Optical lens, camera module and electronic device

Abstract

This application provides an optical lens, a camera module, and an electronic device, relating to the field of electronic devices. The optical lens includes a first lens group, a second lens group, and a third lens group arranged sequentially from the object side to the image side along the optical axis of the lens; the first and third lens groups are fixed lens groups with negative optical power; the second lens group is a movable lens group with positive optical power; during the zoom process from ultra-telephoto to telephoto, the second lens group moves along the optical axis from a first interval to a second interval, with the second interval located on the image side of the first interval. This allows for a reduction in the size of the electronic device while achieving high-magnification optical zoom.

Description

Technical Field

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

[0002] With the rapid development and widespread adoption of smart mobile devices, users have increasingly higher demands for the photography capabilities and image quality of mobile phones, tablets, and other electronic devices in different scenarios. Single-focal-length lenses and digital zoom methods can no longer meet consumer needs.

[0003] Camera modules in electronic devices typically include at least two optical lenses with different focal lengths to achieve high-magnification zoom. For example, a camera module might include a telephoto lens and a super-telephoto lens. When a user needs to capture distant objects or scenes and increase the magnification, an algorithm can switch from the telephoto lens to the super-telephoto lens. However, placing multiple optical lenses within an electronic device increases its size, hindering its miniaturization. Summary of the Invention

[0004] This application provides an optical lens, a camera module, and an electronic device that can reduce the size of the electronic device while achieving high-magnification optical zoom.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] In a first aspect, an optical lens is provided, comprising a first lens group, a second lens group, and a third lens group arranged sequentially from the object side to the image side along the optical axis of the optical lens; the first lens group and the third lens group are fixed lens groups with negative optical power; the second lens group is a movable lens group with positive optical power; during the zooming process of the optical lens from a super telephoto range to a telephoto range, the second lens group moves along the optical axis from a first interval to a second interval, the second interval being located on the image side of the first interval.

[0007] The optical lens provided in this application achieves zoom switching between ultra-telephoto and telephoto ranges through the movement of a lens group, which helps to reduce the size of electronic devices. Specifically, this application sets the first and third lens groups as fixed lens groups to form a stable optical path reference. The second lens group is set as a movable group, and a third lens group with the opposite optical power to the second lens group is used to correct the phase difference caused by the change in focal length, so as to achieve phase difference self-compensation within the lens and ensure the imaging quality of the optical lens.

[0008] The third lens group, with its negative optical power, can compensate for the distortion and field curvature caused by the movement of the second lens group, thus improving the image flatness of the optical lens. Therefore, by rationally allocating optical parameters such as the optical power of each lens group and the air gap between them, high-quality imaging in both ultra-telephoto and telephoto ranges can be achieved by moving only the second lens group. This reduces the number of driving components and the size of the camera module. Furthermore, compared to embodiments that require simultaneous movement of both the second and third lens groups during zooming, the optical lens provided in this application requires only a single driving component to achieve zooming between telephoto and ultra-telephoto ranges. This reduces the mechanical complexity of the optical lens, avoids the complex synchronous control required to move two lens groups, improves the reliability of the optical lens, reduces the difficulty of manufacturing and processing, and facilitates mass production.

[0009] In one possible implementation of the first aspect, the first interval includes a first position and a second position, with the second position located on the image side of the first position. During the focusing process of the optical lens switching from a distant view to a close-up view, the second lens group moves from the first position to the second position. Therefore, by reasonably setting the focusing distance of the second lens group, the optical lens can switch between distant and close-up views within the ultra-telephoto range, improving the performance of the optical lens. For example, by reasonably setting the optical parameters of the optical lens, when the second lens group moves from the first position to the second position, the focusing distance can be continuously switched from infinity to 50cm and then to 15cm, achieving ultra-telephoto macro and improving the imaging effect of the optical lens. Simultaneously, since only the second lens group needs to be moved during focusing, compared to embodiments that move multiple lens groups for focusing, the focusing distance can be shortened, reducing the size of the optical lens.

[0010] In one possible implementation of the first aspect, the second interval includes a third position and a fourth position, with the fourth position located on the object side of the third position. During the focusing process of the optical lens switching from a distant view to a close-up view, the second lens group moves from the third position to the fourth position. Therefore, by reasonably setting the focusing distance of the second lens group, the optical lens can switch between focusing on distant and close-up views within the telephoto range, improving the performance of the optical lens. For example, by reasonably setting the optical parameters of the optical lens, when the second lens group moves from the third position to the fourth position, the focusing distance can be continuously switched from infinity to a close distance of 50cm, and then to a close distance of 15cm, achieving telephoto macro and improving the imaging effect of the optical lens. Simultaneously, since only the second lens group is moved, compared to embodiments that move multiple lens groups for focusing, the focusing distance can be shortened, reducing the size of the optical lens.

[0011] In a possible implementation of the first aspect, the optical lens satisfies the following relational expression: H1<H0; wherein, H0 is the distance between the end of the first interval close to the object side along the optical axis and the end of the second interval close to the image side along the optical axis, and H1 is the distance between the first position and the second position. Thereby, it can be ensured that no change in field of view occurs when the optical lens switches the focusing distance in the ultra-long focal length segment. That is, when the optical lens switches from a distant view to a close view in the ultra-long focal length segment, the optical lens will not switch from the ultra-long focal length segment to the long focal length segment. Thereby, large changes in the field of view angle or magnification of the optical lens during focusing can be avoided, the continuity of focusing is improved, and the use performance of the optical lens is enhanced.

[0012] In a possible implementation of the first aspect, the optical lens satisfies the following relational expression: H2<H0; wherein, H0 is the distance between the end of the first interval close to the object side along the optical axis and the end of the second interval close to the image side along the optical axis, and H2 is the distance between the third position and the fourth position. Thereby, it can be ensured that no change in field of view occurs when the optical lens switches the focusing distance in the long focal length segment. That is, when the optical lens switches from a distant view to a close view in the long focal length segment, the optical lens will not switch from the long focal length segment to the ultra-long focal length segment. Thereby, large changes in the field of view angle or magnification of the optical lens during focusing can be avoided, the continuity of focusing is improved, and the use performance of the optical lens is enhanced.

[0013] In a possible implementation of the first aspect, the optical lens satisfies the following relational expression: H1+H2≤H0; wherein, H0 is the distance between the end of the first interval close to the object side along the optical axis and the end of the second interval close to the image side along the optical axis, H1 is the distance between the first position and the second position, and H2 is the distance between the third position and the fourth position. Thereby, it can be ensured that no change in field of view occurs when the optical lens switches the focusing distance in the ultra-long focal length segment and the long focal length segment. That is, when the optical lens switches from a distant view to a close view, or from a close view to a distant view in the ultra-long focal length segment and the long focal length segment, the optical lens will not switch between the ultra-long focal length segment and the long focal length segment. Thereby, large changes in the field of view angle or magnification of the optical lens during focusing can be avoided, the continuity of focusing is improved, and the use performance of the optical lens is enhanced.

[0014] In a possible implementation of the first aspect, the optical lens satisfies the following relational expression: 7.5mm≤H0≤10mm; wherein, H0 is the moving distance of the second lens group when moving between the first interval and the second interval. By controlling H0 to be greater than or equal to the lower limit value of 7.5mm, it can be ensured that the optical lens has sufficient zoom stroke to switch between the long focal length segment and the ultra-long focal length segment. Controlling H0 to be less than or equal to the upper limit value of 10mm can control the overall length of the optical lens, which is beneficial to the miniaturization of the lens.

[0015] In one possible implementation of the first aspect, the combined focal length of the first and second lens groups is positive. When the second lens group moves along the optical axis toward the image side, the combined focal length of the first and second lens groups decreases. Similarly, the combined focal length of the second and third lens groups is positive. When the second lens group moves along the optical axis toward the image side, the combined focal length of the second and third lens groups increases. Therefore, by controlling the combined focal length of the first and second lens groups, the positive and negative values ​​of the combined focal length of the second and third lens groups, and the direction of change of each combined focal length when the optical lens switches from a super-telephoto to a telephoto lens, it is beneficial to improve the stability of the zoom process, suppress phase aberration problems caused by the zoom travel, and improve image quality.

[0016] In one possible implementation of the first aspect, the first lens group includes at least one lens with positive optical power and one lens with negative optical power. The combination of the positive and negative optical power lenses forms a chromatic aberration compensation mechanism, which helps improve the imaging quality of the optical lens.

[0017] In one possible implementation of the first aspect, the second lens group includes at least two lenses, at least one of which has positive optical power. The combination of two lenses with positive optical power creates a superposition effect of optical power, enabling a greater range of focal length changes over a finite distance, thereby increasing the zoom range of the optical lens.

[0018] In one possible implementation of the first aspect, the third lens group includes at least two lenses, at least one of which has negative optical power. Constructing a reverse curvature optical path using a lens with negative optical power facilitates the correction of distortions and field curvature caused by the movement of the second lens group, ensuring the flatness of the imaging surface.

[0019] In one possible implementation of the first aspect, the first lens group, the second lens group, and the third lens group each include at least two lenses; the first lens group includes at least one lens with positive optical power and one lens with negative optical power; the second lens group includes at least one lens with positive optical power; and the third lens group includes at least one lens with negative optical power. Thus, the lenses of the optical lens are divided into multiple groups for achieving different functions. By rationally configuring the positive and negative optical powers of the multiple lenses of the optical lens, it is beneficial to adjust the refraction path of light, balance aberrations, correct field curvature and distortion, and improve the imaging quality of the optical lens while ensuring the zoom range of the optical lens.

[0020] In one possible implementation of the first aspect, the second lens group further includes an aperture stop, the center line of which coincides with the optical axis of the optical lens. The aperture of the aperture stop remains unchanged as the second lens group moves along the optical axis. Thus, by placing the aperture stop within the second lens group and ensuring its aperture remains constant during zooming and focusing, the aperture stop can be adjusted to change the aperture value as the second lens group moves, eliminating the need for a separate aperture stop driving mechanism and reducing the complexity and power consumption of the camera module.

[0021] In one possible implementation of the first aspect, d1 is the air gap between the first and second lens groups, and d2 is the air gap between the second and third lens groups. When the second lens group moves along the optical axis, the sum of d1 and d2 remains constant. With the first lens group G1 and the third lens group G3 fixed, by keeping the sum of d1 and d2 constant, the stability of the optical path can be improved, ensuring that the total length of the optical lens remains constant during zooming and focusing, and enhancing the stability of the image plane.

[0022] In one possible implementation of the first aspect, the optical lens satisfies the following relationship: 2.4 ≤ Fno1 ≤ 3.5; where Fno1 is the aperture value of the optical lens at the telephoto end. By controlling Fno1 to be greater than or equal to the lower limit of 2.4 and less than or equal to the upper limit of 3.5, it is possible to ensure that the optical lens has sufficient light intake at the telephoto end, ensuring normal exposure of the image, while also controlling depth of field and chromatic aberration, thereby improving the image quality of the optical lens.

[0023] In one possible implementation of the first aspect, the optical lens satisfies the following relationship: 3.5 ≤ Fno2 ≤ 4.8; where Fno2 is the aperture value of the optical lens at the super-telephoto range. By controlling Fno2 to be greater than or equal to the lower limit of 3.5 and less than or equal to the upper limit of 4.8, it is possible to ensure that the optical lens has sufficient light intake at the super-telephoto range, ensuring normal exposure of the image, while also controlling depth of field and chromatic aberration. This ensures that the optical lens can achieve high-quality imaging at both the telephoto and super-telephoto ranges, thereby improving the image quality of the optical lens.

[0024] In one possible implementation of the first aspect, the optical lens satisfies the following relationship: 0.95 ≤ TTL / FT ≤ 1.9; where TTL is the total optical length of the optical lens along its own optical axis, and FT is the total effective focal length of the optical lens in the ultra-telephoto range. Controlling TTL / FT to be greater than or equal to the lower limit of 0.95 helps ensure the zoom range of the optical lens in both ultra-telephoto and telephoto ranges, thus improving the optical performance of the optical lens. Controlling TTL / FT to be less than or equal to the upper limit of 1.9 helps control the length of the optical lens, enabling miniaturization of the optical lens.

[0025] In one possible implementation of the first aspect, the optical lens satisfies the following relationship: 4.8 ≤ TTL / (IMH×2) ≤ 6.5; where TTL is the total optical length of the optical lens along its own optical axis, IMH is the half-image height corresponding to the optical lens, and twice IMH is the diagonal size of the image sensor corresponding to the optical lens. By controlling TTL / (IMH×2) to be greater than or equal to the lower limit of 4.8, it is beneficial to control the length of the optical lens and achieve miniaturization of the optical lens. By controlling TTL / (IMH×2) to be less than or equal to the upper limit of 6.5, it is beneficial to achieve large target surface imaging with the optical lens and improve the imaging quality of the optical lens.

[0026] In one possible implementation of the first aspect, the optical lens satisfies the following relationship: 2.0 ≤ FT / FW ≤ 2.6;

[0027] Where FT represents the total effective focal length of the optical lens in the ultra-telephoto range, and FW represents the total effective focal length of the optical lens in the telephoto range. Controlling FT / FW to be greater than or equal to the lower limit of 2.0 facilitates a longer zoom range, allowing the optical lens to have a longer focal length in the ultra-telephoto range, thus improving the resolution of the optical lens in the telephoto range. Controlling FT / FW to be less than or equal to the upper limit of 2.6 helps control the length of the optical lens, enabling miniaturization.

[0028] In one possible implementation of the first aspect, the optical lens satisfies the following relationship: 1.5 ≤ |FT / LEF1| ≤ 2.0; where FT is the total effective focal length of the optical lens in the super-telephoto range; and LEF1 is the combined focal length of the first lens group. This facilitates the rational allocation of the focal lengths of the first, second, and third lens groups, thereby improving the imaging quality of the optical lens.

[0029] In one possible implementation of the first aspect, the optical lens satisfies the following relationship: 1.2 ≤ |LEF1 / LEF2| ≤ 2.0; where LEF1 is the combined focal length of the first lens group; and LEF2 is the combined focal length of the second lens group. This facilitates a reasonable distribution of the optical power of the first, second, and third lens groups, allowing for adjustment of the optical path. It effectively prevents light from outside the field of view from reaching the imaging plane and thus damaging imaging performance, thereby improving the imaging quality of the optical lens.

[0030] In one possible implementation of the first aspect, the optical lens further includes a first refractive element located on the object side of the first lens group, which is used to deflect light to the optical lens. This ensures that the optical axis of the optical lens is not parallel to the thickness direction of the electronic device, which helps to reduce the size of the optical lens in the thickness direction of the electronic device, thus reducing the thickness of the electronic device and allowing the optical lens to be used in periscope camera modules.

[0031] In one possible implementation of the first aspect, the optical lens further includes a second refracting element located on the image side of the third lens group. The second refracting element is used to deflect light to the image sensor. This allows the image plane of the optical lens 41 to be less perpendicular to the optical axis, which is beneficial for achieving large-area imaging and improving the image quality of the optical lens.

[0032] Secondly, this application provides a camera module, including: an image sensor and an optical lens provided in any of the first aspects, wherein the image sensor is disposed on the image side of the optical lens.

[0033] Thirdly, this application provides an electronic device, including: a housing and a camera module provided in the second aspect; the housing has a light-transmitting opening; the camera module is disposed inside the housing, and the light-incident surface of the camera module faces the light-transmitting opening.

[0034] Since the camera module of the second aspect and the electronic device of the third aspect provided in the embodiments of this application include the optical lens of any technical solution of the first aspect, the camera module of the second aspect and the electronic device of the third aspect can solve the same technical problem corresponding to any technical solution of the first aspect and achieve the same technical effect, which will not be elaborated here. Attached Figure Description

[0035] Figure 1 Perspective views of electronic devices provided in some embodiments of this application;

[0036] Figure 2 for Figure 1 An exploded view of the electronic device shown;

[0037] Figure 3 This is a schematic diagram of the structure of a camera module provided in some embodiments of this application;

[0038] Figure 4 Schematic diagram of an electronic device provided for some embodiments of this application;

[0039] Figure 5 This is a schematic diagram of the structure of an optical lens provided in some embodiments of this application;

[0040] Figure 6 This is a schematic diagram of the structure of an optical lens provided in some other embodiments of this application;

[0041] Figure 7 A schematic diagram illustrating the focusing process of an optical lens at an ultra-telephoto focal length, provided for some embodiments of this application;

[0042] Figure 8A schematic diagram illustrating the focusing process of an optical lens at a telephoto range, provided for some embodiments of this application;

[0043] Figure 9 This is a schematic diagram of the structure of an optical lens provided in some embodiments of this application;

[0044] Figure 10 This application provides schematic diagrams of the structure of optical lenses in some of its embodiments.

[0045] Figure 11 This is a schematic diagram of the structure of an optical lens provided in some other embodiments of this application;

[0046] Figure 12 This is a schematic diagram of the simulated structure of the optical lens provided in Example 1;

[0047] Figure 13 This is a graph showing the astigmatism of light after it passes through the optical lens in Example 1.

[0048] Figure 14 This is a distortion curve of light after passing through the optical lens in Example 1;

[0049] Figure 15 This is a schematic diagram of the simulation structure of the optical lens provided in Example 2;

[0050] Figure 16 The image scattering curve is shown after light passes through the optical lens in Example 2.

[0051] Figure 17 The distortion curve is shown after light passes through the optical lens in Example 2.

[0052] Figure 18 This is a schematic diagram of the simulated structure of the optical lens provided in Example 3;

[0053] Figure 19 The image astigmatism curve is shown after light passes through the optical lens in Example 3.

[0054] Figure 20 The distortion curve is shown after light passes through the optical lens in Example 3.

[0055] Figure 21 A schematic diagram of the simulated structure of the optical lens provided in Example 4;

[0056] Figure 22 The image scattering curve is shown after light passes through the optical lens in Example 4.

[0057] Figure 23 The distortion curve is shown after light passes through the optical lens in Example 4.

[0058] Figure 24This is a schematic diagram of the simulated structure of the optical lens provided in Example 5;

[0059] Figure 25 The image astigmatism curve is shown after light passes through the optical lens in Example 5.

[0060] Figure 26 This is a distortion curve of light after passing through the optical lens in Example 5. Detailed Implementation

[0061] In the embodiments of this application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0062] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0063] In the description of embodiments of this application, the term "comprising" or any other variations thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0064] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, within ±10°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, within ±10°. “equal” includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0065] For ease of understanding, the technical terms used in this application will be explained and described below.

[0066] The optical axis is the direction in which light rays travel through an optical system, and is referenced to the principal ray at the center of the field of view. For symmetrical transmission systems, it generally coincides with the rotation center line of the optical system.

[0067] Focal length, also known as focal length, is a measure of the convergence or divergence of light in an optical system. It refers to the perpendicular distance from the optical center of a lens or lens group to the focal plane when a distant object is focused into a sharp image. From a practical perspective, it can be understood as the distance from the center of the lens to the film plane. For prime lenses, the position of their optical center remains constant; for zoom lenses, changes in the optical center result in changes in the focal length.

[0068] The object side and the object-side surface are defined by the lens / lens group. The side where the subject is located is the object side, and the surface of the lens / lens group that is closer to the object side can be called the object-side surface.

[0069] Image side and image-side side are defined by the lens / lens group; the side where the image of the subject is located is the image side, and the surface of the lens / lens group closest to the image side can be called the image-side side. Specifically, along the optical axis of the lens, the side where the image sensor is located is the image side of the lens, and the opposite side is the object side.

[0070] Aperture, also known as aperture stop, is a device used to control the amount of light passing through the lens and entering the camera's sensor. It is usually located inside the lens. The aperture number (F#) is a relative value obtained by dividing the lens's focal length by its aperture diameter (the reciprocal of the relative aperture). The smaller the F# value, the more light enters the lens in the same unit of time, allowing the lens to perform well in low-light conditions. The larger the F# value, the shallower the depth of field, resulting in a blurred background in the photograph.

[0071] Optical power is equal to the difference between the convergence of the image-side beam and the convergence of the object-side beam; it characterizes the ability of an optical system to deflect light rays. When the refractive index of air is approximately assumed to be 1, optical power is generally expressed as the reciprocal of the image-side focal length.

[0072] Optical power characterizes the ability of an optical system to refract an incident parallel beam of light. The higher the optical power value, the more pronounced the refraction of the parallel beam. When the optical power is greater than 0, the refraction is converging; when the optical power is less than 0, the refraction is diverging; when the optical power is equal to 0, it is plane refraction, in which case the axial parallel beam remains axially parallel after refraction, and no refraction occurs.

[0073] Total track length (TTL) refers to the total length from the center of the object side of the first lens to the center of the image side of the last lens, and is the main factor that determines the height of the camera module.

[0074] Effective focal length (EFL): The distance between the rear principal plane of a lens or lens group and the image plane. For thin lenses, the focal length is the distance from the center of the lens to the image plane.

[0075] Abbe number: The Abbe number of a lens is its dispersion coefficient, which refers to the ratio of the differences in the refractive index of the lens at different wavelengths. It is used to characterize the degree of dispersion of the lens. Generally, the higher the refractive index of the medium, the more severe the dispersion, and the smaller the Abbe number. Conversely, the lower the refractive index of the medium, the less severe the dispersion, and the larger the Abbe number.

[0076] The field of view (FOV) in optical instruments is the angle between the two edges of the lens, representing the maximum range through which the image of the target object can pass through the lens. The size of the FOV determines the field of view of the optical instrument; a larger FOV results in a wider field of view but a lower optical magnification.

[0077] Aberrations refer to the discrepancies between the results obtained from non-paraxial ray tracing and paraxial ray tracing in a lens, deviating from the ideal state of Gaussian optics (first-order approximation theory or paraxial rays). Aberrations are divided into two main categories: chromatic aberration and monochromatic aberration. Chromatic aberration occurs because the refractive index of the lens material is a function of wavelength. Different wavelengths of light passing through the lens cause dispersion due to the different refractive indices. Dispersion where the refractive index decreases with increasing wavelength is called normal dispersion, while dispersion where the refractive index increases with increasing wavelength is called negative dispersion (or anomalous dispersion). Monochromatic aberration refers to aberrations that occur even with highly monochromatic light. Based on the effect, monochromatic aberrations are divided into two categories: those that "blur the image" and those that "distort the image." The former includes spherical aberration and astigmatism, while the latter includes field curvature and distortion. Chromatic aberration includes axial chromatic aberration and off-axis chromatic aberration. Axial chromatic aberration refers to the aberration along the optical axis. Because the lens has different refractive indices for different wavelengths of light, different colors of light have different focal points.

[0078] Field curvature, also known as image field bending, is a phenomenon in optical systems where the intersection of the entire light beam does not coincide with the ideal image point. Although a clear image point can be obtained at each specific point, the entire image plane is a curved surface. This makes it impossible to see the entire image plane clearly during microscopic examination, causing difficulties for observation and photography.

[0079] Distortion, also known as distortion, is the degree of distortion in the image formed by an optical system relative to the object itself. Distortion occurs due to the spherical aberration of the aperture; the height of the intersection point between the principal ray from different fields of view and the Gaussian image plane is not equal to the ideal image height, and this difference is the distortion. Therefore, distortion only changes the imaging position of an off-axis object point on the ideal plane, causing distortion in the image shape, but it does not affect the image's sharpness.

[0080] The incident light side and the exit light side are the areas through which the imaging rays pass. The imaging rays include the chief ray and the marginal ray. The incident light side is the side facing the object, and the exit light side is the side facing the image. The light rays are transmitted from the incident light side to the exit light side.

[0081] Object plane: The object is simplified to a point on the optical axis (object distance point), and a plane passing through this point and perpendicular to the optical axis.

[0082] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0083] This application provides an electronic device. Specifically, the electronic device can be a portable electronic device or other types of electronic devices. For example, the electronic device can be a mobile phone, tablet personal computer, laptop computer, personal digital assistant (PDA), monitor, camera, personal computer, laptop computer, wearable device, etc. For ease of explanation, the following description uses a mobile phone as an example.

[0084] Please see Figure 1 , Figure 2 , Figure 1 A perspective view of an electronic device 100 provided in some embodiments of this application; Figure 2 for Figure 1 The diagram shows an exploded view of the electronic device 100. In this embodiment, the electronic device 100 is a tablet phone. In some embodiments, the electronic device 100 includes a display module 10, a housing 20, a circuit board 30, and a camera module 40.

[0085] For ease of description below, an XYZ coordinate system is established, defining the width direction of the electronic device 100 as the X-axis, the length direction as the Y-axis, and the thickness direction as the Z-axis. Therefore, this application does not impose any special limitations on this aspect. Figure 1 and Figure 2 In this embodiment, the electronic device 100 is a rectangular flat plate. It is understood that in some other embodiments, the shape of the electronic device 100 may also be a square flat plate, a circular flat plate, an elliptical flat plate, etc.

[0086] It should be noted that, Figure 1 and Figure 2 The electronic device 10 is shown only schematically, and the actual shape, size, location, and construction of these components are not subject to change. Figure 1 and Figure 2 Restrictions.

[0087] Display module 10 is used to display images, videos, etc. Please refer to [link / reference]. Figure 2The display module 10 includes a light-transmitting cover plate 11 and a display screen 12. The light-transmitting cover plate 11 and the display screen 12 are stacked together. The light-transmitting cover plate 11 mainly serves to protect the display screen 12 from dust. The display screen 12 can be a flexible display screen or a rigid display screen. For example, the display screen 12 can be an organic light-emitting diode (OLED) display screen, a liquid crystal display (LCD) display screen, etc., and this application does not limit this.

[0088] The housing 20 is used to protect the electronic components inside the electronic device 100. The housing 20 may include a rear cover 21 and a frame 22. The rear cover 21 is located on the side of the display screen 12 away from the light-transmitting cover plate 11 and is stacked with the light-transmitting cover plate 11 and the display screen 12. The frame 22 is located between the light-transmitting cover plate 11 and the rear cover 21. The frame 22 is fixed to the rear cover 21. The light-transmitting cover plate 11 is fixed to the frame 22, so that the light-transmitting cover plate 11, the rear cover 21, and the frame 22 form a receiving cavity inside the electronic device 100. The aforementioned display screen 12, circuit board 30, and camera module 40 are all disposed within this internal receiving cavity.

[0089] In some embodiments, the housing 20 may further include a middle plate 23, which is disposed within the aforementioned receiving cavity and located on the side of the display screen 12 away from the light-transmitting cover 11. The middle plate 23 is fixedly connected to the frame 22 to form the middle frame of the electronic device 100. Exemplarily, the middle plate 23 and the frame 22 can be fixedly connected by adhesive, threaded connection, welding, snap-fit, or other methods; alternatively, the middle plate 23 and the frame 22 can be an integrally formed structure, i.e., the middle plate 23 and the frame 22 form a single structural component. The middle plate 23 divides the aforementioned receiving cavity into two independent spaces. One space is located between the light-transmitting cover 11 and the middle plate 23, and the display screen 12 is located within this space. The other space is located between the middle plate 23 and the rear cover 21, and the circuit board 30 is located within this space.

[0090] The circuit board 30 (also known as the motherboard of the electronic device 100) is used to house the electronic components inside the electronic device 100 and to realize the electrical connection between the electronic components. The circuit board 30 can be fixed to the middle plate 23 by means of adhesive, threaded connection, soldering, snap-fit, etc. This application does not make any special limitation on the fixing method of the circuit board 30.

[0091] Electronic components are used to implement various functions of electronic device 100. For example, electronic components may include camera module 40, control chip (e.g., system on chip, SOC), graphics processing unit (GPU), universal flash storage (UFS), flash module, and capacitors, resistors, inductors, etc.

[0092] The camera module 40 is used to capture video or images. The camera module 40 can be electrically connected to the circuit board 30 via connectors (e.g., FPC board, flexible printed circuit board) or metal wires.

[0093] The camera module 40 has a light-incident surface, which can be the light-incident surface (i.e., the object side) of the lens inside the camera module 40. The light-incident surface of the camera module 40 faces the rear cover 21, and the rear cover 21 has a light-transmitting opening 211. The camera module 40 is disposed at the light-transmitting opening 211, and the light-incident surface of the camera module 40 faces the light-transmitting opening 211. In some embodiments, the electronic device 100 may also include a camera decorative cover 50, which is fixed at the light-transmitting opening 211. The camera decorative cover 50 has a light-transmitting window, and the light-incident surface of the camera module 40 is opposite to the light-transmitting window, so that external light can pass through the light-transmitting window 51 and enter the camera module 40, thereby enabling the electronic device 10 to capture videos or pictures.

[0094] Understandable, Figure 1 and Figure 2 The camera module 40 is used as the rear camera of the electronic device 100, that is, the light-incident surface of the camera module 40 is disposed on the rear cover 21. In other embodiments, the camera module 40 can also be the front camera of the electronic device 100, that is, the light-incident surface of the camera module is disposed on the display module 10, and this application does not limit it.

[0095] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of a camera module 40 provided in some embodiments of this application. The camera module 40 may include an optical lens 41 and an imaging assembly 42. The optical lens 41 may include multiple different lens groups to enable the optical lens 41 to perform different functions. The imaging assembly 42 may be an image sensor 422, and the surface of the image sensor 422 facing the optical lens 41 is the imaging surface 422a.

[0096] In some embodiments, such as Figure 3As shown, the imaging assembly 42 also includes a filter 421, which is disposed between the optical lens 41 and the image sensor 422. Exemplarily, the filter 421 is used to filter out unwanted wavelengths in the light, preventing the image sensor 422 from producing false colors or ripples, thereby improving effective resolution and color reproduction.

[0097] In some embodiments, the camera module 40 further includes a driving component ( Figure 3 (Not shown), for example, the driving component can be a voice coil motor (VCM). The driving component is connected to the optical lens 41. The driving component can drive the lens in the optical lens 41 to move along the optical axis so that the light emitted from the optical lens 41 is focused on the imaging surface 422a to achieve focusing and form a clear image on the imaging surface 422a.

[0098] The camera module 40 can be configured as either upright or periscope. When the camera module 40 is an upright camera module, the optical axis of the camera module 40 is perpendicular to the thickness direction of the electronic device 100 (i.e.,...). Figure 1 , Figure 2 and Figure 3 The optical axis 410 of the optical lens 41 is parallel to the thickness direction of the electronic device 100. When the camera module 40 is a periscope camera module, the optical axis 410 of the optical lens 41 forms a certain angle with the thickness direction of the electronic device 100. For example, the optical axis 410 of the optical lens 41 can be perpendicular to the thickness direction of the electronic device 100.

[0099] To capture distant objects or scenes more clearly, in some embodiments, the camera module 40 can be a telephoto camera module, meaning its optical lens 41 is a telephoto lens with a focal length and optical magnification greater than that of a standard lens. Therefore, the camera module 40 can capture images of distant objects or scenes, broadening the shooting scenarios of the electronic device 100 and improving the user experience.

[0100] As users demand higher and higher levels of photography and image quality from electronic devices 100, such as wider zoom range and higher image quality, this places higher demands on the design of the camera module 40 in electronic devices 100. A single telephoto lens with a single focal length can no longer meet the needs of users.

[0101] In some embodiments, please refer to Figure 4 , Figure 4The diagram below illustrates an electronic device 100 provided in some embodiments of this application. The camera module 40 of the electronic device 100 includes multiple optical lenses 41, such as at least one telephoto lens and one super-telephoto lens. The super-telephoto lens has a longer focal length and higher magnification than the telephoto lens, enabling it to capture objects or scenes at greater distances. Thus, when a user needs to capture objects or scenes at greater distances or increase the magnification, an algorithm can switch from the telephoto lens to the super-telephoto lens. Conversely, when a user needs to reduce the magnification, the algorithm can also switch from the super-telephoto lens to the super-telephoto lens. However, this zoom mode is essentially a "jump" zoom, meaning it achieves continuous zoom by using multiple lenses with different focal lengths and combining them with an algorithm, rather than true optical continuous zoom. During zooming, the image sharpness of the disconnected portions outside the focal length range of the multiple lenses decreases compared to optical continuous zoom. Meanwhile, due to differences in optical quality and imaging capabilities between different lenses, the image quality may change significantly when switching lenses in this zoom mode, affecting the user's shooting experience. Furthermore, the simultaneous placement of multiple optical lenses 41 within the electronic device 100 increases its size, hindering its miniaturization.

[0102] Therefore, in some embodiments, please refer to Figure 5 , Figure 5 The following is a schematic diagram of the structure of an optical lens 41 provided in some other embodiments of this application. The optical lens 41 includes a first lens group G1, a second lens group G2 and a third lens group G3 arranged sequentially from the object side to the image side along the optical axis 410. The first lens group G1 is a fixed lens group, and the second lens group G2 and the third lens group G3 are movable groups.

[0103] During the zooming process of the camera module 40, the driving component drives the second lens group G2 and the third lens group G3 to move along the optical axis 410 to adjust the overall focal length of the optical lens 41. Specifically, the second lens group G2 is used to adjust the overall focal length of the optical lens 41, while the third lens group G3 is used to compensate for the image plane position, correcting field curvature and aberrations caused by the change in focal length, thereby improving the imaging effect. Thus, by reasonably setting the specific parameters of the optical lens 41, it is possible to switch between telephoto and ultra-telephoto focal lengths.

[0104] in, Figure 5 (a) is a schematic diagram of the optical lens 41 in the telephoto range. Figure 5 (b) is a schematic diagram of the structure of the optical lens 41 in the super telephoto range.

[0105] Figure 5The provided optical lens 41 enables switching between telephoto and super-telephoto focal lengths through a single lens, reducing the number of optical lenses 41 and thus helping to reduce the size of the electronic device 100. However, both the second lens group G2 and the third lens group G3 are movable lens groups, which means that the driving component needs to drive the second lens group G2 and the third lens group G3 separately, or use two independent driving components to drive the displacement of the second lens group G2 and the third lens group G3, so that the second lens group G2 and the third lens group G3 can be perfectly focused at each focal length. This type of camera module 40 has high requirements for the stroke and control precision of the driving component, making the structure of the camera module 40 more complex, requiring high installation precision, and resulting in high manufacturing costs. At the same time, the drive motor of this type of camera module 40 still occupies a large space, which is not conducive to reducing the size of the electronic device 100.

[0106] Therefore, this application provides an optical lens 41. By reasonably configuring the optical power of the first lens group G1, the second lens group G2 and the third lens group G3, the third lens group G3 can be set as a fixed lens group, so that the overall focal length of the optical lens 41 can be adjusted by only moving the second lens group G2, so that the optical lens 41 can switch between telephoto and super telephoto.

[0107] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of an optical lens 41 provided in other embodiments of this application, wherein, Figure 6 (a) is a schematic diagram of the optical lens 41 in the telephoto range. Figure 6 (b) is a schematic diagram of the optical lens 41 in the ultra-telephoto range. This optical lens 41 is used in the aforementioned camera module 40. The optical lens 41 includes a first lens group G1, a second lens group G2, and a third lens group G3 arranged sequentially from the object side to the image side along the optical axis 410 of the optical lens 41. The first lens group G1 and the third lens group G3 are fixed lens groups with negative optical power, and the second lens group G2 is a movable lens group with positive optical power.

[0108] During the zooming process of optical lens 41 from super telephoto to telephoto, the second lens group G2 moves along the optical axis 410 from the first interval 410A to the second interval 410B, with the second interval 410B located on the image side of the first interval 410A. Conversely, during the zooming process of optical lens 41 from telephoto to super telephoto, the second lens group G2 moves along the optical axis 410 from the second interval 410B to the first interval 410A. In other words, by moving the second lens group G2 along the optical axis 410 towards the image side, optical lens 41 can switch from super telephoto to telephoto.

[0109] in, Figure 6 (a) in the middle is Figure 6The provided schematic diagram shows the structure of the optical lens 41 in the ultra-telephoto range. Figure 6 (b) in the middle is Figure 6 A schematic diagram of the structure of the provided optical lens 41 in the telephoto range.

[0110] This application does not limit the number of lenses included in the first lens group G1, the second lens group G2, and the third lens group G3, and these numbers can be set according to actual conditions. Figure 6 The example provided is that the first lens group G1, the second lens group G2, and the third lens group G3 each consist of two lenses, but this does not constitute a limitation of this application.

[0111] Similarly, the actual concavity / convexity of each lens in the optical lens 41, its optical power, and the spacing between the lenses can all be set according to the actual situation. Figure 6 The examples provided do not constitute a limitation of this application.

[0112] This application does not limit the magnification of the optical lens 41 relative to the standard lens in the electronic device 100 in the telephoto and super-telephoto ranges, as long as the focal length and magnification of the optical lens 41 in the super-telephoto range are greater than the focal length of the optical lens 41 in the telephoto range. For example, the optical lens 41 can achieve a magnification of 5.5-10 times compared to the standard lens in the electronic device 100 in the super-telephoto range, and a magnification of 2.5-3.5 times compared to the standard lens in the electronic device 100 in the telephoto range. Specifically, when the equivalent focal length of the standard lens in the electronic device 100 is 23-25mm, the equivalent focal length of the optical lens 41 in the telephoto range can be 60-87.5mm, and the equivalent focal length of the optical lens 41 in the super-telephoto range can be 110-250mm.

[0113] The optical lens 41 provided in this application achieves zoom switching between ultra-telephoto and telephoto ranges through the movement of a lens group, which helps to reduce the size of the electronic device 100. Specifically, this application sets the first lens group G1 and the third lens group G3 as fixed lens groups to form a stable optical path reference. The second lens group G2 is set as a movable group, and the third lens group G3, which has the opposite optical power to the second lens group G2, is used to correct the phase difference caused by the change in focal length, so as to achieve phase difference self-compensation within the lens and ensure the imaging quality of the optical lens 41.

[0114] The third lens group G3, with its negative optical power, can compensate for the distortion and field curvature caused by the movement of the second lens group G2, thereby improving the image flatness of the optical lens 41. Thus, by rationally allocating optical parameters such as the optical power of each lens group and the air gap between them, high-quality imaging in both ultra-telephoto and telephoto ranges can be achieved by moving only the second lens group G2. This reduces the number of driving components and the size of the camera module 40. Furthermore, compared to embodiments where both the second and third lens groups G2 and G3 need to be moved simultaneously during zooming, the optical lens 41 provided in this application requires only a single driving component to achieve zooming between telephoto and ultra-telephoto ranges. This reduces the mechanical complexity of the optical lens 41, avoids the complex synchronous control required to move two lens groups, improves the reliability of the optical lens 41, reduces the difficulty of manufacturing and processing the optical lens 41, and facilitates mass production.

[0115] In some embodiments, the first lens group G1 includes at least one lens with positive optical power and one lens with negative optical power. The combination of the lens with positive optical power and the lens with negative optical power forms a chromatic aberration compensation mechanism, which is beneficial to improving the imaging quality of the optical lens 41.

[0116] In some embodiments, the second lens group G2 includes at least two lenses, wherein at least one lens has positive optical power. The combination of two lenses with positive optical power creates a superposition effect of optical power, enabling a greater range of focal length changes over a limited distance, thereby increasing the zoom range of the optical lens 41.

[0117] In some embodiments, the third lens group G3 includes at least two lenses, at least one of which has negative optical power. Constructing a reverse curvature optical path using a lens with negative optical power is beneficial for correcting distortions and field curvature caused by the movement of the second lens group G2, thus ensuring the flatness of the imaging surface 422a.

[0118] In some embodiments, the first lens group G1, the second lens group G2, and the third lens group G3 each include at least two lenses; the first lens group G1 includes at least one lens with positive optical power and one lens with negative optical power; the second lens group G2 includes at least one lens with positive optical power; and the third lens group G3 includes at least one lens with negative optical power. Thus, the lenses of the optical lens 41 are divided into multiple lens groups for achieving different functions. By rationally configuring the positive and negative optical powers of the multiple lenses of the optical lens 41, it is beneficial to adjust the refraction path of light, balance aberrations, correct field curvature and distortion, and improve the imaging quality of the optical lens 41 while ensuring the zoom range of the optical lens 41.

[0119] This application does not limit the movement of the second lens group G2 along the optical axis 410. When the second lens group G2 includes multiple lenses, this application also does not limit the movement of all lenses in the second lens group G2. For example, when the optical lens 41 switches between a telephoto lens and an ultra-telephoto lens, all lenses of the second lens group G2 can be treated as a whole, and the driving module can drive the second lens group G2 as a whole to move along the optical axis 410. This simplifies the structural complexity of the driving module, making the fabrication and installation of the camera module simpler.

[0120] In some embodiments, the combined focal length of the first lens group G1 and the second lens group G2 is a positive value. When the second lens group G2 moves towards the image side along the optical axis 410, the combined focal length of the first lens group G1 and the second lens group G2 decreases. That is, when the optical lens 41 switches from the super telephoto range to the telephoto range, the combined focal length of the first lens group G1 and the second lens group G2 decreases.

[0121] The combined focal length of the second lens group G2 and the third lens group G3 is a positive value. When the second lens group G2 moves towards the image side along the optical axis 410, the combined focal length of the second lens group G2 and the third lens group G3 increases. That is, when the optical lens 41 switches from the super telephoto range to the telephoto range, the combined focal length of the second lens group G2 and the third lens group G3 increases.

[0122] Therefore, by controlling the combined focal length of the first lens group G1 and the second lens group G2, as well as the positive and negative values ​​of the combined focal length of the second lens group G2 and the third lens group G3, and the direction of change of each combined focal length when the optical lens 41 switches from the super telephoto range to the telephoto range, it is beneficial to improve the stability of the zoom process, suppress the phase difference problem caused by the zoom stroke, and improve the image quality.

[0123] In some embodiments, when the optical lens 41 is within the ultra-telephoto range, the focus range can be switched by moving the second lens group G2. For example, please refer to... Figure 7 , Figure 7 This is a schematic diagram illustrating the focusing process of an optical lens 41 in an ultra-telephoto range according to some embodiments of this application. The first interval 410A includes a first position M1 and a second position M2. The second position M2 is located on the image side of the first position M1. During the focusing process of the optical lens 41 switching from a distant view to a close-up view, the second lens group G2 moves from the first position M1 to the second position M2. That is, when the optical lens 41 focuses on a distant view within the ultra-telephoto range, the second lens group G2 moves from the first position M1 along the optical axis 410 towards the image side to the second position M2 to switch the focusing distance to a close-up view. When the optical lens 41 focuses on a close-up view within the ultra-telephoto range, the second lens group G2 moves from the second position M2 along the optical axis 410 towards the object side to the first position M1 to switch the focusing distance to a distant view.

[0124] in, Figure 7 The focusing distance (i.e., object distance) corresponding to the optical lens 41 shown in (a) is infinity. Figure 7 The focusing distance corresponding to the optical lens 41 shown in (b) is 50cm. Figure 7 The focusing distance corresponding to the optical lens 41 shown in (c) is 15cm. The second lens along... Figure 7 (a) in Figure 7 During the movement in (c), the focusing distance of the optical lens 41 gradually switches from infinity to a close distance of 15cm. When the optical lens 41 achieves a focusing distance of 15cm in the super telephoto range, that is, when it achieves super telephoto macro, it can capture the tiny details of the object under the premise of the magnification corresponding to the super telephoto range, thus improving the user's shooting experience.

[0125] Therefore, by reasonably setting the focusing distance of the second lens group G2, the optical lens 41 can switch between focusing on distant and close-up objects within the ultra-telephoto range, improving the performance of the optical lens 41. For example, by reasonably setting the optical parameters of the optical lens 41, when the second lens group G2 moves from the first position M1 to the second position M2, the focusing distance can be continuously switched from infinity to a close distance of 50cm, and then to a close distance of 15cm, achieving ultra-telephoto macro and improving the imaging effect of the optical lens 41. Simultaneously, since only the second lens group G2 needs to be moved during focusing, compared to embodiments that move multiple lens groups for focusing, the focusing distance can be shortened, reducing the size of the optical lens 41.

[0126] In some embodiments, please continue reading Figure 7 and combined Figure 6 The optical lens 41 satisfies the following relationship: H1 < H0. Where H0 is the distance between the end of the first interval 410A along the optical axis 410 near the object side and the end of the second interval 410B along the optical axis near the image side, and H1 is the distance between the first position M1 and the second position M2. That is, the maximum movement distance H1 (i.e., the focusing travel in the super-telephoto range) of the second lens group G2 when switching focus between distant and near views in the super-telephoto range is less than the movement distance H0 (i.e., the zoom travel) of the second lens group G2 when switching zoom between the super-telephoto and telephoto ranges.

[0127] The above formula, by controlling the maximum movement distance of the second lens group G2 during focus switching in the ultra-telephoto range to be less than the movement distance of the second lens group G2 during zoom switching, ensures that the field of view of the optical lens 41 does not change when switching focus distances in the ultra-telephoto range. That is, when switching from a distant scene to a close-up scene in the ultra-telephoto range, the optical lens 41 will not switch from the ultra-telephoto range to the telephoto range. Therefore, it avoids large changes in the field of view or magnification of the optical lens 41 during focusing, improving the continuity of focusing and enhancing the performance of the optical lens 41.

[0128] In some embodiments, when the optical lens 41 is in the telephoto range, the focus range can be switched by moving the second lens group G2. See also... Figure 8 , Figure 8 This is a schematic diagram illustrating the focusing process of the optical lens 41 in the telephoto range according to some embodiments of this application. Within the telephoto range, the second interval 410B includes a third position M3 and a fourth position M4. The fourth position M4 is located on the object side of the third position M3. During the focusing process of the optical lens 41 switching from a distant view to a close-up view, the second lens group G2 moves from the third position M3 to the fourth position M4. That is, when the optical lens 41 focuses on a distant view within the telephoto range, the second lens group G2 moves from the third position M3 along the optical axis 410 towards the object side to the fourth position M4 to switch the focusing distance to the close-up view. When the optical lens 41 focuses on a close-up view within the telephoto range, the second lens group G2 moves from the fourth position M4 along the optical axis 410 towards the image side to the third position M3 to switch the focusing distance to the distant view.

[0129] in, Figure 8 The focusing distance (i.e., object distance) corresponding to the optical lens 41 shown in (a) is infinity. Figure 8 The focusing distance corresponding to the optical lens 41 shown in (b) is 50cm. Figure 8 The focusing distance corresponding to the optical lens 41 shown in (c) is 15cm. The second lens along... Figure 8 (a) in Figure 8 During the movement in (c), the focusing distance of the optical lens 41 gradually switches from infinity to a close distance of 15cm. When the optical lens 41 achieves a focusing distance of 15cm in the telephoto range, that is, when it achieves telephoto macro, it can capture tiny details of the object under the premise of the magnification corresponding to the telephoto range, thus improving the user's shooting experience.

[0130] Therefore, by reasonably setting the focusing distance of the second lens group G2, the optical lens 41 can switch between focusing on distant and close-up objects within the telephoto range, improving the performance of the optical lens 41. For example, by reasonably setting the optical parameters of the optical lens 41, when the second lens group G2 moves from the third position M3 to the fourth position M4, the focusing distance can be continuously switched from infinity to a close distance of 50cm, and then to a close distance of 15cm, achieving telephoto macro and improving the imaging effect of the optical lens 41. At the same time, since only the second lens group G2 is moved, compared to embodiments that move multiple lens groups for focusing, the focusing distance can be shortened, reducing the size of the optical lens 41.

[0131] In some embodiments, please continue reading Figure 8 and combined Figure 6 The optical lens 41 satisfies the following relationship: H2 < H0. Where H0 is the distance between the end of the first interval 410A along the optical axis 410 near the object side and the end of the second interval 410B along the optical axis near the image side; H1 is the distance between the first position M1 and the second position M2; and H2 is the distance between the third position M3 and the fourth position M4. That is, the maximum movement distance H2 (focusing travel in the telephoto range) of the second lens group G2 when switching focus between distant and near views in the telephoto range is less than the movement distance H0 of the second lens group G2 when switching zoom between the super-telephoto and telephoto ranges.

[0132] The above formula, by controlling the maximum movement distance of the second lens group G2 during focus switching in the telephoto range to be less than the movement distance of the second lens group G2 during zoom switching, ensures that the field of view of the optical lens 41 does not change when switching focus distances in the telephoto range. That is, when switching from a distant scene to a close-up scene in the telephoto range, the optical lens 41 will not switch from the telephoto range to the super-telephoto range. Therefore, it avoids large changes in the field of view or magnification of the optical lens 41 during focusing, improves focusing continuity, and enhances the performance of the optical lens 41.

[0133] In some embodiments, please refer to Figure 6 , Figure 7 and Figure 8 The optical lens 41 satisfies the following relationship: H1 + H2 ≤ H0. Wherein, H0 is the distance between the end of the first interval 410A along the optical axis 410 near the object side and the end of the second interval 410B along the optical axis near the image side, and H2 is the distance between the third position M3 and the fourth position M4.

[0134] The above formula ensures that the sum of the movement distance of the second lens group G2 when switching focus in the ultra-telephoto range and when focusing in the telephoto range is less than the movement distance of the second lens group G2 when zooming between the ultra-telephoto and telephoto ranges. This prevents changes in the field of view when the optical lens 41 switches focus distances between the ultra-telephoto and telephoto ranges. In other words, when switching from a distant view to a close-up view, or vice versa, the optical lens 41 will not switch between the ultra-telephoto and telephoto ranges. Therefore, it avoids significant changes in the field of view or magnification of the optical lens 41 during focusing, improving focusing continuity and enhancing the performance of the optical lens 41.

[0135] In some embodiments, the optical lens 41 satisfies the following relationship: 7.5mm ≤ H0 ≤ 10mm. Wherein, H0 is the distance the second lens group G2 moves between the first interval 410A and the second interval 410B. Exemplarily, H0 can be 7.5mm, 7.6mm, 7.75mm, 7.9mm, 8mm, 8.3mm, 8.5mm, 8.7mm, 9mm, 9.1mm, 9.3mm, 9.6mm, 9.9mm, 10mm, etc.

[0136] The above relationship, by controlling H0 to be greater than or equal to the lower limit of 7.5mm, ensures that the optical lens 41 has sufficient zoom range to switch between telephoto and super telephoto lenses. Controlling H0 to be less than or equal to the upper limit of 10mm controls the overall length of the optical lens 41, which is beneficial for lens miniaturization.

[0137] In some embodiments, there is a first air gap d1 between the first lens group G1 and the second lens group G2, and a second air gap d2 between the second lens group G2 and the third lens group G3. When the second lens group G2 moves along the optical axis 410, the sum of d1 and d2 remains unchanged.

[0138] With the first lens group G1 and the third lens group G3 fixed, by keeping the sum of d1 and d2 constant, the stability of the optical path can be improved, ensuring that the total length of the optical lens 41 remains constant during zooming and focusing, and enhancing the stability of the image plane.

[0139] In some embodiments, please refer to Figure 9 , Figure 9 The following is a schematic diagram of the structure of an optical lens 41 provided in some embodiments of this application. The second lens group G2 also includes an aperture stop 414. The center line of the aperture stop 414 coincides with the optical axis 410 of the optical lens 41. When the second lens group G2 moves along the optical axis 410, the aperture of the aperture stop 414 remains unchanged.

[0140] Therefore, by setting the aperture 414 in the second lens group G2, and keeping the aperture 414 diameter unchanged during zooming and focusing, the aperture 414 can be adjusted to adjust the aperture value as the second lens group G2 moves, eliminating the need for a separate aperture 414 driving mechanism, thus reducing the complexity and power consumption of the camera module 40.

[0141] This application does not restrict the relative position of the aperture stop 414 within the second lens group G2, as long as the aperture stop 414 can constrain the light rays incident on the imaging surface 422a. For example, as... Figure 9 As shown, the second lens group G2 includes multiple lenses, and the aperture stop 414 is located on the object side of the lens closest to the object side in the second lens group G2 to effectively control the total brightness entering the system to adapt to different lighting conditions. It is understood that in other embodiments, the aperture stop 414 may also be located between the lenses of the second lens group G2, or between the second lens group G2 and the third lens group G3.

[0142] In some embodiments, the optical lens 41 satisfies the following relationship: 2.4 ≤ Fno1 ≤ 3.5. Wherein, Fno1 is the aperture value of the optical lens 41 at the telephoto end.

[0143] For example, Fno1 can be 2.4, 2.41, 2, 43, 2.45, 2.248, 2.5, 2.54, 2.59, 2.6, 2.67, 2.7, 2.73, 2.79, 2.82, 2.88, 2.93, 2.95, 3, 3.01, 3.05, 3.08, 3.12, 3.17, 3.2, 3.26, 3.29, 3.3, 3.36, 3.39, 3.4, 3.41, 3.44, 3.45, 3.47, 3.49, 3.5, etc.

[0144] The above relationship, by controlling Fno1 to be greater than or equal to the lower limit of 2.4 and less than or equal to the upper limit of 3.5, can ensure that the optical lens 41 has sufficient light intake in the telephoto range and ensures normal exposure of the image, while also controlling the depth of field and chromatic aberration, thereby improving the imaging quality of the optical lens 41.

[0145] In some embodiments, the optical lens 41 satisfies the following relationship: 3.5 ≤ Fno2 ≤ 4.8. Wherein, Fno2 is the aperture value of the optical lens 41 at the super-telephoto range. Exemplarily, Fno2 can be 3.5, 3.51, 3.53, 3.5, 3.57, 3.66, 3.63, 3.68, 3.9, 3.92, 3.95, 3.99, 4, 4.14, 4.18, 4.21, 4.27, 4.3, 4.35, 4.38, 4.4, 4.42, 4.48, 4.51, 4.53, 4.59, 4.63, 4.66, 4.68, 4.7, 4.71, 4.73, 4.75, 4.78, 4.8, etc.

[0146] The above relationship, by controlling Fno2 to be greater than or equal to the lower limit of 3.5 and less than or equal to the upper limit of 4.8, can ensure that the optical lens 41 has sufficient light intake in the super telephoto range and ensures normal exposure of the image, while also controlling the depth of field and chromatic aberration, ensuring that the optical lens 41 can achieve high-quality imaging in both the telephoto and super telephoto ranges, and improving the imaging quality of the optical lens 41.

[0147] In some embodiments, the optical lens 41 satisfies the following relationship: 0.95 ≤ TTL / FT ≤ 1.9. Wherein, TTL is the total optical length of the optical lens 41 extending along its own optical axis 410, and FT is the total effective focal length of the optical lens 41 in the ultra-telephoto range. Exemplarily, TTL / FT can be 0.95, 0.96, 0.98, 1, 1.01, 1.05, 1.08, 1.2, 1.23, 1.27, 1.28, 1.3, 1.33, 1, 38, 1.41, 1.46, 1.48, 1.5, 1.54, 1.55, 1.57, 1.61, 1.66, 1.69, 1.7, 1.71, 1.78, 1.8, 1.81, 1.83, 1.85, 1.89, 1.9, etc.

[0148] The above relationship, by controlling TTL / FT to be greater than or equal to the lower limit of 0.95, helps to ensure the zoom range of the optical lens 41 in the super telephoto and telephoto ranges, thereby improving the optical performance of the optical lens 41. By controlling TTL / FT to be less than or equal to the upper limit of 1.9, it is beneficial to control the length of the optical lens 41, thereby achieving miniaturization of the optical lens 41.

[0149] In some embodiments, the optical lens 41 satisfies the following relationship: 4.8 ≤ TTL / (IMH×2) ≤ 6.5. Wherein, TTL is the total optical length of the optical lens 41 along its own optical axis 410, IMH is the half-image height corresponding to the optical lens 41, and twice IMH is the diagonal size of the image sensor 422 corresponding to the optical lens 41. For example, TTL / (IMH×2) can be 4.8, 4.81, 4.83, 4.85, 4.89, 4.9, 4.94, 4.97, 5.01, 5.07, 5.11, 5.13, 5.18, 5.2, 5.25, 5.37, 5.49, 5.55, 5.67, 5.71, 5.79, 5.86, 5.93, 6.0, 6.13, 6.21, 6.28, 6.32, 6.37, 6.4, 6.41, 6.45, 6.49, 6.5, etc.

[0150] The above relationship, by controlling TTL / (IMH×2) to be greater than or equal to the lower limit of 4.8, is beneficial for controlling the length of the optical lens 41 and achieving miniaturization of the optical lens 41. By controlling TTL / (IMH×2) to be less than or equal to the upper limit of 6.5, it is beneficial for the optical lens 41 to achieve large target surface imaging and improve the imaging quality of the optical lens 41.

[0151] In some embodiments, the optical lens 41 satisfies the following relationship: 2.0 ≤ FT / FW ≤ 2.6. Wherein, FT is the total effective focal length of the optical lens in the super-telephoto range; FW is the total effective focal length of the optical lens 41 in the telephoto range. Exemplarily, TTL / (IMH×2) can be 2.0, 2.01, 2.04, 2.07, 2.09, 2.1, 2.14, 2.19, 2.22, 2.25, 2.27, 2.31, 2.35, 2.39, 2.4, 2.43, 2.49, 2.5, 2.51, 2.53, 2.55, 2.59, 2.6, etc.

[0152] The above relationship, by controlling FT / FW to be greater than or equal to the lower limit of 2.0, facilitates a longer zoom range, allowing the optical lens 41 to have a longer focal length in the super-telephoto range, which in turn improves the resolution of the optical lens 41 in the telephoto range. By controlling FT / FW to be less than or equal to the upper limit of 2.6, it is beneficial to control the length of the optical lens 41, thereby achieving miniaturization of the optical lens 41.

[0153] In some embodiments, the optical lens 41 satisfies the following relationship: 1.5 ≤ |FT / LEF1| ≤ 2.0. Wherein, FT is the total effective focal length of the optical lens in the super-telephoto range; LEF1 is the combined focal length of the first lens group G1. Exemplarily, |FT / LEF1| can be 1.5, 1.51, 1.54, 1.55, 1.58, 1.61, 1.67, 1.72, 1.75, 1.77, 1.78, 1.8, 1.81, 1.86, 1.9, 1.91, 1.94, 1.95, 1.98, 2.0, etc.

[0154] The above relationship limits the absolute range of the ratio of the total effective focal length of the optical lens 41 in the super telephoto range to the combined focal length of the first lens group G1, which is beneficial for the rational allocation of the focal lengths of the first lens group G1, the second lens group G2 and the third lens group G3, thereby improving the imaging quality of the optical lens 41.

[0155] In some embodiments, the optical lens 41 satisfies the following relationship: 1.2 ≤ |LEF1 / LEF2| ≤ 2.0. Wherein, LEF1 is the combined focal length of the first lens group G1; LEF2 is the combined focal length of the second lens group G2. Exemplarily, |LEF1 / LEF2| can be 1.2, 1.21, 1.24, 1.27, 1.29, 1.3, 1.32, 1.35, 1.39, 1.45, 1.48, 1.54, 1.59, 1.63, 1.7, 1.71, 1.78, 1.84, 1.88, 1.9, 1.91, 1.92, 1.95, 1.99, 2.0, etc.

[0156] The above relationship limits the absolute range of the ratio of the combined focal length of the first lens group G1 to the combined focal length of the second lens group G2. This is beneficial for the reasonable distribution of the optical power of the first lens group G1, the second lens group G2, and the third lens group G3, so as to adjust the optical path. This can effectively prevent the optical path outside the field of view from reaching the imaging surface 422a and thus damaging the imaging performance, thereby improving the imaging quality of the optical lens 41.

[0157] In some embodiments, please refer to Figure 10 , Figure 10 This is a schematic diagram of the structure of an optical lens 41 provided in some embodiments of this application, wherein, Figure 10 (a) in the middle is Figure 10 The provided schematic diagram shows the structure of the optical lens at the ultra-telephoto range. Figure 10 (b) in the middle is Figure 10The provided optical lens provides a structural schematic diagram in the telephoto range. The optical lens 41 also includes a first refractive element 411, located on the object side of the first lens group G1. The first refractive element 411 is used to deflect light onto the optical lens 41. This ensures that the optical axis 410 of the optical lens 41 is not parallel to the thickness direction of the electronic device 100, which helps reduce the size of the optical lens 41 in the thickness direction of the electronic device 100, thus reducing the thickness of the electronic device 100, and allowing the optical lens 41 to be applied to a periscope camera module 40.

[0158] Among them, such as Figure 10 As shown, when the first refracting element 411 deflects the light by 90°, the camera module can function as a periscope camera, that is, the optical axis 410 of the optical lens 41 is perpendicular to the thickness direction of the electronic device 100.

[0159] This application does not limit the specific structural form of the first refractive element 411. Exemplarily, the first refractive element 411 may include a prism, a mirror, or a Schmidt prism. For example, the prism may include any prism such as a right-angle prism, a triangular prism, a square prism, or a pentaangular prism.

[0160] In some embodiments, please refer to Figure 11 , Figure 11 This is a schematic diagram illustrating the structure of an optical lens 41 provided in other embodiments of this application. Figure 11 (a) in the middle is Figure 11 The provided schematic diagram shows the structure of the optical lens at the ultra-telephoto range. Figure 11 (b) in the middle is Figure 11 The provided schematic diagram shows the structure of the optical lens in the telephoto range. The optical lens 41 also includes a second refracting element 412, located on the image side of the third lens group G3. The second refracting element 412 is used to deflect light to the image sensor 422. This allows the image plane of the optical lens 41 to be less perpendicular to the optical axis 410, which is beneficial for the optical lens 41 to achieve large target surface imaging and improve the imaging quality of the optical lens 41.

[0161] This application does not limit the specific structural form of the second refracting element 412. Exemplarily, the second refracting element 412 may include a prism, a mirror, or a Schmidt prism. For example, the prism may include any prism such as a right-angle prism, a triangular prism, a square prism, or a pentaangular prism.

[0162] It should be noted that, Figure 11 The example described uses an optical lens 41 that includes both a first refractive element 411 and a second refractive element 412. It is understood that in other examples, the optical lens 41 may include only the second refractive element 412.

[0163] The following describes a camera module 40 that uses the above-described optical lens 41 (all optical lenses 41 satisfy the above-described relationship) with specific embodiments.

[0164] Example 1

[0165] Example 1 of this application provides a camera module 40, which includes the aforementioned optical lens 41. Please refer to... Figure 12 , Figure 12 This is a schematic diagram of the simulated structure of the optical lens 41 provided in Example 1. Wherein, Figure 12 (a) in Example 1 is a schematic diagram of the simulated structure of the optical lens 41 in the ultra-telephoto range. Figure 12 (b) is a schematic diagram of the optical lens 41 provided in Example 1 at the telephoto end. The optical lens 41 includes a first lens group G1, a second lens group G2, a third lens group G3, and a filter 421, which are sequentially distributed from the object side to the image side along the optical axis 410 of the optical lens 41. The first lens group G1 and the third lens group G3 are fixed lens groups with negative optical power, and the second lens group G2 is a movable lens group with positive optical power.

[0166] The first lens group G1 includes a first lens L1 and a second lens L2 arranged sequentially from the object side to the image side. The combined focal length LEF1 of the first lens group G1 is negative. The first lens L1 has an object-side surface S1 and an image-side surface S2. The second lens L2 has an object-side surface S3 and an image-side surface S4.

[0167] The second lens group G2 includes a third lens L3 and a fourth lens L4 arranged sequentially from the object side to the image side. The combined focal length LEF2 of the second lens group G2 is positive. An aperture stop 414 is positioned between the third lens L3 and the fourth lens L4. During the movement of the second lens group G2 along the optical axis 410, the relative position of the aperture stop 414 with the other lenses within the second lens group G2 remains unchanged, and the aperture of the aperture stop 414 also remains unchanged. The third lens L3 has an object-side surface S5 and an image-side surface S6, the aperture stop 414 has a surface number corresponding to S7, and the fourth lens L4 has an object-side surface S8 and an image-side surface S9.

[0168] The third lens group G3 includes a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged sequentially from the object side to the image side. The combined focal length LEF3 of the third lens group G3 is negative. The fifth lens L5 has an object-side surface S11 and an image-side surface S12, the sixth lens L6 has an object-side surface S13 and an image-side surface S14, and the seventh lens L7 has an object-side surface S15 and an image-side surface S16.

[0169] The filter 421 has an object side surface S17 and an image side surface S18.

[0170] like Figure 12As shown, when the optical lens 41 switches from the ultra-telephoto mode to the telephoto mode, the second lens group G2 moves towards the object side along the optical axis 410. When the optical lens 41 switches from the telephoto mode to the ultra-telephoto mode, the second lens group G2 moves towards the image side along the optical axis 410.

[0171] Table 1a shows the design parameters for each lens and filter 421 in Example 1, where the Y-radius, thickness, focal length, and combined focal length are all in millimeters (mm), as shown below:

[0172] Table 1a

[0173]

[0174] It should be noted that Table 1a uses 555nm as the reference wavelength. In Table 1a, blank spaces indicate that there are no requirements for the numerical values; Infinity has infinite curvature, meaning that the surface is a plane. Thickness refers to the thickness of the optical element along the optical axis 410 or the thickness of the air gap between optical elements. The thickness corresponding to the row containing the object side of the first lens L1 is the thickness of the first lens L1 along the optical axis 410, and the thickness corresponding to the row containing the image side of the first lens L1 is the distance from the image side of the first lens L1 to the object side of the second lens L2 along the optical axis 410, and so on.

[0175] The sagitta of the aspherical surface in each of the above lens groups can be calculated using the following formula:

[0176]

[0177] Where z is a point on the aspherical surface at a distance r from the optical axis 410, and its relative distance to the tangent plane at the intersection point on the aspherical surface optical axis 410; r is the perpendicular distance between a point on the aspherical curve and the optical axis 410; c is the curvature of the fixed-point sphere on the aspherical surface; k is the conic coefficient; and α... i Let be an i-th order aspherical constant.

[0178] Table 1b lists the aspherical coefficients of each lens group in Example 1, as shown in the table below:

[0179] Table 1b

[0180]

[0181] By employing the aforementioned lenses, and with the combination of optical parameters such as the number of lenses, focal length, thickness, refractive index, and Abbe number of each lens, the optical lens 41 can switch between telephoto and super telephoto ranges by moving the second lens group G2. This also enables the optical lens 41 to have features such as small size and the ability to achieve macro photography in each field of view. The optical parameters of the optical lens 41 composed of the aforementioned lenses can be found in Table 1c below.

[0182] Table 1c shows the basic parameters of optical lens 41 in Example 1, as follows:

[0183] Table 1c

[0184]

[0185]

[0186] Wherein, MIC stands for Maximum image circle, which refers to the largest circular area that the optical lens 41 can form on the imaging plane 422a. Light rays exceeding this area will not be captured by the lens, thus affecting image quality. MIC = IMH * 2 + mechanical margin. MFOV is the mechanical field of view corresponding to MIC.

[0187] Table 1d shows the basic parameters of optical lens 41 in Example 1, as follows:

[0188] Table 1d

[0189] super telephoto telephoto LEF1+LEF2 / mm 27.78 11.04 LEF2+LEF3 / mm 6.77 7.99

[0190] Wherein, LEF1+LEF2 is the combined focal length of the first lens group G1 and the second lens group G2, and LEF2+LEF3 is the combined focal length of the second lens group G2 and the third lens group G3.

[0191] As shown in Tables 1b and 1c, in Example 1 of this application, the sum of d1 and d2 is 9.9075 in the telephoto range and the sum of d1 and d2 is 9.9075 in the super telephoto range. From the super telephoto range to the telephoto range, the combined focal length of the first lens group G1 and the second lens group G2 decreases, while the combined focal length of the second lens group G2 and the third lens group G3 increases.

[0192] Based on the values ​​of the above parameters, it can be calculated that in this example:

[0193] TTL / FT=0.997; TTL / (IMH×2)=4.95; FT / FW=2.52;

[0194] |FT / LEF1|=1.66, |LEF1 / LEF2|=2.0.

[0195] As can be seen, the values ​​of each condition in this example are all within the aforementioned limits.

[0196] Please see Figure 13 As shown, Figure 13 This is a graph showing the astigmatism of light after it passes through the optical lens 41 in Example 1. Figure 13 (a) in the figure is the astigmatism curve of optical lens 41 in Example 1 at the super telephoto range. Figure 13 Figure (b) shows the astigmatism curve of the optical lens 41 in the telephoto range of Example 1. The horizontal axis represents the focus shift, and the vertical axis represents the image height, both in mm. The five sets of curves represent wavelengths of 435nm, 470nm, 555nm, 610nm, and 650nm. In each set of curves, the solid line represents the focus shift curve in the meridional direction, and the dashed line represents the focus shift curve in the sagittal direction. Figure 13 As can be seen, in different bands, the focal shift of the optical lens 41 in the meridional and sagittal directions in the telephoto and super telephoto ranges is controlled within the range of -0.01mm to 0.10mm. The meridional and sagittal curves are relatively close. In other words, the optical lens 41 in Example 1 has small astigmatism and field curvature, and can focus most of the light on the correct focus point, making the image clearer and sharper.

[0197] Please see Figure 14 As shown, Figure 14 This is a distortion curve of light after passing through optical lens 41 in Example 1. Figure 14 (a) in the figure is the distortion curve of light at the super telephoto end after passing through optical lens 41 in Example 1. Figure 14 (b) shows the distortion curve of light rays after passing through optical lens 41 in Example 1 at the telephoto end. The horizontal axis represents the distortion rate (%), and the vertical axis represents the image height (mm). The five curves represent wavelengths of 435nm, 470nm, 555nm, 610nm, and 650nm, respectively. Figure 14 As can be seen, the distortion rate is controlled within the range of -2% to 0. In other words, the image captured by the optical lens 41 in Example 1 has a small degree of distortion and low distortion.

[0198] Example 2

[0199] Example 2 of this application provides a camera module 40, which includes the aforementioned optical lens 41. Please refer to... Figure 15 , Figure 15 This is a schematic diagram of the simulated structure of the optical lens 41 provided in Example 2. Wherein, Figure 15 (a) in Example 2 is a schematic diagram of the simulated structure of the optical lens 41 in the ultra-telephoto range. Figure 15 (b) in Example 2 is a schematic diagram of the optical lens 41 in the telephoto range. The optical lens 41 includes a first lens group G1, a second lens group G2, a third lens group G3, and a filter 421, which are sequentially distributed from the object side to the image side along the optical axis 410 of the optical lens 41. The first lens group G1 and the third lens group G3 are fixed lens groups with negative optical power, and the second lens group G2 is a movable lens group with positive optical power.

[0200] The first lens group G1 includes a first lens L1 and a second lens L2 arranged sequentially from the object side to the image side. The combined focal length LEF1 of the first lens group G1 is negative. The first lens L1 has an object-side surface S1 and an image-side surface S2. The second lens L2 has an object-side surface S3 and an image-side surface S4.

[0201] The second lens group G2 includes a third lens L3 and a fourth lens L4 arranged sequentially from the object side to the image side. The combined focal length LEF2 of the second lens group G2 is positive. An aperture stop 414 is positioned between the third lens L3 and the fourth lens L4. During the movement of the second lens group G2 along the optical axis 410, the relative position of the aperture stop 414 with the other lenses within the second lens group G2 remains unchanged, and the aperture of the aperture stop 414 also remains unchanged. The third lens L3 has an object-side surface S5 and an image-side surface S6, the aperture stop 414 has a surface number corresponding to S7, and the fourth lens L4 has an object-side surface S8 and an image-side surface S9.

[0202] The third lens group G3 includes a fifth lens L5 and a sixth lens L6 arranged sequentially from the object side to the image side. The combined focal length LEF3 of the third lens group G3 is negative. The fifth lens L5 has an object-side surface S10 and an image-side surface S11, and the sixth lens L6 has an object-side surface S12 and an image-side surface S13.

[0203] The filter 421 has an object side surface S14 and an image side surface S15.

[0204] like Figure 15 As shown, when the optical lens 41 switches from the ultra-telephoto mode to the telephoto mode, the second lens group G2 moves towards the object side along the optical axis 410. When the optical lens 41 switches from the telephoto mode to the ultra-telephoto mode, the second lens group G2 moves towards the image side along the optical axis 410.

[0205] Table 2a shows the design parameters for each lens and filter 421 in Example 2, where the Y-radius, thickness, focal length, and combined focal length are all in millimeters (mm), as shown below:

[0206] Table 2a

[0207]

[0208]

[0209] It should be noted that Table 2a uses 555nm as the reference wavelength. In Table 2a, blank spaces indicate that there are no requirements for the numerical values; Infinity has infinite curvature, meaning that the surface is a plane. Thickness refers to the thickness of the optical element along the optical axis 410 or the thickness of the air gap between optical elements. The thickness corresponding to the row containing the object side of the first lens L1 is the thickness of the first lens L1 along the optical axis 410, and the thickness corresponding to the row containing the image side of the first lens L1 is the distance from the image side of the first lens L1 to the object side of the second lens L2 along the optical axis 410, and so on.

[0210] The sagitta of the aspherical surface in each of the above lens groups can be calculated using the following formula:

[0211]

[0212] Where z is a point on the aspherical surface at a distance r from the optical axis 410, and its relative distance to the tangent plane at the intersection point on the aspherical surface optical axis 410; r is the perpendicular distance between a point on the aspherical curve and the optical axis 410; c is the curvature of the fixed-point sphere on the aspherical surface; k is the conic coefficient; and α... i Let be an i-th order aspherical constant.

[0213] Table 2b lists the aspherical coefficients of each lens group in Example 2, as shown in the table below:

[0214] Table 2b

[0215]

[0216] By employing the aforementioned lenses, and with the combination of optical parameters such as the number of lenses, focal length, thickness, refractive index, and Abbe number of each lens, the optical lens 41 can switch between telephoto and super telephoto ranges by moving the second lens group G2. This also enables the optical lens 41 to have features such as small size and the ability to achieve macro photography in each field of view. The optical parameters of the optical lens 41 composed of the aforementioned lenses can be found in Table 2c below.

[0217] Table 2c shows the basic parameters of optical lens 41 in Example 2, as follows:

[0218] Table 2c

[0219]

[0220] Wherein, MIC stands for Maximum image circle, which refers to the largest circular area that the optical lens 41 can form on the imaging plane 422a. Light rays exceeding this area will not be captured by the lens, thus affecting image quality. MIC = IMH * 2 + mechanical margin. MFOV is the mechanical field of view corresponding to MIC.

[0221] Table 2d shows the basic parameters of optical lens 41 in Example 2, as follows:

[0222] Table 2d

[0223] super telephoto telephoto LEF1+LEF2 / mm 28.82 11.36 LEF2+LEF3 / mm 8.53 9.21

[0224] Wherein, LEF1+LEF2 is the combined focal length of the first lens group G1 and the second lens group G2, and LEF2+LEF3 is the combined focal length of the second lens group G2 and the third lens group G3.

[0225] As shown in Tables 2b and 2c, in Example 2 of this application, the sum of d1 and d2 is 16.11 in the telephoto range and in the super telephoto range. From the super telephoto range to the telephoto range, the combined focal length of the first lens group G1 and the second lens group G2 decreases, while the combined focal length of the second lens group G2 and the third lens group G3 increases.

[0226] Based on the values ​​of the above parameters, it can be calculated that in this example:

[0227] TTL / FT=1.014; TTL / (IMH×2)=5.21; FT / FW=2.54;

[0228] |FT / LEF1|=1.68, |LEF1 / LEF2|=1.91.

[0229] As can be seen, the values ​​of each condition in this example are all within the aforementioned limits.

[0230] Please see Figure 16 As shown, Figure 16 This is a graph showing the astigmatism of light after passing through optical lens 41 in Example 2. Figure 16 (a) in Example 2 shows the astigmatism curve of optical lens 41 at the ultra-telephoto range. Figure 16 Figure (b) shows the astigmatism curve of optical lens 41 in Example 2 at the telephoto end. The horizontal axis represents the focus shift, and the vertical axis represents the image height, both in mm. The five sets of curves represent wavelengths of 435nm, 470nm, 555nm, 610nm, and 650nm. In each set, the solid line represents the focus shift curve in the meridional direction, and the dashed line represents the focus shift curve in the sagittal direction. Figure 16As can be seen, in different wavelength bands, the focal shift of optical lens 41 in both the meridional and sagittal directions in the super telephoto range is controlled within the range of -0.01mm to 0.30mm, and in both the meridional and sagittal directions in the telephoto range is controlled within the range of -0.2mm to 0.10mm. The meridional and sagittal curves are quite close, which means that the astigmatism and field curvature of optical lens 41 in Example 2 are relatively small, and it can focus most of the light on the correct focus point, making the image clearer and sharper.

[0231] Please see Figure 17 As shown, Figure 17 This is a distortion curve of light after passing through optical lens 41 in Example 2. Figure 17 (a) in the figure is the distortion curve of light at the super telephoto end after passing through optical lens 41 in Example 2. Figure 17 (b) in the figure shows the distortion curve of light rays after passing through optical lens 41 in Example 2 at the telephoto end. The horizontal axis represents the distortion rate (%), and the vertical axis represents the image height (mm). The five curves represent wavelengths of 435nm, 470nm, 555nm, 610nm, and 650nm, respectively. Figure 17 As can be seen, the distortion rate is controlled within the range of -2% to 0. In other words, the image captured by the optical lens 41 in Example 2 has a small degree of distortion and low distortion.

[0232] Example 3

[0233] Example 3 of this application provides a camera module 40, which includes the aforementioned optical lens 41. Please refer to... Figure 18 , Figure 18 This is a schematic diagram of the simulated structure of the optical lens 41 provided in Example 3. Among them, Figure 18 (a) in Example 3 is a schematic diagram of the simulated structure of the optical lens 41 in the ultra-telephoto range. Figure 18 (b) is a schematic diagram of the optical lens 41 provided in Example 3 at the telephoto end. The optical lens 41 includes a first lens group G1, a second lens group G2, a third lens group G3, and a filter 421, which are sequentially distributed from the object side to the image side along the optical axis 410 of the optical lens 41. The first lens group G1 and the third lens group G3 are fixed lens groups with negative optical power, and the second lens group G2 is a movable lens group with positive optical power.

[0234] The first lens group G1 includes a first lens L1 and a second lens L2 arranged sequentially from the object side to the image side. The combined focal length LEF1 of the first lens group G1 is negative. The first lens L1 has an object-side surface S1 and an image-side surface S2. The second lens L2 has an object-side surface S3 and an image-side surface S4.

[0235] The second lens group G2 includes a third lens L3 and a fourth lens L4 arranged sequentially from the object side to the image side. The combined focal length LEF2 of the second lens group G2 is positive. An aperture stop 414 is positioned between the third lens L3 and the fourth lens L4. During the movement of the second lens group G2 along the optical axis 410, the relative position of the aperture stop 414 with the other lenses within the second lens group G2 remains unchanged, and the aperture of the aperture stop 414 also remains unchanged. The third lens L3 has an object-side surface S5 and an image-side surface S6, the aperture stop 414 has a surface number corresponding to S7, and the fourth lens L4 has an object-side surface S8 and an image-side surface S9.

[0236] The third lens group G3 includes a fifth lens L5 and a sixth lens L6 arranged sequentially from the object side to the image side. The combined focal length LEF3 of the third lens group G3 is negative. The fifth lens L5 has an object-side surface S10 and an image-side surface S10, and the sixth lens L6 has an object-side surface S12 and an image-side surface S13.

[0237] The filter 421 has an object side surface S14 and an image side surface S15.

[0238] like Figure 18 As shown, when the optical lens 41 switches from the ultra-telephoto mode to the telephoto mode, the second lens group G2 moves towards the object side along the optical axis 410. When the optical lens 41 switches from the telephoto mode to the ultra-telephoto mode, the second lens group G2 moves towards the image side along the optical axis 410.

[0239] Table 3a shows the design parameters for each lens and filter 421 in Example 3, where the Y-radius, thickness, focal length, and combined focal length are all in millimeters (mm), as shown below:

[0240] Table 3a

[0241]

[0242]

[0243] It should be noted that Table 3a uses 555nm as the reference wavelength. In Table 3a, blank spaces indicate that there are no requirements for the numerical values; Infinity has infinite curvature, meaning that the surface is a plane. Thickness refers to the thickness of the optical element along the optical axis 410 or the thickness of the air gap between optical elements. The thickness corresponding to the row containing the object side of the first lens L1 is the thickness of the first lens L1 along the optical axis 410, and the thickness corresponding to the row containing the image side of the first lens L1 is the distance from the image side of the first lens L1 to the object side of the second lens L2 along the optical axis 410, and so on.

[0244] The sagitta of the aspherical surface in each of the above lens groups can be calculated using the following formula:

[0245]

[0246] Where z is a point on the aspherical surface at a distance r from the optical axis 410, and its relative distance to the tangent plane at the intersection point on the aspherical surface optical axis 410; r is the perpendicular distance between a point on the aspherical curve and the optical axis 410; c is the curvature of the fixed-point sphere on the aspherical surface; k is the conic coefficient; and α... i Let be an i-th order aspherical constant.

[0247] Table 3b shows the aspherical coefficients of each lens group in Example 3, as shown in the table below:

[0248] Table 3b

[0249]

[0250] By employing the aforementioned lenses, and with the combination of optical parameters such as the number of lenses, focal length, thickness, refractive index, and Abbe number of each lens, the optical lens 41 can switch between telephoto and super telephoto ranges by moving the second lens group G2. This also enables the optical lens 41 to have features such as small size and the ability to achieve macro photography in each field of view. The optical parameters of the optical lens 41 composed of the aforementioned lenses can be found in Table 3c below.

[0251] Table 3c shows the basic parameters of optical lens 41 in Example 3, as follows:

[0252] Table 3c

[0253]

[0254] Wherein, MIC stands for Maximum image circle, which refers to the largest circular area that the optical lens 41 can form on the imaging plane 422a. Light rays exceeding this area will not be captured by the lens, thus affecting image quality. MIC = IMH * 2 + mechanical margin. MFOV is the mechanical field of view corresponding to MIC.

[0255] Table 3d shows the basic parameters of optical lens 41 in Example 3, as follows:

[0256] Table 3d

[0257] super telephoto telephoto LEF1+LEF2 / mm 22.99 11.02 LEF2+LEF3 / mm 7.44 8.92

[0258] Wherein, LEF1+LEF2 is the combined focal length of the first lens group G1 and the second lens group G2, and LEF2+LEF3 is the combined focal length of the second lens group G2 and the third lens group G3.

[0259] As shown in Tables 3b and 3c, in Example 3 of this application, the sum of d1 and d2 is 8.66 in the telephoto range and the sum of d1 and d2 is 8.66 in the super telephoto range. From the super telephoto range to the telephoto range, the combined focal length of the first lens group G1 and the second lens group G2 decreases, while the combined focal length of the second lens group G2 and the third lens group G3 increases.

[0260] Based on the values ​​of the above parameters, it can be calculated that in this example:

[0261] TTL / FT=1.17; TTL / (IMH×2)=5.0; FT / FW=2.08;

[0262] |FT / LEF1|=1.57, |LEF1 / LEF2|=1.59.

[0263] As can be seen, the values ​​of each condition in this example are all within the aforementioned limits.

[0264] Please see Figure 19 As shown, Figure 19 This is a graph showing the astigmatism of light after passing through the optical lens 41 in Example 3. Figure 19 (a) in Example 3 shows the astigmatism curve of optical lens 41 at the ultra-telephoto range. Figure 19 Figure (b) shows the astigmatism curves of optical lens 41 in the telephoto range for Example 3. The horizontal axis represents focus shift, and the vertical axis represents image height, both in mm. The five sets of curves represent wavelengths of 435nm, 470nm, 555nm, 610nm, and 650nm. In each set, the solid line represents the focus shift curve in the meridional direction, and the dashed line represents the focus shift curve in the sagittal direction. Figure 19 As can be seen, in different bands, the focal shift of optical lens 41 in the meridional and sagittal directions in both the super telephoto and telephoto ranges is controlled within the range of -0.20mm to 0.20mm. The meridional and sagittal curves are relatively close. In other words, the astigmatism and field curvature of optical lens 41 in Example 3 are both small, which can focus most of the light on the correct focus point, making the image clearer and sharper.

[0265] Please see Figure 20 As shown, Figure 20 This is a distortion curve of light after passing through optical lens 41 in Example 3. Figure 14 (a) in the figure is the distortion curve of light at the super telephoto end after passing through optical lens 41 in Example 3. Figure 20(b) shows the distortion curve of light rays after passing through optical lens 41 in Example 3 at the telephoto end. The horizontal axis represents the distortion rate (%), and the vertical axis represents the image height (mm). The five curves represent wavelengths of 435nm, 470nm, 555nm, 610nm, and 650nm, respectively. Figure 20 As can be seen, the distortion rate is controlled within the range of -2% to 2%, which means that the image captured by the optical lens 41 in Example 3 has a small degree of distortion and low distortion.

[0266] Example 4

[0267] Example 4 of this application provides a camera module 40, which includes the aforementioned optical lens 41. Please refer to... Figure 21 , Figure 21 This is a schematic diagram of the simulated structure of the optical lens 41 provided in Example 4. Wherein, Figure 21 (a) in Example 4 is a schematic diagram of the simulated structure of the optical lens 41 in the ultra-telephoto range. Figure 21 (b) in Example 4 is a schematic diagram of the optical lens 41 in the telephoto range. The optical lens 41 includes a first lens group G1, a second lens group G2, a third lens group G3, and a filter 421, which are sequentially distributed from the object side to the image side along the optical axis 410 of the optical lens 41. The first lens group G1 and the third lens group G3 are fixed lens groups with negative optical power, and the second lens group G2 is a movable lens group with positive optical power.

[0268] The first lens group G1 comprises a first lens L1, a second lens L2, and a third lens L3 arranged sequentially from the object side to the image side. The combined focal length LEF1 of the first lens group G1 is negative. The first lens L1 has an object-side surface S1 and an image-side surface S2. The second lens L2 has an object-side surface S3 and an image-side surface S4, and the third lens L3 has an object-side surface S5 and an image-side surface S6.

[0269] The second lens group G2 includes a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged sequentially from the object side to the image side. The combined focal length LEF2 of the second lens group G2 is positive. The fourth lens L4 has an object-side surface S7 and an image-side surface S8, the fifth lens L5 has an object-side surface S9 and an image-side surface S10, the sixth lens L6 has an object-side surface S10 and an image-side surface S11, and the seventh lens L7 has an object-side surface S12 and an image-side surface S13.

[0270] The third lens group G3 includes an eighth lens L8, a ninth lens L9, and a tenth lens L10 arranged sequentially from the object side to the image side. The combined focal length LEF3 of the third lens group G3 is negative. The eighth lens L8 has an object-side surface S14 and an image-side surface S15, the ninth lens L9 has an object-side surface S16 and an image-side surface S17, and the tenth lens L10 has an object-side surface S18 and an image-side surface S19.

[0271] The filter 421 has an object side surface S20 and an image side surface S21.

[0272] like Figure 21 As shown, when the optical lens 41 switches from the ultra-telephoto mode to the telephoto mode, the second lens group G2 moves towards the object side along the optical axis 410. When the optical lens 41 switches from the telephoto mode to the ultra-telephoto mode, the second lens group G2 moves towards the image side along the optical axis 410.

[0273] Table 4a shows the design parameters for each lens and filter 421 in Example 4, where the Y-radius, thickness, focal length, and combined focal length are all in millimeters (mm), as shown below:

[0274] Table 4a

[0275]

[0276]

[0277] It should be noted that Table 4a uses 555nm as the reference wavelength. In Table 4a, blank spaces indicate that there are no requirements for the numerical value; Infinity has infinite curvature, meaning that the surface is a plane. Thickness refers to the thickness of the optical element along the optical axis 410 or the thickness of the air gap between optical elements. The thickness corresponding to the row containing the object side of the first lens L1 is the thickness of the first lens L1 along the optical axis 410, and the thickness corresponding to the row containing the image side of the first lens L1 is the distance from the image side of the first lens L1 to the object side of the second lens L2 along the optical axis 410, and so on.

[0278] The sagitta of the aspherical surface in each of the above lens groups can be calculated using the following formula:

[0279]

[0280] Where z is a point on the aspherical surface at a distance r from the optical axis 410, and its relative distance to the tangent plane at the intersection point on the aspherical surface optical axis 410; r is the perpendicular distance between a point on the aspherical curve and the optical axis 410; c is the curvature of the fixed-point sphere on the aspherical surface; k is the conic coefficient; and α... i Let be an i-th order aspherical constant.

[0281] Table 4b lists the aspherical coefficients of each lens group in Example 4, as shown in the table below:

[0282] Table 4b

[0283]

[0284]

[0285] By employing the aforementioned lenses, and with the combination of optical parameters such as the number of lenses, focal length, thickness, refractive index, and Abbe number of each lens, the optical lens 41 can switch between telephoto and super telephoto ranges by moving the second lens group G2. This also enables the optical lens 41 to have features such as small size and the ability to achieve macro photography in each field of view. The optical parameters of the optical lens 41 composed of the aforementioned lenses can be found in Table 4c below.

[0286] Table 4c shows the basic parameters of optical lens 41 in Example 4, as follows:

[0287] Table 4c

[0288]

[0289] Wherein, MIC stands for Maximum image circle, which refers to the largest circular area that the optical lens 41 can form on the imaging plane 422a. Light rays exceeding this area will not be captured by the lens, thus affecting image quality. MIC = IMH * 2 + mechanical margin. MFOV is the mechanical field of view corresponding to MIC.

[0290] Table 4d shows the basic parameters of optical lens 41 in Example 4, as follows:

[0291] Table 4d

[0292] super telephoto telephoto LEF1+LEF2 / mm 23.43 11.19 LEF2+LEF3 / mm 10.19 11.80

[0293] Wherein, LEF1+LEF2 is the combined focal length of the first lens group G1 and the second lens group G2, and LEF2+LEF3 is the combined focal length of the second lens group G2 and the third lens group G3.

[0294] As shown in Tables 4b and 4c, in Example 4 of this application, the sum of d1 and d2 is 16.42 in the telephoto range and in the super telephoto range. From the super telephoto range to the telephoto range, the combined focal length of the first lens group G1 and the second lens group G2 decreases, while the combined focal length of the second lens group G2 and the third lens group G3 increases.

[0295] Based on the values ​​of the above parameters, it can be calculated that in this example:

[0296] TTL / FT=1.862; TTL / (IMH×2)=6.41; FT / FW=2.09;

[0297] |FT / LEF1|=1.52, |LEF1 / LEF2|=1.24.

[0298] As can be seen, the values ​​of each condition in this example are all within the aforementioned limits.

[0299] Please see Figure 22 As shown, Figure 22 This is a graph showing the astigmatism of light after it passes through optical lens 41 in Example 4. Figure 22 (a) in Example 4 shows the astigmatism curve of optical lens 41 at the ultra-telephoto range. Figure 22 Figure (b) shows the astigmatism curves of optical lens 41 in the telephoto range for Example 4. The horizontal axis represents focus shift, and the vertical axis represents image height, both in mm. The five sets of curves represent wavelengths of 435nm, 470nm, 555nm, 610nm, and 650nm. In each set, the solid line represents the focus shift curve in the meridional direction, and the dashed line represents the focus shift curve in the sagittal direction. Figure 22 As can be seen, in different wavelength bands, the focal shift of optical lens 4 in both the meridional and sagittal directions in the super telephoto range is controlled within the range of -0.10mm to 0.02mm, and in both the meridional and sagittal directions in the telephoto range is controlled within the range of -0.05mm to 0.05mm. The meridional and sagittal curves are quite close, which means that the astigmatism and field curvature of optical lens 41 in Example 4 are both small, and it can focus most of the light on the correct focus point, making the image clearer and sharper.

[0300] Please see Figure 23 As shown, Figure 23 This is a distortion curve of light after passing through optical lens 41 in Example 4. Figure 23 (a) in the figure is the distortion curve of light at the super telephoto end after passing through optical lens 41 in Example 4. Figure 23 (b) in the figure shows the distortion curve of light rays after passing through optical lens 41 in Example 4 at the telephoto end. The horizontal axis represents the distortion rate (%), and the vertical axis represents the image height (mm). The five curves represent wavelengths of 435nm, 470nm, 555nm, 610nm, and 650nm, respectively. Figure 23 As can be seen, the distortion rate is controlled within the range of -2% to 2%, which means that the image captured by the optical lens 41 in Example 4 has a small degree of distortion and low distortion.

[0301] Example 5

[0302] Example 5 of this application provides a camera module 40, which includes the aforementioned optical lens 41. Please refer to... Figure 24 , Figure 24 This is a schematic diagram of the simulated structure of the optical lens 41 provided in Example 5. Among them, Figure 24 (a) in Example 5 is a schematic diagram of the simulated structure of the optical lens 41 in the ultra-telephoto range. Figure 24 (b) is a schematic diagram of the optical lens 41 provided in Example 5 at the telephoto end. The optical lens 41 includes a first lens group G1, a second lens group G2, a third lens group G3, and a filter 421, which are sequentially distributed from the object side to the image side along the optical axis 410 of the optical lens 41. The first lens group G1 and the third lens group G3 are fixed lens groups with negative optical power, and the second lens group G2 is a movable lens group with positive optical power.

[0303] The first lens group G1 comprises a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged sequentially from the object side to the image side. The combined focal length LEF1 of the first lens group G1 is negative. The first lens L1 has an object-side surface S1 and an image-side surface S2. The second lens L2 has an object-side surface S3 and an image-side surface S4. The third lens L3 has an object-side surface S5 and an image-side surface S6. The fourth lens L4 has an object-side surface S7 and an image-side surface S8.

[0304] The second lens group G2 includes a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged sequentially from the object side to the image side. The combined focal length LEF2 of the second lens group G2 is positive. The fifth lens L5 has an object-side surface S9 and an image-side surface S10, the sixth lens L6 has an object-side surface S11 and an image-side surface S12, and the seventh lens L7 has an object-side surface S12 and an image-side surface S13.

[0305] The third lens group G3 includes an eighth lens L8 and a ninth lens L9 arranged sequentially from the object side to the image side. The combined focal length LEF3 of the third lens group G3 is negative. The eighth lens L8 has an object-side surface S14 and an image-side surface S15, and the ninth lens L9 has an object-side surface S16 and an image-side surface S17.

[0306] The filter 421 has an object side surface S18 and an image side surface S19.

[0307] like Figure 24 As shown, when the optical lens 41 switches from the ultra-telephoto mode to the telephoto mode, the second lens group G2 moves towards the object side along the optical axis 410. When the optical lens 41 switches from the telephoto mode to the ultra-telephoto mode, the second lens group G2 moves towards the image side along the optical axis 410.

[0308] Table 5a shows the design parameters for each lens and filter 421 in Example 5, where the Y-radius, thickness, focal length, and combined focal length are all in millimeters (mm), as shown below.

[0309] Table 5a

[0310]

[0311] It should be noted that Table 5a uses 555nm as the reference wavelength. In Table 5a, blank spaces indicate that there are no requirements for the numerical values; Infinity has infinite curvature, meaning that the surface is a plane. Thickness refers to the thickness of the optical element along the optical axis 410 or the thickness of the air gap between optical elements. The thickness corresponding to the row containing the object side of the first lens L1 is the thickness of the first lens L1 along the optical axis 410, and the thickness corresponding to the row containing the image side of the first lens L1 is the distance from the image side of the first lens L1 to the object side of the second lens L2 along the optical axis 410, and so on.

[0312] The sagitta of the aspherical surface in each of the above lens groups can be calculated using the following formula:

[0313]

[0314] Where z is a point on the aspherical surface at a distance r from the optical axis 410, and its relative distance to the tangent plane at the intersection point on the aspherical surface optical axis 410; r is the perpendicular distance between a point on the aspherical curve and the optical axis 410; c is the curvature of the fixed-point sphere on the aspherical surface; k is the conic coefficient; and α... i Let be an i-th order aspherical constant.

[0315] Table 5b lists the aspherical coefficients of each lens group in Example 5, as shown in the table below:

[0316] Table 5b

[0317]

[0318]

[0319] By employing the aforementioned lenses, and with the combination of optical parameters such as the number of lenses, focal length, thickness, refractive index, and Abbe number of each lens, the optical lens 41 can switch between telephoto and super telephoto ranges by moving the second lens group G2. This also enables the optical lens 41 to have features such as small size and the ability to achieve macro photography in each field of view. The optical parameters of the optical lens 41 composed of the aforementioned lenses can be found in Table 5c below.

[0320] Table 5c shows the basic parameters of optical lens 41 in Example 5, as follows:

[0321] Table 5c

[0322]

[0323] Wherein, MIC stands for Maximum image circle, which refers to the largest circular area that the optical lens 41 can form on the imaging plane 422a. Light rays exceeding this area will not be captured by the lens, thus affecting image quality. MIC = IMH * 2 + mechanical margin. MFOV is the mechanical field of view corresponding to MIC.

[0324] Table 5d shows the basic parameters of optical lens 41 in Example 5, as follows:

[0325] Table 5d

[0326] super telephoto telephoto LEF1+LEF2 / mm 18.68 9.17 LEF2+LEF3 / mm 10.70 12.22

[0327] Wherein, LEF1+LEF2 is the combined focal length of the first lens group G1 and the second lens group G2, and LEF2+LEF3 is the combined focal length of the second lens group G2 and the third lens group G3.

[0328] As shown in Tables 5b and 5c, in Example 5 of this application, the sum of d1 and d2 is 12.31 in the telephoto range and in the super telephoto range. From the super telephoto range to the telephoto range, the combined focal length of the first lens group G1 and the second lens group G2 decreases, while the combined focal length of the second lens group G2 and the third lens group G3 increases.

[0329] Based on the values ​​of the above parameters, it can be calculated that in this example:

[0330] TTL / FT=1.66; TTL / (IMH×2)=5.85; FT / FW=2.03;

[0331] |FT / LEF1|=1.94, |LEF1 / LEF2|=1.26.

[0332] As can be seen, the values ​​of each condition in this example are all within the aforementioned limits.

[0333] Please see Figure 25 As shown, Figure 25 This is a graph showing the astigmatism of light after it passes through the optical lens 41 in Example 5. Figure 25 (a) in Example 5 shows the astigmatism curve of optical lens 41 at the ultra-telephoto range. Figure 25Figure (b) shows the astigmatism curves of optical lenses 41 in Example 5 at the telephoto end. The horizontal axis represents focus shift, and the vertical axis represents image height, both in mm. The five sets of curves represent wavelengths of 435nm, 470nm, 555nm, 610nm, and 650nm. In each set, the solid line represents the focus shift curve in the meridional direction, and the dashed line represents the focus shift curve in the sagittal direction. Figure 25 As can be seen, in different wavelength bands, the focal shift of optical lens 4 in both the meridional and sagittal directions in the super telephoto range is controlled within the range of -0.02mm to 0.1mm, and in both the meridional and sagittal directions in the telephoto range is controlled within the range of -0.4mm to 0.1mm. The meridional and sagittal curves are quite close, which means that the astigmatism and field curvature of optical lens 41 in Example 5 are relatively small, and it can focus most of the light on the correct focus point, making the image clearer and sharper.

[0334] Please see Figure 26 As shown, Figure 26 This is a distortion curve of light after passing through optical lens 41 in Example 5. Figure 26 (a) in the figure is the distortion curve of light at the super telephoto end after passing through optical lens 41 in Example 5. Figure 26 (b) shows the distortion curve of light rays after passing through optical lens 41 in Example 5 at the telephoto end. The horizontal axis represents the distortion rate (%), and the vertical axis represents the image height (mm). The five curves represent wavelengths of 435nm, 470nm, 555nm, 610nm, and 650nm, respectively. Figure 26 As can be seen, the distortion rate is controlled within the range of -2% to 2%, which means that the image captured by the optical lens 41 in Example 5 has a small degree of distortion and low distortion.

[0335] It should be noted that in Examples 1 to 5 above, the first refractive element 411 and the second refractive element 412 are not shown, which does not constitute a limitation on this application. In actual design, reference can be made to... Figure 10 The method for setting the first refracting element 411 in the provided optical lens 41, and Figure 11 The setting method for the second refracting element 412 in the provided optical lens 41 is described in detail here.

[0336] The relevant parameters of the optical lens 41 in the above five examples are summarized below.

[0337] Please refer to Table 6, which is a table showing the optical power distribution of the lenses in each lens group of the optical lens 41 provided in the embodiments of this application.

[0338] Table 6

[0339] LEF1 LEF2 LEF3 LEF1 LEF2 LEF3 FOV1 FOV2 Example 1 Negative (+-) Positive (+-) Negative (+-+) -17.43 8.71 -42.09 28.89° 11.37° Example 2 Negative (+-) Positive (+-) Negative (+-) -17.89 9.36 -110.75 28.15° 11.07° Example 3 Negative (+-) Positive (+-) burden(--) -15.96 10.03 -33.67 27.62° 13.02° Example 4 Negative (--+) Positive (+++) Negative (-+-) -16.20 13.09 -56.23 34.31° 16.27° Example 5 Negative (---+) Positive (++) Negative (-+) -13.10 10.41 -62.81 32.44° 15.84°

[0340] In this diagram, "+" indicates a lens with positive optical power, and "-" indicates a lens with negative optical power. LEF1 is the combined focal length of the first lens group G1, LEF2 is the combined focal length of the second lens group G2, and LEF3 is the combined focal length of the third lens group G3. FOV1 is the field of view of optical lens 41 at the telephoto end, and FOV2 is the field of view of optical lens 41 at the telephoto end. It can be understood that the field of view of optical lens 41 at the ultra-telephoto end is smaller than that at the ultra-telephoto end. This allows for a wider field of view, encompassing more elements in the captured image.

[0341] As shown in Table 6, the first lens group G1, the second lens group G2, and the third lens group G3 each include at least two lenses; the first lens group G1 includes at least one lens with positive optical power and one lens with negative optical power; the second lens group G2 includes at least one lens with positive optical power; and the third lens group G3 includes at least one lens with negative optical power.

[0342] Please refer to Table 7, which is a parameter table of the combined focal length of the lens group in the optical lens 41 provided in the embodiments of this application.

[0343] Table 7

[0344]

[0345] Wherein, LEF1+LEF2 is the combined focal length of the first lens group G1 and the second lens group G2, and LEF2+LEF3 is the combined focal length of the second lens group G2 and the third lens group G3.

[0346] As shown in Table 6, the combined focal length of the first lens group G1 and the second lens group G2 is positive. When the second lens group G2 moves towards the image side along the optical axis 410, the combined focal length of the first lens group G1 and the second lens group G2 decreases. The combined focal length of the second lens group G2 and the third lens group G3 is positive. When the second lens group G2 moves towards the image side along the optical axis 410, the combined focal length of the second lens group G2 and the third lens group G3 increases.

[0347] Please refer to Table 8, a summary table of the air gaps between the lens groups in the optical lens 41 provided in this application embodiment.

[0348] Table 8

[0349]

[0350] Wherein, d1 is the air gap between the first lens group G1 and the second lens group G2, and d2 is the air gap between the second lens group G2 and the third lens group G3. H0 is the moving distance of the second lens group G2 when the optical lens 41 switches between the super telephoto and telephoto ranges. As shown in Table 8, the sum of d1 and d2 remains unchanged when the second lens group G2 moves along the optical axis 410. In the optical lens 41 provided in this application, H0 is greater than or equal to 7.5 mm and less than or equal to 10 mm.

[0351] Please refer to Table 9, which is a summary table of optical parameters of the optical lens 41 provided in the embodiments of this application.

[0352] Table 9

[0353]

[0354]

[0355] Where FW is the total effective focal length of the optical lens in the telephoto range, and FT is the total effective focal length of the optical lens in the super telephoto range. Fno1 is the aperture value of the optical lens in the telephoto range. Fno2 is the aperture value of the optical lens in the super telephoto range. IMH is the half-image height corresponding to the optical lens, and twice IMH is the diagonal size of the image sensor corresponding to the optical lens. TTL is the total optical length of the optical lens along its own optical axis 410.

[0356] FWeq represents the equivalent focal length of the optical lens in the telephoto range, and FTeq represents the equivalent focal length of the optical lens in the super-telephoto range. For optical lenses in electronic devices, the equivalent focal length = total effective focal length × equivalent coefficient = [SQRT(36×36+24×24) / (2×IMH)] × total effective focal length. Where SQRT(36×36+24×24) is the diagonal length of a full-frame camera, and [SQRT(36×36+24×24) / (2×IMH)] is the equivalent coefficient corresponding to the equivalent focal length of the optical lens 41 provided in this application. As shown in the table, the optical lens 41 provided in this application has an equivalent focal length of 60mm-87.5mm in the telephoto range and an equivalent focal length of 110mm-250mm in the super-telephoto range.

[0357] As shown in Table 9, the optical lenses provided in this application all satisfy the following relationship:

[0358] 0.95≤TTL / FT≤1.9; 4.8≤TTL / (IMH×2)≤6.5; 2.4≤Fno1≤3.5; 3.5≤Fno2≤4.8.

[0359] Please refer to Table 10, which shows the total effective focal length ratio of the optical lens 41 provided in the embodiments of this application in the super telephoto and telephoto ranges.

[0360] Table 10

[0361] FT / FW value Example 1 29.0 / 11.5 2.52 Example 2 30.0 / 11.8 2.54 Example 3 25 / 12.0 2.08 Example 4 24.7 / 11.8 2.09 Example 5 25.4 / 12.5 2.03

[0362] The definitions of FT and FW are the same as described above. From the calculation results in Table 10, it can be seen that the optical lenses 41 provided in the embodiments of this application all satisfy 2.0 ≤ FT / FW ≤ 2.6.

[0363] Please refer to Table 11, which is a calculation table of the ratio of the total effective focal length of the optical lens 41 in the ultra-telephoto range to the combined focal length of the first lens group G1 provided in the embodiments of this application.

[0364] Table 11

[0365] |FT / LEF1| value Example 1 |29.0 / -17.43| 1.66 Example 2 |30.0 / -17.89| 1.68 Example 3 |25.0 / -15.96| 1.57 Example 4 |24.7 / -16.20| 1.52 Example 5 |25.4 / -13.10| 1.94

[0366] Wherein, FT is the total effective focal length of the optical lens 41 in the ultra-telephoto range, and LEF1 is the combined focal length of the first lens group G1. From the calculation results in Table 11, it can be seen that the optical lenses 41 provided in the embodiments of this application all satisfy the relationship: 1.5 ≤ |FT / LEF1| ≤ 2.0.

[0367] Please refer to Table 12, which is a table for calculating the ratio of the combined focal length of the first lens group G1 to the combined focal length of the second lens group G2 in the optical lens 41 provided in the embodiments of this application.

[0368] Table 12

[0369]

[0370]

[0371] Wherein, LEF1 is the combined focal length of the first lens group G1, and LEF2 is the combined focal length of the second lens group G2. From the calculation results in Table 12, it can be seen that the optical lenses 41 provided in the embodiments of this application all satisfy the relationship: 1.2≤|LEF1 / LEF2|≤2.0.

[0372] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0373] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An optical lens, characterized in that, The optical lens includes a first lens group, a second lens group, and a third lens group arranged sequentially from the object side to the image side along the optical axis of the optical lens; The first lens group and the third lens group are fixed lens groups with negative optical power; The second lens group is a movable lens group with positive optical power; During the zoom process of the optical lens from the super telephoto range to the telephoto range, the second lens group moves along the optical axis from the first interval to the second interval, and the second interval is located on the image side of the first interval.

2. The optical lens according to claim 1, characterized in that, The first interval includes a first position and a second position, with the second position located on the image side of the first position. During the focusing process of the optical lens switching from a distant view to a close view, the second lens group moves from the first position to the second position.

3. The optical lens according to claim 1, characterized in that, The second interval includes a third position and a fourth position. The fourth position is located on the object side of the third position. During the focusing process of the optical lens switching from a distant view to a close view, the second lens group moves from the third position to the fourth position.

4. The optical lens according to claim 2, characterized in that, The optical lens satisfies the following relationship: H1 <H0; Wherein, H0 is the distance between the end of the first interval along the optical axis near the object side and the end of the second interval along the optical axis near the image side, and H1 is the distance between the first position and the second position.

5. The optical lens according to claim 3, characterized in that, The optical lens satisfies the following relationship: H2 <H0; Wherein, H0 is the distance between the end of the first interval along the optical axis near the object side and the end of the second interval along the optical axis near the image side, and H2 is the distance between the third position and the fourth position.

6. The optical lens according to any one of claims 2-5, characterized in that, The optical lens satisfies the following relationship: H1+H2≤H0; Wherein, H0 is the distance between the end of the first interval along the optical axis near the object side and the end of the second interval along the optical axis near the image side, H1 is the distance between the first position and the second position, and H2 is the distance between the third position and the fourth position.

7. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies the following relationship: 7.5mm≤H0≤10mm; Wherein, H0 is the distance the second lens group moves when it moves between the first interval and the second interval.

8. The optical lens according to any one of claims 1-7, characterized in that, The combined focal length of the first lens group and the second lens group is a positive value. When the second lens group moves along the optical axis toward the image side, the combined focal length of the first lens group and the second lens group decreases. The combined focal length of the second lens group and the third lens group is a positive value. When the second lens group moves along the optical axis toward the image side, the combined focal length of the second lens group and the third lens group increases.

9. The optical lens according to any one of claims 1-8, characterized in that, The first lens group, the second lens group, and the third lens group each include at least two lenses; the first lens group includes at least one lens with positive optical power and one lens with negative optical power, the second lens group includes at least one lens with positive optical power, and the third lens group includes at least one lens with negative optical power.

10. The optical lens according to any one of claims 1-9, characterized in that, The second lens group also includes an aperture stop, the center line of which coincides with the optical axis of the optical lens, and the aperture of the aperture stop remains unchanged when the second lens group moves along the optical axis.

11. The optical lens according to any one of claims 1-10, characterized in that, d1 is the air gap between the first lens group and the second lens group, and d2 is the air gap between the second lens group and the third lens group. When the second lens group moves along the optical axis, the sum of d1 and d2 remains unchanged.

12. The optical lens according to any one of claims 1-11, characterized in that, The optical lens satisfies the following relationship: 2.4 ≤ Fno1 ≤ 3.5; Wherein, Fno1 is the aperture value of the optical lens in the telephoto range.

13. The optical lens according to any one of claims 1-12, characterized in that, The optical lens satisfies the following relationship: 3.5≤Fno2≤4.8; Wherein, Fno2 is the aperture value of the optical lens in the super telephoto range.

14. The optical lens according to any one of claims 1-13, characterized in that, The optical lens satisfies the following relationship: 0.95≤TTL / FT≤1.9; Where TTL is the total optical length of the optical lens along its own optical axis, and FT is the total effective focal length of the optical lens in the ultra-telephoto range.

15. The optical lens according to any one of claims 1-14, characterized in that, The optical lens satisfies the following relationship: 4.8≤TTL / (IMH×2)≤6.5; Where TTL is the total optical length of the optical lens along its own optical axis, IMH is the half-image height corresponding to the optical lens, and twice IMH is the diagonal size of the image sensor corresponding to the optical lens.

16. The optical lens according to any one of claims 1-15, characterized in that, The optical lens satisfies the following relationship: 2.0 ≤ FT / FW ≤ 2.6; Wherein, FT is the total effective focal length of the optical lens in the ultra-telephoto range; FW is the total effective focal length of the optical lens in the telephoto range.

17. The optical lens according to any one of claims 1-16, characterized in that, The optical lens satisfies the following relationship: 1.5 ≤ |FT / LEF1| ≤ 2.0; Wherein, FT is the total effective focal length of the optical lens in the ultra-telephoto range; LEF1 is the combined focal length of the first lens group.

18. The optical lens according to any one of claims 1-17, characterized in that, The optical lens satisfies the following relationship: 1.2≤|LEF1 / LEF2|≤2.0; Wherein, LEF1 is the combined focal length of the first lens group; LEF2 is the combined focal length of the second lens group.

19. The optical lens according to any one of claims 1-18, characterized in that, The optical lens further includes a first refracting element located on the object side of the first lens group, which is used to deflect light to the optical lens.

20. The optical lens according to any one of claims 1-19, characterized in that, The optical lens further includes a second refracting element located on the image side of the third lens group, which is used to deflect light to the image sensor.

21. A camera module, characterized in that, include: An image sensor and an optical lens according to any one of claims 1 to 20, wherein the image sensor is disposed on the image side of the optical lens.

22. An electronic device, characterized in that, include: The housing and the camera module as described in claim 21; The housing has a light-transmitting opening; The camera module is disposed inside the housing, and the light-incident surface of the camera module faces the light-transmitting port.

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