group G1. The first deflection element 4 is located on the object side of the movable lens group G2, and the light beam can enter the movable lens group G2 from the second direction; when the optical axis of the movable lens group G2 is not bent, the second direction can be parallel to the optical axis of the movable lens group G2.

[0179] For example, the first turning element 4 can be a prism, a reflector, etc.

[0180] The movable lens group G2 may include at least one lens. Alternatively, the movable lens group G2 may include multiple lenses. For example, the number of lenses in the movable lens group G2 may be 2, 3, 4, etc. When the movable lens group G2 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 movable lens group G2. For example, the optical axis direction of the movable lens group G2 may be parallel to the Y direction.

[0181] For example, the movable lens group G2 can refer to a lens group whose position along the optical axis can be changed to perform zooming or focusing. It is understood that the position of the movable lens group G2 can be moved to a set position and kept relatively fixed. The movable lens group G2 can be driven by a drive mechanism such as a voice coil motor to achieve this movement.

[0182] When optical lens 1 is at its short focal length, it has a first focal length, and the first lens group G1 also has a first focal length. In this case, optical lens 1 can capture images of external objects at its short focal length. When optical lens 1 is at its long focal length, it has a second focal length, and the first lens group G1 also has a second focal length. In this case, optical lens 1 can capture images of external objects at its long focal length. That is, the first focal length is the focal length of the first lens group G1 at its short focal length, and the second focal length is the focal length of the first lens group G1 at its long focal length.

[0183] In this configuration, the focal length of the first lens can be shorter than that of the second lens; that is, the focal length of optical lens 1 at the short focal length end is shorter than its focal length at the long focal length end. In this case, the short focal length end can be the wide-angle mode of optical lens 1, and the long focal length end can be the telephoto mode of optical lens 1. Alternatively, both the short focal length end and the long focal length end can be the telephoto mode of optical lens 1, with the long focal length end being a telephoto mode with an even longer focal length.

[0184] Optical lens 1 can zoom between a short focal length end and a long focal length end. During zooming, the focal length of the first lens group G1 changes, and the position of the movable lens group G2 changes, thus changing the focal length of optical lens 1. For example, a variable-format lens changes its surface shape, changing the focal length of the first lens group G1 from a first focal length to a second focal length. By moving the movable lens group G2 along the optical axis, the focal length of optical lens 1 changes from the first lens focal length to the second lens focal length, thus changing optical lens 1 from a short focal length end to a long focal length end. Similarly, changing optical lens 1 from a long focal length end to a short focal length end can be the reverse process. The first and second lens focal lengths can be the limiting focal lengths within the zoom capability range of optical lens 1, but are not strictly limited to them.

[0185] It is understandable that optical lens 1 exists in an intermediate state during the switching between the short focal length and the long focal length. In this intermediate state, the focal length of optical lens 1 falls within the range of the first and second lens focal lengths, and optical lens 1 can still produce a clear image. At this time, optical lens 1 can be used in an intermediate shooting mode. Optical lens 1 can achieve continuous lossless zoom from the short focal length to the long focal length.

[0186] Specifically, as an example, a variable-area lens can change its curvature through electro-deformation actuation. That is, applying an electric current to the variable-area lens changes its curvature, thereby changing its focal length. This allows the first lens group G1 to adjust its focal length, and consequently, the focal length of the optical lens 1 can be adjusted, achieving optical zoom within a relatively small space. During optical zoom, changing the curvature of any one of the variable-area lenses will achieve optical zoom for the optical lens 1. In some embodiments, when the first lens group G1 includes multiple variable-area lenses, multi-magnification zoom can be achieved through the interaction of these lenses. In other embodiments, the variable-area lens can change its curvature through force-induced deformation actuation, thereby changing the focal length of the first lens group G1.

[0187] Once the optical lens 1 has zoomed in, it can focus by moving the movable lens group G2 to obtain a clearer image. The optical lens can focus and form an image in telephoto, focal length, or intermediate shooting modes. The movable lens group G2 can move during both zooming and focusing, reducing the number of components that drive the movement of each lens group and simplifying the structure of the optical lens 1.

[0188] In this embodiment, by changing the surface shape of the variable-face lens, the curvature of the first lens group G1 is altered. Combined with the movement of the movable lens group G2, this changes the focal length of the optical lens 1, achieving lossless zoom. When the optical lens 1 captures external objects through its short focal length end, it has a shorter focal length and a wider field of view, facilitating the capture of close-up, wide-ranging objects with a prominent foreground. When the optical lens 1 captures external objects through its long focal length end, it has a longer focal length and a smaller field of view, facilitating the capture of details of distant objects and hard-to-reach subjects. The optical lens 1 has different focal lengths, enabling it to shoot at different focal lengths in different shooting scenarios, achieving optical zoom at different focal lengths—that is, lossless optical zoom. This results in higher quality images, better scene adaptability of the optical lens 1, and a significantly improved user shooting experience. Furthermore, it eliminates the need for multiple camera modules 30 in the electronic device to achieve different focal lengths, thus reducing the size of the camera module 30.

[0189] The first lens group G1 has a variable-format lens, enabling its focal length to be variable. The change in the focal length of the first lens group G1 has a significant impact on the focal length of the optical lens 1; that is, even a small change in the focal length of the first lens group G1 has a large effect on the focal length of the optical lens 1, thus facilitating a wide zoom range for the optical lens 1. Furthermore, the variable focal length capability of the first lens group G1, in conjunction with the movable lens group G2, allows the optical lens 1 to continuously and losslessly zoom between the first and second lens focal lengths, giving it strong zoom capabilities and high image quality at different focal lengths. By incorporating the first deflection element 4, the propagation direction of the light beam is altered, which helps reduce the size in the second direction, thereby reducing the length of the optical lens 1 and facilitating its miniaturization design.

[0190] It is understood that the image side of the first transition element 4 may only have the movable lens group G2. In some embodiments, the object side of the first transition element 4 may also have a greater number of lens groups.

[0191] In some embodiments, the optical lens 1 can satisfy: FOVW / FOVT>1.1.

[0192] Among them, FOVW is the field of view angle of the optical lens 1 at the short focal length end, and FOVT is the field of view angle of the optical lens 1 at the long focal length end. Among them, the optical lens 1 varies between the short focal length end and the long focal length end, and the field of view angle of the optical lens 1 can also vary between FOVW and FOVT, and imaging can be performed at the corresponding field of view angles therebetween. At this time, the field of view angle of the optical lens 1 at the short focal length end is larger, and the optical lens 1 is convenient for shooting scenes at closer distances; the field of view angle of the optical lens 1 at the long focal length end is smaller, which is convenient for shooting scenes at farther distances; thereby making the adaptability of the optical lens 1 stronger, and both having high imaging quality.

[0193] In some examples, the optical lens 1 satisfies: FOVW / FOVT>1.5. At this time, the difference between the field of view angle FOVW of the optical lens 1 at the short focal length end and the field of view angle FOVT of the optical lens 1 at the long focal length end is large, the variation range of the field of view angle of the optical lens 1 is large, and the adaptability of the optical lens 1 is stronger.

[0194] For example, the values of the half field of view angle HFOVW of the optical lens 1 at the short focal length end and the field of view angle HFOVT of the optical lens 1 at the long focal length end can be: when HFOVW is 17.6°, HFOVT is 11°, then FOVW / FOVT is 1.6; or, when HFOVW is 17.7°, HFOVT is 11°, then FOVW / FOVT is 1.59; or, when HFOVW is 18.59°, HFOVT is 11.16°, then FOVW / FOVT is 1.67; or, when HFOVW is 19.15°, HFOVT is 9.21°, then FOVW / FOVT is 2.08.

[0195] In some embodiments, the first lens group G1 of the optical lens 1 can satisfy: 0.8<f1w / f1t<1.6. Among them, f1w is the first focal length and f1t is the second focal length.

[0196] During the zooming process of the optical lens 1, the focal length of the first lens group G1 changes. The change in the focal length of the first lens group G1 will also affect the moving distance of the moving lens group G1 and also has an impact on the aberration of the imaging. Moreover, when the focal length of the first lens group G1 changes and is combined with the movement of the moving lens group G2, the focal length of the optical lens is changed together to achieve zooming. In a general lens, a smaller focal length of the lens means that the lens can have a smaller overall optical length, and a larger focal length of the lens means that the lens requires a larger overall optical length. Therefore, in this embodiment, the optical lens 1 can zoom, that is, the optical lens 1 has both a smaller focal length and a larger focal length at the same time, so the optical lens 1 needs to have a suitable overall optical length to accommodate different focal lengths of the optical lens 1. By reasonably setting the ratio of the first focal length f1w of the first lens group G1 at the short focal end to the second focal length f1t at the long focal end in this embodiment, it is beneficial for the optical lens 1 to have a large zooming ability in a small size and is also beneficial for balancing the image quality of the optical lens 1 at different focal lengths.

[0197] In some examples, the optical lens 1 can satisfy: 0.8 < f1w / f1t < 1. At this time, the optical lens 1 has a smaller first lens focal length at the short focal end and a larger second lens focal length at the long focal end; and the first lens group G1 has a smaller first focal length f1w at the short focal end and a larger second focal length f1t at the long focal end (that is, f1w is less than f1t), and the magnitudes of the first focal length f1w and the second focal length f1t respectively match the magnitudes of the first lens focal length and the second lens focal length of the optical lens 1. When the optical lens 1 changes from the short focal end to the long focal end, the focal length of the first lens group G1 changes from the smaller first focal length to the larger second focal length, and the moving lens group G2 moves toward the object side, and the optical lens 1 changes from the smaller first lens focal length to the larger second lens focal length. The zooming logic of the first lens group G1 is more adapted to the zooming logic of the optical lens 1, and the moving compensation distance of the moving lens group G2 is shorter, which is convenient for the setting of the driving component and is also beneficial for balancing the aberration.

[0198] For example, the value of f1w / f1t can be 0.91, 0.93, 0.95, 0.97, 0.99, etc.

[0199] For example, when the overall optical length of the optical lens 1 is less than 32 mm and 0.8 < f1w / f1t < 1, the moving distance of the moving lens group G2 during the process of changing from the short focal end to the long focal end is less than 5.5 mm.

[0200] In some examples, the optical lens 1 can satisfy: 1 < f1w / f1t < 1.6. At this time, the optical lens 1 has a smaller first lens focal length at the short focal end and a larger second lens focal length at the long focal end. The first lens group G1 has a larger first focal length f1w at the short focal end, and the refractive power of the first lens group G1 is weak, which is convenient for accommodating the optical lens 1 with a larger overall optical length; the first lens group G1 has a smaller second focal length f1t at the long focal end (i.e., f1w is greater than f1t), and the refractive power of the first lens group G1 is strong, which is convenient for accommodating the optical lens 1 with a smaller overall optical length. Since the overall optical length of the optical lens 1 remains unchanged, and the optical lens 1 needs to be compatible with both the short focal end with a shorter focal length (the first lens focal length) and the long focal end with a longer focal length (the second lens focal length) at the same time. Therefore, by reasonably setting the ratio of the first focal length f1w to the second focal length f1t, it is easy for the optical lens 1 to be compatible with a longer focal length and a shorter focal length under a smaller overall optical length, or it is easy for the optical lens 1 to have a smaller overall optical length under a certain zoom ratio. That is, it is beneficial to balance the overall optical length and the zoom ratio of the optical lens 1, and it is easy for the optical lens 1 to have a smaller overall optical length and a larger zoom ratio, making the structural design of the optical lens 1 easier to achieve. Among them, the zoom ratio can refer to the ratio of the second lens focal length to the first lens focal length of the optical lens 1.

[0201] During the process of the optical lens 1 changing from the short focal end to the long focal end, the focal length of the first lens group G1 changes from the larger first focal length to the smaller second focal length, and the moving lens group G2 moves toward the object side, and the focal length of the optical lens 1 changes from the smaller first lens focal length to the larger second lens focal length.

[0202] For example, the value of f1w / f1t can be 1.12, 1.2, 1.3 or 1.46, etc. Further, the optical lens 1 can satisfy: 1.1 < f1w / f1t < 1.5.

[0203] Exemplarily, the first lens group G1 can satisfy: 20mm < f1w < 60mm; 20mm < f1t < 40mm. For example, the value of f1w can be 22.58mm, 28.02mm, 28.80mm, 32.32mm or 52.64mm, etc. The value of f1t can be 23.27mm, 28.74mm, 28.93mm, 30.37 or 36.14mm, etc.

[0204] In some embodiments, the optical lens 1 can satisfy: TTL / (EFLT + EFLW) < 1. Here, TTL is the total optical length of the optical lens 1, EFLW is the focal length of the first lens, and EFLT is the focal length of the second lens. Both the first lens focal length EFLW and the second lens focal length EFLT of the optical lens 1 have an impact on the total optical length TTL, and the values of the three are coupled to each other; and, since the second lens focal length EFLT is greater than the first lens focal length EFLW, the second lens focal length EFLT has a greater impact on the ratio of the above formula. In this embodiment, by reasonably setting the ratio of the total optical length TTL to the sum of the first lens focal length EFLW and the second lens focal length EFLT, it is beneficial to make the optical lens 1 have a smaller total optical length, or it is beneficial to make the optical lens 1 have a larger second lens focal length EFLT.

[0205] In some examples, the optical lens 1 can satisfy: TTL / (EFLT + EFLW) < 0.7. For example, the ratio TTL / (EFLT + EFLW) of the total optical length TTL to the sum of the first lens focal length EFLW and the second lens focal length EFLT can be 0.5, 0.6, 0.62, 0.65, 0.66, 0.68, or 0.7, etc. At this time, the optical lens 1 can balance a smaller total optical length and a larger second lens focal length EFLT.

[0206] Among them, the total optical length TTL of the optical lens 1 can be less than 45 mm (millimeters). For example, the total optical length TTL can be 27.3 mm, 28.1 mm, 29.6 mm, 30 mm, 35 mm, 41 mm, or 45 mm, etc. Further, the optical lens 1 can satisfy: TTL < 30 mm.

[0207] Among them, the first lens focal length EFLW of the optical lens 1 can be greater than 15 mm. For example, the first lens focal length EFLW can be 15 mm, 16 mm, 17.1 mm, or 20 mm, etc.

[0208] Among them, the second lens focal length EFLT of the optical lens 1 can be greater than 25 mm. For example, the second lens focal length EFLT can be 25 mm, 26 mm, 28 mm, 28.3 mm, or 42 mm, etc.

[0209] Among them, the optical lens 1 can also satisfy: 1.5 < EFLT / EFLW. The ratio of the second lens focal length EFLT to the first lens focal length EFLW can also be used as the zoom ratio of the optical lens 1. For example, EFLT / EFLW can be 1.6, 1.65, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, or 2.3, etc.

[0210] In some embodiments, the optical lens 1 can satisfy: EFLT / IMH > 2. Here, IMH is the half-image height of the optical lens 1. This is advantageous for the optical lens 1 to have a larger second lens focal length. For example, the ratio of the second lens focal length EFLT to the half-image height IMH, EFLT / IMH, can be 2.5, 2.94, 3, 3.07, or 3.5, etc. In some examples, the ratio of the second lens focal length EFLT to the half-image height IMH, EFLT / IMH, can be greater than 3.

[0211] In some embodiments, the optical power of the first lens group G1 can be positive. The first lens group G1 can maintain the direction of the optical axis and converge light rays, thereby facilitating the focusing of the optical lens 1. The positive optical power of the first lens group G1 can mean that the optical power of the first lens group G1 is positive at least at the short focal length end. In this case, the first lens group G1 can converge the light beam, reducing the lens aperture of the movable lens group G2, thereby helping to reduce the size of the optical lens 1.

[0212] It is understandable that the aforementioned limitations on the ratio of the field of view (FOVW) at the short focal length end to the field of view (FOVT) at the long focal length end of the optical lens 1, the ratio of the first focal length (f1w) to the second focal length (f1t) of the optical lens 1, the ratio of the total optical length (TTL) of the optical lens 1 to the sum of the first lens focal length (EFLW) and the second lens focal length (EFLT), and the ratio of the second lens focal length (EFLT) of the optical lens 1 to the half-image height (IMH) can exist independently or in combination. When the above multiple ratio ranges are combined, the optical lens 1 can achieve better focusing ability, image quality, and manufacturability, and can have strong zoom capability in a smaller volume. In some embodiments, the camera module 30 can achieve both long-distance shooting and macro shooting through the optical lens 1. For example, the closest object distance for macro shooting can be 10cm, 5cm, or 3cm. For example, macro shooting can be achieved by further focusing at the long focal length end.

[0213] In some embodiments, when the optical lens 1 is changed from the short focal length end to the long focal length end, the radius of curvature of the object side of the variable surface lens decreases, and / or the reciprocal of the radius of curvature of the image side of the variable surface lens increases.

[0214] The focal length of a variable-shape lens can be changed by altering either the object-side surface profile or the image-side surface profile.

[0215] When the radius of curvature of the object-side surface of a variable-format lens decreases, it is advantageous to reduce the focal length of the lens. For example, if the object-side surface of a variable-format lens is convex, a smaller radius of curvature results in a greater degree of convexity.

[0216] When the inverse of the radius of curvature of the image-side surface of a variable-format lens increases, it is advantageous to increase the focal length of the lens. For example, if the object-side surface of a variable-format lens is convex, an increase in the inverse of its radius of curvature will reduce its convexity or cause it to become concave. If the object-side surface of a variable-format lens is concave, an increase in the inverse of its radius of curvature will result in a greater degree of concavity.

[0217] This can also involve simultaneously changing the surface profiles of both the object-side and image-side surfaces of the variable-profile lens, thereby altering its focal length. In this case, the focal length of the variable-profile lens can either increase or decrease, depending on the desired focal length. Simultaneously changing the surface profiles of both the object-side and image-side surfaces not only alters the focal length but also helps to coordinate the object-side and image-side surfaces, thus balancing aberrations.

[0218] In some embodiments, the optical lens 1 can satisfy: 3.5 < (R1W1 + R1T1) / (CT) < 7.

[0219] Wherein, R1W1 is the object-side surface radius of curvature of the variable-size lens of the first lens group G1 at the short focal length end, R1T1 is the object-side surface radius of curvature of the variable-size lens of the first lens group G1 at the long focal length end, and CT is the distance that the moving lens group G2 moves from the short focal length end to the long focal length end.

[0220] For example, the value of R1W1+R1T1 can be greater than 25mm.

[0221] For example, a CT value can be greater than 4 mm. A CT value can be less than 9 mm. But it is not limited to these.

[0222] The radius of curvature of the object-side surface of the first lens group G1 affects the focal length of the optical lens 1, and the moving distance of the moving lens group G2 also affects the focal length of the optical lens 1. Therefore, to achieve zoom capability of the optical lens 1, the object-side surface of the first lens group G1 can have different radii of curvature at the short focal length and long focal length, and the moving lens group G2 can have different positions at the short focal length and long focal length. By defining the relationship between R1W1, R1T1, and CT, the optical lens 1 can achieve a large zoom range.

[0223] When the values ​​of R1W1 and R1T1 are large, the optical power of the variable lens at both the short and long focal lengths is small. This makes it easier for the first focal length of the first lens group G1 at the short focal length to match the first lens focal length of the optical lens 1, and thus makes it easier to match the first lens focal length with the total optical length. In this case, the optical lens 1 is more likely to have a smaller first lens focal length, which is beneficial for the design of a larger zoom ratio and also gives the optical lens 1 a better wide-angle shooting effect. If the value of CT is small, the moving distance of the moving lens group G2 is smaller, which is beneficial for the optical lens 1 to have less space reserved for the movement of the moving lens group G2, and thus is beneficial for the design of a smaller total optical length (TTL) of the optical lens 1. Therefore, by reasonably setting the value of (R1W1+R1T1) / (CT), the focal length and focal length change of the first lens group G1 are correlated with the movement of the moving lens group G2, thereby enabling the optical lens 1 to have a larger zoom ratio, a smaller total optical length, and also facilitating the design of other parameters of the optical lens 1.

[0224] Please refer to the following: Figure 4 and Figure 5 , Figure 5 yes Figure 4 The diagram shown is a simplified structural representation of the camera module 30 in different shooting modes in some embodiments.

[0225] In some embodiments, the optical lens 1 may further include a second lens group G3 and a third lens group G4. The second lens group G3, the third lens group G4, and the movable lens group G2 are arranged sequentially from the object side to the image side.

[0226] In some embodiments, the movable lens group G2 can be moved along the optical axis.

[0227] The second lens group G3 may include at least one lens. For example, the optical power of the second lens group G3 may be negative. The second lens group G3 may not change the direction of the optical axis, and it may diverge light rays. The second lens group G3 may include one lens. The second lens group G3 may also include multiple lenses, such as 2, 3, or 4 lenses. When the second lens group G3 has multiple lenses, aberrations can be eliminated or reduced by combining different materials of the 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 second lens group G3.

[0228] For example, the second lens group G3 in the optical lens 1 can be fixed or movable; this embodiment is not strictly limited. For example, the optical axis of the second lens group G3 can be parallel to the Y direction.

[0229] The third lens group G4 may include at least one lens. For example, the optical power of the third lens group G4 is positive. The third lens group G4 may not change the direction of the optical axis, and it can focus light rays, further improving the focusing of the optical lens 1. The third lens group G4 may include one lens. The third lens group G4 may also include multiple lenses, such as 2, 3, or 4 lenses. When the third lens group G4 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 third lens group G4.

[0230] For example, the third lens group G4 in the optical lens 1 can be fixed or movable, and this embodiment is not strictly limited. For example, the optical axis of the third lens group G4 can be parallel to the Y direction.

[0231] For example, when the optical lens 1 changes from the short focal length end to the long focal length end, the movable lens group G2 moves along the optical axis. The movable lens group G2 can move towards the object side. The movable lens group G2 can be driven by a driving component to move along the optical axis. For example, if the optical axis of the movable lens group G2 is parallel to a second direction, the movable lens group G2 can move along the second direction towards the third lens group G4.

[0232] In this embodiment, during the switching between the short focal length and the long focal length, the optical lens 1 achieves zoom by moving the movable lens group G2. Since the movable lens group G2 is closer to the image plane, its compensation capability is stronger. Therefore, moving the movable lens group G2 is beneficial for the zooming of the optical lens 1 and for the compensation of aberrations.

[0233] In some embodiments, the second lens group G3 is a fixed lens group, and the third lens group G4 is movable. For example, during the zooming process of the optical lens 1, the third lens group G4 and the movable lens group G2 can move along the optical axis toward the object side; zooming by moving both the third lens group G4 and the movable lens group G2 makes the movable lens group G2 more adjustable, which is beneficial to improving zoom capability, and also to improving the ability to balance aberrations, which is beneficial to improving image quality.

[0234] In some other embodiments, the second lens group G3 and the third lens group G4 are movable along the optical axis. For example, when the optical lens 1 changes from a short focal length to a long focal length, the second lens group G3, the third lens group G4, and the movable lens group G2 can all move along the optical axis toward the object side. Compared to moving the third lens group G4 and the movable lens group G2, moving all three lens groups is equivalent to enabling the lens groups behind the first pivot element 4 to move, and giving the lens groups behind the first pivot element 4 stronger adjustment capabilities and stronger aberration balancing capabilities, which is beneficial for making the optical lens 1 have stronger zoom capabilities and better image quality.

[0235] In some embodiments, the first deflection element 4 may include an incident light surface 41, a reflecting surface 42, and an exiting light surface 43. The incident light surface 41 may be perpendicular to the optical axis of the first lens group G1 and face the first lens group G1. The exiting light surface 43 may be perpendicular to the second lens group G3 and face the second lens group G3. The reflecting surface 42 receives the light beam from the incident light surface 41 and reflects it out through the exiting light surface 43, thereby changing the propagation direction of the light beam from the optical axis of the first lens group G1 to the optical axis of the second lens group G3. For example, the first deflection element 4 may be a prism.

[0236] In some embodiments, the optical lens 1 may further include a second deflection element 5. The second deflection element 5 may be located on the image side of the movable lens group G2, and the second deflection element 5 is used to change the light beam from the second direction to a third direction, the third direction having an angle with the second direction. The second deflection element 5 may have an incident surface 51, a reflecting surface 52, and an exiting surface 53. The incident surface 51 may be perpendicular to the second direction, and the exiting surface 53 may be perpendicular to the third direction.

[0237] For example, the second direction can be perpendicular to the third direction. The light-incident surface 51 of the second deflection element 5 can be positioned towards the movable lens group G2. In the first direction, the light-exit surface 53 of the second deflection element 5 can be located on the side of the optical axis of the movable lens group G2 facing away from the first lens group G1. In this case, the half-image height of the optical lens 1 is not overly limited by the size of the optical lens 1 in the first direction, which is beneficial for setting a larger half-image height and for obtaining higher quality images.

[0238] It is easy to understand that the photosensitive element 2 of the camera module 30 can be positioned facing the light-emitting surface 53 of the second turning element 5 and perpendicular to the third direction. At this time, the photosensitive element 2 is located on the side of the optical axis of the moving lens group G2 facing away from the first lens group G1 in the first direction. When the half-image height of the optical lens 1 is large, the size of the photosensitive element 2 can be set to be larger accordingly, which is beneficial for the camera module 30 to obtain higher quality images.

[0239] Furthermore, the photosensitive element 2 can be configured such that, during the image stabilization process of the camera module 30, the photosensitive element 2 can move along a direction perpendicular to its optical axis. In this case, image stabilization is achieved by moving the photosensitive element 2, which facilitates the placement of the image stabilization drive component on the photosensitive element 2, simplifies the structure of the optical lens 1, and makes the layout of the camera module 30 more rational. In some other embodiments, image stabilization can also be achieved by moving the optical elements in the optical lens 1.

[0240] like Figure 5 When the optical lens 1 is at the short focal length end, the first lens group G1 can have a first focal length, and the movable lens group G2 can be located in a first position, and the optical lens 1 has a first lens focal length.

[0241] When the optical lens 1 is at the telephoto end, the first lens group G1 can have a second focal length, and the movable lens group G2 can be located in a second position, so that the optical lens 1 has a second lens focal length.

[0242] Between the short focal length end and the long focal length end, the optical lens 1 can be in an intermediate shooting mode, the first lens group G1 can have a third focal length, the value of the third focal length can be between the value of the first focal length and the value of the second focal length, the movable lens group G2 can be in a third position, the third position can be between the first position and the second position, the optical lens 1 can have a third lens focal length, the value of the third lens focal length can be between the value of the first lens focal length and the value of the second lens focal length.

[0243] Therefore, the optical lens 1 can switch between the short focal length end and the long focal length end, and it is lossless zoom. It can also perform imaging in the mode between the short focal length end and the long focal length end, so that the optical lens 1 can continuously zoom without loss.

[0244] In some embodiments, the total optical length (TTL) of the optical lens 1 can be less than 30 mm. In this case, the optical lens 1 has a smaller length, which is beneficial for making the camera module 30 smaller and easier to apply to electronic devices. For example, the total optical length (TTL) of the optical lens 1 can be 27 mm, 27.3 mm, 28 mm, 28.1 mm, 29 mm, 29.6 mm, or 30 mm.

[0245] In some embodiments, the optical lens 1 satisfies: 0.5 < R2L2 / R3L1 < 1.2. Here, R2L2 is the radius of curvature of the image side of the second lens group G3, and R3L1 is the radius of curvature of the object side of the third lens group G4. The image side of the second lens group G3 and the object side of the third lens group G4 are two adjacent surfaces. After the light beam exits from the image side of the second lens group G3, it enters the third lens group G4 from the object side of the third lens group G4. At this time, by reasonably setting the radius of curvature of the image side of the second lens group G3 and the radius of curvature of the object side of the third lens group G4, the propagation of the light beam in the second lens group G3 and the third lens group G4 is made smoother, which is beneficial to reducing aberration and thus improving the image quality of the optical lens 1.

[0246] In some embodiments, the optical lens 1 can satisfy: 1.2 < (L2 + L3) / CT1W < 2.4. Here, L2 is the length of the second lens group G3 along the optical axis direction, L3 is the length of the third lens group G4 along the optical axis direction, and CT1W is the interval between the second lens group G3 and the third lens group G4 along the optical axis direction at the short focal end. At this time, by reasonably configuring the thickness of the second lens group G3, the thickness of the third lens group G4, and the interval between the second lens group G3 and the third lens group G4, the light rays can pass through the second lens group G3 and the third lens group G4 more smoothly, which is beneficial to improving the optical quality and the imaging effect.

[0247] In some embodiments, the optical lens 1 can satisfy: 0.2 < |f4| / EFLT < 0.4. Here, f4 is the focal length of the movable lens group G2. At this time, by reasonably setting the focal length of the movable lens group G2, it is convenient to simplify the setting of the focal lengths of the second lens group G3 and the third lens group G4, so as to be easily adapted to the first lens group G1, simplify the design, and thus be beneficial to enabling the optical lens 1 to have a strong zooming ability.

[0248] For example, the value of |f4| / EFLT can be 0.2, 0.25, 0.3, 0.31, 0.32, 0.35, 0.39 or 0.4, etc.

[0249] In some embodiments, the optical lens 1 can satisfy: 0.2 < |f3| / EFLT < 0.3. Here, f3 is the focal length of the third lens group G4. At this time, by reasonably setting the focal length of the third lens group G4, it is beneficial to make the third lens group G4 easily adapted to the first lens group G1, and thus beneficial to enabling the optical lens 1 to have a strong zooming ability.

[0250] For example, the value of |f3| / EFLT can be 0.2, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.28 or 0.3, etc.

[0251] In some embodiments, the optical power of the last lens group of the optical lens 1 can be negative. For example, the optical power of the movable lens group G2 can be negative. The total optical power of the lenses preceding the last lens group can be positive, i.e., the total optical power of the first lens group G1, the second lens group G3, and the third lens group G4 is positive. This is beneficial for reducing the overall optical length of the optical lens 1.

[0252] For example, when the optical power of the first lens group G1 is positive, the optical power of the second lens group G3 can be negative, and the optical power of the third lens group G4 can be positive. When combined with the moving lens group G2, which has a negative optical power, the optical power of the optical lens 1 can be reasonably distributed, ensuring that the optical lens 1 has strong zoom capability and small total optical length, and can better balance the aberrations of the optical lens 1, so that the optical lens 1 has better image quality.

[0253] It is understandable that at the short focal length end, the distance between the moving lens group G2 and the second transition element 5 is CTW, and at the long focal length end, the distance between the moving lens group G2 and the second transition element 5 is CTT.

[0254] At this point, CT can be the difference between CTT and CTW. Optical lens 1 can satisfy: 3.5 < (R1W1 + R1T1) / (CTT - CTW) < 7.

[0255] Please see Figure 6 , Figure 6 yes Figure 4 The diagram shows a simplified structural representation of the camera module 30 in some other embodiments. Figure 6 The camera module 30 in the embodiment may include Figure 5 Most of the technical features of the embodiments are described below. For the same technical features, this embodiment will not repeat them. The following mainly describes the differences between the two.

[0256] Figure 6 The camera module 30 in the embodiment and Figure 5 The main difference in the camera module 30 of the embodiments lies in the arrangement of the second transition element 5 and the photosensitive element 2. In some embodiments, the light-emitting surface 53 of the second transition element 5 can be located on the same side of the optical axis of the movable lens group G2 as the first lens group G1. For example, the third direction is parallel to the optical axis of the first lens group G1, that is, the third direction is parallel to the first direction (Z direction). The light-emitting surface 53 of the second transition element 5 can be perpendicular to the third direction, that is, the light-emitting surface 53 of the second transition element 5 can be parallel to the light-incident surface 41 of the first transition element 4.

[0257] In this process, light can enter the second deflecting element 5 through the light-incident surface 51, be reflected by the reflective surface 52, and exit the optical element through the light-exiting surface 53.

[0258] In the optical axis direction of the first lens group G1, the highest point of the optical lens 1 is easily affected by the first lens group G1. At this time, light is emitted from the light-emitting surface 53 of the second deflection element 5 along the third direction. Since the light-emitting surface 53 and the first lens group G1 are located on the same side of the optical axis of the moving lens group G2, the imaging surface is also located on the same side of the optical axis of the third lens group G4 as the first lens group G1. This is equivalent to reusing the height space occupied by the first lens group G1 in its optical axis direction, so there is no need to reserve additional space for the imaging surface and the photosensitive element 2. This is beneficial for the position setting of the photosensitive element 2, which is beneficial for reducing the height of the optical lens 1 in the third direction and facilitating miniaturization design.

[0259] In this embodiment, by setting the second bending element 5, the optical path can be folded to reduce the total optical length (TTL) of the optical lens 1, thereby facilitating the miniaturization of the optical lens 1; in addition, the second bending element 5 can also facilitate the setting of the position of the imaging surface, thereby facilitating the setting of the position of the photosensitive element 2 in the camera module 30, and also facilitating the setting of a larger photosensitive element 2, thereby resulting in higher imaging quality.

[0260] Understandably, in the camera module 30, the photosensitive element 2 can be perpendicular to a third direction for better imaging. At this time, the light beam is emitted by the second deflection element 5 of the optical lens 1 and received by the photosensitive element 2, thereby forming an image.

[0261] Please see Figure 7 , Figure 7 yes Figure 4 The diagram shows a simplified structural representation of the camera module 30 in some embodiments. Figure 7 The camera module 30 in the embodiment may include Figure 5 Most of the technical features of the embodiments are described below. For the same technical features, this embodiment will not repeat them. The following mainly describes the differences between the two.

[0262] Figure 7 The camera module 30 in the embodiment and Figure 5 The main difference in the camera module 30 of the embodiments lies in the arrangement of the second deflection element 5 and the photosensitive element 2. In some embodiments, the light-emitting surface 53 of the second deflection element 5 may intersect with the optical axis of the movable lens group G2. Exemplarily, the third direction may intersect with the first direction, that is, the third direction has an angle with both the Z and Y directions. The light-emitting surface 53 may be perpendicular to the third direction.

[0263] In this process, light can enter the second deflecting element 5 through the light-incident surface 51, be reflected by the light-out surface 53 to the reflective surface 52, and then be reflected by the reflective surface 52 before exiting the optical lens 1 through the light-out surface 53.

[0264] In this embodiment, the light-emitting surface 53 is set at an angle, and the size of the optical lens 1 in the first direction has less restriction on the half-image height of the optical lens 1, which is beneficial for setting a larger half-image height and for obtaining higher quality images. In addition, the light undergoes multiple reflections in the second deflection element 5, and the second deflection element 5 folds the light, which is beneficial for shortening the total optical length.

[0265] The following will combine five examples. Figures 8 to 22c This application provides some specific, but not limiting, examples that will be described in more detail.

[0266] Example 1

[0267] Please refer to Tables 1a, 1b, 1c, and 1d, among which Table 1a is... Figure 8 The values ​​of the radius of curvature (R), thickness, effective focal length, refractive index (at a wavelength of 587.56 nm), and Abbe coefficient of each lens and reflector in another possible embodiment of the camera module 30 at the short focal length and long focal length ends are shown. The thickness includes the thickness of the structure itself and the spacing between the structures. Some parameters of the camera module 30 have different values ​​at the short focal length and long focal length ends; these values ​​are denoted by A to H, and the values ​​of A to H at the short focal length and long focal length ends are shown in Table 1b.

[0268] Tables 1c and 1d are... Figure 8 The camera module 30 shown in one possible embodiment displays the conic coefficient K and aspherical coefficient of each lens. Since the surface shape of the first lens L1 is variable, its conic coefficient K and aspherical coefficient values ​​are shown at the short focal length and long focal length ends, respectively. At the short focal length end, surface number 1 of the first lens L1 is represented by surface number 1a, and surface number 2 is represented by surface number 2a. At the long focal length end, surface number 1 of the first lens L1 is represented by surface number 1b, and surface number 2 is represented by surface number 2b.

[0269] Table 1a

[0270]

[0271] Table 1b

[0272] Short focal end Long focal end A 18.57 10.96 B -52.03 44.17 C 2.20 1.89 D 0.40 1.11 E 3.94 0.22 F 1.27 0.18 G 0.23 5.03 H 22.58 23.27

[0273] Table 1c

[0274] Surface number Conic constant K A2 A4 A6 A8 A10 A12 A14 1a 1.74E+00 0.00E+00 7.38E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2a -2.08E+01 0.00E+00 1.20E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1b -1.80E+00 0.00E+00 1.67E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2b -2.56E+01 0.00E+00 -9.60E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 5 6.37E-01 0.00E+00 -2.20E-03 -2.28E-04 5.14E-05 -4.20E-05 9.67E-06 -9.66E-07 6 -9.80E+01 0.00E+00 4.94E-03 3.10E-04 -2.50E-04 -3.66E-06 1.09E-05 -1.73E-06 7 -6.87E-01 0.00E+00 -3.00E-03 1.55E-03 -5.66E-04 1.12E-04 -1.12E-05 4.71E-07 8 1.51E+01 0.00E+00 -5.11E-04 -4.89E-04 1.91E-04 -3.31E-05 1.88E-06 2.93E-07 9 -6.39E+00 0.00E+00 -8.96E-03 2.89E-03 -5.80E-04 7.91E-05 -9.53E-06 1.10E-06 10 5.93E-04 0.00E+00 -2.31E-02 5.30E-03 -1.35E-03 2.44E-04 -3.02E-05 2.38E-06 11 -1.20E-02 0.00E+00 -3.73E-04 3.17E-04 -1.09E-04 1.88E-05 -1.55E-06 2.56E-08 12 -2.44E+01 0.00E+00 -1.72E-04 -1.11E-03 4.03E-04 -5.79E-05 3.45E-06 1.16E-08 13 1.99E-01 0.00E+00 4.00E-03 -5.13E-03 1.90E-03 -3.73E-04 4.26E-05 -2.85E-06 14 1.18E-02 0.00E+00 5.10E-03 -6.92E-03 2.49E-03 -3.88E-04 1.07E-05 5.14E-06 15 -2.67E-02 0.00E+00 -8.06E-04 -2.59E-03 8.00E-04 -5.22E-06 -4.36E-05 1.00E-05 16 9.80E+01 0.00E+00 -1.85E-03 1.11E-03 -4.85E-04 1.07E-04 -1.45E-05 1.22E-06 17 -4.21E+00 0.00E+00 -1.76E-03 2.08E-04 -1.59E-04 2.83E-05 -3.02E-06 1.63E-07 18 1.58E-01 0.00E+00 2.74E-05 -3.68E-04 1.45E-04 -4.48E-05 8.03E-06 -8.37E-07 19 -2.96E-03 0.00E+00 3.73E-02 -8.59E-03 2.27E-03 -5.03E-04 8.47E-05 -9.79E-06 20 -1.38E-02 0.00E+00 3.62E-02 -7.87E-03 1.80E-03 -3.17E-04 3.39E-05 8.35E-08 21 5.66E-04 0.00E+00 1.72E-02 -1.44E-02 5.49E-03 -1.47E-03 2.57E-04 -2.80E-05 22 1.99E+00 0.00E+00 3.08E-02 -3.14E-02 1.69E-02 -5.77E-03 1.29E-03 -1.92E-04 23 5.55E+01 0.00E+00 -2.53E-02 -7.30E-03 1.01E-02 -4.48E-03 1.12E-03 -1.76E-04 24 -4.52E+01 0.00E+00 -2.41E-02 9.55E-03 -2.70E-03 5.09E-04 -6.50E-05 5.58E-06

[0275] Table 1d

[0276]

[0277]

[0278] The aspherical surfaces in optical lens 1 in Tables 1a, 1b, 1c, and 1d can be defined using, but are not limited to, the following aspherical curve equations:

[0279]

[0280] 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 Tables 1b and 1c. The first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, tenth lens L10, and eleventh lens L11 are all aspherical lenses.

[0281] Please refer to Table 1e, which is... Figure 8 The basic parameters of the camera module 30 shown in one possible embodiment are as follows: 1MH is the half-image height, EFLT is the focal length of the optical lens 1 at the telephoto end, EFLW is the focal length of the optical lens 1 at the short focal length end, FNOT is the aperture value of the optical lens 1 at the telephoto end, FNOW is the aperture value of the optical lens 1 at the short focal length end, and HFOV is... T HFOV is the half field of view of optical lens 1 at the telephoto end. W F1w is the half field of view of optical lens 1 at the short focal length end, TTL is the total optical length of optical lens 1, TTH is the total optical height of optical lens 1, f1w is the focal length of the first lens group G1 at the short focal length end, f1t is the focal length of the first lens group G1 at the long focal length end, f2 is the focal length of the second lens group G3, f3 is the focal length of the third lens group G4, and f4 is the focal length of the moving lens group G2. The values ​​of f1w, f1t, f2, f3, f4, FNOT, and FNOW are all valid values.

[0282] Table 1e

[0283] IMH / mm 5.57 EFLT / mm 28.3 EFLW / mm 17.1 FNOT / mm 3.3 FNOW / mm 2.12 HFOV T / °]]> 11 HFOV W / °]]> 17.6 TTL / mm 27.3 TTH / mm 9 f1w / mm 22.58 f1t / mm 23.27 f2 / mm -9.66 f3 / mm 6.58 f4 / mm -9.04

[0284] Please see Figure 8 , Figure 8 yes Figure 4 The diagram shows the structure of the camera module 30 in some specific embodiments.

[0285] In this embodiment, the optical lens 1 includes a first lens group G1, a first transition element 4, a second lens group G3, a third lens group G4, and a movable lens group G2.

[0286] The first lens group G1, the first transition element 4, the second lens group G3, the third lens group G4, and the movable lens group G2 can be arranged sequentially from the object side to the image side. The second lens group G3, the third lens group G4, and the movable lens group G2 can be arranged along the optical axis of the second lens group G3, that is, the optical axes of the second lens group G3, the third lens group G4, and the movable lens group G2 can coincide; the optical axis of the first lens group G1 can be perpendicular to the optical axis of the second lens group G3.

[0287] The optical power of the first lens group G1 can be positive. The first lens group G1 may include a single-plane variable lens, namely the first lens L1.

[0288] The optical power of the second lens group G3 can be negative. The second lens group G3 may include three lenses: a second lens L2, a third lens L3, and a fourth lens L4. The second lens L2, the third lens L3, and the fourth lens L4 are arranged along the direction from the object side to the image side, and they can be relatively fixed. During zooming, the position of the second lens group G3 within the optical lens 1 can be fixed.

[0289] The optical power of the third lens group G4 can be positive. The third lens group G4 may include four lenses: a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. These lenses are arranged along the direction from the object side to the image side, and can be relatively fixed. The third lens group G4 is movable along the optical axis.

[0290] The optical power of the movable lens group G2 can be negative. The movable lens group G2 consists of three lenses: the ninth lens L9, the tenth lens L10, and the eleventh lens L11. These three lenses are arranged along the direction from the object side to the image side and can be relatively fixed. The movable lens group G2 can move along the optical axis.

[0291] The first deflection element 4 can be a prism. For example, the first deflection element 4 can include an incident light surface 41, a reflecting surface 42, and an exiting light surface 43. The incident light surface 41 can be perpendicular to the optical axis of the first lens group G1 and face the first lens group G1. The exiting light surface 43 can be perpendicular to the second lens group G3 and face the second lens group G3. The reflecting surface 42 receives the light beam from the incident light surface 41 and reflects it out through the exiting light surface 43, thereby changing the propagation direction of the light beam from the optical axis of the first lens group G1 to the optical axis of the second lens group G3. At this time, the optical axis of the first lens group G1 is the first direction, and the optical axis of the second lens group G3 is the second direction.

[0292] For example, the optical lens 1 may further include a second reversing element 5. The second reversing element 5 is located on the image side of the movable lens group G2. The second reversing element 5 may have an incident light surface 51, a reflecting surface 52, and an emitting light surface 53. The incident light surface 51 of the second reversing element 5 may be disposed facing the movable lens group G2. The emitting light surface 53 of the second reversing element 5 may be located on the same side of the optical axis of the movable lens group G2 as the first lens group G1. It is understood that in the camera module 30, the filter 3 and the photosensitive element 2 may face the emitting light surface 53 of the second reversing element 5 and be disposed parallel to the emitting light surface 53.

[0293] In this embodiment, during the process of changing the optical lens 1 from the short focal length end to the long focal length end, the surface shape of the first lens L1 changes, and the first lens L1 changes from the first focal length to the second focal length; the moving lens group G2 moves toward the third lens group G4, and the third lens group G4 moves toward the second lens group G3, that is, both the third lens group G4 and the moving lens group G2 move along the optical axis toward the object side; the optical lens 1 changes from the first lens focal length to the second lens focal length.

[0294] In this embodiment, by changing the surface shape of the variable-face lens, the curvature of the first lens group G1 is altered. Combined with the movement of the movable lens group G2, this changes the focal length of the optical lens 1, achieving lossless zoom. When the optical lens 1 captures external objects through its short focal length end, it has a shorter focal length and a wider field of view, facilitating the capture of close-up, wide-ranging objects with a prominent foreground. When the optical lens 1 captures external objects through its long focal length end, it has a longer focal length and a smaller field of view, facilitating the capture of details of distant objects and hard-to-reach subjects. The optical lens 1 has different focal lengths, enabling it to shoot at different focal lengths in different shooting scenarios, achieving optical zoom at different focal lengths—that is, lossless optical zoom. This results in higher quality images, better scene adaptability of the optical lens 1, and a significantly improved user shooting experience. Furthermore, it eliminates the need for multiple camera modules 30 in the electronic device to achieve different focal lengths, thus reducing the size of the camera module 30.

[0295] The first lens group G1 has a variable-format lens, allowing its focal length to be variable. The change in the focal length of the first lens group G1 has a significant impact on the focal length of the optical lens 1; that is, even a small change in the focal length of the first lens group G1 has a large effect on the focal length of the optical lens 1, thus facilitating a wide zoom range for the optical lens 1. Furthermore, the variable focal length capability of the first lens group G1, combined with the cooperation of the third lens group G4 and the movable lens group G2, enables the optical lens 1 to continuously and losslessly zoom between the first and second lens focal lengths, giving it strong zoom capabilities and high image quality at different focal lengths. By incorporating the first deflection element 4, the propagation direction of the light beam is altered, which helps reduce the size in the second direction, thereby reducing the length of the optical lens 1 and facilitating its miniaturization design.

[0296] By coordinating the optical power and focal length of the first lens group G1, the first transition element 4, the second lens group G3, the third lens group G4, and the moving lens group G2, the optical lens 1 has a strong zoom capability to perform a wide range of optical zoom; it also gives the optical lens 1 good image quality; and it gives the optical lens 1 a small length and volume.

[0297] The ratio of the field of view (FOVW) at the short focal length end to the field of view (FOVT) at the long focal length end of optical lens 1, i.e., FOVW / FOVT, is 1.6.

[0298] The zoom ratio EFLT / EFLW is 1.655.

[0299] The ratio of the first focal length f1w to the second focal length f1t of the first lens group G1, i.e., f1w / f1t, is 0.97. That is, the focal length of the first lens group G1 increases as it changes from the short focal length end to the long focal length end.

[0300] The ratio of the total optical length TTL to the sum of the focal lengths of the first lens EFLW and the second lens EFLT, i.e., TTL / (EFLT+EFLW), is 0.6.

[0301] The ratio of the second lens focal length EFLT to the half-image height I MH, i.e., EFLT / I MH, is 3.07.

[0302] Referring to Table 1b, during the transition of optical lens 1 from the short focal length end to the long focal length end, the radius of curvature (A) of the object side surface of the first lens L1 decreases from 18.57 mm to 10.96 mm. The radius of curvature (B) of the image side surface of the first lens L1 increases from -52.03 mm to 44.17 mm, with the reciprocal of the value increasing.

[0303] The sum of the radius of curvature R1W1 of the object side of the first lens L1 at the short focal length end and the radius of curvature R1T1 at the long focal length end, and the ratio of the distance CT that the moving lens group G2 moves from the short focal length end to the long focal length end, i.e., (R1W1+R1T1) / (CT), is 6.15. The value of CT is 4.8 mm.

[0304] The ratio of the radius of curvature R2L2 of the image side of the second lens group G3 to the radius of curvature R3L1 of the object side of the third lens group G4, i.e., R2L2 / R3L1, is 0.61.

[0305] The ratio of the sum of the length L2 of the second lens group G3 along the optical axis and the length L3 of the third lens group G4 along the optical axis to the distance CT1W between the second lens group G3 and the third lens group G4 at the short focal end along the optical axis, i.e., (L2+L3) / CT1W, is 1.52.

[0306] The ratio of the focal length of the moving lens group G2, |f4|, to the focal length of the second lens, i.e., |f4| / EFLT, is 0.32.

[0307] The ratio of the focal length |f3| of the third lens group G4 to the focal length of the second lens, i.e., |f3| / EFLW, is 0.23.

[0308] Please refer to the following: Figures 9a to 9c , Figure 9a yes Figure 8 The axial chromatic aberration curve of the camera module 30 shown in some embodiments is located at the short focal length end. Figure 9b yes Figure 8 The image astigmatism curve of the camera module 30 shown in some embodiments is located at the short focal length end. Figure 9c yes Figure 8 The image shown is a distortion diagram of the camera module 30 at the short focal length in some embodiments.

[0309] The axial chromatic aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (the illustration includes 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm). Its physical meaning is the deviation of light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the normalized coordinate at the pupil. Figure 9a The values ​​shown are all relatively small, indicating that the on-axis aberrations (spherical aberration, chromatic aberration, etc.) of optical lens 1 are well corrected. The astigmatism field curve is used to illustrate the deviation of the convergence point (image height) of the fine beam from the ideal imaging plane in different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When a value in a certain field of view is too large, the image quality of that field of view is poor or high-level aberrations exist. Figure 9bThe field curvature in both directions shown is small, indicating that the system has good depth of focus. The distortion diagram is used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height in different fields of view. Figure 9c All values ​​shown are within 2.5%, ensuring that there is no obvious distortion in the image.

[0310] Please refer to the following: Figures 10a to 10c , Figure 10a yes Figure 8 The axial chromatic aberration curve of the camera module 30 at the telephoto end in some embodiments is shown below. Figure 10b yes Figure 8 The image astigmatism curve of the camera module 30 at the telephoto end in some embodiments is shown below. Figure 10c yes Figure 8 The image shown is a distortion diagram of the camera module 30 at the telephoto end in some embodiments.

[0311] The axial chromatic aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (the illustration includes 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm). Its physical meaning is the deviation of light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the normalized coordinate at the pupil. Figure 10a The values ​​shown are all relatively small, indicating that the on-axis aberrations (spherical aberration, chromatic aberration, etc.) of optical lens 1 are well corrected. The astigmatism field curve is used to illustrate the deviation of the convergence point (image height) of the fine beam from the ideal imaging plane in different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When a value in a certain field of view is too large, the image quality of that field of view is poor or high-level aberrations exist. Figure 10b The field curvature in both directions shown is small, indicating that the system has good depth of focus. The distortion diagram is used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height in different fields of view. Figure 10c All values ​​shown are within 1%, ensuring that there is no obvious distortion in the image.

[0312] The camera module 30 provided in this embodiment has an optical lens 1 with a zoom ratio of 1.655, an optical total length TTL of 27.3 mm, a value of f1w / f1t of 0.97, a value of (R1W1+R1T1) / (CT) of 6.15, and a value of CT of 4.8 mm. The optical lens 1 has a small optical total length TTL at a large zoom ratio and has good imaging quality.

[0313] Example 2

[0314] Please refer to Tables 2a, 2b, 2c, and 2d, among which Table 2a is... Figure 11The values ​​of the radius of curvature (R), thickness, effective focal length, refractive index (at a wavelength of 587.56 nm), and Abbe coefficient of each lens and reflector in another possible embodiment of the camera module 30 at the short focal length and long focal length ends are shown. The thickness includes the thickness of the structure itself and the spacing between the structures. Some parameters of the camera module 30 have different values ​​at the short focal length and long focal length ends; these values ​​are denoted by A to H, and the values ​​of A to H at the short focal length and long focal length ends are shown in Table 2b.

[0315] Tables 2c and 2d are... Figure 11 The camera module 30 shown in one possible embodiment displays the conic coefficient K and aspherical coefficient of each lens. Since the surface shape of the first lens L1 is variable, its conic coefficient K and aspherical coefficient values ​​are shown at the short focal length and long focal length ends, respectively. At the short focal length end, surface number 1 of the first lens L1 is represented by surface number 1a, and surface number 2 is represented by surface number 2a. At the long focal length end, surface number 1 of the first lens L1 is represented by surface number 1b, and surface number 2 is represented by surface number 2b.

[0316] Table 2a

[0317]

[0318] Table 2b

[0319] Short focal end Long focal end A 23.22 11.32 B -95.30 25.74 C 1.58 1.55 D 0.16 0.45 E 4.41 0.11 F 1.09 0.07 G 0.18 5.50 H 28.02 28.93

[0320] Table 2c

[0321]

[0322]

[0323] Table 2d

[0324]

[0325]

[0326] The aspherical surfaces in optical lens 1 in Tables 2a, 2b, 2c, and 2d can be defined using, but are not limited to, the following aspherical curve equations:

[0327]

[0328] 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 Tables 2b and 2c. The first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, tenth lens L10, and eleventh lens L11 are all aspherical lenses.

[0329] Please refer to Table 2e, which is... Figure 11 The basic parameters of the camera module 30 shown in one possible embodiment are as follows: 1MH is the half-image height, EFLT is the focal length of the optical lens 1 at the telephoto end, EFLW is the focal length of the optical lens 1 at the short focal length end, FNOT is the aperture value of the optical lens 1 at the telephoto end, FNOW is the aperture value of the optical lens 1 at the short focal length end, and HFOV is... T HFOV is the half field of view of optical lens 1 at the telephoto end. W F1w is the half field of view of optical lens 1 at the short focal length end, TTL is the total optical length of optical lens 1, TTH is the total optical height of optical lens 1, f1w is the focal length of the first lens group G1 at the short focal length end, f1t is the focal length of the first lens group G1 at the long focal length end, f2 is the focal length of the second lens group G3, f3 is the focal length of the third lens group G4, and f4 is the focal length of the moving lens group G2. The values ​​of f1w, f1t, f2, f3, f4, FNOT, and FNOW are all valid values.

[0330] Table 2e

[0331] IMH / mm 5.57 EFLT / mm 28.3 EFLW / mm 17.1 FNOT / mm 3.3 FNOW / mm 2.13 HFOVT / ° 11.1 HFOVW / ° 17.6 TTL / mm 29.6 TTH / mm 9 f1w / mm 28.02 f1t / mm 28.93 f2 / mm -12.24 f3 / mm 6.87 f4 / mm -8.84

[0332] Please see Figure 11 , Figure 11 yes Figure 4 The diagram shows the structure of the camera module 30 in some other specific embodiments.

[0333] In this embodiment, the optical lens 1 includes a first lens group G1, a first transition element 4, a second lens group G3, a third lens group G4, and a movable lens group G2.

[0334] The first lens group G1, the first transition element 4, the second lens group G3, the third lens group G4, and the movable lens group G2 can be arranged sequentially from the object side to the image side. The second lens group G3, the third lens group G4, and the movable lens group G2 can be arranged along the optical axis of the second lens group G3, that is, the optical axes of the second lens group G3, the third lens group G4, and the movable lens group G2 can coincide; the optical axis of the first lens group G1 can be perpendicular to the optical axis of the second lens group G3.

[0335] The optical power of the first lens group G1 can be positive. The first lens group G1 may include a single-plane variable lens, namely the first lens L1.

[0336] The optical power of the second lens group G3 can be negative. The second lens group G3 may include three lenses: a second lens L2, a third lens L3, and a fourth lens L4. The second lens L2, the third lens L3, and the fourth lens L4 are arranged along the direction from the object side to the image side, and they can be relatively fixed. During zooming, the position of the second lens group G3 within the optical lens 1 can be fixed.

[0337] The optical power of the third lens group G4 can be positive. The third lens group G4 may include four lenses: a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. These lenses are arranged along the direction from the object side to the image side, and can be relatively fixed. The third lens group G4 is movable along the optical axis.

[0338] The optical power of the movable lens group G2 can be negative. The movable lens group G2 consists of three lenses: the ninth lens L9, the tenth lens L10, and the eleventh lens L11. These three lenses are arranged along the direction from the object side to the image side and can be relatively fixed. The movable lens group G2 can move along the optical axis.

[0339] The first deflection element 4 can be a prism. For example, the first deflection element 4 can include an incident light surface 41, a reflecting surface 42, and an exiting light surface 43. The incident light surface 41 can be perpendicular to the optical axis of the first lens group G1 and face the first lens group G1. The exiting light surface 43 can be perpendicular to the second lens group G3 and face the second lens group G3. The reflecting surface 42 receives the light beam from the incident light surface 41 and reflects it out through the exiting light surface 43, thereby changing the propagation direction of the light beam from the optical axis of the first lens group G1 to the optical axis of the second lens group G3. At this time, the optical axis of the first lens group G1 is the first direction, and the optical axis of the second lens group G3 is the second direction.

[0340] For example, the optical lens 1 may further include a second reversing element 5. The second reversing element 5 is located on the image side of the movable lens group G2. The second reversing element 5 may have an incident light surface 51, a reflecting surface 52, and an emitting light surface 53. The incident light surface 51 of the second reversing element 5 may be disposed facing the movable lens group G2. The emitting light surface 53 of the second reversing element 5 may be located on the same side of the optical axis of the movable lens group G2 as the first lens group G1. It is understood that in the camera module 30, the filter 3 and the photosensitive element 2 may face the emitting light surface 53 of the second reversing element 5 and be disposed parallel to the emitting light surface 53.

[0341] In this embodiment, during the process of changing the optical lens 1 from the short focal length end to the long focal length end, the surface shape of the first lens L1 changes, and the first lens L1 changes from the first focal length to the second focal length; the moving lens group G2 moves toward the third lens group G4, and the third lens group G4 moves toward the second lens group G3, that is, both the third lens group G4 and the moving lens group G2 move along the optical axis toward the object side; the optical lens 1 changes from the first lens focal length to the second lens focal length.

[0342] In this embodiment, by changing the surface shape of the variable-face lens, the curvature of the first lens group G1 is altered. Combined with the movement of the movable lens group G2, this changes the focal length of the optical lens 1, achieving lossless zoom. When the optical lens 1 captures external objects through its short focal length end, it has a shorter focal length and a wider field of view, facilitating the capture of close-up, wide-ranging objects with a prominent foreground. When the optical lens 1 captures external objects through its long focal length end, it has a longer focal length and a smaller field of view, facilitating the capture of details of distant objects and hard-to-reach subjects. The optical lens 1 has different focal lengths, enabling it to shoot at different focal lengths in different shooting scenarios, achieving optical zoom at different focal lengths—that is, lossless optical zoom. This results in higher quality images, better scene adaptability of the optical lens 1, and a significantly improved user shooting experience. Furthermore, it eliminates the need for multiple camera modules 30 in the electronic device to achieve different focal lengths, thus reducing the size of the camera module 30.

[0343] The first lens group G1 has a variable-format lens, allowing its focal length to be variable. The change in the focal length of the first lens group G1 has a significant impact on the focal length of the optical lens 1; that is, even a small change in the focal length of the first lens group G1 has a large effect on the focal length of the optical lens 1, thus facilitating a wide zoom range for the optical lens 1. Furthermore, the variable focal length capability of the first lens group G1, combined with the cooperation of the third lens group G4 and the movable lens group G2, enables the optical lens 1 to continuously and losslessly zoom between the first and second lens focal lengths, giving it strong zoom capabilities and high image quality at different focal lengths. By incorporating the first deflection element 4, the propagation direction of the light beam is altered, which helps reduce the size in the second direction, thereby reducing the length of the optical lens 1 and facilitating its miniaturization design.

[0344] By coordinating the optical power and focal length of the first lens group G1, the first transition element 4, the second lens group G3, the third lens group G4, and the moving lens group G2, the optical lens 1 has a strong zoom capability to perform a wide range of optical zoom; it also gives the optical lens 1 good image quality; and it gives the optical lens 1 a small length and volume.

[0345] Among them, the ratio of the field of view (FOVW) at the short focal length end of optical lens 1 to the field of view (FOVT) at the long focal length end, i.e., the value of FOVW / FOVT, is 1.59.

[0346] The zoom ratio EFLT / EFLW is 1.655.

[0347] The ratio of the first focal length f1w to the second focal length f1t of the first lens group G1, i.e., f1w / f1t, is 0.97. That is, the focal length of the first lens group G1 increases as it changes from the short focal length end to the long focal length end.

[0348] The ratio of the total optical length TTL to the sum of the focal lengths of the first lens EFLW and the second lens EFLT, i.e., TTL / (EFLT+EFLW), is 0.65.

[0349] The ratio of the second lens focal length EFLT to the half-image height IMH, i.e., EFLT / IMH, is 3.07.

[0350] Referring to Table 2b, during the transition of optical lens 1 from the short focal length end to the long focal length end, the radius of curvature (A) of the object side surface of the first lens L1 decreases from 23.22 mm to 11.32 mm. The radius of curvature (B) of the image side surface of the first lens L1 increases from -95.30 mm to 25.74 mm. The ratio of the sum of the radius of curvature R1W1 of the object side surface of the first lens L1 at the short focal length end and the radius of curvature R1T1 at the long focal length end to the distance CT that the moving lens group G2 moves from the short focal length end to the long focal length end, i.e., (R1W1+R1T1) / (CT), is 6.49. The value of CT is 5.32 mm.

[0351] The ratio of the radius of curvature R2L2 of the image side of the second lens group G3 to the radius of curvature R3L1 of the object side of the third lens group G4, i.e., R2L2 / R3L1, is 0.57.

[0352] The ratio of the sum of the length L2 of the second lens group G3 along the optical axis and the length L3 of the third lens group G4 along the optical axis to the distance CT1W between the second lens group G3 and the third lens group G4 at the short focal end along the optical axis, i.e., (L2+L3) / CT1W, is 1.39.

[0353] The ratio of the focal length of the moving lens group G2, |f4|, to the focal length of the second lens, i.e., |f4| / EFLT, is 0.31.

[0354] The ratio of the focal length |f3| of the third lens group G4 to the focal length of the second lens, i.e., |f3| / EFLW, is 0.24.

[0355] Please refer to the following: Figures 12a to 12c , Figure 12a yes Figure 11 The axial chromatic aberration curve of the camera module 30 shown in some embodiments is located at the short focal length end. Figure 12b yes Figure 11 The image astigmatism curve of the camera module 30 shown in some embodiments is located at the short focal length end. Figure 12c yes Figure 11 The image shown is a distortion diagram of the camera module 30 at the short focal length in some embodiments.

[0356] The axial chromatic aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (the illustration includes 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm). Its physical meaning is the deviation of light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the normalized coordinate at the pupil. Figure 12aThe values ​​shown are all relatively small, indicating that the on-axis aberrations (spherical aberration, chromatic aberration, etc.) of optical lens 1 are well corrected. The astigmatism field curve is used to illustrate the deviation of the convergence point (image height) of the fine beam from the ideal imaging plane in different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When a value in a certain field of view is too large, the image quality of that field of view is poor or high-level aberrations exist. Figure 12b The field curvature in both directions shown is small, indicating that the system has good depth of focus. The distortion diagram is used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height in different fields of view. Figure 12c All values ​​shown are within 2.5%, ensuring that there is no obvious distortion in the image.

[0357] Please refer to the following: Figures 13a to 13c , Figure 13a yes Figure 11 The axial chromatic aberration curve of the camera module 30 at the telephoto end in some embodiments is shown below. Figure 13b yes Figure 11 The image astigmatism curve of the camera module 30 at the telephoto end in some embodiments is shown below. Figure 13c yes Figure 11 The image shown is a distortion diagram of the camera module 30 at the telephoto end in some embodiments.

[0358] The axial chromatic aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (the illustration includes 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm). Its physical meaning is the deviation of light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the normalized coordinate at the pupil. Figure 13a The values ​​shown are all relatively small, indicating that the on-axis aberrations (spherical aberration, chromatic aberration, etc.) of optical lens 1 are well corrected. The astigmatism field curve is used to illustrate the deviation of the convergence point (image height) of the fine beam from the ideal imaging plane in different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When a value in a certain field of view is too large, the image quality of that field of view is poor or high-level aberrations exist. Figure 13b The field curvature in both directions shown is small, indicating that the system has good depth of focus. The distortion diagram is used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height in different fields of view. Figure 13c All values ​​shown are within 0.5%, ensuring that there is no obvious distortion in the image.

[0359] The camera module 30 provided in this embodiment has an optical lens 1 with a zoom ratio of 1.655, an optical total length TTL of 29.6 mm, a value of f1w / f1t of 0.97, a value of (R1W1+R1T1) / (CT) of 6.49, and a value of CT of 5.32 mm. The optical lens 1 has a small optical total length TTL at a large zoom ratio and has good imaging quality.

[0360] Example 3

[0361] Please refer to Tables 3a, 3b, 3c, and 3d, among which Table 3a is... Figure 14 The values ​​of the radius of curvature (R), thickness, effective focal length, refractive index (at a wavelength of 587.56 nm), and Abbe coefficient of each lens and reflector in another possible embodiment of the camera module 30 at the short focal length and long focal length ends are shown. The thickness includes the thickness of the structure itself and the spacing between the structures. Some parameters of the camera module 30 have different values ​​at the short focal length and long focal length ends; these values ​​are denoted by A to I, and the values ​​of A to I at the short focal length and long focal length ends are shown in Table 3b.

[0362] Tables 3c and 3d are... Figure 14 The camera module 30 shown in one possible embodiment displays the conic coefficient K and aspherical coefficient of each lens. Since the surface shape of the first lens L1 is variable, its conic coefficient K and aspherical coefficient values ​​are shown at the short focal length and long focal length ends, respectively. At the short focal length end, surface number 1 of the first lens L1 is represented by surface number 1a, and surface number 2 is represented by surface number 2a. At the long focal length end, surface number 1 of the first lens L1 is represented by surface number 1b, and surface number 2 is represented by surface number 2b.

[0363] Table 3a

[0364]

[0365] Table 3b

[0366]

[0367]

[0368] Table 3c

[0369] Surface number Conic constant K A2 A4 A6 A8 A10 A12 A14 1a 1.79E+00 0.00E+00 1.80E-05 -5.62E-07 7.40E-09 0.00E+00 0.00E+00 0.00E+00 2a 1.65E+00 0.00E+00 2.00E-05 -8.04E-07 1.11E-08 0.00E+00 0.00E+00 0.00E+00 1b -2.98E+00 0.00E+00 8.32E-05 -3.28E-06 -1.78E-07 0.00E+00 0.00E+00 0.00E+00 2b -1.23E+01 0.00E+00 8.89E-05 -1.49E-05 4.72E-08 0.00E+00 0.00E+00 0.00E+00 5 -3.09E+01 0.00E+00 -6.89E-05 -2.17E-03 8.82E-04 -1.85E-04 2.17E-05 -1.45E-06 6 1.18E+00 0.00E+00 2.19E-03 -2.97E-03 1.29E-03 -2.68E-04 3.00E-05 -1.84E-06 7 -1.40E+01 0.00E+00 -2.76E-03 2.41E-03 -9.99E-04 2.44E-04 -3.77E-05 3.75E-06 8 7.92E+00 0.00E+00 -2.31E-03 2.37E-03 -9.91E-04 2.18E-04 -2.78E-05 2.05E-06 9 -7.98E+01 0.00E+00 3.21E-03 -3.03E-03 1.39E-03 -3.58E-04 5.83E-05 -6.20E-06 10 -3.62E+01 0.00E+00 5.82E-03 -3.57E-03 1.30E-03 -3.06E-04 4.67E-05 -4.63E-06 11 1.05E+00 0.00E+00 -4.75E-03 5.46E-04 -1.38E-04 1.95E-05 -1.02E-06 -6.78E-08 12 9.15E+01 0.00E+00 6.60E-03 -4.23E-03 9.43E-04 -1.08E-04 6.23E-06 -1.03E-07 13 9.51E+01 0.00E+00 5.29E-03 -4.13E-03 1.10E-03 -1.59E-04 1.35E-05 -6.84E-07 14 1.14E-01 0.00E+00 -8.18E-03 1.91E-03 -6.73E-04 1.82E-04 -3.03E-05 3.06E-06 15 -2.22E-01 0.00E+00 -1.77E-03 1.74E-03 -9.83E-04 2.83E-04 -4.68E-05 4.61E-06 16 9.80E+01 0.00E+00 -3.25E-03 -4.34E-04 3.36E-04 -7.82E-05 9.37E-06 -6.80E-07 17 -2.11E+00 0.00E+00 -6.98E-03 -3.05E-05 2.80E-04 -5.97E-05 4.86E-06 -3.05E-08 18 1.32E-01 0.00E+00 -3.47E-04 -1.64E-04 6.54E-05 -1.19E-05 1.22E-06 -7.29E-08 19 -1.04E+00 0.00E+00 5.27E-02 -1.94E-02 6.83E-03 -1.84E-03 3.60E-04 -4.97E-05 20 -1.03E+00 0.00E+00 4.74E-02 -1.62E-02 4.52E-03 -4.22E-04 -2.20E-04 1.11E-04 21 -2.09E-10 0.00E+00 3.37E-03 -7.08E-03 2.86E-03 -4.62E-04 1.60E-05 5.81E-06 22 -7.38E+00 0.00E+00 8.15E-03 -9.72E-03 3.72E-03 -5.25E-04 -9.61E-05 7.27E-05 23 8.25E+01 0.00E+00 -2.61E-02 -1.37E-04 2.50E-03 -9.92E-04 2.32E-04 -3.88E-05 24 -5.58E+00 0.00E+00 -3.14E-02 6.51E-03 -6.03E-04 -7.37E-05 3.18E-05 -4.67E-06

[0370] Table 3d

[0371]

[0372]

[0373] The aspherical surfaces in optical lens 1 in Tables 3a, 3b, 3c, and 3d can be defined using, but are not limited to, the following aspherical curve equations:

[0374]

[0375] 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 Tables 3b and 3c. The first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, tenth lens L10, and eleventh lens L11 are all aspherical lenses.

[0376] Please refer to Table 3e, which is... Figure 14 The basic parameters of the camera module 30 shown in one possible embodiment are as follows: 1MH is the half-image height, EFLT is the focal length of the optical lens 1 at the telephoto end, EFLW is the focal length of the optical lens 1 at the short focal length end, FNOT is the aperture value of the optical lens 1 at the telephoto end, FNOW is the aperture value of the optical lens 1 at the short focal length end, and HFOV is... T HFOV is the half field of view of optical lens 1 at the telephoto end. W F1w is the half field of view of optical lens 1 at the short focal length end, TTL is the total optical length of optical lens 1, TTH is the total optical height of optical lens 1, f1w is the focal length of the first lens group G1 at the short focal length end, f1t is the focal length of the first lens group G1 at the long focal length end, f2 is the focal length of the second lens group G3, f3 is the focal length of the third lens group G4, and f4 is the focal length of the moving lens group G2. The values ​​of f1w, f1t, f2, f3, f4, FNOT, and FNOW are all valid values.

[0377] Table 3e

[0378] IMH / mm 5.57 EFLT / mm 28.3 EFLW / mm 17.1 FNOT / mm 3.3 FNOW / mm 2.12 HFOVT / ° 11.1 HFOVW / ° 17.7 TTL / mm 30 TTH / mm 9 f1w / mm 52.64 f1t / mm 36.14 f2 / mm -26.76 f3 / mm 6.17 f4 / mm -5.67

[0379] Please see Figure 14 , Figure 14 yes Figure 4 The diagram shows the structure of the camera module 30 in some specific embodiments.

[0380] In this embodiment, the optical lens 1 includes a first lens group G1, a first transition element 4, a second lens group G3, a third lens group G4, and a movable lens group G2.

[0381] The first lens group G1, the first transition element 4, the second lens group G3, the third lens group G4, and the movable lens group G2 can be arranged sequentially from the object side to the image side. The second lens group G3, the third lens group G4, and the movable lens group G2 can be arranged along the optical axis of the second lens group G3, that is, the optical axes of the second lens group G3, the third lens group G4, and the movable lens group G2 can coincide; the optical axis of the first lens group G1 can be perpendicular to the optical axis of the second lens group G3.

[0382] The optical power of the first lens group G1 can be positive. The first lens group G1 may include a single-plane variable lens, namely the first lens L1.

[0383] The optical power of the second lens group G3 can be negative. The second lens group G3 may include three lenses: a second lens L2, a third lens L3, and a fourth lens L4. The second lens L2, the third lens L3, and the fourth lens L4 are arranged along the direction from the object side to the image side, and the three can be relatively fixed. The second lens group G3 can move along the optical axis.

[0384] The optical power of the third lens group G4 can be positive. The third lens group G4 may include four lenses: a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. These lenses are arranged along the direction from the object side to the image side, and can be relatively fixed. The third lens group G4 is movable along the optical axis.

[0385] The optical power of the movable lens group G2 can be negative. The movable lens group G2 consists of three lenses: the ninth lens L9, the tenth lens L10, and the eleventh lens L11. These three lenses are arranged along the direction from the object side to the image side and can be relatively fixed. The movable lens group G2 can move along the optical axis.

[0386] The first deflection element 4 can be a prism. For example, the first deflection element 4 can include an incident light surface 41, a reflecting surface 42, and an exiting light surface 43. The incident light surface 41 can be perpendicular to the optical axis of the first lens group G1 and face the first lens group G1. The exiting light surface 43 can be perpendicular to the second lens group G3 and face the second lens group G3. The reflecting surface 42 receives the light beam from the incident light surface 41 and reflects it out through the exiting light surface 43, thereby changing the propagation direction of the light beam from the optical axis of the first lens group G1 to the optical axis of the second lens group G3. At this time, the optical axis of the first lens group G1 is the first direction, and the optical axis of the second lens group G3 is the second direction.

[0387] For example, the optical lens 1 may further include a second reversing element 5. The second reversing element 5 is located on the image side of the movable lens group G2. The second reversing element 5 may have an incident light surface 51, a reflecting surface 52, and an emitting light surface 53. The incident light surface 51 of the second reversing element 5 may be disposed facing the movable lens group G2. The emitting light surface 53 of the second reversing element 5 may be located on the same side of the optical axis of the movable lens group G2 as the first lens group G1. It is understood that in the camera module 30, the filter 3 and the photosensitive element 2 may face the emitting light surface 53 of the second reversing element 5 and be disposed parallel to the emitting light surface 53.

[0388] In this embodiment, during the process of changing the optical lens 1 from the short focal length end to the long focal length end, the surface shape of the first lens L1 changes, and the first lens L1 changes from the first focal length to the second focal length; the second lens group G3 moves toward the first turning element 4, the third lens group G4 moves toward the second lens group G3, and the moving lens group G2 moves toward the third lens group G4. That is, the second lens group G3, the third lens group G4 and the moving lens group G2 all move toward the object side along the optical axis; the optical lens 1 changes from the first lens focal length to the second lens focal length.

[0389] In this embodiment, by changing the surface shape of the variable-face lens, the curvature of the first lens group G1 is altered. Combined with the movement of the movable lens group G2, this changes the focal length of the optical lens 1, achieving lossless zoom. When the optical lens 1 captures external objects through its short focal length end, it has a shorter focal length and a wider field of view, facilitating the capture of close-up, wide-ranging objects with a prominent foreground. When the optical lens 1 captures external objects through its long focal length end, it has a longer focal length and a smaller field of view, facilitating the capture of details of distant objects and hard-to-reach subjects. The optical lens 1 has different focal lengths, enabling it to shoot at different focal lengths in different shooting scenarios, achieving optical zoom at different focal lengths—that is, lossless optical zoom. This results in higher quality images, better scene adaptability of the optical lens 1, and a significantly improved user shooting experience. Furthermore, it eliminates the need for multiple camera modules 30 in the electronic device to achieve different focal lengths, thus reducing the size of the camera module 30.

[0390] The first lens group G1 has a variable-format lens, enabling its focal length to be variable. The change in the focal length of the first lens group G1 has a significant impact on the focal length of the optical lens 1; that is, even a small change in the focal length of the first lens group G1 has a large effect on the focal length of the optical lens 1, thus facilitating a wide zoom range for the optical lens 1. Furthermore, the variable focal length capability of the first lens group G1, combined with the cooperation of the second lens group G3, the third lens group G4, and the movable lens group G2, allows the optical lens 1 to continuously and losslessly zoom between the first and second lens focal lengths, giving it strong zoom capabilities and high image quality at different focal lengths. By incorporating the first deflection element 4, the propagation direction of the light beam is altered, which helps reduce the size in the second direction, thereby reducing the length of the optical lens 1 and facilitating its miniaturization design.

[0391] By coordinating the optical power and focal length of the first lens group G1, the first transition element 4, the second lens group G3, the third lens group G4, and the moving lens group G2, the optical lens 1 has a strong zoom capability to perform a wide range of optical zoom; it also gives the optical lens 1 good image quality; and it gives the optical lens 1 a small length and volume.

[0392] Among them, the ratio of the field of view (FOVW) at the short focal length end of optical lens 1 to the field of view (FOVT) at the long focal length end, i.e., the value of FOVW / FOVT, is 1.59.

[0393] The zoom ratio EFLT / EFLW is 1.655.

[0394] The ratio of the first focal length f1w to the second focal length f1t of the first lens group G1, i.e., f1w / f1t, is 1.46. That is, the focal length of the first lens group G1 decreases as it changes from the short focal length end to the long focal length end.

[0395] The ratio of the total optical length TTL to the sum of the focal lengths of the first lens EFLW and the second lens EFLT, i.e., TTL / (EFLT+EFLW), is 0.66.

[0396] The ratio of the second lens focal length EFLT to the half-image height IMH, i.e., EFLT / IMH, is 3.07.

[0397] Referring to Table 3b, during the transition of optical lens 1 from the short focal length end to the long focal length end, the radius of curvature (A) of the object side surface of the first lens L1 decreases from 19.33 mm to 9.27 mm. The radius of curvature (B) of the image side surface of the first lens L1 decreases from 34.95 mm to 12.84 mm, with the reciprocal of the value increasing.

[0398] The ratio of the sum of the radius of curvature R1W1 of the object side of the first lens L1 at the short focal length end and the radius of curvature R1T1 at the long focal length end to the distance CT that the moving lens group G2 moves from the short focal length end to the long focal length end, i.e., (R1W1+R1T1) / (CT), is 3.88. The value of CT is 7.37 mm.

[0399] The ratio of the radius of curvature R2L2 of the image side of the second lens group G3 to the radius of curvature R3L1 of the object side of the third lens group G4, i.e., R2L2 / R3L1, is 1.05.

[0400] The ratio of the sum of the length L2 of the second lens group G3 along the optical axis and the length L3 of the third lens group G4 along the optical axis to the distance CT1W between the second lens group G3 and the third lens group G4 at the short focal end along the optical axis, i.e., (L2+L3) / CT1W, is 2.

[0401] The ratio of the focal length |f4| of the moving lens group G2 to the focal length of the second lens, i.e., |f4| / EFLT, is 0.2.

[0402] The ratio of the focal length |f3| of the third lens group G4 to the focal length of the second lens, i.e., |f3| / EFLW, is 0.22.

[0403] Please refer to the following: Figures 15a to 15c , Figure 15a yes Figure 14 The axial chromatic aberration curve of the camera module 30 shown in some embodiments is located at the short focal length end. Figure 15b yes Figure 14 The image astigmatism curve of the camera module 30 shown in some embodiments is located at the short focal length end. Figure 15c yes Figure 14 The image shown is a distortion diagram of the camera module 30 at the short focal length in some embodiments.

[0404] The axial chromatic aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (the illustration includes 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm). Its physical meaning is the deviation of light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the normalized coordinate at the pupil. Figure 15a The values ​​shown are all relatively small, indicating that the on-axis aberrations (spherical aberration, chromatic aberration, etc.) of optical lens 1 are well corrected. The astigmatism field curve is used to illustrate the deviation of the convergence point (image height) of the fine beam from the ideal imaging plane in different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When a value in a certain field of view is too large, the image quality of that field of view is poor or high-level aberrations exist. Figure 15bThe field curvature in both directions shown is small, indicating that the system has good depth of focus. The distortion diagram is used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height in different fields of view. Figure 15c All values ​​shown are within 2%, ensuring that there is no obvious distortion in the image.

[0405] Please refer to the following: Figures 16a to 16c , Figure 16a yes Figure 14 The axial chromatic aberration curve of the camera module 30 at the telephoto end in some embodiments is shown below. Figure 16b yes Figure 14 The image astigmatism curve of the camera module 30 at the telephoto end in some embodiments is shown below. Figure 16c yes Figure 14 The image shown is a distortion diagram of the camera module 30 at the telephoto end in some embodiments.

[0406] The axial chromatic aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (the illustration includes 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm). Its physical meaning is the deviation of light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the normalized coordinate at the pupil. Figure 16a The values ​​shown are all relatively small, indicating that the on-axis aberrations (spherical aberration, chromatic aberration, etc.) of optical lens 1 are well corrected. The astigmatism field curve is used to illustrate the deviation of the convergence point (image height) of the fine beam from the ideal imaging plane in different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When a value in a certain field of view is too large, the image quality of that field of view is poor or high-level aberrations exist. Figure 16b The field curvature in both directions shown is small, indicating that the system has good depth of focus. The distortion diagram is used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height in different fields of view. Figure 16c All values ​​shown are within 0.5%, ensuring that there is no obvious distortion in the image.

[0407] The camera module 30 provided in this embodiment has an optical lens 1 with a zoom ratio of 1.655, an optical total length TTL of 30 mm, a value of f1w of 52.64 mm, a value of f1t of 36.14 mm, a value of f1w / f1t of 1.46, a value of (R1W1+R1T1) / (CT) of 3.88, and a value of CT of 7.37 mm. The first lens group G1 does not need to have a large curvature, the zoom burden is small, the optical lens 1 has a small optical total length TTL under a large zoom ratio, and the optical lens 1 has good imaging quality.

[0408] Example 4

[0409] Please refer to Tables 4a, 4b, 4c, and 4d, among which Table 4a is... Figure 17 The values ​​of the radius of curvature (R), thickness, effective focal length, refractive index (at a wavelength of 587.56 nm), and Abbe coefficient of each lens and reflector in another possible embodiment of the camera module 30 at the short focal length and long focal length ends are shown. The thickness includes the thickness of the structure itself and the spacing between the structures. Some parameters of the camera module 30 have different values ​​at the short focal length and long focal length ends; these values ​​are denoted by A to H, and the values ​​of A to H at the short focal length and long focal length ends are shown in Table 4b.

[0410] Tables 4c and 4d are... Figure 17 The camera module 30 shown in one possible embodiment displays the conic coefficient K and aspherical coefficient of each lens. Since the surface shape of the first lens L1 is variable, its conic coefficient K and aspherical coefficient values ​​are shown at the short focal length and long focal length ends, respectively. At the short focal length end, surface number 1 of the first lens L1 is represented by surface number 1a, and surface number 2 is represented by surface number 2a. At the long focal length end, surface number 1 of the first lens L1 is represented by surface number 1b, and surface number 2 is represented by surface number 2b.

[0411] Table 4a

[0412]

[0413] Table 4b

[0414]

[0415]

[0416] Table 4c

[0417] Surface number Conic constant K A2 A4 A6 A8 A10 A12 A14 1a 2a 1b 2b 5 0.00E+00 0.00E+00 4.27E-03 -1.16E-03 3.88E-04 -9.74E-05 1.38E-05 -1.08E-06 6 0.00E+00 0.00E+00 1.44E-02 -4.49E-03 1.23E-03 -2.50E-04 3.22E-05 -2.47E-06 7 0.00E+00 0.00E+00 4.36E-03 -1.55E-03 1.35E-04 3.81E-05 -1.08E-05 1.12E-06 8 0.00E+00 0.00E+00 1.95E-03 1.72E-04 -5.69E-04 2.18E-04 -3.88E-05 3.69E-06 9 0.00E+00 0.00E+00 -3.38E-03 -1.36E-05 -5.91E-05 4.24E-05 -9.59E-06 1.07E-06 10 0.00E+00 0.00E+00 -1.23E-02 1.33E-03 -1.44E-04 5.58E-06 1.09E-06 -1.99E-07 11 0.00E+00 0.00E+00 -1.90E-04 9.58E-05 -3.37E-05 9.16E-06 -1.80E-06 2.24E-07 12 0.00E+00 0.00E+00 -5.31E-03 1.57E-03 -2.90E-04 3.82E-05 -3.30E-06 1.70E-07 13 0.00E+00 0.00E+00 -3.10E-03 6.07E-04 -2.38E-04 7.63E-05 -1.42E-05 1.53E-06 14 0.00E+00 0.00E+00 -2.45E-03 3.48E-04 -5.63E-04 2.61E-04 -5.80E-05 7.01E-06 15 0.00E+00 0.00E+00 -5.17E-03 6.17E-04 -3.74E-04 1.71E-04 -4.06E-05 5.22E-06 16 0.00E+00 0.00E+00 8.68E-04 -1.84E-03 8.21E-04 -2.27E-04 3.64E-05 -3.39E-06 17 0.00E+00 0.00E+00 3.15E-03 -3.42E-03 1.53E-03 -4.24E-04 6.71E-05 -6.00E-06 18 0.00E+00 0.00E+00 3.79E-03 -2.89E-03 1.41E-03 -4.25E-04 7.79E-05 -8.87E-06 19 0.00E+00 0.00E+00 2.51E-02 -4.74E-03 9.21E-04 -9.21E-05 -9.60E-06 5.10E-06 20 0.00E+00 0.00E+00 2.34E-02 -4.20E-03 5.45E-04 6.50E-05 -4.90E-05 1.12E-05 21 0.00E+00 0.00E+00 3.33E-04 -5.17E-03 1.60E-03 -4.20E-04 1.14E-04 -2.63E-05 22 0.00E+00 0.00E+00 -8.71E-05 -5.53E-03 1.41E-03 -1.17E-04 -1.23E-05 2.30E-06 23 0.00E+00 0.00E+00 -3.87E-02 1.02E-02 -3.22E-03 1.06E-03 -2.64E-04 4.13E-05 24 0.00E+00 0.00E+00 -4.25E-02 1.42E-02 -4.77E-03 1.48E-03 -3.90E-04 8.03E-05

[0418] Table 4d

[0419]

[0420]

[0421] The aspherical surfaces in optical lens 1 in Tables 4a, 4b, 4c, and 4d can be defined using, but are not limited to, the following aspherical curve equations:

[0422]

[0423] 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 Tables 4b and 4c. The first lens L1 is a spherical mirror and does not have a conic coefficient K or an aspherical coefficient; the second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, tenth lens L10, and eleventh lens L11 are all aspherical mirrors.

[0424] Please refer to Table 4e, which is... Figure 17 The basic parameters of the camera module 30 shown in one possible embodiment are as follows: 1MH is the half-image height, EFLT is the focal length of the optical lens 1 at the telephoto end, EFLW is the focal length of the optical lens 1 at the short focal length end, FNOT is the aperture value of the optical lens 1 at the telephoto end, FNOW is the aperture value of the optical lens 1 at the short focal length end, and HFOV is... T HFOV is the half field of view of optical lens 1 at the telephoto end. W F1w is the half field of view of optical lens 1 at the short focal length end, TTL is the total optical length of optical lens 1, TTH is the total optical height of optical lens 1, f1w is the focal length of the first lens group G1 at the short focal length end, f1t is the focal length of the first lens group G1 at the long focal length end, f2 is the focal length of the second lens group G3, f3 is the focal length of the third lens group G4, and f4 is the focal length of the moving lens group G2. The values ​​of f1w, f1t, f2, f3, f4, FNOT, and FNOW are all valid values.

[0425] Table 4e

[0426]

[0427]

[0428] Please see Figure 17 , Figure 17 yes Figure 4 The diagram shows the structure of the camera module 30 in some specific embodiments.

[0429] In this embodiment, the optical lens 1 includes a first lens group G1, a first transition element 4, a second lens group G3, a third lens group G4, and a movable lens group G2.

[0430] The first lens group G1, the first transition element 4, the second lens group G3, the third lens group G4, and the movable lens group G2 can be arranged sequentially from the object side to the image side. The second lens group G3, the third lens group G4, and the movable lens group G2 can be arranged along the optical axis of the second lens group G3, that is, the optical axes of the second lens group G3, the third lens group G4, and the movable lens group G2 can coincide; the optical axis of the first lens group G1 can be perpendicular to the optical axis of the second lens group G3.

[0431] The optical power of the first lens group G1 can be positive. The first lens group G1 may include a single-plane variable lens, namely the first lens L1.

[0432] The optical power of the second lens group G3 can be negative. The second lens group G3 may include three lenses: a second lens L2, a third lens L3, and a fourth lens L4. The second lens L2, the third lens L3, and the fourth lens L4 are arranged along the direction from the object side to the image side, and they can be relatively fixed. During zooming, the position of the second lens group G3 within the optical lens 1 can be fixed.

[0433] The optical power of the third lens group G4 can be positive. The third lens group G4 may include four lenses: a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. These lenses are arranged along the direction from the object side to the image side, and can be relatively fixed. The third lens group G4 is movable along the optical axis.

[0434] The optical power of the movable lens group G2 can be negative. The movable lens group G2 consists of three lenses: the ninth lens L9, the tenth lens L10, and the eleventh lens L11. These three lenses are arranged along the direction from the object side to the image side and can be relatively fixed. The movable lens group G2 can move along the optical axis.

[0435] The first deflection element 4 can be a prism. For example, the first deflection element 4 may include an incident light surface 41, a reflecting surface 42, and an exiting light surface 43. The incident light surface may be perpendicular to the optical axis of the first lens group G1 and face the first lens group G1. The exiting light surface may be perpendicular to the second lens group G3 and face the second lens group G3. The reflecting surface receives the light beam from the incident light surface and reflects it out through the exiting light surface, thereby changing the propagation direction of the light beam from the optical axis of the first lens group G1 to the optical axis of the second lens group G3. At this time, the optical axis of the first lens group G1 is the first direction, and the optical axis of the second lens group G3 is the second direction.

[0436] For example, the optical lens 1 may further include a second reversing element 5. The second reversing element 5 is located on the image side of the movable lens group G2. The second reversing element 5 may have an incident light surface, a reflecting surface, and an emitting light surface. The incident light surface of the second reversing element 5 may be positioned towards the movable lens group G2. The emitting light surface of the second reversing element 5 may be located on the same side of the optical axis of the movable lens group G2 as the first lens group G1. It is understood that in the camera module 30, the filter 3 and the photosensitive element 2 may be positioned towards and parallel to the emitting light surface of the second reversing element 5.

[0437] In this embodiment, during the process of changing the optical lens 1 from the short focal length end to the long focal length end, the surface shape of the first lens L1 changes, and the first lens L1 changes from the first focal length to the second focal length; the moving lens group G2 moves toward the third lens group G4, and the third lens group G4 moves toward the second lens group G3, that is, both the third lens group G4 and the moving lens group G2 move along the optical axis toward the object side; the optical lens 1 changes from the first lens focal length to the second lens focal length.

[0438] In this embodiment, by changing the surface shape of the variable-face lens, the curvature of the first lens group G1 is altered. Combined with the movement of the movable lens group G2, this changes the focal length of the optical lens 1, achieving lossless zoom. When the optical lens 1 captures external objects through its short focal length end, it has a shorter focal length and a wider field of view, facilitating the capture of close-up, wide-ranging objects with a prominent foreground. When the optical lens 1 captures external objects through its long focal length end, it has a longer focal length and a smaller field of view, facilitating the capture of details of distant objects and hard-to-reach subjects. The optical lens 1 has different focal lengths, enabling it to shoot at different focal lengths in different shooting scenarios, achieving optical zoom at different focal lengths—that is, lossless optical zoom. This results in higher quality images, better scene adaptability of the optical lens 1, and a significantly improved user shooting experience. Furthermore, it eliminates the need for multiple camera modules 30 in the electronic device to achieve different focal lengths, thus reducing the size of the camera module 30.

[0439] The first lens group G1 has a variable-format lens, allowing its focal length to be variable. The change in the focal length of the first lens group G1 has a significant impact on the focal length of the optical lens 1; that is, even a small change in the focal length of the first lens group G1 has a large effect on the focal length of the optical lens 1, thus facilitating a wide zoom range for the optical lens 1. Furthermore, the variable focal length capability of the first lens group G1, combined with the cooperation of the third lens group G4 and the movable lens group G2, enables the optical lens 1 to continuously and losslessly zoom between the first and second lens focal lengths, giving it strong zoom capabilities and high image quality at different focal lengths. By incorporating the first deflection element 4, the propagation direction of the light beam is altered, which helps reduce the size in the second direction, thereby reducing the length of the optical lens 1 and facilitating its miniaturization design.

[0440] By coordinating the optical power and focal length of the first lens group G1, the first transition element 4, the second lens group G3, the third lens group G4, and the moving lens group G2, the optical lens 1 has a strong zoom capability to perform a wide range of optical zoom; it also gives the optical lens 1 good image quality; and it gives the optical lens 1 a small length and volume.

[0441] Among them, the ratio of the field of view (FOVW) at the short focal length end of optical lens 1 to the field of view (FOVT) at the long focal length end, i.e., the value of FOVW / FOVT, is 1.67.

[0442] The zoom ratio EFLT / EFLW is 1.655.

[0443] The ratio of the first focal length f1w to the second focal length f1t of the first lens group G1, i.e., f1w / f1t, is 0.95. This means that the focal length of the first lens group G1 increases as it changes from the short focal length to the long focal length.

[0444] The ratio of the total optical length TTL to the sum of the focal lengths of the first lens EFLW and the second lens EFLT, i.e., TTL / (EFLT+EFLW), is 0.62.

[0445] The ratio of the second lens focal length EFLT to the half-image height IMH, i.e., EFLT / IMH, is 3.07.

[0446] Referring to Table 4b, during the transition of optical lens 1 from the short focal length end to the long focal length end, the radius of curvature (A) of the object side surface of the first lens L1 decreases from 18.86 mm to 12.08 mm. The radius of curvature (B) of the image side surface of the first lens L1 decreases from -188.95 mm to 34.58 mm, and the reciprocal of its value increases.

[0447] The ratio of the sum of the radius of curvature R1W1 of the object side of the first lens L1 at the short focal length end and the radius of curvature R1T1 at the long focal length end to the distance CT that the moving lens group G2 moves from the short focal length end to the long focal length end, i.e., (R1W1+R1T1) / (CT), is 5.75. The value of CT is 5.38 mm.

[0448] The ratio of the radius of curvature R2L2 of the image side of the second lens group G3 to the radius of curvature R3L1 of the object side of the third lens group G4, i.e., R2L2 / R3L1, is 0.73.

[0449] The ratio of the sum of the length L2 of the second lens group G3 along the optical axis and the length L3 of the third lens group G4 along the optical axis to the interval CT1W of the second lens group G3 and the third lens group G4 along the optical axis at the short focal end, i.e., (L2+L3) / CT1W, is 1.42.

[0450] The ratio of the focal length of the moving lens group G2, |f4|, to the focal length of the second lens, i.e., |f4| / EFLT, is 0.39.

[0451] The ratio of the focal length |f3| of the third lens group G4 to the focal length of the second lens, i.e., |f3| / EFLW, is 0.26.

[0452] Please refer to the following: Figures 18a to 18c , Figure 18a yes Figure 17 The axial chromatic aberration curve of the camera module 30 shown in some embodiments is located at the short focal length end. Figure 18b yes Figure 17 The image astigmatism curve of the camera module 30 shown in some embodiments is located at the short focal length end. Figure 18c yes Figure 17 The image shown is a distortion diagram of the camera module 30 at the short focal length in some embodiments.

[0453] The axial chromatic aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (the illustration includes 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm). Its physical meaning is the deviation of light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the normalized coordinate at the pupil. Figure 18a The values ​​shown are all relatively small, indicating that the on-axis aberrations (spherical aberration, chromatic aberration, etc.) of optical lens 1 are well corrected. The astigmatism field curve is used to illustrate the deviation of the convergence point (image height) of the fine beam from the ideal imaging plane in different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When a value in a certain field of view is too large, the image quality of that field of view is poor or high-level aberrations exist. Figure 18bThe field curvature in both directions shown is small, indicating that the system has good depth of focus. The distortion diagram is used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height in different fields of view. Figure 18c All values ​​shown are within 2.5%, ensuring that there is no obvious distortion in the image.

[0454] Please refer to the following: Figures 19a to 19c , Figure 19a yes Figure 17 The axial chromatic aberration curve of the camera module 30 at the telephoto end in some embodiments is shown below. Figure 19b yes Figure 17 The image astigmatism curve of the camera module 30 at the telephoto end in some embodiments is shown below. Figure 19c yes Figure 17 The image shown is a distortion diagram of the camera module 30 at the telephoto end in some embodiments.

[0455] The axial chromatic aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (the illustration includes 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm). Its physical meaning is the deviation of light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the normalized coordinate at the pupil. Figure 19a The values ​​shown are all relatively small, indicating that the on-axis aberrations (spherical aberration, chromatic aberration, etc.) of optical lens 1 are well corrected. The astigmatism field curve is used to illustrate the deviation of the convergence point (image height) of the fine beam from the ideal imaging plane in different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When a value in a certain field of view is too large, the image quality of that field of view is poor or high-level aberrations exist. Figure 19b The field curvature in both directions shown is small, indicating that the system has good depth of focus. The distortion diagram is used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height in different fields of view. Figure 19c All values ​​shown are within 0.5%, ensuring that there is no obvious distortion in the image.

[0456] The camera module 30 provided in this embodiment has an optical lens 1 with a zoom ratio of 1.655, an optical total length TTL of 28.1 mm, a value of f1w / f1t of 0.95, a value of (R1W1+R1T1) / (CT) of 5.75, and a value of CT of 7.37 mm. The optical lens 1 has a small optical total length TTL at a large zoom ratio and has good imaging quality.

[0457] Example 5

[0458] Please refer to Tables 5a, 5b, 5c, and 5d, among which Table 5a is... Figure 20The values ​​of the radius of curvature (R), thickness, effective focal length, refractive index (at a wavelength of 587.56 nm), and Abbe coefficient of each lens and reflector in another possible embodiment of the camera module 30 at the short focal length and long focal length ends are shown. The thickness includes the thickness of the structure itself and the spacing between the structures. Some parameters of the camera module 30 have different values ​​at the short focal length and long focal length ends; these values ​​are denoted by A to H, and the values ​​of A to H at the short focal length and long focal length ends are shown in Table 5b.

[0459] Tables 5c and 5d are... Figure 20 The camera module 30 shown in one possible embodiment displays the conic coefficient K and aspherical coefficient of each lens. Since the surface shape of the first lens L1 is variable, its conic coefficient K and aspherical coefficient values ​​are shown at the short focal length and long focal length ends, respectively. At the short focal length end, surface number 1 of the first lens L1 is represented by surface number 1a, and surface number 2 is represented by surface number 2a. At the long focal length end, surface number 1 of the first lens L1 is represented by surface number 1b, and surface number 2 is represented by surface number 2b.

[0460] Table 5a

[0461]

[0462] Table 5b

[0463] Short focal length telephoto end A 27.68 13.19 B -58.58 56.97 C 1.97 2.17 D 0.16 1.33 E 6.37 0.14 F 2.18 0.08 G 0.24 8.57 H 32.32 28.74

[0464] Table 5c

[0465] Face number Conic coefficient K A2 A4 A6 A8 A10 A12 A14 1a 1.71E+00 0.00E+00 5.35E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2a -1.79E+01 0.00E+00 1.23E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1b -2.17E+00 0.00E+00 1.12E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2b -5.20E+01 0.00E+00 -3.29E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 5 -3.14E-01 0.00E+00 -6.07E-04 -5.75E-04 1.76E-04 -3.72E-05 4.43E-06 -2.92E-07 6 5.57E+01 0.00E+00 3.08E-03 -7.21E-05 2.60E-05 -2.56E-05 5.03E-06 -4.41E-07 7 -3.86E+01 0.00E+00 -3.03E-03 1.53E-03 -4.29E-04 6.60E-05 -5.95E-06 3.23E-07 8 -1.87E+01 0.00E+00 -3.33E-05 -1.54E-04 9.07E-06 5.33E-06 -1.52E-06 1.85E-07 9 -6.79E+01 0.00E+00 -5.02E-03 1.14E-03 -1.35E-04 5.86E-06 2.05E-07 -1.63E-08 10 4.32E-03 0.00E+00 -1.38E-02 2.69E-03 -5.20E-04 6.81E-05 -5.90E-06 3.19E-07 11 -1.19E-01 0.00E+00 -8.48E-05 2.02E-05 -5.66E-06 5.79E-07 -2.15E-08 -5.91E-10 12 4.95E+01 0.00E+00 1.46E-04 -4.68E-04 1.11E-04 -1.22E-05 7.66E-07 -2.79E-08 13 -2.50E-01 0.00E+00 1.51E-03 -1.25E-03 2.72E-04 -3.11E-05 2.07E-06 -8.06E-08 14 3.66E-02 0.00E+00 7.56E-04 -8.66E-04 1.36E-04 -5.49E-06 -7.41E-07 1.05E-07 15 -7.09E-02 0.00E+00 -1.57E-03 1.47E-04 -9.06E-05 2.32E-05 -2.91E-06 2.05E-07 16 -9.80E+01 0.00E+00 -1.02E-03 3.66E-04 -9.65E-05 1.22E-05 -8.87E-07 3.72E-08 17 -1.11E+01 0.00E+00 -1.92E-03 5.85E-04 -1.49E-04 1.91E-05 -1.61E-06 8.69E-08 18 2.11E-01 0.00E+00 -8.04E-04 3.34E-04 -7.38E-05 8.55E-06 -6.70E-07 3.57E-08 19 1.16E-01 0.00E+00 1.93E-02 -2.86E-03 4.91E-04 -7.20E-05 8.11E-06 -6.54E-07 20 3.00E-01 0.00E+00 1.82E-02 -2.56E-03 3.89E-04 -4.71E-05 3.97E-06 -1.99E-07 21 -3.66E+00 0.00E+00 6.05E-03 -3.13E-03 7.25E-04 -1.20E-04 1.35E-05 -9.70E-07 22 2.07E+00 0.00E+00 8.43E-03 -4.33E-03 1.22E-03 -2.37E-04 3.17E-05 -2.95E-06 23 9.80E+01 0.00E+00 -9.07E-03 -3.49E-04 4.60E-04 -1.23E-04 1.98E-05 -2.17E-06 24 -3.71E+01 0.00E+00 -5.09E-03 3.87E-04 -2.11E-05 -6.79E-07 2.07E-07 -1.54E-08

[0466] Table 5d

[0467]

[0468]

[0469] The aspherical surfaces in optical lens 1 in Tables 5a, 5b, 5c, and 5d can be defined using, but are not limited to, the following aspherical curve equations:

[0470]

[0471] 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 Tables 5b and 5c. The first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, tenth lens L10, and eleventh lens L11 are all aspherical lenses.

[0472] Please refer to Table 5e, which is... Figure 20 The basic parameters of the camera module 30 shown in one possible embodiment are as follows: 1MH is the half-image height, EFLT is the focal length of the optical lens 1 at the telephoto end, EFLW is the focal length of the optical lens 1 at the short focal length end, FNOT is the aperture value of the optical lens 1 at the telephoto end, FNOW is the aperture value of the optical lens 1 at the short focal length end, and HFOV is... T HFOV is the half field of view of optical lens 1 at the telephoto end. W F1w is the half field of view of optical lens 1 at the short focal length end, TTL is the total optical length of optical lens 1, TTH is the total optical height of optical lens 1, f1w is the focal length of the first lens group G1 at the short focal length end, f1t is the focal length of the first lens group G1 at the long focal length end, f2 is the focal length of the second lens group G3, f3 is the focal length of the third lens group G4, and f4 is the focal length of the moving lens group G2. The values ​​of f1w, f1t, f2, f3, f4, FNOT, and FNOW are all valid values.

[0473] Table 5e

[0474]

[0475]

[0476] Please see Figure 20 , Figure 20 yes Figure 4 The diagram shows the structure of the camera module 30 in some other specific embodiments.

[0477] In this embodiment, the optical lens 1 includes a first lens group G1, a first transition element 4, a second lens group G3, a third lens group G4, and a movable lens group G2.

[0478] The first lens group G1, the first transition element 4, the second lens group G3, the third lens group G4, and the movable lens group G2 can be arranged sequentially from the object side to the image side. The second lens group G3, the third lens group G4, and the movable lens group G2 can be arranged along the optical axis of the second lens group G3, that is, the optical axes of the second lens group G3, the third lens group G4, and the movable lens group G2 can coincide; the optical axis of the first lens group G1 can be perpendicular to the optical axis of the second lens group G3.

[0479] The optical power of the first lens group G1 can be positive. The first lens group G1 may include a single-plane variable lens, namely the first lens L1.

[0480] The optical power of the second lens group G3 can be negative. The second lens group G3 may include three lenses: a second lens L2, a third lens L3, and a fourth lens L4. The second lens L2, the third lens L3, and the fourth lens L4 are arranged along the direction from the object side to the image side, and they can be relatively fixed. During zooming, the position of the second lens group G3 within the optical lens 1 can be fixed.

[0481] The optical power of the third lens group G4 can be positive. The third lens group G4 may include four lenses: a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. These lenses are arranged along the direction from the object side to the image side, and can be relatively fixed. The third lens group G4 is movable along the optical axis.

[0482] The optical power of the movable lens group G2 can be negative. The movable lens group G2 consists of three lenses: the ninth lens L9, the tenth lens L10, and the eleventh lens L11. These three lenses are arranged along the direction from the object side to the image side and can be relatively fixed. The movable lens group G2 can move along the optical axis.

[0483] The first deflection element 4 can be a prism. For example, the first deflection element 4 can include an incident light surface 41, a reflecting surface 42, and an exiting light surface 43. The incident light surface 41 can be perpendicular to the optical axis of the first lens group G1 and face the first lens group G1. The exiting light surface 43 can be perpendicular to the second lens group G3 and face the second lens group G3. The reflecting surface 42 receives the light beam from the incident light surface 41 and reflects it out through the exiting light surface 43, thereby changing the propagation direction of the light beam from the optical axis of the first lens group G1 to the optical axis of the second lens group G3. At this time, the optical axis of the first lens group G1 is the first direction, and the optical axis of the second lens group G3 is the second direction.

[0484] For example, the optical lens 1 may further include a second reversing element 5. The second reversing element 5 is located on the image side of the movable lens group G2. The second reversing element 5 may have an incident light surface 51, a reflecting surface 52, and an emitting light surface 53. The incident light surface 51 of the second reversing element 5 may be disposed facing the movable lens group G2. The emitting light surface 53 of the second reversing element 5 may be located on the same side of the optical axis of the movable lens group G2 as the first lens group G1. It is understood that in the camera module 30, the filter 3 and the photosensitive element 2 may face the emitting light surface 53 of the second reversing element 5 and be disposed parallel to the emitting light surface 53.

[0485] In this embodiment, during the process of changing the optical lens 1 from the short focal length end to the long focal length end, the surface shape of the first lens L1 changes, and the first lens L1 changes from the first focal length to the second focal length; the moving lens group G2 moves toward the third lens group G4, and the third lens group G4 moves toward the second lens group G3, that is, both the third lens group G4 and the moving lens group G2 move along the optical axis toward the object side; the optical lens 1 changes from the first lens focal length to the second lens focal length.

[0486] In this embodiment, by changing the surface shape of the variable-face lens, the curvature of the first lens group G1 is altered. Combined with the movement of the movable lens group G2, this changes the focal length of the optical lens 1, achieving lossless zoom. When the optical lens 1 captures external objects through its short focal length end, it has a shorter focal length and a wider field of view, facilitating the capture of close-up, wide-ranging objects with a prominent foreground. When the optical lens 1 captures external objects through its long focal length end, it has a longer focal length and a smaller field of view, facilitating the capture of details of distant objects and hard-to-reach subjects. The optical lens 1 has different focal lengths, enabling it to shoot at different focal lengths in different shooting scenarios, achieving optical zoom at different focal lengths—that is, lossless optical zoom. This results in higher quality images, better scene adaptability of the optical lens 1, and a significantly improved user shooting experience. Furthermore, it eliminates the need for multiple camera modules 30 in the electronic device to achieve different focal lengths, thus reducing the size of the camera module 30.

[0487] The first lens group G1 has a variable-format lens, allowing its focal length to be variable. The change in the focal length of the first lens group G1 has a significant impact on the focal length of the optical lens 1; that is, even a small change in the focal length of the first lens group G1 has a large effect on the focal length of the optical lens 1, thus facilitating a wide zoom range for the optical lens 1. Furthermore, the variable focal length capability of the first lens group G1, combined with the cooperation of the third lens group G4 and the movable lens group G2, enables the optical lens 1 to continuously and losslessly zoom between the first and second lens focal lengths, giving it strong zoom capabilities and high image quality at different focal lengths. By incorporating the first deflection element 4, the propagation direction of the light beam is altered, which helps reduce the size in the second direction, thereby reducing the length of the optical lens 1 and facilitating its miniaturization design.

[0488] By coordinating the optical power and focal length of the first lens group G1, the first transition element 4, the second lens group G3, the third lens group G4, and the moving lens group G2, the optical lens 1 has a strong zoom capability to perform a wide range of optical zoom; it also gives the optical lens 1 good image quality; and it gives the optical lens 1 a small length and volume.

[0489] Among them, the ratio of the field of view (FOVW) at the short focal length end of optical lens 1 to the field of view (FOVT) at the long focal length end, i.e., the value of FOVW / FOVT, is 2.08.

[0490] The zoom ratio EFLT / EFLW is 2.1.

[0491] The ratio of the first focal length f1w to the second focal length f1t of the first lens group G1, i.e., f1w / f1t, is 1.12. That is, the focal length of the first lens group G1 decreases as it changes from the short focal length end to the long focal length end.

[0492] The ratio of the total optical length TTL to the sum of the focal lengths of the first lens EFLW and the second lens EFLT, i.e., TTL / (EFLT+EFLW), is 0.66.

[0493] The ratio of the second lens focal length EFLT to the half-image height IMH, i.e., EFLT / IMH, is 2.94.

[0494] Referring to Table 5b, during the transition of optical lens 1 from the short focal length end to the long focal length end, the radius of curvature (A) of the object side surface of the first lens L1 decreases from 27.68 mm to 13.19 mm. The radius of curvature (B) of the image side surface of the first lens L1 changes from -58.58 mm to 56.97 mm, with the reciprocal of the value increasing.

[0495] The ratio of the sum of the radius of curvature R1W1 of the object side of the first lens L1 at the short focal length end and the radius of curvature R1T1 at the long focal length end to the distance CT that the moving lens group G2 moves from the short focal length end to the long focal length end, i.e., (R1W1+R1T1) / (CT), is 4.91. The value of CT is 8.33 mm.

[0496] The ratio of the radius of curvature R2L2 of the image side of the second lens group G3 to the radius of curvature R3L1 of the object side of the third lens group G4, i.e., R2L2 / R3L1, is 0.56.

[0497] The ratio of the sum of the length L2 of the second lens group G3 along the optical axis and the length L3 of the third lens group G4 along the optical axis to the distance CT1W between the second lens group G3 and the third lens group G4 at the short focal end along the optical axis, i.e., (L2+L3) / CT1W, is 1.28.

[0498] The ratio of the focal length of the moving lens group G2, |f4|, to the focal length of the second lens, i.e., |f4| / EFLT, is 0.31.

[0499] The ratio of the focal length |f3| of the third lens group G4 to the focal length of the second lens, i.e., |f3| / EFLW, is 0.20.

[0500] Please refer to the following: Figures 21a to 21c , Figure 21a yes Figure 20 The axial chromatic aberration curve of the camera module 30 shown in some embodiments is located at the short focal length end. Figure 21b yes Figure 20 The image astigmatism curve of the camera module 30 shown in some embodiments is located at the short focal length end. Figure 21c yes Figure 20 The image shown is a distortion diagram of the camera module 30 at the short focal length in some embodiments.

[0501] The axial chromatic aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (the illustration includes 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm). Its physical meaning is the deviation of light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the normalized coordinate at the pupil. Figure 21a The values ​​shown are all relatively small, indicating that the on-axis aberrations (spherical aberration, chromatic aberration, etc.) of optical lens 1 are well corrected. The astigmatism field curve is used to illustrate the deviation of the convergence point (image height) of the fine beam from the ideal imaging plane in different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When a value in a certain field of view is too large, the image quality of that field of view is poor or high-level aberrations exist. Figure 21b The field curvature in both directions shown is small, indicating that the system has good depth of focus. The distortion diagram is used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height in different fields of view. Figure 21c All values ​​shown are within 2.5%, ensuring that there is no obvious distortion in the image.

[0502] Please refer to the following: Figures 22a to 22c , Figure 22a yes Figure 20 The axial chromatic aberration curve of the camera module 30 at the telephoto end in some embodiments is shown below. Figure 22b yes Figure 20 The image astigmatism curve of the camera module 30 at the telephoto end in some embodiments is shown below. Figure 22c yes Figure 20 The image shown is a distortion diagram of the camera module 30 at the telephoto end in some embodiments.

[0503] The axial chromatic aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (the illustration includes 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm). Its physical meaning is the deviation of light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the normalized coordinate at the pupil. Figure 22a The values ​​shown are all relatively small, indicating that the on-axis aberrations (spherical aberration, chromatic aberration, etc.) of optical lens 1 are well corrected. The astigmatism field curve is used to illustrate the deviation of the convergence point (image height) of the fine beam from the ideal imaging plane in different fields of view. X represents the sagittal beam, and Y represents the meridional beam. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the image height. When a value in a certain field of view is too large, the image quality of that field of view is poor or high-level aberrations exist. Figure 22b The field curvature in both directions shown is small, indicating that the system has good depth of focus. The distortion diagram is used to characterize the relative deviation between the beam convergence point (actual image height) and the ideal image height in different fields of view. Figure 22c All values ​​shown are within 0.5%, ensuring that there is no obvious distortion in the image.

[0504] The camera module 30 provided in this embodiment has an optical lens 1 with a zoom ratio of 2.1, an optical total length TTL of 41 mm, an EFLT of 42 mm, a f1w / f1t value of 1.12, a (R1W1+R1T1) / (CT) value of 4.91, and a CT value of 8.33 mm. The optical lens 1 has a large zoom ratio and an optical total length TTL that is smaller than the focal length EFLT of the second lens. Furthermore, the optical lens 1 has good image quality.

[0505] 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.

[0506] 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.

[0507] 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 (1), characterized in that, The optical lens (1) includes a first lens group (G1), a first turning element (4), and a movable lens group (G2) arranged in sequence along the object side to the image side. The first turning element (4) is used to change the propagation direction of the optical axis from the optical axis direction of the first lens group (G1) to the optical axis direction of the movable lens group (G2), and the optical axis direction of the first lens group (G1) is different from the optical axis direction of the movable lens group (G2). The first lens group (G1) includes a lens with variable surface shape. During the zooming process of the optical lens (1), the lens with variable surface shape changes its surface shape to change the focal length of the first lens group (G1). The movable lens group (G2) can move along the optical axis. During the zooming process of the optical lens (1), the movable lens group (G2) moves along the optical axis direction of the movable lens group (G2).

2. The optical lens (1) according to claim 1, characterized in that, The optical lens (1) satisfies: FOVW / FOVT>1.1; or, FOVW / FOVT>1.5; Where, FOVW is the field angle of the optical lens (1) at the short focal end, and FOVT is the field angle of the optical lens (1) at the long focal end.

3. The optical lens (1) according to claim 1 or 2, characterized in that, The optical lens (1) satisfies: 0.8<f1w / f1t<1.6; or, 0.8<f1w / f1t<1; Or, 1<f1w / f1t<1.6; Where, f1w is the focal length of the first lens group (G1) at the short focal end, and f1t is the focal length of the first lens group (G1) at the long focal end.

4. The optical lens (1) according to any one of claims 1 to 3, characterized in that, The optical lens (1) satisfies: TTL / (EFLT+EFLW)<1; Where, TTL is the total optical length of the optical lens (1), EFLW is the focal length of the optical lens (1) at the short focal end, and EFLT is the focal length of the optical lens (1) at the long focal end.

5. The optical lens (1) according to claim 4, characterized in that, The optical lens (1) satisfies: EFLT / I MH>2; Where, I MH is the semi-image height of the optical lens (1).

6. The optical lens (1) according to any one of claims 1 to 5, characterized in that, The optical power of the first lens group (G1) is positive.

7. The optical lens (1) according to any one of claims 1 to 6, characterized in that, When the optical lens (1) changes from the short focal end to the long focal end, the curvature radius of the object side surface of the lens with variable surface shape of the first lens group (G1) becomes smaller, and / or, the reciprocal of the curvature radius of the image side surface of the lens with variable surface shape increases.

8. The optical lens (1) according to any one of claims 1 to 7, characterized in that, The optical lens (1) satisfies: 3.5<(R1W1+R1T1) / (CT)<7; Where, R1W1 is the curvature radius of the object side surface of the lens with variable surface shape of the first lens group (G1) at the short focal end, R1T1 is the curvature radius of the object side surface of the lens with variable surface shape of the first lens group (G1) at the long focal end, and CT is the moving distance of the movable lens group (G2) when changing from the short focal end to the long focal end.

9. The optical lens (1) according to any one of claims 1 to 8, characterized in that, The optical lens (1) further includes a second lens group (G3) and a third lens group (G4). The second lens group (G3), the third lens group (G4), and the movable lens group (G2) are arranged in sequence along the object side to the image side. When the optical lens (1) changes from the short focal end to the long focal end, the movable lens group (G2) moves along the optical axis towards the object side.

10. The optical lens (1) according to claim 8 or 9, characterized in that, The optical lens (1) satisfies: 0.5 <R2L2 / R3L1<1.2; Wherein, R2L2 is the radius of curvature of the image side of the second lens group (G3), and R3L1 is the radius of curvature of the object side of the third lens group (G4).

11. The optical lens (1) according to any one of claims 8 to 10, characterized in that, The optical lens (1) satisfies: 1.2 < (L2 + L3) / CT1W < 2.4; Wherein, L2 is the length of the second lens group (G3) along the optical axis, L3 is the length of the third lens group (G4) along the optical axis, and CT1W is the interval between the second lens group (G3) and the third lens group (G4) along the optical axis at the short focal length end.

12. The optical lens (1) according to any one of claims 8 to 11, characterized in that, The optical lens (1) satisfies: 0.2 < |f4| / EFLT < 0.4; Where f4 is the focal length of the moving lens group (G2) and EFLT is the focal length of the second lens.

13. The optical lens (1) according to claim 12, characterized in that, The optical lens (1) satisfies: 0.2 < |f3| / EFLT < 0.3; Where f3 is the focal length of the third lens group (G4) and EFLT is the focal length of the second lens.

14. The optical lens (1) according to any one of claims 8 to 13, characterized in that, The second lens group (G3) is a fixed lens group, and the third lens group (G4) can move along the optical axis. When the optical lens (1) changes from the short focal length end to the long focal length end, the third lens group (G4) and the movable lens group (G2) can move along the optical axis. Alternatively, the second lens group (G3) and the third lens group (G4) can move along the optical axis. When the optical lens (1) changes from the short focal length end to the long focal length end, the second lens group (G3), the third lens group (G4) and the movable lens group (G2) can move along the optical axis.

15. The optical lens (1) according to any one of claims 8 to 14, characterized in that, The optical power of the movable lens group (G2) is negative.

16. The optical lens (1) according to claim 1, characterized in that, The optical lens (1) further includes a second deflection element (5), which is located on the image side of the movable lens group (G2). The second deflection element (5) is used to change the light beam from a second direction to a third direction, and the second direction and the third direction have an angle.

17. The optical lens (1) according to claim 16, characterized in that, The third direction is parallel to the optical axis of the first lens group (G1), and the second turning element (5) has a light-emitting surface (53), which is perpendicular to the third direction. The light-emitting surface (53) and the first lens group (G1) are located on the same side of the optical axis of the moving lens group (G2).

18. The optical lens (1) according to any one of claims 1 to 17, characterized in that, The optical lens (1) is configured such that, during the focusing process of the optical lens (1), the movable lens group (G2) moves along the optical axis.

19. A camera module (30), characterized in that, It includes a photosensitive element and an optical lens (1) as claimed in any one of claims 1 to 18, wherein the photosensitive element (2) is located on the image side of the optical lens (1).

20. The camera module (30) according to claim 19, characterized in that, The photosensitive element (2) is configured such that during the image stabilization process of the camera module (30), the photosensitive element (2) moves along a direction perpendicular to the optical axis of the photosensitive element (2).

21. An electronic device (100), characterized in that, Includes an image processor (60) and a camera module (30) as described in claim 19 or 20, wherein the image processor (60) is communicatively connected to the camera module (30), and the image processor (60) is used to acquire image data from the camera module (30) and process the image data.

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