Optical lens, camera module and electronic device

Abstract

The application relates to the technical field of optical lenses, and provides an optical lens, a camera module and electronic equipment, which can solve the problem that an optical lens occupies more internal space of electronic equipment in related technologies. The optical lens comprises a first lens group G1 with positive optical power and a second lens group G2 with negative optical power, the second lens group G2 is arranged on the image side of the first lens group G1; the optical lens has a short-focus state and a long-focus state; when the optical lens zooms between the short-focus state and the long-focus state, the first lens group G1 and the second lens group G2 can respectively move along the lens optical axis, and the distance between the first lens group G1 and the second lens group G2 changes; when the optical lens switches between the short-focus state and the long-focus state, the maximum value of the first moving distance of the first lens group G1 is less than or equal to 14 mm; and the maximum value of the second moving distance of the second lens group G2 is less than or equal to 20 mm. The application can be used on electronic equipment such as mobile phones.

Description

Technical Field

[0001] This application relates to the field of optical lens technology, and in particular to an optical lens, camera module and electronic device. Background Technology

[0002] Currently, optical lenses have become an important component of electronic devices. Through optical lenses, desired photos can be easily captured to meet people's photography needs. Initially, the optical lenses of electronic devices were all fixed-focus lenses, meaning that the focal length of the optical lens remained constant. These optical lenses were called fixed-focus lenses. As people's requirements for the image quality of electronic devices increased, fixed-focus lenses could no longer meet the requirements for shooting. Therefore, optical lenses with adjustable focal lengths (i.e., zoom lenses) came into being.

[0003] A zoom lens is an optical lens that allows you to change the focal length without changing your shooting position, enabling you to magnify or reduce the size of the object you are photographing. For example, when shooting distant objects, you can increase the focal length to bring the subject closer; when shooting a large scene, you can decrease the focal length to cover a wider area.

[0004] Zoom lenses are widely used in electronic devices such as mobile phones, tablets, and wearable devices. With the development of electronic technology, electronic devices are becoming increasingly thinner and lighter, requiring zoom lenses to have a smaller size to save internal space. Therefore, how to design zoom lenses to reduce their footprint within electronic devices has become an important issue in the industry. Summary of the Invention

[0005] Embodiments of this application provide an optical lens, a camera module, and an electronic device to solve the problem in related technologies where optical lenses occupy a large amount of internal space in electronic devices.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, embodiments of this application provide an optical lens comprising two lens groups, which constitute the entirety of the optical lens and are arranged along the optical axis of the lens. The two lens groups are a first lens group G1 with positive optical power and a second lens group G2 with negative optical power, the second lens group G2 being disposed on the image side of the first lens group G1. The optical lens has a short focal length state and a long focal length state. When the optical lens zooms between the short focal length state and the long focal length state, the first lens group G1 and the second lens group G2 can move along the optical axis of the lens respectively, and the distance between the first lens group G1 and the second lens group G2 changes. When the optical lens switches between the short focal length state and the long focal length state, the maximum value of the first moving distance of the first lens group G1 in the object-side direction or image-side direction toward the first lens group G1 is less than or equal to 20 mm; the maximum value of the second moving distance of the second lens group G2 in the object-side direction or image-side direction toward the second lens group G2 is less than or equal to 29 mm.

[0008] The optical lens in this embodiment has two lens groups. During zooming, both lens groups move along the optical axis of the optical lens, thus reducing the number of lens groups and simplifying the structure of the optical lens. This not only helps to reduce the size of the optical lens and thus reduce its footprint within the electronic device, but also helps to reduce the assembly complexity and improve manufacturing performance. By setting the maximum value of the first moving distance of the first lens group G1 to be less than or equal to 20mm, the moving stroke of the first lens group G1 is shortened. This not only helps to reduce the size of the drive motor of the first lens group G1, but also helps to reduce the overall length of the optical lens in the telephoto state, thereby reducing the size of the optical lens and thus reducing its footprint within the electronic device. By setting the maximum value of the second moving distance of the second lens group G2 to be less than or equal to 29mm, the moving stroke of the second lens group G2 is shortened. This helps to reduce the size of the drive motor of the second lens group G2, thereby helping to reduce the size of the optical lens and thus reducing its footprint within the electronic device.

[0009] In some embodiments of the first aspect, the first moving distance includes a first optical zoom moving distance q; the first optical zoom moving distance q is the moving distance of the first lens group G1 during the process of switching the optical lens from a short focal length state to a long focal length state when the optical lens is focusing on a distant scene; the first optical zoom moving distance q satisfies: q≤20mm. This setting helps to reduce the size of the drive motor of the first lens group G1, thereby reducing the size of the optical lens. At the same time, it enables the optical lens to achieve relatively fast optical zoom, which is very helpful for capturing fleeting moments or scenes that require rapid changes in shooting angle.

[0010] In some embodiments of the first aspect, 2.8mm ≤ q ≤ 6mm. This setting is beneficial for reducing the size of the optical lens and enabling the optical lens to achieve faster optical zoom; at the same time, it is also beneficial for reducing the precision requirements of the drive motor of the first lens group G1, thereby reducing the design and manufacturing costs of the drive motor of the first lens group G1.

[0011] In some embodiments of the first aspect, 12mm ≤ q ≤ 20mm. This setting is beneficial for reducing the size of the optical lens and enabling the optical lens to achieve relatively fast optical zoom; at the same time, it is also beneficial for reducing the precision requirements of the drive motor of the first lens group G1, thereby reducing the design and manufacturing costs of the drive motor of the first lens group G1.

[0012] In some embodiments of the first aspect, the first moving distance is equal to the first optical zoom moving distance q. This configuration simplifies the movement of the first lens group G1, not only simplifying the structure of the drive motor of the first lens group G1, but also preventing the first moving distance from being too large, thereby reducing the size of the optical lens.

[0013] In some embodiments of the first aspect, the effective focal length f of the first lens group G1 g1 The effective focal length f of the second lens group G2 g2 The effective focal length F and the optical power distribution ratio α of the optical lens satisfy: |(m1-m2)f g2 |≤20mm; where m1 is the focal length of the optical lens when it is in telephoto mode. The value of m2; m2 is the optical lens when in short focal length mode. The value of α; α = F / f g1 With this setup, by properly configuring F and f... g1 f g2 The size of the lens can control the first optical zoom movement distance q of the first lens group G1, thereby controlling the volume of the optical lens.

[0014] In some embodiments of the first aspect, 2.8mm ≤ |(m1-m2)f g2 |≤6mm. This setting not only helps to reduce the size of the optical lens and enables the optical lens to achieve faster optical zoom, but also helps to reduce the precision requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0015] In some embodiments of the first aspect, 12mm ≤ |(m1-m2)f g2|≤20mm. This setting not only helps to reduce the size of the optical lens and enables the optical lens to achieve relatively fast optical zoom, but also helps to reduce the precision requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0016] In some embodiments of the first aspect, the second moving distance includes a second optical zoom moving distance Δ1; the second optical zoom moving distance Δ1 is the moving distance of the second lens group G2 during the process of switching the optical lens from a short focal length state to a long focal length state when the optical lens is focusing on a distant scene; the second optical zoom moving distance Δ1 satisfies: Δ1≤27.6mm. This setting helps to reduce the size of the drive motor of the second lens group G2, thereby reducing the size of the optical lens. At the same time, it enables the optical lens to achieve relatively fast optical zoom, which is very helpful for capturing fleeting moments or scenes that require rapid changes in shooting angle.

[0017] In some embodiments of the first aspect, 3.9mm ≤ Δ1 ≤ 8.5mm. This setting not only helps to reduce the size of the optical lens and enables the optical lens to achieve faster optical zoom, but also helps to reduce the accuracy requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0018] In some embodiments of the first aspect, 17.4mm ≤ Δ1 ≤ 27.6mm. This setting not only helps to reduce the size of the optical lens and enables the optical lens to achieve relatively fast optical zoom, but also helps to reduce the accuracy requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0019] In some embodiments of the first aspect, the effective focal length f of the first lens group G1 g1 The effective focal length f of the second lens group G2 g2 The effective focal length F and the optical power distribution ratio α of the optical lens satisfy: |-nf g2 |≤27.6mm; where n is the difference between the value of α when the optical lens is in telephoto mode and the value of α when it is in telephoto mode; α=F / f g1 With this setup, by properly configuring F and f... g1 f g2 The size of the lens group G2 can control the second optical zoom movement distance Δ1, thereby controlling the size of the optical lens.

[0020] In some embodiments of the first aspect, 3.9mm ≤ |-nf g2|≤8.5mm. This setting not only helps to reduce the size of the optical lens and enables the optical lens to achieve faster optical zoom, but also helps to reduce the precision requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0021] In some embodiments of the first aspect, 17.4mm ≤ Δ1 ≤ 27.6mm. This setting not only helps to reduce the size of the optical lens and enables the optical lens to achieve relatively fast optical zoom, but also helps to reduce the accuracy requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0022] In some embodiments of the first aspect, when the optical lens is in telephoto or focal length mode, the first lens group G1 is fixed relative to the image plane of the optical lens along the lens optical axis, and the second lens group G2 is movable relative to the first lens group G1 along the lens optical axis, so that the optical lens can switch between focusing on distant and close-up objects. With this configuration, when the optical lens is in telephoto or focal length mode, it can capture both distant and close-up objects without changing the position of the optical lens, thereby expanding the shooting range of the optical lens.

[0023] In this context, focusing on a distant scene with an optical lens means that the lens can clearly image the subject at a first working distance. Focusing on a close scene with an optical lens means that the lens can clearly image the subject at a second working distance, which is shorter than the first working distance. In telephoto mode, the first working distance is the maximum working distance at which the lens can clearly image a subject, such as infinity, and the second working distance is the minimum working distance at which it can clearly image a subject, such as 91mm. In telephoto mode, the first working distance is the maximum object distance at which the lens can clearly image a subject, such as infinity, and the second working distance is the minimum object distance at which it can clearly image a subject, such as 46mm.

[0024] In some embodiments of the first aspect, the second moving distance includes a focusing moving distance Δ2, which is the moving distance of the second lens group G2 when the optical lens switches between focusing on a close-up and focusing on a distant object; when the optical lens is in telephoto mode, the focusing moving distance Δ2 satisfies: Δ2 ≤ 6.9mm. This setting helps to reduce the size of the drive motor of the second lens group G2, thereby reducing the size of the optical lens. At the same time, it enables the optical lens to achieve relatively fast focusing in telephoto mode, and the optical lens can quickly capture a clear image when shooting fast-moving objects.

[0025] In some embodiments of the first aspect, when the optical lens is in telephoto mode, the focusing distance Δ2 satisfies: 0.3mm ≤ Δ2 ≤ 2.6mm. This setting not only helps to reduce the size of the optical lens and enables the optical lens to achieve faster focusing, but also helps to reduce the accuracy requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0026] In some embodiments of the first aspect, when the optical lens is in telephoto mode, the focusing distance Δ2 satisfies: 2.5mm ≤ Δ2 ≤ 6.9mm. This setting not only helps to reduce the size of the optical lens and enables the optical lens to achieve relatively fast focusing, but also helps to reduce the accuracy requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0027] In some embodiments of the first aspect, the second moving distance includes a focusing moving distance Δ2, which is the moving distance of the second lens group G2 when the optical lens switches between focusing on a close-up and focusing on a distant object. When the optical lens is in a short focal length state, the focusing moving distance Δ2 satisfies: Δ2 ≤ 3.9 mm. This setting helps to reduce the size of the drive motor of the second lens group G2, thereby reducing the size of the optical lens. At the same time, it enables the optical lens to achieve relatively fast focusing in a long focal length state, and the optical lens can quickly capture a clear image when shooting fast-moving objects.

[0028] In some embodiments of the first aspect, when the optical lens is in a short focal length state, the focusing movement distance Δ2 satisfies: 0.65mm ≤ Δ2 ≤ 1.1mm. This setting not only helps to reduce the size of the optical lens and enables the optical lens to achieve faster focusing, but also helps to reduce the accuracy requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0029] In some embodiments of the first aspect, when the optical lens is in a short focal length state, the focusing movement distance Δ2 satisfies: 1.0mm ≤ Δ2 ≤ 3.9mm. This setting not only helps to reduce the size of the optical lens and enables the optical lens to achieve relatively fast focusing, but also helps to reduce the accuracy requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0030] In some embodiments of the first aspect, when the optical lens is in a short focal length state and focusing on a distant scene, the back focal length BFL of the optical lens satisfies: BFL ≥ 0.8 mm. This setting can significantly reduce the risk of the second lens group G2 colliding with its image-side optical elements during internal focusing.

[0031] In some embodiments of the first aspect, when the optical lens is in a short focal length state and focusing on a distant scene, the back focal length BFL of the optical lens satisfies: BFL ≥ 4mm. This setting can significantly reduce the risk of the second lens group G2 colliding with its image-side optical elements during internal focusing.

[0032] In some embodiments of the first aspect, when the optical lens is in a short focal length state and focusing on a distant scene, the back focal length (BFL) of the optical lens satisfies: BFL ≤ 4.5mm. This setting can avoid the camera module from being too large, thereby facilitating the miniaturization of the camera module.

[0033] In some embodiments of the first aspect, the optical lens is in a short focal length state, and when focusing on close-up objects, the back focal length BFL of the optical lens satisfies: BFL ≥ 0.15mm. This setting can prevent the second lens group G2 from colliding with its image-side optical elements under the action of external forces (such as the inertial force generated when an electronic device is dropped).

[0034] In some embodiments of the first aspect, the optical lens is in a short focal length state, and when focusing on a close-up object, the back focal length (BFL) of the optical lens satisfies: BFL ≥ 0.32 mm. This setting allows for more sufficient safety space on the image side of the second lens group G2, preventing the second lens group G2 from colliding with its image-side optical elements under external force.

[0035] In some embodiments of the first aspect, the optical lens is in a short focal length state, and when focusing on close-up objects, the back focal length (BFL) of the optical lens satisfies: BFL ≤ 0.7mm. This avoids the camera module from becoming too large, thereby facilitating the miniaturization of the camera module.

[0036] In some embodiments of the first aspect, the optical lens is in telephoto mode, and when focusing on a distant scene, the back focal length (BFL) of the optical lens satisfies: BFL ≥ 8.3 mm. This setting can significantly reduce the risk of the second lens group G2 colliding with its image-side optical elements during internal focusing.

[0037] In some embodiments of the first aspect, when the optical lens is in telephoto mode and focusing on a distant scene, the back focal length (BFL) of the optical lens satisfies: BFL ≥ 20mm. This setting can significantly reduce the risk of the second lens group G2 colliding with its image-side optical elements during optical zoom and internal focusing.

[0038] In some embodiments of the first aspect, the optical lens is in a telephoto state, and when focusing on a distant scene, the back focal length (BFL) of the optical lens satisfies: BFL ≤ 29mm. This setting avoids the camera module from becoming too large, thereby facilitating the miniaturization of the camera module.

[0039] In some embodiments of the first aspect, the optical lens is in a telephoto state, and when focusing on a close-up, the back focal length (BFL) of the optical lens satisfies: BFL ≥ 7mm. This setting can prevent the second lens group G2 from colliding with its image-side optical elements under the action of external forces (such as the inertial force generated when an electronic device is dropped).

[0040] In some embodiments of the first aspect, when the optical lens is in telephoto mode and focusing on a close-up object, the back focal length (BFL) of the optical lens satisfies: BFL ≥ 15mm. This setting allows for more sufficient safety space on the image side of the second lens group G2, preventing the second lens group G2 from colliding with its image-side optical elements under external force.

[0041] In some embodiments of the first aspect, the optical lens is in a telephoto state, and when focusing on close-up objects, the back focal length (BFL) of the optical lens satisfies: BFL ≤ 22.3mm. This setting avoids the camera module from becoming too large, thereby facilitating the miniaturization of the camera module.

[0042] In some embodiments of the first aspect, when the optical lens is in a short focal length state and focusing on a close-up object, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥5.1mm. This setting can significantly reduce the risk of collision between the second lens group G2 and the first lens group G1.

[0043] The gap width δ between the second lens group G2 and the first lens group G1 refers to the width of the gap between the second lens group G2 and the first lens group G1 on the optical axis of the lens.

[0044] In some embodiments of the first aspect, when the optical lens is in a short focal length state and focusing on a close-up object, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥7.1mm. This setting can significantly reduce the risk of collision between the second lens group G2 and the first lens group G1.

[0045] In some embodiments of the first aspect, the optical lens is in a short focal length state, and when focusing on a close-up scene, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≤9.2mm. This setting can avoid the camera module from being too large, thereby facilitating the miniaturization of the camera module.

[0046] In some embodiments of the first aspect, when the optical lens is in a short focal length state and focusing on a distant scene, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥1.3mm. This setting can prevent the second lens group G2 from colliding with the first lens group G1 under the action of external forces (such as the inertial force generated when an electronic device is dropped).

[0047] In some embodiments of the first aspect, when the optical lens is in a short focal length state and focusing on a distant object, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥5mm. This configuration provides sufficient safety space between the second lens group G2 and the first lens group G1, preventing collisions between them under external forces.

[0048] In some embodiments of the first aspect, when the optical lens is in a short focal length state and focusing on a distant scene, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≤8.1mm. This setting can avoid the camera module from being too large, thereby facilitating the miniaturization of the camera module.

[0049] In some embodiments of the first aspect, when the optical lens is in telephoto mode and focusing on a close-up object, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥1mm. This setting can significantly reduce the risk of collision between the second lens group G2 and the first lens group G1.

[0050] In some embodiments of the first aspect, when the optical lens is in telephoto mode and focusing on a close-up object, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ ≥ 3.3 mm. This setting can significantly reduce the risk of collision between the second lens group G2 and the first lens group G1.

[0051] In some embodiments of the first aspect, when the optical lens is in telephoto mode and focusing on a close-up object, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≤7.3mm. This setting can avoid the camera module from being too large, thereby facilitating the miniaturization of the camera module.

[0052] In some embodiments of the first aspect, when the optical lens is in a telephoto state and focusing on a distant scene, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥0.26mm. This setting can prevent the second lens group G2 from colliding with the first lens group G1 under the action of external forces (such as the inertial force generated when an electronic device is dropped).

[0053] In some embodiments of the first aspect, when the optical lens is in telephoto mode and focusing on a distant object, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥0.36mm. This configuration provides sufficient safety space between the second lens group G2 and the first lens group G1, preventing collisions between them under external forces.

[0054] In some embodiments of the first aspect, when the optical lens is in telephoto mode and focusing on a distant scene, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≤0.68mm. This setting can avoid the camera module from being too large, thereby facilitating the miniaturization of the camera module.

[0055] In some embodiments of the first aspect, the minimum value of the focusing stroke compression ratio ξ min α, the power distribution ratio, F, the effective focal length of the optical lens, and f, the effective focal length of the first lens group G1 g1 Satisfy: 0.8≤ξ min =|1-α 2 |≤6.3; where α=F / f g1 This configuration reduces the focusing distance Δ2 of the second lens group G2, which helps to reduce the size of the drive motor for the second lens group G2; it also avoids the focusing distance Δ2 of the second lens group G2 being too short, thus reducing the accuracy requirements of the drive motor for the second lens group G2.

[0056] In some embodiments of the first aspect, the minimum value ξ of the focusing stroke compression ratio is achieved when the optical lens is in a short focal length state. min Satisfy: 0.8≤ξ min ≤2.1. This setting is beneficial for reducing the size of the drive motor of the second lens group G2, and also reduces the accuracy requirements of the drive motor of the second lens group G2.

[0057] In some embodiments of the first aspect, the minimum value ξ of the focus stroke compression ratio is achieved when the optical lens is in a telephoto position. min Satisfy: 3.0≤ξ min ≤6.3. This setting not only helps to reduce the size of the drive motor of the second lens group G2, but also reduces the accuracy requirements of the drive motor of the second lens group G2.

[0058] In some embodiments of the first aspect, the optical power distribution ratio α, the effective focal length F of the optical lens, and the effective focal length f of the first lens group G1 are... g1 Satisfy: 1.3≤α=F / f g1≤2.7. This setting can reduce the focusing movement distance Δ2 of the second lens group G2, which is beneficial to reducing the size of the drive motor of the second lens group G2; it can also avoid the focusing movement distance Δ2 of the second lens group G2 being too short, which would reduce the accuracy requirements of the drive motor of the second lens group G2.

[0059] In some embodiments of the first aspect, when the optical lens is in a short focal length state, the optical power distribution ratio α satisfies: 1.36 ≤ α ≤ 1.75. This setting is beneficial for reducing the size of the drive motor of the second lens group G2 and also reduces the accuracy requirements of the drive motor of the second lens group G2.

[0060] In some embodiments of the first aspect, when the optical lens is in telephoto mode, the optical power distribution ratio α satisfies: 1.97 ≤ α ≤ 2.69. This setting is beneficial for reducing the size of the drive motor of the second lens group G2 and also reduces the accuracy requirements of the drive motor of the second lens group G2.

[0061] In some embodiments of the first aspect, when the optical lens is in a short focal length state, the optical power distribution ratio α, the effective focal length F of the optical lens, and the effective focal length f of the first lens group G1 are... g1 The effective focal length f of the second lens group G2 g2 satisfy: in, α=F / f g01 With this setup, the optical lens can achieve closer shooting at short focal lengths, allowing it to capture details of objects at closer distances and thus improving image quality at such close ranges.

[0062] In some embodiments of the first aspect, when the optical lens is in a short focal length state, the minimum focusing distance U of the optical lens is... 1min ′ Satisfy: U 1min ≥45mm. This setting avoids the minimum focusing distance U of the optical lens when it is in a short focal length state. 1min The smaller the angle, the easier it is to design the optical lens.

[0063] In some embodiments of the first aspect, the optical lens satisfies the following relationship: 1.2 ≤ Г max ≤2.0; where Г max The maximum optical zoom ratio is the maximum ratio of the effective focal length of the optical lens in telephoto mode to the maximum effective focal length in telephoto mode when focusing on a distant scene. This setting not only helps to reduce the size of the optical lens, facilitating its miniaturization design, but also improves the magnification of the optical lens in telephoto mode, thus enabling the clear rendering of details in distant scenes.

[0064] In some embodiments of the first aspect, 1.2 ≤ j ≤ 2.0; where j is the ratio of the α value when the optical lens is in telephoto mode to the α value when it is in telephoto mode, when the optical lens is focused on a distant scene; α = F / f g1 F is the effective focal length of the optical lens, f g1 This is the effective focal length of the first lens group G1. With this setup, the maximum optical zoom ratio Γ can be controlled by appropriately adjusting the value of α. max The maximum and minimum values ​​can be used to control the size of the optical lens and the magnification of the optical lens in telephoto mode.

[0065] In some embodiments of the first aspect, the optical lens satisfies the following relationship: 1.7≤Г′ max ≤2.2; where, Г′ max The maximum system zoom ratio is the ratio of the maximum effective focal length to the minimum effective focal length of the optical lens. This setting not only helps to reduce the size of the optical lens, facilitating its miniaturization, but also improves the magnification of the optical lens in telephoto mode, thus enabling the clear rendering of details in distant scenes.

[0066] In some embodiments of the first aspect, 1.7 ≤ Fno ≤ 4.1; Fno is the aperture number of the optical lens. This setting not only ensures the amount of light entering the optical lens to guarantee the imaging quality of the optical lens in low-light environments, but also facilitates the correction of aberrations such as spherical aberration, coma, and chromatic aberration of the optical lens, thereby improving the imaging quality of the optical lens.

[0067] In some embodiments of the first aspect, 3.5 ≤ ImgH ≤ 8.3; ImgH is the image height of the optical lens. This setting not only ensures that the photosensitive element can capture more detailed information about the subject, which is beneficial to improving the imaging resolution and field of view of the optical lens, but also avoids the camera module from becoming too large.

[0068] In some embodiments of the first aspect, the first lens group G1 contains three lenses: a first lens L11 with positive optical power, a second lens L12 with negative optical power, and a third lens L13 with positive optical power, with the second lens L12 positioned between the first lens L11 and the third lens L13. The second lens group G2 contains three lenses: a fourth lens L21 with negative optical power, a fifth lens L22 with positive optical power, and a sixth lens L23 with negative optical power, with the fifth lens L22 positioned between the fourth lens L21 and the sixth lens L23. This arrangement reduces the number of lenses in the optical lens, simplifying its structure and reducing its size. Simultaneously, it allows for further correction of aberrations, thereby improving the image quality of the optical lens.

[0069] In some embodiments of the first aspect, the first lens group G1 contains three lenses: a first lens L11 with positive optical power, a second lens L12 with positive optical power, and a third lens L13 with positive optical power; the second lens group G2 contains two lenses: a fourth lens L21 with negative optical power and a fifth lens L22 with negative optical power. This arrangement reduces the number of lenses in the optical lens, simplifying its structure and reducing its size. Simultaneously, it allows for further correction of aberrations, thereby improving the image quality of the optical lens.

[0070] In some embodiments of the first aspect, the optical lens further includes a first optical path reversing element disposed on the object side of the first lens group G1. This configuration allows the first optical path reversing element to revers the optical path of the optical lens, thereby reducing the size of the optical lens in the thickness direction Z of the electronic device.

[0071] In some embodiments of the first aspect, the optical lens further includes a first optical path reversing element disposed between the first lens group G1 and the second lens group G2. This arrangement reduces the size of the optical lens along the optical axis of the second lens group G2 to accommodate the structural layout requirements of electronic devices (the optical lens is well-suited for electronic devices with limited space along the optical axis of the second lens group G2); additionally, it also facilitates increasing the length of the optical path between the first lens group G1 and the second lens group G2, optimizing the propagation path of light between them, thereby aiding in the correction of optical lens aberrations.

[0072] In some embodiments of the first aspect, the optical lens further includes a first optical path reversing element and a second optical path reversing element; the first optical path reversing element is disposed on the object side of the first lens group G1; and the second optical path reversing element is disposed on the image side of the second lens group G2. This configuration allows for reversal of the optical path of the optical lens, thereby reducing the size of the optical lens in the optical axis direction of the second lens group G2; simultaneously, it facilitates control over the size of the photosensitive surface (i.e., the image plane) of the photosensitive element in the direction parallel to the optical axis of the second lens group G2, allowing the photosensitive surface of the photosensitive element to be designed to be larger, thus reducing the space occupied by the photosensitive element in the thickness direction of the electronic device.

[0073] In some embodiments of the first aspect, the optical lens further includes a first optical path reversing element and a second optical path reversing element; the first optical path reversing element is disposed on the object side of the first lens group G1; the second optical path reversing element is disposed between the first lens group G1 and the second lens group G2. This arrangement is beneficial for increasing the length of the optical path between the first lens group G1 and the second lens group G2, and can optimize the propagation path of light between the first lens group G1 and the second lens group G2, thereby facilitating the correction of aberrations in the optical lens.

[0074] Secondly, embodiments of this application provide a camera module, including a photosensitive element and the optical lens described in the first aspect, wherein the photosensitive element is disposed on the image side of the optical lens.

[0075] The beneficial effects of the camera module in this embodiment are the same as those of the optical lens in the first aspect, and will not be repeated here.

[0076] In some embodiments of the second aspect, the effective light-sensitive area S1 of the photosensitive element when the optical lens is in telephoto mode and the effective light-sensitive area S2 of the photosensitive element when the optical lens is in short-focal-length mode satisfy: S1≤S2. This setting not only improves the imaging quality of the optical lens but also allows for better control of depth of field.

[0077] Thirdly, embodiments of this application provide an electronic device, including a housing and the camera module described in the second aspect, wherein the camera module is mounted on the housing.

[0078] The beneficial effects of the electronic device in this embodiment are the same as those of the optical lens in the first aspect, and will not be repeated here.

[0079] In some embodiments of the third aspect, the electronic device is a mobile phone, a tablet computer, or a wearable device. Attached Figure Description

[0080] Figure 1a A schematic diagram defining the image-side principal plane and image-side principal point of an optical system;

[0081] Figure 1b A schematic diagram defining the object-side principal plane and object-side principal point of an optical system;

[0082] Figure 1c A schematic diagram illustrating the definitions of object distance and image distance in an optical system;

[0083] Figure 2a This is a schematic diagram of the back of an electronic device (mobile phone) in some embodiments of this application;

[0084] Figure 2b for Figure 2a A cross-sectional view of the electronic equipment in the picture;

[0085] Figure 3 This is a state diagram of the camera module in the first embodiment of this application (the optical lens is in a short focal length state);

[0086] Figure 4 This is the second state diagram of the camera module in the first embodiment of this application (the optical lens is in telephoto mode);

[0087] Figure 5 This is a schematic diagram illustrating the zoom and focus principle of the optical lens in the camera module according to the first embodiment of this application.

[0088] Figure 6 This is an optical schematic diagram illustrating the switching principle between short focal length and long focal length states of the optical lens in the first embodiment of this application.

[0089] Figure 7 This is a schematic diagram illustrating the focusing principle of the optical lens in the first embodiment of this application in a short focal length state.

[0090] Figure 8 This is a schematic diagram of the camera module in the second embodiment of this application;

[0091] Figure 9 This is a schematic diagram of the camera module in the third embodiment of this application;

[0092] Figure 10 This is a schematic diagram of the camera module in the fourth embodiment of this application;

[0093] Figure 11 This is a schematic diagram of the camera module in the fifth embodiment of this application;

[0094] Figure 12a This is a state diagram of the optical lens of the camera module in the focusing and zooming process in the sixth embodiment of this application;

[0095] Figure 12b The effective focal length of the optical lens in the sixth embodiment of this application and the optical zoom movement of the first lens group G1 and the second lens group G2

[0096] Figure 12c This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens in the short focal length state in the sixth embodiment of this application.

[0097] Figure 12d This is a graph showing the relationship between the effective focal length of the optical lens and the object distance during focusing in a short focal length state in the sixth embodiment of this application.

[0098] Figure 12e This is the axial spherical aberration curve of the optical lens in the sixth embodiment of this application when it is in a short focal length state;

[0099] Figure 12f The field curvature and optical distortion curves of the optical lens in the sixth embodiment of this application when in a short focal length state;

[0100] Figure 12g The axial spherical aberration curve of the optical lens in the sixth embodiment of this application when in telephoto mode;

[0101] Figure 12h The field curvature curve and distortion curve of the optical lens in the sixth embodiment of this application when in telephoto mode;

[0102] Figure 13a This is a state diagram of the optical lens of the camera module in the seventh embodiment of this application during the focusing and zooming process;

[0103] Figure 13b This is a graph showing the relationship between the effective focal length of the optical lens and the optical zoom movement distance of the first lens group G1 and the second lens group G2 in the seventh embodiment of this application.

[0104] Figure 13c This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens in the short focal length state in the seventh embodiment of this application.

[0105] Figure 13d This is a graph showing the relationship between the effective focal length of the optical lens and the object distance during focusing in a short focal length state in the seventh embodiment of this application.

[0106] Figure 13e This is the axial spherical aberration curve of the optical lens in the seventh embodiment of this application when it is in a short focal length state;

[0107] Figure 13fThe field curvature and optical distortion curves of the optical lens in the seventh embodiment of this application when it is in a short focal length state;

[0108] Figure 13g This is the axial spherical aberration curve of the optical lens in the seventh embodiment of this application when it is in a telephoto state;

[0109] Figure 13h The field curvature curve and distortion curve of the optical lens in the seventh embodiment of this application when in telephoto mode;

[0110] Figure 14a This is a state diagram of the optical lens of the camera module in the eighth embodiment of this application during the focusing and zooming process;

[0111] Figure 14b This is a graph showing the relationship between the effective focal length of the optical lens and the optical zoom movement distance of the first lens group G1 and the second lens group G2 in the eighth embodiment of this application.

[0112] Figure 14c This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens in the short focal length state in the eighth embodiment of this application.

[0113] Figure 14d This is a graph showing the relationship between the effective focal length of the optical lens and the object distance during focusing in a short focal length state in the eighth embodiment of this application.

[0114] Figure 14e This is the axial spherical aberration curve of the optical lens in the eighth embodiment of this application when it is in a short focal length state;

[0115] Figure 14f The field curvature and optical distortion curves of the optical lens in the eighth embodiment of this application when it is in a short focal length state;

[0116] Figure 14g This is the axial spherical aberration curve of the optical lens in the eighth embodiment of this application when it is in a telephoto state;

[0117] Figure 14h The field curvature curve and distortion curve of the optical lens in the eighth embodiment of this application when in telephoto mode;

[0118] Figure 15a This is a state diagram of the optical lens of the camera module in the focusing and zooming process in the ninth embodiment of this application;

[0119] Figure 15b This is a graph showing the relationship between the effective focal length of the optical lens and the optical zoom movement distance of the first lens group G1 and the second lens group G2 in the ninth embodiment of this application.

[0120] Figure 15c This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens in the short focal length state in the ninth embodiment of this application.

[0121] Figure 15d This is a graph showing the relationship between the effective focal length of the optical lens and the object distance during focusing in a short focal length state in the ninth embodiment of this application.

[0122] Figure 15e This is the axial spherical aberration curve of the optical lens in the ninth embodiment of this application when it is in a short focal length state;

[0123] Figure 15f The field curvature and optical distortion curves of the optical lens in the ninth embodiment of this application when in a short focal length state;

[0124] Figure 15g This is the axial spherical aberration curve of the optical lens in the ninth embodiment of this application when it is in a telephoto state;

[0125] Figure 15h The field curvature and distortion curves of the optical lens in the ninth embodiment of this application when in telephoto mode;

[0126] Figure 16a This is a state diagram of the optical lens of the camera module in the focusing and zooming process in the tenth embodiment of this application;

[0127] Figure 16b This is a graph showing the relationship between the effective focal length of the optical lens and the optical zoom movement distance of the first lens group G1 and the second lens group G2 in the tenth embodiment of this application.

[0128] Figure 16c This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens in the short focal length state in the tenth embodiment of this application.

[0129] Figure 16d This is a graph showing the relationship between the effective focal length of the optical lens and the object distance during focusing in a short focal length state in the tenth embodiment of this application.

[0130] Figure 16e This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens in the telephoto state in the tenth embodiment of this application.

[0131] Figure 16f This is a graph showing the relationship between the effective focal length of the optical lens and the object distance during the focusing process of the optical lens in the telephoto state in the tenth embodiment of this application.

[0132] Figure 16g This is the axial spherical aberration curve of the optical lens in the tenth embodiment of this application when it is in a short focal length state;

[0133] Figure 16h The field curvature and optical distortion curves of the optical lens in the tenth embodiment of this application when in a short focal length state;

[0134] Figure 16i The axial spherical aberration curve of the optical lens in the tenth embodiment of this application when in telephoto mode;

[0135] Figure 16j The field curvature curve and distortion curve of the optical lens in the tenth embodiment of this application when in telephoto mode. Detailed Implementation

[0136] The technical terms used in the embodiments of this application are explained and described below.

[0137] Optical power, expressed as the reciprocal of the image-side focal length (approximately assuming the refractive index of air is 1), characterizes the ability of an optical lens to deflect light. Lenses or lens groups with positive optical power have a positive focal length and converge light rays. Lenses or lens groups with negative optical power have a negative focal length and diverge light rays.

[0138] A positive lens, also known as a converging lens or convex lens, has the function of converging light rays. Convex lenses are classified into biconvex, plano-convex, and concave-convex (or positive meniscus) types.

[0139] A negative lens, also known as a diverging lens or concave lens, has the effect of diverging light. Concave lenses are classified into biconcave, plano-concave, and convex-concave types.

[0140] The optical axis refers to the axis of symmetry of an optical system. For example, the optical axis of an optical lens is the axis that passes through the center of each optical element of the optical lens. The optical axis also refers to the center line of a light beam (light column). The optical properties of the light beam do not change when it rotates around this axis.

[0141] Focal length is a measure of the convergence or divergence of light in an optical system. Focal length is divided into image-side focal length and object-side focal length. Image-side focal length is the distance from the image-side principal plane to the image-side focal point; similarly, object-side focal length is the distance from the object-side principal plane to the object-side focal point. In the embodiments of this application, the focal length, effective focal length (EFL), and combined focal length all refer to image-side focal length.

[0142] Effective focal length, such as Figure 1a As shown, this refers to the distance from the image-side principal plane to the image-side focal point of the optical system.

[0143] The principal plane of an optical system, also known as the principal plane, includes the image-side principal plane and the object-side principal plane. When parallel light shines on the optical system, it is refracted and passes through the focal point on the image side. After refraction, the light rays are extended backward and intersect the incident light rays at a point. The plane perpendicular to the optical axis through this point is the image-side principal plane, and the point where the image-side principal plane intersects the optical axis of the optical system is the image-side principal point. Similarly, light emitted from the object-side focal point becomes parallel light after refraction. The extended incident light rays intersect the parallel light rays at a point, and the plane perpendicular to the optical axis through this point is the object-side principal plane. The point where the object-side principal plane intersects the optical axis of the optical system is the object-side principal point.

[0144] The position of the principal plane of an optical system can be determined using optical tracing methods. For example, by tracing light rays parallel to the optical axis in the paraxial region of the optical system, the position and focal length of the principal plane in that region can be calculated. Figure 1a As shown, AB is an incident ray parallel to the optical axis. After passing through the optical system, the outgoing ray E'F' intersects the optical axis at F'. According to the imaging theory of ideal optical systems, F' is the image point of the object point on the infinity axis, called the image-side focal point. If the incident ray AB and the outgoing ray E'F' are extended respectively, the two rays must intersect at a point, let this point be Q'. Draw a plane perpendicular to the optical axis through Q' that intersects the optical axis at point H'. Then H' is called the image-side principal point, the Q'H' plane is called the image-side principal plane, and the distance from the image-side principal plane Q'H' to the focal point F' is called the image-side focal length (also called the effective focal length).

[0145] like Figure 1b As shown, F is called the object-side focal point. Let the extension of the incident ray emitted from the focal point F intersect the extension of the corresponding outgoing ray parallel to the optical axis at point Q. Draw a plane perpendicular to the optical axis through point Q and intersect the optical axis at point H. Point H is called the object-side principal point of the optical system, and the QH plane is called the object-side principal plane. The distance between the object-side principal plane QH and the object-side focal point F is called the object-side focal length.

[0146] Object distance refers to the distance from the object plane to the object-side principal plane of the optical system, such as... Figure 1c As shown.

[0147] Image distance refers to the distance from the image plane to the principal plane of an optical system, such as... Figure 1c As shown.

[0148] Working distance refers to the distance between the front surface of the optical system (i.e., the surface closest to the object) and the object surface.

[0149] The optical system mentioned above can be a single lens (or other optical element), a lens group formed by multiple lenses, or a system formed by multiple lens groups (such as an optical lens).

[0150] Focusing specifically refers to adjusting the position of the lens group (i.e., the focusing lens group) in the optical lens to control the image distance, so that the image plane of the optical lens falls on the photosensitive element, thereby making the image of the optical lens as clear as possible.

[0151] Focusing travel refers to the distance the focusing lens group moves during the focusing process of an optical lens. For example, when an optical lens switches from focusing on a distant scene to focusing on a close-up scene, the distance the focusing lens group moves along the optical axis is the focusing travel.

[0152] The image plane is located on the image side of all lenses in an optical lens, where light rays pass through each lens in sequence to form an image.

[0153] An aperture stop is a physical object in an optical system that limits the beam of light. An aperture stop can be the edge of a lens, a frame, or a specially designed perforated screen. The function of an aperture stop can be twofold: to limit the beam of light or to limit the size of the field of view (imaging range). The aperture stop that limits the beam of light the most in an optical system is called the aperture stop, and the aperture stop that limits the field of view (size) the most is called the field stop.

[0154] The pupil is the image of the aperture stop. The conjugate image of the aperture stop through the optical system in front of the aperture stop is called the entrance pupil, or simply the entrance pupil. The diameter of the entrance pupil is the same as the diameter of the entrance pupil.

[0155] Relative aperture is the ratio of entrance pupil diameter D to image-side focal length fˊ, denoted as RA, i.e., RA = D / fˊ.

[0156] The F-number (Fno or F / #) is the reciprocal of the relative aperture, i.e., F = fˊ / D; the smaller the F-number, the larger the aperture and the shallower the depth of field; conversely, the larger the F-number, the smaller the aperture and the greater the depth of field.

[0157] Total track length (TTL) refers to the total length from the surface of the optical lens closest to the object side to the image plane.

[0158] ImgH (Image Height) represents half the diagonal length of the effective photosensitive area on the image sensor, also known as the image height.

[0159] The Abbe number, also known as the dispersion coefficient, is the ratio of the difference in refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material.

[0160] Aberration is the deviation between the image formed by an uncorrected optical system and the image formed by an ideal optical system. Aberrations include spherical aberration, coma, field curvature, astigmatism, distortion, and chromatic aberration.

[0161] Spherical aberration is a wide beam aberration. When a concentric beam of light emitted from an on-axis point passes through an optical system, it is no longer concentric. Light rays at different incident heights intersect the optical axis at different positions after passing through the system, resulting in varying degrees of deviation from the paraxial image point (ideal image point). This deviation is called axial spherical aberration, or simply spherical aberration. Due to spherical aberration, the image point on the Gaussian image plane is no longer a point, but a circular spot of confusion. The radius of this spot of confusion is called transverse spherical aberration.

[0162] Coma is an aberration of wide beams at off-axis points. In an optical system with coma, the image point formed by an off-axis object point on the ideal image plane resembles a comet-shaped spot. The narrow beams close to the principal ray intersect the principal ray to form a bright spot, while the image points formed by beams of different apertures far from the principal ray are different rings far from the principal ray. Therefore, this imaging defect is called coma.

[0163] Chromatic aberration (CA) occurs because optical materials have different refractive indices for different wavelengths of light. Therefore, light rays of different colors passing through the same aperture will intersect the optical axis at different points. Similarly, light rays of different colors passing through different apertures will also intersect the optical axis at different points. This results in the image of an object point appearing as a colored diffuse spot at any image plane position. The difference in the imaging position and size between various colors of light is called chromatic aberration. There are two types of chromatic aberration: axial chromatic aberration and transverse chromatic aberration.

[0164] Axial chromatic aberration: The difference in the imaging position of two colors of light at a point on the axis is called positional chromatic aberration, also known as axial chromatic aberration.

[0165] Transverse chromatic aberration: The same medium has different refractive indices for different colors of light; therefore, for an off-axis object point, the transverse magnification of different colors of light is not equal.

[0166] This difference is called vertical color difference, also known as magnification color difference.

[0167] Distortion, also known as distortion, is the difference between the height of the intersection point between the principal ray of different fields of view and the Gaussian image plane after passing through the optical lens and the ideal image height.

[0168] Field curvature is used to describe the difference along the optical axis between the position of the sharpest image point after rays from the off-center field of view pass through the optical lens group and the position of the sharpest image point in the central field of view. When field curvature exists, image points beyond the paraxial region on the Gaussian plane become blurred, and the image of a planar object becomes a curved surface of rotation, and a perfect image of the object plane cannot be obtained at the image plane.

[0169] Astigmatism is the axial distance between the meridional and sagittal image points of a narrow beam of light that do not coincide.

[0170] The meridional plane is the plane formed by the principal ray emitted from an object point outside the principal axis of an optical system and the principal axis of the optical system. Rays lying within the meridional plane are collectively called meridional beams. The point formed by a meridional beam is called a meridional image point. The image plane containing the meridional image point is called the meridional image plane.

[0171] The sagittal plane is a plane passing through the principal ray emitted from an object point located outside the principal axis of the optical system and perpendicular to the meridional plane. Rays lying within the sagittal plane are collectively called sagittal beams. The point formed by the sagittal beam is called the sagittal image point. The image plane containing the sagittal image point is called the sagittal image plane.

[0172] Currently, optical lenses have become an important component of electronic devices. Through optical lenses, desired photos can be easily captured to meet people's photography needs. Initially, the optical lenses of electronic devices were all fixed-focus lenses, meaning that the focal length of the optical lens remained constant. These optical lenses were called fixed-focus lenses. As people's requirements for the image quality of electronic devices increased, fixed-focus lenses could no longer meet the requirements for shooting. Therefore, optical lenses with adjustable focal lengths (i.e., zoom lenses) came into being.

[0173] A zoom lens is an optical lens that allows you to change the focal length without changing your shooting position, enabling you to magnify or reduce the size of the object you are photographing. For example, when shooting distant objects, you can increase the focal length to bring the subject closer; when shooting a large scene, you can decrease the focal length to cover a wider area.

[0174] Zoom lenses are widely used in electronic devices such as mobile phones, tablets, and wearable devices. With the development of electronic technology, electronic devices are becoming increasingly thinner and lighter, requiring zoom lenses to have a smaller size to save internal space. Therefore, how to design zoom lenses to reduce their footprint within electronic devices has become an important issue in the industry.

[0175] One type of optical lens (i.e., zoom lens) in related technologies includes three lens groups. During zooming, the first lens group is fixed, while the other two lens groups move along the optical axis of the lens. However, this optical lens has three lens groups, which is a relatively large number, making the internal structure of the optical lens more complex. This is not conducive to reducing the space occupied by the optical lens inside the electronic device, thus hindering the thinning and lightening of the electronic device.

[0176] To address this, this application provides an optical lens, a camera module, and an electronic device. The optical lens has two lens groups. During zooming, both lens groups move along the optical axis of the optical lens, thus reducing the number of lens groups, simplifying the structure of the optical lens, and facilitating a reduction in the size of the optical lens, thereby reducing its footprint within the electronic device. Furthermore, by limiting the maximum movement distance of the first lens group to less than or equal to 20mm and the maximum movement distance of the second lens group to less than or equal to 29mm during zooming, the overall length of the optical lens and the size of the drive motor can be reduced, further minimizing the size of the optical lens and its footprint within the electronic device, thus contributing to a thinner and lighter electronic device.

[0177] The electronic devices in this application embodiment can be mobile phones, tablets, laptops, wearable devices (such as smartwatches), or other electronic devices with camera modules. The following uses a mobile phone as an example to specifically describe the electronic devices in this application embodiment. Other types of electronic devices can be set up with reference to the structure of the mobile phone embodiment, and will not be described in detail here.

[0178] Figure 2a This is a schematic diagram of the back of an electronic device (mobile phone) in some embodiments of this application. Figure 2b for Figure 2a A cross-sectional view of the electronic device in the diagram. Figure 2b The image shows the installation location of the camera module 400 in the electronic device, but its specific installation structure is not shown.

[0179] like Figure 2a and Figure 2b As shown, the electronic device includes a housing 500, a display screen 600, and a camera module 400, with both the display screen 600 and the camera module 400 mounted on the housing 500.

[0180] The display screen 620 can be a liquid crystal display screen, an OLED (Organic Light-Emitting Diode) display screen, a QLED (Quantum Dot Light-Emitting Diode) display screen, a Micro LED display screen, an electronic ink display screen, etc., without any specific limitations.

[0181] In some embodiments, such as Figure 2a and Figure 2b As shown, the housing 500 includes a mid-frame 510 (also called a front shell or front frame) and a rear cover 520 (also called a battery cover), with the mid-frame 510 connecting the display 600 and the rear cover 520.

[0182] The mid-frame 510 includes a bottom wall 511 and a side wall 512 disposed at the edge of the bottom wall 511. The edge of the display screen 600 is connected to the side wall 512, for example, by bonding. The display screen 600, the bottom wall 511, and the side wall 512 form a first receiving space 530, within which accessories 700 of the display screen 600 are disposed. For example, when the display screen 600 is an LCD display, the accessory 700 may be a backlight; or, when the display screen 600 is an OLED display, the accessory 700 may be a support film, a heat dissipation film, etc.

[0183] The edge of the back cover 520 is connected to the side wall 512 of the middle frame, for example, by snapping. The back cover 520, the bottom wall 511 of the middle frame, and the side wall 512 of the middle frame form a second receiving space 540, which is used to set up the camera module 400.

[0184] Of course, besides being installed in the second receiving space 540, the camera module 400 can also be installed in the first receiving space 530 to serve as a front-facing camera module for electronic devices. The mid-frame 510 is also not limited to... Figure 2b The structure shown can also be configured as other structures according to the actual situation, such as the middle frame 510 may not include the bottom wall 511.

[0185] like Figure 2b As shown, the camera module 400 includes an optical lens 100 and a photosensitive element 200. The photosensitive element 200 is located on the image side of the optical lens 100, and the optical lens 100 is disposed opposite to the camera window 521 on the rear cover 520.

[0186] The optical lens 100 is used for focusing and imaging; the photosensitive element 200 (also known as an image sensor) is used to convert light signals into electrical signals. The photosensitive element 200 can be a charge-coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS) device, and no specific limitation is made here.

[0187] The working principle of the camera module 400 is as follows: Figure 2b As shown, light from the subject enters the optical lens 100 through the camera window 521, forming a clear image on the focal plane of the optical lens 100. The image of the subject is recorded by the photosensitive element 200 located at the focal plane. The photosensitive element 200 converts the optical image into an electrical signal and transmits it to the processor of the electronic device. The processor transmits the electrical signal to the display screen 600 to display the image of the subject on the display screen 600.

[0188] In some embodiments, such as Figure 2b As shown, the camera module 400 also includes a filter 300, which is located between the optical lens 100 and the photosensitive element 200. The filter 300 is used to filter out unwanted wavelengths in the light, preventing the photosensitive element 200 from producing false colors or ripples, thereby improving its effective resolution and color reproduction. For example, the filter 300 can be an infrared filter.

[0189] Of course, the filter 300 is not limited to being placed between the optical lens 100 and the photosensitive element 200. The filter 300 can also be attached to the surface of one of the lenses or prisms of the optical lens 100 to achieve filtering.

[0190] Figure 3 This is a state diagram of the camera module 400 in the first embodiment of this application (optical lens 100 is in short focal length state). Figure 4 This is the second state diagram of the camera module 400 in the first embodiment of this application (the optical lens 100 is in telephoto mode).

[0191] like Figure 3 and Figure 4 As shown, the optical lens 100 includes two lens groups, which are all the lens groups of the optical lens 100, and are arranged along the optical axis 10 of the optical lens 100. That is, the optical lens 100 has two lens groups.

[0192] The two lens groups are a first lens group G1 with positive optical power and a second lens group G2 with negative optical power, with the second lens group G2 located on the image side of the first lens group G1.

[0193] The optical lens 100 has a short focal length (e.g.) Figure 3 (as shown) and telephoto mode (as shown) Figure 4 As shown, when the optical lens 100 zooms between the short focal length state and the long focal length state, the first lens group G1 and the second lens group G2 can move along the optical axis 10 of the lens respectively, and the distance between the first lens group G1 and the second lens group G2 changes.

[0194] Among them, such as Figure 3 and Figure 4 As shown, when the optical lens 100 switches from a short focal length state to a long focal length state, both the first lens group G1 and the second lens group G2 move away from the photosensitive element 200 (e.g., Figure 3 The lens moves (to the left) and the spacing between the first lens group G1 and the second lens group G2 decreases; when the optical lens 100 switches from a telephoto state to a short-focus state, both the first lens group G1 and the second lens group G2 move closer to the photosensitive element 200 (e.g., from the center to the left), and the spacing between the first lens group G1 and the second lens group G2 decreases; Figure 4 The lens moves in the direction of rightward movement, and the interval between the first lens group G1 and the second lens group G2 increases.

[0195] The focusing method of the optical lens 100 is not unique. In some embodiments, focusing can also be achieved by moving the first lens group G1, as shown in the example below. Figure 3 and Figure 4 As shown, when the optical lens 100 is in telephoto or short-focus mode, the second lens group G2 is fixed relative to the image plane of the optical lens 100 (such as the photosensitive surface of the photosensitive element 200) along the lens optical axis 10, and the first lens group G2 can move relative to the second lens group G2 along the lens optical axis 10, so that the optical lens 100 can switch between focusing on distant objects and focusing on close objects.

[0196] In some embodiments, focusing can also be achieved by moving the second lens group G2, specifically as follows: Figure 3 and Figure 4 As shown, when the optical lens 100 is in telephoto or focal length mode, the first lens group G1 is fixed relative to the image plane of the optical lens 100 (e.g., the photosensitive surface of the image sensor 200) along the lens optical axis 10, while the second lens group G2 can move relative to the first lens group G1 along the lens optical axis 10, allowing the optical lens 100 to switch between focusing on distant and close-up objects. With this configuration, when the optical lens 100 is in telephoto or focal length mode, it can capture both distant and close-up objects without changing its position, thus expanding the shooting range of the optical lens 100. Furthermore, focusing is achieved by moving the second lens group G2, and the total length of the optical lens 100 remains unchanged during focusing, thus avoiding an increase in the size of the optical lens 100.

[0197] In some embodiments, focusing can be achieved by moving the first lens group G1 in the short focal length state and by moving the second lens group G2 in the long focal length state, as described below: When the optical lens 100 is in the short focal length state, the first lens group G1 is fixed relative to the image plane of the optical lens 100 (e.g., the photosensitive surface of the photosensitive element 200) along the lens optical axis 10, and the second lens group G2 can move relative to the first lens group G1 along the lens optical axis 10, so that the optical lens 100 can switch between focusing on the distant view and focusing on the near view; when the optical lens 100 is in the long focal length state, the first lens group G1 is fixed relative to the image plane of the optical lens 100 (e.g., the photosensitive surface of the photosensitive element 200) along the lens optical axis 10, and the second lens group G2 can move relative to the first lens group G1 along the lens optical axis 10, so that the optical lens 100 can switch between focusing on the distant view and focusing on the near view.

[0198] This application uses the example of the second lens group G2 moving to achieve focusing to specifically introduce the focusing and optical zoom principles of the optical lens 100.

[0199] Figure 5 This is a schematic diagram illustrating the zoom and focus principles of the optical lens 100 in the camera module 400 according to the first embodiment of this application. Figure 5 Figure (1) shows a state diagram of the optical lens 100 in the first embodiment of this application in a telephoto state and focusing on a close-up scene. Figure 5 (2) shows a state diagram of the optical lens 100 in the first embodiment of this application in a telephoto state and focused on a distant scene. Figure 5 Figure (3) shows a state diagram of the optical lens 100 in the first embodiment of this application in a short focal length state and focusing on a distant scene. Figure 5 (4) shows a state diagram of the optical lens 100 in the first embodiment of this application in a short focal length state and focusing on a close-up scene.

[0200] like Figure 5 As shown in (2) and (3) in the figure, when the optical lens 100 is focusing on a distant scene, during the process of switching the optical lens 100 from the telephoto state to the short focal length state, the first lens group G1 and the second lens group G2 both move towards the image plane (for example, to the right in the figure); during the process of switching the optical lens 100 from the short focal length state to the telephoto state, the first lens group G1 and the second lens group G2 both move away from the image plane (for example, to the left in the figure).

[0201] like Figure 5As shown in (1) and (2) in the figure, when the optical lens 100 is in the telephoto state, when the optical lens 100 switches from focusing on the distant view to focusing on the near view, the first lens group G1 is fixed relative to the image plane of the optical lens 100 (such as the photosensitive surface of the photosensitive element 200) along the lens optical axis 10, and the second lens group G2 moves towards the image plane (for example, to the right in the figure); when the optical lens 100 switches from focusing on the near view to focusing on the distant view, the second lens group G2 moves away from the image plane (for example, to the left in the figure).

[0202] like Figure 5 As shown in (3) and (4) in the figure, when the optical lens 100 is in a short focal length state, when the optical lens 100 switches from focusing on the distant view to focusing on the near view, the first lens group G1 is fixed relative to the image plane of the optical lens 100 along the lens optical axis 10, and the second lens group G2 moves towards the image plane (for example, to the right in the figure); when the optical lens 100 switches from focusing on the near view to focusing on the distant view, the second lens group G2 moves away from the image plane (for example, to the left in the figure).

[0203] It is important to understand that the optical lens 100 has a first focal length when in telephoto mode, which is the range of its effective focal length. When in short focal length mode, the optical lens 100 has a second focal length, which is also the range of its effective focal length. The maximum value of the first focal length is greater than the maximum value of the second focal length. However, the minimum value of the first focal length can be greater than or less than the maximum value of the second focal length; no specific limitation is made here. For example, the first focal length can be 15mm–21mm, and the second focal length can be 10mm–17mm; or, for example, the first focal length can be 29mm–31mm, and the second focal length can be 17mm–23mm. When the optical lens 100 is in telephoto mode and the second lens group G2 moves along the lens optical axis 10 for internal focusing, the effective focal length of the optical lens 100 will change within the range of the first focal length; when the optical lens 100 is in telephoto mode and the second lens group G2 moves along the lens optical axis 10 for internal focusing, the effective focal length of the optical lens 100 will change within the range of the second focal length.

[0204] In this context, "focusing on a distant scene" means that the optical lens 100 can clearly image the subject at a first working distance; "focusing on a close scene" means that the optical lens 100 can clearly image the subject at a second working distance, where the second working distance is shorter than the first working distance. In telephoto mode, the first working distance is the maximum working distance at which the optical lens 100 can achieve a clear image, such as infinity; the second working distance is the minimum working distance at which the optical lens 100 can achieve a clear image, such as 91mm. In short focal length mode, the first working distance is the maximum working distance at which the optical lens 100 can achieve a clear image, such as infinity; the second working distance is the minimum object distance at which the optical lens 100 can achieve a clear image, such as 46mm.

[0205] In some embodiments, such as Figure 5 As shown, when the optical lens 100 switches between short focal length and long focal length, the maximum value of the first moving distance of the first lens group G1 in the object-side direction or image-side direction toward the first lens group G1 is less than or equal to 20 mm, and the maximum value of the second moving distance Δ of the second lens group G2 in the object-side direction or image-side direction toward the second lens group G2 is less than or equal to 29 mm.

[0206] For example Figure 3 As shown, when the optical lens 100 switches from a short focal length state to a long focal length state, along the object-side direction toward the first lens group G1 (e.g., Figure 3 (in the direction from left to right), the maximum value of the first movement distance of the first lens group G1 is less than or equal to 20 mm; along the object-side direction toward the second lens group G2 (e.g., from left to right). Figure 3 (From the center to the left), the maximum value of the second moving distance Δ of the second lens group G2 is less than or equal to 29mm.

[0207] By setting the maximum value of the first moving distance of the first lens group G1 to less than or equal to 20mm, the moving stroke of the first lens group G1 is shortened. This not only helps to reduce the size of the drive motor of the first lens group G1, but also helps to reduce the total length of the optical lens 100 in the telephoto state, thereby reducing the size of the optical lens and reducing the space occupied inside the electronic device.

[0208] By setting the maximum value of the second moving distance Δ of the second lens group G2 to less than or equal to 29mm, the moving stroke of the second lens group G2 is shortened, which helps to reduce the size of the drive motor of the second lens group G2, thereby helping to reduce the size of the optical lens 100 and reduce the space occupied by the electronic device.

[0209] In some embodiments, such as Figure 5As shown, the second moving distance Δ of the second lens group G2 includes the second optical zoom moving distance Δ1; the second optical zoom moving distance Δ1 is the moving distance of the second lens group G2 during the process of the optical lens 100 switching from a short focal length state to a long focal length state when the optical lens 100 is focusing on a distant scene; the second optical zoom moving distance Δ1 satisfies: Δ1≤27.6mm. For example, Δ1 can be 8.367mm, 3.976mm, 17.551mm, 19.303mm, 27.572mm, etc.

[0210] This design avoids an excessively large second optical zoom movement distance Δ1 of the second lens group G2 during optical zoom, which helps to reduce the size of the drive motor of the second lens group G2, thereby reducing the overall size of the optical lens 100. Simultaneously, a shorter second optical zoom movement distance Δ1 means that the second lens group G2 can complete its movement more quickly, enabling the optical lens 100 to achieve relatively fast optical zoom. This is extremely helpful for capturing fleeting moments or scenes requiring rapid changes in shooting angle, such as shooting sports events or wildlife.

[0211] In some embodiments, such as Figure 5 As shown, the second optical zoom movement distance Δ1 satisfies the condition: 3.9mm ≤ Δ1 ≤ 8.5mm. For example, Δ1 can be 8.367mm, 3.976mm, etc. This setting avoids the second optical zoom movement distance Δ1 from being too large, which helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve faster optical zoom. At the same time, it also avoids the second optical zoom movement distance Δ1 from being too small, which helps to reduce the precision requirements of the drive motor of the second lens group G2, and thus helps to reduce the design and manufacturing cost of the drive motor of the second lens group G2.

[0212] In some embodiments, such as Figure 5 As shown, the second optical zoom movement distance Δ1 satisfies the following condition: 17.4mm ≤ Δ1 ≤ 27.6mm. For example, Δ1 can be 17.551mm, 19.303mm, 27.572mm, etc. This setting avoids the second optical zoom movement distance Δ1 from being too large, which helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve relatively fast optical zoom. At the same time, it also avoids the second optical zoom movement distance Δ1 from being too small, which helps to reduce the accuracy requirements of the drive motor of the second lens group G2, and thus helps to reduce the design and manufacturing cost of the drive motor of the second lens group G2.

[0213] In some embodiments, such as Figure 5 As shown, the effective focal length f of the first lens group G1 g1 The effective focal length f of the second lens group G2 g2The effective focal length F and the optical power distribution ratio α of the optical lens satisfy the following:

[0214] |-nf g2 |≤27.6mm; for example, |-nf g2 | It can be 8.367mm, 3.976mm, 17.551mm, 19.303mm, 27.572mm, etc.

[0215] Where n is the difference between the value of α when the optical lens is in telephoto mode and the value of α when it is in telephoto mode; α = F / f g1 .

[0216] Through formula derivation, we can obtain Δ1=|-nf g2 (A detailed derivation will follow later), from the relation |-nf g2 It can be seen that the second optical zoom movement distance Δ1 is related to F and f. g1 f g2 This is related to the proper setting of F and f. g1 f g2 The size of the lens group G2 can control the second optical zoom movement distance Δ1, thereby controlling the volume of the optical lens 100.

[0217] In some embodiments, such as Figure 5 As shown, 3.9mm≤|-nf g2 |≤8.5mm. For example, |-nf g2 | It can be 8.367mm, 3.976mm, etc. This setting not only helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve faster optical zoom; it also avoids the second optical zoom movement distance Δ1 being too small, which helps to reduce the accuracy requirements of the drive motor of the second lens group G2, and thus helps to reduce the design and manufacturing cost of the drive motor of the second lens group G2.

[0218] In some embodiments, such as Figure 5 As shown, 17.4mm≤|-nf g2 |≤27.6mm,|-nf g2 | The focal length can be 17.551mm, 19.303mm, 27.572mm, etc. This setting not only helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve relatively fast optical zoom, but also avoids the second optical zoom movement distance Δ1 being too small, which helps to reduce the accuracy requirements of the drive motor of the second lens group G2, and thus helps to reduce the design and manufacturing cost of the drive motor of the second lens group G2.

[0219] In some embodiments, such as Figure 5As shown, the second moving distance Δ of the second lens group G2 also includes the focusing moving distance Δ2, which is the moving distance of the second lens group G2 when the optical lens switches between focusing on the near scene and focusing on the far scene.

[0220] like Figure 5 As shown in (1), when the optical lens 100 is in telephoto mode, the focusing movement distance Δ2 satisfies: Δ2≤6.9mm; for example, Δ2 can be 0.321mm, 1.307mm, 2.501mm, 3.061mm, 6.812mm, etc.

[0221] This design avoids excessive focusing distance Δ2 for the optical lens 100 in telephoto mode, which helps reduce the size of the drive motor of the second lens group G2, thereby reducing the overall size of the optical lens 100. Simultaneously, a shorter focusing distance Δ2 means that the second lens group G2 can complete its movement more quickly, enabling the optical lens 100 to focus relatively quickly in telephoto mode. When shooting fast-moving objects, such as athletes in sports events or birds in flight, the optical lens 100 can quickly capture clear images, ensuring no exciting moments are missed.

[0222] In some embodiments, such as Figure 5 As shown, when the optical lens 100 is in telephoto mode, the focusing movement distance Δ2 satisfies the following condition: 0.3mm ≤ Δ2 ≤ 2.6mm. For example, Δ2 can be 0.321mm, 1.307mm, 2.501mm, etc. This setting avoids the focusing movement distance Δ2 from being too large when the optical lens 100 is in telephoto mode, which helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve faster focusing. At the same time, it also avoids the focusing movement distance Δ2 from being too small when the optical lens 100 is in telephoto mode, which helps to reduce the accuracy requirements of the drive motor of the second lens group G2, and thus helps to reduce the design and manufacturing cost of the drive motor of the second lens group G2.

[0223] In some embodiments, such as Figure 5 As shown, when the optical lens 100 is in telephoto mode, the focusing movement distance Δ2 satisfies the following condition: 2.5mm ≤ Δ2 ≤ 6.9mm. For example, Δ2 can be 2.501mm, 3.061mm, 6.812mm, etc. This setting avoids the focusing movement distance Δ2 from being too large when the optical lens 100 is in telephoto mode, which helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve relatively fast focusing. At the same time, it also avoids the focusing movement distance Δ2 from being too small when the optical lens 100 is in telephoto mode, which helps to reduce the accuracy requirements of the drive motor of the second lens group G2, and thus helps to reduce the design and manufacturing cost of the drive motor of the second lens group G2.

[0224] In some embodiments, such as Figure 5 As shown in (4), when the optical lens is in a short focal length state, the focusing movement distance Δ2 satisfies: Δ2≤3.9mm; for example, Δ2 can be 3.690mm, 3.824mm, 0.691mm, 0.661mm, 1.089mm, etc.

[0225] This design avoids excessive focusing distance Δ2 when the optical lens 100 is in a short focal length state, which helps to reduce the size of the drive motor of the second lens group G2, thereby reducing the size of the optical lens 100. At the same time, it also allows the optical lens 100 to achieve relatively fast focusing in a short focal length state, enabling it to quickly capture clear images of fast-moving objects and ensure no exciting moments are missed.

[0226] Among them, such as Figure 5 As shown in (2), (3) and (4) in the figure, when the optical lens 100 switches from a telephoto state and focusing on a distant scene to a short focal length state and focusing on a close scene, the second lens group G2 moves in a direction closer to the image plane (for example, to the right in the figure). Therefore, the second moving distance Δ of the second lens group G2 is equal to the sum of the second optical zoom moving distance Δ1 and the focusing moving distance Δ2 of the optical lens 100 in the short focal length state.

[0227] In some embodiments, such as Figure 5 As shown, when the optical lens 100 is in short focal length mode, the focusing movement distance Δ2 satisfies the following condition: 0.65mm ≤ Δ2 ≤ 1.1mm. For example, Δ2 can be 0.691mm, 0.661mm, 1.089mm, etc. This setting avoids the focusing movement distance Δ2 from being too large when the optical lens 100 is in short focal length mode, which helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve faster focusing. At the same time, it also avoids the focusing movement distance Δ2 from being too small when the optical lens 100 is in short focal length mode, which helps to reduce the accuracy requirements of the drive motor of the second lens group G2, and thus helps to reduce the design and manufacturing cost of the drive motor of the second lens group G2.

[0228] In some embodiments, such as Figure 5As shown, when the optical lens 100 is in short focal length mode, the focusing movement distance Δ2 satisfies the following condition: 1.0mm ≤ Δ2 ≤ 3.9mm. For example, Δ2 can be 3.690mm, 3.824mm, etc. This setting avoids the focusing movement distance Δ2 from being too large when the optical lens 100 is in short focal length mode, which helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve relatively fast focusing. At the same time, it also avoids the focusing movement distance Δ2 from being too small when the optical lens 100 is in short focal length mode, which helps to reduce the accuracy requirements of the drive motor of the second lens group G2, and thus helps to reduce the design and manufacturing cost of the drive motor of the second lens group G2.

[0229] In some embodiments, such as Figure 5 As shown, the first moving distance of the first lens group G1 includes the first optical zoom moving distance q; the first optical zoom moving distance q is the moving distance of the first lens group G1 during the process of switching the optical lens 100 from a short focal length state to a long focal length state when the optical lens 100 is focusing on a distant scene. The first optical zoom moving distance q satisfies: q≤20mm. For example, q can be 5.546mm, 2.901mm, 12.732mm, 13.960mm, 19.941mm, etc.

[0230] This design avoids an excessively large first optical zoom movement distance q of the first lens group G1 during optical zooming. This not only helps reduce the size of the drive motor of the first lens group G1 but also reduces the overall length of the optical lens 100 in telephoto mode, thus reducing its overall size. Simultaneously, a shorter first optical zoom movement distance q means that the first lens group G1 can complete the movement more quickly, enabling the optical lens 100 to achieve faster optical zoom. This is highly helpful for capturing fleeting moments or scenes requiring rapid changes in shooting angle.

[0231] In some embodiments, such as Figure 5 As shown, the first optical zoom movement distance q satisfies the condition: 2.8mm ≤ q ≤ 6mm. For example, q can be 5.546mm, 2.901mm, etc. This setting avoids the first optical zoom movement distance q being too large, which helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve faster optical zoom. At the same time, it also avoids the first optical zoom movement distance q being too small, which helps to reduce the precision requirements of the drive motor of the first lens group G1, and thus helps to reduce the design and manufacturing cost of the drive motor of the first lens group G1.

[0232] In some embodiments, such as Figure 5As shown, the first optical zoom movement distance q satisfies the condition: 12mm ≤ q ≤ 20mm. For example, q can be 12.732mm, 13.960mm, 19.941mm, etc. This setting avoids the first optical zoom movement distance q being too large, which helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve relatively fast optical zoom. At the same time, it also avoids the first optical zoom movement distance q being too small, which helps to reduce the precision requirements of the drive motor of the first lens group G1, and thus helps to reduce the design and manufacturing cost of the drive motor of the first lens group G1.

[0233] In some embodiments, such as Figure 5 As shown, the effective focal length f of the first lens group G1 g1 The effective focal length f of the second lens group G2 g2 The effective focal length F and the optical power distribution ratio α of the optical lens satisfy the following:

[0234] |(m1-m2)f g2 |≤20mm; for example, |(m1-m2)f g2 | It can be 5.546mm, 2.901mm, 12.732mm, 13.960mm, 19.941mm, etc.

[0235] Where m1 is the optical lens in telephoto mode. The value of m2; m2 is the optical lens when in short focal length mode. The value of α; α = F / f g1 .

[0236] Through formula derivation, we can obtain q=|(m1-m2)f g2 (A detailed derivation will follow later), from the relation |(m1-m2)f g2 It can be seen that the first optical zoom movement distance q is related to F and f g1 f g2 This is related to the proper setting of F and f. g1 f g2 The size of the lens group G1 can control the first optical zoom movement distance q, thereby controlling the volume of the optical lens 100.

[0237] In some embodiments, such as Figure 5 As shown, 2.8mm≤|(m1-m2)f g2 |≤6mm; for example, |(m1-m2)f g2| It can be 5.546mm, 2.901mm, etc. This setting not only helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve faster optical zoom; it also helps to reduce the precision requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0238] In some embodiments, such as Figure 5 As shown, 12mm≤|(m1-m2)f g2 |≤20mm; for example, |(m1-m2)f g2 | The thickness can be 12.732mm, 13.960mm, 19.941mm, etc. This setting not only helps to reduce the size of the optical lens 100 and enables the optical lens 100 to achieve relatively fast optical zoom, but also helps to reduce the precision requirements of the drive motor of the second lens group G2, thereby helping to reduce the design and manufacturing costs of the drive motor of the second lens group G2.

[0239] In some embodiments, such as Figure 5 As shown, the first moving distance of the first lens group G1 is equal to the first optical zoom moving distance q. That is, during the switching between the short focal length and telephoto states of the optical lens 100, the first lens group G1 only performs optical zoom movement. This configuration simplifies the movement of the first lens group G1 during the switching process, not only simplifying the structure of the drive motor of the first lens group G1 but also preventing the first moving distance from being too large, thereby reducing the size of the optical lens 100.

[0240] The following discussion focuses on the relation q=|(m1-m2)f g2 |、Δ1=|-nf g2 The derivation process of | will be explained in detail.

[0241] Figure 6 This is an optical principle diagram of the optical lens 100 in the first embodiment of this application switching between a short focal length state and a long focal length state, wherein, Figure 6 Figure (1) shows the optical path diagram when the optical lens 100 in the first embodiment of this application is in a short focal length state. Figure 6 (2) shows the optical path diagram of the optical lens 100 in the first embodiment of this application when it is in the telephoto state.

[0242] like Figure 6 As shown, when optical lens 100 focuses on a distant scene, and the subject is at infinity (i.e., the object distance is infinite), the conjugate image plane formed by the light rays emitted from the subject through the first lens group G1 is m1, and the image distance V1 = f g1The conjugate image plane of the second lens group G2 is m2, which is the image plane IMA. Under the paraxial optical path model, the gap between the image-side principal plane of the first lens group G1 and the object-side principal plane of the second lens group G2 is:

[0243]

[0244] The object distance U2 from m1 to the second lens group G2 is d 12 -V1.

[0245]

[0246] Image distance of the second lens group G2:

[0247]

[0248] When the subject is at infinity (object distance is infinite), the distance from the image-side principal plane of the first lens group G1 to the image plane IMA is defined as TOTR, and TOTR satisfies: TOTR = d 12 +V2.

[0249]

[0250] To simplify the above formula, let α be the proportion of the optical power of the first lens group G1 in the optical lens 100, as shown below:

[0251] α=F / f g1 ;

[0252] Therefore, the distance TOTR from the image principal plane to the image plane IMA of the first lens group G1 is:

[0253]

[0254] After sorting, we can conclude that:

[0255] When the optical lens 100 is at any focal length and the object distance of the subject is infinite, the conjugate distance between the object and the image after imaging through the first lens group G1 and the second lens group G2 is: L2 = U2 + V2, which can be converted into:

[0256]

[0257] For example, with optical lens 100 in short focal length mode as the starting point, and the object distance of the photographed scene being infinite, the conjugate distance of the object and image after imaging through the first lens group G1 and the second lens group G2 is:

[0258]

[0259] L 2s =U 2s +V2s ;

[0260] Taking the short focal length state as the starting point of the calculation, the moving distance of the first lens group G1 (i.e., the first zoom moving distance) is q, and the change in the distance TOTR from the image principal plane to the image plane IMA of the first lens group G1 is q. Therefore, the object-image conjugate distance relationship of the second lens group G2 in any focal length state and the short focal length state can be obtained as follows:

[0261] L2 = L 2s -q

[0262] Substituting the formula for calculating the conjugate distance between the object and the image into the above formula, we get:

[0263]

[0264] The above equation can be transformed into a quadratic equation in α:

[0265]

[0266] Simplifying the above equation, let:

[0267]

[0268] The above quadratic equation in α can be solved only if the following conditions are met.

[0269] c 2 ≥4;

[0270]

[0271] Therefore, the solution to the above equation is:

[0272]

[0273] Taking the optical lens 100 in telephoto mode as the boundary condition, the object distance of the photographed scene is infinite. After the photographed scene is imaged by the first lens group G1 and the second lens group G2, it also satisfies the above calculation process.

[0274]

[0275] The formula defines the maximum movement of the first lens group G1 of the optical lens 100 from the short focal length state to the long focal length state as q. max ;

[0276]

[0277] L 2l =L 2s -q max ;

[0278]

[0279] During the switching process from short focal length to long focal length mode of optical lens 100, the maximum movement of the first lens group G1 is q. max Therefore, under any focal length condition, the movement of the first lens group G1 satisfies:

[0280] |q|≤|q max |;

[0281] in:

[0282]

[0283] q max =(m1-m2)fg2;

[0284] That is: q max =|(m1-m2)fg2|;

[0285] in

[0286] During optical zooming, the movement of the second lens group G2 affects the image distance of the second lens group G2. Based on the aforementioned process, the image distance V2 of the second lens group G2 is:

[0287]

[0288] The image distance V2 of the second lens group G2 is differentiated as follows:

[0289] dV2=-f g2 dα;

[0290] Therefore, the movement of the G2 group can be integrated from 0 to Δ1, with the parameter α integrated from 0 to α. l The calculation is as follows:

[0291]

[0292] The second optical zoom movement distance Δ1 of the second lens group G2 is converted into:

[0293] Δ1=-f g2 ×(α-α l )

[0294] When optical lens 100 switches from short focal length to long focal length, the second optical zoom movement distance Δ1 of the second lens group G2 is:

[0295] Δ1=|-f g2 ×(α l -α s )|=|-nf g2 |

[0296] Where n = α l -α s .

[0297] The following details the back focal length (BFL) of the optical lens 100, the gap width δ between the second lens group G2 and the first lens group G1, and their value ranges during the zooming and focusing process.

[0298] In some embodiments, such as Figure 5 As shown in (3), when the optical lens 100 is in a short focal length state and focusing on a distant scene, the back focal length BFL of the optical lens 100 satisfies: BFL ≥ 0.8mm. For example, BFL can be 4mm, 4.466mm, 0.853mm, 0.944mm, 1.349mm, etc. With this setting, when the optical lens 100 is in a short focal length state and focusing on a distant scene, the back focal length BFL can be avoided from being too small, so that the image side of the second lens group G2 has sufficient movement space, thereby significantly reducing the risk of the second lens group G2 colliding with its image side optical elements during internal focusing.

[0299] In this context, the back focal length BFL of the optical lens 100 refers to the axial distance from the last optical surface of the second lens group G2 (i.e., the optical surface closest to the image plane) to the image plane (i.e., the photosensitive surface of the image sensor 200), for example... Figure 3 The length of line segment a1a2 shown; for example... Figure 9 The length of line segment a1a6 + line segment a6a2 shown in the figure.

[0300] In some embodiments, such as Figure 5 As shown in (3), when the optical lens 100 is in a short focal length state and focusing on a distant scene, the back focal length BFL of the optical lens 100 satisfies: BFL ≥ 4mm, for example, BFL can be 4mm, 4.466mm, etc. With this setting, when the optical lens 100 is in a short focal length state and focusing on a distant scene, the image side of the second lens group G2 has more sufficient movement space, thereby greatly reducing the risk of the second lens group G2 colliding with its image side optical elements during internal focusing.

[0301] In some embodiments, such as Figure 5 As shown in (3), when the optical lens 100 is in a short focal length state and is focusing on a distant scene, the back focal length BFL of the optical lens 100 satisfies: BFL≤4.5mm. This setting can avoid setting the back focal length BFL too large, thus avoiding the camera module 400 from being too large, which is conducive to the miniaturization of the camera module 400.

[0302] In some embodiments, such as Figure 5As shown in (4), when the optical lens 100 is in a short focal length state and focusing on a close-up, the back focal length BFL of the optical lens 100 satisfies: BFL ≥ 0.15mm. For example, BFL can be 0.327mm, 0.697mm, 0.161mm, 0.284mm, 0.260mm, etc. With this setting, when the optical lens 100 is in a short focal length state and focusing on a close-up, sufficient safety space can be left on the image side of the second lens group G2 to avoid collision between the second lens group G2 and its image side optical elements under the action of external forces (such as the inertial force generated when the electronic device is dropped).

[0303] In some embodiments, such as Figure 5 As shown in (4), when the optical lens 100 is in a short focal length state and focusing on a close-up, the back focal length BFL of the optical lens 100 satisfies: BFL ≥ 0.32mm, for example, BFL can be 0.327mm, 0.697mm, etc. With this setting, when the optical lens 100 is in a short focal length state and focusing on a close-up, more sufficient safety space can be left on the image side of the second lens group G2, avoiding collision between the second lens group G2 and its image side optical elements under the action of external force.

[0304] In some embodiments, such as Figure 5 As shown in (4), when the optical lens 100 is in a short focal length state and is focusing on a close-up, the back focal length BFL of the optical lens 100 satisfies: BFL≤0.7mm. This setting can avoid the camera module 400 from being too large, thus facilitating the miniaturization of the camera module 400.

[0305] In some embodiments, such as Figure 5 As shown in (2), when the optical lens 100 is in telephoto mode and focusing on a distant scene, the back focal length BFL of the optical lens 100 satisfies: BFL ≥ 8.3mm. For example, BFL can be 12.367mm, 8.443mm, 18.404mm, 20.247mm, 28.921mm, etc. With this setting, when the optical lens 100 is in telephoto mode and focusing on a distant scene, the back focal length BFL can be avoided from being too small, so that the image side of the second lens group G2 has sufficient movement space, thereby significantly reducing the risk of the second lens group G2 colliding with its image side optical elements during optical zoom and internal focusing.

[0306] In some embodiments, such as Figure 5As shown in (2), when the optical lens 100 is in telephoto mode and focusing on a distant scene, the back focal length BFL of the optical lens 100 satisfies: BFL ≥ 20mm. For example, BFL can be 20.247mm, 28.921mm, etc. With this setting, when the optical lens 100 is in telephoto mode and focusing on a distant scene, the image side of the second lens group G2 has more sufficient movement space, thereby greatly reducing the risk of the second lens group G2 colliding with its image side optical elements during optical zoom and internal focusing.

[0307] In some embodiments, such as Figure 5 As shown in (2), when the optical lens 100 is in telephoto mode and focusing on a distant scene, the back focal length BFL of the optical lens 100 satisfies: BFL≤29mm. This setting can avoid the camera module 400 from being too large, thus facilitating the miniaturization of the camera module 400.

[0308] In some embodiments, such as Figure 5 As shown in (1), when the optical lens 100 is in telephoto mode and focusing on a close-up, the back focal length BFL of the optical lens 100 satisfies: BFL ≥ 7mm. For example, BFL can be 12.047mm, 7.159mm, 15.905mm, 17.183mm, 22.110mm, etc. With this setting, when the optical lens 100 is in telephoto mode and focusing on a close-up, sufficient safety space can be left on the image side of the second lens group G2 to avoid collision between the second lens group G2 and its image side optical elements under the action of external forces (such as the inertial force generated when an electronic device is dropped).

[0309] In some embodiments, such as Figure 5 As shown in (1), when the optical lens 100 is in telephoto mode and focusing on a close-up, the back focal length BFL of the optical lens 100 satisfies: BFL ≥ 15mm. For example, BFL can be 15.905mm, 17.183mm, 22.110mm, etc. With this setting, when the optical lens 100 is in telephoto mode and focusing on a close-up, more sufficient safety space can be provided on the image side of the second lens group G2, avoiding collision between the second lens group G2 and its image-side optical elements under external force.

[0310] In some embodiments, such as Figure 5 As shown in (1), when the optical lens 100 is in telephoto mode and focusing on close-up objects, the back focal length BFL of the optical lens 100 satisfies: BFL≤22.3mm. This setting can avoid the camera module 400 from being too large, thus facilitating the miniaturization of the camera module 400.

[0311] In some embodiments, such as Figure 5As shown in (4), when the optical lens 100 is in a short focal length state and focusing on a close-up, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥5.1mm, for example, δ can be 7.19mm, 5.259mm, 5.785mm, 6.306mm, 9.154mm, etc. With this setting, during the process of switching the optical lens 100 from focusing on a close-up to focusing on a distant view, there can be sufficient safety space between the second lens group G2 and the first lens group G1, thereby significantly reducing the risk of collision between the second lens group G2 and the first lens group G1.

[0312] The gap width δ between the second lens group G2 and the first lens group G1 refers to the width of the gap between the second lens group G2 and the first lens group G1 on the optical axis 10 of the lens. For example... Figure 3 The length of line segment a3a4 shown; for example... Figure 6 The length of the line segment a3a5+a5a4 shown.

[0313] In some embodiments, such as Figure 5 As shown in (4), when the optical lens 100 is in a short focal length state and is focusing on a close-up, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥7.1mm, for example, δ can be 7.19mm, 9.154mm, etc. With this setting, during the process of switching the optical lens 100 from focusing on a close-up to focusing on a distant view, there can be more sufficient safety space between the second lens group G2 and the first lens group G1, thereby significantly reducing the risk of collision between the second lens group G2 and the first lens group G1.

[0314] In some embodiments, such as Figure 5 As shown in (4), when the optical lens 100 is in a short focal length state and is focusing on a close-up, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≤9.2mm. This setting can avoid the camera module 400 from being too large, thereby facilitating the miniaturization of the camera module 400.

[0315] In some embodiments, such as Figure 5 As shown in (3), when the optical lens 100 is in a short focal length state and focusing on a distant scene, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥1.3mm, for example, δ can be 3.5mm, 1.436mm, 5.093mm, 5.646mm, 8.065mm, etc. With this setting, when the optical lens 100 is in a short focal length state and focusing on a distant scene, there can be sufficient safety space between the second lens group G2 and the first lens group G1 to avoid collision between the second lens group G2 and the first lens group G1 under the action of external forces (such as the inertial force generated when an electronic device is dropped).

[0316] In some embodiments, such as Figure 5 As shown in (3), when the optical lens 100 is in a short focal length state and focusing on a distant scene, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥5mm, for example, δ can be 5.093mm, 5.646mm, 8.065mm, etc. With this setting, when the optical lens 100 is in a short focal length state and focusing on a distant scene, there can be more sufficient safety space between the second lens group G2 and the first lens group G1, avoiding collision between the second lens group G2 and the first lens group G1 under the action of external force.

[0317] In some embodiments, such as Figure 5 As shown in (3), when the optical lens 100 is in a short focal length state and is focusing on a distant scene, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≤8.1mm. This setting can avoid the camera module 400 from being too large, thereby facilitating the miniaturization of the camera module 400.

[0318] In some embodiments, such as Figure 5 As shown in (1), when the optical lens 100 is in telephoto mode and focusing on a close-up, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥1mm; for example, δ can be 1mm, 1.667mm, 2.775mm, 3.365mm, 7.245mm, etc. With this setting, during the process of switching the optical lens 100 from focusing on a close-up to focusing on a distant view, there can be sufficient safety space between the second lens group G2 and the first lens group G1, thereby significantly reducing the risk of collision between the second lens group G2 and the first lens group G1.

[0319] In some embodiments, such as Figure 5 As shown in (1), when the optical lens 100 is in telephoto mode and focusing on a close-up, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥3.3mm; for example, δ can be 3.365mm, 7.245mm, etc. With this setting, during the process of switching the optical lens 100 from focusing on a close-up to focusing on a distant view, there can be more sufficient safety space between the second lens group G2 and the first lens group G1, thereby significantly reducing the risk of collision between the second lens group G2 and the first lens group G1.

[0320] In some embodiments, such as Figure 5 As shown in (1), when the optical lens 100 is in telephoto mode and focusing on close-up objects, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≤7.3mm. This setting can avoid the camera module 400 from being too large, thereby facilitating the miniaturization of the camera module 400.

[0321] In some embodiments, such as Figure 5 As shown in (2), when the optical lens 100 is in telephoto mode and focusing on a distant scene, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥0.26mm; for example, δ can be 0.67mm, 0.360mm, 0.274mm, 0.304mm, 0.434mm, etc. With this setting, when the optical lens 100 is in telephoto mode and focusing on a distant scene, there can be sufficient safety space between the second lens group G2 and the first lens group G1 to avoid collision between the second lens group G2 and the first lens group G1 under the action of external force (such as the inertial force generated when the electronic device is dropped).

[0322] In some embodiments, such as Figure 5 As shown in (2), when the optical lens 100 is in telephoto mode and focusing on a distant scene, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≥0.36mm; for example, δ can be 0.67mm, 0.360mm, 0.434mm, etc. With this setting, when the optical lens 100 is in telephoto mode and focusing on a distant scene, there can be more sufficient safety space between the second lens group G2 and the first lens group G1, avoiding collision between the second lens group G2 and the first lens group G1 under the action of external force.

[0323] In some embodiments, such as Figure 5 As shown in (2), when the optical lens 100 is in telephoto mode and focusing on a distant scene, the gap width δ between the first lens group G1 and the second lens group G2 satisfies: δ≤0.68mm. This setting can avoid the camera module 400 from being too large, thus facilitating the miniaturization of the camera module 400.

[0324] The following section details the focusing stroke compression ratio ξ, the optical power distribution ratio α, and their value ranges for optical lens 100.

[0325] The focus travel compression ratio ξ (also known as the focus sensitivity parameter sens) is defined as: the focusing travel of the entire optical lens 100 (excluding the pivot element) as the focusing lens group (or the amount of image plane movement of the optical lens 100 during focusing) divided by the focusing travel of a specific lens group within the optical lens 100 (e.g., the second lens group G2) as the focusing lens group. A larger focus travel compression ratio ξ results in a smaller focusing travel for the focusing lens group; conversely, a smaller focus travel compression ratio ξ results in a larger focusing travel for the focusing lens group.

[0326] For a detailed description of the focusing stroke compression ratio ξ and the expression for the focusing stroke compression ratio ξ, please refer to the records in the applicant's earlier applications with patent application numbers 202410875013.7, 202311092486.1, and 202410023387.6.

[0327] In some embodiments, such as Figure 3 As shown, the minimum value of the focusing stroke compression ratio ξ min α, the power distribution ratio, F, the effective focal length of the optical lens, and f, the effective focal length of the first lens group G1 g1 Satisfy: 0.8≤ξ min =|1-α 2 |≤6.3. For example, ξ min Possible values ​​include 1.227, 2.037, 0.893, 0.807, 2.950, 3.5, 6.008, and 6.226. This setting avoids the minimum value ξ of the focusing stroke compression ratio of the optical lens 100. min The size of the focus movement distance Δ2 of the second lens group G2 can be reduced, which is beneficial to reducing the size of the drive motor of the second lens group G2; it can also avoid the focus movement distance Δ2 of the second lens group G2 being too short, which reduces the accuracy requirements of the drive motor of the second lens group G2 and helps to reduce the cost of the camera module 400.

[0328] As for the minimum value of the focusing stroke compression ratio ξ min =|1-α 2 For details on the derivation process, please refer to the applicant's prior application in patent application number 202410023387.6.

[0329] In some embodiments, such as Figure 3 As shown, when the optical lens 100 is in a short focal length state, the minimum value of the focusing stroke compression ratio ξ is... min Satisfy: 0.8≤ξ min ≤2.1; for example, ξ min Possible values ​​include 1.227, 2.037, 0.893, and 0.807. This setting avoids the minimum focusing stroke compression ratio ξ being reached when the optical lens 100 is in a short focal length state. min The size of the drive motor of the second lens group G2 is too large or too small, which can reduce the size of the drive motor of the second lens group G2 and reduce the accuracy requirements of the drive motor of the second lens group G2.

[0330] In some embodiments, such as Figure 4 As shown, when the optical lens 100 is in telephoto mode, the minimum value of the focusing stroke compression ratio ξ is... min Satisfy: 3.0≤ξ min ≤6.3; for example, ξ minPossible values ​​include 2.950, 3.5, 6.008, and 6.226. This setting avoids the minimum focusing stroke compression ratio ξ when the optical lens 100 is in telephoto mode. min The size of the drive motor of the second lens group G2 is too large or too small, which can reduce the size of the drive motor of the second lens group G2 and reduce the accuracy requirements of the drive motor of the second lens group G2.

[0331] In some embodiments, such as Figure 3 As shown, the optical power distribution ratio α, the effective focal length F of the optical lens, and the effective focal length f of the first lens group G1 are... g1 Satisfy: 1.3≤α=F / f g1 ≤2.7. For example, α can be 1.492, 1.743, 1.376, 1.344, 1.987, 2.121, 2.647, 2.688, etc.

[0332] From the relation ξ min =|1-α 2 | can be obtained ξ min Proportional to α, by setting the range of α to 1.3 ≤ α ≤ 2.7, the focusing stroke compression ratio ξ of the optical lens 100 can be avoided. min The size of the focus movement distance Δ2 of the second lens group G2 can be reduced, which is beneficial to reducing the size of the drive motor of the second lens group G2; it can also avoid the focus movement distance Δ2 of the second lens group G2 being too short, which would reduce the accuracy requirements of the drive motor of the second lens group G2 and help reduce the cost of the camera module 400.

[0333] In some embodiments, such as Figure 3 As shown, when the optical lens 100 is in short focal length mode, the optical power distribution ratio α satisfies: 1.36 ≤ α ≤ 1.75; for example, α can be 1.492, 1.743, 1.376, 1.344, etc. This setting avoids the minimum value ξ of the focusing stroke compression ratio when the optical lens 100 is in short focal length mode. min The size of the drive motor of the second lens group G2 is too large or too small, which can reduce the size of the drive motor of the second lens group G2 and reduce the accuracy requirements of the drive motor of the second lens group G2.

[0334] In some embodiments, such as Figure 4 As shown, when the optical lens 100 is in telephoto mode, the optical power distribution ratio α satisfies: 1.97 ≤ α ≤ 2.69. For example, α can be 1.987, 2.121, 2.647, 2.688, etc. This setting can avoid the minimum value ξ of the focusing stroke compression ratio when the optical lens 100 is in telephoto mode. minThe size of the drive motor of the second lens group G2 is too large or too small, which can reduce the size of the drive motor of the second lens group G2 and reduce the accuracy requirements of the drive motor of the second lens group G2.

[0335] The following details the minimum focusing distance U of optical lens 100 when it is in short focal length mode. 1min ′ and its range of values; and also provides a detailed explanation of the relation. The range of values ​​for and the relation The relationship between the distance U1 of the photographed scene and the object distance U1.

[0336] In some embodiments, such as Figure 3 As shown, when the optical lens 100 is in short focal length mode, the closest focusing distance U of the optical lens 100 is... 1min ′ Satisfy: U 1min ≥45mm. For example, U 1min The focal length can be 144.532mm, 46.43mm, 594.636mm, 793.857mm, 991.226mm, etc. This setting avoids the minimum focusing distance U of the optical lens 100 when it is in a short focal length state. 1min The smaller the angle, the easier it is to design the optical lens 100, which in turn helps to reduce the design cost of the optical lens 100.

[0337] Among them, the closest focusing distance U 1min ′ refers to the shortest distance at which the optical lens 100 can achieve sharp focus. The shortest distance is the shortest distance from the subject to the object-side surface of the first lens of the optical lens 100. When the optical lens 100 is in short focal length mode, the distance from the subject to the optical lens 100 is greater than or equal to the closest focusing distance U. 1min Only when the distance between the subject and the optical lens 100 is less than the minimum focusing distance U can the optical lens 100 accurately focus and produce a clear image. 1min At this time, the optical lens 100 cannot focus correctly, resulting in a blurry image.

[0338] In some embodiments, such as Figure 3 As shown, when the optical lens is in short focal length mode, the optical power distribution ratio α, the effective focal length F of the optical lens, and the effective focal length f of the first lens group G1 are... g1 The effective focal length f of the second lens group G2 g2 satisfy:

[0339] for example It can be 18.694mm, 11.501mm, 16.768mm, 18.650mm, etc.

[0340] in,

[0341] By relational Setting it to greater than or equal to 11mm limits the minimum object distance U1 that the optical lens 100 can clearly image in short focal length mode. That is, the minimum object distance U1 is 18mm. In this way, the optical lens 100 can achieve closer shooting in short focal length mode, and the optical lens 100 can capture the details of objects at closer distances, thereby improving the image quality of the optical lens 100 at closer distances.

[0342] What needs to be understood is: the minimum value of U1 (i.e., U...) 1min ) and U 1min ′ are two different concepts, the difference being: U 1min It is the minimum distance from the subject to the object-side principal plane of the optical lens 100; U 1min ′ is the shortest distance from the subject to the object-side surface of the first lens of the optical lens 100.

[0343] The following explains the relationship between the object distance U1 of the photographed scene and the focal length when the optical lens 100 is in short focal length mode. The derivation process of the relationship between them.

[0344] Figure 7 This is a schematic diagram illustrating the focusing principle of the optical lens 100 in the first embodiment of this application in a short focal length state.

[0345] like Figure 7 As shown, when the object distance of the subject changes, the first lens group G1 remains fixed relative to the image plane IMA, while the second lens group G2 moves, i.e., d 12 As the distance to V2 changes, the distance from the image m1 formed by the object plane through the first lens group G1 to the object-side principal plane of the first lens group G1 is defined as TOTR1:

[0346]

[0347] During the internal focusing process, the second lens group G2 maintains the IMA position on the image plane unchanged throughout, thus yielding the following differential equation for internal focusing:

[0348]

[0349] The general solution of the above internal focusing differential equation is as follows:

[0350]

[0351] When the optical lens 100 is in short focal length mode, the object distance U 1∞ =∞, then V 1∞ =f g1 The particular solution is calculated in the following form:

[0352]

[0353] therefore:

[0354]

[0355] The joint equation obtained from the general solution and the particular solution is as follows:

[0356]

[0357] The key parameters of the joint equations are as follows:

[0358]

[0359] therefore:

[0360]

[0361] The equation can be transformed into the following equation in terms of α:

[0362]

[0363] To simplify the equation, let:

[0364]

[0365] Therefore, the equation for α takes the following form:

[0366]

[0367] This can be transformed into a quadratic equation in α as follows:

[0368] α 2 (f g2 +c1d)+(d+c1f g2 )α+f g2 =0;

[0369] The solution to the above quadratic equation is as follows:

[0370]

[0371] Transform into:

[0372]

[0373] In order for α in the above formula to be solvable, the following must be satisfied:

[0374]

[0375] Therefore, we need to solve the problem in two cases. Case 1 is as follows:

[0376] c1f g2 -d≥2fg2 ;

[0377]

[0378] Right now:

[0379]

[0380] After sorting, we can obtain:

[0381]

[0382] Right now:

[0383] in,

[0384] The following is scenario 2:

[0385] c1f g2 -d≤-2f g2 ;

[0386]

[0387] Right now:

[0388]

[0389] After sorting, we can obtain:

[0390]

[0391] To limit the minimum value of U1, case 2 is discarded, and case 1 is retained; that is... in,

[0392] From the relation Therefore, it can be reasonably set up. The size of the value can limit the minimum value of U1.

[0393] The following details the maximum optical zoom ratio (Г) of the 100mm optical lens. max Maximum system zoom ratio Г′ max and its range of values.

[0394] In some embodiments, such as Figure 3 As shown, 1.2≤Г max ≤2.0, for example, Г max It can be 1.33, 1.22, 1.92, 2, etc.

[0395] Among them, Г maxThe maximum optical zoom ratio is the maximum ratio of the effective focal length of the optical lens when it is in telephoto mode to the maximum effective focal length when it is in telephoto mode, provided the optical lens is focused on a distant scene.

[0396] This setting avoids the maximum optical zoom ratio Г max Too large or too small, if Г max If it is too large, the overall length of the optical lens 100 will be too long, which is not conducive to the miniaturization design of the optical lens 100; if Г max A smaller maximum zoom ratio means the lens can cover a narrower focal length range, affecting the magnification of the optical lens in telephoto mode. Research has found that when 1.2 ≤ Г max When the magnification is ≤2.0, this not only helps to reduce the size of the optical lens 100, making it easier to achieve a miniaturized design of the optical lens 100, but also helps to increase the magnification of the optical lens 100 in telephoto mode, thus helping to clearly bring the details of distant scenes closer.

[0397] In some embodiments, such as Figure 3 As shown, 1.2≤j≤2.0; for example, j can be 1.33, 1.22, 1.92, 2, etc.

[0398] Where j is the ratio of the α value when the optical lens is in telephoto mode to the α value when it is in telephoto mode, when the optical lens is focused on a distant scene.

[0399] Through formula derivation, we know that j = Г max From j, we can know that the maximum optical zoom ratio Г max Related to α, the maximum optical zoom ratio Γ can be controlled by setting the value of α appropriately. max The maximum and minimum values ​​can be used to control the size of the optical lens 100 and the magnification of the optical lens 100 in telephoto mode.

[0400] In some embodiments, such as Figure 3 As shown, 1.7≤Г′ max ≤2.2; for example, Г′ max It can be 1.77, 1.99, 2.06, 2.12, 2.14, etc.

[0401] Among them, Г′ max The maximum system zoom ratio is the ratio of the maximum effective focal length to the minimum effective focal length of the optical lens.

[0402] This configuration not only helps to reduce the size of the optical lens 100, making it easier to achieve a miniaturized design, but also helps to increase the magnification of the optical lens 100 in telephoto mode, thus making it easier to clearly bring the details of distant scenes closer.

[0403] The following explains the maximum zoom ratio Г of the optical lens 100. max The derivation process of the relationship between j and j.

[0404] The optical zoom ratio Γ is defined as: the effective focal length of the optical lens 100 in any state when it is focusing on a distant scene (e.g., the object distance of the subject is infinity) and the effective focal length F when it is in a short focal length state. s The ratios are shown below:

[0405]

[0406] Based on the definition of parameter α above, the optical lens 100 has the following relationship in any focal length state, short focal length state, and long focal length state:

[0407]

[0408] Therefore, the optical zoom ratio of the 100DE lens can also be converted to:

[0409]

[0410] Based on the maximum optical zoom ratio Г max The definition is:

[0411]

[0412] Therefore, by setting the value of parameter j appropriately, the maximum optical zoom ratio Γ can be limited. max Size.

[0413] In some embodiments, 1.7 ≤ Fno ≤ 4.1; where Fno is the aperture number of the optical lens. This setting avoids Fno being too large or too small. If Fno is too large, the amount of light entering the optical lens 100 will be insufficient, resulting in underexposure and a dark image in low-light environments, thus affecting the image quality of the optical lens 100. If Fno is too small, the aperture diameter will be large, increasing aberrations such as spherical aberration, coma, and chromatic aberration, which is detrimental to aberration correction. By setting Fno to 1.7 ≤ Fno ≤ 4.1, not only is the amount of light entering the optical lens 100 guaranteed to ensure image quality in low-light environments, but it also facilitates the correction of aberrations such as spherical aberration, coma, and chromatic aberration, thereby improving the image quality of the optical lens 100.

[0414] In some embodiments, 3.5 ≤ ImgH ≤ 8.3, where ImgH is the image height of the optical lens, representing half the diagonal length of the effective light-sensitive area on the photosensitive element 200. This setting avoids ImgH being too small or too large. If ImgH is too large, it is not conducive to reducing the size of the camera module 400; if ImgH is too small, it is not conducive to the photosensitive element 200 capturing more detailed information of the subject. By setting ImgH to 3.5 ≤ ImgH ≤ 8.3, it is not only ensured that the photosensitive element 200 can capture more detailed information of the subject, which is beneficial to improving the imaging resolution and field of view of the optical lens 100; but it also avoids the camera module 400 being too large.

[0415] The following section provides a detailed description of the optical lens 100 and the specific composition of the lens group within the optical lens 100.

[0416] In some embodiments, such as Figure 3 As shown, the first lens group G1 contains three lenses: a first lens L11 with positive optical power, a second lens L12 with positive optical power, and a third lens L13 with positive optical power. The second lens L12 is positioned between the first lens L11 and the third lens L13. The second lens group G2 contains two lenses: a fourth lens L21 with negative optical power and a fifth lens L22 with negative optical power.

[0417] By setting the number of lenses in the first lens group G1 to three and the number of lenses in the second lens group G2 to two, the number of lenses in the optical lens 100 can be reduced, which simplifies the structure and reduces the size of the optical lens 100. By setting the optical power of the lenses in the first lens group G1 to positive and the optical power of the lenses in the second lens group G2 to negative, the aberrations of the optical lens 100 can be canceled out, thereby further correcting the aberrations of the optical lens 100 and improving the image quality of the optical lens 100.

[0418] In some embodiments, such as Figure 3 As shown, the optical lens 100 also includes a first optical path reversing element 3, which is disposed on the object side of the first lens group G1. This arrangement allows the first optical path reversing element 3 to reversing the optical path of the optical lens 100, thereby reducing the size of the optical lens 100 along the thickness direction Z of the electronic device, and thus facilitating a reduction in the thickness of the electronic device.

[0419] The type of the first optical path switching element 3 is not unique; in some embodiments, such as... Figure 3 As shown, the first optical path deflection element 3 is a prism, including a first prism incident surface 31, a first prism exit surface 32 and a first prism reflecting surface 33. The first prism exit surface 32 is arranged facing the side where the first lens group G1 is located. The first prism reflecting surface 33 is used to reflect the light beam that enters the first optical path deflection element 3 from the first prism incident surface 31 to the first prism exit surface 32.

[0420] Among them, such as Figure 3 As shown, the lens optical axis 10 includes a first lens optical axis 10a and a second lens optical axis 10b. The first lens optical axis 10a and the second lens optical axis 10b have a certain angle, such as 90 degrees. The first prism incident surface 31 is located on the first lens optical axis 10a, and the first prism exit surface 32 is located on the second lens optical axis 10b. The first lens group G1 and the second lens group G2 are arranged along the second lens optical axis 10b.

[0421] like Figure 3 As shown, when the optical lens 100 switches between a short focal length mode and a long focal length mode, the first lens group G1 and the second lens group G2 move along the second lens optical axis 10b. When the optical lens 100 is in a long focal length mode or a short focal length mode, the first lens group G1 is fixed relative to the image plane of the optical lens 100 along the second lens optical axis 10b, and the second lens group G2 can move relative to the first lens group G1 along the second lens optical axis 10b, so that the optical lens 100 can switch between focusing on a distant scene and focusing on a close scene.

[0422] In some embodiments, such as Figure 3As shown, the first optical path deflection element 3 is a right-angle prism. The angle between the first prism incident surface 31 and the first prism exit surface 32 is a right angle. The angle between the first prism reflecting surface 33 and the first prism incident surface 31 and the first prism exit surface 32 is an acute angle, such as 45°.

[0423] The material of the first optical path deflection element 3 can be a light-transmitting material such as glass or resin, and no specific limitation is made here.

[0424] The first optical path deflection element 3 is not limited to a prism; in other embodiments, the first optical path deflection element 3 may also be a reflector.

[0425] In some embodiments, such as Figure 3 As shown, the optical lens 100 also includes a first fixing tube 41 and a second fixing tube 42, with the first lens group G1 installed in the first fixing tube 41 and the second lens group G2 installed in the second fixing tube 42.

[0426] A spacer ring 43 is provided between adjacent pairs of the first lens L11, the second lens L12 and the third lens L13. A limiting flange 411 is provided at one end of the first fixing cylinder 41 and a pressure ring 44 is provided at the other end. The limiting flange 411 and the pressure ring 44 restrict the first lens group G1 within the first fixing cylinder 41.

[0427] Among them, such as Figure 3 As shown, the pressure ring 44 is located at the end of the first fixing cylinder 41 furthest from the second lens group G2 (left end in the figure), and the limiting flange 411 is located at the end of the first fixing cylinder 41 closest to the second lens group G2 (right end in the figure). However, this is not a limitation; the positions of the pressure ring 44 and the limiting flange 411 can be interchanged. Furthermore, at least one of the pressure ring 44 and the limiting flange 411 can be replaced with adhesive to achieve lens position fixation.

[0428] In some embodiments, such as Figure 3 As shown, at least one of the first lens L11, the second lens L12, and the third lens L13 has a light-shielding ring 45 at its edge to eliminate stray light at the edge of the first lens group G1. The light-shielding ring 45 may be located at the edge of the second lens L12.

[0429] In some embodiments, such as Figure 3 As shown, a spacer ring 42 is provided between the fourth lens L21 and the fifth lens L22.

[0430] Of course, in addition to passing through the spacer ring 42, the lenses in the first lens group G1 and the second lens group G2 can also be placed in the limiting groove of the fixed cylinder to separate the lenses.

[0431] In some embodiments, such as Figure 3 As shown, at least one of the fourth lens L21 and the fifth lens L22 has a light-shielding ring 45 at its edge to eliminate stray light at the edge of the second lens group G2. For example, the light-shielding ring 45 can be respectively provided at the edges of the fourth lens L21 and the fifth lens L24.

[0432] Figure 8 This is a schematic diagram of the camera module 400 in the second embodiment of this application. Figure 8 The camera module 400 shown is Figure 3 , Figure 4 The main difference between the camera module 400 shown is that the position of the first optical path deflection element 3 is different, as detailed below:

[0433] like Figure 8 As shown, the first optical path reversing element 3 is disposed between the first lens group G1 and the second lens group G2. This arrangement allows the first optical path reversing element 3 to reversing the optical path of the optical lens 100, thereby reducing the size of the optical lens 100 along the optical axis Y (e.g., the left-right direction shown in the figure) of the second lens group G2. This satisfies the structural layout requirements of electronic devices (the optical lens 100 is well-suited for electronic devices with limited space in the Y direction). Simultaneously, the first lens group G1 and the second lens group G2 are located on the object side and image side of the first optical path reversing element 3, respectively. This increases the length of the optical path between the first lens group G1 and the second lens group G2, optimizing the propagation path of light between them. This facilitates the correction of aberrations in the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0434] The type of the first optical path switching element 3 is not unique; in some embodiments, such as... Figure 8 As shown, the first optical path deflection element 3 is a prism, including a first prism incident surface 31, a first prism exit surface 32, and a first prism reflecting surface 33. The first prism incident surface 31 is disposed facing the side where the first lens group G1 is located, and the first prism exit surface 32 is disposed facing the side where the second lens group G2 is located. The first prism reflecting surface 33 is used to reflect the light beam entering the first optical path deflection element 3 from the first prism incident surface 31 to the first prism exit surface 32.

[0435] Among them, such as Figure 8 As shown, the lens optical axis 10 includes a first lens optical axis 10a and a second lens optical axis 10b. The first lens optical axis 10a and the second lens optical axis 10b have a certain angle, such as 90 degrees. The first lens group G1 is located on the first lens optical axis 10a, and the second lens group G2 is located on the second lens optical axis 10b.

[0436] like Figure 8 As shown, when the optical lens 100 switches between a short focal length mode and a long focal length mode, the first lens group G1 moves along the first lens optical axis 10a, and the second lens group G2 moves along the second lens optical axis 10b. When the optical lens 100 is in a long focal length mode or a short focal length mode, the first lens group G1 is fixed relative to the first optical path deflection element 3 along the first lens optical axis 10a, the first optical path deflection element 3 is fixed relative to the image plane of the optical lens 100 along the second lens optical axis 10b, and the second lens group G2 moves along the second lens optical axis 10b, so that the optical lens 100 switches between focusing on a distant scene and focusing on a close scene.

[0437] In some embodiments, such as Figure 8 As shown, the first optical path deflection element 3 is a right-angle prism. The angle between the first prism incident surface 31 and the first prism exit surface 32 is a right angle. The angle between the first prism reflecting surface 33 and the first prism incident surface 31 and the first prism exit surface 32 is an acute angle, such as 45°.

[0438] The first optical path deflection element 3 is not limited to a prism; in other embodiments, the first optical path deflection element 3 may also be a reflector.

[0439] As for the other structures of the camera module 400 in this embodiment, and the settings of various parameters in the optical lens 100, they can be set with reference to the camera module 400 in the first embodiment, and will not be described in detail here.

[0440] Figure 9 This is a schematic diagram of the camera module 400 in the third embodiment of this application. Figure 9 The camera module 400 shown is Figure 3 , Figure 4 The main difference between the camera module 400 shown is: Figure 9 The optical lens 100 of the camera module 400 is equipped with a second optical path deflection element 5, as detailed below:

[0441] like Figure 9 As shown, the optical lens 100 also includes a second optical path reversing element 5, which is disposed on the image side of the second lens group G2, while the first optical path reversing element 3 is disposed on the object side of the first lens group G1. By providing the second optical path reversing element 5, the optical path of the optical lens 100 can be reversed, thereby reducing the size of the optical lens 100 in the optical axis direction Y of the second lens group G2, thus reducing the space occupied by the optical lens 100 inside the electronic device; at the same time, it is beneficial to control the size of the photosensitive surface (i.e., the image plane) of the photosensitive element 200 in the optical axis direction Y parallel to the second lens group G2, so the photosensitive surface of the photosensitive element 200 can be designed to be larger, reducing the space occupied by the photosensitive element 200 in the thickness direction Z of the electronic device.

[0442] The type of the second optical path switching element 5 is not unique; in some embodiments, such as... Figure 9 As shown, the second optical path deflection element 5 can be a prism, including a second prism incident surface 51, a second prism exit surface 52, and a second prism reflecting surface 53. The second prism incident surface 51 is arranged facing the side where the second lens group G2 is located, the second prism exit surface 52 is arranged facing the side where the image plane of the optical lens 100 is located, and the second prism reflecting surface 53 is used to reflect the light beam entering the second optical path deflection element 5 from the second prism incident surface 51 to the second prism exit surface 52.

[0443] like Figure 9 As shown, the lens optical axis 10 includes a first lens optical axis 10a, a second lens optical axis 10b, and a third lens optical axis 10c. The first lens optical axis 10a and the second lens optical axis 10b have a certain angle, such as 90 degrees, and the third lens optical axis 10c and the second lens optical axis 10b have a certain angle, such as 90 degrees. The second prism incident surface 51 is located on the second lens optical axis 10b, and the second prism exit surface 52 is located on the third lens optical axis 10c. The first lens group G1 and the second lens group G2 are arranged along the second lens optical axis 10b.

[0444] like Figure 9 As shown, when the optical lens 100 switches between a short focal length mode and a long focal length mode, the first lens group G1 and the second lens group G2 move along the second lens optical axis 10b. When the optical lens 100 is in a long focal length mode or a short focal length mode, the first lens group G1 is fixed relative to the second optical path deflection element 5 along the second lens optical axis 10b, the second optical path deflection element 5 is fixed relative to the image plane of the optical lens 100 along the third lens optical axis 10c, and the second lens group G2 can move relative to the first lens group G1 along the second lens optical axis 10b, so that the optical lens 100 can switch between focusing on a distant scene and focusing on a close scene.

[0445] The material of the second optical path deflection element 5 can be a light-transmitting material such as glass or resin, and no specific limitation is made here.

[0446] In some embodiments, such as Figure 9 As shown, the second optical path deflection element 5 is a right-angle prism. The angle between the second prism incident surface 51 and the second prism exit surface 52 is a right angle. The angle between the second prism reflecting surface 53 and the second prism incident surface 51 and the second prism exit surface 51 is an acute angle, such as 45°.

[0447] The second optical path deflection element 5 is not limited to a prism; in other embodiments, the second optical path deflection element 5 may also be a reflector.

[0448] As for the other structures of the camera module 400 in this embodiment, and the settings of various parameters in the optical lens 100, they can be set with reference to the camera module 400 in the first embodiment, and will not be described in detail here.

[0449] Figure 10 This is a schematic diagram of the camera module 400 in the fourth embodiment of this application. Figure 10 The camera module 400 shown is Figure 9 The main difference between the camera module 400 shown is: Figure 9 The second optical path deflection element 5 in the optical lens 100 is positioned differently, as detailed below:

[0450] like Figure 10 As shown, the first optical path reversing element 3 is disposed on the object side of the first lens group G1, and the second optical path reversing element 5 is disposed between the first lens group G1 and the second lens group G2. With this arrangement, the first lens group G1 and the second lens group G2 are located on the object side and image side of the second optical path reversing element 5, respectively. This increases the length of the optical path between the first lens group G1 and the second lens group G2, optimizes the propagation path of light between them, and thus helps correct the aberrations of the optical lens 100.

[0451] The type of the second optical path switching element 5 is not unique; in some embodiments, such as... Figure 10 As shown, the second optical path deflection element 5 can be a prism, including a second prism incident surface 51, a second prism exit surface 52, and a second prism reflecting surface 53. The second prism incident surface 51 is arranged facing the side where the first lens group G1 is located, and the second prism exit surface 52 is arranged facing the side where the second lens group G2 is located. The second prism reflecting surface 53 is used to reflect the light beam entering the second optical path deflection element 5 from the second prism incident surface 51 to the second prism exit surface 52.

[0452] like Figure 10 As shown, the lens optical axis 10 includes a first lens optical axis 10a, a second lens optical axis 10b, and a third lens optical axis 10c. The first lens optical axis 10a and the second lens optical axis 10b have a certain angle, such as 90 degrees, and the third lens optical axis 10c has a certain angle, such as 90 degrees, with the second lens optical axis 10b. The first lens group G1 is located on the second lens optical axis 10b, and the second lens group G3 is located on the third lens optical axis 10c.

[0453] like Figure 10As shown, when the optical lens 100 switches between a short focal length mode and a long focal length mode, the first lens group G1 moves along the second lens optical axis 10b, and the second lens group G2 moves along the third lens optical axis 10c. When the optical lens 100 is in either a long focal length mode or a short focal length mode, the first lens group G1 is fixed relative to the second optical path deflection element 5 along the second lens optical axis 10b, the second optical path deflection element 5 is fixed relative to the image plane of the optical lens 100 along the third lens optical axis 10c, and the second lens group G2 moves along the third lens optical axis 10c, so that the optical lens 100 switches between focusing on a distant scene and focusing on a close scene.

[0454] In some embodiments, such as Figure 10 As shown, the second optical path deflection element 5 is a right-angle prism. The angle between the second prism incident surface 51 and the second prism exit surface 52 is a right angle. The angle between the second prism reflecting surface 53 and the second prism incident surface 51 and the second prism exit surface 51 is an acute angle, such as 45°.

[0455] The second optical path deflection element 5 is not limited to a prism; in other embodiments, the second optical path deflection element 5 may also be a reflector.

[0456] As for the other structures of the camera module 400 in this embodiment, and the settings of various parameters in the optical lens 100, they can be specifically set with reference to the camera module 400 in the third embodiment, and will not be described in detail here.

[0457] Figure 11 This is a schematic diagram of the camera module 400 in the fifth embodiment of this application. Figure 11 The camera module 400 shown is Figure 3 , Figure 4 The main difference between the camera module 400 shown is: Figure 11 The first optical path switching element 3 was removed, as detailed below:

[0458] like Figure 11 As shown, the optical lens 100 is a vertical lens, and the first lens group G1, the second lens group G2, and the photosensitive element 200 are arranged along the optical axis 10 of the lens. The optical axis 10 of the lens can be parallel to the thickness direction Z of the electronic device.

[0459] like Figure 11 As shown, when the optical lens 100 switches between a short focal length mode and a long focal length mode, the first lens group G1 and the second lens group G2 move along the lens optical axis 10. When the optical lens 100 is in a long focal length mode or a short focal length mode, the first lens group G1 is fixed relative to the image plane of the optical lens 100 along the lens optical axis 10, and the second lens group G2 moves relative to the first lens group G1 along the lens optical axis 10, so that the optical lens 100 switches between focusing on a distant scene and focusing on a close scene.

[0460] As for the other structures of the camera module 400 in this embodiment, and the settings of various parameters in the optical lens 100, they can be set with reference to the camera module 400 in the first embodiment, and will not be described in detail here.

[0461] Figure 12a This is a state diagram of the optical lens 100 of the camera module 400 in the sixth embodiment of this application during the focusing and zooming process. Figure 12a The camera module 400 shown is Figure 3 , Figure 4 The main difference between the camera module 400 shown is that the first lens group G1 and the second lens group G2 of the optical lens 100 are configured differently, as described below:

[0462] like Figure 12a As shown, the first lens group G1 has three lenses, namely a first lens L11 with positive optical power, a second lens L12 with negative optical power, and a third lens L13 with positive optical power. The second lens L12 is positioned between the first lens L11 and the third lens L13. The second lens group G2 has three lenses, namely a fourth lens L21 with negative optical power, a fifth lens L22 with positive optical power, and a sixth lens L23 with negative optical power. The fifth lens L22 is positioned between the fourth lens L21 and the sixth lens L23.

[0463] By setting the number of lenses in both the first lens group G1 and the second lens group G2 to three, the number of lenses in the optical lens 100 can be reduced, which simplifies the structure and reduces the size of the optical lens 100. By setting the optical power of the lenses in the first lens group G1 and the second lens group G2 to alternate between positive and negative, the positive and negative aberrations of the optical lens 100 can be canceled out, thereby further correcting the aberrations of the optical lens 100 and improving the image quality of the optical lens 100.

[0464] like Figure 12a As shown in (2) and (3) in the figure, when the optical lens 100 is focusing on a distant scene, during the process of switching the optical lens 100 from the telephoto state to the short focal length state, the first lens group G1 and the second lens group G2 both move towards the image plane (for example, to the right in the figure); during the process of switching the optical lens 100 from the short focal length state to the telephoto state, the first lens group G1 and the second lens group G2 both move away from the image plane (for example, to the left in the figure).

[0465] like Figure 12aAs shown in (1) and (2) in the figure, when the optical lens 100 is in the telephoto state, when the optical lens 100 switches from focusing on the distant view to focusing on the close view, the first lens group G1 is fixed relative to the image plane of the optical lens 100 (such as the photosensitive surface of the photosensitive element 200) along the lens optical axis 10, and the second lens group G2 moves towards the image plane (for example, to the right in the figure); when the optical lens 100 switches from focusing on the close view to focusing on the distant view, the first lens group G1 is fixed relative to the image plane of the optical lens 100 along the lens optical axis 10, and the second lens group G2 moves away from the image plane (for example, to the left in the figure).

[0466] like Figure 12a As shown in (3) and (4) in the figure, when the optical lens 100 is in a short focal length state, when the optical lens 100 switches from focusing on a distant view to focusing on a close view, the first lens group G1 is fixed relative to the image plane of the optical lens 100 along the lens optical axis 10, and the second lens group G2 moves towards the image plane (for example, to the right in the figure); when the optical lens 100 switches from focusing on a close view to focusing on a distant view, the first lens group G1 is fixed relative to the image plane of the optical lens 100 along the lens optical axis 10, and the second lens group G2 moves away from the image plane (for example, to the left in the figure).

[0467] The type of optical lens 100 is not unique. In some embodiments, the optical lens 100 can be a periscope lens, that is, the object side of the first lens group G1 is provided with a first optical path deflection element 3. The first optical path deflection element 3 can be a prism or a mirror, without specific limitation. In other embodiments, the optical lens 100 can also be a vertical lens. For example, the optical lens 100 can be a retractable lens. The optical axis 10 of the optical lens 100 can be parallel to the thickness direction Z of the electronic device. When the optical lens 100 is not in use, the optical lens 100 is retracted towards the side closer to the photosensitive element 200 relative to the rear cover 520 of the electronic device to reduce the back focal length of the optical lens 100, thereby reducing the space occupied by the camera module 400. When the optical lens 100 is in use, the optical lens 100 is extended away from the photosensitive element 200 relative to the rear cover 520 of the electronic device to increase the back focal length of the optical lens 100, thereby providing sufficient movement space for the optical zoom and focusing of the optical lens 100.

[0468] The following section discusses specific parameters. Figure 12a The optical lens 100 shown will be described in detail.

[0469] As shown in Tables 1.1 to 1.3, Table 1.1 shows the main parameters of the optical lens 100 in the sixth embodiment of this application when it is in the short focal length state, Table 1.2 shows the main parameters of the optical lens 100 in the sixth embodiment of this application when it is in the long focal length state, and Table 1.3 shows the aspherical coefficients of each surface of the optical element in the optical lens 100 in the sixth embodiment of this application.

[0470] Table 1.1 Main parameters of the optical lens 100 in the short focal length state in the sixth embodiment of this application

[0471]

[0472] Table 1.2 Main parameters of the optical lens 100 in the telephoto state in the sixth embodiment of this application

[0473]

[0474]

[0475] The units for the parameters of radius of curvature, thickness, and light transmission radius in Tables 1.1 and 1.2 are all mm.

[0476] S0 represents the object surface, i.e. the subject; S1 (STO) represents the aperture stop; S2 represents the object-side surface of the first lens L11, S3 represents the image-side surface of the first lens L11; S4 represents the object-side surface of the second lens L12, S5 represents the image-side surface of the second lens L12; S6 represents the object-side surface of the third lens L13, and S7 represents the image-side surface of the third lens L13.

[0477] S8 represents the object-side surface of the fourth lens L21, S9 represents the image-side surface of the fourth lens L21; S10 represents the object-side surface of the fifth lens L22, S11 represents the image-side surface of the fifth lens L22; S12 represents the object-side surface of the sixth lens L23, and S13 represents the image-side surface of the sixth lens L23.

[0478] IRCF represents an infrared filter, S14 is the object-side surface of the filter, and S15 is the image-side surface of the filter; IMA represents the image plane, which can be the photosensitive surface of the photosensitive element 200.

[0479] In the table, the surface number S is in the "thickness" parameter column. n The corresponding numerical value means surface number S n Surface to surface number S n+1 The distance of the surface along the optical axis; the rule for the sign of the thickness parameter is as follows: Starting with S... n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1A vertex on the right is positive, and a vertex on the left is negative. Thickness (INF) indicates the thickness of the optical lens 100 when focusing on a distant object (i.e., at infinity); Thickness (Macro) indicates the thickness of the optical lens 100 when focusing on a close-up object (i.e., at macro distance).

[0480] The radii of curvature in the table are the radii of curvature of the corresponding surface number at the optical axis; the rules for the sign of the radii of curvature parameter are as follows: Starting with S... n The vertex of the surface is the origin of the calculation; a right center is positive, and a left center is negative. The radius of curvature of INFINITY indicates that the surface corresponding to this parameter is a plane with an infinite radius of curvature.

[0481] It should be noted that the rules for the plus or minus signs before the thickness parameters and the radius of curvature parameters in this table, as well as the surface number S in the "Thickness" parameter column of the table, are as follows. n The explanations of the corresponding numerical values, thickness (INF), and thickness (Macro) also apply to the tables below.

[0482] In some embodiments, the aspherical surfaces in the optical lens 100 can be defined using the following aspherical curve equation:

[0483]

[0484] Where z is the relative distance between a point on the aspherical surface at a distance r from the optical axis and the tangent plane at the intersection point on the optical axis; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; K is the cone coefficient; A i For the i-th order aspherical coefficients, see Table 1.3 for details.

[0485] Table 1.3 Aspherical coefficients of various surfaces of the optical lens 100 in the sixth embodiment of this application

[0486]

[0487]

[0488] Table 1.4 Basic parameters of the optical lens 100 in the sixth embodiment of this application

[0489]

[0490] Table 1.5 Basic parameters of the optical lens 100 in the sixth embodiment of this application (II)

[0491]

[0492]

[0493] Table 1.6 Basic parameters of the optical lens 100 in the sixth embodiment of this application

[0494]

[0495] In Tables 1.4 to 1.6, INF is short for INFINITY, which means that the object distance of the photographed scene is infinite; Macro means that the object distance of the photographed scene is macro, such as 50mm, 100mm, 200mm, 500mm, etc.

[0496] f L11 f is the focal length of the first lens L11. L12 f is the focal length of the second lens L12. L13 f is the focal length of the third lens L13. L21 f is the focal length of the fourth lens L21. L22 f is the focal length of the fifth lens L22. L23 f is the focal length of the sixth lens L23; g1 f is the effective focal length of the first lens group G1. g2 This is the effective focal length of the second lens group G2.

[0497] F is the effective focal length of the optical lens 100 (in any state); F s The effective focal length of optical lens 100 in short focal length mode; F l The effective focal length of the optical lens 100 when it is in telephoto mode.

[0498] α s α is the power distribution ratio of the optical lens 100 when it is in a short focal length state. s =F s / f g1 α l α is the power distribution ratio of the optical lens 100 in its telephoto state. l =F l / f g1 .

[0499] ξ min ξ represents the minimum focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in any state; smin ξ is the minimum focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in short focal length mode; lmin This is the minimum value of the focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in telephoto mode.

[0500] Δ1 is the second optical zoom movement distance of the second lens group G2, Δ2 is the focusing movement distance of the second lens group G2; q is the first optical zoom movement distance of the first lens group G1; Г maxThe maximum optical zoom ratio of the optical lens is 100, Г′ max This is the maximum system zoom ratio of the optical lens 100.

[0501] Combined with Table 1.6 and Figure 12a The first optical zoom movement distance q of the first lens group G1 is 5.546mm, and the first movement distance (i.e., total travel) of the first lens group G1 is 5.546mm; the second optical zoom movement distance Δ1 of the second lens group G2 is 8.367mm; in the short focal length state, the focusing movement distance Δ2 of the second lens group G2 is 3.690mm; in the long focal length state, the focusing movement distance Δ2 of the second lens group G2 is 0.321mm, and the second movement distance Δ (i.e., total travel) of the second lens group G2 is 8.367mm + 3.690mm = 12.057mm.

[0502] Figure 12b This is a graph showing the relationship between the effective focal length of the optical lens 100 and the optical zoom movement distance of the first lens group G1 and the second lens group G2 in the sixth embodiment of this application. From... Figure 12b As can be seen, during the process of switching from short focal length (INF) to long focal length (INF) of optical lens 100, the effective focal length of optical lens 100 gradually increases as the optical zoom moving distance of the first lens group G1 and the second lens group G2 increases; and the optical zoom moving distance (i.e. Δ1) of the second lens group G2 is greater than the optical zoom moving distance (i.e. q) of the first lens group G1, and the second lens group G2 gradually moves closer to the first lens group G1.

[0503] Figure 12c This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens 100 in the short focal length state in the sixth embodiment of this application. Figure 12c As can be seen, during the process of switching from focusing on a distant scene to focusing on a close-up scene, as the focusing distance of the second lens group G2 increases, the distance of the subject that can be clearly imaged gradually decreases.

[0504] Figure 12d This is a graph showing the relationship between the effective focal length and the object distance of the optical lens 100 during focusing in a short focal length state, as described in the sixth embodiment of this application. Figure 12d As can be seen, during the process of switching from focusing on a close-up to focusing on a distant scene, the effective focal length of the optical lens 100 gradually increases as the distance of the subject that can be clearly imaged gradually increases.

[0505] Figure 12eThis is the axial spherical aberration curve of the optical lens 100 in the sixth embodiment of this application when it is in a short focal length state. Figure 12f The field curvature and optical distortion curves of the optical lens 100 in the sixth embodiment of this application when it is in a short focal length state; Figure 12g This is the axial spherical aberration curve of the optical lens 100 in the sixth embodiment of this application when it is in telephoto mode. Figure 12h The field curvature curve and distortion curve of the optical lens 100 in the sixth embodiment of this application when it is in telephoto mode. Figures 12e to 12h The diagram shows axial spherical aberration curves, field curvature curves, and distortion curves corresponding to different wavelengths of the system (illustrated as 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm).

[0506] from Figure 12e and Figure 12g It can be seen that in the paraxial region where the horizontal coordinate is close to 0, the axial spherical aberration curves of each wavelength are relatively concentrated and have a small degree of deviation. This indicates that under paraxial conditions, the spherical aberration of different wavelengths is at a low level, and the optical lens 100 has good control over the convergence of paraxial rays, ensuring the sharpness of paraxial object point imaging and improving the imaging quality of the central area of ​​the image. When the horizontal coordinate increases to both sides, that is, after entering the off-axis region, the spherical aberration curves of each wavelength are significantly dispersed and the value deviating from zero increases, and the spherical aberration increases, but the increase is limited and there is no drastic fluctuation. Therefore, overall, the optical lens 100 has good control over spherical aberration in both short-focal-length and long-focal-length states.

[0507] Figure 12f and Figure 12h The field curvature curves in the figure show the optimal image plane curvature of the optical lens 100 at different image heights (IMGHT). The field curvature curves consist of two curves (solid and dashed lines), representing the field curvature in different meridional and sagittal directions, respectively. The horizontal axis represents the focal position (FOCUS, in millimeters), and the vertical axis represents the image height. It can be seen that, in... Figure 12f and Figure 12h In the figure, although the two field curvature curves are somewhat curved, the overall change is relatively gentle and there are no drastic fluctuations. This indicates that the field curvature of the optical lens 100 does not change much under different image heights, which means that the optical lens 100 has done a good job of correcting field curvature aberrations and can ensure the flatness of the image plane under different fields of view to a certain extent, so that the image quality is relatively uniform at different image heights.

[0508] Figure 12f and Figure 12hThe distortion curve in the image reflects the distortion produced by the optical lens 100. The horizontal axis represents the percentage of distortion (%DISTORTION), and the vertical axis represents the image height (IMGHT). Distortion causes geometric deformation in the image, and is classified into barrel distortion and pincushion distortion, among others. Figure 12f and Figure 12h Looking at the distortion curve, it is close to the vertical axis for most of the image height range, meaning the distortion percentage is less than 3.0%. This indicates that the distortion produced by the optical lens 100 is very small, demonstrating that the optical lens 100 has a good distortion correction effect, ensuring the accuracy of the image geometry and making the image close to the geometry of the real object.

[0509] Figure 13a This is a state diagram of the optical lens 100 of the camera module 400 in the seventh embodiment of this application during the focusing and zooming process. Figure 13a The camera module 400 shown is Figure 12a The main difference between the camera module 400 shown is that the specific parameters of the camera module 400 are different, as detailed below:

[0510] The following section discusses specific parameters. Figure 13a The optical lens 100 shown will be described in detail.

[0511] As shown in Tables 2.1 to 2.3, Table 2.1 shows the main parameters of the optical lens 100 in the seventh embodiment of this application when it is in the short focal length state, Table 2.2 shows the main parameters of the optical lens 100 in the seventh embodiment of this application when it is in the long focal length state, and Table 2.3 shows the aspherical coefficients of each surface of the optical element in the optical lens 100 in the seventh embodiment of this application.

[0512] Table 2.1 Main parameters of the optical lens 100 in the short focal length state in the seventh embodiment of this application

[0513]

[0514]

[0515] Table 2.2 Main parameters of the optical lens 100 in the telephoto state in the seventh embodiment of this application

[0516]

[0517]

[0518] The units for the parameters of radius of curvature, thickness, and light transmission radius in Tables 2.1 and 2.2 are all mm.

[0519] S0 represents the object surface, i.e. the subject; S1 (STO) represents the aperture stop; S2 represents the object-side surface of the first lens L11, S3 represents the image-side surface of the first lens L11; S4 represents the object-side surface of the second lens L12, S5 represents the image-side surface of the second lens L12; S6 represents the object-side surface of the third lens L13, and S7 represents the image-side surface of the third lens L13.

[0520] S8 represents the object-side surface of the fourth lens L21, S9 represents the image-side surface of the fourth lens L21; S10 represents the object-side surface of the fifth lens L22, S11 represents the image-side surface of the fifth lens L22; S13 represents the object-side surface of the sixth lens L23, and S14 represents the image-side surface of the sixth lens L23.

[0521] IRCF represents an infrared filter, S15 is the object-side surface of the filter, and S16 is the image-side surface of the filter; IMA represents the image plane, which can be the photosensitive surface of the photosensitive element 200.

[0522] In some embodiments, the aspherical surfaces in the optical lens 100 can be defined using the following aspherical curve equation:

[0523]

[0524] Where z is the relative distance between a point on the aspherical surface at a distance r from the optical axis and the tangent plane at the intersection point on the optical axis; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; K is the cone coefficient; A i For the i-th order aspherical coefficients, see Table 2.3 for details.

[0525] Table 2.3 Aspherical coefficients of various surfaces of the optical lens 100 in the seventh embodiment of this application

[0526]

[0527]

[0528] Table 2.4 Basic parameters of the optical lens 100 in the seventh embodiment of this application

[0529]

[0530] Table 2.5 Basic parameters of the optical lens 100 in the seventh embodiment of this application

[0531]

[0532] Table 2.6 Basic parameters of the optical lens 100 in the seventh embodiment of this application

[0533]

[0534] In Tables 2.4 to 2.6, INF is short for INFINITY, which means that the object distance of the photographed scene is infinite; Macro means that the object distance of the photographed scene is macro, such as 50mm, 100mm, 200mm, 500mm, etc.

[0535] f L11 f is the focal length of the first lens L11. L12 f is the focal length of the second lens L12. L13 f is the focal length of the third lens L13. L21 f is the focal length of the fourth lens L21. L22 f is the focal length of the fifth lens L22. L23 f is the focal length of the sixth lens L23; g1 f is the effective focal length of the first lens group G1. g2 This is the effective focal length of the second lens group G2.

[0536] F is the effective focal length of the optical lens 100 (in any state); F s The effective focal length of optical lens 100 in short focal length mode; F l The effective focal length of the optical lens 100 when it is in telephoto mode.

[0537] α s α is the power distribution ratio of the optical lens 100 when it is in a short focal length state. s =F s / f g1 α l α is the power distribution ratio of the optical lens 100 in its telephoto state. l =F l / f g1 .

[0538] ξ min ξ represents the minimum focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in any state; smin ξ is the minimum focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in short focal length mode; lmin This is the minimum value of the focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in telephoto mode.

[0539] Δ1 is the second optical zoom movement distance of the second lens group G2, Δ2 is the focusing movement distance of the second lens group G2; q is the first optical zoom movement distance of the first lens group G1; Г max The maximum optical zoom ratio of the optical lens is 100, Г′ max This is the maximum system zoom ratio of the optical lens 100.

[0540] Combined with Table 2.6 and Figure 13a The first optical zoom movement distance q of the first lens group G1 is 2.901mm, and the first movement distance (i.e., total travel) of the first lens group G1 is 2.901mm; the second optical zoom movement distance Δ1 of the second lens group G2 is 3.976mm; in the short focal length state, the focusing movement distance Δ2 of the second lens group G2 is 3.824mm; in the long focal length state, the focusing movement distance Δ2 of the second lens group G2 is 1.307mm, and the second movement distance Δ (i.e., total travel) of the second lens group G2 is 3.976mm + 3.824mm = 7.800mm.

[0541] Figure 13b This is a graph showing the relationship between the effective focal length of the optical lens 100 and the optical zoom movement distance of the first lens group G1 and the second lens group G2 in the seventh embodiment of this application. Figure 13b As can be seen, during the process of switching from short focal length (INF) to long focal length (INF) of optical lens 100, the effective focal length of optical lens 100 gradually increases as the optical zoom moving distance of the first lens group G1 and the second lens group G2 increases; and the optical zoom moving distance (i.e. Δ1) of the second lens group G2 is greater than the optical zoom moving distance (i.e. q) of the first lens group G1, and the second lens group G2 gradually moves closer to the first lens group G1.

[0542] Figure 13c This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens 100 in the short focal length state in the seventh embodiment of this application. Figure 13c As can be seen, during the process of switching from focusing on a distant scene to focusing on a close-up scene, as the focusing distance of the second lens group G2 increases, the distance of the subject that can be clearly imaged gradually decreases.

[0543] Figure 13d This is a graph showing the relationship between the effective focal length and the object distance of the optical lens 100 during focusing in a short focal length state, as described in the seventh embodiment of this application. Figure 13d As can be seen, during the process of switching from focusing on a close-up to focusing on a distant scene, the effective focal length of the optical lens 100 gradually increases as the distance of the subject that can be clearly imaged gradually increases.

[0544] Figure 13e This is the axial spherical aberration curve of the optical lens 100 in the seventh embodiment of this application when it is in a short focal length state. Figure 13fThe field curvature and optical distortion curves of the optical lens 100 in the seventh embodiment of this application when it is in a short focal length state; Figure 13g This is the axial spherical aberration curve of the optical lens 100 in the seventh embodiment of this application when it is in telephoto mode. Figure 13h The field curvature curve and distortion curve of the optical lens 100 in the seventh embodiment of this application when it is in telephoto mode. Figures 13e to 13h The diagram shows axial spherical aberration curves, field curvature curves, and distortion curves corresponding to different wavelengths of the system (illustrated as 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm).

[0545] from Figure 13e and Figure 13g It can be seen that in the paraxial region where the horizontal coordinate is close to 0, the axial spherical aberration curves of each wavelength are relatively concentrated and have a small degree of deviation. This indicates that under paraxial conditions, the spherical aberration of different wavelengths is at a low level, and the optical lens 100 has good control over the convergence of paraxial rays, ensuring the sharpness of paraxial object point imaging and improving the imaging quality of the central area of ​​the image. When the horizontal coordinate increases to both sides, that is, after entering the off-axis region, the spherical aberration curves of each wavelength are significantly dispersed and the value deviating from zero increases, and the spherical aberration increases, but the increase is limited and there is no drastic fluctuation. Therefore, overall, the optical lens 100 has good control over spherical aberration in both short-focal-length and long-focal-length states.

[0546] Figure 13f and Figure 13h The field curvature curves in the figure show the optimal image plane curvature of the optical lens 100 at different image heights (IMGHT). The field curvature curves consist of two curves (solid and dashed lines), representing the field curvature in different meridional and sagittal directions, respectively. The horizontal axis represents the focal position (FOCUS, in millimeters), and the vertical axis represents the image height. It can be seen that, in... Figure 13f and Figure 13h In the figure, although the two field curvature curves are somewhat curved, the overall change is relatively gentle and there are no drastic fluctuations. This indicates that the field curvature of the optical lens 100 does not change much under different image heights, which means that the optical lens 100 has done a good job of correcting field curvature aberrations and can ensure the flatness of the image plane under different fields of view to a certain extent, so that the image quality is relatively uniform at different image heights.

[0547] Figure 13f and Figure 13h The distortion curve in the image reflects the distortion produced by the optical lens 100. The horizontal axis represents the percentage of distortion (%DISTORTION), and the vertical axis represents the image height (IMGHT). Distortion causes geometric deformation in the image, and is classified into barrel distortion and pincushion distortion, among others. Figure 13fand Figure 13h Looking at the distortion curve, it is close to the vertical axis for most of the image height range, meaning the distortion percentage is less than 2.0%. This indicates that the distortion produced by the optical lens 100 is very small, demonstrating that the optical lens 100 has a good distortion correction effect, ensuring the accuracy of the image geometry and making the image close to the geometry of the real object.

[0548] Figure 14a This is a state diagram of the optical lens 100 of the camera module 400 in the eighth embodiment of this application during the focusing and zooming process. Figure 14a The camera module 400 shown is Figure 12a The main difference between the camera module 400 shown is that the specific parameters of the camera module 400 are different, as detailed below:

[0549] The following section discusses specific parameters. Figure 14a The optical lens 100 shown will be described in detail.

[0550] As shown in Tables 3.1 to 3.3, Table 3.1 shows the main parameters of the optical lens 100 in the eighth embodiment of this application when it is in the short focal length state, Table 3.2 shows the main parameters of the optical lens 100 in the eighth embodiment of this application when it is in the long focal length state, and Table 3.3 shows the aspherical coefficients of each surface of the optical element in the optical lens 100 in the eighth embodiment of this application.

[0551] Table 3.1 Main parameters of the optical lens 100 in the eighth embodiment of this application when it is in short focal length mode

[0552]

[0553]

[0554] Table 3.2 Main parameters of the optical lens 100 in the telephoto state in the eighth embodiment of this application

[0555]

[0556]

[0557] The units for the parameters of radius of curvature, thickness, and light transmission radius in Tables 3.1 and 3.2 are all mm.

[0558] S0 represents the object surface, i.e. the subject; S1 (STO) represents the aperture stop; S2 represents the object-side surface of the first lens L11, S3 represents the image-side surface of the first lens L11; S4 represents the object-side surface of the second lens L12, S5 represents the image-side surface of the second lens L12; S6 represents the object-side surface of the third lens L13, and S7 represents the image-side surface of the third lens L13.

[0559] S8 represents the object-side surface of the fourth lens L21, S9 represents the image-side surface of the fourth lens L21; S10 represents the object-side surface of the fifth lens L22, S11 represents the image-side surface of the fifth lens L22; S13 represents the object-side surface of the sixth lens L23, and S14 represents the image-side surface of the sixth lens L23.

[0560] IRCF represents an infrared filter, S15 is the object-side surface of the filter, and S16 is the image-side surface of the filter; IMA represents the image plane, which can be the photosensitive surface of the photosensitive element 200.

[0561] In some embodiments, the aspherical surfaces in the optical lens 100 can be defined using the following aspherical curve equation:

[0562]

[0563] Where z is the relative distance between a point on the aspherical surface at a distance r from the optical axis and the tangent plane at the intersection point on the optical axis; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; K is the cone coefficient; A i For the i-th order aspherical coefficients, see Table 3.3 for details.

[0564] Table 3.3 Aspherical coefficients of various surfaces of the optical lens 100 in the eighth embodiment of this application

[0565]

[0566]

[0567]

[0568] Table 3.4 Basic parameters of the optical lens 100 in the eighth embodiment of this application

[0569]

[0570] Table 3.5 Basic parameters of the optical lens 100 in the eighth embodiment of this application (II)

[0571]

[0572] Table 3.6 Basic parameters of the optical lens 100 in the eighth embodiment of this application

[0573]

[0574] In Tables 3.4 to 3.6, INF is short for INFINITY, which means that the object distance of the photographed scene is infinite; Macro means that the object distance of the photographed scene is macro, such as 50mm, 100mm, 200mm, 500mm, etc.

[0575] f L11 f is the focal length of the first lens L11. L12 f is the focal length of the second lens L12. L13 f is the focal length of the third lens L13. L21 f is the focal length of the fourth lens L21. L22 f is the focal length of the fifth lens L22. L23 f is the focal length of the sixth lens L23; g1 f is the effective focal length of the first lens group G1. g2 This is the effective focal length of the second lens group G2.

[0576] F is the effective focal length of the optical lens 100 (in any state); F s The effective focal length of optical lens 100 in short focal length mode; F l The effective focal length of the optical lens 100 when it is in telephoto mode.

[0577] α s α is the power distribution ratio of the optical lens 100 when it is in a short focal length state. s =F s / f g1 α l α is the power distribution ratio of the optical lens 100 in its telephoto state. l =F l / f g1 .

[0578] ξ min ξ represents the minimum focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in any state; smin ξ is the minimum focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in short focal length mode; lmin This is the minimum value of the focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in telephoto mode.

[0579] Δ1 is the second optical zoom movement distance of the second lens group G2, Δ2 is the focusing movement distance of the second lens group G2; q is the first optical zoom movement distance of the first lens group G1; Г max The maximum optical zoom ratio of the optical lens is 100, Гˊ max This is the maximum system zoom ratio of the optical lens 100.

[0580] Combined with Table 3.6 and Figure 14aThe first optical zoom movement distance q of the first lens group G1 is 12.732mm, and the first movement distance (i.e., total travel) of the first lens group G1 is 12.732mm; the second optical zoom movement distance Δ1 of the second lens group G2 is 17.551mm; in the short focal length state, the focusing movement distance Δ2 of the second lens group G2 is 0.691mm; in the long focal length state, the focusing movement distance Δ2 of the second lens group G2 is 2.501mm, and the second movement distance Δ (i.e., total travel) of the second lens group G2 is 17.551mm + 0.691mm = 18.242mm.

[0581] Figure 14b This is a graph showing the relationship between the effective focal length of the optical lens 100 and the optical zoom movement distance of the first lens group G1 and the second lens group G2 in the eighth embodiment of this application. Figure 14b As can be seen, during the process of switching from short focal length (INF) to long focal length (INF) of optical lens 100, the effective focal length of optical lens 100 gradually increases as the optical zoom moving distance of the first lens group G1 and the second lens group G2 increases; and the optical zoom moving distance (i.e. Δ1) of the second lens group G2 is greater than the optical zoom moving distance (i.e. q) of the first lens group G1, and the second lens group G2 gradually moves closer to the first lens group G1.

[0582] Figure 14c This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens 100 in the short focal length state in the eighth embodiment of this application. Figure 14c As can be seen, during the process of switching from focusing on a distant scene to focusing on a close-up scene, as the focusing distance of the second lens group G2 increases, the distance of the subject that can be clearly imaged gradually decreases.

[0583] Figure 14d This is a graph showing the relationship between the effective focal length and the object distance of the optical lens 100 during focusing in a short focal length state, as described in the eighth embodiment of this application. Figure 14d As can be seen, during the process of switching from focusing on a close-up to focusing on a distant scene, the effective focal length of the optical lens 100 gradually increases as the distance of the subject that can be clearly imaged gradually increases.

[0584] Figure 14e This is the axial spherical aberration curve of the optical lens 100 in the eighth embodiment of this application when it is in a short focal length state. Figure 14f The field curvature and optical distortion curves of the optical lens 100 in the eighth embodiment of this application when it is in a short focal length state; Figure 14g This is the axial spherical aberration curve of the optical lens 100 in the eighth embodiment of this application when it is in a telephoto state. Figure 14h The field curvature curve and distortion curve of the optical lens 100 in the eighth embodiment of this application when it is in telephoto mode. Figures 14e to 14h The diagram shows axial spherical aberration curves, field curvature curves, and distortion curves corresponding to different wavelengths of the system (illustrated as 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm).

[0585] from Figure 14e and Figure 14g It can be seen that in the paraxial region where the horizontal coordinate is close to 0, the axial spherical aberration curves of each wavelength are relatively concentrated and have a small degree of deviation. This indicates that under paraxial conditions, the spherical aberration of different wavelengths is at a low level, and the optical lens 100 has good control over the convergence of paraxial rays, ensuring the sharpness of paraxial object point imaging and improving the imaging quality of the central area of ​​the image. When the horizontal coordinate increases to both sides, that is, after entering the off-axis region, the spherical aberration curves of each wavelength are significantly dispersed and the value deviating from zero increases, and the spherical aberration increases, but the increase is limited and there is no drastic fluctuation. Therefore, overall, the optical lens 100 has good control over spherical aberration in both short-focal-length and long-focal-length states.

[0586] Figure 14f and Figure 14h The field curvature curves in the figure show the optimal image plane curvature of the optical lens 100 at different image heights (IMGHT). The field curvature curves consist of two curves (solid and dashed lines), representing the field curvature in different meridional and sagittal directions, respectively. The horizontal axis represents the focal position (FOCUS, in millimeters), and the vertical axis represents the image height. It can be seen that, in... Figure 14f and Figure 14h In the figure, although the two field curvature curves are somewhat curved, the overall change is relatively gentle and there are no drastic fluctuations. This indicates that the field curvature of the optical lens 100 does not change much under different image heights, which means that the optical lens 100 has done a good job of correcting field curvature aberrations and can ensure the flatness of the image plane under different fields of view to a certain extent, so that the image quality is relatively uniform at different image heights.

[0587] Figure 14f and Figure 14h The distortion curve in the image reflects the distortion produced by the optical lens 100. The horizontal axis represents the percentage of distortion (%DISTORTION), and the vertical axis represents the image height (IMGHT). Distortion causes geometric deformation in the image, and is classified into barrel distortion and pincushion distortion, among others. Figure 14f and Figure 14hLooking at the distortion curve, it is close to the vertical axis for most of the image height range, meaning the distortion percentage is less than 2.0%. This indicates that the distortion produced by the optical lens 100 is very small, demonstrating that the optical lens 100 has a good distortion correction effect, ensuring the accuracy of the image geometry and making the image close to the geometry of the real object.

[0588] Figure 15a This is a state diagram of the optical lens 100 of the camera module 400 in the ninth embodiment of this application during the focusing and zooming process. Figure 15a The camera module 400 shown is Figure 12a The main difference between the camera module 400 shown is that the specific parameters of the camera module 400 are different, as detailed below:

[0589] The following section discusses specific parameters. Figure 15a The optical lens 100 shown will be described in detail.

[0590] As shown in Tables 4.1 to 4.3, Table 4.1 shows the main parameters of the optical lens 100 in the ninth embodiment of this application when it is in the short focal length state, Table 4.2 shows the main parameters of the optical lens 100 in the ninth embodiment of this application when it is in the long focal length state, and Table 4.3 shows the aspherical coefficients of each surface of the optical element in the optical lens 100 in the ninth embodiment of this application.

[0591] Table 4.1 Main parameters of the optical lens 100 in the short focal length state in the ninth embodiment of this application

[0592]

[0593] Table 4.2 Main parameters of the optical lens 100 in the telephoto state in the ninth embodiment of this application

[0594]

[0595]

[0596] The units for the parameters of radius of curvature, thickness, and light transmission radius in Tables 4.1 and 4.2 are all mm.

[0597] S0 represents the object surface, i.e. the subject; S1 (STO) represents the aperture stop; S2 represents the object-side surface of the first lens L11, S3 represents the image-side surface of the first lens L11; S4 represents the object-side surface of the second lens L12, S5 represents the image-side surface of the second lens L12; S6 represents the object-side surface of the third lens L13, and S7 represents the image-side surface of the third lens L13.

[0598] S8 represents the object-side surface of the fourth lens L21, S9 represents the image-side surface of the fourth lens L21; S10 represents the object-side surface of the fifth lens L22, S11 represents the image-side surface of the fifth lens L22; S13 represents the object-side surface of the sixth lens L23, and S14 represents the image-side surface of the sixth lens L23.

[0599] IRCF represents an infrared filter, S15 is the object-side surface of the filter, and S16 is the image-side surface of the filter; IMA represents the image plane, which can be the photosensitive surface of the photosensitive element 200.

[0600] In some embodiments, the aspherical surfaces in the optical lens 100 can be defined using the following aspherical curve equation:

[0601]

[0602] Where z is the relative distance between a point on the aspherical surface at a distance r from the optical axis and the tangent plane at the intersection point on the optical axis; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; K is the cone coefficient; A i For the i-th order aspherical coefficients, see Table 4.3 for details.

[0603] Table 4.3 Aspherical coefficients of various surfaces of the optical lens 100 in the ninth embodiment of this application

[0604]

[0605]

[0606]

[0607] Table 4.4 Basic parameters of the optical lens 100 in the ninth embodiment of this application

[0608]

[0609] Table 4.5 Basic parameters of the optical lens 100 in the ninth embodiment of this application (II)

[0610]

[0611] Table 4.6 Basic parameters of the optical lens 100 in the ninth embodiment of this application

[0612]

[0613] In Tables 4.4 to 4.6, INF is short for INFINITY, which means that the object distance of the photographed scene is infinite; Macro means that the object distance of the photographed scene is macro, such as 50mm, 100mm, 200mm, 500mm, etc.

[0614] f L11 f is the focal length of the first lens L11. L12 f is the focal length of the second lens L12. L13 f is the focal length of the third lens L13. L21 f is the focal length of the fourth lens L21. L22 f is the focal length of the fifth lens L22. L23 f is the focal length of the sixth lens L23; g1 f is the effective focal length of the first lens group G1. g2 This is the effective focal length of the second lens group G2.

[0615] F is the effective focal length of the optical lens 100 (in any state); F s The effective focal length of optical lens 100 in short focal length mode; F l The effective focal length of the optical lens 100 when it is in telephoto mode.

[0616] α s α is the power distribution ratio of the optical lens 100 when it is in a short focal length state. s =F s / f g1 α l α is the power distribution ratio of the optical lens 100 in its telephoto state. l =F l / f g1 .

[0617] ξ min ξ represents the minimum focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in any state; smin ξ is the minimum focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in short focal length mode; lmin This is the minimum value of the focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in telephoto mode.

[0618] Δ1 is the second optical zoom movement distance of the second lens group G2, Δ2 is the focusing movement distance of the second lens group G2; q is the first optical zoom movement distance of the first lens group G1; Г max The maximum optical zoom ratio of the optical lens is 100, Гˊ max This is the maximum system zoom ratio of the optical lens 100.

[0619] Combined with Table 4.6 and Figure 15aThe first optical zoom movement distance q of the first lens group G1 is 13.960mm, and the first movement distance (i.e., total travel) of the first lens group G1 is 13.960mm; the second optical zoom movement distance Δ1 of the second lens group G2 is 19.303mm; in the short focal length state, the focusing movement distance Δ2 of the second lens group G2 is 0.661mm; in the long focal length state, the focusing movement distance Δ2 of the second lens group G2 is 3.061mm, and the second movement distance Δ (i.e., total travel) of the second lens group G2 is 19.303mm + 0.661mm = 19.964mm.

[0620] Figure 15b This is a graph showing the relationship between the effective focal length of the optical lens 100 and the optical zoom movement distance of the first lens group G1 and the second lens group G2 in the ninth embodiment of this application. Figure 15b As can be seen, during the process of switching from short focal length (INF) to long focal length (INF) of optical lens 100, the effective focal length of optical lens 100 gradually increases as the optical zoom moving distance of the first lens group G1 and the second lens group G2 increases; and the optical zoom moving distance (i.e. Δ1) of the second lens group G2 is greater than the optical zoom moving distance (i.e. q) of the first lens group G1, and the second lens group G2 gradually moves closer to the first lens group G1.

[0621] Figure 15c This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens 100 in the short focal length state in the ninth embodiment of this application. Figure 15c As can be seen, during the process of switching from focusing on a distant scene to focusing on a close-up scene, as the focusing distance of the second lens group G2 increases, the distance of the subject that can be clearly imaged gradually decreases.

[0622] Figure 15d This is a graph showing the relationship between the effective focal length and the object distance of the optical lens 100 during focusing in a short focal length state, as described in the ninth embodiment of this application. Figure 15d As can be seen, during the process of switching from focusing on a close-up to focusing on a distant scene, the effective focal length of the optical lens 100 gradually increases as the distance of the subject that can be clearly imaged gradually increases.

[0623] Figure 15e This is the axial spherical aberration curve of the optical lens 100 in the ninth embodiment of this application when it is in a short focal length state. Figure 15f The field curvature and optical distortion curves of the optical lens 100 in the ninth embodiment of this application when it is in a short focal length state; Figure 15g This is the axial spherical aberration curve of the optical lens 100 in the ninth embodiment of this application when it is in telephoto mode. Figure 15h The field curvature curve and distortion curve of the optical lens 100 in the ninth embodiment of this application when in telephoto mode. Figures 15e to 15h The diagram shows axial spherical aberration curves, field curvature curves, and distortion curves corresponding to different wavelengths of the system (illustrated as 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm).

[0624] from Figure 15e and Figure 15g It can be seen that in the paraxial region where the horizontal coordinate is close to 0, the axial spherical aberration curves of each wavelength are relatively concentrated and have a small degree of deviation. This indicates that under paraxial conditions, the spherical aberration of different wavelengths is at a low level, and the optical lens 100 has good control over the convergence of paraxial rays, ensuring the sharpness of paraxial object point imaging and improving the imaging quality of the central area of ​​the image. When the horizontal coordinate increases to both sides, that is, after entering the off-axis region, the spherical aberration curves of each wavelength are significantly dispersed and the value deviating from zero increases, and the spherical aberration increases, but the increase is limited and there is no drastic fluctuation. Therefore, overall, the optical lens 100 has good control over spherical aberration in both short-focal-length and long-focal-length states.

[0625] Figure 15f and Figure 15h The field curvature curves in the figure show the optimal image plane curvature of the optical lens 100 at different image heights (IMGHT). The field curvature curves consist of two curves (solid and dashed lines), representing the field curvature in different meridional and sagittal directions, respectively. The horizontal axis represents the focal position (FOCUS, in millimeters), and the vertical axis represents the image height. It can be seen that, in... Figure 15f and Figure 15h In the figure, although the two field curvature curves are somewhat curved, the overall change is relatively gentle and there are no drastic fluctuations. This indicates that the field curvature of the optical lens 100 does not change much under different image heights, which means that the optical lens 100 has done a good job of correcting field curvature aberrations and can ensure the flatness of the image plane under different fields of view to a certain extent, so that the image quality is relatively uniform at different image heights.

[0626] Figure 15f and Figure 15h The distortion curve in the image reflects the distortion produced by the optical lens 100. The horizontal axis represents the percentage of distortion (%DISTORTION), and the vertical axis represents the image height (IMGHT). Distortion causes geometric deformation in the image, and is classified into barrel distortion and pincushion distortion, among others. Figure 15f and Figure 15hLooking at the distortion curve, it is close to the vertical axis for most of the image height range, meaning the distortion percentage is less than 2.0%. This indicates that the distortion produced by the optical lens 100 is very small, demonstrating that the optical lens 100 has a good distortion correction effect, ensuring the accuracy of the image geometry and making the image close to the geometry of the real object.

[0627] Figure 16a This is a state diagram of the optical lens 100 of the camera module 400 in the tenth embodiment of this application during the focusing and zooming process. Figure 16a The camera module 400 shown is Figure 12a The main difference between the camera module 400 shown is that the specific parameters of the camera module 400 are different, as detailed below:

[0628] The following section discusses specific parameters. Figure 16a The optical lens 100 shown will be described in detail.

[0629] As shown in Tables 5.1 to 5.3, Table 5.1 shows the main parameters of the optical lens 100 in the tenth embodiment of this application when it is in the short focal length state, Table 5.2 shows the main parameters of the optical lens 100 in the tenth embodiment of this application when it is in the long focal length state, and Table 5.3 shows the aspherical coefficients of each surface of the optical element in the optical lens 100 in the tenth embodiment of this application.

[0630] Table 5.1 Main parameters of the optical lens 100 in the short focal length state in the tenth embodiment of this application

[0631]

[0632] Table 5.2 Main parameters of the optical lens 100 in the tenth embodiment of this application when it is in telephoto mode

[0633]

[0634]

[0635] The units for the parameters of radius of curvature, thickness, and light transmission radius in Tables 5.1 and 5.2 are all mm.

[0636] S0 represents the object surface, i.e. the subject; S1 (STO) represents the aperture stop; S2 represents the object-side surface of the first lens L11, S3 represents the image-side surface of the first lens L11; S4 represents the object-side surface of the second lens L12, S5 represents the image-side surface of the second lens L12; S6 represents the object-side surface of the third lens L13, and S7 represents the image-side surface of the third lens L13.

[0637] S8 represents the object-side surface of the fourth lens L21, S9 represents the image-side surface of the fourth lens L21; S10 represents the object-side surface of the fifth lens L22, S11 represents the image-side surface of the fifth lens L22; S13 represents the object-side surface of the sixth lens L23, and S14 represents the image-side surface of the sixth lens L23.

[0638] IRCF represents an infrared filter, S15 is the object-side surface of the filter, and S16 is the image-side surface of the filter; IMA represents the image plane, which can be the photosensitive surface of the photosensitive element 200.

[0639] In some embodiments, the aspherical surfaces in the optical lens 100 can be defined using the following aspherical curve equation:

[0640]

[0641] Where z is the relative distance between a point on the aspherical surface at a distance r from the optical axis and the tangent plane at the intersection point on the optical axis; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; K is the cone coefficient; A i For the i-th order aspherical coefficients, see Table 5.3 for details.

[0642] Table 5.3 Aspherical coefficients of various surfaces of the optical lens 100 in the tenth embodiment of this application

[0643]

[0644]

[0645]

[0646] Table 5.4 Basic parameters of the optical lens 100 in the tenth embodiment of this application

[0647]

[0648] Table 5.5 Basic parameters of the optical lens 100 in the tenth embodiment of this application (II)

[0649]

[0650] Table 5.6 Basic parameters of the optical lens 100 in the tenth embodiment of this application (Part 3)

[0651]

[0652] In Tables 5.4 to 5.6, INF is short for INFINITY, which means that the object distance of the photographed scene is infinite; Macro means that the object distance of the photographed scene is macro, such as 50mm, 100mm, 200mm, 500mm, etc.

[0653] f L11 f is the focal length of the first lens L11. L12 f is the focal length of the second lens L12. L13 f is the focal length of the third lens L13. L21 f is the focal length of the fourth lens L21. L22 f is the focal length of the fifth lens L22. L23 f is the focal length of the sixth lens L23; g1 f is the effective focal length of the first lens group G1. g2 This is the effective focal length of the second lens group G2.

[0654] F is the effective focal length of the optical lens 100 (in any state); F s The effective focal length of optical lens 100 in short focal length mode; F l The effective focal length of the optical lens 100 when it is in telephoto mode.

[0655] α s α is the power distribution ratio of the optical lens 100 when it is in a short focal length state. s =F s / f g1 α l α is the power distribution ratio of the optical lens 100 in its telephoto state. l =F l / f g1 .

[0656] ξ min ξ represents the minimum focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in any state; smin ξ is the minimum focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in short focal length mode; lmin This is the minimum value of the focusing stroke compression ratio of the second lens group G2 when the optical lens 100 is in telephoto mode.

[0657] Δ1 is the second optical zoom movement distance of the second lens group G2, Δ2 is the focusing movement distance of the second lens group G2; q is the first optical zoom movement distance of the first lens group G1; Г max The maximum optical zoom ratio of the optical lens is 100, Гˊ max This is the maximum system zoom ratio of the optical lens 100.

[0658] Combined with Table 5.6 and Figure 16aThe first optical zoom movement distance q of the first lens group G1 is 19.941mm, and the first movement distance (i.e., total travel) of the first lens group G1 is 19.941mm; the second optical zoom movement distance Δ1 of the second lens group G2 is 27.572mm; in the short focal length state, the focusing movement distance Δ2 of the second lens group G2 is 1.089mm; in the long focal length state, the focusing movement distance Δ2 of the second lens group G2 is 6.812mm, and the second movement distance Δ (i.e., total travel) of the second lens group G2 is 27.572mm + 1.089mm = 28.661mm.

[0659] Figure 16b This is a graph showing the relationship between the effective focal length of the optical lens 100 and the optical zoom movement distance of the first lens group G1 and the second lens group G2 in the tenth embodiment of this application. Figure 16b As can be seen, during the process of switching from short focal length (INF) to long focal length (INF) of optical lens 100, the effective focal length of optical lens 100 gradually increases as the optical zoom moving distance of the first lens group G1 and the second lens group G2 increases; and the optical zoom moving distance (i.e. Δ1) of the second lens group G2 is greater than the optical zoom moving distance (i.e. q) of the first lens group G1, and the second lens group G2 gradually moves closer to the first lens group G1.

[0660] Figure 16c This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens 100 in the short focal length state in the tenth embodiment of this application. Figure 16c As can be seen, during the process of switching from focusing on a distant scene to focusing on a close-up scene, as the focusing distance of the second lens group G2 increases, the distance of the subject that can be clearly imaged gradually decreases.

[0661] Figure 16d This is a graph showing the relationship between the effective focal length and the object distance of the optical lens 100 during focusing in a short focal length state, as described in the tenth embodiment of this application. Figure 16d As can be seen, during the process of switching from focusing on a close-up to focusing on a distant scene, the effective focal length of the optical lens 100 gradually increases as the distance of the subject that can be clearly imaged gradually increases.

[0662] Figure 16e This is a graph showing the relationship between the focusing distance of the second lens group G2 and the object distance during the focusing process of the optical lens 100 in the telephoto state in the tenth embodiment of this application. Figure 16e As can be seen, during the process of switching from focusing on a distant scene to focusing on a close-up scene, as the focusing distance of the second lens group G2 increases, the distance of the subject that can be clearly imaged gradually decreases.

[0663] Figure 16f This is a graph showing the relationship between the effective focal length and the object distance of the optical lens 100 during focusing in telephoto mode, as described in the tenth embodiment of this application. Figure 16f As can be seen, during the process of switching from focusing on a close-up to focusing on a distant scene, the effective focal length of the optical lens 100 gradually increases as the distance of the subject that can be clearly imaged gradually increases.

[0664] Figure 16g This is the axial spherical aberration curve of the optical lens 100 in the tenth embodiment of this application when it is in a short focal length state. Figure 16h The field curvature and optical distortion curves of the optical lens 100 in the tenth embodiment of this application when it is in a short focal length state; Figure 16i This is the axial spherical aberration curve of the optical lens 100 in the tenth embodiment of this application when it is in telephoto mode. Figure 16j The field curvature curve and distortion curve of the optical lens 100 in the tenth embodiment of this application when it is in telephoto mode. Figures 16g to 16j The diagram shows axial spherical aberration curves, field curvature curves, and distortion curves corresponding to different wavelengths of the system (illustrated as 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm).

[0665] from Figure 16g and Figure 16i It can be seen that in the paraxial region where the horizontal coordinate is close to 0, the axial spherical aberration curves of each wavelength are relatively concentrated and have a small degree of deviation. This indicates that under paraxial conditions, the spherical aberration of different wavelengths is at a low level, and the optical lens 100 has good control over the convergence of paraxial rays, ensuring the sharpness of paraxial object point imaging and improving the imaging quality of the central area of ​​the image. When the horizontal coordinate increases to both sides, that is, after entering the off-axis region, the spherical aberration curves of each wavelength are significantly dispersed and the value deviating from zero increases, and the spherical aberration increases, but the increase is limited and there is no drastic fluctuation. Therefore, overall, the optical lens 100 has good control over spherical aberration in both short-focal-length and long-focal-length states.

[0666] Figure 16h and Figure 16j The field curvature curves in the figure show the optimal image plane curvature of the optical lens 100 at different image heights (IMGHT). The field curvature curves consist of two curves (solid and dashed lines), representing the field curvature in different meridional and sagittal directions, respectively. The horizontal axis represents the focal position (FOCUS, in millimeters), and the vertical axis represents the image height. It can be seen that, in... Figure 16h and Figure 16jIn the figure, although the two field curvature curves are somewhat curved, the overall change is relatively gentle and there are no drastic fluctuations. This indicates that the field curvature of the optical lens 100 does not change much under different image heights, which means that the optical lens 100 has done a good job of correcting field curvature aberrations and can ensure the flatness of the image plane under different fields of view to a certain extent, so that the image quality is relatively uniform at different image heights.

[0667] Figure 16h and Figure 16j The distortion curve in the image reflects the distortion produced by the optical lens 100. The horizontal axis represents the percentage of distortion (%DISTORTION), and the vertical axis represents the image height (IMGHT). Distortion causes geometric deformation in the image, and is classified into barrel distortion and pincushion distortion, among others. Figure 16h and Figure 16j Looking at the distortion curve, it is close to the vertical axis for most of the image height range, meaning the distortion percentage is less than 2.0%. This indicates that the distortion produced by the optical lens 100 is very small, demonstrating that the optical lens 100 has a good distortion correction effect, ensuring the accuracy of the image geometry and making the image close to the geometry of the real object.

[0668] The following is a summary of some key parameters of the optical lens 100 in some embodiments of this application:

[0669] Table 6.1 Back focal length (BFL) values ​​of the optical lens 100 in some embodiments of this application in short focal length and long focal length states; unit is mm.

[0670]

[0671] Table 6.2 shows the gap width δ between the second lens group G2 and the first lens group G1 in some embodiments of the optical lens 100 in short focal length and long focal length states; the unit is mm.

[0672]

[0673] Table 6.3 Values ​​of the first optical zoom movement distance q and the second optical zoom movement distance Δ1 of the optical lens 100 in some embodiments of this application; unit: mm

[0674] First optical zoom movement distance q Second optical zoom movement distance Δ1 Sixth Embodiment 5.546 8.367 Seventh Embodiment 2.901 3.976 Eighth embodiment 12.732 17.551 Ninth Embodiment 13.960 19.303 Tenth Embodiment 19.941 27.572

[0675] Table 6.4 Values ​​of the first optical zoom movement distance q and the second optical zoom movement distance Δ1 of the optical lens 100 in some embodiments of this application; unit: mm

[0676]

[0677] Table 6.5 Values ​​of the power distribution ratio α of the optical lens 100 in some embodiments of this application

[0678]

[0679]

[0680] Table 6.6 Minimum focusing stroke compression ratio ξ of optical lens 100 in some embodiments of this application min value

[0681]

[0682] Table 6.7 Relationships of optical lens 100 in some embodiments of this application The value (in mm) and the value of k

[0683]

[0684] Table 6.8 The closest focusing distance U of the optical lens 100 in some embodiments of this application 1min The value of ′ (in mm)

[0685]

[0686] Table 6.9 Values ​​of effective focal length, maximum optical zoom ratio, and maximum system zoom ratio of the optical lens 100 in some embodiments of this application; the unit of effective focal length is mm.

[0687] <![CDATA[Maximum optical zoom ratioГ max > <![CDATA[Maximum system zoom ratio Г′ max > Sixth Embodiment 1.33 1.77 Seventh Embodiment 1.22 1.99 Eighth embodiment 1.92 2.06 Ninth Embodiment 2 2.12 Tenth Embodiment 2 2.14

[0688] The types of cross-sectional lines in the accompanying drawings are for distinguishing different components and should not be construed as limiting the materials of the components. The accompanying drawings are for illustrating structural composition and are not shown to scale of the actual product.

[0689] While the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may arise based on the claims of this application. To provide a thorough understanding of this application, many specific details are included in the above description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0690] In the embodiments of this application, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," "third," "fourth," and "fifth" may explicitly or implicitly include one or more of that feature.

[0691] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0692] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to at least two.

[0693] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0694] 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 scope of the technical solutions of the embodiments of this application.

Claims

1. An optical lens, characterized in that, It includes two lens groups, which are all the lens groups of the optical lens and are arranged along the optical axis (10) of the optical lens. The two lens groups are a first lens group (G1) with positive optical power and a second lens group (G2) with negative optical power. The second lens group (G2) is disposed on the image side of the first lens group (G1). The optical lens has a short focal length state and a long focal length state. When the optical lens zooms between the short focal length state and the long focal length state, the first lens group (G1) and the second lens group (G2) can move along the optical axis (10) of the lens respectively, and the distance between the first lens group (G1) and the second lens group (G2) changes. When the optical lens switches between the short focal length state and the long focal length state, the maximum value of the first moving distance of the first lens group (G1) along the object side direction or the image side direction toward the first lens group (G1) is less than or equal to 20mm. The maximum value of the second moving distance of the second lens group (G2) along the object-side direction or image-side direction toward the second lens group (G2) is less than or equal to 29 mm.

2. The optical lens according to claim 1, characterized in that, The first moving distance includes the first optical zoom moving distance q; The first optical zoom moving distance q is: the moving distance of the first lens group (G1) during the process of the optical lens switching from the short focal length state to the long focal length state when the optical lens is focusing on a distant scene; The first optical zoom movement distance q satisfies: q≤20mm.

3. The optical lens according to claim 2, characterized in that, 2.8mm≤q≤6mm, or 12mm≤q≤20mm.

4. The optical lens according to claim 2 or 3, characterized in that, The first moving distance is equal to the first optical zoom moving distance q.

5. The optical lens according to any one of claims 1 to 4, characterized in that, The effective focal length f of the first lens group (G1) g1 The effective focal length f of the second lens group (G2) g2 The effective focal length F and the optical power distribution ratio α of the optical lens satisfy: |(m1-m2)f g2 ≤20mm; Wherein, m1 represents the optical lens in the telephoto state. The value of m2; m2 is the optical lens when it is in the short focal length state. The value of α; α = F / f g1 .

6. The optical lens according to claim 5, characterized in that, 2.8mm≤|(m1-m2)f g2 |≤6mm; or, 12mm≤|(m1-m2)f g2 ≤20mm.

7. The optical lens according to any one of claims 1 to 6, characterized in that, The second moving distance includes the second optical zoom moving distance Δ1; The second optical zoom moving distance Δ1 is: the moving distance of the second lens group (G2) during the process of switching the optical lens from the short focal length state to the long focal length state when the optical lens is focusing on a distant scene; The second optical zoom movement distance Δ1 satisfies: Δ1≤27.6mm.

8. The optical lens according to claim 7, characterized in that, 3.9mm≤Δ1≤8.5mm; or, 17.4mm≤Δ1≤27.6mm.

9. The optical lens according to any one of claims 1 to 8, characterized in that, The effective focal length f of the first lens group (G1) g1 The effective focal length f of the second lens group (G2) g2 The effective focal length F and the optical power distribution ratio α of the optical lens satisfy: |-nf g2 |≤27.6mm; Where n is the difference between the value of α when the optical lens is in the telephoto state and the value of α when it is in the short focal length state; α = F / f g1 .

10. The optical lens according to claim 9, characterized in that, 3.9mm≤|-nf g2 |≤8.5mm; or, 17.4mm≤|-nf g2 |≤27.6mm.

11. The optical lens according to any one of claims 1 to 10, characterized in that, When the optical lens is in the telephoto or short focal length state, the distance between the first lens group (G1) and the image plane of the optical lens along the optical axis (10) is relatively fixed, and the second lens group (G2) can move relative to the first lens group (G1) along the optical axis (10) so that the optical lens can switch between focusing on distant objects and focusing on close objects.

12. The optical lens according to claim 11, characterized in that, The second moving distance includes the focusing moving distance Δ2, which is the moving distance of the second lens group (G2) when the optical lens switches between focusing on the near scene and focusing on the far scene; When the optical lens is in the telephoto state, the focusing movement distance Δ2 satisfies: Δ2≤6.9mm; and / or, when the optical lens is in the short focal length state, the focusing movement distance Δ2 satisfies: Δ2≤3.9mm.

13. The optical lens according to claim 12, characterized in that, When the optical lens is in the telephoto state, the focusing movement distance Δ2 satisfies: 0.3mm≤Δ2≤2.6mm; or 2.5mm≤Δ2≤6.9mm.

14. The optical lens according to claim 12 or 13, characterized in that, When the optical lens is in the short focal length state, the focusing movement distance Δ2 satisfies: 0.65mm≤Δ2≤1.1mm; or 1.0mm≤Δ2≤3.9mm.

15. The optical lens according to any one of claims 11 to 14, characterized in that, When the optical lens is in the short focal length state and is focusing on a distant scene, the back focal length BFL of the optical lens satisfies: BFL≥0.8mm; and / or, when the optical lens is in the short focal length state and is focusing on a close-up scene, the back focal length BFL of the optical lens satisfies: BFL≥0.15mm.

16. The optical lens according to any one of claims 11 to 15, characterized in that, When the optical lens is in the telephoto state and focusing on a distant scene, the back focal length BFL of the optical lens satisfies: BFL≥8.3mm; and / or, when the optical lens is in the telephoto state and focusing on a close-up scene, the back focal length BFL of the optical lens satisfies: BFL≥7mm.

17. The optical lens according to any one of claims 11 to 16, characterized in that, When the optical lens is in the short focal length state and focusing on a close-up scene, the gap width δ between the first lens group (G1) and the second lens group (G2) satisfies: δ≥5.1mm; And / or, when the optical lens is in the short focal length state and focusing on a distant scene, the gap width δ between the first lens group (G1) and the second lens group (G2) satisfies: δ≥1.3mm.

18. The optical lens according to any one of claims 11 to 17, characterized in that, When the optical lens is in the telephoto state and focusing on a close-up, the gap width δ between the first lens group (G1) and the second lens group (G2) satisfies: δ≥1mm; And / or, when the optical lens is in the telephoto state and focusing on a distant scene, the gap width δ between the first lens group (G1) and the second lens group (G2) satisfies: δ≥0.26mm.

19. The optical lens according to any one of claims 11 to 18, characterized in that, Minimum value of focusing stroke compression ratio ξ min The optical power distribution ratio α, the effective focal length F of the optical lens, and the effective focal length f of the first lens group (G1) g1 satisfy: 0.8≤ξ min =|1-a 2 |≤6.3; among others,α=F / f g1 。 20. The optical lens according to claim 19, characterized in that, When the optical lens is in the short focal length state, the minimum value of the focusing stroke compression ratio ξ min Satisfy: 0.8≤ξ min ≤2.1; And / or, When the optical lens is in the telephoto state, the minimum value of the focusing stroke compression ratio ξ min Satisfy: 3.0≤ξ min ≤6.

3.

21. The optical lens according to any one of claims 11 to 20, characterized in that, The optical power distribution ratio α, the effective focal length F of the optical lens, and the effective focal length f of the first lens group (G1) g1 satisfy: 1.3≤α=F / f g1 ≤2.7。 22. The optical lens according to claim 21, characterized in that, When the optical lens is in the short focal length state, the optical power distribution ratio α satisfies: 1.36≤α≤1.75; And / or, when the optical lens is in the telephoto state, the optical power distribution ratio α satisfies: 1.97≤α≤2.

69.

23. The optical lens according to any one of claims 11 to 22, characterized in that, When the optical lens is in the short focal length state, the optical power distribution ratio α, the effective focal length F of the optical lens, and the effective focal length f of the first lens group (G1) are... g1 The effective focal length f of the second lens group (G2) g2 satisfy: in, α=F / f g01 .

24. The optical lens according to any one of claims 11 to 23, characterized in that, When the optical lens is in the short focal length state, the minimum focusing distance U of the optical lens 1min 'satisfy: IN 1min ′≥45mm。 25. The optical lens according to any one of claims 1 to 24, characterized in that, The optical lens satisfies at least one of the following relationships: 1.2≤Г max ≤2.0; 1.7≤Гˊ max ≤2.2; 1.7≤Fno≤4.1; 3.5 ≤ ImgH ≤ 8.3; Among them, Г max The maximum optical zoom ratio is the maximum ratio of the effective focal length of the optical lens when it is in the telephoto state to the maximum effective focal length when it is in the short focal state, provided that the optical lens is focused on a distant scene. Гˊ max The maximum system zoom ratio is the ratio of the maximum effective focal length to the minimum effective focal length of the optical lens. Fno is the aperture number of the optical lens; ImgH is the image height of the optical lens.

26. The optical lens according to any one of claims 1 to 25, characterized in that, 1.2≤j≤2.0; where j is the ratio of the value of α when the optical lens is in the telephoto state to the value of α when it is in the short focal length state, provided the optical lens is focused on a distant scene; α=F / f g1 F is the effective focal length of the optical lens, f g1 The effective focal length of the first lens group (G1) is given.

27. The optical lens according to any one of claims 1 to 26, characterized in that, The first lens group (G1) has three lenses: a first lens (L11) with positive optical power, a second lens (L12) with negative optical power, and a third lens (L13) with positive optical power. The second lens (L12) is disposed between the first lens (L11) and the third lens (L13). The second lens group (G2) has three lenses: a fourth lens (L21) with negative optical power, a fifth lens (L22) with positive optical power, and a sixth lens (L23) with negative optical power. The fifth lens (L22) is disposed between the fourth lens (L21) and the sixth lens (L23). Alternatively, the first lens group (G1) may have three lenses, namely a first lens (L11) with positive optical power, a second lens (L12) with positive optical power, and a third lens (L13) with positive optical power; the second lens group (G2) may have two lenses, namely a fourth lens (L21) with negative optical power and a fifth lens (L22) with negative optical power.

28. The optical lens according to any one of claims 1 to 27, characterized in that, The optical lens further includes a first optical path deflection element (3), which is disposed on the object side of the first lens group (G1); or, the first optical path deflection element (3) is disposed between the first lens group (G1) and the second lens group (G2).

29. A camera module, characterized in that, It includes a photosensitive element (200) and an optical lens (100) according to any one of claims 1 to 28, wherein the photosensitive element (200) is disposed on the image side of the optical lens (100).

30. An electronic device, characterized in that, It includes a housing (500) and a camera module (400) as described in claim 29, the camera module (400) being mounted on the housing (500).

Images