Optical lens, camera module and electronic device

Abstract

An optical lens (1), a camera module (30) and an electronic device (100). The optical lens (1) comprises a first lens group (G1), a first deflection element (4) and a moving lens group (G2) which are sequentially arranged in the direction from an object side to an image side, wherein the first deflection element (4) is configured to change the beam propagation direction from a direction along the optical axis of the first lens group (G1) to a direction along the optical axis of the moving lens group (G2); the first lens group (G1) comprises a lens with a variable surface form, and the first lens group (G1) can change the focal length during the zooming process of the optical lens (1); and the moving lens group (G2) can move along the optical axis, and the moving lens group (G2) moves along the direction of the optical axis thereof during the zooming process of the optical lens (1). With the variable focal length capability of the first lens group (G1) and the cooperation with the moving lens group (G2), it is convenient to achieve continuous lossless zoom of the optical lens (1) between a telephoto end and a wide-angle end, such that the optical lens (1) has high imaging quality at different focal lengths. Arranging the first deflection element (4) so as to change the beam propagation direction is conducive to the miniaturization design of the optical lens (1).

Description

Optical lens, camera module and electronic device

[0001] The present application claims priority to the Chinese patent application No. 202411346602.2, filed on September 25, 2024, entitled “Optical lens, camera module and electronic device”, the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of optical lens, in particular to an optical lens, a camera module and an electronic device. BACKGROUND

[0003] Zooming is a very important part of user photography experience. With the increasing popularity of long-focus photography on smartphones, consumers have increasingly high requirements for zooming.

[0004] Current technical solutions exist to achieve zooming effect by adding one or more fixed-focus optical lenses. There also exist solutions to achieve continuous change of focal length by moving one or more groups of lens. However, these solutions will occupy a large internal space of the device, which is not conducive to the slim design of electronic devices such as mobile phones with small size, and will also greatly increase the implementation cost. SUMMARY

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

[0006] In a first aspect, the embodiments of the present application provide an optical lens, comprising a first lens group, a first turning element and a moving lens group arranged in sequence along the direction from the object side to the image side, the first turning element being configured 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 moving lens group, the optical axis of the first lens group being different from the optical axis direction of the moving lens group; the first lens group comprises a face-type variable lens, and the face-type variable lens changes the focal length of the first lens group by changing the face type during zooming; the moving lens group is capable of moving along the optical axis, and the moving lens group moves along the optical axis of the moving lens group during zooming.

[0007] The first lens group can include at least one face-type variable lens.

[0008] The first turning element is configured to change the propagation direction of the light beam. For example, the first turning element can be a prism, a mirror, etc.

[0009] The moving lens group can refer to a lens group whose position in the optical lens can be changed along the optical axis to perform zooming or focusing. It can be understood that the position of the moving lens group can be moved to a set position and kept relatively fixed. The moving lens group can be driven by a driving mechanism such as a voice coil motor, so as to realize movement.

[0010] The face-type variable lens can refer to changing the focal length by changing the surface shape, thereby changing the curvature. For example, the face-type variable lens can change the focal length by changing the shape of the object side surface and / or the image side surface. After the focal length of the face-type variable lens is changed, the focal length of the first lens group is correspondingly changed.

[0011] The short focal end can be a wide-angle mode of the optical lens, and the long focal end can be a long-focus mode of the optical lens. Alternatively, the short focal end and the long focal end are both long-focus modes of the optical lens, and the long focal end is a long-focus mode with a longer focal length.

[0012] In this embodiment, by changing the face type of the face-type variable lens, thereby changing the curvature of the first lens group, and cooperating with the movement of the moving lens group, the focal length of the optical lens is changed, and lossless zooming is realized. When the optical lens captures external scenes through the short focal end, it has a shorter focal length and a larger field of view angle, which is convenient for capturing scenes at a closer distance and a wider range, and the foreground is more prominent. When the optical lens captures external scenes through the long focal end, it has a longer focal length and a smaller field of view angle, which is convenient for capturing details of distant scenes and objects that are not easy to approach. The optical lens has different focal lengths, which can enable the optical lens to use different focal lengths for shooting in different shooting scenes, realize optical zooming of different focal lengths, that is, realize lossless optical zooming, which is conducive to obtaining higher quality images, better scene adaptability of the optical lens, and greatly improved shooting experience of the user; and multiple camera modules do not need to be arranged in the electronic device to realize shooting of different focal lengths, thereby reducing the size of the camera module 30.

[0013] The first lens group has a face-type variable lens, so that the focal length of the first lens group is variable. The change of the focal length of the first lens group has a greater impact on the focal length of the optical lens, that is, a smaller change of the focal length of the first lens group has a greater impact on the focal length of the optical lens, so that the optical lens is easy to have a larger zooming range. Moreover, through the variable focal length of the first lens group and the cooperation of the moving lens group, the optical lens can be continuously and losslessly zoomed between the first lens focal length and the second lens focal length, so that the optical lens has a strong zooming capability and has a high imaging quality at different focal lengths. By arranging the first folding element, the propagation direction of the light beam is changed, which is conducive to reducing the size in the second direction, and further conducive to reducing the length of the optical lens, and conducive to the miniaturization design of the optical lens.

[0014] In some embodiments, the optical lens satisfies: FOVW / FOVT>1.1; wherein FOVW is the field of view angle of the optical lens at the short-focus end, and FOVT is the field of view angle of the optical lens at the long-focus end.

[0015] At this time, the field of view angle of the optical lens at the short-focus end is larger, and the optical lens is convenient for shooting closer distance scenes; the field of view angle of the optical lens at the long-focus end is smaller, and the optical lens is convenient for shooting farther distance scenes; thereby the adaptability of the optical lens is stronger, and the imaging quality is higher.

[0016] Alternatively, FOVW / FOVT>1.5.

[0017] At this time, the field of view angle FOVW of the optical lens at the short-focus end and the field of view angle FOVT of the optical lens at the long-focus end have a larger difference, the range of the field of view angle of the optical lens is larger, and the adaptability of the optical lens is stronger.

[0018] In some embodiments, the optical lens satisfies: 0.8

[0019] By reasonably setting the ratio of the first focal length f1w of the first lens group at the short-focus end and the second focal length f1t of the first lens group at the long-focus end, the optical lens has a larger zooming capability under a small size, and the image quality of the optical lens at different focal lengths is balanced.

[0020] Alternatively, 0.8

[0021] At this time, when the optical lens changes from the short-focus end to the long-focus 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 towards 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, the moving distance of the moving lens group is shorter, the setting of the driving component is facilitated, and the aberration is balanced.

[0022] Alternatively, 1

[0023] At this time, by reasonably setting the ratio of the first focal length f1w and the second focal length f1t, the optical lens is easy to be compatible with longer focal length and shorter focal length under smaller total optical length, or the optical lens is easy to have smaller total optical length under a certain zoom ratio, that is, the total optical length and the zoom ratio of the optical lens are balanced, the optical lens is easy to have smaller total optical length and larger zoom ratio, and the structure design of the optical lens is easier to realize.

[0024] In some embodiments, the optical lens satisfies: TTL / (EFLT+EFLW)<1; where TTL is the total track length of the optical lens, EFLW is the focal length of the short-focus end of the optical lens, and EFLT is the focal length of the long-focus end of the optical lens.

[0025] For example, TTL / (EFLT+EFLW)<0.7.

[0026] In this embodiment, by reasonably setting the ratio of the total track length TTL and the sum of the first lens focal length EFLW and the second lens focal length EFLT, the optical lens has a smaller total track length, or the optical lens has a larger second lens focal length EFLT.

[0027] In some embodiments, the optical lens satisfies: EFLT / IMH>2; where IMH is the half image height of the optical lens.

[0028] In this embodiment, by reasonably setting the ratio of the second lens focal length EFLT and the half image height IMH, the optical lens has a larger second lens focal length.

[0029] In some embodiments, the first lens group has positive refractive power.

[0030] In this embodiment, the first lens group can converge light beams, and reduce the lens aperture of the moving lens group, thereby reducing the size of the optical lens.

[0031] In some embodiments, when the optical lens changes from the short-focus end to the long-focus end, the radius of curvature of the object side of the face-variable lens decreases, and / or the reciprocal of the radius of curvature of the image side of the face-variable lens increases.

[0032] For example, when the radius of curvature of the object side of the face-variable lens decreases, the focal length of the face-variable lens decreases.

[0033] For example, when the reciprocal of the radius of curvature of the image side of the face-variable lens increases, the focal length of the face-variable lens increases.

[0034] For example, the face type of the object side and the face type of the image side of the face-variable lens can also be changed synchronously to change the focal length of the face-variable lens. At this time, the focal length of the face-variable lens can increase or decrease, which can be set according to the requirement of the focal length of the face-variable lens. Synchronously changing the face type of the object side and the face type of the image side of the face-variable lens can change the focal length of the face-variable lens, and also facilitates the cooperation of the object side and the image side, thereby balancing the aberration.

[0035] In some embodiments, the optical lens satisfies: 3.5 < (R1W1+R1T1) / (CT) < 7; wherein R1W1 is a radius of curvature of an object side surface of the face type variable lens of the first lens group at the short focal length end, R1T1 is a radius of curvature of the object side surface of the face type variable lens of the first lens group at the long focal length end, and CT is a distance that the moving lens group moves from the short focal length end to the long focal length end.

[0036] When the values of R1W1 and R1T1 are large, the optical power of the face type variable lens at the short focal length end and the long focal length end is small, which makes the first focal length of the first lens group at the short focal length end more easily match the first lens focal length of the optical lens, and further makes the first lens focal length more easily match the total track length. At this time, the optical lens is more easily provided with a smaller first lens focal length, which is beneficial to the design of a larger zoom ratio of the optical lens, and also makes the optical lens have a better wide-angle shooting effect. If the value of CT is small, the moving distance of the moving lens group is small, which is beneficial to the design of a smaller space reserved for the movement of the moving lens group, and further beneficial to the design of a smaller total track length TTL of the optical lens.

[0037] In the 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, and further the optical lens has a larger zoom ratio, a smaller total track length, and is also easy to design other parameters of the optical lens.

[0038] In some embodiments, the optical lens further comprises 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, and the moving lens group moves along the optical axis to the object side when the optical lens changes from the short focal length end to the long focal length end.

[0039] The second lens group can include at least one lens.

[0040] The third lens group can include at least one lens.

[0041] In the embodiment, the optical lens is switched between the short focal length end and the long focal length end, and the moving lens group moves to complete the zoom of the optical lens. Since the moving lens group is close to the image plane, the compensation ability of the moving lens group is strong, and thus moving the moving lens group is beneficial to the zoom of the optical lens and the compensation of aberration.

[0042] In some embodiments, the optical lens satisfies: 0.5 < R2L2 / R3L1 < 1.2; wherein R2L2 is a radius of curvature of an image side surface of the second lens group, and R3L1 is a radius of curvature of an object side surface of the third lens group.

[0043] The image-side surface of the second lens group and the object-side surface of the third lens group are two adjacent surfaces, and the light beam is emitted from the image-side surface of the second lens group and then enters the third lens group through the object-side surface of the third lens group.

[0044] In the embodiment, the radii of curvature of the image-side surface of the second lens group and the object-side surface of the third lens group are reasonably set, so that the light beam propagates more smoothly in the second lens group and the third lens group, which is beneficial to reduce aberration and improve the image quality of the optical lens.

[0045] In some embodiments, the optical lens satisfies: 1.2 < (L2+L3) / CT1W < 2.4; wherein 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 lens group and the third lens group along the optical axis at the short-focus end.

[0046] In the embodiment, the thickness of the second lens group, the thickness of the third lens group, and the interval between the second lens group and the third lens group are reasonably configured, so that the light beam passes through the second lens group and the third lens group more smoothly, which is beneficial to improve the optical quality and the imaging effect.

[0047] In some embodiments, the optical lens satisfies: 0.2 < |f4| / EFLT < 0.4; wherein f4 is the focal length of the moving lens group, and EFLT is the second lens focal length.

[0048] In the embodiment, the focal length of the moving lens group is reasonably set, which is beneficial to simplify the setting of the focal length of the second lens group and the focal length of the third lens group, so as to be easily adapted to the first lens group, thereby simplifying the design and improving the zooming capability of the optical lens.

[0049] In some embodiments, the optical lens satisfies: 0.2 < |f3| / EFLT < 0.3; wherein f3 is the focal length of the third lens group, and EFLT is the second lens focal length.

[0050] In the embodiment, the focal length of the third lens group is reasonably set, which is beneficial to make the third lens group easily adapted to the first lens group, thereby improving the zooming capability of the optical lens.

[0051] In some embodiments, the second lens group is a fixed lens group, and the third lens group can move along the optical axis; when the optical lens changes from the short-focus end to the long-focus end, the third lens group and the moving lens group can move along the optical axis.

[0052] Alternatively, the second lens group and the third lens group can move along the optical axis respectively; when the optical lens changes from the short-focus end to the long-focus end, the second lens group, the third lens group, and the moving lens group can move along the optical axis.

[0053] In the embodiment, when the optical lens is zooming, the second lens group is fixed, and the third lens group and the moving lens group can move along the optical axis; the zooming is realized by moving the third lens group and the moving lens group, the adjustment ability of the moving lens group is stronger, which is beneficial to improve the zooming ability and balance the aberration ability, and the image quality is better.

[0054] 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 moving lens group can move along the optical axis. Compared with moving the third lens group and the moving lens group, moving the three lens groups means that the lens groups behind the first turning element can move, and the lens groups behind the first turning element have stronger adjustment ability and stronger aberration balancing ability, which is beneficial to make the zooming ability of the optical lens stronger and the image quality better.

[0055] In some embodiments, the optical power of the moving lens group is negative.

[0056] The total optical power of the lens groups before 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.

[0057] 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.

[0058] In the embodiment, by reasonably setting the optical power of the moving lens group, the optical power of the optical lens can be reasonably divided, the zooming ability of the optical lens can be ensured to be strong, the total optical length of the optical lens can be small, the aberration of the optical lens can be well balanced, and the image quality of the optical lens can be better.

[0059] In some embodiments, the optical lens further comprises a second turning element, the second turning element is located on the image side of the moving lens group, and the second turning element is used to change the light beam from the second direction to the third direction, the second direction and the third direction have an included angle.

[0060] For example, the third direction can be parallel to the first direction. Alternatively, the third direction can also have an included angle with the first direction.

[0061] In the embodiment, by setting the second turning element, the optical path can be folded to reduce the total optical length TTL of the optical lens, so as to facilitate the miniaturization of the optical lens; and the second turning element can also facilitate the setting of the position of the imaging surface, so as to facilitate the position setting of the photosensitive element in the camera module, and also facilitate the setting of a larger photosensitive element, so as to make the imaging quality higher.

[0062] In some embodiments, the third direction is parallel to the direction of the optical axis of the first lens group, the second turning element has an out-coupling surface, the out-coupling surface is perpendicular to the third direction, and the out-coupling surface is located on the same side of the optical axis of the first lens group as the moving lens group.

[0063] In the embodiment, the light rays are emitted by the out-coupling surface of the second turning element along the third direction, and because the out-coupling surface is located on the same side of the optical axis of the first lens group as the moving lens group, the imaging surface is also located on the same side of the optical axis of the first lens group as the third lens group; the height space occupied by the first lens group in the direction of the optical axis is reused, so that no additional space needs to be reserved for the imaging surface and the photosensitive element, which is conducive to the position setting of the photosensitive element, and thus is conducive to reducing the height of the optical lens in the third direction and facilitating miniaturization design.

[0064] In some embodiments, the optical lens is configured such that, during focusing of the optical lens, the moving lens group moves along the optical axis.

[0065] In the embodiment, the moving lens group can move during zooming and focusing, which can reduce the setting of components for driving the movement of each lens group and is conducive to simplifying the structure of the optical lens.

[0066] In the second aspect, the embodiments of the present application provide a camera module, which includes a photosensitive element and an optical lens provided by any one of the embodiments of the first aspect, and the photosensitive element is located on the image side of the optical lens.

[0067] In the embodiment, the optical lens has strong zooming capability, has high imaging quality at different focal lengths, and is easy to miniaturize, so that the camera module can have strong zooming capability and obtain high-quality images, is easy to miniaturize, and has a wide range of applications.

[0068] In some embodiments, the photosensitive element is configured such that, during anti-shake of the camera module, the photosensitive element moves along a direction perpendicular to the optical axis of the photosensitive element.

[0069] In the embodiment, anti-shake is achieved by moving the photosensitive element, which is conducive to setting the anti-shake driving components on the photosensitive element and is conducive to simplifying the structure of the optical lens and making the layout of the camera module more reasonable.

[0070] In the third aspect, the embodiments of the present application provide an electronic device, which includes an image processor and a camera module provided by the second aspect, the image processor is in communication connection with the camera module, and the image processor is configured to acquire image data from the camera module and process the image data.

[0071] In the embodiment, the electronic device has strong shooting capability and can have a thin size, and the user experience is good. BRIEF DESCRIPTION OF DRAWINGS

[0072] In order to illustrate the technical solutions in the embodiments of the present application or the background art, the accompanying drawings needed to be used in the embodiments of the present application or the background art will be described below.

[0073] In the drawings:

[0074] Fig. 1 is a structural schematic diagram of an electronic device in some embodiments according to the present application;

[0075] Fig. 2 is a partially exploded structural schematic diagram of the electronic device shown in Fig. 1;

[0076] Fig. 3 is a structural schematic diagram of a camera module shown in Fig. 2;

[0077] Fig. 4 is a structural schematic diagram of the camera module shown in Fig. 3 in some embodiments;

[0078] Fig. 5 is a structural schematic diagram of the camera module shown in Fig. 4 in some embodiments in different shooting modes;

[0079] Fig. 6 is a structural schematic diagram of the camera module shown in Fig. 4 in other embodiments;

[0080] Fig. 7 is a structural schematic diagram of the camera module shown in Fig. 4 in still other embodiments;

[0081] Fig. 8 is a structural schematic diagram of the camera module shown in Fig. 4 in some specific embodiments;

[0082] Fig. 9a is an axial chromatic aberration curve of the camera module shown in Fig. 8 in some embodiments at a short-focus end;

[0083] Fig. 9b is a field curvature curve of the camera module shown in Fig. 8 in some embodiments at the short-focus end;

[0084] Fig. 9c is a distortion diagram of the camera module shown in Fig. 8 in some embodiments at the short-focus end;

[0085] Fig. 10a is an axial chromatic aberration curve of the camera module shown in Fig. 8 in some embodiments at a long-focus end;

[0086] Fig. 10b is a field curvature curve of the camera module shown in Fig. 8 in some embodiments at the long-focus end;

[0087] Fig. 10c is a distortion diagram of the camera module shown in Fig. 8 in some embodiments at the long-focus end;

[0088] Fig. 11 is a structural schematic diagram of the camera module shown in Fig. 4 in other specific embodiments;

[0089] Fig. 12a is an axial chromatic aberration curve of the camera module shown in Fig. 11 in some embodiments at a short-focus end;

[0090] Figure 12b is a plot of lateral chromatic aberration for the camera module of Figure 11 in some embodiments at the short end;

[0091] Figure 12c is a plot of distortion for the camera module of Figure 11 in some embodiments at the short end;

[0092] Figure 13a is a plot of axial chromatic aberration for the camera module of Figure 11 in some embodiments at the long end;

[0093] Figure 13b is a plot of lateral chromatic aberration for the camera module of Figure 11 in some embodiments at the long end;

[0094] Figure 13c is a plot of distortion for the camera module of Figure 11 in some embodiments at the long end;

[0095] Figure 14 is a schematic diagram of the camera module of Figure 4 in yet other specific embodiments;

[0096] Figure 15a is a plot of axial chromatic aberration for the camera module of Figure 14 in some embodiments at the short end;

[0097] Figure 15b is a plot of lateral chromatic aberration for the camera module of Figure 14 in some embodiments at the short end;

[0098] Figure 15c is a plot of distortion for the camera module of Figure 14 in some embodiments at the short end;

[0099] Figure 16a is a plot of axial chromatic aberration for the camera module of Figure 14 in some embodiments at the long end;

[0100] Figure 16b is a plot of lateral chromatic aberration for the camera module of Figure 14 in some embodiments at the long end;

[0101] Figure 16c is a plot of distortion for the camera module of Figure 14 in some embodiments at the long end;

[0102] Figure 17 is a schematic diagram of the camera module of Figure 4 in still other specific embodiments;

[0103] Figure 18a is a plot of axial chromatic aberration for the camera module of Figure 17 in some embodiments at the short end;

[0104] Figure 18b is a plot of lateral chromatic aberration for the camera module of Figure 17 in some embodiments at the short end;

[0105] Figure 18c is a plot of distortion for the camera module of Figure 17 in some embodiments at the short end;

[0106] Figure 19a is a plot of axial chromatic aberration for the camera module of Figure 17 in some embodiments at the long end;

[0107] Figure 19b is a field curvature plot of the camera module shown in Figure 17 at the tele end in some embodiments;

[0108] Figure 19c is a distortion plot of the camera module shown in Figure 17 at the tele end in some embodiments;

[0109] Figure 20 is a structural schematic of the camera module shown in Figure 4 in further specific embodiments;

[0110] Figure 21a is an axial chromatic aberration plot of the camera module shown in Figure 20 at the wide end in some embodiments;

[0111] Figure 21b is a field curvature plot of the camera module shown in Figure 20 at the wide end in some embodiments;

[0112] Figure 21c is a distortion plot of the camera module shown in Figure 20 at the wide end in some embodiments;

[0113] Figure 22a is an axial chromatic aberration plot of the camera module shown in Figure 20 at the tele end in some embodiments;

[0114] Figure 22b is a field curvature plot of the camera module shown in Figure 20 at the tele end in some embodiments;

[0115] Figure 22c is a distortion plot of the camera module shown in Figure 20 at the tele end in some embodiments. DETAILED DESCRIPTION

[0116] For the convenience of understanding, the following first explains and describes the English abbreviations and related technical terms involved in the embodiments of the present application.

[0117] Focal power, equal to the difference between the convergence degree of the image side beam and the convergence degree of the object side beam, which represents the ability of the optical system to deflect light rays.

[0118] A lens or lens group with positive focal power, which has a positive focal length and has the effect of converging light rays.

[0119] A lens or lens group with negative focal power, which has a negative focal length and has the effect of diverging light rays.

[0120] Focal length, also called focal length, is a measure of the convergence or divergence of light in an optical system, which refers to the vertical distance from the optical center of the lens or lens group to the focal plane when the infinite scene through the lens or lens group forms a clear image. From a practical point of view, it can be understood as the distance from the lens center to the plane when the object is at infinity. For a fixed-focus lens, the position of the optical center is fixed; for a long-focus lens, the change of the optical center of the lens brings the change of the focal length of the lens.

[0121] Effective focal length (EFL), refers to the distance from the principal point to the point where the light converges, i.e. the focus.

[0122] Object side, with the lens as the boundary, the side where the object is located is the object side, and the surface of the lens close to the object side is called the object side.

[0123] Image side, with the lens as the boundary, the side where the image of the object is located is the image side, and the surface of the lens close to the image side is called the image side.

[0124] Aperture diaphragm, is a device used to control the amount of light that enters the lens into the body of the camera. It is usually in the lens.

[0125] F-number, also known as F-number, is a relative value (inverse of relative aperture) derived from the focal length of the lens / diameter of the entrance pupil of the lens. The smaller the F-number, the more light enters in the same unit of time. The smaller the F-number, the smaller the depth of field, and the background content of the photograph will be blurred, similar to the effect of a long-focus lens.

[0126] Total track length (TTL), refers to the total length from the surface closest to the object side of the lens to the imaging surface. TTL is the main factor in determining the height of the camera.

[0127] Imaging surface, located on the image side of all lenses in the long-focus lens, and the carrier surface on which the image is formed after the light passes through each lens in the long-focus lens.

[0128] Optical axis, is an axis that passes vertically through the center of the lens, also refers to the center line of the light beam (light column), or the symmetry axis of the optical system. The optical axis of the lens is the axis that passes through the center of each lens in the lens. When parallel light enters a convex lens, the ideal convex lens should converge all light rays to a point behind the lens, and this point where all light rays converge is called the focal point.

[0129] Focal point, the converging point of parallel light after refraction through a lens or lens group.

[0130] The image-side focal plane, also referred to as the back focal plane or second focal plane, is a plane passing through the image-side focal point (also referred to as the back focal point or second focal point) and perpendicular to the optical axis of the system.

[0131] The Abbe number (Abbe), also referred to as the dispersion coefficient, is the ratio of the difference in refractive index of an optical material at different wavelengths, and represents the degree of dispersion of the material.

[0132] The field of view (FOV) in an optical instrument is the angle formed by the two edges of the maximum range of the object image of the measured target that can pass through the lens of the optical instrument, with the lens as the vertex. The size of the field of view determines the field of view of the optical instrument. The larger the field of view, the larger the field of view, and the smaller the optical magnification.

[0133] Half image height (ImH): refers to the half image height of the image formed by the lens.

[0134] Maximum image circle diameter (MIC): the diameter of the largest diameter circle formed by the circular optical system. It depends on or determines the size of the sensor used.

[0135] Aberration: the near-axis region of an optical system has the properties of an ideal optical system. A point on the object emits near-axis light rays that intersect at a point (i.e. near-axis image point) on the image plane. However, the light rays passing through different apertures of the lens are difficult to perfectly intersect at a point, and there is a certain deviation from the position of the near-axis image point. These differences are collectively referred to as aberration.

[0136] Longitudinal spherical aberration, also known as longitudinal chromatic aberration or position chromatic aberration or axial aberration, is a bundle of parallel light rays that converge at different positions before and after passing through the lens. This aberration is called position chromatic aberration or axial aberration. This is because the lens forms images of different wavelengths at different positions, so that the image-side focal planes of different colors cannot coincide when the final image is formed, and the dispersion of the complex color light is formed.

[0137] Distortion, also known as distortion, is the degree of distortion of the image formed by the optical system relative to the object itself. Distortion is caused by the effect of the stop spherical aberration. The intersection height of the chief ray of different fields passing through the optical system and the Gaussian image plane is not equal to the ideal image height, and the difference between the two is the distortion. Therefore, distortion only changes the imaging position of the off-axis object point on the ideal plane, causing the shape of the image to be distorted, but does not affect the clarity of the image.

[0138] Astigmatism, the light beam emitted by an object point not on the optical axis of an optical system has an inclination angle with the optical axis. After refraction by a lens, the convergence points of the meridional pencil and the sagittal pencil are not on the same point. That is, the light beam cannot be focused on a point, the image is not clear, and therefore astigmatism is generated. Meridional pencil and sagittal pencil are the names of light beams in two perpendicular planes in a rotationally symmetric optical system.

[0139] Meridian plane, the plane formed by the principal ray (principal pencil) of an object point outside the optical axis and the optical axis is called the meridian plane.

[0140] Sagittal surface, the plane passing through the principal ray (principal pencil) of an object point outside the optical axis and perpendicular to the meridian plane is called the sagittal surface.

[0141] Curvature of field, the curvature of field is used to represent the difference in the position of the sharpest image point of the light rays in the non-central field of view after passing through the optical lens group and the position of the sharpest image point of the central field of view on the optical axis. When the lens has field curvature, the intersection of the entire light beam does not coincide with the ideal image point, although a clear image point can be obtained at each specific point, but the entire image plane is a curved surface.

[0142] Optical image stabilization (OIS), relying on the structure and movement of special lenses or light-sensitive elements to reduce the instability of the image caused by the operator's shaking during use to the greatest extent.

[0143] Auto focus (AF), is a method of using the principle of light reflection of an object, the reflected light is accepted by the sensor on the camera (module) and processed by the computer, and the electric focusing device is driven to focus.

[0144] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0145] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting" should be understood in a broad sense, for example, "connecting" can be detachable connection, or can be non-detachable connection; can be direct connection, or indirect connection through intermediate medium. "Multiple" means at least two.

[0146] The positional terms mentioned in the embodiments of the present application, such as "upper", "lower", "inner", "outer", "top", "bottom", "side" and the like, are only the directions of the drawings, therefore, the positional terms used are for better and clearer illustration and understanding of the embodiments of the present application, and are not indicative or suggestive of the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0147] In the embodiments of the present application, the relative positional relationship mentioned, such as parallel, vertical, aligned and the like, are all in view of the current process level, and are not absolute strict limits, and a small amount of deviation is allowed, and approximate parallel, approximate vertical, approximate aligned and the like are all possible. For example, A is parallel to B, which means that A and B are parallel or approximately parallel, and the included angle between A and B can be between 0 degrees and 10 degrees. For example, A is perpendicular to B, which means that A and B are perpendicular or approximately perpendicular, and the included angle between A and B can be between 80 degrees and 100 degrees.

[0148] In the embodiments of the present application, the terms "first", "second", "third", "fourth" are only for descriptive purposes, and cannot be understood as indicative or suggestive of relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth" can explicitly or implicitly include one or more of the features.

[0149] Please refer to FIG. 1 and FIG. 2, FIG. 1 is a structural schematic diagram of an electronic device 100 in some embodiments provided by the present application, and FIG. 2 is a partially exploded structural schematic diagram of the electronic device 100 shown in FIG. 1. In the present embodiment, the electronic device 100 is taken as a mobile phone for example for description. It can be understood that FIG. 1 and FIG. 2 only schematically show some components included in the electronic device 100, and the actual shape, actual size, actual position and actual structure of these components are not limited by FIG. 1 and FIG. 2, and the electronic device 100 can also include more or fewer components compared with FIG. 1 and FIG. 2.

[0150] In some embodiments, the electronic device 100 can include a screen 10, a housing 20, and a camera module 30. The screen 10 is configured to display images, videos, and the like. The screen 10 includes a light-transmitting cover plate 101 and a display screen 102. The light-transmitting cover plate 101 is stacked with the display screen 102 and fixedly connected with the display screen 102. The light-transmitting cover plate 101 is mainly configured to protect and prevent dust from entering the display screen 102. The material of the light-transmitting cover plate 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 display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a quantum dot light emitting diode (QLED) display screen, a liquid crystal display (LCD), and the like.

[0151] For example, the housing 20 is configured to protect the internal electronic devices of the electronic device 100. The housing 20 includes a back cover 201, a frame 202, and a camera decoration 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. Alternatively, the frame 202 can be integrally formed with the back cover 201, i.e., the frame 202 and the back cover 201 form an integral 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 accommodating space of the electronic device 100. The internal accommodating space accommodates the display screen 102.

[0152] The camera module 30 is configured to capture photos and / or videos. The camera module 30 can be located in the internal accommodating space of the electronic device 100. The number of the camera module 30 can be one or more, for example, two in the embodiment. The camera module 30 can be used as a rear camera module 30 or a front camera module 30.

[0153] The light entrance surface of the camera module 30 faces the back cover 201. The back cover 201 is provided with a mounting hole 2011, and the camera decoration cover 203 covers and is fixed to the mounting hole 2011. The camera decoration cover 203 is configured to protect the camera module 30. In some embodiments, the camera decoration cover 203 protrudes to the side of the back cover 201 away from the light-transmitting cover plate 101. In this way, the camera decoration cover 203 can increase the installation space of the camera module 30 in the thickness direction of the electronic device 100. In other embodiments, the camera decoration cover 203 can be flush with the back cover 201 or recessed into the internal accommodating space of the electronic device 100.

[0154] The camera decoration cover 203 is provided with a light-transmitting window 2031. The light-transmitting window 2031 allows the scene light to enter the light entrance surface of the camera module 30. That is, the light passes through the back cover and enters the camera module 30.

[0155] In the embodiment, the camera module 30 is used as a rear camera module 30 of the electronic device 100. The two camera modules 30 can be a camera module 301 and a camera module 302, respectively. The camera module 301 can be used as a rear main camera module 30, and the camera module 302 can be used as a rear variable focal length telephoto camera module 30. In other embodiments, the electronic device 100 can further include another camera module 30, which is used as a rear wide-angle camera module 30.

[0156] In other embodiments, the light entrance surface of the camera module 30 faces the light-transmitting cover plate 101. The display screen 102 is provided with a light path avoiding hole. The light path avoiding hole allows the scene light to pass through the light-transmitting cover plate 101 and enter the light entrance surface of the camera module 30. In this way, the camera module 30 is used as a front camera module 30 of the electronic device 100.

[0157] In some embodiments, as shown in FIG. 2, the electronic device 100 further includes a circuit board 50 and an image processor 60, which are located in the internal accommodation space of the electronic device 100, and the image processor 60 is fixed to and electrically connected to the circuit board 50. The image processor 60 is in communication connection with the camera module 30. The image processor 60 is configured 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 through electrical connection such as wiring, or data transmission through coupling. It can be understood that the camera module 30 and the image processor 60 can also be in communication connection through other data transmission modes.

[0158] In some embodiments, the electronic device 100 can further include an analog-to-digital converter (also referred to 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 configured to convert the signal generated by the camera module 30 into a digital image signal and transmit it to the image processor 60, and then the image processor 60 processes the digital image signal and finally displays the image or video on the screen 10.

[0159] In some embodiments, the electronic device 100 can further include a memory (not shown in the figure), which is in communication connection with the image processor 60. After the image processor 60 processes the image digital signal, the image processor 60 transmits the image to the memory, so that when the image needs to be viewed later, the image can be found in the memory at any time and displayed on the screen 10. In some embodiments, the image processor 60 can also compress the processed image digital signal and store it in the memory, so as to save memory space.

[0160] In other embodiments, the electronic device 100 can also not include the screen 10 and / or the camera decoration cover 203.

[0161] The electronic device 100 can have a width direction (X direction), a length direction (Y direction), and a thickness direction (Z direction), the length direction being perpendicular to the width direction, and the thickness direction being perpendicular to the width direction and the length direction. The display screen 102 and the housing 20 can be arranged relative to the thickness direction of the electronic device 100. At this time, the housing 20 can be perpendicular to the thickness direction of the electronic device 100.

[0162] It can be understood that the mounting position of the camera module 30 of the electronic device 100 shown in FIGS. 1 and 2 is only schematic, and the application does not strictly limit the mounting position of the camera module 30. In some other embodiments, the camera module 30 can also be mounted at other positions of the electronic device 100, for example, the camera module 30 can be mounted at the upper middle or upper right corner of the back of the electronic device 100. In some other embodiments, the electronic device 100 can include a terminal body and an auxiliary component capable of rotating, moving or detaching relative to the terminal body, and the camera module 30 can also be arranged on the auxiliary component.

[0163] Please refer to FIGS. 2 and 3, FIG. 3 is a schematic structural diagram of the camera module 30 shown in FIG. 2.

[0164] In some embodiments, the camera module 30 can include an optical lens 1 and a photosensitive element 2, and the photosensitive element 2 is located on the image side of the optical lens 1.

[0165] The photosensitive element 2 (also referred to as an image sensor) is a kind of semiconductor chip, and the surface contains hundreds of thousands to millions of photodiodes. When exposed to light, it will generate electric charges.

[0166] The photosensitive element 2 uses the photoelectric conversion function of the photoelectric device to convert the light image on its photosensitive surface into an electric signal in a corresponding proportional relationship with the light image. The photosensitive surface of the photosensitive element 2 faces the optical lens 1. The photosensitive element 2 can be a charge coupled device (CCD), a complementary metal-oxide semiconductor (CMOS), a phototransistor, or a thin-film transistor, etc. The charge coupled device is made of a high-sensitivity semiconductor material and can convert light into electric charges. The charge coupled device is composed of many photosensitive units, usually in units of millions of pixels. When the surface of the charge coupled device is exposed to light, each photosensitive unit reflects the electric charges on the component. The signals generated by all photosensitive units are added together to form a complete picture. The complementary metal-oxide semiconductor is mainly made of silicon and germanium, two elements of the semiconductor, so that the semiconductor coexists with N (band-electric) and P (band+ electric) levels on the complementary metal-oxide semiconductor. The current generated by the two complementary effects can be recorded and interpreted into images by the processing chip.

[0167] The optical lens 1 mainly uses the refraction principle of the lens to form an image, that is, the light rays of the scene pass through the optical lens 1 to form a clear image on the focal plane, and the image of the scene is recorded by the photosensitive element 2 located on the focal plane. For example, the optical lens 1 can be a long-focus lens, which can better capture scenes at a greater distance.

[0168] The optical lens 1 can be an upright lens or a periscope lens. The present embodiment takes the optical lens 1 as a periscope lens for example.

[0169] In some embodiments, the camera module 30 can further include a filter 3. The filter 3 can be located between the optical lens 1 and the photosensitive element 2.

[0170] The filter 3 is used to filter out the unnecessary wave band in the light, prevent the photosensitive element 2 from generating false color or moire, and improve the effective resolution and color restoration. For example, the filter 3 can be an infrared filter 3. In the present embodiment, the filter 3 is an independent component. In other embodiments, the filter 3 structure can be cancelled, and the surface treatment or material treatment is performed on at least one optical element of the telephoto lens to achieve filtering. The present application does not strictly limit the specific embodiments of the structure or structure used to achieve filtering.

[0171] In some embodiments, the camera module 30 can further include a housing 40. The photosensitive element 2 and the optical lens 1 can be installed in the internal space of the housing 40. The housing 40 can be provided with a light transmission port 401 for transmitting light to the optical lens 1.

[0172] In the present embodiment, the external light can pass through the optical lens 1 and irradiate the photosensitive surface of the photosensitive element 2. For example, the working principle of the camera module 30 is that the light reflected by the photographed object passes through the optical lens 1 and the filter 3 to generate an optical image on the photosensitive surface of the photosensitive element 2. The photosensitive element 2 converts the optical image into an electrical signal (i.e. an analog image signal) and transmits it to an analog-to-digital converter to convert it into a digital image signal to the image processor 60 (see FIG. 2).

[0173] Please refer to FIG. 4, which is a structural schematic diagram of the camera module 30 in some embodiments of FIG. 3.

[0174] In some embodiments, the optical lens 1 comprises a first lens group G1, a first folding element 4, and a moving lens group G2. The first lens group G1, the first folding element 4, and the moving lens group G2 are arranged in sequence along a direction from an object side to an image side. The optical lens 1 has a short focal length end and a long focal length end. It can be 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 can be understood that in the optical lens 1, external light enters the first lens group G1, is reflected by the first light path folding element, and then exits from the optical lens 1 after passing through the moving lens group G2. In the camera module 30, the exiting light from the optical lens 1 can be received by the photosensitive element 2 and imaged.

[0175] The first lens group G1 can comprise at least one face-type variable lens.

[0176] For example, the first lens group G1 can comprise only one face-type variable lens. Alternatively, the first lens group G1 can comprise one face-type variable lens and at least one face-type non-variable lens, or the first lens group G1 can comprise a plurality of face-type variable lenses and at least one face-type non-variable lens. For example, the number of lenses in the first lens group G1 can be 2, 3, 4, etc. When the first lens group G1 has a plurality of lenses, the aberration can be eliminated or reduced by the combination of different materials of the plurality of lenses, or the aberration can be eliminated or reduced by the combination of lenses with positive focal length and lenses with negative focal length. The number of lenses in the first lens group G1 is not strictly limited in this embodiment. For example, the optical axis direction of the first lens group G1 can be parallel to the Z direction.

[0177] For example, the face-type variable lens can change the focal length by changing the surface shape, thereby changing the curvature and the focal length of the lens. For example, the face-type variable lens can change the focal length by changing the shape of the object side surface and / or the image side surface. For example, the face-type variable lens can be a liquid lens, etc. After the focal length of the face-type variable lens is changed, the focal length of the first lens group G1 changes accordingly. The focal length of the face-type variable lens can be changed by changing the face type of the object side surface and / or the image side surface of the face-type variable lens.

[0178] The first folding element 4 is used to change the propagation direction of the light beam.

[0179] Exemplarily, the first turning element 4 is configured to change the propagating 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 turning element 4, and the second direction can be the direction in which the light beam exits the first turning element 4. It can be understood that the first turning 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 the first lens group G1, which can be parallel to the optical axis of the first lens group G1. The first turning element 4 is located on the object side of the moving lens group G2, and the light beam can enter the moving lens group G2 from the second direction; when the optical axis of the moving lens group G2 is not bent, the second direction can be parallel to the optical axis of the moving lens group G2.

[0180] Exemplarily, the first turning element 4 can be a prism, a mirror, or the like.

[0181] The moving lens group G2 can include at least one lens. Alternatively, the moving lens group G2 can also include multiple lenses. For example, the number of lenses of the moving lens group G2 can be 2, 3, 4, or the like. When the moving lens group G2 has multiple lenses, the aberration can be eliminated or reduced by the combination of different materials of the multiple lenses; or the aberration can be eliminated or reduced by the combination of lenses with positive focal power and lenses with negative focal power. The number of lenses of the moving lens group G2 is not strictly limited in the embodiment. Exemplarily, the direction of the optical axis of the moving lens group G2 can be parallel to the Y direction.

[0182] Exemplarily, the moving lens group G2 can refer to that the position of the lens group along the optical axis of the optical lens 1 can be changed to perform zooming or focusing. It can be understood that the position of the moving lens group G2 can be moved to a set position and kept relatively fixed. The moving lens group G2 can be driven by a voice coil motor or the like driving mechanism, so as to realize the movement.

[0183] When the optical lens 1 is at the short focal end, the optical lens 1 has a first lens focal length, and the first lens group G1 has a first focal length. At this time, the optical lens 1 can shoot the external scene at the short focal end. When the optical lens 1 is at the long focal end, the optical lens 1 has a second lens focal length, and the first lens group G1 has a second focal length. At this time, the optical lens 1 can shoot the external scene at the long focal end. That is, the first focal length is the focal length of the first lens group G1 at the short focal end, and the second focal length is the focal length of the first lens group G1 at the long focal end. The first lens focal length is the focal length of the optical lens 1 at the short focal end, and the second lens focal length is the focal length of the optical lens 1 at the long focal end.

[0184] The first lens focal length can be smaller than the second lens focal length, that is, the focal length of the optical lens 1 at the short focal end is smaller than the focal length of the optical lens 1 at the long focal end. At this time, the short focal end can be a wide-angle mode of the optical lens 1, and the long focal end can be a long focal mode of the optical lens 1. Alternatively, the short focal end and the long focal end are both long focal modes of the optical lens 1, and the long focal end is a long focal mode with a longer focal length.

[0185] The optical lens 1 can zoom between the short focal end and the long focal end. During zooming, the focal length of the first lens group G1 changes, and the position of the moving lens group G2 changes, so that the focal length of the optical lens 1 changes. For example, the face-type variable lens changes the face type, the first lens group G1 changes from the first focal length to the second focal length, the moving lens group G2 moves along the optical axis by moving, and the focal length of the optical lens 1 changes from the first lens focal length to the second lens focal length, and the optical lens 1 changes from the short focal end to the long focal end. Similarly, the optical lens 1 changes from the long focal end to the short focal end can be the reverse of the above process. The first lens focal length and the second lens focal length can be the limit focal lengths of the zooming range of the optical lens 1, but are not strictly limited thereto.

[0186] It can be understood that there is an intermediate state during the switching of the optical lens 1 between the short focal end and the long focal end, the focal length of the optical lens 1 in the intermediate state is within the range of the first lens focal length and the second lens focal length, and the optical lens 1 can also clearly image. At this time, the optical lens 1 can be in an intermediate shooting mode. The optical lens 1 can achieve continuous lossless zooming from the short focal end to the long focal end.

[0187] Specifically, as an example, the face-type variable lens can change its curvature by means of electro-deformation driving, that is, by applying current to the face-type variable lens, the curvature of the face-type variable lens can be changed to change the focal length of the face-type variable lens, so that the first lens group G1 realizes focal length adjustment, and then the focal length of the optical lens 1 can be adjusted, so that optical zooming can be realized in a smaller space range. When optical zooming is performed, changing the curvature of any face-type variable lens can achieve optical zooming of the optical lens 1. In some embodiments, when the first lens group G1 includes multiple face-type variable lenses, multiple face-type variable lenses can be cooperated to realize multiple zooming. In some other embodiments, the face-type variable lens can change its curvature by means of force-deformation driving, and then change the focal length of the first lens group G1.

[0188] When the optical lens 1 is zoomed, the optical lens 1 can focus by moving the moving lens group G2 to obtain a clearer image. The optical lens can focus and image at the long focal end, the short focal end, or the intermediate shooting mode. The moving lens group G2 can move during zooming and focusing, which can reduce the setting of components for driving the movement of each lens group, and is conducive to simplifying the structure of the optical lens 1.

[0189] In the embodiment, by changing the surface shape of the surface-shape-variable lens, and further changing the curvature of the first lens group G1, in cooperation with the movement of the moving lens group G2, the focal length of the optical lens 1 is changed, and lossless zooming is achieved. When the optical lens 1 shoots external scenes through the short-focus end, it has a shorter focal length and a larger field of view angle, which is convenient for shooting scenes at a closer distance and a wider range, and the foreground is more prominent. When the optical lens 1 shoots external scenes through the long-focus end, it has a longer focal length and a smaller field of view angle, which is convenient for shooting details of distant scenes and objects that are not easy to approach. The optical lens 1 has different focal lengths, which enables the optical lens 1 to use different focal lengths for shooting in different shooting scenes, realizes optical zooming of different focal lengths, that is, lossless optical zooming, which is conducive to obtaining higher-quality images, and the scene adaptability of the optical lens 1 is better, and the shooting experience of the user is greatly improved; and multiple camera modules 30 do not need to be arranged in the electronic device to realize shooting of different focal lengths, thereby reducing the volume of the camera module 30.

[0190] The first lens group G1 has a surface-shape-variable lens, which makes the focal length of the first lens group G1 variable. The change of the focal length of the first lens group G1 has a greater impact on the focal length of the optical lens 1, that is, a smaller change of the focal length of the first lens group G1 has a greater impact on the focal length of the optical lens 1, thereby easily enabling the optical lens 1 to have a larger zooming range. Moreover, through the variable focal length capability of the first lens group G1 and the cooperation of the moving lens group G2, the optical lens 1 can be continuously and losslessly zoomed between the first lens focal length and the second lens focal length, and the optical lens 1 has a strong zooming capability and has a high imaging quality at different focal lengths. By arranging the first turning element 4, the propagation direction of the light beam is changed, which is conducive to reducing the size in the second direction, and further conducive to reducing the length of the optical lens 1, and conducive to the miniaturization design of the optical lens 1.

[0191] It can be understood that the image side of the first turning element 4 can only have the moving lens group G2. In some embodiments, the object side of the first turning element 4 can also have a larger number of lens groups.

[0192] In some embodiments, the optical lens 1 can satisfy: FOVW / FOVT>1.1.

[0193] FOVW is the field of view angle of the optical lens 1 at the short-focus end, and FOVT is the field of view angle of the optical lens 1 at the long-focus end. The optical lens 1 changes between the short-focus end and the long-focus end, and the field of view angle of the optical lens 1 can also change between FOVW and FOVT, and can image the corresponding field of view angle therebetween. At this time, the field of view angle of the optical lens 1 at the short-focus end is larger, and the optical lens 1 is convenient for shooting closer distance scenes; the field of view angle of the optical lens 1 at the long-focus end is smaller, and the optical lens 1 is convenient for shooting farther distance scenes; thereby making the adaptability of the optical lens 1 stronger, and both have higher imaging quality.

[0194] In some examples, the optical lens 1 satisfies: FOVW / FOVT>1.5. At this time, the field of view angle FOVW of the optical lens 1 at the short-focus end and the field of view angle FOVT of the optical lens 1 at the long-focus end have a larger difference, the change range of the field of view angle of the optical lens 1 is larger, and the adaptability of the optical lens 1 is stronger.

[0195] For example, the half field of view angle HFOVW of the optical lens 1 at the short-focus end and the field of view angle HFOVT of the optical lens 1 at the long-focus end can be: HFOVW is 17.6°, HFOVT is 11°, FOVW / FOVT is 1.6; or HFOVW is 17.7°, HFOVT is 11°, FOVW / FOVT is 1.59; or HFOVW is 18.59°, HFOVT is 11.16°, FOVW / FOVT is 1.67; or HFOVW is 19.15°, HFOVT is 9.21°, FOVW / FOVT is 2.08.

[0196] In some examples, the first lens group G1 of the optical lens 1 can satisfy: 0.8

[0197] During the zooming process of the optical lens 1, the focal length of the first lens group G1 changes, and the change of the focal length of the first lens group G1 will also affect the moving distance of the moving lens group G1 and also affect the imaging aberration. Moreover, the change of the focal length of the first lens group G1, together with the movement of the moving lens group G2, changes the focal length of the optical lens, realizing zooming. In general lenses, a smaller focal length of a lens means that the lens can have a smaller total optical length, and a larger focal length of a lens means that the lens needs a larger total optical length. Therefore, in the embodiment, the optical lens 1 can zoom, that is, the optical lens 1 has both a smaller focal length and a larger focal length, and thus the optical lens 1 needs to have a suitable total 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-focus end and the second focal length f1t of the first lens group G1 at the long-focus end, the optical lens 1 has a larger zooming capability in a small size, and the image quality of the optical lens 1 at different focal lengths is balanced.

[0198] 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-focus end and a larger second lens focal length at the long-focus end; and the first lens group G1 has a smaller first focal length f1w at the short-focus end and a larger second focal length f1t at the long-focus end (that is, f1w is smaller than f1t), and the sizes of the first focal length f1w and the second focal length f1t respectively match the sizes 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-focus end to the long-focus end, the focal length of the first lens group G1 changes from a smaller first focal length to a larger second focal length, the moving lens group G2 moves towards the object side, and the optical lens 1 changes from a smaller first lens focal length to a larger second lens focal length. The zooming logic of the first lens group G1 is more suitable for 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 to balancing the aberration.

[0199] For example, the value of f1w / f1t can be 0.91, 0.93, 0.95, 0.97, 0.99, etc.

[0200] For example, when the total 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 change from the short-focus end to the long-focus end is less than 5.5 mm.

[0201] 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 first lens group G1 has weak refractive power, which is beneficial to compatibility of the optical lens 1 with a larger optical total length. The first lens group G1 has a smaller second focal length f1t (i.e., f1w is greater than f1t) at the long focal end, and the first lens group G1 has strong refractive power, which is beneficial to compatibility of the optical lens 1 with a smaller optical total length. Since the optical total length of the optical lens 1 is constant, and the optical lens 1 needs to be compatible with both the short focal end with a shorter focal length (first lens focal length) and the long focal end with a longer focal length (second lens focal length). Therefore, by reasonably setting the ratio of the first focal length f1w and the second focal length f1t, the optical lens 1 is easy to be compatible with a longer focal length and a shorter focal length under a smaller optical total length, or the optical lens 1 is easy to have a smaller optical total length under a certain zoom ratio, that is, it is beneficial to balance the optical total length and the zoom ratio of the optical lens 1, and it is easy to make the optical lens 1 have a smaller optical total length and a larger zoom ratio, so that the structure design of the optical lens 1 is easier to realize. 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.

[0202] In the process of changing the optical lens 1 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, the moving lens group G2 moves towards 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.

[0203] 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.

[0204] 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.

[0205] In some embodiments, the optical lens 1 can satisfy: TTL / (EFLT+EFLW) < 1. Wherein, TTL is the total optical length of the optical lens 1, EFLW is the first lens focal length, and EFLT is the second lens focal length. The first lens focal length EFLW and the second lens focal length EFLT of the optical lens 1 both have an impact on the total optical length TTL, and the values of the three are coupled with 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 and 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.

[0206] 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 and 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 take into account both a smaller total optical length and a larger second lens focal length EFLT.

[0207] Wherein, 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.

[0208] Wherein, 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.

[0209] Wherein, 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.

[0210] Wherein, 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.

[0211] In some embodiments, the optical lens 1 can satisfy: EFLT / IMH>2. Wherein, IMH is the half image height of the optical lens 1. At this time, it is beneficial to make the optical lens 1 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.

[0212] In some embodiments, the optical power of the first lens group G1 can be positive. The first lens group G1 can not change the direction of the optical axis, and the first lens group G1 can converge light rays, thereby facilitating focusing of the optical lens 1. Wherein, the optical power of the first lens group G1 being positive can mean that the optical power of the first lens group G1 at least at the short focus end is positive. At this time, the first lens group G1 can converge the light beam, reduce the lens aperture of the moving lens group G2, thereby facilitating the reduction of the size of the optical lens 1.

[0213] It can be understood that the above-mentioned limitation on the ratio of the field of view angle FOVW of the optical lens 1 at the short focus end to the field of view angle FOVT at the long focus end, 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 of each other, or can be combined with each other. When the above-mentioned multiple ratio ranges are combined with each other, the optical lens 1 can obtain better focusing ability, imaging quality and processability, and can have stronger zooming capability in a smaller volume; wherein, in some embodiments, the camera module 30 can realize both long-distance shooting and macro shooting through the optical lens 1, for example, the nearest object distance of macro shooting can be 10 cm, 5 cm or 3 cm. For example, macro shooting can be realized by further focusing at the long focus end.

[0214] In some embodiments, when the optical lens 1 changes from the short focus end to the long focus end, the radius of curvature of the object side of the face-variable lens decreases, and / or the reciprocal of the radius of curvature of the image side of the face-variable lens increases.

[0215] Wherein, changing the face type of the object side or the image side of the face-variable lens alone can change the focal length of the face-variable lens.

[0216] When the radius of curvature of the object side of the face-variable lens decreases, it is beneficial to make the focal length of the face-variable lens decrease. For example, the object side of the face-variable lens is a convex surface, and when its radius of curvature decreases, its convexity is greater.

[0217] When the reciprocal of the curvature radius of the image side surface of the face-type variable lens increases, it is beneficial to increase the focal length of the face-type variable lens. For example, when the reciprocal of the curvature radius of the convex surface of the object side surface of the face-type variable lens increases, the convexity of the convex surface decreases or changes to a concave surface. When the reciprocal of the curvature radius of the concave surface of the object side surface of the face-type variable lens increases, the concavity of the concave surface increases.

[0218] In addition, the face type of the object side surface and the face type of the image side surface of the face-type variable lens can be changed synchronously, so as to change the focal length of the face-type variable lens. At this time, the focal length of the face-type variable lens can increase or decrease, which can be set according to the requirement of the focal length of the face-type variable lens. Synchronously changing the face type of the object side surface and the face type of the image side surface of the face-type variable lens can change the focal length of the face-type variable lens, and is beneficial to the cooperation of the object side surface and the image side surface, so as to balance the aberration.

[0219] In some embodiments, the optical lens 1 can satisfy: 3.5<(R1W1+R1T1) / (CT)<7.

[0220] In the formula, R1W1 is the curvature radius of the object side surface of the face-type variable lens of the first lens group G1 at the short focal length end, R1T1 is the curvature radius of the object side surface of the face-type variable lens of the first lens group G1 at the long focal length end, and CT is the moving distance of the moving lens group G2 from the short focal length end to the long focal length end.

[0221] For example, the value of R1W1+R1T1 can be greater than 25 mm.

[0222] For example, the value of CT can be greater than 4 mm. The value of CT can be less than 9 mm. However, it is not limited thereto.

[0223] The curvature radius of the object side surface of the first lens group G1 has an effect on the focal length of the optical lens 1, and the moving distance of the moving lens group G2 has an effect on the focal length of the optical lens 1. Therefore, in order to realize the zoom of the optical lens 1, the object side surface of the first lens group G1 can have different curvature radii at the short focal length end and the long focal length end, and the moving lens group G2 can have different positions at the short focal length end and the long focal length end, and by limiting the relationship between R1W1, R1T1 and CT, the optical lens 1 has a large zoom range.

[0224] When the value of R1W1 and R1T1 is large, the power of the face type variable lens at the short focal length end and the long focal length end is small, which makes the first focal length of the first lens group G1 at the short focal length end more easily match the first lens focal length of the optical lens 1, and further makes the first lens focal length more easily match the optical total length. At this time, the optical lens 1 is more easily provided with a smaller first lens focal length, which is beneficial to the design of a larger zoom ratio of the optical lens 1, and also makes the optical lens 1 have a better wide-angle shooting effect. If the value of CT is small, the moving distance of the moving lens group G2 is small, which is beneficial to the design of a smaller space reserved for the optical lens 1 to move the moving lens group G2, and further beneficial to the design of a smaller optical total 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 associated with the movement of the moving lens group G2, and further the optical lens 1 has a larger zoom ratio, a smaller optical total length, and is also easy to design other parameters of the optical lens 1.

[0225] Please refer to FIG. 4 and FIG. 5, FIG. 5 is a structural schematic diagram of the camera module 30 in different shooting modes in some embodiments.

[0226] In some embodiments, the optical lens 1 can 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 moving lens group G2 are arranged in sequence along the object side to the image side.

[0227] In some embodiments, the moving lens group G2 can move along the optical axis.

[0228] The second lens group G3 can include at least one lens. For example, the optical power of the second lens group G3 can be negative. The second lens group G3 can not change the direction of the optical axis, and the second lens group G3 can diverge the light rays. The second lens group G3 can include one lens. The second lens group G3 can also include multiple lenses, for example, 2, 3, 4, etc. When the second lens group G3 has multiple lenses, the aberration can be eliminated or reduced by the combination of different materials of the multiple lenses, or the aberration can be eliminated or reduced by the combination of lenses with positive optical power and lenses with negative optical power. The number of lenses of the second lens group G3 is not strictly limited in the embodiment.

[0229] For example, the second lens group G3 in the optical lens 1 can be fixed or movable, which is not strictly limited in the embodiment. For example, the optical axis of the second lens group G3 can be parallel to the Y direction.

[0230] The third lens group G4 can include at least one lens. For example, the third lens group G4 has positive focal power. The third lens group G4 can not change the direction of the optical axis, and the third lens group G4 can focus light, further facilitating focusing of the optical lens 1. The third lens group G4 can include one lens. The third lens group G4 can also include multiple lenses, for example, 2, 3, 4, or the like. When the third lens group G4 has multiple lenses, the combination of different materials of the multiple lenses can be used to eliminate or reduce aberration, or the combination of lenses with positive focal power and lenses with negative focal power can be used to eliminate or reduce aberration. The number of lenses in the third lens group G4 is not strictly limited in this embodiment.

[0231] For example, the third lens group G4 can be fixed or movable in the optical lens 1, and the embodiment is not strictly limited. For example, the optical axis of the third lens group G4 can be parallel to the Y direction.

[0232] For example, when the optical lens 1 changes from a short focal length end to a long focal length end, the moving lens group G2 moves along the optical axis. The moving lens group G2 can move towards the object side. The moving lens group G2 can be driven by a driving component to move along the optical axis. For example, the optical axis of the moving lens group G2 is parallel to the second direction, and the moving lens group G2 can move towards the third lens group G4 along the second direction.

[0233] In this embodiment, the optical lens 1 changes from a short focal length end to a long focal length end, and the moving lens group G2 changes the focal length of the optical lens 1 by moving. Since the moving lens group G2 is close to the image plane, the compensation ability of the moving lens group G2 is strong, and moving the moving lens group G2 is beneficial to the zooming of the optical lens 1 and the compensation of aberration.

[0234] In some embodiments, the second lens group G3 is a fixed lens group, and the third lens group G4 is movable. For example, when the optical lens 1 zooms, the third lens group G4 and the moving lens group G2 can move towards the object side along the optical axis; the third lens group G4 and the moving lens group G2 are moved to zoom, the adjustment ability of the moving lens group G2 is stronger, which is beneficial to improve the zooming ability, the ability to balance aberration is stronger, which is beneficial to improve the image quality.

[0235] 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 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 are all movable along the optical axis towards the object side. Compared with moving the third lens group G4 and the movable lens group G2, moving the three lens groups is equivalent to moving the lens groups behind the first turning element 4, and has stronger adjustment ability and stronger ability to balance aberrations, which is beneficial to making the zooming ability of the optical lens 1 stronger and the image quality better.

[0236] In some embodiments, the first turning element 4 can include an entrance surface 41, a reflection surface 42 and an exit surface 43. The entrance surface 41 can be perpendicular to the optical axis direction of the first lens group G1 and face the first lens group G1. The exit surface 43 can be perpendicular to the second lens group G3 and face the second lens group G3. The reflection surface 42 receives the light beam from the entrance surface 41 and reflects the light beam out of the exit surface 43, so as to change the propagation direction of the light beam from the optical axis direction of the first lens group G1 to the optical axis direction of the second lens group G3. For example, the first turning element 4 can be a prism.

[0237] In some embodiments, the optical lens 1 can further include a second turning element 5. The second turning element 5 can be located on the image side of the movable lens group G2, and the second turning element 5 is used to change the light beam from the second direction to the third direction, and the third direction has an angle with the second direction. The second turning element 5 can have an entrance surface 51, a reflection surface 52 and an exit surface 53. The entrance surface 51 can be perpendicular to the second direction, and the exit surface 53 can be perpendicular to the third direction.

[0238] For example, the second direction can be perpendicular to the third direction. The entrance surface 51 of the second turning element 5 can be arranged towards the movable lens group G2. In the first direction, the exit surface 53 of the second turning element 5 can be located on the side of the optical axis of the movable lens group G2 away from the first lens group G1. At this time, the half image height of the optical lens 1 can not be limited by the size of the optical lens 1 in the first direction, so as to facilitate setting a larger half image height and obtaining a higher quality image.

[0239] It is easy to understand that the photosensitive element 2 of the camera module 30 can be arranged towards the exit 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 movable lens group G2 away from the first lens group G1 in the first direction. When the half image height of the optical lens 1 is larger, the size of the photosensitive element 2 can be correspondingly set larger, so as to facilitate the camera module 30 to obtain a higher quality image.

[0240] Further, the photosensitive element 2 can be configured to move in a direction perpendicular to the optical axis of the photosensitive element 2 during the anti-shake process of the camera module 30. At this time, the anti-shake is achieved by moving the photosensitive element 2, which facilitates the arrangement of the anti-shake driving component on the photosensitive element 2, is conducive to simplifying the structure of the optical lens 1, and makes the layout of the camera module 30 more reasonable. In some other embodiments, the anti-shake can also be achieved by moving the optical elements in the optical lens 1.

[0241] As shown in FIG. 5, when the optical lens 1 is at the short-focus end, the first lens group G1 can have a first focal length, the moving lens group G2 can be located at the first position, and the optical lens 1 has a first lens focal length.

[0242] When the optical lens 1 is at the long-focus end, the first lens group G1 can have a second focal length, the moving lens group G2 can be located at the second position, and the optical lens 1 has a second lens focal length.

[0243] Between the short-focus end and the long-focus 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 moving lens group G2 can be located at 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, and 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.

[0244] Thus, the optical lens 1 can be switched between the short-focus end and the long-focus end, and can be continuously zoomed without loss, and can be imaged in the mode between the short-focus end and the long-focus end, so that the optical lens 1 can be continuously zoomed without loss.

[0245] In some embodiments, the total optical length TTL of the optical lens 1 can be less than 30 mm. At this time, the optical lens 1 has a smaller length, which is conducive to making the volume of the camera module 30 smaller, so as to be applied 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.

[0246] In some embodiments, the optical lens 1 can satisfy: 0.5 < R2L2 / R3L1 < 1.2. Wherein, R2L2 is the curvature radius of the image side surface of the second lens group G3, and R3L1 is the curvature radius of the object side surface of the third lens group G4. The image side surface of the second lens group G3 and the object side surface of the third lens group G4 are two adjacent surfaces, and the light beam is emitted from the image side surface of the second lens group G3 and then enters the third lens group G4 through the object side surface of the third lens group G4. At this time, by reasonably setting the curvature radius of the image side surface of the second lens group G3 and the curvature radius of the object side surface of the third lens group G4, the light beam propagates more smoothly in the second lens group G3 and the third lens group G4, which is beneficial to reduce aberration and thus improve the image quality of the optical lens 1.

[0247] In some embodiments, the optical lens 1 can satisfy: 1.2 < (L2+L3) / CT1W < 2.4. Wherein, 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 focus 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 ray passes through the second lens group G3 and the third lens group G4 more smoothly, which is beneficial to improve the optical quality and the imaging effect.

[0248] In some embodiments, the optical lens 1 can satisfy: 0.2 < |f4| / EFLT < 0.4. Wherein, f4 is the focal length of the moving lens group G2. At this time, by reasonably setting the focal length of the moving lens group G2, it is convenient to simplify the focal length setting of the second lens group G3 and the third lens group G4, so as to be easily adapted to the first lens group G1, thereby simplifying the design, and thus being beneficial to make the optical lens 1 have stronger zoom capability.

[0249] 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.

[0250] In some embodiments, the optical lens 1 can satisfy: 0.2 < |f3| / EFLT < 0.3. Wherein, 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, thereby being beneficial to make the optical lens 1 have stronger zoom capability.

[0251] 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.

[0252] In some embodiments, the last lens group of the optical lens 1 can have a negative focal power. For example, the mobile lens group G2 can have a negative focal power. In this case, the total focal power of the lenses before the last lens group can be positive, i.e., the total focal power of the first lens group G1, the second lens group G3 and the third lens group G4 is positive. In this case, the total optical length of the optical lens 1 can be reduced.

[0253] For example, when the first lens group G1 has a positive focal power, the second lens group G3 can have a negative focal power, and the third lens group G4 can have a positive focal power, in combination with the mobile lens group G2 having a negative focal power, the focal power of the optical lens 1 can be reasonably divided, the optical lens 1 can have strong zoom capability and small total optical length, and the aberration of the optical lens 1 can be well balanced, so that the optical lens 1 has better image quality.

[0254] It can be understood that, at the short focal end, the distance between the mobile lens group G2 and the second folding element 5 is CTW, and at the long focal end, the distance between the mobile lens group G2 and the second folding element 5 is CTT.

[0255] In this case, CT can be the difference between CTT and CTW. The optical lens 1 can satisfy 3.5 < (R1W1+R1T1) / (CTT-CTW) < 7.

[0256] Please refer to FIG. 6, which is a structural schematic diagram of the camera module 30 shown in FIG. 4 in some embodiments. The camera module 30 in the embodiment of FIG. 6 can include most of the technical features of the camera module 30 in the embodiment of FIG. 5. The same technical features of the two embodiments will not be described again, and the differences between the two embodiments will be mainly described below.

[0257] The main difference between the camera module 30 in the embodiment of FIG. 6 and the camera module 30 in the embodiment of FIG. 5 is the arrangement of the second folding element 5 and the photosensitive element 2. In some embodiments, the light exit surface 53 of the second folding element 5 can be located on the same side of the optical axis of the mobile lens group G2 as the first lens group G1. For example, the third direction is parallel to the optical axis direction of the first lens group G1, i.e., the third direction is parallel to the first direction (Z direction). The light exit surface 53 of the second folding element 5 can be perpendicular to the third direction, i.e., the light exit surface 53 of the second folding element 5 can be parallel to the light entrance surface 41 of the first folding element 4.

[0258] In this case, the light can enter the second folding element 5 through the light entrance surface 51, be reflected by the reflecting surface 52, and exit the optical element through the light exit surface 53.

[0259] The highest point of the optical lens 1 in the direction of the optical axis of the first lens group G1 is easily affected by the first lens group G1. At this time, the light rays are emitted by the light exit surface 53 of the second turning element 5 in the third direction, and since the light exit 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; the height space occupied by the first lens group G1 in the direction of the optical axis is reused, so that no additional space is needed for the imaging surface and the photosensitive element 2, thereby facilitating the position setting of the photosensitive element 2, thereby facilitating the reduction of the height of the optical lens 1 in the third direction, and facilitating the miniaturization design.

[0260] In the embodiment, by setting the second turning 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; and the second turning element 5 can also facilitate the position setting of the imaging surface, thereby facilitating the position setting of the photosensitive element 2 in the camera module 30, and also facilitating the setting of a larger photosensitive element 2, thereby making the imaging quality higher.

[0261] It can be understood that the photosensitive element 2 in the camera module 30 can be perpendicular to the third direction to better image. At this time, the light beams are emitted by the second turning element 5 of the optical lens 1 and received by the photosensitive element 2, thereby imaging.

[0262] Please refer to FIG. 7, which is a structural schematic diagram of the camera module 30 in some other embodiments of FIG. 4. The camera module 30 in the embodiment of FIG. 7 can include most of the technical features of the camera module 30 in the embodiment of FIG. 5. The same technical features of the two will not be described here, and the differences between the two will be mainly described below.

[0263] The main difference between the camera module 30 in the embodiment of FIG. 7 and the camera module 30 in the embodiment of FIG. 5 lies in the setting of the second turning element 5 and the photosensitive element 2. In some embodiments, the light exit surface 53 of the second turning element 5 can intersect the optical axis of the moving lens group G2. For example, the third direction can intersect the first direction, that is, the third direction has an angle with the Z direction and the Y direction. The light exit surface 53 can be perpendicular to the third direction.

[0264] In which, the light rays can enter the second turning element 5 by the light entrance surface 51, be reflected to the reflecting surface 52 by the light exit surface 53, and then be emitted from the optical lens 1 by the light exit surface 53 after being reflected by the reflecting surface 52.

[0265] In this embodiment, the light exit surface 53 is arranged to be inclined, and the size of the optical lens 1 in the first direction is limited less by the half image height of the optical lens 1, so that a larger half image height can be arranged, and a higher quality image can be obtained. In addition, the light rays are reflected multiple times in the second turning element 5, and the second turning element 5 folds the light rays, so that the total optical length can be shortened.

[0266] Some specific but non-limiting examples of the present application will be described in more detail below by means of five embodiments in conjunction with Figs. 8 to 22c.

[0267] Embodiment one

[0268] Reference is made to Tables la, lb, lc and Id, wherein Table la shows the values of the radius of curvature (R), thickness, effective focal length, refractive index (at a wavelength of 587.56 nm), and Abbe number of each lens and reflective element of the camera module 30 shown in Fig. 8 in another possible embodiment at the short focal length end and the long focal length end. The thickness includes the thickness of the structure itself and the spacing between structures. Some parameters of the camera module 30 have different values at the short focal length end and the long focal length end, which are denoted by A to H. The values of A to H at the short focal length end and the long focal length end are shown in Table lb.

[0269] Tables lc and Id show the conic constant K and aspheric constant of each lens in a possible embodiment of the camera module 30 shown in Fig. 8. Since the surface type of the first lens LI is variable, the conic constant K and aspheric constant at the short focal length end and the long focal length end are shown separately. At the short focal length end, the surface number 1 of the first lens LI is denoted by surface number la, and the surface number 2 is denoted by surface number 2a. At the long focal length end, the surface number 1 of the first lens LI is denoted by surface number lb, and the surface number 2 is denoted by surface number 2b.

[0270] Table la

[0271] Table lb

[0272] Table lc

[0273] Table Id

[0274] The aspheric surfaces in the optical lens 1 in Tables la, lb, lc and Id can be defined by, but not limited to, the following aspheric surface equation:

[0275] Wherein, z is the relative distance of a point on the aspherical surface with a distance r from the optical axis to the tangent plane of the intersection point on the aspherical surface optical axis; r is the vertical distance of a point on the aspherical curve to the optical axis; c is the curvature; k is the conic coefficient; ai is the i-th order aspherical coefficient, which can be referred to Table 1b and Table 1c. Wherein, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9, the tenth lens L10 and the eleventh lens L11 are all aspherical lenses.

[0276] Please refer to Table 1e, which is the basic parameters of the camera module 30 shown in Figure 8 in a possible embodiment. Wherein, IMH 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 wide-angle 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 wide-angle end, HFOV T is the half field of view of the optical lens 1 at the telephoto end, HFOV W is the half field of view of the optical lens 1 at the wide-angle end, TTL is the total optical length of the optical lens 1, TTH is the total optical height of the optical lens 1, f1w is the focal length of the first lens group G1 at the wide-angle end, f1t is the focal length of the first lens group G1 at the telephoto end, f2 is the focal length of the second lens group G3, f3 is the focal length of the third lens group G4, f4 is the focal length of the moving lens group G2. Wherein, the values of f1w, f1t, f2, f3, f4, FNOT, FNOW are all effective values.

[0277] Table 1e

[0278] Please refer to Figure 8, which is the structural schematic diagram of the camera module 30 shown in Figure 4 in some specific embodiments.

[0279] In this embodiment, the optical lens 1 includes the first lens group G1, the first folding element 4, the second lens group G3, the third lens group G4 and the moving lens group G2.

[0280] Wherein, the first lens group G1, the first folding element 4, the second lens group G3, the third lens group G4 and the moving lens group G2 can be arranged in order from the object side to the image side. The second lens group G3, the third lens group G4 and the moving lens group G2 can be arranged along the optical axis direction of the second lens group G3, that is, the optical axes of the second lens group G3, the third lens group G4 and the moving lens group G2 can coincide; the optical axis direction of the first lens group G1 can be perpendicular to the optical axis direction of the second lens group G3.

[0281] Wherein, the optical power of the first lens group G1 can be positive. The first lens group G1 can include a piece of face type variable lens, that is, the first lens L1.

[0282] The focal power of the second lens group G3 can be negative. The second lens group G3 can include three lenses, in order, 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 can be arranged along an object side to an image side direction and can be relatively fixed. The position of the second lens group G3 in the optical lens 1 can be fixed during zooming.

[0283] The focal power of the third lens group G4 can be positive. The third lens group G4 can include four lenses, in order, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. The fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8 can be arranged along an object side to an image side direction and can be relatively fixed. The third lens group G4 can be movable along the optical axis.

[0284] The focal power of the moving lens group G2 can be negative. The moving lens group G2 can include three lenses, in order, a ninth lens L9, a tenth lens L10, and an eleventh lens L11. The ninth lens L9, the tenth lens L10, and the eleventh lens L11 can be arranged along an object side to an image side direction and can be relatively fixed. The moving lens group G2 can be movable along the optical axis.

[0285] The first turning element 4 can be a prism. For example, the first turning element 4 can include an entrance surface 41, a reflection surface 42, and an exit surface 43. The entrance surface 41 can be perpendicular to the optical axis direction of the first lens group G1 and face the first lens group G1. The exit surface 43 can be perpendicular to the second lens group G3 and face the second lens group G3. The reflection surface 42 receives the light beam from the entrance surface 41 and reflects the light beam to the exit surface 43, thereby changing the propagation direction of the light beam from the optical axis direction of the first lens group G1 to the optical axis direction of the second lens group G3. At this time, the optical axis direction of the first lens group G1 is the first direction, and the optical axis direction of the second lens group G3 is the second direction.

[0286] For example, the optical lens 1 can further include a second turning element 5. The second turning element 5 is located on the image side of the moving lens group G2. The second turning element 5 can have an entrance surface 51, a reflection surface 52, and an exit surface 53. The entrance surface 51 of the second turning element 5 can be arranged to face the moving lens group G2. The exit surface 53 of the second turning element 5 can be located on the same side of the optical axis of the moving lens group G2 as the first lens group G1. It can be understood that in the camera module 30, the optical filter 3 and the photosensitive element 2 can face the exit surface 53 of the second turning element 5 and be arranged parallel to the exit surface 53.

[0287] In the embodiment, the surface type of the first lens L1 is changed during the process of changing the optical lens 1 from the short focal end to the long focal end, and the first lens L1 is changed from the first focal length to the second focal length; the moving lens group G2 moves towards the third lens group G4, and the third lens group G4 moves towards the second lens group G3, that is, the third lens group G4 and the moving lens group G2 both move along the optical axis towards the object side; and the optical lens 1 is changed from the first lens focal length to the second lens focal length.

[0288] In the embodiment, the surface type of the surface type variable lens is changed, and then the curvature of the first lens group G1 is changed, and the moving lens group G2 is moved to change the focal length of the optical lens 1, so as to realize lossless zooming. When the optical lens 1 shoots external scenes through the short focal end, it has a shorter focal length and a larger field of view, which is convenient for shooting scenes at a closer distance and a wider range, and the foreground is more prominent. When the optical lens 1 shoots external scenes through the long focal end, it has a longer focal length and a smaller field of view, which is convenient for shooting details of distant scenes and objects that are not easy to approach. The optical lens 1 has different focal lengths, so that the optical lens 1 can be used for shooting in different shooting scenes, different focal length optical zooming is realized, that is, lossless optical zooming is realized, which is beneficial to obtain higher quality images, the scene adaptability of the optical lens 1 is better, and the shooting experience of the user is greatly improved; and multiple camera modules 30 do not need to be arranged in the electronic device to realize shooting with different focal lengths, so as to reduce the volume of the camera module 30.

[0289] The first lens group G1 has a surface type variable lens, so that the focal length of the first lens group G1 is variable. The change of the focal length of the first lens group G1 has a greater influence on the focal length of the optical lens 1, that is, a smaller change of the focal length of the first lens group G1 has a greater influence on the focal length of the optical lens 1, so that the optical lens 1 is easy to have a larger zoom range. Moreover, through the variable focal length of the first lens group G1 and the cooperation of the third lens group G4 and the moving lens group G2, the optical lens 1 can continuously zoom without loss between the first lens focal length and the second lens focal length, so that the optical lens 1 has a strong zooming capability and has a high imaging quality at different focal lengths. By arranging the first folding element 4, the propagation direction of the light beam is changed, which is beneficial to reduce the size in the second direction, and then beneficial to reduce the length of the optical lens 1, and beneficial to the miniaturization design of the optical lens 1.

[0290] Through the cooperation of the focal power and focal length of the first lens group G1, the first folding 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 zooming capability to perform a large range of optical zooming; and the optical lens 1 has a good image quality; in addition, the optical lens 1 has a small length and volume.

[0291] The ratio of the field of view FOVW of the short focal end of the optical lens 1 to the field of view FOVT of the long focal end, i.e. the value of FOVW / FOVT, is 1.6.

[0292] The value of the zoom ratio EFLT / EFLW is 1.655.

[0293] The ratio of the first focal length f1w to the second focal length f1t of the first lens group G1, i.e. the value of f1w / f1t, is 0.97. That is, the focal length of the first lens group G1 increases during the change from the short focal end to the long focal end.

[0294] 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, i.e. the value of TTL / (EFLT+EFLW), is 0.6.

[0295] The ratio of the second lens focal length EFLT to the half image height IMH, i.e. the value of EFLT / IMH, is 3.07.

[0296] Referring to Table 1b, the radius of curvature (A) of the object side surface of the first lens L1 changes from 18.57 mm to 10.96 mm during the change of the optical lens 1 from the short focal end to the long focal end, and the value decreases. The radius of curvature (B) of the image side surface of the first lens L1 changes from -52.03 mm to 44.17 mm, and the reciprocal of the value increases.

[0297] 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 end and the radius of curvature R1T1 at the long focal end to the distance CT moved by the moving lens group G2 during the change from the short focal end to the long focal end, i.e. the value of (R1W1+R1T1) / (CT), is 6.15. The value of CT is 4.8 mm.

[0298] The ratio of the radius of curvature R2L2 of the image side surface of the second lens group G3 to the radius of curvature R3L1 of the object side surface of the third lens group G4, i.e. the value of R2L2 / R3L1, is 0.61.

[0299] 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. the value of (L2+L3) / CT1W, is 1.52.

[0300] The ratio of the focal length |f4| of the moving lens group G2 to the second lens focal length, i.e. the value of |f4| / EFLT, is 0.32.

[0301] The ratio of the focal length |f3| of the third lens group G4 to the second lens focal length, i.e. the value of |f3| / EFLW, is 0.23.

[0302] Please refer to FIG. 9a to FIG. 9c, FIG. 9a is an axial chromatic aberration curve of the camera module 30 shown in FIG. 8 at the short focus end in some embodiments, FIG. 9b is a field curvature graph of the camera module 30 shown in FIG. 8 at the short focus end in some embodiments, and FIG. 9c is a distortion graph of the camera module 30 shown in FIG. 8 at the short focus end in some embodiments.

[0303] In the axial chromatic aberration curve, the spherical aberration curves corresponding to different wave bands (including 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 435 nm) of the system are included; the physical meaning is that the light of the corresponding wavelength emitted at 0-degree field of view deviates from the ideal image point after passing through the optical system; the abscissa is the deviation value in the optical axis direction, and the ordinate is the normalized coordinate at the pupil. The values in FIG. 9a are small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the optical lens 1 is well corrected. The field curvature graph is used to show the deviation of the convergence point (image height) of the light beam at different fields of view from the ideal imaging surface, X is the sagittal direction light beam, Y is the meridional direction light beam, the abscissa is the deviation value in the optical axis direction, and the ordinate is the image height. When the field of view value is too large, the image quality of the field of view is poor or there is high-order aberration. The field curvature of both directions shown in FIG. 9b is small, and the system has good focal depth. The distortion graph is used to represent the relative deviation of the convergence point (actual image height) of the light beam at different fields of view from the ideal image height. The values shown in FIG. 9c are all within 2.5%, which can ensure that the picture does not have obvious deformation.

[0304] Please refer to FIG. 10a to FIG. 10c, FIG. 10a is an axial chromatic aberration curve of the camera module 30 shown in FIG. 8 at the long focus end in some embodiments, FIG. 10b is a field curvature graph of the camera module 30 shown in FIG. 8 at the long focus end in some embodiments, and FIG. 10c is a distortion graph of the camera module 30 shown in FIG. 8 at the long focus end in some embodiments.

[0305] The axial chromatic aberration curve includes the spherical aberration curves corresponding to different wave bands of the system (including 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, 435 nm); the physical meaning is that the light of the corresponding wavelength emitted at 0 degree field deviates from the ideal image point after passing through the optical system; the abscissa is the deviation value along the optical axis direction, and the ordinate is the normalized coordinate at the pupil. The values in FIG. 10a are small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the optical lens 1 is well corrected. The astigmatic field curve is used to show the deviation of the convergence point (image height) of the light beam at different fields from the ideal imaging surface, X is the sagittal direction light beam, Y is the meridional direction light beam, the abscissa is the deviation value along the optical axis direction, and the ordinate is the image height. When the value of a certain field is too large, the image quality of the field is poor or there is high-order aberration. The two direction field curves shown in FIG. 10b are small, and the system has good focal depth. The distortion diagram is used to represent the relative deviation of the convergence point (actual image height) of the light beam at different fields from the ideal image height. The values shown in FIG. 10c are all within 1%, which can ensure that the picture does not have obvious deformation.

[0306] The camera module 30 provided by the embodiment has a zoom ratio of 1.655 for the optical lens 1, a total optical length TTL of 27.3 mm for the optical lens 1, a value of f1w / f1t of 0.97, a value of (R1W1+R1T1) / (CT) of 6.15, a value of CT of 4.8 mm, and the optical lens 1 has a small total optical length TTL at a large zoom ratio and has good imaging quality.

[0307] Embodiment Two

[0308] For reference, Table 2a, Table 2b, Table 2c and Table 2d are provided, wherein Table 2a shows the values of the radius of curvature (R), thickness, effective focal length, refractive index (587.56 nm wavelength) and Abbe number of each lens and reflective element of the camera module 30 shown in FIG. 11 at the short focal end and the long focal end in another possible embodiment. 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 end and the long focal end, which are represented by A to H. The values of A to H at the short focal end and the long focal end are shown in Table 2b.

[0309] Table 2c and Table 2d show the conic constant K and aspheric constant of each lens of the camera module 30 shown in FIG. 11 in a possible embodiment. Since the surface type of the first lens L1 is variable, the conic constant K and aspheric constant at the short focal end and the long focal end are shown respectively. At the short focal end, the surface number 1 of the first lens L1 is represented by surface number 1a, and the surface number 2 is represented by surface number 2a. At the long focal end, the surface number 1 of the first lens L1 is represented by surface number 1b, and the surface number 2 is represented by surface number 2b.

[0310] Table 2a

[0311] Table 2b

[0312] Table 2c

[0313] Table 2d

[0314] The aspheric surfaces in the optical lens 1 in Table 2a, Table 2b, Table 2c and Table 2d can be defined by, but not limited to, the following aspheric curve equation:

[0315] wherein z is the relative distance of a point on the aspheric surface with a vertical distance r from the optical axis to the tangent plane at the intersection point on the optical axis of the aspheric surface; r is the vertical distance of a point on the aspheric curve to the optical axis; c is the curvature; k is the conic coefficient; ai is the i-th order aspheric coefficient, which can be referred to Table 2b and Table 2c. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9, the tenth lens L10 and the eleventh lens L11 are all aspheric lenses.

[0316] Table 2e is the basic parameters of the camera module 30 shown in Figure 11 in a possible embodiment. In Table 2e, IMH 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 wide-angle 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 wide-angle end, HFOV T is the half field of view of the optical lens 1 at the telephoto end, HFOV W is the half field of view of the optical lens 1 at the wide-angle end, TTL is the total optical length of the optical lens 1, TTH is the total optical height of the optical lens 1, f1w is the focal length of the first lens group G1 at the wide-angle end, f1t is the focal length of the first lens group G1 at the telephoto 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 effective values.

[0317] Table 2e

[0318] Figure 11 is a structural schematic diagram of the camera module 30 shown in Figure 4 in another specific embodiment.

[0319] In this embodiment, the optical lens 1 includes a first lens group G1, a first folding element 4, a second lens group G3, a third lens group G4, and a mobile lens group G2.

[0320] The first lens group G1, the first folding element 4, the second lens group G3, the third lens group G4, and the mobile lens group G2 can be arranged in order from the object side to the image side. The second lens group G3, the third lens group G4, and the mobile lens group G2 can be arranged along the optical axis direction of the second lens group G3, that is, the optical axes of the second lens group G3, the third lens group G4, and the mobile lens group G2 can coincide; the optical axis direction of the first lens group G1 can be perpendicular to the optical axis direction of the second lens group G3.

[0321] The first lens group G1 can include a piece of face-type variable lens, that is, the first lens L1.

[0322] The second lens group G3 can include three lenses in order, that is, the second lens L2, the third lens L3, and the fourth lens L4. The second lens L2, the third lens L3, and the fourth lens L4 are arranged in order from the object side to the image side, and the three lenses can be relatively fixed. In the zooming process, the position of the second lens group G3 in the optical lens 1 can be fixed.

[0323] The third lens group G4 can include four lenses in order, that is, the fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8. The fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8 are arranged in order from the object side to the image side, and the four lenses can be relatively fixed. The third lens group G4 can move along the optical axis.

[0324] The mobile lens group G2 can include three lenses in order, that is, the ninth lens L9, the tenth lens L10, and the eleventh lens L11. The ninth lens L9, the tenth lens L10, and the eleventh lens L11 are arranged in order from the object side to the image side, and the three lenses can be relatively fixed. The mobile lens group G2 can move along the optical axis.

[0325] The first turning element 4 can be a prism. For example, the first turning element 4 can include an entrance surface 41, a reflection surface 42, and an exit surface 43. The entrance surface 41 can be perpendicular to the optical axis direction of the first lens group G1 and faces the first lens group G1. The exit surface 43 can be perpendicular to the second lens group G3 and faces the second lens group G3. The reflection surface 42 receives the light beam from the entrance surface 41 and reflects the light beam out of the exit surface 43, thereby changing the propagation direction of the light beam from the optical axis direction of the first lens group G1 to the optical axis direction of the second lens group G3. At this time, the optical axis direction of the first lens group G1 is the first direction, and the optical axis direction of the second lens group G3 is the second direction.

[0326] For example, the optical lens 1 can further include a second turning element 5. The second turning element 5 is located on the image side of the moving lens group G2. The second turning element 5 can have an entrance surface 51, a reflection surface 52, and an exit surface 53. The entrance surface 51 of the second turning element 5 can be arranged to face the moving lens group G2. The exit surface 53 of the second turning element 5 can be located on the same side of the optical axis of the moving lens group G2 as the first lens group G1. It can be understood that in the camera module 30, the optical filter 3 and the photosensitive element 2 can face the exit surface 53 of the second turning element 5 and be arranged parallel to the exit surface 53.

[0327] 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 face type of the first lens L1 changes, the first lens L1 changes from the first focal length to the second focal length, the moving lens group G2 moves towards the third lens group G4, the third lens group G4 moves towards the second lens group G3, that is, the third lens group G4 and the moving lens group G2 both move along the optical axis towards the object side, and the optical lens 1 changes from the first lens focal length to the second lens focal length.

[0328] In this embodiment, by changing the face type of the face type variable lens, the curvature of the first lens group G1 is changed, and the moving lens group G2 is moved, so as to change the focal length of the optical lens 1, and lossless zoom is realized. When the optical lens 1 captures external scenes through the short focal length end, it has a shorter focal length and a larger field of view, which is convenient for capturing scenes at a closer distance and a wider range, and the foreground is more prominent. When the optical lens 1 captures external scenes through the long focal length end, it has a longer focal length and a smaller field of view, which is convenient for capturing details of distant scenes and objects that are not easy to approach. The optical lens 1 has different focal lengths, so that the optical lens 1 can use different focal lengths for shooting in different shooting scenes, realize optical zoom of different focal lengths, that is, realize lossless optical zoom, which is conducive to obtaining higher quality images, the scene adaptability of the optical lens 1 is better, and the shooting experience of the user is greatly improved; and multiple camera modules 30 do not need to be arranged in the electronic device to realize shooting of different focal lengths, thereby reducing the volume of the camera module 30.

[0329] The first lens group G1 has a face type variable lens, which makes the focal length of the first lens group G1 variable. The change of the focal length of the first lens group G1 has a greater impact on the focal length of the optical lens 1, that is, a smaller change of the focal length of the first lens group G1 has a greater impact on the focal length of the optical lens 1, so as to easily make the optical lens 1 have a larger zoom range. Moreover, through the variable focal length of the first lens group G1, and the cooperation of the third lens group G4 and the moving lens group G2, the optical lens 1 can be continuously zoomed without damage between the first lens focal length and the second lens focal length, so that the optical lens 1 has a strong zooming capability and has a high imaging quality at different focal lengths. By arranging the first folding element 4, the propagation direction of the light beam is changed, which is beneficial to reduce the size in the second direction, and further beneficial to reduce the length of the optical lens 1, and beneficial to the miniaturization design of the optical lens 1.

[0330] Through the cooperation of the focal power and focal length of the first lens group G1, the first folding 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 zooming capability to perform a large range of optical zooming, and has a good image quality, and has a small length and volume.

[0331] The ratio of the field of view FOVW of the short focal end of the optical lens 1 to the field of view FOVT of the long focal end, that is, the value of FOVW / FOVT is 1.59.

[0332] The value of the zoom ratio EFLT / EFLW is 1.655.

[0333] The ratio of the first focal length f1w of the first lens group G1 to the second focal length f1t, that is, the value of f1w / f1t is 0.97. That is, in the process of changing from the short focal end to the long focal end, the focal length of the first lens group G1 becomes larger.

[0334] The ratio of the total length TTL of the optical lens 1 to the sum of the first lens focal length EFLW and the second lens focal length EFLT, that is, the value of TTL / (EFLT+EFLW) is 0.65.

[0335] The ratio of the second lens focal length EFLT to the half image height IMH, that is, the value of EFLT / IMH is 3.07.

[0336] Referring to Table 2b, during the change of the 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 changes from 23.22 mm to 11.32 mm, and the value decreases. The radius of curvature (B) of the image side surface of the first lens L1 changes from -95.30 mm to 25.74 mm, and the reciprocal of the value increases. 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 of the object side surface of the first lens L1 at the long focal length end to the distance CT of the movement of the moving lens group G2 from the short focal length end to the long focal length end, i.e., the value of (R1W1+R1T1) / (CT), is 6.49. The value of CT is 5.32 mm.

[0337] The ratio of the radius of curvature R2L2 of the image side surface of the second lens group G3 to the radius of curvature R3L1 of the object side surface of the third lens group G4, i.e., the value of R2L2 / R3L1, is 0.57.

[0338] The ratio of the sum of the length L2 of the second lens group G3 along the optical axis direction and the length L3 of the third lens group G4 along the optical axis direction to the interval CT1W of the second lens group G3 and the third lens group G4 along the optical axis direction at the short focal length end, i.e., the value of (L2+L3) / CT1W, is 1.39.

[0339] The ratio of the focal length |f4| of the moving lens group G2 to the second lens focal length, i.e., the value of |f4| / EFLT, is 0.31.

[0340] The ratio of the focal length |f3| of the third lens group G4 to the second lens focal length, i.e., the value of |f3| / EFLW, is 0.24.

[0341] Referring to FIGS. 12a to 12c, FIG. 12a is an axial chromatic aberration curve of the camera module 30 shown in FIG. 11 at the short focal length end in some embodiments, FIG. 12b is a field curvature curve of the camera module 30 shown in FIG. 11 at the short focal length end in some embodiments, and FIG. 12c is a distortion diagram of the camera module 30 shown in FIG. 11 at the short focal length end in some embodiments.

[0342] The axial chromatic aberration curve includes the spherical aberration curves corresponding to different wave bands of the system (the curves shown include 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm); the physical meaning is that, for the light of the corresponding wavelength emitted at 0-degree field of view, the deviation from the ideal image point after passing through the optical system; the abscissa is the deviation value in the direction of the optical axis, and the ordinate is the normalized coordinate at the pupil. As shown in FIG. 12a, the values are small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the optical lens 1 is well corrected. The astigmatic field curve is used to show the deviation of the convergence points (image height) of the light beams in different fields of view from the ideal imaging surface; X is the sagittal direction light beam, Y is the meridional direction light beam, the abscissa is the deviation value in the direction of the optical axis, and the ordinate is the image height. When the value of a certain field of view is too large, the image quality of the field of view is poor or there is high-order aberration. As shown in FIG. 12b, the astigmatic field curves in two directions are small, and the system has good focal depth. The distortion diagram is used to represent the relative deviation of the convergence points (actual image height) of the light beams in different fields of view from the ideal image height. As shown in FIG. 12c, the values are all within 2.5%, which can ensure that there is no obvious deformation of the picture.

[0343] Please refer to FIGS. 13a-13c. FIG. 13a is an axial chromatic aberration curve of the camera module 30 shown in FIG. 11 at the long-focus end in some embodiments. FIG. 13b is an astigmatic field curve of the camera module 30 shown in FIG. 11 at the long-focus end in some embodiments. FIG. 13c is a distortion diagram of the camera module 30 shown in FIG. 11 at the long-focus end in some embodiments.

[0344] The axial chromatic aberration curve includes the spherical aberration curves corresponding to different wave bands of the system (the curves shown include 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm); the physical meaning is that, for the light of the corresponding wavelength emitted at 0-degree field of view, the deviation from the ideal image point after passing through the optical system; the abscissa is the deviation value in the direction of the optical axis, and the ordinate is the normalized coordinate at the pupil. As shown in FIG. 13a, the values are small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the optical lens 1 is well corrected. The astigmatic field curve is used to show the deviation of the convergence points (image height) of the light beams in different fields of view from the ideal imaging surface; X is the sagittal direction light beam, Y is the meridional direction light beam, the abscissa is the deviation value in the direction of the optical axis, and the ordinate is the image height. When the value of a certain field of view is too large, the image quality of the field of view is poor or there is high-order aberration. As shown in FIG. 13b, the astigmatic field curves in two directions are small, and the system has good focal depth. The distortion diagram is used to represent the relative deviation of the convergence points (actual image height) of the light beams in different fields of view from the ideal image height. As shown in FIG. 13c, the values are all within 0.5%, which can ensure that there is no obvious deformation of the picture.

[0345] The camera module 30 provided by the embodiment has an optical total length TTL of 29.6 mm, an f1w / f1t value of 0.97, an (R1W1+R1T1) / (CT) value of 6.49, and a CT value of 5.32 mm. The optical total length TTL of the optical lens 1 is small at a large zoom ratio, and the optical lens 1 has good imaging quality.

[0346] Embodiment Three

[0347] For reference, Table 3a, Table 3b, Table 3c, and Table 3d are provided, wherein Table 3a shows the values of the radius of curvature (R), the thickness, the effective focal length, the refractive index (at a wavelength of 587.56 nm), and the Abbe number of each lens and reflective element of the camera module 30 shown in FIG. 14 at the short focal end and the long focal end in another possible embodiment. The thickness includes the thickness of the structure itself and the spacing between structures. Some parameters of the camera module 30 have different values at the short focal end and the long focal end, which are represented by A to I. The values of A to I at the short focal end and the long focal end are shown in Table 3b.

[0348] Table 3c and Table 3d show the conic constant K and the aspheric constant of each lens in the camera module 30 shown in FIG. 14 in a possible embodiment. Since the face type of the first lens L1 is variable, the conic constant K and the aspheric constant at the short focal end and the long focal end are shown separately. At the short focal end, the face number 1 of the first lens L1 is represented by face number 1a, and the face number 2 is represented by face number 2a. At the long focal end, the face number 1 of the first lens L1 is represented by face number 1b, and the face number 2 is represented by face number 2b.

[0349] Table 3a

[0350] Table 3b

[0351] Table 3c

[0352] Table 3d

[0353] The aspheric surface in the optical lens 1 in Table 3a, Table 3b, Table 3c, and Table 3d can be defined by, but is not limited to, the following aspheric surface equation:

[0354] Wherein, z is the relative distance of a point on the aspherical surface with a distance r from the optical axis to the tangent plane of the intersection point on the optical axis of the aspherical surface; r is the vertical distance of a point on the aspherical curve to the optical axis; c is the curvature; k is the conic coefficient; ai is the i-th order aspherical coefficient, which can be referred to Table 3b and Table 3c. Wherein, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9, the tenth lens L10 and the eleventh lens L11 are all aspherical lenses.

[0355] Please refer to Table 3e, which is the basic parameters of the camera module 30 in a possible embodiment of FIG. 14. Wherein, IMH 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 wide-angle 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 wide-angle end, HFOV T is the half field of view of the optical lens 1 at the telephoto end, HFOV W is the half field of view of the optical lens 1 at the wide-angle end, TTL is the total optical length of the optical lens 1, TTH is the total optical height of the optical lens 1, f1w is the focal length of the first lens group G1 at the wide-angle end, f1t is the focal length of the first lens group G1 at the telephoto end, f2 is the focal length of the second lens group G3, f3 is the focal length of the third lens group G4, f4 is the focal length of the moving lens group G2. Wherein, the values of f1w, f1t, f2, f3, f4, FNOT, FNOW are all effective values.

[0356] Table 3e

[0357] Please refer to FIG. 14, which is the structural schematic diagram of the camera module 30 in some specific embodiments of FIG. 4.

[0358] In this embodiment, the optical lens 1 includes the first lens group G1, the first folding element 4, the second lens group G3, the third lens group G4 and the moving lens group G2.

[0359] Wherein, the first lens group G1, the first folding element 4, the second lens group G3, the third lens group G4 and the moving lens group G2 can be arranged in order along the object side to the image side. The second lens group G3, the third lens group G4 and the moving lens group G2 can be arranged along the optical axis direction of the second lens group G3, that is, the optical axes of the second lens group G3, the third lens group G4 and the moving lens group G2 can coincide; the optical axis direction of the first lens group G1 can be perpendicular to the optical axis direction of the second lens group G3.

[0360] The first lens group G1 can include one piece of face type variable lens, i.e., the first lens L1.

[0361] The second lens group G3 can include three lenses, i.e., the second lens L2, the third lens L3 and the 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 lenses can be relatively fixed. The second lens group G3 can move along the optical axis.

[0362] The third lens group G4 can include four lenses, i.e., the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8. The fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 are arranged along the direction from the object side to the image side, and the four lenses can be relatively fixed. The third lens group G4 can move along the optical axis.

[0363] The moving lens group G2 can include three lenses, i.e., the ninth lens L9, the tenth lens L10 and the eleventh lens L11. The ninth lens L9, the tenth lens L10 and the eleventh lens L11 are arranged along the direction from the object side to the image side, and the three lenses can be relatively fixed. The moving lens group G2 can move along the optical axis.

[0364] The first turning element 4 can be a prism. For example, the first turning element 4 can include an entrance surface 41, a reflection surface 42 and an exit surface 43. The entrance surface 41 can be perpendicular to the optical axis direction of the first lens group G1 and faces the first lens group G1. The exit surface 43 can be perpendicular to the second lens group G3 and faces the second lens group G3. The reflection surface 42 receives the light beam from the entrance surface 41 and reflects the light beam to the exit surface 43, so as to change the propagation direction of the light beam from the optical axis direction of the first lens group G1 to the optical axis direction of the second lens group G3. At this time, the optical axis direction of the first lens group G1 is the first direction, and the optical axis direction of the second lens group G3 is the second direction.

[0365] For example, the optical lens 1 can further include a second turning element 5. The second turning element 5 is located on the image side of the moving lens group G2. The second turning element 5 can have an entrance surface 51, a reflection surface 52 and an exit surface 53. The entrance surface 51 of the second turning element 5 can face the moving lens group G2. The exit surface 53 of the second turning element 5 can be located on the same side of the optical axis of the moving lens group G2 as the first lens group G1. It can be understood that in the camera module 30, the optical filter 3 and the photosensitive element 2 can face the exit surface 53 of the second turning element 5 and be arranged parallel to the exit surface 53.

[0366] In the embodiment, in the process of changing the optical lens 1 from the short focal end to the long focal end, the surface type of the first lens L1 is changed, the first lens L1 is changed from the first focal length to the second focal length, the second lens group G3 moves towards the first turning element 4, the third lens group G4 moves towards the second lens group G3, and the moving lens group G2 moves towards 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 towards the object side along the optical axis; the optical lens 1 is changed from the first lens focal length to the second lens focal length.

[0367] In the embodiment, by changing the surface type of the surface type variable lens, the curvature of the first lens group G1 is changed, and the moving lens group G2 is moved to change the focal length of the optical lens 1, so as to realize lossless zooming. When the optical lens 1 shoots external scenes through the short focal end, it has a shorter focal length and a larger field of view, which is convenient for shooting scenes at a closer distance and a wider range, and the foreground is more prominent. When the optical lens 1 shoots external scenes through the long focal end, it has a longer focal length and a smaller field of view, which is convenient for shooting details of distant scenes and objects that are not easy to approach. The optical lens 1 has different focal lengths, so that the optical lens 1 can use different focal lengths for shooting in different shooting scenes, realize optical zooming of different focal lengths, that is, realize lossless optical zooming, which is beneficial to obtain higher quality images, the scene adaptability of the optical lens 1 is better, and the shooting experience of the user is greatly improved; and multiple camera modules 30 do not need to be arranged in the electronic device to realize shooting of different focal lengths, thereby reducing the volume of the camera module 30.

[0368] The first lens group G1 has a surface type variable lens, so that the focal length of the first lens group G1 is variable. The change of the focal length of the first lens group G1 has a greater impact on the focal length of the optical lens 1, that is, a smaller change of the focal length of the first lens group G1 has a greater impact on the focal length of the optical lens 1, so that the optical lens 1 is easy to have a larger zoom range. Moreover, through the variable focal length of the first lens group G1 and the cooperation of the second lens group G3, the third lens group G4 and the moving lens group G2, the optical lens 1 can continuously zoom losslessly between the first lens focal length and the second lens focal length, so that the optical lens 1 has a strong zooming capability and has a high imaging quality at different focal lengths. By arranging the first turning element 4, the propagation direction of the light beam is changed, which is beneficial to reduce the size in the second direction, and further beneficial to reduce the length of the optical lens 1, and beneficial to the miniaturization design of the optical lens 1.

[0369] 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.

[0370] 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.

[0371] The zoom ratio EFLT / EFLW is 1.655.

[0372] 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.

[0373] 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.

[0374] The ratio of the second lens focal length EFLT to the half-image height IMH, i.e., EFLT / IMH, is 3.07.

[0375] 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.

[0376] 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.

[0377] 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.

[0378] 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.

[0379] The ratio of the focal length of the third lens group G4 |f3| to the second lens focal length, i.e., |f3| / EFLW, is 0.22.

[0380] The ratio of the focal length of the third lens group G4 |f3| to the second lens focal length, i.e., |f3| / EFLW, is 0.22.

[0381] Please refer to FIGS. 15a-15c. FIG. 15a is an axial chromatic aberration curve of the camera module 30 shown in FIG. 14 at the short-focus end in some embodiments, FIG. 15b is a field curvature graph of the camera module 30 shown in FIG. 14 at the short-focus end in some embodiments, and FIG. 15c is a distortion graph of the camera module 30 shown in FIG. 14 at the short-focus end in some embodiments.

[0382] The axial chromatic aberration curve includes a spherical aberration curve corresponding to different wave bands of the system (the graph includes 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 435 nm); the physical meaning is that the light of the corresponding wavelength emitted at 0-degree field of view deviates from the ideal image point after passing through the optical system; the abscissa is the deviation value in the optical axis direction, and the ordinate is the normalized coordinate at the pupil. The values in FIG. 15a are small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the optical lens 1 is well corrected. The field curvature graph is used to show the deviation of the convergence point (image height) of the light beam at different fields of view from the ideal imaging surface. X is the sagittal direction light beam, Y is the meridional direction light beam, the abscissa is the deviation value in the optical axis direction, and the ordinate is the image height. When a certain field of view value is too large, the image quality of the field of view is poor or there is high-order aberration. The field curvature values in both directions shown in FIG. 15b are small, and the system has good focal depth. The distortion graph is used to represent the relative deviation of the convergence point (actual image height) of the light beam at different fields of view from the ideal image height. The values shown in FIG. 15c are within 2%, which can ensure that the picture does not have obvious deformation.

[0383] Please refer to FIGS. 16a-16c. FIG. 16a is an axial chromatic aberration curve of the camera module 30 shown in FIG. 14 at the long-focus end in some embodiments, FIG. 16b is a field curvature graph of the camera module 30 shown in FIG. 14 at the long-focus end in some embodiments, and FIG. 16c is a distortion graph of the camera module 30 shown in FIG. 14 at the long-focus end in some embodiments.

[0384] The axial chromatic aberration curve includes the spherical aberration curves corresponding to different wave bands of the system (the curves shown include 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 435 nm); the physical meaning is that the light of the corresponding wavelength emitted at 0 degree field deviates from the ideal image point after passing through the optical system; the abscissa is the deviation value in the optical axis direction, and the ordinate is the normalized coordinate at the pupil. The values in FIG. 16a are small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the optical lens 1 is well corrected. The astigmatic field curve is used to show the deviation of the convergence point (image height) of the light beam in different fields from the ideal imaging surface; X is the sagittal direction light beam, Y is the meridional direction light beam, the abscissa is the deviation value in the optical axis direction, and the ordinate is the image height. When the value of a certain field is too large, the image quality of the field is poor or there is high-order aberration. The distortion shown in FIG. 16b is small in both directions, and the system has good focal depth. The distortion map is used to represent the relative deviation of the convergence point (actual image height) of the light beam in different fields from the ideal image height. The values shown in FIG. 16c are all within 0.5%, which can ensure that the picture does not have obvious deformation.

[0385] The camera module 30 provided by the embodiment has a zoom ratio of 1.655, an optical total length TTL of the optical lens 1 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, a value of CT of 7.37 mm, the first lens group G1 does not need to have a large curvature, the burden of zooming 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.

[0386] Embodiment Four

[0387] For reference, please refer to Table 4a, Table 4b, Table 4c, and Table 4d. Table 4a is the values of the curvature radius (R), thickness, effective focal length, refractive index (587.56 nm wavelength), and Abbe number of each lens and reflective element of the camera module 30 shown in FIG. 17 in another possible embodiment at the short focal end and the long focal end. 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 end and the long focal end, which are represented by A to H. The values of A to H at the short focal end and the long focal end are shown in Table 4b.

[0388] Table 4c, Table 4d are the conic constant K and aspheric constant of each lens in a possible embodiment of the camera module 30 shown in FIG. 17. In which, since the surface type of the first lens LI is variable, the conic constant K and aspheric constant at the short focal length end and the long focal length end are shown respectively. At the short focal length end, the surface number 1 of the first lens LI is denoted by surface number la, and the surface number 2 is denoted by surface number 2a. At the long focal length end, the surface number 1 of the first lens LI is denoted by surface number lb, and the surface number 2 is denoted by surface number 2b.

[0389] Table 4a

[0390] Table 4b

[0391] Table 4c

[0392] Table 4d

[0393] The aspheric surface in the optical lens 1 in Table 4a, Table 4b, Table 4c and Table 4d can be defined by, but not limited to, the following aspheric curve equation:

[0394] In which, z is the relative distance of the point on the aspheric surface with the vertical distance r from the optical axis to the intersection tangent surface on the optical axis; r is the vertical distance of the point on the aspheric curve to the optical axis; c is the curvature; k is the conic constant; ai is the i-th order aspheric constant, which can be referred to Table 4b and Table 4c. In which, the first lens LI is a spherical lens, without conic constant K and aspheric constant; the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9, the tenth lens LI 0 and the eleventh lens LI 1 are all aspheric lenses.

[0395] Please refer to Table 4e, Table 4e is the basic parameters of the camera module 30 shown in FIG. 17 in a possible embodiment. In which, IMH is the half image height, EFLT is the focal length of the optical lens 1 at the long focal length 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 long focal length end, FNOW is the aperture value of the optical lens 1 at the short focal length end, HFOV T is the half field of view of the optical lens 1 at the long focal length end, HFOV WFNOT is the half field angle of the optical lens 1 at the short focal length end, TTL is the total track length of the optical lens 1, TTH is the total track height of the 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 mobile lens group G2. The values of f1w, f1t, f2, f3, f4, FNOT and FNOW are all effective values.

[0396] Table 4e

[0397] Referring to FIG. 17, FIG. 17 is a structural schematic diagram of the camera module 30 shown in FIG. 4 in some embodiments.

[0398] In this embodiment, the optical lens 1 includes the first lens group G1, the first folding element 4, the second lens group G3, the third lens group G4, and the mobile lens group G2.

[0399] The first lens group G1, the first folding element 4, the second lens group G3, the third lens group G4, and the mobile lens group G2 can be arranged in order from the object side to the image side. The second lens group G3, the third lens group G4, and the mobile lens group G2 can be arranged along the optical axis direction of the second lens group G3, that is, the optical axes of the second lens group G3, the third lens group G4, and the mobile lens group G2 can coincide; the optical axis direction of the first lens group G1 can be perpendicular to the optical axis direction of the second lens group G3.

[0400] The focal power of the first lens group G1 can be positive. The first lens group G1 can include a piece of face-type variable lens, that is, the first lens L1.

[0401] The focal power of the second lens group G3 can be negative. The second lens group G3 can include three lenses in order, that is, the second lens L2, the third lens L3, and the fourth lens L4. The second lens L2, the third lens L3, and the fourth lens L4 are arranged in order from the object side to the image side, and the three lenses can be relatively fixed. In the zooming process, the position of the second lens group G3 in the optical lens 1 can be fixed.

[0402] The focal power of the third lens group G4 can be positive. The third lens group G4 can include four lenses in order, that is, the fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8. The fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8 are arranged in order from the object side to the image side, and the four lenses can be relatively fixed. The third lens group G4 can move along the optical axis.

[0403] The optical power of the moving lens group G2 can be negative. The moving lens group G2 includes three lenses, i.e., a ninth lens L9, a tenth lens L10, and an eleventh lens L11. The ninth lens L9, the tenth lens L10, and the eleventh lens L11 are arranged along an object side to an image side direction and can be relatively fixed. The moving lens group G2 can move along an optical axis.

[0404] The first turning element 4 can be a prism. For example, the first turning element 4 can include an entrance surface 41, a reflection surface 42, and an exit surface 43. The entrance surface can be perpendicular to the optical axis of the first lens group G1 and faces the first lens group G1. The exit surface can be perpendicular to the second lens group G3 and faces the second lens group G3. The reflection surface receives the light beam from the entrance surface and reflects the light beam to the exit surface, so as to change the propagation direction of the light beam from the optical axis direction of the first lens group G1 to the optical axis direction of the second lens group G3. At this time, the optical axis direction of the first lens group G1 is a first direction, and the optical axis direction of the second lens group G3 is a second direction.

[0405] For example, the optical lens 1 can further include a second turning element 5. The second turning element 5 is located on the image side of the moving lens group G2. The second turning element 5 can have an entrance surface, a reflection surface, and an exit surface. The entrance surface of the second turning element 5 can face the moving lens group G2. The exit surface of the second turning element 5 can be located on the same side of the optical axis of the moving lens group G2 as the first lens group G1. It can be understood that in the camera module 30, the optical filter 3 and the photosensitive element 2 can face and be parallel to the exit surface of the second turning element 5.

[0406] In the embodiment, during the process of changing the optical lens 1 from the short focal length end to the long focal length end, the surface type of the first lens L1 changes, the first lens L1 changes from the first focal length to the second focal length, the moving lens group G2 moves towards the third lens group G4, the third lens group G4 moves towards the second lens group G3, i.e., the third lens group G4 and the moving lens group G2 both move along the optical axis towards the object side, and the optical lens 1 changes from the first lens focal length to the second lens focal length.

[0407] In the embodiment, the focal length of the optical lens 1 is changed by changing the surface type of the surface type variable lens, further changing the curvature of the first lens group G1, and moving the moving lens group G2, so as to realize lossless zooming. When the optical lens 1 shoots the external scene through the short-focus end, it has a shorter focal length and a larger field of view, which is convenient for shooting the scene at a closer distance and a wider range, and the foreground is more prominent. When the optical lens 1 shoots the external scene through the long-focus end, it has a longer focal length and a smaller field of view, which is convenient for shooting the details of the distant scene and objects that are not easy to approach. The optical lens 1 has different focal lengths, which can enable the optical lens 1 to use different focal lengths for shooting in different shooting scenes, realize optical zooming of different focal lengths, that is, realize lossless optical zooming, which is beneficial to obtain higher quality images, the scene adaptability of the optical lens 1 is better, and the shooting experience of the user is greatly improved; and multiple camera modules 30 do not need to be arranged in the electronic device to realize shooting of different focal lengths, thereby reducing the volume of the camera module 30.

[0408] The first lens group G1 has a surface type variable lens, so that the focal length of the first lens group G1 is variable. The change of the focal length of the first lens group G1 has a greater impact on the focal length of the optical lens 1, that is, a smaller change of the focal length of the first lens group G1 has a greater impact on the focal length of the optical lens 1, so as to easily enable the optical lens 1 to have a larger zooming range. Moreover, through the variable focal length of the first lens group G1, and the cooperation of the third lens group G4 and the moving lens group G2, the optical lens 1 can be continuously zoomed between the first lens focal length and the second lens focal length without loss, so that the optical lens 1 has a strong zooming capability and has a high imaging quality at different focal lengths. By arranging the first folding element 4, the propagation direction of the light beam is changed, which is beneficial to reduce the size in the second direction, and further beneficial to reduce the length of the optical lens 1, and beneficial to the miniaturization design of the optical lens 1.

[0409] Through the cooperation of the focal power and focal length of the first lens group G1, the first folding 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 zooming capability to perform a large range of optical zooming; and has a good image quality; in addition, the optical lens 1 has a small length and volume.

[0410] The ratio of the field of view FOVW of the short-focus end of the optical lens 1 to the field of view FOVT of the long-focus end, that is, the value of FOVW / FOVT is 1.67.

[0411] The value of the zoom ratio EFLT / EFLW is 1.655.

[0412] The ratio of the first focal length f1w of the first lens group G1 to the second focal length f1t, i.e., the value of f1w / f1t, is 0.95. That is, the focal length of the first lens group G1 increases during the change from the short focal length end to the long focal length end.

[0413] 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, i.e., the value of TTL / (EFLT+EFLW), is 0.62.

[0414] The ratio of the second lens focal length EFLT to the half image height IMH, i.e., the value of EFLT / IMH, is 3.07.

[0415] Referring to Table 4b, during the change of the 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 changes from 18.86 mm to 12.08 mm, and the value decreases. The radius of curvature (B) of the image side surface of the first lens L1 changes from -188.95 mm to 34.58 mm, and the reciprocal of the value increases.

[0416] 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 of the object side surface of the first lens L1 at the long focal length end to the distance CT by which the moving lens group G2 changes from the short focal length end to the long focal length end, i.e., the value of (R1W1+R1T1) / (CT), is 5.75. The value of CT is 5.38 mm.

[0417] The ratio of the radius of curvature R2L2 of the image side surface of the second lens group G3 to the radius of curvature R3L1 of the object side surface of the third lens group G4, i.e., the value of R2L2 / R3L1, is 0.73.

[0418] 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 length end, i.e., the value of (L2+L3) / CT1W, is 1.42.

[0419] The ratio of the focal length |f4| of the moving lens group G2 to the second lens focal length, i.e., the value of |f4| / EFLT, is 0.39.

[0420] The ratio of the focal length |f3| of the third lens group G4 to the second lens focal length, i.e., the value of |f3| / EFLW, is 0.26.

[0421] Please refer to FIG. 18a to FIG. 18c, FIG. 18a is an axial chromatic aberration curve of the camera module 30 shown in FIG. 17 at the short focus end in some embodiments, FIG. 18b is a field curvature graph of the camera module 30 shown in FIG. 17 at the short focus end in some embodiments, and FIG. 18c is a distortion graph of the camera module 30 shown in FIG. 17 at the short focus end in some embodiments.

[0422] In the axial chromatic aberration curve, the spherical aberration curves corresponding to different wave bands (including 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 435 nm) of the system are included. The physical meaning is that the light of the corresponding wavelength emitted at 0-degree field of view deviates from the ideal image point after passing through the optical system. The abscissa is the deviation value in the optical axis direction, and the ordinate is the normalized coordinate at the pupil. The values in FIG. 18a are small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the optical lens 1 is well corrected. The field curvature graph is used to show the deviation of the convergence point (image height) of the light beam at different fields of view from the ideal imaging surface. X is the sagittal direction light beam, and Y is the meridional direction light beam. The abscissa is the deviation value in the optical axis direction, and the ordinate is the image height. When the field of view value is too large, the image quality of the field of view is poor or there is high-order aberration. The field curvature values in both directions shown in FIG. 18b are small, and the system has good focal depth. The distortion graph is used to represent the relative deviation of the convergence point (actual image height) of the light beam at different fields of view from the ideal image height. The values shown in FIG. 18c are within 2.5%, which can ensure that the picture does not have obvious distortion.

[0423] Please refer to FIG. 19a to FIG. 19c, FIG. 19a is an axial chromatic aberration curve of the camera module 30 shown in FIG. 17 at the long focus end in some embodiments, FIG. 19b is a field curvature graph of the camera module 30 shown in FIG. 17 at the long focus end in some embodiments, and FIG. 19c is a distortion graph of the camera module 30 shown in FIG. 17 at the long focus end in some embodiments.

[0424] The axial chromatic aberration curve includes the spherical aberration curves corresponding to different wave bands of the system (including 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, 435 nm); the physical meaning is that the light of the corresponding wavelength emitted at 0 degree field deviates from the ideal image point after passing through the optical system; the abscissa is the deviation value along the optical axis direction, and the ordinate is the normalized coordinate at the pupil. The values in FIG. 19a are small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the optical lens 1 is well corrected. The astigmatic field curve is used to show the deviation of the convergence point (image height) of the light beam at different fields from the ideal imaging surface, X is the sagittal direction light beam, Y is the meridional direction light beam, the abscissa is the deviation value along the optical axis direction, and the ordinate is the image height. When the value of a certain field is too large, the image quality of the field is poor or there is high-order aberration. The two direction field curves shown in FIG. 19b are small, and the system has good focal depth. The distortion diagram is used to represent the relative deviation of the convergence point (actual image height) of the light beam at different fields from the ideal image height. The values shown in FIG. 19c are all within 0.5%, which can ensure that the picture does not have obvious deformation.

[0425] The camera module 30 provided by the embodiment has a zoom ratio of 1.655 for the optical lens 1, a total optical length TTL of 28.1 mm for the optical lens 1, a value of f1w / f1t of 0.95, a value of (R1W1+R1T1) / (CT) of 5.75, a value of CT of 7.37 mm, and the optical lens 1 has a small total optical length TTL at a large zoom ratio and has good imaging quality.

[0426] Embodiment Five

[0427] For reference, please refer to Table 5a, Table 5b, Table 5c and Table 5d. Table 5a shows the values of the radius of curvature (R), thickness, effective focal length, refractive index (587.56 nm wavelength) and Abbe number of each lens and reflective element of the camera module 30 shown in FIG. 20 at the short focal end and the long focal end in another possible embodiment. 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 end and the long focal end, which are represented by A to H. The values of A to H at the short focal end and the long focal end are shown in Table 5b.

[0428] Table 5c and Table 5d show the conic constant K and aspheric constant of each lens of the camera module 30 shown in FIG. 20 in a possible embodiment. Since the surface type of the first lens L1 is variable, the conic constant K and aspheric constant at the short focal end and the long focal end are shown respectively. At the short focal end, the surface number 1 of the first lens L1 is represented by surface number 1a, and the surface number 2 is represented by surface number 2a. At the long focal end, the surface number 1 of the first lens L1 is represented by surface number 1b, and the surface number 2 is represented by surface number 2b.

[0429] Table 5a

[0430] Table 5b

[0431] Table 5c

[0432] Table 5d

[0433] The aspheres in the optical lens 1 in Table 5a, Table 5b, Table 5c and Table 5d can be defined by, but not limited to, the following aspheric curve equation:

[0434] wherein z is the relative distance of a point on the aspheric curve with respect to the tangent plane at the intersection of the optical axis; r is the perpendicular distance of the point on the aspheric curve to the optical axis; c is the curvature; k is the conic coefficient; ai is the i-th order aspheric coefficient, which can be referred to Table 5b and Table 5c. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9, the tenth lens L10 and the eleventh lens L11 are all aspheric lenses.

[0435] Table 5e is the basic parameters of the camera module 30 shown in Figure 20 in a possible embodiment. In Table 5e, IMH 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 wide-angle 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 wide-angle end, HFOV T is the half field of view of the optical lens 1 at the telephoto end, HFOV W is the half field of view of the optical lens 1 at the wide-angle end, TTL is the total optical length of the optical lens 1, TTH is the total optical height of the optical lens 1, f1w is the focal length of the first lens group G1 at the wide-angle end, f1t is the focal length of the first lens group G1 at the telephoto 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 effective values.

[0436] Table 5e

[0437] Figure 20 is a structural schematic diagram of the camera module 30 shown in Figure 4 in some specific embodiments.

[0438] In this embodiment, the optical lens 1 includes a first lens group G1, a first folding element 4, a second lens group G3, a third lens group G4, and a mobile lens group G2.

[0439] The first lens group G1, the first folding element 4, the second lens group G3, the third lens group G4, and the mobile lens group G2 can be arranged in order from the object side to the image side. The second lens group G3, the third lens group G4, and the mobile lens group G2 can be arranged along the optical axis direction of the second lens group G3, that is, the optical axes of the second lens group G3, the third lens group G4, and the mobile lens group G2 can coincide; the optical axis direction of the first lens group G1 can be perpendicular to the optical axis direction of the second lens group G3.

[0440] The first lens group G1 can include a piece of face-type variable lens, that is, the first lens L1.

[0441] The second lens group G3 can include three lenses in order, that is, the second lens L2, the third lens L3, and the fourth lens L4. The second lens L2, the third lens L3, and the fourth lens L4 are arranged in the direction from the object side to the image side, and the three lenses can be relatively fixed. In the zooming process, the position of the second lens group G3 in the optical lens 1 can be fixed.

[0442] The third lens group G4 can include four lenses in order, that is, the fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8. The fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8 are arranged in the direction from the object side to the image side, and the four lenses can be relatively fixed. The third lens group G4 can move along the optical axis.

[0443] The mobile lens group G2 can include three lenses in order, that is, the ninth lens L9, the tenth lens L10, and the eleventh lens L11. The ninth lens L9, the tenth lens L10, and the eleventh lens L11 are arranged in the direction from the object side to the image side, and the three lenses can be relatively fixed. The mobile lens group G2 can move along the optical axis.

[0444] The first turning element 4 can be a prism. For example, the first turning element 4 can include an entrance surface 41, a reflection surface 42, and an exit surface 43. The entrance surface 41 can be perpendicular to the optical axis direction of the first lens group G1 and faces the first lens group G1. The exit surface 43 can be perpendicular to the second lens group G3 and faces the second lens group G3. The reflection surface 42 receives the light beam from the entrance surface 41 and reflects the light beam out of the exit surface 43, thereby changing the propagation direction of the light beam from the optical axis direction of the first lens group G1 to the optical axis direction of the second lens group G3. At this time, the optical axis direction of the first lens group G1 is the first direction, and the optical axis direction of the second lens group G3 is the second direction.

[0445] For example, the optical lens 1 can further include a second turning element 5. The second turning element 5 is located on the image side of the moving lens group G2. The second turning element 5 can have an entrance surface 51, a reflection surface 52, and an exit surface 53. The entrance surface 51 of the second turning element 5 can be arranged to face the moving lens group G2. The exit surface 53 of the second turning element 5 can be located on the same side of the optical axis of the moving lens group G2 as the first lens group G1. It can be understood that in the camera module 30, the optical filter 3 and the photosensitive element 2 can face the exit surface 53 of the second turning element 5 and be arranged parallel to the exit surface 53.

[0446] 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 type of the first lens L1 changes, the first lens L1 changes from the first focal length to the second focal length, the moving lens group G2 moves towards the third lens group G4, the third lens group G4 moves towards the second lens group G3, that is, the third lens group G4 and the moving lens group G2 both move along the optical axis towards the object side, and the optical lens 1 changes from the first lens focal length to the second lens focal length.

[0447] In this embodiment, by changing the surface type of the surface type variable lens, the curvature of the first lens group G1 is changed, and the moving lens group G2 is moved to change the focal length of the optical lens 1, thereby realizing lossless zoom. When the optical lens 1 captures external scenes through the short focal length end, it has a shorter focal length and a larger field of view, which is convenient for capturing scenes at a closer distance and a wider range, and the foreground is more prominent. When the optical lens 1 captures external scenes through the long focal length end, it has a longer focal length and a smaller field of view, which is convenient for capturing details of distant scenes and objects that are not easy to approach. The optical lens 1 has different focal lengths, which enables the optical lens 1 to use different focal lengths for shooting in different shooting scenes, realizes optical zooming with different focal lengths, that is, lossless optical zooming, which is conducive to obtaining higher quality images, the scene adaptability of the optical lens 1 is better, and the shooting experience of the user is greatly improved; and multiple camera modules 30 do not need to be arranged in the electronic device to realize shooting with different focal lengths, thereby reducing the volume of the camera module 30.

[0448] The first lens group G1 has a face type variable lens, which makes the focal length of the first lens group G1 variable. The change of the focal length of the first lens group G1 has a greater impact on the focal length of the optical lens 1, that is, a smaller change of the focal length of the first lens group G1 has a greater impact on the focal length of the optical lens 1, so as to easily make the optical lens 1 have a larger zoom range. Moreover, through the variable focal length of the first lens group G1, and the cooperation of the third lens group G4 and the moving lens group G2, the optical lens 1 can be continuously zoomed between the first lens focal length and the second lens focal length without damage, so that the optical lens 1 has a strong zooming capability and has a high imaging quality at different focal lengths. By arranging the first folding element 4, the propagation direction of the light beam is changed, which is beneficial to reducing the size in the second direction, and further beneficial to reducing the length of the optical lens 1, and beneficial to the miniaturization design of the optical lens 1.

[0449] Through the cooperation of the focal power and focal length of the first lens group G1, the first folding 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 zooming capability to perform a large range of optical zooming, and has a good image quality, and has a small length and volume.

[0450] The ratio of the field of view FOVW of the short focal end of the optical lens 1 to the field of view FOVT of the long focal end, that is, the value of FOVW / FOVT is 2.08.

[0451] The value of the zoom ratio EFLT / EFLW is 2.1.

[0452] The ratio of the first focal length f1w of the first lens group G1 to the second focal length f1t, that is, the value of f1w / f1t is 1.12. That is, in the process of changing from the short focal end to the long focal end, the focal length of the first lens group G1 decreases.

[0453] 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, that is, the value of TTL / (EFLT+EFLW) is 0.66.

[0454] The ratio of the second lens focal length EFLT to the half image height IMH, that is, the value of EFLT / IMH is 2.94.

[0455] Referring to Table 5b, in the process of changing the optical lens 1 from the short focal end to the long focal end, the radius of curvature (A) of the object side of the first lens L1 changes from 27.68 mm to 13.19 mm, and the value decreases. The radius of curvature (B) of the image side of the first lens L1 changes from -58.58 mm to 56.97 mm, and the reciprocal of the value increases.

[0456] The ratio of the sum of the curvature radius R1W1 of the object side surface of the first lens L1 at the short focal length end and the curvature radius R1T1 of the object side surface of the first lens L1 at the long focal length end to the distance CT moved by the moving lens group G2 from the short focal length end to the long focal length end, i.e., the value of (R1W1+R1T1) / (CT) is 4.91. The value of CT is 8.33 mm.

[0457] The ratio of the curvature radius R2L2 of the image side surface of the second lens group G3 to the curvature radius R3L1 of the object side surface of the third lens group G4, i.e., the value of R2L2 / R3L1 is 0.56.

[0458] The ratio of the sum of the length L2 of the second lens group G3 along the optical axis direction and the length L3 of the third lens group G4 along the optical axis direction to the interval CT1W of the second lens group G3 and the third lens group G4 along the optical axis direction at the short focal length end, i.e., the value of (L2+L3) / CT1W is 1.28.

[0459] The ratio of the focal length |f4| of the moving lens group G2 to the second lens focal length, i.e., the value of |f4| / EFLT is 0.31.

[0460] The ratio of the focal length |f3| of the third lens group G4 to the second lens focal length, i.e., the value of |f3| / EFLW is 0.20.

[0461] Please refer to FIGS. 21a-21c. FIG. 21a is an axial chromatic aberration curve of the camera module 30 shown in FIG. 20 at the short focal length end in some embodiments. FIG. 21b is a field curvature curve of the camera module 30 shown in FIG. 20 at the short focal length end in some embodiments. FIG. 21c is a distortion graph of the camera module 30 shown in FIG. 20 at the short focal length end in some embodiments.

[0462] The axial chromatic aberration curve includes the spherical aberration curves corresponding to different wave bands of the system (the curves shown include 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm); the physical meaning is that, for the light of the corresponding wavelength emitted at 0-degree field of view, the deviation from the ideal image point after passing through the optical system; the abscissa is the deviation value in the direction of the optical axis, and the ordinate is the normalized coordinate at the pupil. As shown in FIG. 21a, the values are small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the optical lens 1 is well corrected. The astigmatic field curve is used to show the deviation of the convergence points (image height) of the light beams in different fields of view from the ideal imaging surface; X is the sagittal direction light beam, Y is the meridional direction light beam, the abscissa is the deviation value in the direction of the optical axis, and the ordinate is the image height. When the value of a certain field of view is too large, the image quality of the field of view is poor or there is high-order aberration. As shown in FIG. 21b, the astigmatic field curves in two directions are small, and the system has good focal depth. The distortion diagram is used to represent the relative deviation of the convergence points (actual image height) of the light beams in different fields of view from the ideal image height. As shown in FIG. 21c, the values are all within 2.5%, which can ensure that there is no obvious deformation of the picture.

[0463] Please refer to FIGS. 22a to 22c; FIG. 22a is an axial chromatic aberration curve of the camera module 30 shown in FIG. 20 at the telephoto end in some embodiments, FIG. 22b is an astigmatic field curve of the camera module 30 shown in FIG. 20 at the telephoto end in some embodiments, and FIG. 22c is a distortion diagram of the camera module 30 shown in FIG. 20 at the telephoto end in some embodiments.

[0464] The axial chromatic aberration curve includes the spherical aberration curves corresponding to different wave bands of the system (the curves shown include 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm); the physical meaning is that, for the light of the corresponding wavelength emitted at 0-degree field of view, the deviation from the ideal image point after passing through the optical system; the abscissa is the deviation value in the direction of the optical axis, and the ordinate is the normalized coordinate at the pupil. As shown in FIG. 22a, the values are small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the optical lens 1 is well corrected. The astigmatic field curve is used to show the deviation of the convergence points (image height) of the light beams in different fields of view from the ideal imaging surface; X is the sagittal direction light beam, Y is the meridional direction light beam, the abscissa is the deviation value in the direction of the optical axis, and the ordinate is the image height. When the value of a certain field of view is too large, the image quality of the field of view is poor or there is high-order aberration. As shown in FIG. 22b, the astigmatic field curves in two directions are small, and the system has good focal depth. The distortion diagram is used to represent the relative deviation of the convergence points (actual image height) of the light beams in different fields of view from the ideal image height. As shown in FIG. 22c, the values are all within 0.5%, which can ensure that there is no obvious deformation of the picture.

[0465] The camera module 30 provided by the 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, an f1w / f1t of 1.12, an (R1W1+R1T1) / (CT) of 4.91, a CT of 8.33 mm, a large zoom ratio, an optical total length TTL smaller than the second lens focal length EFLT, and good imaging quality.

[0466] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict, and any combination of features in different embodiments is within the protection scope of the present application, that is, the above-described multiple embodiments can also be combined as needed.

[0467] It should be noted that all the above-mentioned drawings are exemplary illustrations of the present application, and do not represent the actual size of the product. The size ratio relationship between the components in the drawings is not limited to the actual product of the present application.

[0468] The above is only some embodiments and implementations of the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An optical lens (1), characterized in that, The optical lens (1) comprises a first lens group (G1), a first turning element (4) and a moving lens group (G2) arranged in sequence along a direction from an object side to an image side, the first turning element (4) is used for changing a propagation direction of an optical axis from an optical axis direction of the first lens group (G1) to an optical axis direction of the moving lens group (G2), the optical axis direction of the first lens group (G1) is different from the optical axis direction of the moving lens group (G2); The first lens group (G1) comprises a face type variable lens, and during zooming, the face type variable lens changes a focal length of the first lens group (G1) by changing a face type. The moving lens group (G2) can move along an optical axis, and during zooming, the moving lens group (G2) moves along the optical axis direction of the moving 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; Wherein, FOVW is a field of view angle of the optical lens (1) at a short focus end, and FOVT is a field of view angle of the optical lens (1) at a long focus end.

3. The optical lens (1) according to claim 1 or 2, characterized in that, The optical lens (1) satisfies: 0.8 Wherein, f1w is a focal length of the first lens group (G1) at a short focus end, and f1t is a focal length of the first lens group (G1) at a long focus 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; Wherein, TTL is an optical total length of the optical lens (1), EFLW is a focal length of a short focus end of the optical lens (1), and EFLT is a focal length of a long focus end of the optical lens (1).

5. The optical lens (1) according to claim 4, characterized in that, The optical lens (1) satisfies: EFLT / IMH>2; Wherein, IMH is a half 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 first lens group (G1) has a positive refractive power.

7. The optical lens (1 ) according to any one of claims 1 to 6, characterized in that, When the optical lens (1) changes from a short focus end to a long focus end, a radius of curvature of an object side surface of the face type variable lens becomes smaller, and / or an inverse of a radius of curvature of an image side surface of the face type variable lens 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; Wherein, R1W1 is a radius of curvature of an object side surface of a face type variable lens of the first lens group (G1) at a short focus end, R1T1 is a radius of curvature of an object side surface of the face type variable lens of the first lens group (G1) at a long focus end, and CT is a distance of movement of the moving lens group (G2) from a short focus end to a long focus end.

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

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 by: 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 by The camera module (30) of claim 19 or 20, and an image processor (60) connected in communication with the camera module (30), the image processor (60) configured to acquire image data from the camera module (30) and process the image data.

Images