Camera modules and electronic devices

Abstract

The present application discloses a camera module and an electronic device. The camera module includes a first optical element, a second optical element and a photosensitive element arranged from the object side to the image side. The first optical element includes an incident surface, a first reflection surface and an exit surface arranged from the object side to the image side, the incident surface is a convex surface near the optical axis, the first reflection surface is used to change the propagation direction of the optical axis, and the exit surface is a concave surface near the optical axis. The second optical element includes at least one lens. During the anti-shake process of the camera module, the first optical element moves and the photosensitive element remains fixed. The optical anti-shake mechanism of the camera module has low cost and good imaging quality.

Description

Technical Field

[0001] The present application relates to the technical field of photographing equipment, and in particular to a camera module and an electronic device. Background Art

[0002] At present, the camera module of electronic equipment adopts a periscope telephoto lens to achieve telephoto shooting and avoid significantly increasing the size of the module. The periscope telephoto lens sets a reflector in its optical path to achieve optical path folding. The periscope telephoto lens can also set a convex lens on the object side of the reflector to achieve a large aperture.

[0003] The above-mentioned camera module usually achieves anti-shake through two solutions. The first solution is to achieve anti-shake through the movement of the photosensitive element, and the second solution is to achieve anti-shake through the movement of the reflector. In the first solution, the structure and circuit design of the driving mechanism of the photosensitive element are complex and costly, resulting in high cost of the camera module; in the second solution, the driving mechanism of the reflector is easy to implement and low cost, but achieving anti-shake through the movement of the reflector will cause the image quality of the camera module to deteriorate seriously and the image quality is poor. Therefore, how to make the camera module with anti-shake function have lower cost and higher image quality is an important research direction for various manufacturers. Summary of the invention

[0004] The present application provides a camera module and electronic equipment with low cost and high imaging quality.

[0005] In the first aspect, the embodiment of the present application provides a camera module. The camera module includes a telephoto lens and a photosensitive element, the photosensitive element is located on the image side of the telephoto lens; the telephoto lens includes a first optical element and a second optical element; the first optical element includes an incident surface, a first reflection surface and an exit surface arranged from the object side to the image side, the incident surface is a convex surface near the optical axis, the first reflection surface changes the propagation direction of the optical axis from the first direction to the second direction, the second direction intersects with the first direction, and the exit surface is a concave surface near the optical axis; the second optical element is located on the image side of the first optical element, and the second optical element includes at least one lens.

[0006] In which, during the anti-shake process of the camera module, the first optical element rotates around the first direction and / or around the third direction, the photosensitive element remains fixed, and the third direction intersects with the first direction and the second direction.

[0007] In the present application, the camera module can drive the first optical element to move through a conventional anti-shake motor, and there is no need to set an anti-shake driving mechanism on the photosensitive element, so the cost of the optical anti-shake mechanism of the camera module can be reduced. In addition, since the first optical element is provided with an incident surface with a convex structure and an exit surface with a concave structure, the incident surface and the exit surface move synchronously with the first reflective surface, so during the anti-shake process of the camera module, the incident surface can collect light, and the exit surface can compensate for aberrations, which is conducive to reducing the module size of the camera module, realizing the miniaturization of the camera module, and can improve the anti-shake effect of the camera module and the imaging quality of the camera module.

[0008] In addition, in the traditional solution of achieving anti-shake by driving the image sensor to tilt (shift), since it is necessary to set an anti-shake drive mechanism around the image sensor, the structural design and circuit design of the anti-shake drive mechanism are relatively complex and require a large installation space. Therefore, when a photosensitive element with a sensor diagonal greater than 10mm is required, the module size of the camera module is at least 32mm or more. In the implementation of the present application, for photosensitive elements of the same size, since the photosensitive element is a fixed structure, there is no need to set an anti-shake drive mechanism, and the camera module does not need to reserve an anti-shake drive mechanism installation space around the photosensitive element, so the module size of the camera module can be reduced, which is conducive to the miniaturization of the camera module. In some implementations, the module size can be reduced to less than 31mm.

[0009] In addition, when the overall volume of the camera module is limited, there is no need to reserve installation space for the anti-shake drive structure around the photosensitive element, so there is ample space for arranging the photosensitive element. The camera module can select a photosensitive element with a larger photosensitive area, which is conducive to achieving a large target surface of the camera module.

[0010] Therefore, the camera module implemented in the present application can achieve long-focus shooting with large target area, low cost, small size and high imaging quality.

[0011] In some possible implementations, the focal length F1 of the first optical element and the focal length Fsys of the telephoto lens satisfy: F1 / Fsys≥1.2. In this embodiment, by setting the ratio of the focal length of the first optical element to the focal length of the telephoto lens to be greater than or equal to 1.2, the camera module can have better image clarity when anti-shake is achieved through the movement of the first optical element, so as to obtain better imaging quality.

[0012] In some possible implementations, the focal length F1 of the first optical element and the focal length Fsys of the telephoto lens satisfy: 22.5 ≥ F1 / Fsys ≥ 1.2. In this implementation, the camera module can be more easily miniaturized while taking into account the imaging quality by further limiting the ratio F1 / Fsys of the focal length F1 of the first optical element and the focal length Fsys of the telephoto lens. Among them, the larger the value of F1 / Fsys, the larger the focal length F1 of the first optical element, and the easier it is for the camera module to obtain better image clarity when achieving anti-shake through the movement of the first optical element; the smaller the value of F1 / Fsys, the smaller the focal length F1 of the first optical element, and the easier it is for the camera module to achieve miniaturization.

[0013] In some possible implementations, the focal length F1 of the first optical element satisfies: F1≤380 mm. In this implementation, the camera module takes into account both imaging quality and module miniaturization by limiting the value of the focal length F1 of the first optical element.

[0014] In some possible implementations, the focal length Fsys of the telephoto lens satisfies: 10 mm ≤ Fsys ≤ 40 mm.

[0015] In some possible implementations, the incident surface of the first optical element may be a spherical surface to reduce the difficulty of processing. The exit surface of the first optical element may be a spherical surface to reduce the difficulty of processing. In other implementations, the incident surface and / or the exit surface may also be aspherical surfaces.

[0016] In some possible implementations, the radius of curvature L1S1R of the incident surface satisfies: 6 mm ≤ L1S1R ≤ 300 mm.

[0017] When the curvature radius L1S1R of the incident surface is larger, the incident surface is easier to process, and when the curvature radius L1S1R of the incident surface is smaller, the light collection effect of the incident surface is better. This implementation method limits the value of the curvature radius L1S1R of the incident surface to a certain range, so that the processing difficulty of the incident surface is relatively small and the light collection effect is better.

[0018] In some possible implementations, the radius of curvature L1S1R of the incident surface satisfies: 6mm≤L1S1R≤23mm. In this implementation, the incident surface is easy to process and has a good light collection effect. Among them, the radius of curvature L1S1R of the incident surface may also satisfy: 10mm≤L1S1R≤20mm.

[0019] In some possible implementations, the curvature radius L2S2R of the exit surface satisfies: 10mm≤L2S2R≤300mm. When the curvature radius L2S2R of the exit surface is larger, the exit surface is easier to process, and when the curvature radius L2S2R of the exit surface is smaller, the exit surface can better achieve aberration compensation. This implementation method limits the value of the curvature radius L2S2R of the exit surface to a certain range, so that the processing difficulty of the exit surface is relatively small and the aberration compensation effect is better.

[0020] In some possible implementations, the curvature radius L2S2R of the exit surface satisfies: 15mm≤L2S2R≤300mm. In this implementation, the exit surface is easy to process and can better compensate for aberrations. Among them, the curvature radius L2S2R of the exit surface can also satisfy: 16mm≤L2S2R≤40mm.

[0021] In some possible implementations, the radius of curvature L1S1R of the incident surface and the focal length Fsys of the telephoto lens satisfy: 0.4≤L1S1R / Fsys≤6 or 0.4≤L1S1R / Fsys≤1.4. In this implementation, the camera module limits the value of L1S1R / Fsys to better balance the light collection performance and the optical image stabilization performance.

[0022] In some possible implementations, the radius of curvature L2S2R of the exit surface and the focal length Fsys of the telephoto lens satisfy: 0.4≤L2S2R / Fsys≤10 or 0.9≤L2S2R / Fsys≤6. In this implementation, the camera module limits the value of L2S2R / Fsys to achieve better imaging quality and optical image stabilization performance.

[0023] In some possible implementations, the first optical element includes a first lens and a second lens, the first lens is located on the object side of the first reflective surface, and the object side surface of the first lens is the incident surface, and the second lens is located on the image side of the first reflective surface, and the image side surface of the second lens is the exit surface.

[0024] In some possible implementations, the first lens may have positive optical power, and the first lens may be used to shrink the light beam. Exemplarily, the first lens may be a convex lens. In this implementation, since the light beam entering the telephoto lens begins to shrink after passing through the first lens, when it reaches the second optical element after being reflected by the first reflective surface, it has already shrunk over a long optical path, and the light beam diameter is small, and the second optical element no longer becomes the maximum limit of the light aperture of the telephoto lens. Therefore, under a certain device thickness, even if the size of the second optical element is limited by the device thickness, by setting the first lens with positive optical power in the first optical element, the light aperture of the telephoto lens can be effectively increased while taking into account the module size, thereby achieving a large aperture.

[0025] In some possible implementations, the aperture value of the telephoto lens may be less than or equal to 2.4. For example, the aperture value of the telephoto lens may be 1.4, 1.56, 1.66, 2.06, 2.16, 2.24, 2.36, etc.

[0026] In some possible implementations, the focal length f1 of the first lens and the focal length Fsys of the telephoto lens satisfy: 0.5≤f1 / Fsys≤20. In this implementation, the camera module can better balance the light collection performance and the optical image stabilization performance by limiting the value of f1 / Fsys.

[0027] In some possible implementations, the second lens may have a negative optical power to better compensate for aberrations and improve the imaging quality of the camera module. In addition, the second lens can reduce the incident angle of the light beam on the second optical element, reduce the design difficulty of the second optical element, and achieve better imaging effects.

[0028] In some possible implementations, the focal length f2 of the second lens and the focal length Fsys of the telephoto lens satisfy: -20≤f2 / Fsys≤0. In this implementation, the camera module can achieve better imaging quality and optical image stabilization performance by limiting the value of f2 / Fsys.

[0029] In some possible implementations, the first optical element includes a first reflector, the first reflector includes a first reflective surface, and the first reflector is a prism. The refractive index Nd of the first reflector satisfies: Nd≤1.85. In this implementation, by limiting the value of the refractive index Nd of the first reflector, since the refractive index Nd is inversely proportional to the Abbe number, the Abbe number of the first reflector is relatively high, so that it has a higher dispersion performance, so as to ensure that no excessive residual chromatic aberration is generated, and reduce the design difficulty of the lens group located on its image side.

[0030] In some possible implementations, the first optical element includes a first reflector, the first reflector includes a first reflective surface, and the first reflector is a prism; the image side surface of the first lens is fixed to the object side surface of the first reflector, and the object side surface of the second lens is fixed to the image side surface of the second reflector. In this case, after the first optical element is assembled, the assembly structure of the first lens and / or the second lens and the first reflector is compact, which is conducive to miniaturization of the camera module.

[0031] In some possible implementations, the first lens, the first reflector, and the second lens are all made of glass, the first lens is glued to the first reflector, and the second lens is glued to the first reflector. In this implementation, the connection between the first lens and the first reflector, and the connection between the second lens and the first reflector are both glass-to-glass gluing connections, and the connection process is stable and reliable, so that the assembly yield of the first optical element is high and the optical performance of the first optical element is better. In some other implementations, the connection between the first lens and the first reflector, and the connection between the second lens and the first reflector can also be achieved by a stamping process.

[0032] Exemplarily, the first reflective surface can be a plane to have good processability. In other implementations, the first reflective surface can also correct aberrations such as astigmatism when realizing light reflection, so as to further improve image quality or reduce volume. For example, the first reflective surface can also be a spherical surface, a cylindrical surface, or a free-form surface. Among them, the spherical surface can be convex or concave. The cylindrical surface has a curvature in one direction and extends in a straight line in another direction. Exemplarily, a high-reflective film can also be provided on the first reflective surface to improve the reflection efficiency, so that the light of the light beam enters the subsequent optical element after being completely reflected or nearly completely reflected.

[0033] In some possible implementations, the second optical element includes a first lens group and a second lens group, the second lens group is located on the image side of the first lens group, and the camera module achieves focusing by moving the first lens group and / or the second lens group along the optical axis. In this implementation, the second optical element includes two lens groups, and the camera module can achieve automatic focusing by moving at least one of the lens groups, which is conducive to macro photography.

[0034] Exemplarily, the first lens group has positive focal power, and the second lens group has negative focal power. In some examples, the first lens group is a movable lens group, and the second lens group is a fixed lens group, and the camera module achieves focusing by moving the first lens group along the optical axis. At this time, the focusing stroke of the first lens group is small, which can effectively suppress the deterioration of aberrations caused by focusing, so that the camera module has a strong focusing ability, the imaging quality of the camera module is high, and it has a strong macro capability. Since the focusing stroke of the first lens group is small, it is beneficial to reduce the volume of the motor used to drive the first lens group to move, making the camera module easier to miniaturize. In addition, the second lens group can act as a flat field lens to compensate for part of the field curvature changes caused by focusing, thereby enhancing the focusing ability of the first lens group, so that the camera module has a strong focusing ability and higher imaging quality.

[0035] In other implementations, the first lens group is a fixed lens group, the second lens group is a movable lens group, and the camera module achieves focusing by moving the second lens group along the optical axis.

[0036] In other implementations, the first lens group and the second lens group are both movable lens groups, and the camera module can achieve focusing by moving the first lens group and the second lens group along the optical axis. During the focusing process, the moving directions of the first lens group and the second lens group can be the same or different, and the moving distances can be the same or different. At this time, in this implementation, the focusing speed of the camera module is fast, the focusing stroke of the lens group is small, and the camera module can achieve macro shooting.

[0037] In some possible implementations, the focal length F2 of the first lens group and the focal length Fsys of the telephoto lens satisfy: 0.2≤F2 / Fsys≤1. In this implementation, by setting F2 / Fsys≤1, the first lens group can achieve focusing by moving a small displacement, thereby reducing the focusing stroke and improving the focusing ability; by setting 0.2≤F2 / Fsys, it is beneficial to control the aberration of the light beam passing through the first lens group, making it easier for the second lens group to perform aberration correction, and the camera module has better imaging quality; therefore, by reasonably designing the ratio of the focal length F2 of the first lens group to the focal length Fsys of the telephoto lens, the camera module can take into account both the focusing ability and the imaging quality.

[0038] For example, the focal length F2 of the first lens group and the focal length Fsys of the telephoto lens may also satisfy: 0.3≤F2 / Fsys≤0.6.

[0039] In some possible implementations, the focal length F3 of the second lens group and the focal length Fsys of the telephoto lens satisfy: -1.5≤F3 / Fsys≤-0.2. For example, the focal length F3 of the second lens group and the focal length Fsys of the telephoto lens may also satisfy: -0.9≤F3 / Fsys≤-0.3.

[0040] In this implementation, by reasonably designing the ratio of the focal length F3 of the second lens group to the focal length Fsys of the telephoto lens, the camera module can balance the image quality difference between long-range shooting and close-range shooting at a relatively low assembly sensitivity, thereby obtaining a more uniform image quality. When the assembly sensitivity is low, the allowable deviation (tolerance) range of the telephoto lens during assembly is larger, making it easier to assemble.

[0041] In some possible implementations, the first optical element includes 2 to 3 lenses, the first lens group includes 3 to 5 lenses, and the second lens group includes 1 to 4 lenses.

[0042] Among them, the first lens of the first lens group closest to the object side can have positive optical power, so that the light beam passing through the first optical element can smoothly enter the first lens group, so as to improve the imaging quality of the camera module.

[0043] Among them, the last lens of the second lens group closest to the image side can have negative optical power to compensate for aberrations to improve the imaging quality of the camera module.

[0044] In some possible implementations, the camera module achieves focusing by moving the second optical element along the optical axis. In this case, the multiple lenses of the second optical element form a lens group. In this implementation, the optical path design and structural design of the camera module are relatively simple and easy to implement, and the processability of the camera module is better.

[0045] In some possible implementations, the first optical element includes 2 to 3 lenses, and the second optical element includes 3 to 6 lenses. Exemplarily, the second optical element has positive focal length. In some implementations, the first lens closest to the object side of the second optical element may have positive focal length; the last lens closest to the image side of the second optical element may have negative focal length. In this case, the optical path design of the camera module is simple and the imaging quality is high.

[0046] In some possible implementations, the total optical length TTL of the telephoto lens and the focal length Fsys of the telephoto lens satisfy: 0.8≤TTL / Fsys≤3.

[0047] In this implementation, by limiting the ratio of the total optical length TTL of the telephoto lens to the focal length Fsys of the telephoto lens, the telephoto lens takes into account both the telephoto shooting requirements and the short total length requirements. The thickness of the telephoto lens is relatively small, which is conducive to the miniaturization of the camera module.

[0048] In some possible implementations, the total optical length TTL of the telephoto lens satisfies: 15 mm ≤ TTL ≤ 50 mm. For example, the total optical length TTL of the telephoto lens may also satisfy: 15 mm ≤ TTL ≤ 30 mm.

[0049] In some possible implementations, the telephoto lens further includes a second reflective surface, the second reflective surface is located on the image side of the second optical element, and the second reflective surface changes the propagation direction of the optical axis from the second direction to a fourth direction, and the fourth direction intersects the second direction. In this case, the arrangement plane of the photosensitive elements can be perpendicular to the thickness direction of the electronic device, and the size of the target surface is not limited by the size of the electronic device in the thickness direction, which is conducive to the large target surface design of the camera module.

[0050] In some possible implementations, the field of view angle of the telephoto lens is less than or equal to 40°. In this implementation, by limiting the field of view angle of the telephoto lens, the camera module can better achieve telephoto shooting, and has better optical image stabilization performance and better imaging quality.

[0051] In some possible implementations, the half sensor diagonal ImgH of the photosensitive element satisfies: 2.5mm≤ImgH≤8.16mm or 2.5mm≤ImgH≤4.0mm or 4.2mm≤ImgH≤8.16mm.

[0052] In this implementation, since the photosensitive element has a relatively ample arrangement space and the camera module has a relatively small size restriction on the photosensitive element, the photosensitive element can flexibly select a larger target surface or a smaller target surface as needed.

[0053] In some implementations, the optical surface of at least one lens of the telephoto lens is an aspherical surface, and the aspherical optical surface has different optical powers from the paraxial to the outer field of view area, so that the image has a more balanced image quality. And / or, the optical surface of at least one lens of the telephoto lens can be a free-form surface to correct aberrations.

[0054] In some implementations, the telephoto lens further includes an aperture stop. Exemplarily, the aperture stop can be installed on the second optical element. In this case, the aperture adjustment effect of the aperture stop is better, which can improve the imaging quality of the telephoto lens. In some other implementations, the aperture stop can also be installed at other positions of the telephoto lens, and the implementation of this application is not strictly limited to this.

[0055] The aperture diaphragm may be a spacer ring structure or a variable fan blade structure; or, the aperture diaphragm may be realized by a surface spraying process, for example, by spraying a light-shielding material on a lens to form an aperture diaphragm. The position of the aperture diaphragm may be fixed or variable. For example, the position of the aperture diaphragm is variable, and the aperture diaphragm may be adjusted according to the focusing condition to be located between different lenses.

[0056] In some implementations, at least one lens of the telephoto lens may adopt special-shaped technology to reduce the size of the telephoto lens. For example, the second lens or at least one lens in the second optical element may have a cutout for reducing the height of the lens. The cutout may be implemented by an I-CUT process. By providing a cutout for reducing the height of the lens on the second lens or at least one lens in the second optical element, the size of the telephoto lens in the height direction can be effectively reduced, so that the telephoto lens can be better adapted to miniaturized electronic devices, thereby increasing the scope of application of the telephoto lens. In addition, since the height of the lens is reduced by the cutout, the lens can be provided with a larger light-transmitting aperture, thereby increasing the light transmittance of the telephoto lens, so that the imaging quality of the telephoto lens is better. Among them, special-shaped technology can also be used on the structural support members of the lens such as the lens barrel and the spacer to reduce the size of the telephoto lens.

[0057] In some implementations, the peripheral side surface or supporting surface of at least one lens of the telephoto lens can be blackened or roughened to eliminate stray light and improve image quality. The blackening treatment can be coated or plated with matte materials such as black ink, or it can be a film. The roughening treatment is mainly used to increase the roughness. Of course, in some other implementations, the telephoto lens can also eliminate stray light by other means, and the implementation of this application does not strictly limit this.

[0058] In some implementations, the materials used for different lenses of the telephoto lens may have different temperature characteristics, such as using glass and plastic respectively, to reduce the impact of ambient temperature.

[0059] In some implementations, the optical surface of at least one lens of the telephoto lens may form a diffraction structure. In this implementation, by properly setting the diffraction structure, chromatic aberration can be reduced and the volume of the telephoto lens can also be reduced.

[0060] In some implementations, the telephoto lens may further include a liquid lens. For example, the liquid lens may be located between the first optical element and the second optical element. In this implementation, the focusing effect may be enhanced by the liquid lens to achieve ultra-macro photography. The liquid lens is a structural component that uses liquid as a lens and changes the focal length by changing the curvature of the liquid.

[0061] In a second aspect, an embodiment of the present application further provides an electronic device, the electronic device comprising an image processor and any of the above-mentioned camera modules, the image processor being communicatively connected to the camera module, the image processor being used to obtain image data from the camera module and process the image data. The electronic device of the present application has good image quality and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 is a schematic diagram of the structure of an electronic device provided in some embodiments of the present application;

[0063] Figure 2 yes Figure 1 A schematic diagram of a partially exploded structure of the electronic device shown;

[0064] Figure 3 yes Figure 2 The camera module shown is a partial structural schematic diagram of some embodiments;

[0065] Figure 4 yes Figure 3 The optical path structure diagram of the camera module shown in some usage states;

[0066] Figure 5 yes Figure 3 A simulation effect diagram of the camera module shown in a possible embodiment;

[0067] Figure 6 yes Figure 2 The schematic diagram of some structures of the camera module shown in other embodiments;

[0068] Figure 7 yes Figure 6 The optical path structure diagram of the camera module shown in some usage states;

[0069] Figure 8 yes Figure 6 A simulation effect diagram of the camera module shown in a possible embodiment;

[0070] Fig. 9 yes Figure 2 The schematic diagram of some structures of the camera module shown in other embodiments;

[0071] Fig.10 yes Fig. 9 The optical path structure diagram of the camera module shown in some usage states;

[0072] Fig.11 yes Fig. 9 A simulation effect diagram of the camera module shown in a possible embodiment;

[0073] Fig.12 yes Figure 2 The schematic diagram of some structures of the camera module shown in other embodiments;

[0074] Fig.13 yes Fig.12 The optical path structure diagram of the camera module shown in some usage states;

[0075] Fig.14 yes Fig.12 A simulation effect diagram of the camera module shown in a possible embodiment;

[0076] Fig.15 yes Figure 2 The schematic diagram of some structures of the camera module shown in other embodiments;

[0077] Fig.16 yes Fig.15 The optical path structure diagram of the camera module shown in some usage states;

[0078] Fig.17 yes Fig.15 A simulation effect diagram of a camera module in a possible embodiment is shown. DETAILED DESCRIPTION

[0079] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of the present application are explained and described below.

[0080] Focal power is equal to the difference between the convergence of the image-side beam and the convergence of the object-side beam. It characterizes the ability of an optical system to deflect light.

[0081] A lens or lens group with positive optical power has a positive focal length and has the effect of converging light.

[0082] A lens or lens group with negative optical power has a negative focal length and has the effect of diverging light.

[0083] Focal length, also known as focal length, is a measure of the convergence or divergence of light in an optical system. It refers to the vertical distance from the optical center of a lens or lens group to the focal plane when an infinitely distant scene forms a clear image on the focal plane through a lens or lens group. From a practical point of view, it can be understood as the distance from the center of the lens to the plane when the object is infinitely far away. For a fixed-focus lens, the position of its optical center is fixed; for a telephoto lens, the change of the optical center of the lens brings about a change in the focal length of the lens.

[0084] The object side is bounded by the lens. The side where the object is located is called the object side, and the surface of the lens close to the object side is called the object side.

[0085] The image side is bounded by the lens. The side where the image of the object is located is called the image side, and the surface of the lens close to the image side is called the image side.

[0086] The aperture diaphragm is a device used to control the amount of light that passes through the lens and enters the photosensitive surface inside the camera body. It is usually inside the lens.

[0087] Aperture value, also known as F number (Fno), is the relative value obtained by dividing the focal length of the lens by the diameter of the lens entrance pupil (the inverse of the relative aperture). The smaller the aperture value, the more light enters in the same unit time. The larger the aperture value, the smaller the depth of field, and the background content of the photo will be blurred, similar to the effect of a telephoto lens.

[0088] Total track length (TTL) refers to the total length from the surface of the lens closest to the object side to the imaging surface. TTL is the main factor affecting the height of the camera.

[0089] The imaging plane is located on the image side of all lenses in the telephoto lens, and is the plane on which the image is formed after light passes through each lens in the telephoto lens in sequence.

[0090] The optical axis is an axis that passes vertically through the center of the lens. The optical axis of the lens is the axis that passes through the center of each lens of the lens. When light parallel to the optical axis enters a convex lens, the ideal convex lens should have all the light converge at one point behind the lens. This point where all the light converges is the focus.

[0091] Focus is the point where parallel light rays converge after being refracted by a lens or lens group.

[0092] The image focal plane, also called the back focal plane or the second focal plane, is a plane passing through the image focus (also called the back focus or the second focus) and perpendicular to the optical axis of the system.

[0093] The Abbe number, or dispersion coefficient, is the difference ratio of the refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material.

[0094] In optical instruments, the angle of view (FOV) is the angle formed by the two edges of the maximum range of the image of the object to be measured that can pass through the lens, with the lens of the optical instrument as the vertex. The size of the field of view angle determines the field of view of the optical instrument. The larger the field of view angle, the larger the field of view and the smaller the optical magnification.

[0095] The half-sensor diagonal ImgH (Image Hight) represents half of the diagonal length of the effective pixel area on the photosensitive chip, that is, the image height of the imaging surface.

[0096] Aberration, the paraxial region of the optical system has the properties of an ideal optical system. The paraxial light emitted from a point on the object intersects the image plane at one point (also known as the paraxial image point). However, the light that actually passes through different apertures of the lens is difficult to intersect perfectly at one point, but has a certain deviation from the position of the paraxial image point. These differences are collectively called aberrations.

[0097] Axial chromatic aberration (longitudinal spherical aberration), also known as longitudinal chromatic aberration or position chromatic aberration or axial aberration, is a beam of light parallel to the optical axis that converges at different positions before and after passing through the lens. This aberration is called position chromatic aberration or axial chromatic aberration. This is because the positions of the images of light of different wavelengths formed by the lens are different, so that the image-side focal planes of light of different colors cannot overlap when the final image is formed, and the complex light spreads out to form dispersion.

[0098] 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 due to the influence of aperture spherical aberration. The height of the intersection of the main light of different fields of view with the Gaussian image plane after passing through the optical system is not equal to the ideal image height. The difference between the two is the distortion. Therefore, distortion only changes the 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.

[0099] Astigmatism, because the object point is not on the optical axis of the optical system, the light beam it emits has an inclination angle with the optical axis. After the light beam is refracted by the lens, the convergence point of its meridional beamlet and sagittal beamlet is not at the same point. That is, the light beam cannot be focused on one point, and the image is not clear, so astigmatism occurs. Meridian beamlet and sagittal beamlet are the names of light beams in two perpendicular planes in a rotationally symmetric optical system.

[0100] Meridian plane: The plane formed by the chief ray (chief light beam) of an object point outside the optical axis and the optical axis is called the meridian plane.

[0101] Sagittal plane: The plane that passes through the main ray (main light beam) of the object point outside the optical axis and is perpendicular to the meridian plane is called the sagittal plane.

[0102] Field curvature is used to indicate the difference between the clearest image point position of the non-central field of view light after passing through the optical lens group and the clearest image point position of the central field of view on the optical axis. When the lens has field curvature, the intersection point 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, the entire image plane is a curved surface.

[0103] The technical solution in the embodiment of the present application will be described below in conjunction with the accompanying drawings. In the description of the embodiment of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiment of the present application, "multiple" means two or more than two.

[0104] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0105] In addition, in the embodiments of the present application, the limitations of the relative position relationship mentioned, such as parallel, vertical, etc. These limitations are all for the current state of the art, rather than absolutely strict limitations, and a small amount of deviation is allowed, and it is possible to be approximately parallel, approximately vertical, etc. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0106] The embodiments of the present application provide a camera module and an electronic device including the camera module. The camera module includes a first optical element, a second optical element and a photosensitive element arranged from the object side to the image side. The first optical element includes an incident surface, a first reflection surface and an exit surface arranged from the object side to the image side, the incident surface is a convex surface near the optical axis, the first reflection surface is used to change the propagation direction of the optical axis, and the exit surface is a concave surface near the optical axis. The second optical element includes at least one lens. During the anti-shake process of the camera module, the first optical element moves and the photosensitive element remains fixed. At this time, the camera module can drive the first optical element to move through a conventional anti-shake motor, and there is no need to set an anti-shake drive mechanism on the photosensitive element, so the cost of the optical anti-shake mechanism of the camera module can be reduced. Furthermore, since the first optical element is provided with an incident surface having a convex structure and an exit surface having a concave structure, the incident surface and the exit surface move synchronously with the reflecting surface. Therefore, during the anti-shake process of the camera module, the incident surface can collect light and the exit surface can compensate for the aberration, which is beneficial to reducing the module size of the camera module, realizing the miniaturization of the camera module, and can enhance the anti-shake effect of the camera module and improve the imaging quality of the camera module.

[0107] Among them, electronic devices can be mobile phones, tablet computers, laptops, cameras, wearable devices and other devices with photo or video recording functions, and wearable devices can be bracelets, watches, glasses and other devices.

[0108] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the structure of the electronic device 100 provided in some embodiments of the present application, Figure 2 yes Figure 1 The schematic diagram of the partially exploded structure of the electronic device 100 is shown. In this embodiment, the electronic device 100 is described as a mobile phone. It can be understood that Figure 1 and Figure 2 Only some components of the electronic device 100 are schematically shown, and the actual shapes, sizes, positions and structures of these components are not subject to the present invention. Figure 1 and Figure 2 The electronic device 100 may also include Figure 1 and Figure 2 More or fewer parts.

[0109] In some embodiments, the electronic device 100 may include a screen 10, a back shell 20, a camera module 30, and a camera decorative cover 40. The screen 10 is used to display images, videos, etc. The screen 10 includes a light-transmitting cover plate 101 and a display screen 102. The light-transmitting cover plate 101 and the display screen 102 are stacked and fixedly connected. The light-transmitting cover plate 101 is mainly used to protect and dustproof 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 may be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MID) display screen, a micro organic light-emitting diode (MID) display screen, a micro organic light-emitting diode (MID) display screen, a quantum dot light emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0110] Exemplarily, the back shell 20 is used to protect the internal electronic components of the electronic device 100. The back shell 20 includes a back cover 201 and a frame 202. 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 on the back cover 201. Exemplarily, the frame 202 can be fixedly connected to the back cover 201 by adhesive. The frame 202 can also be an integrally formed structure with the back cover 201, that is, the frame 202 and the back cover 201 are 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 gluing. The light-transmitting cover plate 101, the back cover 201 and the frame 202 enclose the internal accommodation space of the electronic device 100. The internal accommodation space accommodates the display screen 102.

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

[0112] Exemplarily, the light incident surface of the camera module 30 faces the back cover 201. The back cover 201 is provided with a mounting opening 2011, and the camera decorative cover 40 covers and is fixed at the mounting opening 2011. The camera decorative cover 40 is used to protect the camera module 30. In some embodiments, the camera decorative cover 40 protrudes to the side of the back cover 201 away from the light-transmitting cover plate 101. In this way, the camera decorative cover 40 can increase the installation space of the camera module 30 in the thickness direction of the electronic device 100. In other embodiments, the camera decorative cover 40 can also be flush with the back cover 201 or recessed into the internal accommodation space of the electronic device 100. A light-transmitting window 401 is provided on the camera decorative cover 40. The light-transmitting window 401 allows scene light to enter the light incident surface of the camera module 30. In this embodiment, the camera module 30 is used as a rear camera module of the electronic device 100. Exemplarily, the two camera modules 30 may be camera module 301 and camera module 302, respectively. Camera module 301 may be used as a rear main camera module, and camera module 302 may be used as a rear telephoto camera module. In other embodiments, the electronic device 100 may further include another camera module 30 used as a rear wide-angle camera module.

[0113] In other embodiments, the light incident surface of the camera module 30 faces the light-transmitting cover plate 101. A light path avoidance hole is provided on the display screen 102. The light path avoidance hole allows the scene light to pass through the light-transmitting cover plate 101 and then enter the light incident surface of the camera module 30. In this way, the camera module 30 is used as a front camera module of the electronic device 100.

[0114] In some embodiments, Figure 2 As shown, the electronic device 100 also includes a circuit board 50 and an image processor 60, and the circuit board 50 and the image processor 60 are located in the internal accommodation space of the electronic device 100, and the image processor 60 is fixed to the circuit board 50 and electrically connected to the circuit board 50. The image processor 60 is communicatively connected to the camera module 30. The image processor 60 is used to obtain image data from the camera module 30 and process the image data. Among them, the communication connection between the camera module 30 and the image processor 60 may include data transmission through electrical connection methods such as wiring, and data transmission may also be achieved through coupling and other methods. It is understandable that the camera module 30 and the image processor 60 may also be communicatively connected through other methods that can achieve data transmission.

[0115] In some embodiments, the electronic device 100 may further include an analog-to-digital converter (also referred to as an A / D converter, not shown in the figure). The analog-to-digital converter is connected between the camera module 30 and the image processor 60. The analog-to-digital converter is used to convert the signal generated by the camera module 30 into a digital image signal and transmit it to the image processor 60, and then the digital image signal is processed by the image processor 60, and finally the image or video is displayed on the screen 10.

[0116] In some embodiments, the electronic device 100 may further include a memory (not shown in the figure), which is in communication with the image processor 60. The image processor 60 processes the image digital signal and then transmits the image to the memory, so that when the image needs to be viewed later, the image can be searched from the memory at any time and displayed on the screen 10. In some embodiments, the image processor 60 also compresses the processed image digital signal and stores it in the memory to save memory space.

[0117] In other embodiments, the electronic device 100 may not include the screen 10 and / or the camera decorative cover 40 .

[0118] Understandably, Figure 1 and Figure 2 The installation position of the camera module 30 of the electronic device 100 in the illustrated embodiment is merely illustrative, and the present application does not strictly limit the installation position of the camera module 30. In some other embodiments, the camera module 30 may also be installed at other positions of the electronic device 100, for example, the camera module 30 may be installed at the upper middle or upper right corner of the back of the electronic device 100. In some other embodiments, the electronic device 100 may include a terminal body and an auxiliary component that can be rotated, moved or disassembled relative to the terminal body, and the camera module 30 may also be arranged on the auxiliary component.

[0119] See also Figure 3 and Figure 4 , Figure 3 yes Figure 2 The camera module 302 shown in FIG. 3 is a partial structural diagram of some embodiments. Figure 4 yes Figure 3 The illustrated diagram is a schematic diagram of the optical path structure of the camera module 302 in some usage states.

[0120] In some embodiments, the camera module 302 includes a telephoto lens 1, a photosensitive element 2, and a filter 3. The photosensitive element 2 is located on the image side of the telephoto lens 1. The camera module 302 may also include a circuit board (not shown in the figure), and the photosensitive element 2 may be fixed to the circuit board. The filter 3 may be located between the telephoto lens 1 and the photosensitive element 2. Light can pass through the telephoto lens 1 and illuminate the photosensitive surface of the photosensitive element 2. Exemplarily, the working principle of the camera module 302 is as follows: the light reflected by the photographed scene generates an optical image through the telephoto lens 1 and is projected onto the photosensitive surface of the photosensitive element 2. The photosensitive element 2 converts the optical image into an electrical signal, i.e., an analog image signal, and transmits it to the analog-to-digital converter, so as to be converted into a digital image signal through the analog-to-digital converter and given to the image processor 60.

[0121] The photosensitive element 2 (also called an image sensor) is a semiconductor chip, which contains hundreds of thousands to millions of photodiodes on its surface. When exposed to light, it will generate electric charge. The photosensitive element 2 can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). A charge coupled device is made of a highly sensitive semiconductor material and can convert light into electric charge. A 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 will reflect the charge on the component, and the signals generated by all the photosensitive units are added together to form a complete picture. Complementary metal oxide semiconductor devices mainly use semiconductors made of two elements, silicon and germanium, so that semiconductors with N (-charged) and P (+charged) levels coexist on the complementary metal oxide semiconductor device. The current generated by these two complementary effects can be recorded and interpreted into an image by the processing chip.

[0122] The telephoto lens 1 mainly uses the refraction principle of the lens to form an image, that is, the light of the scene passes through the telephoto 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.

[0123] The filter 3 is used to filter out unnecessary bands in the light to prevent the photosensitive element 2 from generating false colors or ripples, so as to improve its effective resolution and color reproduction. Exemplarily, the filter 3 can be an infrared filter. In this embodiment, the filter 3 is an independent component. In some other embodiments, the filter structure can also be eliminated, and at least one optical element of the telephoto lens 1 can be subjected to surface treatment or material treatment to achieve filtering. This application does not strictly limit the specific embodiments of the structural components or structures used to achieve filtering.

[0124] The telephoto lens 1 can be a vertical lens or a periscope lens. This embodiment is described by taking the telephoto lens 1 as a periscope lens as an example. When the telephoto lens 1 is a periscope lens, it can be better applied to thin electronic devices.

[0125] In some embodiments, the telephoto lens 1 includes a first optical element G1 and a second optical element G2, and the second optical element G2 is located on the image side of the first optical element G1. Exemplarily, the first optical element G1 includes an incident surface 11, a first reflecting surface 12, and an exit surface 13 arranged from the object side to the image side. The incident surface 11 is convex at the near optical axis. The first reflecting surface 12 changes the propagation direction of the optical axis from the first direction Z to the second direction X, and the second direction X intersects with the first direction Z. For example, the second direction X is perpendicular to the first direction Z. The exit surface 13 is concave at the near optical axis. The second optical element G2 includes at least one lens. The photosensitive element 2 is located on the image side of the second optical element G2.

[0126] Exemplarily, the first optical element G1 is a movable structure, the photosensitive element 2 is a fixed structure, and the camera module 302 realizes optical image stabilization through the movement of the first optical element G1. During the image stabilization process of the camera module 302, the first optical element G1 rotates around the first direction Z and / or around the third direction Y, and the photosensitive element 2 remains fixed. The third direction Y intersects with the first direction Z and the second direction X. For example, the third direction Y can be perpendicular to the second direction X and perpendicular to the first direction Z.

[0127] In the embodiment of the present application, the camera module 302 can drive the first optical element G1 to move through a conventional anti-shake motor, and there is no need to set an anti-shake driving mechanism on the photosensitive element 2, so the cost of the optical anti-shake mechanism of the camera module 302 can be reduced. In addition, since the first optical element G1 is provided with an incident surface 11 with a convex structure and an exit surface 13 with a concave structure, the incident surface 11 and the exit surface 13 move synchronously with the first reflective surface 12, so during the anti-shake process of the camera module 302, the incident surface 11 can collect light, and the exit surface 13 can compensate for aberrations, which is conducive to reducing the module size of the camera module 302, realizing the miniaturization of the camera module 302, and can improve the anti-shake effect of the camera module 302 and the imaging quality of the camera module 302.

[0128] In addition, in the conventional solution of achieving anti-shake by driving the image sensor to tilt (shift), since an anti-shake driving mechanism needs to be arranged around the image sensor, the structural design and circuit design of the anti-shake driving mechanism are relatively complex and require a large installation space. Therefore, when a photosensitive element with a sensor diagonal greater than 10 mm is required, the module size of the camera module is at least 32 mm or more. In the embodiment of the present application, for photosensitive elements of the same size, since the photosensitive element 2 is a fixed structure, there is no need to arrange an anti-shake driving mechanism, and the camera module 302 does not need to reserve an installation space for the anti-shake driving mechanism around the photosensitive element 2, so the module size of the camera module 302 can be reduced, which is conducive to the miniaturization of the camera module 302. In some embodiments, the module size can be reduced to less than 31 mm.

[0129] In addition, when the overall volume of the camera module 302 is limited, since there is no need to reserve installation space for the anti-shake drive structure around the photosensitive element 2, the arrangement space of the photosensitive element 2 is relatively ample. The camera module 302 can select a photosensitive element 2 with a larger photosensitive area, which is conducive to realizing a large target surface of the camera module 302.

[0130] Therefore, the camera module 302 of the embodiment of the present application can achieve long-focus shooting with a large target area, low cost, small size and high imaging quality.

[0131] Exemplarily, the half sensor diagonal ImgH of the photosensitive element 2 may satisfy: 2.5mm≤ImgH≤8.16mm. In the embodiment of the present application, since the photosensitive element 2 has a relatively ample arrangement space, the camera module 302 has a smaller size limit on the photosensitive element 2, so the photosensitive element 2 can flexibly select a larger target surface or a smaller target surface as needed. Exemplarily, the half sensor diagonal ImgH of the photosensitive element 2 may satisfy: 4.2mm≤ImgH≤8.16mm, for example, the half sensor diagonal ImgH of the photosensitive element 2 may be 4.4mm, 5.11mm, 6.2mm, 6.8mm, 7.3mm, etc. Alternatively, the half sensor diagonal ImgH of the photosensitive element 2 may satisfy: 2.5mm≤ImgH≤4.0mm, for example, the half sensor diagonal ImgH of the photosensitive element 2 may be 2.8mm, 3.2mm, 3.6mm, 3.8mm, etc.

[0132] In some embodiments, the focal length F1 of the first optical element G1 and the focal length Fsys of the telephoto lens 1 may satisfy: F1 / Fsys≥1.2. For example, the value of F1 / Fsys may be 1.5, 1.82, 2.17, 2.23, 2.76, 3.19, 7.3, 12.46, 15.66, 18, etc. In this embodiment, by setting the ratio of the focal length of the first optical element G1 to the focal length of the telephoto lens 1 to be greater than or equal to 1.2, the camera module 302 can have better image clarity when anti-shake is achieved through the movement of the first optical element G1, so as to obtain better imaging quality.

[0133] Exemplarily, the focal length F1 of the first optical element G1 and the focal length Fsys of the telephoto lens 1 can satisfy: 22.5≥F1 / Fsys≥1.2. In this embodiment, the camera module 302 can be more easily miniaturized while taking into account the imaging quality by further limiting the ratio F1 / Fsys of the focal length F1 of the first optical element G1 and the focal length Fsys of the telephoto lens 1. Among them, the larger the value of F1 / Fsys, the larger the focal length F1 of the first optical element G1, and the easier it is for the camera module 302 to obtain better image clarity when achieving anti-shake through the movement of the first optical element G1; the smaller the value of F1 / Fsys, the smaller the focal length F1 of the first optical element G1, and the easier it is for the camera module 302 to achieve miniaturization of the module.

[0134] In some embodiments, the focal length Fsys of the telephoto lens 1 may satisfy: 10mm≤Fsys≤40mm. For example, the focal length Fsys of the telephoto lens 1 may be 12mm, 14.8994mm, 15mm, 18.9mm, 19.7997mm, 20mm, 22.5mm, 24mm, 28mm, etc. Among them, the focal length Fsys of the telephoto lens 1 may also satisfy: 14mm≤Fsys≤25mm.

[0135] In some embodiments, the focal length F1 of the first optical element G1 satisfies: F1 ≤ 380 mm. For example, the focal length F1 of the first optical element G1 may be 38.5 mm, 41.049 mm, 44.236 mm, 47.5816 mm, 52.2544 mm, 146.05 mm, 180 mm, 210.32 mm, 240 mm, etc. Among them, the focal length F1 of the first optical element G1 may also satisfy: F1 ≤ 180 mm. In this embodiment, the camera module 302 takes into account both imaging quality and module miniaturization by limiting the value of the focal length F1 of the first optical element G1.

[0136] In some embodiments, the incident surface 11 of the first optical element G1 may be a spherical surface to reduce the difficulty of processing. The exit surface 13 of the first optical element G1 may be a spherical surface to reduce the difficulty of processing. In other embodiments, the incident surface 11 and / or the exit surface 13 may also be aspherical surfaces.

[0137] In some embodiments, the radius of curvature L1S1R of the incident surface 11 of the first optical element G1 may satisfy: 6mm≤L1S1R≤300mm. For example, the radius of curvature L1S1R of the incident surface 11 may be 9mm, 12.25mm, 13.5904mm, 13.6843mm, 13.8907mm, 14.9683mm, 17.748mm, 19.5mm, 21mm, 38mm, 100mm, etc. Among them, when the radius of curvature L1S1R of the incident surface 11 is larger, the incident surface 11 is easier to process, and when the radius of curvature L1S1R of the incident surface 11 is smaller, the light collection effect of the incident surface 11 is better. In this embodiment, the value of the radius of curvature L1S1R of the incident surface 11 is limited to a certain range, so that the processing difficulty of the incident surface 11 is relatively small and the light collection effect is better.

[0138] Exemplarily, the curvature radius L1S1R of the incident surface 11 of the first optical element G1 may satisfy: 6mm≤L1S1R≤23mm. In this embodiment, the incident surface 11 is easy to process and has a good light collection effect. The curvature radius L1S1R of the incident surface 11 may also satisfy: 10mm≤L1S1R≤20mm.

[0139] In some embodiments, the radius of curvature L2S2R of the exit surface 13 of the first optical element G1 may satisfy: 10mm≤L2S2R≤300mm. For example, the radius of curvature L2S2R of the exit surface 13 may be 13.25mm, 15.8mm, 17.686mm, 21.7868mm, 26.4989mm, 27.8264mm, 33.8659mm, 43.5mm, 62mm, 100mm, etc. Among them, when the radius of curvature L2S2R of the exit surface 13 is larger, the exit surface 13 is easier to process, and when the radius of curvature L2S2R of the exit surface 13 is smaller, the exit surface 13 can better achieve aberration compensation. In this embodiment, by limiting the value of the radius of curvature L2S2R of the exit surface 13 within a certain range, the processing difficulty of the exit surface 13 is relatively small, and the effect of aberration compensation is better.

[0140] Exemplarily, the curvature radius L2S2R of the exit surface 13 of the first optical element G1 may satisfy: 15mm≤L2S2R≤300mm. In this embodiment, the exit surface 13 is easy to process and can better compensate for aberrations. The curvature radius L2S2R of the exit surface 13 may also satisfy: 16mm≤L2S2R≤40mm.

[0141] In some embodiments, the radius of curvature L1S1R of the incident surface 11 of the first optical element G1 and the focal length Fsys of the telephoto lens 1 may satisfy: 0.4≤L1S1R / Fsys≤6. For example, the value of L1S1R / Fsys may be 0.45, 0.56, 0.69, 0.72, 0.73, 0.75, 1.19, 1.28, 2.4, 3, 4.5, etc. For example, the radius of curvature L1S1R of the incident surface 11 and the focal length Fsys of the telephoto lens 1 may also satisfy: 0.4≤L1S1R / Fsys≤1.4. Alternatively, the radius of curvature L1S1R of the incident surface 11 and the focal length Fsys of the telephoto lens 1 may also satisfy: 0.6≤L1S1R / Fsys≤1.2. In this embodiment, the camera module 302 limits the value of L1S1R / Fsys to better balance the light collection performance and the optical image stabilization performance.

[0142] Exemplarily, the radius of curvature L2S2R of the exit surface 13 of the first optical element G1 and the focal length Fsys of the telephoto lens 1 may satisfy: 0.4≤L2S2R / Fsys≤10. For example, the value of L2S2R / Fsys may be 0.48, 0.76, 0.95, 1.15, 1.32, 1.41, 2.27, 3.8, 4.9, 5.8, etc. For example, the radius of curvature L2S2R of the exit surface 13 and the focal length Fsys of the telephoto lens 1 may also satisfy: 0.9≤L2S2R / Fsys≤6. Alternatively, the radius of curvature L2S2R of the exit surface 13 and the focal length Fsys of the telephoto lens 1 may also satisfy: 1.1≤L2S2R / Fsys≤3. In this embodiment, the camera module 302 limits the value of L2S2R / Fsys to achieve better imaging quality and optical image stabilization performance.

[0143] In some embodiments, Figure 3 As shown, the first optical element G1 may include a first lens L1 and a second lens L2. The first lens L1 is located on the object side of the first reflective surface 12, and the object side surface of the first lens L1 is the incident surface 11 of the first optical element G1. The second lens L2 is located on the image side of the first reflective surface 12, and the image side surface of the second lens L2 is the exit surface 13 of the first optical element G1. The first lens L1 and / or the second lens L2 may be formed by injection molding, molding, polishing and grinding. The first lens L1 and / or the second lens L2 may be made of glass material or plastic material.

[0144] Exemplarily, the first lens L1 may have positive focal length, and the first lens L1 may be used to shrink the light beam. Exemplarily, the first lens L1 may be a convex lens. In this embodiment, since the light beam entering the telephoto lens 1 begins to shrink after passing through the first lens L1, when it reaches the second optical element G2 after being reflected by the first reflective surface 12, it has already shrunk over a long optical path, and the light beam diameter is small, and the second optical element G2 no longer becomes the maximum limit of the light aperture of the telephoto lens 1. Therefore, under a certain device thickness, even if the size of the second optical element G2 is limited by the device thickness, by setting the first lens L1 with positive focal length in the first optical element G1, it is possible to effectively increase the light aperture of the telephoto lens 1 while taking into account the module size, thereby achieving a large aperture.

[0145] In some embodiments, the aperture value of the telephoto lens 1 may be less than or equal to 2.4. For example, the aperture value of the telephoto lens 1 may be 1.4, 1.56, 1.66, 2.06, 2.16, 2.24, 2.36, etc.

[0146] Among them, the focal length f1 of the first lens L1 and the focal length Fsys of the telephoto lens 1 can satisfy: 0.5≤f1 / Fsys≤20. For example, the value of f1 / Fsys can be 0.8, 1.16, 1.19, 1.41, 1.67, 1.92, 2.8, 3.9, 5.6, etc. For example, the focal length f1 of the first lens L1 and the focal length Fsys of the telephoto lens 1 can also satisfy: 1.1≤L2S2R / Fsys≤1.7 or 1.9≤L2S2R / Fsys≤12. In this embodiment, the camera module 302 can better balance the light collection performance and the optical image stabilization performance by limiting the value of f1 / Fsys.

[0147] For example, the second lens L2 may have negative optical power to better compensate for aberrations and improve the imaging quality of the camera module 302. In addition, the second lens L2 can reduce the incident angle of the light beam on the second optical element G2, reduce the design difficulty of the second optical element G2, and achieve better imaging effects.

[0148] Among them, the focal length f2 of the second lens L2 and the focal length Fsys of the telephoto lens 1 can satisfy: -20≤f2 / Fsys≤0. For example, the value of f2 / Fsys can be -8.8, -5.6, -3.67, -2.88, -1.86, -1.51, -1.49, -1.2, -0.8, etc. For example, the focal length f2 of the second lens L2 and the focal length Fsys of the telephoto lens 1 can also satisfy: -12≤f2 / Fsys≤-1.48 or -1.2≤L2S2R / Fsys≤-0.5. In this embodiment, the camera module 302 can better image quality and optical image stabilization performance by limiting the value of f2 / Fsys.

[0149] In some embodiments, when the camera module 302 is installed on the electronic device 100, the first direction Z may be parallel to the thickness direction of the electronic device 100, and the second direction X may be parallel to the length direction or the width direction of the electronic device 100. In the embodiment of the present application, the specific directions of the first direction Z and the second direction X are not strictly limited.

[0150] In this embodiment, the telephoto lens 1 changes the propagation direction of the light by setting the first reflective surface 12 in the first optical element G1, so that the propagation direction of the light beam in the second optical element G2 can be different from the direction of the light beam entering the electronic device 100, thereby making the placement position, angle, space, etc. of the camera module 302 more flexible, and the telephoto lens 1 can be applied to the periscope camera module 302. In addition, since the first reflective surface 12 realizes the turning of the light path, it plays a role in compressing the module size, which is conducive to the miniaturization of the camera module 302.

[0151] In some embodiments, the first optical element G1 may further include a first reflector 1a, and the first reflector 1a includes a first reflective surface 12 of the first optical element G1. For example, the first reflector 1a may be a prism. In this case, one of the surfaces of the first reflector 1a forms the first reflective surface 12. For example, the first reflector 1a may include an object side, a reflective surface, and an image side. The object side of the first reflector 1a faces the first lens L1, and the image side of the first reflector 1a faces the second lens L2. The reflective surface of the first reflector 1a forms the first reflective surface 12; light enters from the object side of the first reflector 1a, is reflected from the reflective surface of the first reflector 1a (that is, the first reflective surface 12), and then is emitted from the image side of the first reflector 1a. The first reflector 1a may be formed by injection molding, molding, polishing, or grinding. The first reflector 1a may be made of glass or plastic.

[0152] Exemplarily, the refractive index Nd of the first reflector 1a may satisfy: Nd≤1.85. For example, the refractive index Nd of the first reflector 1a may be 1.49, 1.54, 1.62, 1.72, etc. For example, the refractive index Nd of the first reflector 1a may also satisfy: Nd≤1.78. In this embodiment, by limiting the value of the refractive index Nd of the first reflector 1a, since the refractive index Nd is inversely proportional to the Abbe number, the Abbe number of the first reflector 1a is relatively high, so that it has a higher dispersion performance, so as to ensure that no excessive residual chromatic aberration is generated, and reduce the design difficulty of the lens group located on its image side.

[0153] Exemplarily, the first reflective surface 12 can be a plane to have good processability. In other embodiments, the first reflective surface 12 can also correct aberrations such as astigmatism when realizing light reflection, so as to further improve image quality or reduce volume. For example, the first reflective surface 12 can also be a spherical surface, a cylindrical surface, or a free-form surface. Among them, the spherical surface can be convex or concave. The cylindrical surface has a curvature in one direction and extends in a straight line in another direction. Exemplarily, a high-reflective film can also be provided on the first reflective surface 12 to improve the reflection efficiency, so that the light of the light beam enters the subsequent optical element after being completely reflected or nearly completely reflected.

[0154] In the embodiment of the present application, the incident surface 11, the first reflecting surface 12, and the emitting surface 13 of the first optical element G1 maintain a fixed relative position relationship.

[0155] In some embodiments, the image side surface of the first lens L1 is fixed to the object side surface of the first reflector 1a, and the object side surface of the second lens L2 is fixed to the image side surface of the first reflector 1a. The image side surface of the first lens L1 can be a plane, and / or the object side surface of the second lens L2 can be a plane. At this time, after the first optical element G1 is assembled, the assembly structure of the first lens L1 and / or the second lens L2 and the first reflector 1a is compact, which is conducive to miniaturization of the camera module 302.

[0156] Exemplarily, the first lens L1, the first reflector 1a and the second lens L2 can all be made of glass, and the first lens L1 is glued to the first reflector 1a, and the second lens L2 is glued to the first reflector 1a. In this embodiment, the connection between the first lens L1 and the first reflector 1a, and the connection between the second lens L2 and the first reflector 1a are both glass-to-glass glue connections, and the connection process is stable and reliable, so that the assembly yield of the first optical element G1 is high and the optical performance of the first optical element G1 is better. In some other embodiments, the connection between the first lens L1 and the first reflector 1a, and the connection between the second lens L2 and the first reflector 1a can also be achieved by a stamping process.

[0157] In some other embodiments, the first lens L1, the first reflector 1a and the second lens L2 may also be integrally formed structural components, that is, the first optical element G1 may be an integral special-shaped prism.

[0158] In some other embodiments, the first lens L1, the second lens L2 and the first reflector 1a may also be made of different materials, which is not strictly limited in the present application. When the materials of the first lens L1 and the second lens L2 are different, the aberration can be reduced. The first lens L1 and the second lens L2 may have different temperature characteristics, such as thermal expansion coefficient, light refractive index temperature coefficient, etc., to reduce the influence of ambient temperature.

[0159] In some other embodiments, there may be a gap between the first lens L1 and the object side surface of the first reflector 1a, and / or there may be a gap between the second lens L2 and the image side surface of the first reflector 1a. In this case, the first lens L1 and / or the second lens L2 may be fixed to the first reflector 1a by a structure such as a lens barrel.

[0160] In some other embodiments, the first reflector 1a of the first optical element G1 may also be a reflector, in which case the mirror surface of the reflector forms the first reflective surface 12. The structural member forming the incident surface 11 (e.g., the first lens L1) and the structural member forming the exit surface 13 (e.g., the second lens L2) may be fixed to the first reflector 1a via a lens barrel or other structural member, so that the relative positions of the incident surface 11, the exit surface 13, and the reflective surface are fixed.

[0161] In the embodiment of the present application, the first optical element G1 may include 2 to 3 lenses. For example, Figure 3 In the illustrated embodiment, the first optical element G1 includes two lenses. In some other embodiments, the first optical element G1 may also include a lens with negative optical power, located on the image side of the first lens L1 and on the object side of the first reflective surface 12, which is used in conjunction with the first lens L1 to form a positive and negative lens coordination structure, which can better solve aberration problems such as chromatic aberration.

[0162] In some embodiments, the second optical element G2 may include at least two lenses to form at least one lens group. The camera module 302 may achieve focusing by moving one or more lens groups along the optical axis.

[0163] In some embodiments, Figure 3 As shown, the second optical element G2 may include a first lens group G21 and a second lens group G22. The second lens group G22 is located on the image side of the first lens group G21. The camera module 302 can achieve focusing by moving the first lens group G21 and / or the second lens group G22 along the optical axis.

[0164] In this embodiment, the second optical element G2 includes two lens groups, and the camera module 302 can achieve automatic focusing by moving at least one of the lens groups, which is conducive to macro photography.

[0165] Exemplarily, the first lens group G21 has positive focal power, and the second lens group G22 has negative focal power. In some examples, the first lens group G21 is a movable lens group, the second lens group G22 is a fixed lens group, and the camera module 302 achieves focusing by moving the first lens group G21 along the optical axis. At this time, the focusing stroke of the first lens group G21 is small, which can effectively suppress the deterioration of aberrations caused by focusing, so that the camera module 302 has a strong focusing ability, the imaging quality of the camera module 302 is high, and it has a strong macro capability. Since the focusing stroke of the first lens group G21 is small, it is beneficial to reduce the volume of the motor used to drive the first lens group G21 to move, so that the camera module 302 is easier to miniaturize. In addition, the second lens group G22 can play the role of a flat field lens to compensate for part of the field curvature changes caused by focusing, thereby enhancing the focusing ability of the first lens group G21, so that the camera module 302 has a strong focusing ability and higher imaging quality.

[0166] In other embodiments, the first lens group G21 is a fixed lens group, the second lens group G22 is a movable lens group, and the camera module 302 achieves focusing by moving the second lens group G22 along the optical axis.

[0167] In other embodiments, the first lens group G21 and the second lens group G22 are both movable lens groups, and the camera module 302 can achieve focusing by moving the first lens group G21 and the second lens group G22 along the optical axis. During the focusing process, the moving directions of the first lens group G21 and the second lens group G22 can be the same or different, and the moving distances can be the same or different. At this time, in this embodiment, the focusing speed of the camera module 302 is fast, the focusing stroke of the lens group is small, and the camera module can achieve macro shooting.

[0168] In some embodiments, the focal length F2 of the first lens group G21 and the focal length Fsys of the telephoto lens 1 may satisfy: 0.2≤F2 / Fsys≤1. For example, the value of F2 / Fsys may be 0.28, 0.38, 0.46, 0.51, 0.53, 0.57, 0.72, 0.8, etc. For example, the focal length F2 of the first lens group G21 and the focal length Fsys of the telephoto lens 1 may also satisfy: 0.3≤F2 / Fsys≤0.6.

[0169] In this embodiment, by setting F2 / Fsys≤1, focusing can be achieved by moving the first lens group G21 with a smaller displacement, thereby reducing the focusing stroke and improving the focusing ability; by setting 0.2≤F2 / Fsys, it is beneficial to control the aberration of the light beam passing through the first lens group G21, making it easier to correct the aberration of the second lens group G22, and the camera module 302 has better imaging quality; therefore, by reasonably designing the ratio of the focal length F2 of the first lens group G21 to the focal length Fsys of the telephoto lens 1, the camera module 302 can take into account both focusing ability and imaging quality.

[0170] Exemplarily, the focal length F3 of the second lens group G22 and the focal length Fsys of the telephoto lens 1 may satisfy: -1.5≤F3 / Fsys≤-0.2. For example, the value of F3 / Fsys may be -1.2, -1.12, -1, -0.87, -0.44, -0.39, -0.36, -0.34, -0.26, etc. For example, the focal length F3 of the second lens group G22 and the focal length Fsys of the telephoto lens 1 may also satisfy: -0.9≤F3 / Fsys≤-0.3.

[0171] In this embodiment, by reasonably designing the ratio of the focal length F3 of the second lens group G22 to the focal length Fsys of the telephoto lens 1, the camera module 302 can balance the image quality difference between long-range shooting and close-range shooting at a relatively low assembly sensitivity, thereby obtaining a more uniform image quality. When the assembly sensitivity is low, the allowable deviation (tolerance) range of the telephoto lens 1 during assembly is larger, and the assembly is easy.

[0172] It is understandable that the above-mentioned limitations on the ratio ranges of the focal length F1 of the first optical element G1, the focal length F2 of the first lens group G21, and the focal length F3 of the second lens group G22 to the focal length Fsys of the telephoto lens 1 can exist independently of each other or can be combined with each other. When the above-mentioned three ratio ranges are combined with each other, the telephoto lens 1 can obtain a better aperture value, focusing ability, imaging quality and processability; wherein, in some embodiments, the camera module 302 can realize both long-range shooting and macro shooting within 20 cm, such as 10 cm, 5 cm or 3 cm macro shooting, through the telephoto lens 1.

[0173] In some embodiments, the first lens group G21 may include 3 to 5 lenses, and the second lens group G22 may include 1 to 4 lenses. Figure 3 As shown, the first lens group G21 may include 4 lenses, namely a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The second lens group G22 may include 2 lenses, namely a seventh lens L7 and an eighth lens L8.

[0174] Among them, the first lens (for example, the third lens L3) closest to the object side of the first lens group G21 can have positive optical power, so that the light beam passing through the first optical element G1 can smoothly enter the first lens group G21 to improve the imaging quality of the camera module 302.

[0175] Among them, the last lens of the second lens group G22 closest to the image side (for example, the eighth lens L8) can have negative optical power to compensate for aberrations to improve the imaging quality of the camera module 302.

[0176] Exemplarily, the first lens group G21 and / or the second lens group G22 may include at least two lenses of different materials to have different Abbe numbers to reduce the impact of chromatic aberration on image quality. Wherein, when the material of one lens of the first lens group G21 and / or the second lens group G22 is different from that of the other lens, it can be considered that the first lens group G21 and / or the second lens group G22 includes at least two lenses of different materials. Wherein, the two lenses of different materials may have different temperature characteristics, such as thermal expansion coefficient, light refractive index temperature coefficient, etc., to reduce the impact of ambient temperature. For example, the two lenses of different materials may be made of glass and plastic, respectively.

[0177] In other embodiments, the camera module 302 can also achieve focusing by moving the second optical element G2 along the optical axis. In this case, the multiple lenses of the second optical element G2 form a lens group. In this embodiment, the optical path design and structural design of the camera module 302 are relatively simple and easy to implement, and the camera module 302 has better processability.

[0178] Exemplarily, the second optical element G2 has positive focal length. The second optical element G2 may include 3 to 6 lenses. In some embodiments, the first lens of the second optical element G2 closest to the object side may have positive focal length; the last lens of the second optical element G2 closest to the image side may have negative focal length. In this case, the optical path design of the camera module 302 is simple and the imaging quality is high.

[0179] In some other embodiments, the second optical element G2 may also include three or more lens groups.

[0180] In some embodiments, Figure 3 As shown, the telephoto lens 1 may further include a third optical element G3, and the third optical element G3 includes a second reflective surface 14. The second reflective surface 14 is located on the image side of the second optical element G2, and the second reflective surface 14 changes the propagation direction of the optical axis from the second direction X to a fourth direction Z', and the fourth direction Z' intersects the second direction X. Since the second reflective surface 14 can change the propagation direction of the light path, it plays a role in compressing the size, which is conducive to miniaturization of the camera module 302.

[0181] The fourth direction Z' may be perpendicular to the second direction X. For example, the fourth direction Z' may be parallel to the first direction Z, so as to be parallel to the thickness direction of the electronic device 100. At this time, the arrangement plane of the photosensitive element 2 may be perpendicular to the thickness direction of the electronic device 100, and the size of the target surface is not limited by the size of the thickness direction of the electronic device 100, which is conducive to the large target surface design of the camera module 302. In other embodiments, the fourth direction Z' may also be located in other directions, and the specific direction of the fourth direction Z' is not strictly limited in the embodiment of the present application.

[0182] In this embodiment, the optical axis O includes a first portion O1 from the object side of the first lens L1 to the first reflective surface 12, a second portion O2 from the first reflective surface 12 to the second reflective surface 14, and a third portion O3 from the second reflective surface 14 to the photosensitive element 2. During the focusing process of the camera module 302, the first optical element G1 and the third optical element G3 remain stationary, and part or the entirety of the second optical element G2 moves along the second portion O2 of the optical axis O to achieve focusing. Since the first portion O1, the second portion O2, and the third portion O3 of the optical axis O do not change during the focusing process, the thickness of the optical system of the telephoto lens 1 is the sum of the first portion O1 of the optical axis O and the third portion O3 of the optical axis O. Therefore, the focusing stroke of the telephoto lens 1 does not cause an increase in the thickness of the optical system, which is conducive to the miniaturization of the telephoto lens 1 and the camera module 302.

[0183] Exemplarily, the second reflective surface 14 can be a plane to have good processability. In other embodiments, the second reflective surface 14 can also correct aberrations such as astigmatism when realizing light reflection, so as to further improve image quality or reduce volume. For example, the second reflective surface 14 can also be a spherical surface, a cylindrical surface, or a free-form surface. Among them, the spherical surface can be convex or concave. The cylindrical surface has a curvature in one direction and extends in a straight line in another direction. Exemplarily, a high-reflective film can also be provided on the second reflective surface 14 to improve the reflection efficiency, so that the light of the light beam enters the subsequent optical element after being completely reflected or nearly completely reflected.

[0184] Exemplarily, the third optical element G3 may include a second reflective member 1b, the second reflective member 1b includes a second reflective surface 14, and the second reflective member 1b may be a prism or a reflector. When the second reflective member 1b is a prism, the refractive index of the second reflective member 1b may be different from or the same as the refractive index of the first reflective member 1a.

[0185] In some other embodiments, the third optical element G3 may further include at least one lens, such as one or two lenses, to further adjust the optical path and improve the imaging quality of the camera module 302 .

[0186] In some other embodiments, the telephoto lens 1 may not include the third optical element G3. In this case, the light beam enters the photosensitive element 2 along the second direction X, and the arrangement plane of the photosensitive element 2 is perpendicular to the second direction X.

[0187] In some embodiments, the total optical length TTL of the telephoto lens 1 and the focal length Fsys of the telephoto lens 1 may satisfy: 0.8≤TTL / Fsys≤3. For example, the value of TTL / Fsys may be 1.0, 1.29, 1.35, 1.43, 1.51, 1.8, 2.4, etc.

[0188] In this embodiment, by limiting the ratio of the total optical length TTL of the telephoto lens 1 to the focal length Fsys of the telephoto lens 1, the telephoto lens 1 takes into account both the telephoto shooting requirement and the short total length requirement. The thickness of the telephoto lens 1 is relatively small, which is conducive to the miniaturization of the camera module 302.

[0189] Exemplarily, the total optical length TTL of the telephoto lens 1 may satisfy: 15mm≤TTL≤50mm. For example, the value of the total optical length TTL may be 22mm, 24.46mm, 26.8042mm, 27.0324mm, 27.083mm, 29.908mm, 35mm, 40mm, etc. For example, the total optical length TTL of the telephoto lens 1 may also satisfy: 15mm≤TTL≤30mm.

[0190] In some embodiments, the field of view angle of the telephoto lens 1 is less than or equal to 40°. For example, the field of view angle of the telephoto lens 1 may be 30°, 32°, 35°, 38°, etc. In this embodiment, by limiting the field of view angle of the telephoto lens 1, the camera module 302 can better achieve telephoto shooting, and has better optical image stabilization performance and better imaging quality.

[0191] In some embodiments, the optical surface of at least one lens of the telephoto lens 1 is an aspherical surface, and the aspherical optical surface has different optical powers from the paraxial to the outer field of view area, so that the image quality is more balanced. And / or, the optical surface of at least one lens of the telephoto lens 1 can be a free-form surface to correct aberrations. Among them, the aspherical surface is a surface that is rotationally symmetric around the optical axis O; the free-form surface can have no symmetry axis, or can be symmetric along a certain direction, or can be symmetric along two directions.

[0192] In some embodiments, multiple lenses of the telephoto lens 1 are assembled through an active alignment (AA) process to ensure assembly accuracy.

[0193] In some embodiments, the telephoto lens 1 further includes an aperture stop (not shown in the figure). Exemplarily, the aperture stop can be installed on the second optical element G2. In this case, the aperture adjustment effect of the aperture stop is better, which can improve the imaging quality of the telephoto lens 1. For example, the aperture stop can be installed on the object side of the first lens group G21, that is, the aperture stop is installed between the second lens L2 and the third lens L3. In some other embodiments, the aperture stop can also be installed at other positions of the telephoto lens 1, and the embodiments of the present application are not strictly limited to this.

[0194] The aperture diaphragm may be a spacer ring structure or a variable fan blade structure; or, the aperture diaphragm may be realized by a surface spraying process, for example, by spraying a light-shielding material on a lens to form an aperture diaphragm. The position of the aperture diaphragm may be fixed or variable. For example, the position of the aperture diaphragm is variable, and the aperture diaphragm may be adjusted according to the focusing condition to be located between different lenses.

[0195] In some embodiments, at least one lens of the telephoto lens 1 may adopt a special-shaped technology to reduce the size of the telephoto lens 1. For example, the second lens L2 or at least one lens in the second optical element G2 may have a cutout for reducing the height of the lens. The cutout may be implemented by an I-CUT process. By providing a cutout for reducing the height of the lens on the second lens L2 or at least one lens in the second optical element G2, the size of the telephoto lens 1 in the height direction can be effectively reduced, so that the telephoto lens 1 can be better applied to miniaturized electronic devices 100, thereby increasing the scope of application of the telephoto lens 1. In addition, since the height of the lens is reduced by the cutout, the lens can be provided with a larger light-transmitting aperture, thereby increasing the light transmittance of the telephoto lens 1, so that the imaging quality of the telephoto lens 1 is better. Among them, special-shaped technology can also be used on the structural support members of the lens such as the lens barrel and the spacer to reduce the size of the telephoto lens 1.

[0196] In some embodiments, the peripheral side surface or supporting surface of at least one lens of the telephoto lens 1 can be blackened or roughened to eliminate stray light and improve the image quality. The blackening treatment can be coated or plated with a matte material such as black ink, or it can be a film. The roughening treatment is mainly used to increase the roughness. Of course, in some other embodiments, the telephoto lens 1 can also eliminate stray light by other means, and the embodiments of the present application are not strictly limited to this.

[0197] In some embodiments, the materials used for different lenses of the telephoto lens 1 may have different temperature characteristics, for example, glass and plastic may be used respectively to reduce the influence of the ambient temperature.

[0198] In some embodiments, a diffraction structure (not shown) may be formed on the optical surface of at least one lens of the telephoto lens 1. In this embodiment, by properly setting the diffraction structure, chromatic aberration can be reduced and the volume of the telephoto lens 1 can also be reduced.

[0199] In some embodiments, the telephoto lens 1 may further include a liquid lens (not shown). For example, the liquid lens may be located between the first optical element G1 and the second optical element G2. In this embodiment, the focusing effect may be enhanced by the liquid lens to achieve ultra-macro photography. The liquid lens is a structural component that uses liquid as a lens and changes the focal length by changing the curvature of the liquid.

[0200] The following combines data and simulation results to present Figure 3 The camera module 302 is shown as a concrete solution in a possible embodiment.

[0201] Please refer to Table 1a and Table 1b, where Table 1a is Figure 3 The curvature radius (R), spacing (D), refractive index (Nd), and Abbe number of each lens, reflector, and filter of the camera module 302 shown in a possible embodiment when focusing on a distant view. The spacing includes the thickness of the structure itself and the spacing between the structures. Table 1b is Figure 3 Aspherical coefficients of various lenses of the telephoto lens 1 in a possible embodiment are shown.

[0202] Table 1a

[0203]

[0204]

[0205] Table 1b

[0206] Face number A4 A6 A8 A10 5 -3.58E-03 -3.20E-04 2.96E-05 -8.88E-07 6 -5.32E-04 -2.09E-04 -2.66E-05 2.37E-06 7 -2.81E-03 -1.70E-04 -4.99E-05 3.89E-06 8 -1.56E-03 -3.00E-04 1.24E-05 5.46E-08 9 4.69E-03 3.10E-04 -6.40E-05 2.46E-06 10 2.96E-03 -1.92E-05 -4.16E-05 2.05E-06 11 2.88E-03 -3.22E-04 2.80E-05 -3.27E-07 12 1.24E-03 -5.56E-05 3.11E-05 3.59E-07 13 1.79E-02 -1.36E-03 8.12E-05 -5.55E-06 14 1.63E-02 -1.02E-03 1.23E-05 -3.74E-06 15 -4.57E-03 -1.76E-04 -8.65E-06 -6.36E-06 16 -3.47E-03 1.52E-04 -1.74E-05 5.42E-07

[0207] The aspherical surface of the telephoto lens 1 in Table 1a can be defined by, but not limited to, the following aspherical surface curve equation:

[0208]

[0209] Where z is the relative distance between a point on the aspherical surface and the intersection point on the optical axis; r is the vertical distance between the point on the aspherical curve and the optical axis; c is the curvature; k is the cone coefficient, which is 0; α i is the i-th order aspheric coefficient, see Table 1b.

[0210] Please refer to Table 1c, which is Figure 3The basic parameters of the camera module 302 in a possible embodiment are shown in Table 1c. In Table 1c, ImgH is the half sensor diagonal of the photosensitive element 2, Fsys is the focal length of the telephoto lens 1, f1 is the focal length of the first lens L1, f2 is the focal length of the second lens L2, F1 is the focal length of the first optical element G1, F2 is the focal length of the first lens group G21 of the second optical element G2, F3 is the focal length of the second lens group G22 of the second optical element G2, and TTL is the total optical length of the telephoto lens 1.

[0211] Table 1c

[0212] Parameters(mm) Ih Aperture value Fsys f1 f2 F1 F2 F3 TTL Numeric 5.11 2.06 19.7997 27.998 -56.93 44.236 9.1324 -7.21 29.908

[0213] In this embodiment, the camera module 302 includes a telephoto lens 1, a filter and a photosensitive element 2 arranged from the object side to the image side. The telephoto lens 1 includes a first optical element G1, a second optical element G2 and a third optical element G3 arranged from the object side to the image side. The first optical element G1 includes a first lens L1, a first reflector 1a and a second lens L2 arranged from the object side to the image side. The object side surface of the first lens L1 forms an incident surface 11 of the first optical element G1, and the incident surface 11 is convex near the optical axis. The first reflector 1a includes a first reflective surface 12, and the first reflective surface 12 is used to change the propagation direction of the optical axis. The first reflector 1a is a prism. The image side surface of the second lens L2 forms an exit surface 13 of the second optical element G2, and the exit surface 13 is concave near the optical axis.

[0214] The second optical element G2 includes a first lens group G21 and a second lens group G22 located on the image side of the first lens group G21. The first lens group G21 includes a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 arranged from the object side to the image side. The second lens group G22 includes a seventh lens L7 and an eighth lens L8 located on the image side of the seventh lens L7. The third optical element G3 includes a second reflector 1b, the second reflector 1b includes a second reflective surface 14, the second reflective surface 14 is used to change the propagation direction of the optical axis, and the second reflector 1b is a prism.

[0215] During the anti-shake process of the camera module 302, the first optical element G1 moves, and the photosensitive element 2 remains fixed. At this time, the camera module 302 can drive the first optical element G1 to move through a conventional anti-shake motor, and there is no need to set an anti-shake driving mechanism on the photosensitive element 2, so the cost of the optical anti-shake mechanism of the camera module 302 can be reduced. In addition, since the first optical element G1 is provided with an incident surface 11 with a convex structure and an exit surface 13 with a concave structure, the incident surface 11 and the exit surface 13 move synchronously with the reflection surface, so during the anti-shake process of the camera module 302, the incident surface 11 can collect light, and the exit surface 13 can compensate for aberrations, which is conducive to reducing the module size of the camera module 302, realizing the miniaturization of the camera module 302, and can improve the anti-shake effect of the camera module 302 and the imaging quality of the camera module 302.

[0216] Among them, the ratio of the focal length F1 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is F1 / Fsys=2.23; the ratio of the curvature radius L1S1R of the incident surface 11 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is L1S1R / Fsys=0.69; the ratio of the curvature radius L2S2R of the exit surface 13 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is L2S2R / Fsys=1.41.

[0217] Wherein, the ratio of the focal length f1 of the first lens L1 to the focal length Fsys of the telephoto lens 1 is f1 / Fsys=1.41; the ratio of the focal length f2 of the second lens L2 to the focal length Fsys of the telephoto lens 1 is f2 / Fsys=-2.88.

[0218] The first lens group G21 is a movable lens group, and the second lens group G22 is a fixed lens group. During the focusing process of the camera module 302, the first lens group G21 moves along the optical axis. The ratio of the focal length F2 of the first lens group G21 to the focal length Fsys of the telephoto lens 1 is F2 / Fsys=0.46; the ratio of the focal length F3 of the second lens group G22 to the focal length Fsys of the telephoto lens 1 is F3 / Fsys=-0.36. The focusing stroke of the first lens group G21 can be around 2.2 mm. The camera module 302 can achieve macro shooting, for example, 50 mm macro shooting can be achieved.

[0219] The ratio of the total optical length TTL of the telephoto lens 1 to the focal length Fsys of the telephoto lens 1 is TTL / Fsys=1.51.

[0220] See also Figure 5 , Figure 5 yes Figure 3 The illustrated diagram is a simulation effect diagram of the camera module 302 in a possible embodiment.

[0221] in, Figure 5 It includes the axial chromatic aberration curve diagram, astigmatism field curvature diagram and distortion diagram of the telephoto lens 1. Among them, the axial chromatic aberration curve diagram includes spherical aberration curves corresponding to different bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm in the figure); its physical meaning is the deviation of the light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system; its abscissa is the deviation value along the optical axis direction, and its ordinate is the normalized coordinate at the pupil. Figure 5 The values ​​shown in the figure are all small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the telephoto lens 1 is well corrected. The astigmatism field curvature diagram is used to illustrate the deviation of the convergence point of fine beams of different fields of view from the ideal imaging surface. It is the sagittal direction beam, and Y is the meridian direction beam. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the corresponding field of view. When a field of view value is too large, the image quality of the field of view is poor or there are high-level aberrations. Figure 5 The field curvature in both directions is small, and the system has a good depth of focus. The distortion diagram is used to characterize the relative deviation between the convergence point of the light beam (actual image height) in different fields of view and the ideal image height. Figure 5 All shown are within 2.5%, ensuring there is no obvious distortion in the image.

[0222] Please refer to Figure 6 and Figure 7 , Figure 6 yes Figure 2 The camera module 302 is a partial structural diagram of some other embodiments. Figure 7 yes Figure 6 The illustrated diagram is a schematic diagram of the optical path structure of the camera module 302 in some usage states. Figure 6 The camera module 302 shown includes Figure 3 Most of the technical features of the camera module 302 are shown. The following mainly describes the differences between the two, and most of the same contents between the two are not repeated.

[0223] In some embodiments, the camera module 302 includes a telephoto lens 1, a filter and a photosensitive element 2 arranged from the object side to the image side, and the telephoto lens 1 includes a first optical element G1 and a second optical element G2 arranged from the object side to the image side. The first optical element G1 includes a first lens L1, a first reflector 1a and a second lens L2 arranged from the object side to the image side. The object side surface of the first lens L1 forms an incident surface 11 of the first optical element G1, and the incident surface 11 is convex near the optical axis. The first reflector 1a includes a first reflective surface 12, and the first reflective surface 12 is used to change the propagation direction of the optical axis. The first reflector 1a is a prism. The image side surface of the second lens L2 forms an exit surface 13 of the second optical element G2, and the exit surface 13 is concave near the optical axis. During the anti-shake process of the camera module 302, the first optical element G1 moves and the photosensitive element 2 remains fixed.

[0224] The second optical element G2 includes a first lens group G21 and a second lens group G22 located on the image side of the first lens group G21. The first lens group G21 includes a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 arranged from the object side to the image side. The second lens group G22 includes a seventh lens L7 and an eighth lens L8 located on the image side of the seventh lens L7. The first lens group G21 is a movable lens group, and the second lens group G22 is a fixed lens group. During the focusing process of the camera module 302, the first lens group G21 moves along the optical axis.

[0225] The optical axis O includes a first portion from the object-side surface of the first lens L1 to the first reflective surface 12 and a second portion from the first reflective surface 12 to the photosensitive element 2 .

[0226] The following combines data and simulation results to present Figure 6 The telephoto lens 1 is shown as a concrete solution in a possible embodiment.

[0227] Please refer to Table 2a and Table 2b, where Table 2a is Figure 6 The curvature radius (R), spacing (D), refractive index (Nd), and Abbe number of each lens, reflector, and filter of the camera module 302 shown in a possible embodiment when focusing on a distant view. The spacing includes the thickness of the structure itself and the spacing between the structures. Table 2b is Figure 6 Aspherical coefficients of various lenses of the telephoto lens 1 in a possible embodiment are shown.

[0228] Table 2a

[0229] Face number illustrate Surface type Radius of curvature interval Refractive Index Abbe number 1 L1 Spherical 17.7482 2.7 1.62 63.39 2 First reflecting member 1a Spherical Infinity 8.1240 1.62 63.39 3 L2 Spherical Infinity 0.32 1.62 63.39 4 Spherical 33.8659 3.1314 STO Aperture stop 5 L3 Aspheric 9.8262 1.0364 1.54 56.02 6 Aspheric -15.0354 0.2043 7 L4 Aspheric -28.2310 0.2638 1.67 19.24 8 Aspheric 8.5474 0.0818 9 L5 Aspheric 20.8563 1.2813 1.54 55.73 10 Aspheric -31.9381 0.04 11 L6 Aspheric 21.5641 1.8941 1.61 25.70 12 Aspheric -7.2217 0.4501 13 L7 Aspheric -6.9960 0.3260 1.65 21.45 14 Aspheric -8.4858 2.0848 15 L8 Aspheric -5.4402 3.1566 1.54 56.02 16 Aspheric 13.8118 1.2996 17 Optical Filters Spherical Infinity 0.11 1.52 64.19 18 Spherical Infinity 0.3 19 Imaging surface Spherical Infinity 0

[0230] Table 2b

[0231] Face number A4 A6 A8 A10 5 -3.58E-03 -3.20E-04 2.96E-05 -8.88E-07 6 -5.32E-04 -2.09E-04 -2.66E-05 2.37E-06 7 -2.81E-03 -1.70E-04 -4.99E-05 3.89E-06 8 -1.56E-03 -3.00E-04 1.24E-05 5.46E-08 9 4.69E-03 3.10E-04 -6.40E-05 2.46E-06 10 2.96E-03 -1.92E-05 -4.16E-05 2.05E-06 11 2.88E-03 -3.22E-04 2.80E-05 -3.27E-07 12 1.24E-03 -5.56E-05 3.11E-05 3.59E-07 13 1.79E-02 -1.36E-03 8.12E-05 -5.55E-06 14 1.63E-02 -1.02E-03 1.23E-05 -3.74E-06 15 -4.57E-03 -1.76E-04 -8.65E-06 -6.36E-06 16 -3.47E-03 1.52E-04 -1.74E-05 5.42E-07

[0232] The aspherical surface of the telephoto lens 1 in Table 2a can be defined by, but not limited to, the following aspherical surface curve equation:

[0233]

[0234] Where z is the relative distance between a point on the aspherical surface and the intersection point on the optical axis; r is the vertical distance between the point on the aspherical curve and the optical axis; c is the curvature; k is the cone coefficient, which is 0; α i is the i-th order aspheric coefficient, see Table 2b.

[0235] Please refer to Table 2c, which is Figure 6The basic parameters of the camera module 302 in a possible embodiment are shown in Table 2c. In Table 2c, ImgH is the half sensor diagonal of the photosensitive element 2, Fsys is the focal length of the telephoto lens 1, f1 is the focal length of the first lens L1, f2 is the focal length of the second lens L2, F1 is the focal length of the first optical element G1, F2 is the focal length of the first lens group G21 of the second optical element G2, F3 is the focal length of the second lens group G22 of the second optical element G2, and TTL is the total optical length of the telephoto lens 1.

[0236] Table 2c

[0237] Parameters(mm) Ih Aperture value Fsys f1 f2 F1 F2 F3 TTL Numeric 3.6 1.66 14.8994 28.6363 -54.64 47.5816 7.5559 -5.8251 26.8042

[0238] In this embodiment, the ratio of the focal length F1 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is F1 / Fsys=3.19; the ratio of the curvature radius L1S1R of the incident surface 11 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is L1S1R / Fsys=1.19; the ratio of the curvature radius L2S2R of the exit surface 13 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is L2S2R / Fsys=2.27.

[0239] Wherein, the ratio of the focal length f1 of the first lens L1 to the focal length Fsys of the telephoto lens 1 is f1 / Fsys=1.92; the ratio of the focal length f2 of the second lens L2 to the focal length Fsys of the telephoto lens 1 is f2 / Fsys=-3.67.

[0240] The ratio of the focal length F2 of the first lens group G21 to the focal length Fsys of the telephoto lens 1 is F2 / Fsys=0.51; the ratio of the focal length F3 of the second lens group G22 to the focal length Fsys of the telephoto lens 1 is F3 / Fsys=-0.39. The focusing stroke of the first lens group G21 can be about 2.5 mm. The camera module 302 can achieve macro photography, for example, 30 mm macro photography.

[0241] The ratio of the total optical length TTL of the telephoto lens 1 to the focal length Fsys of the telephoto lens 1 is TTL / Fsys=1.8.

[0242] See also Figure 8 , Figure 8 yes Figure 6 The illustrated diagram is a simulation effect diagram of the camera module 302 in a possible embodiment.

[0243] in, Figure 8It includes the axial chromatic aberration curve diagram, astigmatism field curvature diagram and distortion diagram of the telephoto lens 1. Among them, the axial chromatic aberration curve diagram includes spherical aberration curves corresponding to different bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm in the figure), the abscissa of which is the deviation value along the optical axis direction, and the ordinate is the normalized coordinate at the pupil. Figure 8 The values ​​shown in the figure are all small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the telephoto lens 1 is well corrected. The astigmatism field curvature diagram is used to illustrate the deviation of the convergence point of fine beams of different fields of view from the ideal imaging surface. It is the sagittal direction beam, and Y is the meridian direction beam. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the corresponding field of view. When a field of view value is too large, the image quality of the field of view is poor or there are high-level aberrations. Figure 8 The field curvature in both directions is small, and the system has a good depth of focus. The distortion diagram is used to characterize the relative deviation between the convergence point of the light beam (actual image height) in different fields of view and the ideal image height. Figure 8 All shown are within 2.5%, ensuring there is no obvious distortion in the image.

[0244] Please refer to Fig. 9 and Fig.10 , Fig. 9 yes Figure 2 The camera module 302 is a partial structural diagram of some other embodiments. Fig.10 yes Fig. 9 The illustrated diagram is a schematic diagram of the optical path structure of the camera module 302 in some usage states. Fig. 9 The camera module 302 shown includes Figure 6 Most of the technical features of the camera module 302 are shown. The following mainly describes the differences between the two, and most of the same contents between the two are not repeated.

[0245] In some embodiments, the camera module 302 includes a telephoto lens 1, a filter and a photosensitive element 2 arranged from the object side to the image side, and the telephoto lens 1 includes a first optical element G1 and a second optical element G2 arranged from the object side to the image side. The first optical element G1 includes a first lens L1, a first reflector 1a and a second lens L2 arranged from the object side to the image side. The object side surface of the first lens L1 forms an incident surface 11 of the first optical element G1, and the incident surface 11 is convex near the optical axis. The first reflector 1a includes a first reflective surface 12, and the first reflective surface 12 is used to change the propagation direction of the optical axis. The first reflector 1a is a prism. The image side surface of the second lens L2 forms an exit surface 13 of the second optical element G2, and the exit surface 13 is concave near the optical axis. During the anti-shake process of the camera module 302, the first optical element G1 moves and the photosensitive element 2 remains fixed.

[0246] The second optical element G2 includes a first lens group G21 and a second lens group G22 located on the image side of the first lens group G21. The first lens group G21 includes a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 arranged from the object side to the image side. The second lens group G22 includes a seventh lens L7 and an eighth lens L8 located on the image side of the seventh lens L7. The first lens group G21 is a fixed lens group, and the second lens group G22 is a movable lens group. During the focusing process of the camera module 302, the second lens group G22 moves along the optical axis.

[0247] The optical axis O includes a first portion from the object-side surface of the first lens L1 to the first reflective surface 12 and a second portion from the first reflective surface 12 to the photosensitive element 2 .

[0248] The following combines data and simulation results to present Fig. 9 The telephoto lens 1 is shown as a concrete solution in a possible embodiment.

[0249] Please refer to Table 3a and Table 3b together. Table 3a is Fig. 9 The curvature radius (R), spacing (D), refractive index (Nd), and Abbe number of each lens, reflector, and filter of the camera module 302 shown in a possible embodiment when focusing on a distant view. The spacing includes the thickness of the structure itself and the spacing between the structures. Table 3b is Fig. 9 Aspherical coefficients of various lenses of the telephoto lens 1 in a possible embodiment are shown.

[0250] Table 3a

[0251]

[0252]

[0253] Table 3b

[0254] Face number A4 A6 A8 A10 5 -1.77E-03 -1.33E-04 4.01E-06 8.98E-08 6 2.84E-04 4.76E-06 -5.72E-06 -1.58E-07 7 3.23E-04 -9.49E-05 1.65E-05 -1.34E-06 8 2.82E-04 -1.11E-04 2.31E-05 -1.25E-06 9 5.14E-03 1.95E-04 -2.57E-05 8.16E-07 10 1.85E-03 5.23E-05 -2.16E-05 1.34E-06 11 -1.26E-03 -5.95E-05 -6.86E-06 3.39E-07 12 -5.89E-04 -8.72E-05 2.73E-06 -6.52E-08 13 1.09E-02 -6.44E-04 3.44E-05 -7.84E-07 14 1.01E-02 -4.54E-04 1.72E-05 -1.39E-07 15 -3.44E-03 3.27E-05 3.00E-06 -9.12E-07 16 -2.88E-03 1.01E-04 -4.57E-06 5.55E-08

[0255] The aspherical surface of the telephoto lens 1 in Table 3a can be defined by, but not limited to, the following aspherical surface curve equation:

[0256]

[0257] Where z is the relative distance between a point on the aspherical surface and the intersection point on the optical axis; r is the vertical distance between the point on the aspherical curve and the optical axis; c is the curvature; k is the cone coefficient, which is 0; α i is the i-th order aspheric coefficient, see Table 3b.

[0258] Please refer to Table 3c, which is Fig. 9The basic parameters of the camera module 302 in a possible embodiment are shown in Table 3c. In Table 3c, ImgH is the half sensor diagonal of the photosensitive element 2, Fsys is the focal length of the telephoto lens 1, f1 is the focal length of the first lens L1, f2 is the focal length of the second lens L2, F1 is the focal length of the first optical element G1, F2 is the focal length of the first lens group G21 of the second optical element G2, F3 is the focal length of the second lens group G22 of the second optical element G2, and TTL is the total optical length of the telephoto lens 1.

[0259] Table 3c

[0260] Parameters(mm) Ih Aperture value Fsys f1 f2 F1 F2 F3 TTL Numeric 5.11 2.16 18.9 21.9277 -35.1525 41.049 9.9385 -8.23 24.46

[0261] In this embodiment, the ratio of the focal length F1 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is F1 / Fsys=2.17; the ratio of the curvature radius L1S1R of the incident surface 11 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is L1S1R / Fsys=0.72; the ratio of the curvature radius L2S2R of the exit surface 13 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is L2S2R / Fsys=1.15.

[0262] Wherein, the ratio of the focal length f1 of the first lens L1 to the focal length Fsys of the telephoto lens 1 is f1 / Fsys=1.16; the ratio of the focal length f2 of the second lens L2 to the focal length Fsys of the telephoto lens 1 is f2 / Fsys=-1.86.

[0263] The ratio of the focal length F2 of the first lens group G21 to the focal length Fsys of the telephoto lens 1 is F2 / Fsys=0.53; the ratio of the focal length F3 of the second lens group G22 to the focal length Fsys of the telephoto lens 1 is F3 / Fsys=-0.44. The focusing stroke of the second lens group G22 can be about 2.0 mm. The camera module 302 can achieve macro photography, for example, 100 mm macro photography.

[0264] The ratio of the total optical length TTL of the telephoto lens 1 to the focal length Fsys of the telephoto lens 1 is TTL / Fsys=1.29.

[0265] See also Fig.11 , Fig.11 yes Fig. 9 The illustrated diagram is a simulation effect diagram of the camera module 302 in a possible embodiment.

[0266] in, Fig.11It includes the axial chromatic aberration curve diagram, astigmatism field curvature diagram and distortion diagram of the telephoto lens 1. Among them, the axial chromatic aberration curve diagram includes spherical aberration curves corresponding to different bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm in the figure), the abscissa of which is the deviation value along the optical axis direction, and the ordinate is the normalized coordinate at the pupil. Fig.11 The values ​​shown in the figure are all small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the telephoto lens 1 is well corrected. The astigmatism field curvature diagram is used to illustrate the deviation of the convergence point of fine beams of different fields of view from the ideal imaging surface. It is the sagittal direction beam, and Y is the meridian direction beam. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the corresponding field of view. When a field of view value is too large, the image quality of the field of view is poor or there are high-level aberrations. Fig.11 The field curvature in both directions is small, and the system has a good depth of focus. The distortion diagram is used to characterize the relative deviation between the convergence point of the light beam (actual image height) in different fields of view and the ideal image height. Fig.11 All shown are within 2.5%, ensuring there is no obvious distortion in the image.

[0267] Please refer to Fig.12 and Fig.13 , Fig.12 yes Figure 2 The camera module 302 is a partial structural diagram of some other embodiments. Fig.13 yes Fig.12 The illustrated diagram is a schematic diagram of the optical path structure of the camera module 302 in some usage states. Fig.12 The camera module 302 shown includes Figure 6 Most of the technical features of the camera module 302 are shown. The following mainly describes the differences between the two, and most of the same contents between the two are not repeated.

[0268] In some embodiments, the camera module 302 includes a telephoto lens 1, a filter and a photosensitive element 2 arranged from the object side to the image side, and the telephoto lens 1 includes a first optical element G1 and a second optical element G2 arranged from the object side to the image side. The first optical element G1 includes a first lens L1, a first reflector 1a and a second lens L2 arranged from the object side to the image side. The object side surface of the first lens L1 forms an incident surface 11 of the first optical element G1, and the incident surface 11 is convex near the optical axis. The first reflector 1a includes a first reflective surface 12, and the first reflective surface 12 is used to change the propagation direction of the optical axis. The first reflector 1a is a prism. The image side surface of the second lens L2 forms an exit surface 13 of the second optical element G2, and the exit surface 13 is concave near the optical axis. During the anti-shake process of the camera module 302, the first optical element G1 moves and the photosensitive element 2 remains fixed.

[0269] The second optical element G2 includes a first lens group G21 and a second lens group G22 located on the image side of the first lens group G21. The first lens group G21 includes a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 arranged from the object side to the image side. The second lens group G22 includes a seventh lens L7 and an eighth lens L8 located on the image side of the seventh lens L7. The first lens group G21 is a movable lens group, and the second lens group G22 is a fixed lens group. During the focusing process of the camera module 302, the first lens group G21 moves along the optical axis.

[0270] The optical axis O includes a first portion from the object-side surface of the first lens L1 to the first reflective surface 12 and a second portion from the first reflective surface 12 to the photosensitive element 2 .

[0271] The following combines data and simulation results to present Fig.12 The telephoto lens 1 is shown as a concrete solution in a possible embodiment.

[0272] Please refer to Table 4a and Table 4b. Table 4a is Fig.12 The curvature radius (R), spacing (D), refractive index (Nd), and Abbe number of each lens, reflector, and filter of the camera module 302 shown in a possible embodiment when focusing on a distant view. The spacing includes the thickness of the structure itself and the spacing between the structures. Table 4b is Fig.12 Aspherical coefficients of various lenses of the telephoto lens 1 in a possible embodiment are shown.

[0273] Table 4a

[0274] Face number illustrate Surface type Radius of curvature interval Refractive Index Abbe number 1 L1 Spherical 13.8907 1.4347 1.62 63.39 2 First reflecting member 1a Spherical Infinity 8.1514 1.62 63.39 3 L2 Spherical Infinity 0.32 1.62 63.39 4 Spherical 17.6860 2.3350 STO Aperture stop 5 L3 Aspheric 7.9738 0.7397 1.54 56.02 6 Aspheric -139.1539 1.2185 7 L4 Aspheric -6.3542 0.2 1.67 19.24 8 Aspheric 7.9593 0.3055 9 L5 Aspheric -35.2693 0.9969 1.54 55.73 10 Aspheric -7.5067 0.04 11 L6 Aspheric 8.0904 1.2815 1.61 25.70 12 Aspheric -10.3562 0.4642 13 L7 Aspheric -7.3233 0.4492 1.65 21.45 14 Aspheric -5.6051 1.4968 15 L8 Aspheric -8.9995 0.2 1.54 56.02 16 Aspheric 15.3732 7.0397 17 Optical Filters Spherical Infinity 0.11 1.52 64.19 18 Spherical Infinity 0.3 19 Imaging surface Spherical Infinity 0

[0275] Table 4b

[0276] Face number A4 A6 A8 A10 5 -1.14E-03 3.28E-06 -2.10E-05 9.79E-08 6 1.62E-03 2.40E-06 -1.56E-05 -2.51E-07 7 5.39E-03 -3.90E-04 2.55E-05 -1.48E-06 8 -2.16E-03 7.38E-05 2.43E-05 -2.31E-06 9 4.02E-03 1.93E-04 -3.86E-06 -1.49E-06 10 6.00E-03 1.35E-04 -6.63E-05 2.48E-06 11 -4.88E-04 -6.61E-06 -1.08E-05 7.87E-07 12 -6.83E-04 1.59E-04 -8.47E-06 5.78E-07 13 6.67E-03 5.45E-05 1.97E-05 -2.07E-06 14 8.19E-03 -1.38E-04 4.72E-05 -4.35E-06 15 -5.03E-03 6.12E-05 -6.75E-06 -2.65E-06 16 -7.80E-03 5.69E-04 -5.35E-05 1.89E-06

[0277] The aspherical surface of the telephoto lens 1 in Table 4a can be defined by, but not limited to, the following aspherical surface curve equation:

[0278]

[0279] Where z is the relative distance between a point on the aspherical surface and the intersection point on the optical axis; r is the vertical distance between the point on the aspherical curve and the optical axis; c is the curvature; k is the cone coefficient, which is 0; α i is the i-th order aspheric coefficient, see Table 4b.

[0280] Please refer to Table 4c, which is Fig.12The basic parameters of the camera module 302 in a possible embodiment are shown in Table 4c. In Table 4c, ImgH is the half sensor diagonal of the photosensitive element 2, Fsys is the focal length of the telephoto lens 1, f1 is the focal length of the first lens L1, f2 is the focal length of the second lens L2, F1 is the focal length of the first optical element G1, F2 is the focal length of the first lens group G21 of the second optical element G2, F3 is the focal length of the second lens group G22 of the second optical element G2, and TTL is the total optical length of the telephoto lens 1.

[0281] Table 4c

[0282] Parameters(mm) Ih Aperture value Fsys f1 f2 F1 F2 F3 TTL Numeric 5.11 2.06 18.9 22.4123 -28.5359 52.2544 10.8329 -16.4699 27.083

[0283] In this embodiment, the ratio of the focal length F1 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is F1 / Fsys=2.76; the ratio of the radius of curvature L1S1R of the incident surface 11 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is L1S1R / Fsys=0.73; the ratio of the radius of curvature L2S2R of the exit surface 13 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is L2S2R / Fsys=0.94.

[0284] Wherein, the ratio of the focal length f1 of the first lens L1 to the focal length Fsys of the telephoto lens 1 is f1 / Fsys=1.19; the ratio of the focal length f2 of the second lens L2 to the focal length Fsys of the telephoto lens 1 is f2 / Fsys=-1.51.

[0285] The ratio of the focal length F2 of the first lens group G21 to the focal length Fsys of the telephoto lens 1 is F2 / Fsys=0.57; the ratio of the focal length F3 of the second lens group G22 to the focal length Fsys of the telephoto lens 1 is F3 / Fsys=-0.87. The focusing stroke of the second lens group G22 can be about 1.735 mm. The camera module 302 can achieve macro photography, for example, 100 mm macro photography.

[0286] The ratio of the total optical length TTL of the telephoto lens 1 to the focal length Fsys of the telephoto lens 1 is TTL / Fsys=1.43.

[0287] See also Fig.14 , Fig.14 yes Fig.12 The illustrated diagram is a simulation effect diagram of the camera module 302 in a possible embodiment.

[0288] in, Fig.14It includes the axial chromatic aberration curve diagram, astigmatism field curvature diagram and distortion diagram of the telephoto lens 1. Among them, the axial chromatic aberration curve diagram includes spherical aberration curves corresponding to different bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm in the figure), the abscissa of which is the deviation value along the optical axis direction, and the ordinate is the normalized coordinate at the pupil. Fig.14 The values ​​shown in the figure are all small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the telephoto lens 1 is well corrected. The astigmatism field curvature diagram is used to illustrate the deviation of the convergence point of fine beams of different fields of view from the ideal imaging surface. It is the sagittal direction beam, and Y is the meridian direction beam. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the corresponding field of view. When a field of view value is too large, the image quality of the field of view is poor or there are high-level aberrations. Fig.14 The field curvature in both directions is small, and the system has a good depth of focus. The distortion diagram is used to characterize the relative deviation between the convergence point of the light beam (actual image height) in different fields of view and the ideal image height. Fig.14 All shown are within 2.5%, ensuring there is no obvious distortion in the image.

[0289] Please refer to Fig.15 and Fig.16 , Fig.15 yes Figure 2 The camera module 302 is a partial structural diagram of some other embodiments. Fig.16 yes Fig.15 The illustrated diagram is a schematic diagram of the optical path structure of the camera module 302 in some usage states. Fig.15 The camera module 302 shown includes Figure 6 Most of the technical features of the camera module 302 are shown. The following mainly describes the differences between the two, and most of the same contents between the two are not repeated.

[0290] In some embodiments, the camera module 302 includes a telephoto lens 1, a filter and a photosensitive element 2 arranged from the object side to the image side, and the telephoto lens 1 includes a first optical element G1 and a second optical element G2 arranged from the object side to the image side. The first optical element G1 includes a first lens L1, a first reflector 1a and a second lens L2 arranged from the object side to the image side. The object side surface of the first lens L1 forms an incident surface 11 of the first optical element G1, and the incident surface 11 is a convex surface near the optical axis, and the incident surface 11 is an aspherical surface. The first reflector 1a includes a first reflective surface 12, and the first reflective surface 12 is used to change the propagation direction of the optical axis. The first reflector 1a is a reflector. The image side surface of the second lens L2 forms an exit surface 13 of the second optical element G2, and the exit surface 13 is a concave surface near the optical axis, and the exit surface 13 is an aspherical surface. During the anti-shake process of the camera module 302, the first optical element G1 moves and the photosensitive element 2 remains fixed.

[0291] The second optical element G2 includes a first lens group G21 and a second lens group G22 located on the image side of the first lens group G21. The first lens group G21 includes a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 arranged from the object side to the image side. The second lens group G22 includes a seventh lens L7 and an eighth lens L8 located on the image side of the seventh lens L7. The first lens group G21 and the second lens group G22 are both movable lens groups. During the focusing process of the camera module 302, the first lens group G21 and the second lens group G22 move along the optical axis.

[0292] The optical axis O includes a first portion from the object-side surface of the first lens L1 to the first reflective surface 12 and a second portion from the first reflective surface 12 to the photosensitive element 2 .

[0293] The following combines data and simulation results to present Fig.15 The telephoto lens 1 is shown as a concrete solution in a possible embodiment.

[0294] Please refer to Table 5a and Table 5b together. Table 5a is Fig.15 The curvature radius (R), spacing (D), refractive index (Nd), and Abbe number of each lens, reflector, and filter of the camera module 302 shown in a possible embodiment when focusing on a distant view. The spacing includes the thickness of the structure itself and the spacing between the structures. Table 5b is Fig.15 Aspherical coefficients of various lenses of the telephoto lens 1 in a possible embodiment are shown.

[0295] Table 5a

[0296]

[0297]

[0298] Table 5b

[0299] Face number A4 A6 A8 A10 1 4.81E-05 -8.62E-07 -3.87E-08 -2.58E-10 2 6.12E-05 -2.97E-06 -2.31E-08 -2.10E-10 3 -2.70E-04 4.12E-05 2.04E-06 -3.71E-07 4 -4.30E-04 1.38E-04 8.40E-07 -5.33E-07 5 -1.70E-03 5.39E-05 6.55E-06 -9.43E-07 6 -1.23E-03 -1.18E-04 6.59E-06 -2.32E-07 7 1.95E-03 -1.18E-04 1.38E-05 -6.35E-07 8 -8.88E-05 8.67E-05 2.58E-05 -2.07E-10 9 1.80E-04 -3.76E-04 2.82E-05 2.23E-06 10 1.99E-03 -2.64E-04 -8.56E-05 9.87E-06 11 -3.23E-03 9.87E-05 -8.95E-05 7.89E-06 12 -1.48E-03 -1.33E-04 6.26E-06 4.78E-09 13 1.08E-02 -6.96E-04 3.98E-05 -5.24E-07 14 9.01E-03 -3.56E-04 -1.04E-05 1.80E-06 15 1.18E-03 -5.73E-04 2.22E-05 -1.96E-06 16 -2.02E-03 -2.79E-05 1.30E-06 -7.69E-09

[0300] The aspherical surface of the telephoto lens 1 in Table 5a can be defined by, but not limited to, the following aspherical surface curve equation:

[0301]

[0302] Where z is the relative distance between a point on the aspherical surface and the intersection point on the optical axis; r is the vertical distance between the point on the aspherical curve and the optical axis; c is the curvature; k is the cone coefficient, which is 0; α i is the i-th order aspheric coefficient, see Table 5b.

[0303] Please refer to Table 5c, which is Fig.15The basic parameters of the camera module 302 in a possible embodiment are shown in Table 5c. In Table 5c, ImgH is the half sensor diagonal of the photosensitive element 2, Fsys is the focal length of the telephoto lens 1, f1 is the focal length of the first lens L1, f2 is the focal length of the second lens L2, F1 is the focal length of the first optical element G1, F2 is the focal length of the first lens group G21 of the second optical element G2, F3 is the focal length of the second lens group G22 of the second optical element G2, and TTL is the total optical length of the telephoto lens 1.

[0304] Table 5c

[0305] Parameters(mm) Ih Aperture value Fsys f1 f2 F1 F2 F3 TTL Numeric 5.11 2.06 20 33.3353 -29.799 146.05 7.5236 -6.734 27.0324

[0306] In this embodiment, the ratio of the focal length F1 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is F1 / Fsys=7.3; the ratio of the curvature radius L1S1R of the incident surface 11 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is L1S1R / Fsys=0.75; the ratio of the curvature radius L2S2R of the exit surface 13 of the first optical element G1 to the focal length Fsys of the telephoto lens 1 is L2S2R / Fsys=1.32.

[0307] Wherein, the ratio of the focal length f1 of the first lens L1 to the focal length Fsys of the telephoto lens 1 is f1 / Fsys=1.67; the ratio of the focal length f2 of the second lens L2 to the focal length Fsys of the telephoto lens 1 is f2 / Fsys=-1.49.

[0308] The ratio of the focal length F2 of the first lens group G21 to the focal length Fsys of the telephoto lens 1 is F2 / Fsys=0.38; the ratio of the focal length F3 of the second lens group G22 to the focal length Fsys of the telephoto lens 1 is F3 / Fsys=-0.34. The focus stroke of the first lens group G21 can be about 0.84 mm, and the focus stroke of the second lens group G22 can be about 1.66 mm. The camera module 302 can achieve macro photography, for example, 50 mm macro photography.

[0309] The ratio of the total optical length TTL of the telephoto lens 1 to the focal length Fsys of the telephoto lens 1 is TTL / Fsys=1.35.

[0310] See also Fig.17 , Fig.17 yes Fig.15 The illustrated diagram is a simulation effect diagram of the camera module 302 in a possible embodiment.

[0311] in, Fig.17It includes the axial chromatic aberration curve diagram, astigmatism field curvature diagram and distortion diagram of the telephoto lens 1. Among them, the axial chromatic aberration curve diagram includes spherical aberration curves corresponding to different bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm in the figure), the abscissa of which is the deviation value along the optical axis direction, and the ordinate is the normalized coordinate at the pupil. Fig.17 The values ​​shown in the figure are all small, and the on-axis aberration (spherical aberration, chromatic aberration, etc.) of the telephoto lens 1 is well corrected. The astigmatism field curvature diagram is used to illustrate the deviation of the convergence point of fine beams of different fields of view from the ideal imaging surface. It is the sagittal direction beam, and Y is the meridian direction beam. Its horizontal axis is the deviation value along the optical axis, and the vertical axis is the corresponding field of view. When a field of view value is too large, the image quality of the field of view is poor or there are high-level aberrations. Fig.17 The field curvature in both directions is small, and the system has a good depth of focus. The distortion diagram is used to characterize the relative deviation between the convergence point of the light beam (actual image height) in different fields of view and the ideal image height. Fig.17 All shown are within 2.5%, ensuring there is no obvious distortion in the image.

[0312] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

Claims

1. A camera module (302), characterized in that: It comprises a telephoto lens (1) and a photosensitive element (2), wherein the photosensitive element (2) is located on the image side of the telephoto lens (1); The telephoto lens (1) comprises a first optical element (G1) and a second optical element (G2); The first optical element (G1) comprises an incident surface (11), a first reflection surface (12) and an exit surface (13) arranged from the object side to the image side, the incident surface (11) is a convex surface near the optical axis, the first reflection surface (12) changes the propagation direction of the optical axis from a first direction to a second direction, the second direction intersects with the first direction, and the exit surface (13) is a concave surface near the optical axis; The second optical element (G2) is located on the image side of the first optical element (G1), and the second optical element (G2) includes at least one lens; Wherein, during the anti-shake process of the camera module (302), the first optical element (G1) rotates around the first direction and around a third direction, the photosensitive element (2) remains fixed, and the third direction intersects with the first direction and the second direction; The curvature radius L2S2R of the emission surface (13) satisfies: 10 mm ≤ L2S2R ≤ 43.5 mm or 62 mm ≤ L2S2R ≤ 300 mm, and the curvature radius L2S2R of the emission surface (13) and the focal length Fsys of the telephoto lens (1) satisfy: 0.4 ≤ L2S2R / Fsys ≤ 3.8 or 4.9 ≤ L2S2R / Fsys ≤ 10; The telephoto lens (1) can achieve macro photography, and the focusing distance of the macro photography of the telephoto lens (1) is ≤20 cm.

2. The camera module (302) according to claim 1, characterized in that: The focal length F1 of the first optical element (G1) and the focal length Fsys of the telephoto lens (1) satisfy: F1 / Fsys≥1.2; or 22.5≥F1 / Fsys≥1.

2.

3. The camera module (302) according to claim 1 or 2, characterized in that: The focal length F1 of the first optical element (G1) satisfies: F1≤380mm; or, The focal length Fsys of the telephoto lens (1) satisfies: 10 mm ≤ Fsys ≤ 40 mm.

4. The camera module (302) according to any one of claims 1 to 3, characterized in that: The curvature radius L1S1R of the incident surface (11) satisfies: 6mm≤L1S1R≤300mm or 6mm≤L1S1R≤23mm.

5. The camera module (302) according to any one of claims 1 to 4, characterized in that: The curvature radius L1S1R of the incident surface (11) and the focal length Fsys of the telephoto lens (1) satisfy the following relationship: 0.4≤L1S1R / Fsys≤6 or 0.4≤L1S1R / Fsys≤1.

4.

6. The camera module (302) according to any one of claims 1 to 5, characterized in that: The first optical element (G1) comprises a first lens (L1) and a second lens (L2), the first lens (L1) being located on the object side of the first reflecting surface (12), and the object side surface of the first lens (L1) being the incident surface (11), and the second lens (L2) being located on the image side of the first reflecting surface (12), and the image side surface of the second lens (L2) being the exit surface (13); The focal length f1 of the first lens (L1) and the focal length Fsys of the telephoto lens (1) satisfy: 0.5≤f1 / Fsys≤20; and / or, The focal length f2 of the second lens (L2) and the focal length Fsys of the telephoto lens (1) satisfy: -20≤f2 / Fsys≤0.

7. The camera module (302) according to any one of claims 1 to 6, characterized in that: The first optical element (G1) comprises a first reflective member (1a), the first reflective member (1a) comprises the first reflective surface (12), the first reflective member (1a) is a prism, and the refractive index Nd of the first reflective member (1a) satisfies: Nd≤1.

85.

8. The camera module (302) according to claim 6, characterized in that: The first optical element (G1) comprises a first reflective member (1a), the first reflective member (1a) comprises the first reflective surface (12), and the first reflective member (1a) is a prism; The image side surface of the first lens (L1) is fixed to the object side surface of the first reflector (1a), and the object side surface of the second lens (L2) is fixed to the image side surface of the first reflector (1a).

9. The camera module (302) according to claim 8, characterized in that: The first lens (L1), the first reflector (1a) and the second lens (L2) are all made of glass; the first lens (L1) is glued to the first reflector (1a), and the second lens (L2) is glued to the first reflector (1a).

10. The camera module (302) according to any one of claims 1 to 9, characterized in that: The focus distance of the telephoto lens (1) for macro photography is ≤10 cm.

11. The camera module (302) according to any one of claims 1 to 10, characterized in that: The second optical element (G2) includes a first lens group (G21) and a second lens group (G22), wherein the second lens group (G22) is located on the image side of the first lens group (G21); The first lens group (G21) has a positive optical focal length, the second lens group (G22) has a negative optical focal length, and the camera module (302) achieves macro photography by moving the first lens group (G21) or the second lens group (G22) along the optical axis.

12. The camera module (302) according to claim 11, characterized in that: The focal length F2 of the first lens group (G21) and the focal length Fsys of the telephoto lens (1) satisfy: 0.2≤F2 / Fsys≤0.3, or 0.3≤F2 / Fsys≤0.6, or 0.6≤F2 / Fsys≤1; and / or, The focal length F3 of the second lens group (G22) and the focal length Fsys of the telephoto lens (1) satisfy: -1.5≤F3 / Fsys≤-0.9, or -0.9≤F3 / Fsys≤-0.3, or -0.3≤F3 / Fsys≤-0.

2.

13. The camera module (302) according to any one of claims 1 to 9, characterized in that: The second optical element (G2) includes a first lens group (G21) and a second lens group (G22), the second lens group (G22) is located on the image side of the first lens group (G21), and the camera module (302) achieves focusing by moving the first lens group (G21) and / or the second lens group (G22) along the optical axis.

14. The camera module (302) according to claim 13, characterized in that: The focal length F2 of the first lens group (G21) and the focal length Fsys of the telephoto lens (1) satisfy: 0.2≤F2 / Fsys≤1; and / or, The focal length F3 of the second lens group (G22) and the focal length Fsys of the telephoto lens (1) satisfy: -1.5≤F3 / Fsys≤-0.

2.

15. The camera module (302) according to claim 13 or 14, characterized in that: The first optical element (G1) includes 2 to 3 lenses, the first lens group (G21) includes 3 to 5 lenses, and the second lens group (G22) includes 1 to 4 lenses.

16. The camera module (302) according to any one of claims 1 to 9, characterized in that: The camera module (302) achieves focusing by moving the second optical element (G2) along the optical axis.

17. The camera module (302) according to claim 16, characterized in that: The first optical element (G1) includes 2 to 3 lenses, and the second optical element (G2) includes 3 to 6 lenses.

18. The camera module (302) according to any one of claims 1 to 17, characterized in that: The total optical length TTL of the telephoto lens (1) and the focal length Fsys of the telephoto lens (1) satisfy the following relationship: 0.8≤TTL / Fsys≤3.

19. The camera module (302) according to any one of claims 1 to 18, characterized in that: The total optical length TTL of the telephoto lens (1) satisfies: 15 mm ≤ TTL ≤ 50 mm.

20. The camera module (302) according to any one of claims 1 to 19, characterized in that: The telephoto lens (1) further comprises a second reflecting surface (14), the second reflecting surface (14) being located on the image side of the second optical element (G2), the second reflecting surface (14) changing the propagation direction of the optical axis from the second direction to a fourth direction, the fourth direction intersecting the second direction.

21. The camera module (302) according to any one of claims 1 to 20, characterized in that: The field of view angle of the telephoto lens (1) is less than or equal to 40°.

22. The camera module (302) according to any one of claims 1 to 20, characterized in that: The half sensor diagonal ImgH of the photosensitive element (2) satisfies: 2.5mm≤ImgH≤8.16mm or 2.5mm≤ImgH≤4.0mm or 4.2mm≤ImgH≤8.16mm.

23. An electronic device, characterized in that: It comprises an image processor (60) and a camera module (302) according to any one of claims 1 to 22, wherein the image processor (60) is communicatively connected to the camera module (302), and the image processor (60) is used to obtain image data from the camera module (302) and process the image data.

Images