A lens assembly, a camera module, and an electronic device.

Abstract

This application discloses a lens assembly, a camera module, and an electronic device. In the lens assembly, a first optical path adjustment unit is configured to control the propagation of a first light ray from the object side along a first direction; a second optical path adjustment unit is located on the light-emitting side of the first optical path adjustment unit and is configured to control the propagation of the first light ray along a second direction to the image side, the second direction being different from the first direction; a focusing unit is located along the optical path of the first light ray and is configured to move along the optical axis of the lens assembly for optical focusing; an image stabilization unit is located along the optical path of the first light ray and is configured to move in a direction perpendicular to the optical axis for optical image stabilization. By utilizing the transmission and / or reflection effects of the first and second optical path adjustment units, the propagation path of light can be changed. This not only enables ultra-long focal lengths but also reduces the size of the lens assembly, minimizing its footprint within the electronic device's internal space and improving image quality.

Description

Technical Field

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

[0002] As the imaging capabilities of electronic devices become increasingly demanding, integrating telephoto lenses has become a major development trend in electronic devices such as mobile phones and tablets to enhance their competitiveness. Telephoto lenses are characterized by their long focal length and narrow angle of view, making them suitable for photographing distant objects and subjects that are difficult to approach.

[0003] However, traditional telephoto lenses usually have drawbacks such as excessive length and size, which take up too much internal space in electronic devices and cannot meet the miniaturization needs of electronic devices. Summary of the Invention

[0004] This application provides a lens assembly, a camera module, and an electronic device to solve the problem that existing telephoto lenses are too large to meet the miniaturization needs of electronic devices.

[0005] In a first aspect, this application provides a lens assembly, including: a first optical path adjustment unit, a second optical path adjustment unit, a focusing unit, and an image stabilization unit. The first optical path adjustment unit is configured to control the propagation of a first ray from the object side along a first direction; the second optical path adjustment unit is located on the light-emitting side of the first optical path adjustment unit; the second optical path adjustment unit is configured to control the propagation of the first ray along a second direction to the image side, the second direction being different from the first direction; the focusing unit is located along the optical path of the first ray, and the focusing unit is configured to move along the optical axis of the lens assembly to perform optical focusing; the image stabilization unit is located along the optical path of the first ray, and the image stabilization unit is configured to move along a direction perpendicular to the optical axis to perform optical image stabilization.

[0006] The lens assembly provided in this application embodiment can change the propagation path of light by utilizing the transmission and / or reflection effects of the first and second optical path adjustment units. This not only achieves an ultra-long focal length but also reduces the size of the lens assembly, making its structure compact and minimizing its footprint within the electronic device's internal space, thus meeting the trend towards thinner and lighter electronic devices. Simultaneously, the lens assembly has focusing and image stabilization functions, using the focusing and image stabilization units to process the first light rays to improve image quality.

[0007] In some implementations, the focal length FGA of the focusing unit and the effective focal length F of the lens assembly satisfy: 0.7 < |FGA / F| < 1.2. In this way, by constraining the effective focal length of the lens assembly, the lens assembly has an ultra-long focal length. Moreover, based on the total effective focal length of the lens assembly, it is beneficial to reasonably set the focal length of the focusing unit of the lens assembly, reduce the variation of various aberrations with spherical aberration being the primary one when the lens assembly focuses from an infinitely distant object to a nearby object, and at the same time ensure a better balance between the size of the lens assembly and the imaging quality.

[0008] In some implementations, the focal length FGO of the anti-shake unit and the effective focal length F of the lens assembly satisfy: 1.0 < |FGO / F| < 1.6. In this way, based on the total effective focal length of the lens assembly, it is beneficial to reasonably set the focal length of the anti-shake unit of the lens assembly, compensate for the image offset generated after the lens tilts at a certain angle due to hand shake or body vibration, and at the same time ensure a better balance between the size of the lens assembly and the imaging quality.

[0009] In some implementations, the aperture value F# of the lens assembly satisfies: F# < 4.5. In this way, it is beneficial to increase the entrance pupil diameter of the lens assembly and improve the imaging quality of the lens assembly in low-light environments.

[0010] In some implementations, the total thickness TGA of the focusing unit and the entrance pupil diameter EPD of the lens assembly satisfy: 0.65 < TGA / EPD < 1.0. In this way, by controlling the ratio of the total thickness TGA of the focusing unit of the telephoto lens assembly to the entrance pupil diameter EPD, the length of the telephoto lens assembly can be controlled in the normal direction of the imaging plane, that is, the horizontal direction during normal use, preventing the structural size of the telephoto lens assembly from being too large; at the same time, ensuring a relatively small total thickness of the focusing unit can reduce the requirements for the motor stroke and accuracy. In this way, it can better meet the requirements for small size and compact structure of portable electronic devices.

[0011] In some implementations, the total thickness TGO of the anti-shake unit and the entrance pupil diameter EPD of the lens assembly satisfy: 0.6 < TGO / EPD < 1.0. In this way, by controlling the ratio of the total thickness TGO of the anti-shake unit of the telephoto lens assembly to the entrance pupil diameter EPD, the length of the telephoto lens assembly can be controlled in the normal direction of the imaging plane, that is, the horizontal direction during normal use, preventing the structural size of the telephoto lens assembly from being too large; at the same time, ensuring a relatively small total thickness of the anti-shake unit can reduce the requirements for the motor stroke and accuracy. In this way, it can better meet the requirements for small size and compact structure of portable electronic devices.

[0012] In some implementations, the focusing movement stroke DGA of the focusing unit satisfies: 2.5 < DGA < 3.5. In this way, it is beneficial to reasonably allocate the movement stroke of the driving motor and at the same time ensure that the motor has good focusing accuracy.

[0013] In some implementations, the anti-shake angle OA and anti-shake stroke DGO of the anti-shake unit satisfy: 1.0 < |DGO / OA| < 1.4. In this way, it is beneficial to reduce the moving stroke of the driving motor while ensuring a sufficiently large anti-shake angle, thereby reducing the volume of the anti-shake unit and ensuring that the telephoto lens assembly has good optical performance while taking into account miniaturization in terms of structure.

[0014] In some implementations, along the first direction, the lens assembly has a length L; the length L and the effective focal length F of the lens assembly satisfy: 0.6 < L / F < 0.9. In this way, by controlling the ratio of the length of the optical total length of the telephoto lens assembly in the x-axis direction to the effective focal length F, the length of the telephoto lens assembly can be controlled in the normal direction of the imaging plane, that is, the horizontal direction during normal use, preventing the structural size of the telephoto lens assembly from being too large, so as to better meet the requirements of small size and compact structure for portable electronic devices.

[0015] In some implementations, along the second direction, the lens assembly has a width W; the width W and the entrance pupil diameter EPD of the lens assembly satisfy: 2 < W / EPD < 2.8. In this way, by controlling the ratio of the width of the telephoto lens assembly in the vertical y-axis direction to the entrance pupil diameter, the structural size of the telephoto lens assembly can be effectively ensured not to be too large, so that the portable electronic device installed with it can meet the requirements of small size and compact structure.

[0016] In some implementations, the zoom unit includes multiple lenses, and the multiple lenses of the zoom unit are sequentially distributed along the optical path of the first light ray; the anti-shake unit includes multiple lenses, and the multiple lenses of the anti-shake unit are sequentially distributed along the optical path of the first light ray. In this way, both the focusing unit and the anti-shake unit are implemented by independent lens groups. When the lens assembly needs to focus, only a set of lenses is used to achieve focusing, instead of using the entire lens to achieve focusing, thereby reducing the relatively long focusing stroke, improving the focusing ability, and achieving light weight. Moreover, there is no need to additionally configure a long-stroke driving motor to drive the movement of the lens to reduce the volume of the lens assembly. When the lens assembly needs to anti-shake, only a set of lenses is used to achieve anti-shake, instead of driving the rotation of the prism in front of the lens to achieve optical anti-shake, with low requirements for the driving motor and fully achieving light weight.

[0017] In some implementations, the focusing unit is located on the optical path of the first ray along a first direction, and the image stabilization unit is located on the optical path of the first ray along a second direction; or, the focusing unit is located on the optical path of the first ray along the second direction, and the image stabilization unit is located on the optical path of the first ray along the first direction. In this way, the focusing unit can suppress variations in aberrations, primarily spherical aberration, when focusing from an object at infinity to a closer object, and the image stabilization unit can compensate for image shifts caused by lens assembly tilt due to hand or body shake, thereby improving image quality.

[0018] In some implementations, the first optical path adjustment unit includes a first reflective surface; the first reflective surface is configured to receive and reflect a first light ray from the object side to control the propagation of the first light ray along a first direction, which is different from the incident direction of the first light ray. In this way, the first reflective surface can be used to adjust the optical path of the first light ray, changing its propagation direction and thereby reducing the size of the lens assembly along the incident direction.

[0019] In some implementations, the second optical path adjustment unit includes a second reflective surface and a third reflective surface. The second reflective surface faces the first optical path adjustment unit, and the third reflective surface faces the image side. The second reflective surface is configured to receive a first light ray propagating along a first direction and perform a first reflection on the first light ray to control the propagation of the first light ray to the third reflective surface. The third reflective surface is configured to perform a second reflection on the first light ray after the first reflection to control the propagation of the first light ray along a second direction to the image side. In this way, the first light ray can be reflected twice by the second and third reflective surfaces to perform optical path adjustment again, changing the optical path of the first light ray from the first direction to the second direction, thereby reducing the size of the lens assembly along the first direction.

[0020] Secondly, this application provides a camera module, including: a light filter, an image sensor, and a lens assembly as provided in the first aspect; the light filter is located on the light-emitting side of the lens assembly and is configured to receive light emitted by the lens assembly; the image sensor is located on the light-emitting side of the light filter and is configured to perform photoelectric conversion on the light processed by the light filter, and then use it for imaging.

[0021] The camera module provided in this application embodiment, by reasonably setting the optical parameters of each component in the lens assembly, can not only reduce the requirements for the drive stroke and accuracy of the focusing motor and the image stabilization motor, ensuring the lightweight of the focusing unit and the image stabilization unit; it can also achieve telephoto characteristics and improve image quality; at the same time, the small size of the lens assembly can reduce the size of the camera module, thereby reducing the internal space occupied by the electronic device and realizing the development of thinner and lighter electronic devices.

[0022] Thirdly, this application provides an electronic device, including: a display screen, a mid-frame, a rear cover, and a camera module as provided in the second aspect; the display screen and the rear cover are located on opposite sides of the mid-frame; the rear cover includes a light-transmitting hole, the camera module is fixed on the mid-frame, and the lens assembly is opposite to the light-transmitting hole.

[0023] The electronic device provided in this application includes a camera module. The camera module is small in size, which reduces its footprint within the electronic device, contributing to its slimmer and lighter design. Furthermore, the camera module offers high image quality, improving the imaging performance of the electronic device. Attached Figure Description

[0024] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0026] Figure 2 This is a rear view of the electronic device provided in the embodiments of this application;

[0027] Figure 3 This is a perspective view of the lens assembly provided in the embodiments of this application;

[0028] Figure 4 This is a schematic diagram of the first optical axis of the lens assembly provided in the embodiments of this application;

[0029] Figure 5 This is a schematic diagram of the second optical axis of the lens assembly provided in the embodiments of this application;

[0030] Figure 6 This is a schematic diagram of the third optical axis of the lens assembly provided in the embodiments of this application;

[0031] Figure 7 This is a schematic diagram of the optical path of the lens assembly provided in an embodiment of this application;

[0032] Figure 8 This is a schematic diagram of the lens assembly provided in Embodiment 1 of this application;

[0033] Figure 9 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 1 of this application;

[0034] Figure 10 This is a schematic diagram of the lens assembly provided in Embodiment 2 of this application;

[0035] Figure 11These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 2 of this application;

[0036] Figure 12 This is a schematic diagram of the lens assembly provided in Embodiment 3 of this application;

[0037] Figure 13 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 3 of this application;

[0038] Figure 14 This is a schematic diagram of the lens assembly provided in Embodiment 4 of this application;

[0039] Figure 15 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 4 of this application;

[0040] Figure 16 This is a schematic diagram of the lens assembly provided in Embodiment 5 of this application;

[0041] Figure 17 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 5 of this application;

[0042] Figure 18 This is a schematic diagram of the lens assembly provided in Embodiment Six of this application;

[0043] Figure 19 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment Six of this application;

[0044] Figure 20 This is a schematic diagram of the lens assembly provided in Embodiment 7 of this application;

[0045] Figure 21 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 7 of this application;

[0046] Figure 22 This is a schematic diagram of the lens assembly provided in Embodiment 8 of this application;

[0047] Figure 23 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 8 of this application;

[0048] Figure 24 This is a schematic diagram of the structure of the camera module located inside an electronic device according to an embodiment of this application.

[0049] Illustration:

[0050] 10-Display screen, 20-Mid-frame, 30-Rear cover, 31-Light transmission hole, 40-Camera assembly, 50-Camera module, 100-First optical path adjustment unit, 101-First reflective surface, 102-First light-incident surface, 103-First light-exiting surface, 200-Second optical path adjustment unit, 201-Second reflective surface, 202-Third reflective surface, 203-Second light-incident surface, 204-Second light-exiting surface, 300-Focusing unit, 301-First lens, 302-Second lens, 303-Third lens, 304-Fourth lens, 400-Shake stabilization unit, 401-Fifth lens, 402-Sixth lens, 403-Seventh lens, 404-Eighth lens, 500-Filter. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the protection scope of this application.

[0052] In the description of this application, the terms "first," "second," etc., 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," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0053] Furthermore, in this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the indicated placement of the components in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the placement of the components in the accompanying drawings.

[0054] The following explanations of the technical terms mentioned in the embodiments of this application are provided to facilitate understanding by those skilled in the art.

[0055] The field of view (FOV) refers to the maximum range of the field of view that a lens can capture. The size of the FOV determines the field of view of an optical instrument.

[0056] The optical axis is the axis that passes through the center of each lens in a lens.

[0057] The focal point is the point at which all light rays converge when they enter a convex lens, parallel to the optical axis. Ideally, a convex lens should be such that all light rays converge at a single point behind the lens.

[0058] Focal length, also known as focal length, is a measure of how well light converges or diverges in an optical lens. It refers to the perpendicular distance from the optical center of a lens or lens group to the focal plane when a distant object is projected into a sharp image. From a practical perspective, it can be understood as the distance from the lens center to the focal plane when the object is at infinity. For prime lenses, the position of their optical center remains constant; for telephoto lenses, changes in the lens's optical center result in changes in the focal length.

[0059] Effective focal length (EFL) refers to the distance from the center of the lens to the focal point.

[0060] The object side is the side where the subject is located, with the lens assembly as the boundary. The side of the lens facing the object side is the object side of the lens.

[0061] The image side is the side on which the image of the subject is located, and the side of the lens facing the image side is the image side surface.

[0062] An aperture diaphragm is a device used to control the amount of light passing through the lens and entering the sensor inside the camera body; it is usually located inside the lens.

[0063] Aperture value, also known as F-number (FNO), is a relative value derived from the lens's focal length divided by the lens's entrance pupil diameter (the reciprocal of the relative aperture). A smaller aperture value allows more light to enter the lens in the same unit of time. A larger aperture value results in a shallower depth of field, blurring the background and creating an effect similar to a telephoto lens.

[0064] The entrance pupil diameter (EPD), also known as the entrance pupil aperture, is the diameter of the pupil as seen from object space.

[0065] Total track length (TTL) refers to the total length from the surface of the lens closest to the object to the imaging plane. TTL is a major factor in determining the height of the camera.

[0066] The imaging plane is located on the image side of all lenses in an optical lens, and is the surface on which light rays pass through each lens in the optical lens in sequence to form an image.

[0067] 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.

[0068] Refractive index is the ratio of the speed of light in air to the speed of light in an optical material. The higher the refractive index of an optical material, the stronger its ability to refract incident light, and the thinner the lens.

[0069] Aberrations are the properties of an optical lens as an ideal optical system at the optical axis. A near-axis ray emitted from a point on an object intersects the image plane at a single point (i.e., the optical axis image point). However, in reality, light rays passing through different apertures of the lens rarely intersect perfectly at a single point. Instead, they deviate from the position of the near-axis image point. These differences are collectively referred to as aberrations.

[0070] Distortion, also known as image distortion, refers to the degree of distortion in the image formed by an optical lens relative to the object itself. Distortion occurs due to the spherical aberration of the aperture. The height of the intersection point between the principal ray and the Gaussian image plane after passing through the lens in different fields of view is not equal to the ideal image height; this difference is the distortion. Therefore, distortion only changes the imaging position of the off-axis object point on the ideal plane, causing a distortion in the image shape, but it does not affect the image's sharpness.

[0071] Astigmatism occurs because the object point is not on the optical axis of the lens, causing the emitted beam of light to be tilted at an angle to the optical axis. After refraction by the lens, the convergence points of the meridional and sagittal beams are not at the same point. In other words, the beam cannot be focused at a single point, resulting in an unclear image and thus astigmatism. The meridional and sagittal beams are the names of the beams within two perpendicular planes of a rotationally symmetric optical lens.

[0072] The meridional plane is the plane formed by the principal ray (principal beam) of an object point outside the optical axis and the optical axis.

[0073] The sagittal surface is the plane that passes through the principal ray (principal beam) of an object point outside the optical axis and is perpendicular to the meridional plane.

[0074] Field curvature refers to the difference in optical axis between the position of the sharpest image point after rays from the off-center field of view pass through an optical lens assembly and the position of the sharpest image point in the center field of view. When a lens has field curvature, the intersection of the entire beam does not coincide with the ideal image point. Although a sharp image point can be obtained at each specific point, the entire image plane is a curved surface.

[0075] The electronic devices described in this application include, but are not limited to, mobile phones, laptops, tablets, personal digital assistants, or wearable devices. The following description uses a mobile phone as an example.

[0076] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application; Figure 2 This is a rear view of the electronic device provided in the embodiments of this application.

[0077] like Figure 1 and Figure 2As shown, the electronic device may include a display screen 10, a mid-frame 20, and a rear shell 30. The display screen 10 and the rear shell 30 are located on opposite sides of the mid-frame 20. The display screen 10, the mid-frame 20, and the rear shell 30 are sequentially fastened together to form a complete device cavity. The complete device cavity includes components such as a communication module, a circuit board, a battery, a speaker assembly, and a camera assembly 40, which are not listed here.

[0078] The camera assembly 40 can provide shooting functions for electronic devices. The camera assembly 40 can be used as a front camera or a rear camera.

[0079] This application embodiment is described using a rear camera as an example. A light-transmitting hole 31 is provided on the rear cover 30. The camera assembly 40 is fixed between the rear cover 30 and the middle frame 20, and the lens of the camera assembly 40 is exposed through the light-transmitting hole 31 to capture the surrounding scene.

[0080] To facilitate the explanation of the positions of various components in the electronic device, this application embodiment exemplarily establishes a three-dimensional coordinate system based on the electronic device, wherein the x-axis direction is the width direction of the electronic device, the y-axis direction is the length direction of the electronic device, and the z-axis direction is the thickness direction of the electronic device.

[0081] The camera assembly 40 includes a lens, a filter, an image sensor, and an image processor, the structures of which are not shown in the figure. The image sensor is located on the image side of the lens, the filter is located between the lens and the image sensor, and the image processor is located inside the overall cavity and coupled to the circuit board.

[0082] The light reflected from the subject can generate an optical image through the lens and project it onto the image sensor. The image sensor converts the optical image into an electrical signal, which can be transmitted to the image processor for processing, and finally the image of the subject is displayed on the display screen 10.

[0083] To enhance the imaging capabilities of electronic devices, the camera assembly 40 typically integrates a telephoto lens to improve user experience. Telephoto lenses have a long focal length and a narrow angle of view, capturing a relatively small spatial range of objects, and can produce a larger image than a standard lens at the same shooting distance. Therefore, telephoto lenses are suitable for photographing distant objects and objects that are difficult to approach.

[0084] Miniaturization of electronic devices is a current technological trend, while traditional telephoto lenses typically suffer from drawbacks such as excessive length, poor image quality, or large size. Their large size and space requirements make them unsuitable for current technological advancements. Furthermore, the optical characteristics of telephoto lenses are limited by the thickness of electronic devices, restricting imaging effects such as background blur and object magnification.

[0085] Furthermore, when shooting macro with traditional telephoto lenses, it is usually necessary to move the entire lens to focus. Moving the entire telephoto lens results in a long travel distance and insufficient weight reduction, requiring an additional long-travel drive motor to drive the lens movement. However, this further increases the space occupied by the telephoto lens and weakens its focusing ability; at the same time, it is difficult to suppress variations in aberrations, primarily spherical aberration, when focusing from an object at infinity to a closer object, leading to unsatisfactory shooting results.

[0086] Existing telephoto lenses typically achieve optical image stabilization by rotating a prism in front of the entire lens. However, this stabilization unit is not lightweight enough and places high demands on the motor.

[0087] It is evident that how to achieve miniaturization, compact structure, ultra-long focal length, and high image quality in telephoto lenses, while ensuring the lightweight design of focusing and image stabilization components, has become an urgent problem to be solved.

[0088] To address the aforementioned technical problems, this application provides a lens assembly with a compact structure that reduces the internal space occupied by electronic devices, achieves ultra-long focal length and high image quality, and fully ensures lightweight focusing and image stabilization.

[0089] Figure 3 This is a perspective view of the lens assembly provided in the embodiments of this application.

[0090] like Figure 3 As shown, in some embodiments, the lens assembly may include: a first optical path adjustment unit 100, a second optical path adjustment unit 200, a focusing unit 300, and an image stabilization unit 400.

[0091] The first optical path adjustment unit 100 and the second optical path adjustment unit 200 are both configured to change the propagation optical path of light; the focusing unit 300 is configured to move along the optical axis of the lens assembly to perform optical focusing; and the image stabilization unit 400 is configured to move along a direction perpendicular to the optical axis to perform optical image stabilization.

[0092] Figure 4 This is a schematic diagram of the first optical axis of the lens assembly provided in an embodiment of this application. Figure 4 for Figure 3 Side view.

[0093] like Figure 4 As shown, in some embodiments, the first optical path adjustment unit 100 is located near the object side, and the first optical path adjustment unit 100 is configured to control the propagation of the first light ray from the object side along the first direction D1.

[0094] The first optical path adjustment unit 100 can deflect the light transmission path (hereinafter referred to as the optical path) within the lens assembly through reflection, so that the first light ray no longer continues to propagate along the incident direction D0, but propagates along other directions (such as the first direction D1).

[0095] For example, the first optical path adjustment unit 100 can be a single prism, a mirror assembly, a combination of a lens group and a mirror or prism, a total internal reflection fiber, or other optical structures, as long as they can achieve the same optical path adjustment function. This application does not impose specific limitations on the embodiments. If the first optical path adjustment unit 100 adopts a prism, the object side or image side of the first optical path adjustment unit 100 can be a plane, a sphere, an aspherical surface, or a freeform surface, etc.

[0096] In some embodiments, the first optical path adjustment unit 100 may include a first reflective surface 101, a first light-incident surface 102, and a first light-exiting surface 103, wherein the first reflective surface 101 is connected between the first light-incident surface 102 and the first light-exiting surface 103. The first light-incident surface 102 faces the object side and is perpendicular to the z-axis; the first light-exiting surface 103 faces the image side and is perpendicular to the x-axis.

[0097] The first reflecting surface 101 is inclined relative to the optical axis and faces the object side and the first direction D1, so as to reflect the incident light from the object side toward the first direction D1. For example, the first reflecting surface 101 can be inclined at 45°.

[0098] The first incident surface 102 receives a first light ray from the object side, and the first light ray enters the first optical path adjustment unit 100 via the first incident surface 102. The first reflecting surface 101 is configured to receive the first light ray from the object side and reflect the first light ray to control the propagation of the first light ray along a first direction D1, which is different from the incident direction D0 of the first light ray. The first reflecting surface 101 reflects the first light ray entering via the first incident surface 102 so that the first light ray exits from the first exit surface 103 along the first direction D1.

[0099] In this way, the first reflective surface 101 can be used to adjust the optical path of the first light ray, change the propagation direction of the first light ray, and thereby reduce the size of the lens assembly along the incident direction D0.

[0100] Figure 5 This is a schematic diagram of the second optical axis of the lens assembly provided in the embodiments of this application.

[0101] In some embodiments, such as Figure 5As shown, the second optical path adjustment unit 200 is located on the light-emitting side of the first optical path adjustment unit 100, that is, on one side of the image side of the first optical path adjustment unit 100. The second optical path adjustment unit 200 is configured to control the first light ray to propagate to the image side along the second direction D2. The second direction D2 is different from the first direction D1; the second direction D2 can be perpendicular to the first direction D1, or it can be at an angle, etc.

[0102] The second optical path adjustment unit 200 can achieve the purpose of optical path reversal by transmitting and / or reflecting the optical path, so that the first light ray no longer continues to propagate in the first direction D1, but propagates in other directions (such as the second direction D2).

[0103] For example, the second optical path adjustment unit 200 can be a single or multiple prisms, a mirror assembly, a combination of a lens group and a mirror or prism, a total internal reflection fiber, or other optical structures, as long as they can achieve the same optical path adjustment function. This application does not impose specific limitations on these structures. If the second optical path adjustment unit 200 uses a prism, the object-side or image-side surface of the second optical path adjustment unit 200 can be a plane, a spherical surface, an aspherical surface, or a freeform surface, etc.

[0104] In some embodiments, the second optical path adjustment unit 200 may include a second reflecting surface 201, a third reflecting surface 202, a second light-incident surface 203, and a second light-exiting surface 204. The second light-incident surface 203 is connected between the third reflecting surface 202 and the second light-exiting surface 204; the second light-incident surface 203 faces the object side and is perpendicular to the x-axis. The second light-exiting surface 204 is connected between the second light-incident surface 203 and the second reflecting surface 201; the second light-exiting surface 204 faces the image side and is perpendicular to the y-axis. Both the second reflecting surface 201 and the third reflecting surface 202 are inclined relative to the optical axis to achieve reflection.

[0105] The second reflecting surface 201 is configured to receive a first light ray propagating along the first direction D1 and to reflect the first light ray for the first time, so as to control the propagation of the first light ray to the third reflecting surface 202. The third reflecting surface 202 is configured to reflect the first light ray after the first reflection for the second time, so as to control the propagation of the first light ray along the second direction D2 to the image side.

[0106] The first light ray emitted from the first light path adjustment unit 100 enters the second light path adjustment unit 200 via the second light incident surface 203, and is reflected sequentially on the second reflective surface 201 and the third reflective surface 202, and is emitted from the second light exiting surface 204 along the second direction D2 to the image side.

[0107] In this way, the first light can be reflected twice by the second reflective surface 201 and the third reflective surface 202 to adjust the optical path again, changing the optical path of the first light to the first direction D1 and the second direction D2, thereby reducing the size of the lens assembly along the first direction D1.

[0108] In one implementation, the second optical path adjustment unit 200 can be a polygonal structure; for example, the second optical path adjustment unit 200 is a pentagonal structure. The second reflecting surface 201 is adjacent to the image side and faces the first optical path adjustment unit 100; the third reflecting surface 202 is located between the first optical path adjustment unit 100 and the second reflecting surface 201, and faces the image side. The second reflecting surface 201 and the third reflecting surface 202 have an included angle. In this embodiment, the tilt angle of the second reflecting surface 201 and the third reflecting surface 202 is not limited, so that the first ray transmitted along the first direction D1 can be redirected to the second direction D2 for continued transmission.

[0109] Since both the first optical path adjustment unit 100 and the second optical path adjustment unit 200 have optical path adjustment functions, the optical axis of the lens assembly is not along the same direction.

[0110] Combination Figure 4 and Figure 5 As shown, the optical axis of the lens assembly may include a first optical axis segment z1, a second optical axis segment z2, and a third optical axis segment z3. For ease of description, the portion of the optical axis segment that bends between the second reflecting surface 201 and the third reflecting surface 202 is ignored. The first optical axis segment z1 is formed between the object side and the first optical path adjustment unit 100, and the first optical axis segment z1 is parallel to the z-axis direction. The second optical axis segment z2 is formed between the first optical path adjustment unit 100 and the second optical path adjustment unit 200, and the second optical axis segment z2 is parallel to the x-axis direction. The third optical axis segment z3 is formed between the second optical path adjustment unit 200 and the image side, and the third optical axis segment z3 is parallel to the y-axis direction.

[0111] Thus, the first optical axis segment z1 is perpendicular to the second optical axis segment z2, and the second optical axis segment z2 is perpendicular to the third optical axis segment z3. Utilizing the optical path redirection function of the first optical path adjustment unit 100 and the second optical path adjustment unit 200, the optical axis can be sequentially rotated by 90°.

[0112] Figure 6 This is a schematic diagram of the third optical axis of the lens assembly provided in the embodiments of this application.

[0113] like Figure 6As shown, in another implementation, the second optical path adjustment unit 200 can be an isosceles trapezoidal structure, with the second incident surface 203 and the second exiting surface 204 coplanar. The second reflecting surface 201 is adjacent to the first optical path adjustment unit 100 and is inclined towards the first optical path adjustment unit 100 along the y-axis direction; the third reflecting surface 202 is located on the side opposite to the second reflecting surface 201 along the y-axis direction and is inclined towards the image side along the y-axis direction. The second reflecting surface 201 and the third reflecting surface 202 are mirror images of each other along a direction parallel to the second optical axis segment z2. For example, both the second reflecting surface 201 and the third reflecting surface 202 can be tilted at 45°.

[0114] In this way, the optical axis can be rotated 90° at the second reflecting surface 201 and transmitted to the third reflecting surface 202, where it is rotated another 90° to the image side. The portion of the optical axis that bends between the second and third reflecting surfaces 201 is defined as the fourth optical axis segment z4. The second optical axis segment z2 is connected to and perpendicular to the fourth optical axis segment z4, and the fourth optical axis segment z4 is connected to and perpendicular to the third optical axis segment z3.

[0115] In this structure, the optical axis of the lens assembly may include a continuous first optical axis segment z1, a second optical axis segment z2, a fourth optical axis segment z4, and a third optical axis segment z3. The fourth optical axis segment z4 is parallel to the y-axis direction, and the third optical axis segment z3 is parallel to the x-axis direction. The propagation direction of the first ray along the second optical axis segment z2 is opposite to that along the third optical axis segment z3. Thus, by utilizing the optical path redirection function of the first optical path adjustment unit 100, the optical axis can be rotated by 90°, and by utilizing the optical path redirection function of the second optical path adjustment unit 200, the optical axis can be rotated by 180°.

[0116] In this embodiment, in the lens assembly of the second optical path adjustment unit 200 with an isosceles trapezoidal structure, the image side is adjacent to the first optical path adjustment unit 100, which reduces the size of the lens assembly in the y-axis direction.

[0117] See you again Figure 5 In some embodiments, the focusing unit 300 is located along the optical path of the first ray and is perpendicular to the optical axis of the lens assembly.

[0118] For example, the focusing unit 300 can be located on the optical path of the first light ray along the first direction D1. Thus, the focusing unit 300 is located between the first optical path adjustment unit 100 and the second optical path adjustment unit 200, and the focusing unit 300 is perpendicular to the second optical axis segment z2. During optical focusing, the focusing unit 300 moves along the direction of the second optical axis segment z2. Figure 5In the state shown, the focusing unit 300 can also be located on the optical path of the first ray along the second direction D2. In this way, the focusing unit 300 is located between the second optical path adjustment unit 200 and the image side, and the focusing unit 300 is perpendicular to the third optical axis segment z3 of the optical axis. When optical focusing is achieved, the focusing unit 300 moves along the direction of the third optical axis segment z3.

[0119] The focusing unit 300 includes multiple lenses, such as a first lens 301, a second lens 302, a third lens 303, and a fourth lens 304. The first lens 301, the second lens 302, the third lens 303, and the fourth lens 304 are distributed sequentially along the optical path of the first ray, and the first lens 301, the second lens 302, the third lens 303, and the fourth lens 304 are all perpendicular to the optical axis.

[0120] For example, the first lens 301, the second lens 302, the third lens 303, and the fourth lens 304 are sequentially distributed along the optical path of the first ray in the first direction D1, and are all perpendicular to the second optical axis segment z2 of the optical axis; or, as Figure 5 As shown, the first lens 301, the second lens 302, the third lens 303 and the fourth lens 304 are sequentially distributed along the optical path of the second direction D2 of the first ray, and are all perpendicular to the third optical axis segment z3 of the optical axis.

[0121] In this embodiment, the focusing unit 300 is formed by a lens group. When the lens assembly needs to focus, only one lens group is needed to achieve focusing, instead of using the entire lens assembly. This reduces the focusing distance, improves focusing capability, and achieves significant weight reduction. Furthermore, it eliminates the need for an additional long-stroke drive motor to move the lens assembly, further reducing its size. Simultaneously, using a separate lens group to form the focusing unit 300 can suppress variations in aberrations, primarily spherical aberration, when focusing from an infinity object to a closer object, thereby improving image quality.

[0122] In some embodiments, the image stabilization unit 400 is located along the optical path of the first light ray, and the image stabilization unit 400 is perpendicular to the optical axis of the lens assembly.

[0123] For example, such as Figure 5In the indicated state, the image stabilization unit 400 can be located on the optical path of the first ray along the first direction D1. Thus, the image stabilization unit 400 is positioned between the first optical path adjustment unit 100 and the second optical path adjustment unit 200, and the image stabilization unit 400 is perpendicular to the second optical axis segment z2. When optical image stabilization is achieved, the image stabilization unit 400 moves in a direction perpendicular to the second optical axis segment z2. Alternatively, the image stabilization unit 400 can be located on the optical path of the first ray along the second direction D2. Thus, the image stabilization unit 400 is positioned between the second optical path adjustment unit 200 and the image side, and the image stabilization unit 400 is perpendicular to the third optical axis segment z3. When optical image stabilization is achieved, the image stabilization unit 400 moves in a direction perpendicular to the third optical axis segment z3.

[0124] The image stabilization unit 400 includes multiple lenses, such as a fifth lens 401, a sixth lens 402, a seventh lens 403, and an eighth lens 404. The fifth lens 401, the sixth lens 402, the seventh lens 403, and the eighth lens 404 are arranged sequentially along the optical path of the first ray, and all of them are perpendicular to the optical axis.

[0125] For example, such as Figure 5 In the state shown, the fifth lens 401, the sixth lens 402, the seventh lens 403, and the eighth lens 404 are sequentially distributed along the optical path of the first ray in the first direction D1, and are all perpendicular to the second optical axis segment z2 of the optical axis; or, the fifth lens 401, the sixth lens 402, the seventh lens 403, and the eighth lens 404 are sequentially distributed along the optical path of the first ray in the second direction D2, and are all perpendicular to the third optical axis segment z3 of the optical axis.

[0126] In this embodiment, the image stabilization unit 400 is formed by a lens group. When the lens assembly needs image stabilization, only one lens group is needed to achieve image stabilization, eliminating the need to drive the rotation of the prism in front of the lens to achieve optical image stabilization. This reduces the requirements for the drive motor and allows for significant weight reduction. By using an independent lens group to form the image stabilization unit 400, image shift caused by hand or body shaking due to lens assembly tilt can be compensated when shooting objects with the lens assembly, thereby improving image quality.

[0127] In some embodiments, both the focusing unit 300 and the image stabilization unit 400 are implemented by independent lens groups. The lenses can be made of glass, resin (such as plastic), or other light-transmitting materials. Multiple lenses can be spaced apart or bonded together, and the lens group can be formed using cemented or non-cemented methods. For example, when the lens group is formed using cemented methods, each lens must be made of glass.

[0128] The object-side or image-side surface of a lens can be flat, concave, or convex. In one implementation, the surface shapes of the opposing object-side and image-side surfaces of two adjacent lenses can be adapted to achieve seamless fitting or spacing between the two lenses. For example, in the image stabilization unit 400, the image-side surface of the fifth lens 401 is concave, and the object-side surface of the sixth lens 402 is convex, thus achieving seamless fitting between the fifth lens 401 and the sixth lens 402. In this scenario, the image-side surface of the fifth lens 401 and the object-side surface of the sixth lens 402 share a common surface. The image-side surface of the sixth lens 402 is convex, and the object-side surface of the seventh lens 403 is concave; the sixth lens 402 and the seventh lens 403 can be spaced apart.

[0129] In another implementation, the object-side and image-side surfaces of two adjacent lenses can have the same shape. For example, the image-side surface of the lens adjacent to the object side and the object-side surface of the lens adjacent to the image side can both be planar, convex, or concave, thus creating a gap between the two adjacent lenses. For instance, in the focusing unit 300, the image-side surface of the first lens 301 is convex, and the object-side surface of the second lens 302 is convex, such that the first lens 301 and the second lens 302 only contact each other at the optical axis, with gaps between the remaining areas.

[0130] In some embodiments, the lenses of the focusing unit 300 and the image stabilization unit 400 can be either aspherical or spherical lenses, and this application embodiment does not limit this.

[0131] Aspherical lenses are lenses whose surfaces are not of a single curvature, but rather composed of multiple surfaces. This allows for excellent compensation for spherical aberration and distortion aberration, further facilitating the achievement of large aperture performance in lens components, while also reducing the overall length of the lens assembly.

[0132] For example, the aspherical surface shape of each lens can be defined using, but is not limited to, the following aspherical curve equation:

[0133]

[0134] Where z is the depth of the aspherical surface; c is the curvature of the vertex of the aspherical surface, c = 1 / R, R is the radius of curvature of the lens surface; and k is the cone coefficient. The radial distance (height of the mirror center); r n For the normalized radius, u = r / r n ;a m Q of order m con Coefficient (aspheric coefficient), Q m con Q of order m con Polynomial.

[0135] In this way, by using lenses with different surface shapes, the lens assembly can better converge and gather light, thereby increasing the aperture.

[0136] In some embodiments, the relative positions of the image stabilization unit 400 and the focusing unit 300 are not limited, as long as they are located on the optical path of the first light ray and perpendicular to the optical axis.

[0137] In the first implementation, the focusing unit 300 is located on the optical path of the first light ray along the first direction D1, and the image stabilization unit 400 is located on the optical path of the first light ray along the second direction D2. That is, the focusing unit 300 is located between the first optical path adjustment unit 100 and the second optical path adjustment unit 200, and the image stabilization unit 400 is located between the second optical path adjustment unit 200 and the image side.

[0138] In the second implementation, such as Figure 5 As shown, the image stabilization unit 400 is located on the optical path of the first light ray along the first direction D1, and the focusing unit 300 is located on the optical path of the first light ray along the second direction D2. That is, the image stabilization unit 400 is located between the first optical path adjustment unit 100 and the second optical path adjustment unit 200, and the focusing unit 300 is located between the second optical path adjustment unit 200 and the image side.

[0139] In the third implementation, both the focusing unit 300 and the image stabilization unit 400 are located on the optical path of the first light ray along the first direction D1. That is, both the focusing unit 300 and the image stabilization unit 400 are located between the first optical path adjustment unit 100 and the second optical path adjustment unit 200. The order of the focusing unit 300 and the image stabilization unit 400 is not limited, and they are spaced apart along the first direction D1.

[0140] In the fourth implementation, both the focusing unit 300 and the image stabilization unit 400 are located on the optical path of the first light ray along the second direction D2. That is, both the focusing unit 300 and the image stabilization unit 400 are located between the second optical path adjustment unit 200 and the image side. The order of the focusing unit 300 and the image stabilization unit 400 is not limited, and they are spaced apart along the second direction D2.

[0141] In this embodiment, the image stabilization unit 400 and the focusing unit 300 are configured in different ways, which can form lens assemblies with different sizes and shapes, making the lens assembly compact and small in size, so as to achieve miniaturization.

[0142] See you again Figure 4 and Figure 5In some embodiments, the lens assembly may further include an aperture stop (not shown) and a filter 500. The aperture stop can be a component that constrains and limits the incident light, used to limit the size of the incident light and control the depth of field. The aperture stop is located closest to the object side and at the front end of the first optical path adjustment unit 100, so that the incident light must pass through the aperture stop before entering the lens assembly.

[0143] For example, the aperture stop can be an aperture stop, the shape of the effective light passage of the aperture stop can be circular, the surface of the effective light passage of the aperture stop can be perpendicular to the first optical axis segment z1 of the optical axis of the lens assembly, and the center of the effective light passage of the aperture stop can be located on the first optical axis segment z1.

[0144] The filter 500 is located near the image side; for example, the filter 500 is located on one side of the image side of the focusing unit 300. The filter 500 is used to filter infrared light in the light, improve the effective resolution and color reproduction of the lens, and make the image clearer and more stable.

[0145] In some embodiments, when the lens assembly is photographing a distant object, n light rays at different angles enter the lens assembly. The light paths can be parallel to the optical axis or tilted relative to the optical axis, and the direction of light propagation depends on the angle of the incident light.

[0146] See you again Figure 4 and Figure 5 Taking the first ray A1 entering the lens assembly as an example, the first ray A1 enters along a direction perpendicular to the rear shell 30, that is, the first ray A1 enters the lens assembly along the optical axis.

[0147] The first ray A1 enters the first optical path adjustment unit 100 along the first optical axis segment z1 and is transmitted to the first reflecting surface 101. The first ray A1 is reflected at the first reflecting surface 101, changing the optical path, and continues to propagate along the first direction D1. In this scenario, the incident direction D0 is parallel to the direction of the first optical axis segment z1 (z-axis direction), the first direction D1 is parallel to the direction of the second optical axis segment z2 (x-axis direction), and the incident direction D0 is perpendicular to the first direction D1.

[0148] The first ray A1, traveling along the x-axis, enters the second optical path adjustment unit 200. It is reflected at the second reflecting surface 201, changing its path and propagating to the third reflecting surface 202. The first ray A1 is reflected again at the third reflecting surface 202, changing its path and propagating along the second direction D2 to the image side. In this scenario, the second direction D2 is parallel to the direction of the third optical axis segment z3 (y-axis direction) and perpendicular to the first direction D1.

[0149] exist Figure 6In the lens assembly shown, the second direction D2 is parallel to the direction (x-axis direction) of the third optical axis segment z3, and the second direction D2 is parallel to the first direction D1, but in opposite directions.

[0150] Figure 7 This is a schematic diagram of the optical path of the lens assembly provided in an embodiment of this application. Figure 7 for Figure 3 Another perspective of the side view.

[0151] Combination Figure 4 and Figure 7 As shown, in some embodiments, for other light rays A that are tilted relative to the optical axis n-1 Other light rays A n-1 The light enters the first optical path adjustment unit 100 along a direction that forms a certain angle with respect to the first optical axis segment z1, and is transmitted to the first reflecting surface 101. Other light rays A n-1 Reflection occurs at the first reflecting surface 101, changing the light path and allowing it to continue propagating along the first direction D1. In this scenario, the incident direction D0 has a certain angle with the direction of the first optical axis segment z1 (z-axis direction), and the first direction D1 has a certain angle with the direction of the second optical axis segment z2 (x-axis direction). The incident direction D0 and the first direction D1 can be perpendicular or not perpendicular.

[0152] The first ray A1, traveling along the first direction D1, enters the second optical path adjustment unit 200. The first ray A1 is reflected at the second reflecting surface 201, changing its optical path direction and propagating to the third reflecting surface 202. The first ray A1 is reflected again at the third reflecting surface 202, changing its optical path and propagating along the second direction D2 to the image side. In this scenario, the second direction D2 and the direction of the third optical axis segment z3 (y-axis direction) have a certain angle; the second direction D2 and the first direction D1 can be perpendicular or not perpendicular.

[0153] exist Figure 6 In the lens assembly shown, the direction of the second direction D2 and the direction of the third optical axis segment z3 (x-axis direction) have a certain angle. The second direction D2 and the first direction D1 can be parallel or not parallel, but their directions are opposite.

[0154] The lens assembly provided by the embodiment of the present application deflects the light transmission path in the lens assembly by using the reflection of the first optical path adjustment unit 100. For example, the optical path of the first light ray is adjusted from the incident direction along the z-axis to propagate along the x-axis direction, so that the light ray no longer propagates completely along the z-axis direction. In this way, the component volume originally stacked in the longitudinal direction (such as the z-axis direction) can be converted into the transverse direction (such as the x-axis direction), so as to reduce the space occupied by the lens assembly in the z-axis direction of the electronic device, thereby meeting the thin and light characteristics of the electronic device.By using the second optical path adjustment unit 200 to transmit and / or reflect the optical path of the first light ray, the purpose of optical path turning can be achieved. For example, the propagation along the x-axis direction is adjusted to propagate along the y-axis direction, thereby reducing the total length of the lens assembly. In this way, by using the first optical path adjustment unit 100 and the second optical path adjustment unit 200 to perform multiple transmissions and / or reflections on the first light ray, an ultra-long focal length can be achieved while meeting the thin and light requirements of the electronic device. At the same time, the lens assembly has a focusing function and an anti-shake function, and the focusing unit 300 and the anti-shake unit 400 are used to process the first light ray to improve the imaging quality.

[0155] In some embodiments, the lens assembly has an effective focal length F (unit: mm); as <( Figure 5 shown, the lens assembly has a length L (unit: mm) in the first direction (x-axis direction). Among them, the length L is the distance between the outermost sides of the first optical path adjustment unit 100 and the second optical path adjustment unit 200 along the x-axis direction.

[0156] The length L and the effective focal length F satisfy: 0.6 < L / F < 0.9; the effective focal length F satisfies: F > 40mm, preferably, F > 45mm.

[0157] Exemplarily, the length L can be 31.51mm, 36.23mm, 36.3mm, 36.7mm, 38.5mm, 39.4mm, 39.42mm or 39.59mm, etc. The effective focal length F can be 47.95mm, etc. L / F can be 0.6, 0.66, 0.76, 0.77, 0.8, 0.82, 0.83 or 0.9, etc.

[0158] In this way, by restricting the effective focal length F of the lens assembly, the lens assembly has an ultra-long focal length. And by controlling the ratio of the length of the optical total length of the telephoto lens assembly in the x-axis direction to the effective focal length F, the length of the telephoto lens assembly can be controlled in the normal direction of the imaging surface, that is, the horizontal direction in normal use, and the structural size of the telephoto lens assembly can be prevented from being too large, so as to better meet the requirements for small size and compact structure of portable electronic devices.

[0159] In some embodiments, the lens assembly has an entrance pupil diameter EPD (unit: mm); as Figure 5As shown, the lens assembly has a width W (in mm) along the second direction (y-axis direction). The width W is the distance between the outermost part of the second optical path adjustment unit 200 and the image side (such as the filter 500) along the y-axis direction.

[0160] The width W and the entrance pupil diameter EPD satisfy: 2 <W / EPD<2.8。

[0161] For example, the width W can be 33.34mm, 33.62mm, 34.25mm, 35.33mm, 36.73mm, 37.21mm, 37.32mm, or 28.4mm, etc. The entrance pupil diameter EPD can be 10.7mm, 13.61mm, 13.69mm, 13.7mm, 13.74mm, or 14.06mm, etc. The W / EPD can be 2, 2.07, 2.44, 2.45, 2.46, 2.59, 2.68, 2.72, or 2.8, etc.

[0162] In this way, by controlling the ratio of the width of the telephoto lens assembly in the vertical y-axis direction to the entrance pupil diameter, the structural size of the telephoto lens assembly can be effectively guaranteed not to be too large, so that the portable electronic device with it installed can meet the requirements of small size and compact structure.

[0163] In some embodiments, such as Figure 4 As shown, the telephoto lens assembly has a height H in the z-axis direction, and H < 13mm. Here, height H is the maximum height of the first optical path adjustment unit 100 or the image stabilization unit 400 along the z-axis direction.

[0164] In this way, by rationally designing the lens assembly and chopping the lens unit, the structural size of the telephoto optical imaging system can be effectively guaranteed not to be too large, so that the portable electronic devices installed with it can meet the market demand for small size and compact structure.

[0165] In some embodiments, the focusing unit 300 has a focal length FGA (in mm), and the focal length FGA and the effective focal length F of the lens assembly satisfy: 0.7 < |FGA / F| < 1.2.

[0166] For example, the FGA can be 35.98mm, 36.42mm, 42.1mm, 43.21mm, 45.22mm, or 45.33mm, etc. |FGA / F| can be 0.7, 0.75, 0.76, 0.77, 0.88, 0.9, 0.94, 0.95, 1.15, or 1.2, etc.

[0167] In this way, by using the effective focal length F of the lens assembly, it is beneficial to reasonably set the focal length FGA of the focusing unit 300 in the lens assembly, so as to reduce the variation of various aberrations, mainly spherical aberration, when the lens assembly focuses from an object at infinity to a closer object, while ensuring a better balance between the size of the lens assembly and the image quality.

[0168] In some embodiments, the image stabilization unit 400 has a focal length FGO (in mm), and the focal length FGO and the effective focal length F of the lens assembly satisfy: 1.0 < |FGO / F| < 1.6.

[0169] For example, FGO can be 51.16mm, 54.65mm, 55.18mm, 57.85mm, 61.79mm, 67.54mm, 67.56mm, or 75mm, etc. |FGO / F| can be 1, 1.07, 1.14, 1.15, 1.21, 1.29, 1.41, 1.56, or 1.6, etc.

[0170] In this way, by using the effective focal length F of the lens assembly, it is possible to reasonably set the focal length FGO of the image stabilization unit 400 in the lens assembly, so as to compensate for the image shift caused by the lens tilting at a certain angle due to hand tremors or body shaking, while ensuring a better balance between the size of the lens assembly and the image quality.

[0171] In some embodiments, the lens assembly has an aperture value F#, which satisfies: F# < 4.5.

[0172] For example, F# can be 3.41, 3.49, 3.5, 3.52, 4.48, or 4.5, etc.

[0173] This helps to increase the entrance pupil diameter of the lens assembly and improve the image quality of the lens assembly in low-light environments.

[0174] In some embodiments, the focusing unit 300 has a total thickness TGA (in mm), wherein the total thickness TGA is the distance between the object-side surface of the lens adjacent to the object side and the image-side surface of the lens adjacent to the image side, for example, as... Figure 5 As shown, the total thickness TGA is the distance between the object side surface of the first lens 301 and the image side surface of the fourth lens 304.

[0175] The total thickness (TGA) and the entrance pupil diameter (EPD) of the lens assembly satisfy: 0.65 <TGA / EPD<1.0。

[0176] Exemplarily, the total thickness TGA can be 9.3 mm, 9.84 mm, 10.29 mm, 10.31 mm, 10.51 mm, 10.6 mm, 12.46 mm, etc. The ratio of TGA to EPD can be 0.65, 0.68, 0.72, 0.75, 0.76, 0.89, 0.99, 1.0, etc.

[0177] Thus, by controlling the ratio of the total thickness TGA of the focusing unit 300 of the telephoto lens assembly to the entrance pupil diameter EPD, the length of the telephoto lens assembly can be controlled in the normal direction of the imaging plane, that is, the horizontal direction during normal use, preventing the structural size of the telephoto lens assembly from being too large. At the same time, a relatively small total thickness of the focusing unit 300 can be ensured, reducing the requirements for the motor stroke and accuracy. Therefore, the requirements for small size and compact structure of the portable electronic device can be better met.

[0178] In some embodiments, the anti-shake unit 400 has a total thickness TGO (unit: mm), where the total thickness TGO is the distance between the object side surface of the lens adjacent to the object side and the image side surface of the lens adjacent to the image side. For example, as Figure 5 shown, the total thickness TGO is the distance between the object side surface of the fifth lens 401 and the image side surface of the eighth lens 404.

[0179] The total thickness TGO and the entrance pupil diameter EPD of the lens assembly satisfy: 0.6 < TGO / EPD < 1.0.

[0180] Exemplarily, the total thickness TGO can be 8.3 mm, 8.38 mm, 8.62 mm, 8.92 mm, 9.41 mm, 9.48 mm, 9.52 mm, 10.35 mm, etc. The ratio of TGO to EPD can be 0.6, 0.61, 0.63, 0.65, 0.67, 0.69, 0.7, 0.97, 1.0, etc.

[0181] Thus, by controlling the ratio of the total thickness TGO of the anti-shake unit 400 of the telephoto lens assembly to the entrance pupil diameter EPD, the length of the telephoto lens assembly can be controlled in the normal direction of the imaging plane, that is, the horizontal direction during normal use, preventing the structural size of the telephoto lens assembly from being too large. At the same time, a relatively small total thickness of the anti-shake unit 400 can be ensured, reducing the requirements for the motor stroke and accuracy. Therefore, the requirements for small size and compact structure of the portable electronic device can be better met.

[0182] In some embodiments, the focusing unit 300 has a focusing movement stroke DGA (unit: mm), and the focusing movement stroke DGA satisfies: 2.5 < DGA < 3.5. Here, the focusing movement stroke DGA refers to the movement stroke of the focusing unit 300 when focusing from an infinitely distant object to a nearby object at 1 meter.

[0183] For example, the DGA can be 2.5mm, 2.73mm, 2.8mm, 3.03mm, 3.06mm, 3.21mm or 3.5mm, etc.

[0184] This allows for a reasonable allocation of the drive motor's travel distance while ensuring the motor has good focusing accuracy.

[0185] In some embodiments, the image stabilization unit 400 has an image stabilization angle OA (in degrees) and an image stabilization stroke DGO (in mm), the image stabilization stroke also referred to as image stabilization translation. The image stabilization angle OA and the image stabilization stroke DGO satisfy: 1.0 < |DGO / OA| < 1.4, in mm / °.

[0186] For example, OA can be 0.5°, etc. DGO can be 0.52mm, 0.55mm, 0.57mm, 0.62mm or 0.68mm, etc. |DGO / OA| can be 1.0, 1.05, 1.1, 1.11, 1.14, 1.25, 1.35, 1.37 or 1.4, etc.

[0187] This allows for a reduction in the travel distance of the drive motor while ensuring a sufficiently large stabilization angle OA, thereby compressing the size of the stabilization unit 400, and simultaneously ensuring that the telephoto lens assembly has good optical performance while also achieving structural miniaturization.

[0188] The lens assembly provided in this application embodiment utilizes the transmission and / or reflection effects of the first optical path adjustment unit 100 and the second optical path adjustment unit 200 to alter the propagation path of light. This not only enables ultra-long focal lengths but also reduces the size of the lens assembly, making its structure compact and minimizing its footprint within the electronic device, thus meeting the trend towards thinner and lighter electronic devices. Furthermore, constraining the parameters of each component within the lens assembly not only reduces the size of each component, resulting in a more compact and smaller lens assembly, but also improves image quality, reduces the requirements for motor travel and precision, and ensures significant weight reduction in the focusing and image stabilization components.

[0189] The structure and performance of the lens assembly provided in this application will be described below with reference to specific embodiments (Embodiments 1 to 8). For ease of description, the first optical path adjustment unit 100 is referred to as GP1, the second optical path adjustment unit 200 as GP2, the focusing unit 300 as GA, and the image stabilization unit 400 as GO.

[0190] Example 1:

[0191] Figure 8 This is a schematic diagram of the lens assembly provided in Embodiment 1 of this application. The following refers to... Figure 8The structure and performance of the lens assembly provided in Embodiment 1 of this application are described.

[0192] like Figure 8 As shown, the lens assembly, along the optical axis from the object side to the image side, includes a first optical path adjustment unit GP1, an image stabilization unit GO, a second optical path adjustment unit GP2, and a focusing unit GA. An aperture stop is located at the front end of GP1, and a filter 500 is located on the image side of GA. The lens assembly provided in Embodiment 1 has a length L = 39.59 mm and a width W = 33.34 mm.

[0193] The object side has an object plane. The surface of the aperture stop is S1 (as shown in Table 1-1). GP1 includes an object-side surface S2 and an image-side surface S3, wherein the object-side surface S2 corresponds to... Figure 4 The first incident light surface 102 shown corresponds to the image side surface S3. Figure 4 The first light-emitting surface 103 shown below will not be described in detail. GO includes four lenses, namely lenses L1, L2, L3, and L4, wherein lenses L1, L2, L3, and L4 correspond to... Figure 5 The fifth lens 401, sixth lens 402, seventh lens 403, and eighth lens 404 shown below will not be described in detail. Lens L1 includes an object-side surface S4 and an image-side surface S5; lens L2 includes an object-side surface and an image-side surface S6, with the object-side surface of lens L2 fitting against the image-side surface S5 of lens L1; lens L3 includes an object-side surface S7 and an image-side surface S8; lens L4 includes an object-side surface and an image-side surface S9, with the object-side surface of lens L4 fitting against the image-side surface S8 of lens L3. GP2 includes an object-side surface S10 and an image-side surface S11, wherein the object-side surface S10 corresponds to... Figure 5 The second incident surface 203 shown corresponds to the image side surface S11. Figure 5 The second light-emitting surface 204 shown below will not be described in detail. The GA includes four lenses, namely lenses L5, L6, L7, and L8, where lenses L5, L6, L7, and L8 correspond to... Figure 5 The first lens 301, second lens 302, third lens 303, and fourth lens 304 shown are not described in detail below. Lens L5 includes an object-side surface S12 and an image-side surface S13; lens L6 includes an object-side surface S14 and an image-side surface S15; lens L7 includes an object-side surface S16 and an image-side surface S17; and lens L8 includes an object-side surface S18 and an image-side surface S19. Filter 500 includes an object-side surface S20 and an image-side surface S21. The image side has an image plane S0, which can be understood as the imaging plane, and is not described in detail below.

[0194] In GP1, the object-side surface S2 convexes towards the object axis (abbreviated as: convex surface), and the image-side surface S3 convexes towards the object axis (abbreviated as: concave surface). In GO, the object-side surface S4 of lens L1 is convex towards the optical axis, and the image-side surface S5 is concave towards the optical axis. The object-side surface of lens L2 is convex towards the optical axis, and the image-side surface S6 is convex towards the optical axis. The object-side surface S7 of lens L3 is concave towards the optical axis, and the image-side surface S8 is concave towards the optical axis. The object-side surface of lens L4 is convex towards the optical axis, and the image-side surface S9 is convex towards the optical axis. The first reflecting surface S10 and the second reflecting surface S11 of GP2 are flat at the circumference. In GA, the object-side surface S12 of lens L5 is concave towards the optical axis, and the image-side surface S13 is convex towards the optical axis. The object-side surface S14 of lens L6 is convex towards the optical axis, and the image-side surface S15 is convex towards the optical axis. The object-side surface S16 of lens L7 is concave at the optical axis, and the image-side surface S17 is convex at the optical axis. The object-side surface S18 of lens L8 is concave at the optical axis, and the image-side surface S19 is concave at the optical axis.

[0195] Table 1-1 shows the optical parameters of the lens assembly provided in Embodiment 1; Table 1-2 shows the aspherical coefficient of the lens assembly provided in Embodiment 1; Table 1-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Embodiment 1; Table 1-4 shows the parameter relationships of each element in the lens assembly provided in Embodiment 1.

[0196] In some embodiments, the optical parameters of each element in the lens assembly can be set according to the data shown in Tables 1-1, 1-2, 1-3 and 1-4.

[0197] Table 1-1 Optical parameters of the lens assembly provided in Example 1

[0198]

[0199] Table 1-2 Aspheric coefficients of the lens assembly provided in Example 1

[0200] Face number S2 S12 S13 S14 S15 K 2.407721E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A4 -1.345192E-02 9.543951E-01 1.155489E+00 -3.351480E-01 -2.277851E-01 A6 -1.470406E-04 1.989927E-02 1.311470E-02 -7.880388E-02 -4.718639E-02 A8 -9.623054E-06 1.472788E-02 6.742906E-02 1.031340E-01 6.527017E-02 A10 3.947387E-06 5.916398E-03 -1.394395E-02 -3.463036E-02 -2.703750E-02 A12 -6.584646E-08 -1.091420E-03 1.234572E-02 1.077324E-02 1.080957E-02 A14 3.527235E-06 2.005607E-03 -2.013046E-03 -3.669989E-04 -9.021311E-03 A16 -1.987588E-06 7.997264E-04 3.427218E-03 4.884987E-03 5.740769E-03 A18 2.923409E-04 -1.806216E-04 1.730054E-03 -2.323708E-03 A20 -7.517885E-04 -4.210366E-03 -3.600709E-03 2.596472E-03 A22 -5.050329E-06 -1.498711E-03 -1.846968E-03 -2.612505E-03 A24 5.105977E-05 -6.903980E-04 -2.004359E-04 1.132854E-03 A26 -1.736322E-05 -8.075504E-04 -9.460569E-04 -6.501718E-04 A28 1.464922E-04 1.321460E-04 -4.089735E-04 4.272058E-04 A30 1.904151E-05 8.946492E-05 -1.108455E-06 -8.666230E-05 Face number S16 S17 S18 S19 K 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A4 -4.251209E-01 -6.952833E-01 2.367159E+00 1.417779E+00 A6 4.570958E-02 1.440611E-01 -1.614020E-01 -2.249601E-01 A8 -4.210512E-03 -2.823402E-02 1.252307E-01 7.158619E-02 A10 -3.190144E-03 -3.242393E-03 -5.360863E-02 -2.753475E-02 A12 5.987378E-03 6.759006E-03 2.862152E-02 9.645725E-03 A14 -6.404681E-03 -7.308602E-03 -1.603577E-02 -4.639094E-03 A16 5.856904E-03 6.327826E-03 9.901702E-03 2.142768E-03 A18 -3.403992E-03 -3.875504E-03 -5.379547E-03 -1.296157E-03 A20 2.500729E-03 3.412253E-03 4.811447E-03 1.340571E-03 A22 -2.301870E-03 -2.508701E-03 -3.243007E-03 -7.943099E-04 A24 1.051843E-03 1.558781E-03 2.377038E-03 6.333634E-04 A26 -6.422839E-04 -1.262795E-03 -1.840964E-03 -2.808962E-04 A28 5.000325E-04 7.872988E-04 8.590389E-04 6.005404E-07 A30 -1.293510E-04 -1.965955E-04 -1.649649E-04 6.451630E-06

[0201] Table 1-3 Relevant data of the GA and GO units in the lens assembly provided in Example 1

[0202]

[0203]

[0204] Table 1-4 shows the parameter relationships of each component in the lens assembly provided in Example 1.

[0205] Conditional expression Value F#<4.5 3.52 0.65<TGA / EPD<1.0 0.76 0.6<TGO / EPD<1.0 0.70 0.7<|FGA / F|<1.2 0.94 1.0<|FGO / F|<1.6 1.14 2.5<DGA<3.5 3.03 1.0<|DGO / OA|<1.4 1.10 0.6<L / F<0.9 0.83 2<W / EPD<2.8 2.45

[0206] It should be noted that Table 1-1 presents the surface type, radius of curvature, thickness or distance, material, refractive index, Abbe number, and focal length of each lens, aperture stop, and filter 500 in the lens assembly provided in Embodiment 1. Specifically, the radius of curvature in Table 1-1 refers to the radius of curvature of the object-side or image-side of the lens corresponding to each surface number at the optical axis. "Infinite" in the "Radius of Curvature" parameter series indicates that the object-side or image-side of the lens is a plane. "Blank" in the "Material" parameter series indicates that the object-side or image-side of the lens is adjacent to air; the corresponding "Refractive Index," "Abbe Number," and "Focal Length" parameter series also have "Blank" fields.

[0207] In Example 1, referring to Table 1-1, the effective focal length of the lens assembly is F = 47.95mm, the aperture number is F# = 3.52, the field of view (FOV) is 8.4°, and the entrance pupil diameter (EPD) is 13.61mm.

[0208] Filters 500, GP1, GO and GA can be made of glass or plastic, as detailed in Table 1-1.

[0209] The object surface, S1 to S21, and the image surface are of spherical or aspherical type, wherein the aspherical coefficient can be calculated based on the aspherical curve equation of the foregoing embodiment.

[0210] Refer to Table 1-2, which presents the aspherical coefficients of surfaces S2, S12 to S19 using aspherical types. Here, K is the conical coefficient in the aspherical curve equation, and A4, A6, ... A30 are the 4th to 30th order aspherical coefficients of each surface, corresponding to a1, a2, ... a30 in the aspherical curve equation, respectively. 13 .

[0211] Referring to Table 1-3, the focal length of the GA unit is FGA = 45.22mm, the total thickness of the GA unit is TGA = 10.31mm, the focus travel distance of the GA unit is DGA = 3.03mm, the focal length of the GO unit is FGO = 54.65mm, the total thickness of the GO unit is TGO = 9.52mm, the image stabilization translation amount of the GO unit is DGO = 0.549mm, and the image stabilization angle is OA = 0.5°.

[0212] Wherein, the total thickness TGA of the GA unit is the distance between the object side surface S12 of lens L5 and the image side surface S19 of lens L8, and the total thickness TGO of the GO unit is the distance between the object side surface S4 of lens L1 and the image side surface S9 of lens L4.

[0213] Refer to Table 1-4, which presents the parameter relationships of each component in the lens assembly. Specifically, the aperture value F# of the lens assembly is 3.52; the relationship between the total thickness TGA of the focusing unit GA and the entrance pupil diameter EPD is TGA / EPD = 0.76; the relationship between the total thickness TGO of the image stabilization unit GO and the entrance pupil diameter EPD is TGO / EPD = 0.7; the relationship between the focal length FGA of the focusing unit GA and the effective focal length F of the lens assembly is |FGA / F| = 0.94; the relationship between the focal length FGO of the image stabilization unit GO and the effective focal length F of the lens assembly is |FGO / F| = 1.14; the focusing travel distance DGA of the focusing unit GA is 3.03; the relationship between the stabilization angle OA and the stabilization travel distance DGO of the image stabilization unit GO is |DGO / OA| = 1.1; the relationship between the length L of the lens assembly and the effective focal length F is L / F = 0.83; and the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD = 2.45.

[0214] Figure 9 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 1 of this application. Among them, Figure 9 (a) is a field curvature diagram of the lens assembly provided in Embodiment 1 of this application. Figure 9 The solid line in (a) represents the meridional curve. Figure 9 The dashed line in (a) represents the sagittal field curve; Figure 9 (b) is a distortion diagram of the lens assembly provided in Embodiment 1 of this application.

[0215] Depend on Figure 9 As shown in the field curvature diagram (a), both the sagittal and meridional field curvatures are controlled within a small range, reflecting good control over the curvature of the imaging plane. Figure 9 As shown in the distortion diagram in Figure (b), the lens assembly provided in Embodiment 1 has smaller distortion, which means that the image deformation caused by the main beam is smaller and the imaging distortion effect is lower.

[0216] Therefore, the lens assembly provided in Embodiment 1 can achieve the goals of telephoto characteristics, miniaturization, compact structure, and high image quality, while ensuring sufficient weight reduction of the focusing unit GA and the image stabilization unit GO.

[0217] It should be noted that the definitions of the data in the tables of the following embodiments are the same as those in Tables 1-1 to 1-4 of Embodiment 1, and will not be repeated hereafter.

[0218] Example 2:

[0219] Figure 10 This is a schematic diagram of the lens assembly provided in Embodiment 2 of this application. The following refers to... Figure 10 The structure and performance of the lens assembly provided in Embodiment 2 of this application are described.

[0220] like Figure 10 As shown, the lens assembly, along the optical axis from the object side to the image side, includes a first optical path adjustment unit GP1, an image stabilization unit GO, a second optical path adjustment unit GP2, and a focusing unit GA. An aperture stop is located at the front end of GP1, and a filter 500 is located on the image side of GA. The lens assembly provided in Embodiment 2 has a length L = 39.42 mm and a width W = 33.62 mm.

[0221] The object side has an object plane. The surface of the aperture stop is S1 (as shown in Table 2-1). GP1 includes an object-side surface S2 and an image-side surface S3. GO includes four lenses, namely lenses L1, L2, L3, and L4. Lens L1 includes an object-side surface S4 and an image-side surface S5; lens L2 includes an image-side surface S6, and the object-side surface of lens L2 is in contact with the image-side surface S5 of lens L1; lens L3 includes an object-side surface S7 and an image-side surface S8; lens L4 includes an object-side surface S9 and an image-side surface S10. GP2 includes an object-side surface S11 and an image-side surface S12. GA includes four lenses, namely lenses L5, L6, L7, and L8. Lens L5 includes an object-side surface S13 and an image-side surface S14; lens L6 includes an object-side surface S15 and an image-side surface S16; lens L7 includes an object-side surface S17 and an image-side surface S18; lens L8 includes an object-side surface S19 and an image-side surface S20. The filter 500 includes an object-side surface S21 and an image-side surface S22. The image-side surface has an image plane S0.

[0222] In GP1, the object-side surface S2 is convex at the optical axis, and the image-side surface S3 is concave at the optical axis. In GO, the object-side surface S4 of lens L1 is convex at the optical axis, and the image-side surface S5 is concave at the optical axis. The object-side surface of lens L2 is convex at the optical axis, and the image-side surface S6 is convex at the optical axis. The object-side surface S7 of lens L3 is concave at the optical axis, and the image-side surface S8 is concave at the optical axis. The object-side surface S9 of lens L4 is convex at the optical axis, and the image-side surface S10 is convex at the optical axis. The first reflecting surface S11 and the second reflecting surface S12 of GP2 are flat at the circumference. In GA, the object-side surface S13 of lens L5 is concave at the optical axis, and the image-side surface S14 is convex at the optical axis. The object-side surface S15 of lens L6 is convex at the optical axis, and the image-side surface S16 is convex at the optical axis. The object-side surface S17 of lens L7 is concave at the optical axis, and the image-side surface S18 is convex at the optical axis. The object-side surface S19 of lens L8 is concave at the optical axis, and the image-side surface S20 is concave at the optical axis.

[0223] Table 2-1 shows the optical parameters of the lens assembly provided in Embodiment 2; Table 2-2 shows the aspherical coefficient of the lens assembly provided in Embodiment 2; Table 2-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Embodiment 2; Table 2-4 shows the parameter relationships of each element in the lens assembly provided in Embodiment 2.

[0224] In some embodiments, the optical parameters of each element in the lens assembly can be set according to the data shown in Tables 2-1, 2-2, 2-3 and 2-4.

[0225] Table 2-1 Optical parameters of the lens assembly provided in Example 2

[0226]

[0227]

[0228] Table 2-2 Aspheric coefficients of the lens assembly provided in Example 2

[0229]

[0230]

[0231] Table 2-3 Relevant data of the GA and GO units in the lens assembly provided in Example 2

[0232]

[0233]

[0234] Table 2-4 shows the parameter relationships of each component in the lens assembly provided in Example 2.

[0235] Conditional expression Value F#<4.5 3.50 0.65<TGA / EPD<1.0 0.75 0.6<TGO / EPD<1.0 0.69 0.7<|FGA / F|<1.2 0.95 1.0<|FGO / F|<1.6 1.15 2.5<DGA<3.5 3.00 1.0<|DGO / OA|<1.4 1.11 0.6<L / F<0.9 0.82 2<W / EPD<2.8 2.46

[0236] In Example 2, referring to Table 2-1, the effective focal length of the lens assembly is F = 47.95mm, the aperture number is F# = 3.5, the field of view (FOV) is 8.4°, and the entrance pupil diameter (EPD) is 13.69mm.

[0237] Filters 500, GP1, GO and GA can be made of glass or plastic, as detailed in Table 2-1.

[0238] The object surface, S1 to S22, and the image surface are of spherical or aspherical type, wherein the aspherical coefficient can be calculated based on the aspherical curve equation of the foregoing embodiment.

[0239] Refer to Table 2-2, which presents the aspherical coefficients of surfaces S2, S13 to S20 using aspherical types. Here, K is the conical coefficient in the aspherical curve equation, and A4, A6, ... A30 are the 4th to 30th order aspherical coefficients of each surface, corresponding to a1, a2, ... a30 in the aspherical curve equation, respectively. 13 .

[0240] Referring to Table 2-3, the focal length of the GA unit is FGA = 45.33mm, the total thickness of the GA unit is TGA = 10.29mm, the focus travel distance of the GA unit is DGA = 3.00mm, the focal length of the GO unit is FGO = 55.18mm, the total thickness of the GO unit is TGO = 9.41mm, the image stabilization translation amount of the GO unit is DGO = 0.554mm, and the image stabilization angle is OA = 0.5°.

[0241] Wherein, the total thickness TGA of the GA unit is the distance between the object side surface S13 of lens L5 and the image side surface S20 of lens L8, and the total thickness TGO of the GO unit is the distance between the object side surface S4 of lens L1 and the image side surface S10 of lens L4.

[0242] Refer to Table 2-4, which presents the parameter relationships of each component in the lens assembly. Specifically, the aperture value F# of the lens assembly is 3.5; the relationship between the total thickness TGA of the focusing unit GA and the entrance pupil diameter EPD is TGA / EPD = 0.75; the relationship between the total thickness TGO of the image stabilization unit GO and the entrance pupil diameter EPD is TGO / EPD = 0.69; the relationship between the focal length FGA of the focusing unit GA and the effective focal length F of the lens assembly is |FGA / F| = 0.95; the relationship between the focal length FGO of the image stabilization unit GO and the effective focal length F of the lens assembly is |FGO / F| = 1.15; the focusing travel distance DGA of the focusing unit GA is 3.00; the relationship between the stabilization angle OA and the stabilization travel distance DGO of the image stabilization unit GO is |DGO / OA| = 1.11; the relationship between the length L of the lens assembly and the effective focal length F is L / F = 0.82; and the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD = 2.46.

[0243] Figure 11 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 2 of this application. Among them, Figure 11 (a) is a field curvature diagram of the lens assembly provided in Embodiment 2 of this application. Figure 11 The solid line in (a) represents the meridional curve. Figure 11 The dashed line in (a) represents the sagittal field curve; Figure 11 (b) is a distortion diagram of the lens assembly provided in Embodiment 2 of this application.

[0244] Depend on Figure 11 As shown in the field curvature diagram (a), both the sagittal and meridional field curvatures are controlled within a small range, reflecting good control over the curvature of the imaging plane. Figure 11 As shown in the distortion diagram in Figure (b), the lens assembly provided in Embodiment 2 has less distortion, which means that the image deformation caused by the main beam is smaller and the imaging distortion effect is lower.

[0245] Therefore, the lens assembly provided in Embodiment 2 can achieve the goals of telephoto characteristics, miniaturization, compact structure and high image quality, while ensuring sufficient weight reduction of the focusing unit GA and the image stabilization unit GO.

[0246] Example 3:

[0247] Figure 12 This is a schematic diagram of the lens assembly provided in Embodiment 3 of this application. The following refers to... Figure 12 The structure and performance of the lens assembly provided in Embodiment 3 of this application are described.

[0248] like Figure 12 As shown, the lens assembly, along the optical axis from the object side to the image side, includes a first optical path adjustment unit GP1, an image stabilization unit GO, a second optical path adjustment unit GP2, and a focusing unit GA. An aperture stop is located at the front end of GP1, and a filter 500 is located on the image side of GA. The lens assembly provided in Embodiment 3 has a length L = 39.4 mm and a width W = 34.25 mm.

[0249] The object side has an object plane. The surface of the aperture stop is S1 (as shown in Table 3-1), and GP1 includes an object-side surface S2 and an image-side surface S3. GO includes four lenses, namely lenses L1, L2, L3, and L4. Lens L1 includes an object-side surface S4 and an image-side surface S5; lens L2 includes an object-side surface and an image-side surface S6, with the object-side surface of lens L2 fitting against the image-side surface S5 of lens L1; lens L3 includes an object-side surface S7 and an image-side surface S8; lens L4 includes an object-side surface and an image-side surface S9; the object-side surface of lens L4 fits against the image-side surface S8 of lens L9. GP2 includes an object-side surface S10 and an image-side surface S11. GA includes four lenses, namely lenses L5, L6, L7, and L8. Lens L5 includes an object-side surface S12 and an image-side surface S13; lens L6 includes an object-side surface S14 and an image-side surface S15; lens L7 includes an object-side surface S16 and an image-side surface S17; lens L8 includes an object-side surface S18 and an image-side surface S19. Filter 500 includes an object-side surface S20 and an image-side surface S21. The image side has an image plane S0.

[0250] In GP1, the object-side surface S2 is convex at the optical axis, and the image-side surface S3 is concave at the optical axis. In the image stabilization unit GO, the object-side surface S4 of lens L1 is convex at the optical axis, and the image-side surface S5 is concave at the optical axis. The object-side surface of lens L2 is convex at the optical axis, and the image-side surface S6 is convex at the optical axis. The object-side surface S7 of lens L3 is concave at the optical axis, and the image-side surface S8 is concave at the optical axis. The object-side surface of lens L4 is convex at the optical axis, and the image-side surface S9 is convex at the optical axis. The first reflecting surface S10 and the second reflecting surface S11 of GP2 are flat at the circumference. In the focusing unit GA, the object-side surface S12 of lens L5 is concave at the optical axis, and the image-side surface S13 is convex at the optical axis. The object-side surface S14 of lens L6 is convex at the optical axis, and the image-side surface S15 is convex at the optical axis. The object-side surface S16 of lens L7 is concave at the optical axis, and the image-side surface S17 is convex at the optical axis. The object-side surface S18 of lens L8 is concave at the optical axis, and the image-side surface S19 is concave at the optical axis.

[0251] Table 3-1 shows the optical parameters of the lens assembly provided in Embodiment 3; Table 3-2 shows the aspherical coefficient of the lens assembly provided in Embodiment 3; Table 3-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Embodiment 3; Table 3-4 shows the parameter relationships of each element in the lens assembly provided in Embodiment 3.

[0252] In some embodiments, the optical parameters of each element in the lens assembly can be set according to the data shown in Tables 3-1, 3-2, 3-3 and 3-4.

[0253] Table 3-1 Optical parameters of the lens assembly provided in Example 3

[0254]

[0255]

[0256] Table 3-2 Aspheric coefficients of the lens assembly provided in Example 3

[0257]

[0258]

[0259] Table 3-3 Relevant data of the GA and GO units in the lens assembly provided in Example 3

[0260] Parameter name Parameter value FGA (GA unit focal length, mm) 43.21 TGA (GA unit thickness, mm) 12.460 DGA (AF stroke, mm) 2.80 FGO (GO unit focal length, mm) 51.16 TGO (GO unit thickness, mm) 9.480 DGO (OIS translation amount, mm) 0.524 OA (OIS angle, °) 0.5

[0261] Table 3-4 shows the parameter relationships of each component in the lens assembly provided in Example 3.

[0262]

[0263]

[0264] In Example 3, referring to Table 3-1, the effective focal length of the lens assembly is F = 47.95mm, the aperture number is F# = 3.42, the field of view (FOV) is 8.4°, and the entrance pupil diameter (EPD) is 14.06mm.

[0265] Filters 500, GP1, GO and GA can be made of glass or plastic, as detailed in Table 3-1.

[0266] The object surface, S1 to S21, and the image surface are of spherical or aspherical type, wherein the aspherical coefficient can be calculated based on the aspherical curve equation of the foregoing embodiment.

[0267] Refer to Table 3-2, which presents the aspherical coefficients of surfaces S2, S12 to S19 using aspherical types. Here, K is the conical coefficient in the aspherical curve equation, and A4, A6, ... A30 are the 4th to 30th order aspherical coefficients of each surface, corresponding to a1, a2, ... a30 in the aspherical curve equation, respectively. 13 .

[0268] Referring to Table 3-3, the focal length of the GA unit is FGA = 43.21mm, the total thickness of the GA unit is TGA = 12.46mm, the focus travel distance of the GA unit is DGA = 2.80mm, the focal length of the GO unit is FGO = 51.16mm, the total thickness of the GO unit is TGO = 9.48mm, the image stabilization translation amount of the GO unit is DGO = 0.524mm, and the image stabilization angle is OA = 0.5°.

[0269] Wherein, the total thickness TGA of the GA unit is the distance between the object side surface S12 of lens L5 and the image side surface S19 of lens L8, and the total thickness TGO of the GO unit is the distance between the object side surface S4 of lens L1 and the image side surface S9 of lens L4.

[0270] Refer to Table 3-4, which presents the parameter relationships of each component in the lens assembly. Specifically, the aperture value F# of the lens assembly is 3.41; the relationship between the total thickness TGA of the focusing unit GA and the entrance pupil diameter EPD is TGA / EPD = 0.89; the relationship between the total thickness TGO of the image stabilization unit GO and the entrance pupil diameter EPD is TGO / EPD = 0.67; the relationship between the focal length FGA of the focusing unit GA and the effective focal length F of the lens assembly is |FGA / F| = 0.90; the relationship between the focal length FGO of the image stabilization unit GO and the effective focal length F of the lens assembly is |FGO / F| = 1.07; the focusing travel distance DGA of the focusing unit GA is 2.80; the relationship between the image stabilization angle OA and the image stabilization travel DGO of the image stabilization unit GO is |DGO / OA| = 1.05; the relationship between the length L of the lens assembly and the effective focal length F is L / F = 0.82; and the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD = 2.44.

[0271] Figure 13 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 3 of this application. Among them, Figure 13 (a) is a field curvature diagram of the lens assembly provided in Embodiment 3 of this application. Figure 13 The solid line in (a) represents the meridional curve. Figure 13 The dashed line in (a) represents the sagittal field curve; Figure 13 (b) is a distortion diagram of the lens assembly provided in Embodiment 3 of this application.

[0272] Depend on Figure 13 As shown in the field curvature diagram (a), both the sagittal and meridional field curvatures are controlled within a small range, reflecting good control over the curvature of the imaging plane. Figure 13 As shown in the distortion diagram in Figure (b), the lens assembly provided in Embodiment 3 has less distortion, which means that the image deformation caused by the main beam is smaller and the imaging distortion effect is lower.

[0273] Therefore, the lens assembly provided in Embodiment 3 can achieve the goals of telephoto characteristics, miniaturization, compact structure and high image quality, while ensuring sufficient weight reduction of the focusing unit GA and the image stabilization unit GO.

[0274] Example 4:

[0275] Figure 14 This is a schematic diagram of the lens assembly provided in Embodiment 4 of this application. The following refers to... Figure 14 The structure and performance of the lens assembly provided in Embodiment 4 of this application are described.

[0276] like Figure 14As shown, the lens assembly, along the optical axis from the object side to the image side, includes a first optical path adjustment unit GP1, an image stabilization unit GO, a second optical path adjustment unit GP2, and a focusing unit GA. An aperture stop is located at the front end of GP1, and a filter 500 is located on the image side of GA. The lens assembly provided in Embodiment 4 has a length L = 38.5 mm and a width W = 35.53 mm.

[0277] The object side has an object plane. The surface of the aperture stop is S1 (as shown in Table 4-1), and GP1 includes an object-side plane S2 and an image-side plane S3. GO includes three lenses, namely lenses L1, L2, and L3. Lens L1 includes an object-side plane S4 and an image-side plane S5; lens L2 includes an object-side plane and an image-side plane S6, with the object-side plane of lens L2 fitting against the image-side plane S5 of lens L1; lens L3 includes an object-side plane S7 and an image-side plane S8. GP2 includes an object-side plane S9 and an image-side plane S10. GA includes four lenses, namely lenses L4, L5, L6, and L7. Lens L4 includes an object-side plane S11 and an image-side plane S12; lens L5 includes an object-side plane S13 and an image-side plane S14; lens L6 includes an object-side plane S15 and an image-side plane S16; lens L7 includes an object-side plane S17 and an image-side plane S18. Filter 500 includes an object-side plane S19 and an image-side plane S20. The image side has an image plane S0.

[0278] In GP1, the object-side surface S2 is convex at the optical axis, and the image-side surface S3 is concave at the optical axis. In the image stabilization unit GO, the object-side surface S4 of lens L1 is convex at the optical axis, and the image-side surface S5 is concave at the optical axis. The object-side surface of lens L2 is convex at the optical axis, and the image-side surface S6 is convex at the optical axis. The object-side surface S7 of lens L3 is concave at the optical axis, and the image-side surface S8 is concave at the optical axis. The first reflecting surface S9 and the second reflecting surface S10 of GP2 are flat at the circumference. In the focusing unit GA, the object-side surface S11 of lens L4 is concave at the optical axis, and the image-side surface S12 is convex at the optical axis. The object-side surface S13 of lens L5 is convex at the optical axis, and the image-side surface S14 is convex at the optical axis. The object-side surface S15 of lens L6 is concave at the optical axis, and the image-side surface S16 is concave at the optical axis. The object-side surface S17 of lens L7 is concave at the optical axis, and the image-side surface S18 is concave at the optical axis.

[0279] Table 4-1 shows the optical parameters of the lens assembly provided in Embodiment 4; Table 4-2 shows the aspherical coefficient of the lens assembly provided in Embodiment 4; Table 4-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Embodiment 4; Table 4-4 shows the parameter relationships of each element in the lens assembly provided in Embodiment 4.

[0280] In some embodiments, the optical parameters of each element in the lens assembly can be set according to the data shown in Tables 4-1, 4-2, 4-3 and 4-4.

[0281] Table 4-1 Optical parameters of the lens assembly provided in Example 4

[0282]

[0283]

[0284] Table 4-2 Aspheric coefficients of the lens assembly provided in Example 4

[0285]

[0286]

[0287] Table 4-3 Relevant data of the GA and GO units in the lens assembly provided in Example 4

[0288] Parameter name Parameter value FGA (GA unit focal length, mm) 42.10 TGA (GA unit thickness, mm) 10.510 DGA (AF stroke, mm) 2.73 FGO (GO unit focal length, mm) 57.85 TGO (GO unit thickness, mm) 8.920 DGO (OIS translation amount, mm) 0.572 OA (OIS angle, °) 0.5

[0289] Table 4-4 shows the parameter relationships of each component in the lens assembly provided in Example 4.

[0290]

[0291]

[0292] In Example 4, referring to Table 4-1, the effective focal length of the lens assembly is F = 47.95mm, the aperture number is F# = 3.49, the field of view (FOV) is 8.4°, and the entrance pupil diameter (EPD) is 13.74mm.

[0293] Filters 500, GP1, GO and GA can be made of glass or plastic, as detailed in Table 4-1.

[0294] The object surface, S1 to S20, and the image surface are of spherical or aspherical type, wherein the aspherical coefficient can be calculated based on the aspherical curve equation of the foregoing embodiment.

[0295] Refer to Table 4-2, which presents the aspherical coefficients of surfaces S2, S7, S8, S11 to S18 using aspherical types. Here, K is the conical coefficient in the aspherical curve equation, and A4, A6, ... A30 are the 4th to 30th order aspherical coefficients of each surface, corresponding to a1, a2, ... a30 in the aspherical curve equation, respectively. 13 .

[0296] Referring to Table 4-3, the focal length of the GA unit is FGA = 42.1mm, the total thickness of the GA unit is TGA = 10.51mm, the focus travel distance of the GA unit is DGA = 2.73mm, the focal length of the GO unit is FGO = 57.85mm, the total thickness of the GO unit is TGO = 8.92mm, the image stabilization translation amount of the GO unit is DGO = 0.572mm, and the image stabilization angle is OA = 0.5°.

[0297] Wherein, the total thickness TGA of the GA unit is the distance between the object side surface S11 of lens L4 and the image side surface S18 of lens L7, and the total thickness TGO of the GO unit is the distance between the object side surface S4 of lens L1 and the image side surface S8 of lens L3.

[0298] Refer to Table 4-4, which presents the parameter relationships of each component in the lens assembly. Specifically, the aperture value F# of the lens assembly is 3.49; the relationship between the total thickness TGA of the focusing unit GA and the entrance pupil diameter EPD is TGA / EPD = 0.76; the relationship between the total thickness TGO of the image stabilization unit GO and the entrance pupil diameter EPD is TGO / EPD = 0.65; the relationship between the focal length FGA of the focusing unit GA and the effective focal length F of the lens assembly is |FGA / F| = 0.88; the relationship between the focal length FGO of the image stabilization unit GO and the effective focal length F of the lens assembly is |FGO / F| = 1.21; the focus travel distance DGA of the focusing unit GA is 2.73; the relationship between the image stabilization angle OA and the image stabilization travel DGO of the image stabilization unit GO is |DGO / OA| = 1.14; the relationship between the length L of the lens assembly and the effective focal length F is L / F = 0.80; and the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD = 2.59.

[0299] Figure 15 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 4 of this application. Among them, Figure 15 (a) is a field curvature diagram of the lens assembly provided in Embodiment 4 of this application. Figure 15 The solid line in (a) represents the meridional curve. Figure 15 The dashed line in (a) represents the sagittal field curve; Figure 15 (b) is a distortion diagram of the lens assembly provided in Embodiment 4 of this application.

[0300] Depend on Figure 15 As shown in the field curvature diagram (a), both the sagittal and meridional field curvatures are controlled within a small range, reflecting good control over the curvature of the imaging plane. Figure 15 As shown in the distortion diagram in Figure (b), the lens assembly provided in Embodiment 4 has less distortion, which means that the image deformation caused by the main beam is smaller and the imaging distortion effect is lower.

[0301] Therefore, the lens assembly provided in Embodiment 4 can achieve the goals of telephoto characteristics, miniaturization, compact structure and high image quality, while ensuring sufficient weight reduction of the focusing unit GA and the image stabilization unit GO.

[0302] Example 5:

[0303] Figure 16 This is a schematic diagram of the lens assembly provided in Embodiment 5 of this application. The following refers to... Figure 16 The structure and performance of the lens assembly provided in Embodiment 5 of this application are described.

[0304] like Figure 16 As shown, the lens assembly, along the optical axis from the object side to the image side, includes a first optical path adjustment unit GP1, an image stabilization unit GO, a second optical path adjustment unit GP2, and a focusing unit GA. An aperture stop is located at the front end of GP1, and a filter 500 is located on the image side of GA. The lens assembly provided in Embodiment 5 has a length L = 36.3 mm and a width W = 37.21 mm.

[0305] The object side has an object plane. The surface of the aperture stop is S1 (as shown in Table 5-1), and GP1 includes an object-side plane S2 and an image-side plane S3. GO includes three lenses, namely lenses L1, L2, and L3. Lens L1 includes an object-side plane S4 and an image-side plane S5; lens L2 includes an object-side plane and an image-side plane S6, with the object-side plane of lens L2 fitting against the image-side plane S5 of lens L1; lens L3 includes an object-side plane S7 and an image-side plane S8. GP2 includes an object-side plane S9 and an image-side plane S10. GA includes four lenses, namely lenses L4, L5, L6, and L7. Lens L4 includes an object-side plane S11 and an image-side plane S12; lens L5 includes an object-side plane S13 and an image-side plane S14; lens L6 includes an object-side plane S15 and an image-side plane S16; lens L7 includes an object-side plane S17 and an image-side plane S18. Filter 500 includes an object-side plane S19 and an image-side plane S20. The image side has an image plane S0.

[0306] In GP1, the object-side surface S2 is convex at the optical axis, and the image-side surface S3 is concave at the optical axis. In the image stabilization unit GO, the object-side surface S4 of lens L1 is convex at the optical axis, and the image-side surface S5 is concave at the optical axis. The object-side surface of lens L2 is convex at the optical axis, and the image-side surface S6 is concave at the optical axis. The object-side surface S7 of lens L3 is convex at the optical axis, and the image-side surface S8 is concave at the optical axis. The first reflecting surface S9 and the second reflecting surface S10 of GP2 are flat at the circumference. In the focusing unit GA, the object-side surface S11 of lens L4 is concave at the optical axis, and the image-side surface S12 is convex at the optical axis. The object-side surface S13 of lens L5 is convex at the optical axis, and the image-side surface S14 is convex at the optical axis. The object-side surface S15 of lens L6 is concave at the optical axis, and the image-side surface S16 is convex at the optical axis. The object-side surface S17 of lens L7 is concave at the optical axis, and the image-side surface S18 is concave at the optical axis.

[0307] Table 5-1 shows the optical parameters of the lens assembly provided in Embodiment 5; Table 5-2 shows the aspherical coefficient of the lens assembly provided in Embodiment 5; Table 5-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Embodiment 5; Table 5-4 shows the parameter relationships of each element in the lens assembly provided in Embodiment 5.

[0308] In some embodiments, the optical parameters of each element in the lens assembly can be set according to the data shown in Tables 5-1, 5-2, 5-3 and 5-4.

[0309] Table 5-1 Optical parameters of the lens assembly provided in Example 5

[0310]

[0311]

[0312] Table 5-2 Aspheric coefficients of the lens assembly provided in Example 5

[0313]

[0314]

[0315] Table 5-3 Relevant data of the GA and GO units in the lens assembly provided in Example 5

[0316] Parameter name Parameter value FGA (GA unit focal length, mm) 35.98 TGA (GA unit thickness, mm) 9.840 DGA (AF stroke, mm) 3.06 FGO (GO unit focal length, mm) 67.56 TGO (GO unit thickness, mm) 8.380 DGO (OIS translation amount, mm) 0.675 OA (OIS angle, °) 0.5

[0317] Table 5-4 shows the parameter relationships of each component in the lens assembly provided in Example 5.

[0318] Conditional expression Value F#<4.5 3.50 0.65<TGA / EPD<1.0 0.72 0.6<TGO / EPD<1.0 0.61 0.7<|FGA / F|<1.2 0.75 1.0<|FGO / F|<1.6 1.41 2.5<DGA<3.5 3.06 1.0<|DGO / OA|<1.4 1.35 0.6<L / F<0.9 0.76 2<W / EPD<2.8 2.72

[0319] In Example 5, referring to Table 5-1, the effective focal length of the lens assembly is F = 47.95mm, the aperture number is F# = 3.5, the field of view (FOV) is 8.4°, and the entrance pupil diameter (EPD) is 13.7mm.

[0320] Filters 500, GP1, GO and GA can be made of glass or plastic, as detailed in Table 5-1.

[0321] The object surface, S1 to S20, and the image surface are of spherical or aspherical type, wherein the aspherical coefficient can be calculated based on the aspherical curve equation of the foregoing embodiment.

[0322] Refer to Table 5-2, which presents the aspherical coefficients of surfaces S2, S7, S8, S11 to S18 using aspherical types. Here, K is the conical coefficient in the aspherical curve equation, and A4, A6, ... A30 are the 4th to 30th order aspherical coefficients of each surface, corresponding to a1, a2, ... a30 in the aspherical curve equation, respectively. 13 .

[0323] Referring to Table 5-3, the focal length of the GA unit is FGA = 35.98mm, the total thickness of the GA unit is TGA = 9.84mm, the focus travel distance of the GA unit is DGA = 3.06mm, the focal length of the GO unit is FGO = 67.56mm, the total thickness of the GO unit is TGO = 8.38mm, the image stabilization translation amount of the GO unit is DGO = 0.675mm, and the image stabilization angle is OA = 0.5°.

[0324] Wherein, the total thickness TGA of the GA unit is the distance between the object side surface S11 of lens L4 and the image side surface S18 of lens L7, and the total thickness TGO of the GO unit is the distance between the object side surface S4 of lens L1 and the image side surface S8 of lens L3.

[0325] Refer to Table 5-4, which presents the parameter relationships of each component in the lens assembly. Specifically, the aperture value F# of the lens assembly is 3.5; the relationship between the total thickness TGA of the focusing unit GA and the entrance pupil diameter EPD is TGA / EPD = 0.72; the relationship between the total thickness TGO of the image stabilization unit GO and the entrance pupil diameter EPD is TGO / EPD = 0.61; the relationship between the focal length FGA of the focusing unit GA and the effective focal length F of the lens assembly is |FGA / F| = 0.75; the relationship between the focal length FGO of the image stabilization unit GO and the effective focal length F of the lens assembly is |FGO / F| = 1.41; the focusing travel distance DGA of the focusing unit GA is 3.06; the relationship between the stabilization angle OA and the stabilization travel distance DGO of the image stabilization unit GO is |DGO / OA| = 1.35; the relationship between the length L of the lens assembly and the effective focal length F is L / F = 0.76; and the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD = 2.72.

[0326] Figure 17 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 5 of this application. Among them, Figure 17 (a) is a field curvature diagram of the lens assembly provided in Embodiment 5 of this application. Figure 17 The solid line in (a) represents the meridional curve. Figure 17 The dashed line in (a) represents the sagittal field curve; Figure 17 (b) is a distortion diagram of the lens assembly provided in Embodiment 5 of this application.

[0327] Depend on Figure 17 As shown in the field curvature diagram (a), both the sagittal and meridional field curvatures are controlled within a small range, reflecting good control over the curvature of the imaging plane. Figure 17 As shown in the distortion diagram in Figure (b), the lens assembly provided in Embodiment 5 has less distortion, which means that the image deformation caused by the main beam is smaller and the imaging distortion effect is lower.

[0328] Therefore, the lens assembly provided in Embodiment 5 can achieve the goals of telephoto characteristics, miniaturization, compact structure and high image quality, while ensuring sufficient weight reduction of the focusing unit GA and the image stabilization unit GO.

[0329] Example 6:

[0330] Figure 18 This is a schematic diagram of the lens assembly provided in Embodiment Six of this application. The following refers to... Figure 18 The structure and performance of the lens assembly provided in Embodiment Six of this application are described.

[0331] like Figure 18 As shown, the lens assembly, along the optical axis from the object side to the image side, includes a first optical path adjustment unit GP1, an image stabilization unit GO, a second optical path adjustment unit GP2, and a focusing unit GA. An aperture stop is located at the front end of GP1, and a filter 500 is located on the image side of GA. The lens assembly provided in Embodiment Six has a length L = 36.23 mm and a width W = 37.32 mm.

[0332] The object side has an object plane. The surface of the aperture stop is S1 (as shown in Table 6-1), and GP1 includes an object-side plane S2 and an image-side plane S3. GO includes three lenses, namely lenses L1, L2, and L3. Lens L1 includes an object-side plane S4 and an image-side plane S5; lens L2 includes an object-side plane S6 and an image-side plane S7; lens L3 includes an object-side plane S8 and an image-side plane S9. GP2 includes an object-side plane S10 and an image-side plane S11. GA includes four lenses, namely lenses L4, L5, L6, and L7. Lens L4 includes an object-side plane S12 and an image-side plane S13; lens L5 includes an object-side plane S14 and an image-side plane S15; lens L6 includes an object-side plane S16 and an image-side plane S17; lens L7 includes an object-side plane S18 and an image-side plane S19. Filter 500 includes an object-side plane S20 and an image-side plane S21. The image side has an image plane S0.

[0333] In GP1, the object-side surface S2 is convex at the optical axis, and the image-side surface S3 is concave at the optical axis. In the image stabilization unit GO, the object-side surface S4 of lens L1 is convex at the optical axis, and the image-side surface S5 is concave at the optical axis. The object-side surface S6 of lens L2 is convex at the optical axis, and the image-side surface S7 is concave at the optical axis. The object-side surface S8 of lens L3 is convex at the optical axis, and the image-side surface S9 is concave at the optical axis. The first reflecting surface S10 and the second reflecting surface S11 of GP2 are flat at the circumference. In the focusing unit GA, the object-side surface S12 of lens L4 is concave at the optical axis, and the image-side surface S13 is convex at the optical axis. The object-side surface S14 of lens L5 is convex at the optical axis, and the image-side surface S15 is convex at the optical axis. The object-side surface S16 of lens L6 is concave at the optical axis, and the image-side surface S17 is convex at the optical axis. The object-side surface S18 of lens L7 is concave at the optical axis, and the image-side surface S19 is concave at the optical axis.

[0334] Table 6-1 shows the optical parameters of the lens assembly provided in Embodiment 6; Table 6-2 shows the aspherical coefficient of the lens assembly provided in Embodiment 6; Table 6-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Embodiment 6; Table 6-4 shows the parameter relationships of each element in the lens assembly provided in Embodiment 6.

[0335] In some embodiments, the optical parameters of each element in the lens assembly can be set according to the data shown in Tables 6-1, 6-2, 6-3 and 6-4.

[0336] Table 6-1 Optical parameters of the lens assembly provided in Example 6

[0337]

[0338]

[0339] Table 6-2 Aspheric coefficients of the lens assembly provided in Example 6

[0340]

[0341]

[0342]

[0343] Table 6-3 Relevant data of the GA and GO units in the lens assembly provided in Example 6

[0344] Parameter name Parameter value FGA (GA unit focal length, mm) 36.42 TGA (GA unit thickness, mm) 10.510 DGA (AF stroke, mm) 3.21 FGO (GO unit focal length, mm) 61.79 TGO (GO unit thickness, mm) 8.620 DGO (OIS translation amount, mm) 0.623 OA (OIS angle, °) 0.5

[0345] Table 6-4 shows the parameter relationships of each component in the lens assembly provided in Example 6.

[0346] Conditional expression Value F#<4.5 3.49 0.65<TGA / EPD<1.0 0.76 0.6<TGO / EPD<1.0 0.63 0.7<|FGA / F|<1.2 0.76 1.0<|FGO / F|<1.6 1.29 2.5<DGA<3.5 3.21 1.0<|DGO / OA|<1.4 1.25 0.6<L / F<0.9 0.76 2<W / EPD<2.8 2.72

[0347] In Example 6, referring to Table 6-1, the effective focal length of the lens assembly is F = 47.95mm, the aperture number is F# = 3.49, the field of view (FOV) is 8.4°, and the entrance pupil diameter (EPD) is 13.74mm.

[0348] Filters 500, GP1, GO and GA can be made of glass or plastic, as detailed in Table 6-1.

[0349] The object surface, S1 to S21, and the image surface are of spherical or aspherical type, wherein the aspherical coefficient can be calculated based on the aspherical curve equation of the foregoing embodiment.

[0350] Refer to Table 6-2, which presents the aspherical coefficients of surfaces S2, S4 to S9, and S12 to S19 using aspherical types. Here, K is the conical coefficient in the aspherical curve equation, and A4, A6, ..., A30 are the 4th to 30th order aspherical coefficients of each surface, corresponding to a1, a2, ..., a... in the aspherical curve equation, respectively. 13 .

[0351] Referring to Table 6-3, the focal length of the GA unit is FGA = 36.42mm, the total thickness of the GA unit is TGA = 10.51mm, the focus travel distance of the GA unit is DGA = 3.21mm, the focal length of the GO unit is FGO = 61.79mm, the total thickness of the GO unit is TGO = 8.62mm, the image stabilization translation distance of the GO unit is DGO = 0.623mm, and the image stabilization angle is OA = 0.5°.

[0352] Wherein, the total thickness TGA of the GA unit is the distance between the object side surface S12 of lens L4 and the image side surface S19 of lens L7, and the total thickness TGO of the GO unit is the distance between the object side surface S4 of lens L1 and the image side surface S9 of lens L3.

[0353] Refer to Table 6-4, which presents the parameter relationships of each component in the lens assembly. Specifically, the aperture value F# of the lens assembly is 3.49; the relationship between the total thickness TGA of the focusing unit GA and the entrance pupil diameter EPD is TGA / EPD = 0.76; the relationship between the total thickness TGO of the image stabilization unit GO and the entrance pupil diameter EPD is TGO / EPD = 0.63; the relationship between the focal length FGA of the focusing unit GA and the effective focal length F of the lens assembly is |FGA / F| = 0.76; the relationship between the focal length FGO of the image stabilization unit GO and the effective focal length F of the lens assembly is |FGO / F| = 1.29; the focusing travel distance DGA of the focusing unit GA is 3.21; the relationship between the stabilization angle OA and the stabilization travel distance DGO of the image stabilization unit GO is |DGO / OA| = 1.25; the relationship between the length L of the lens assembly and the effective focal length F is L / F = 0.76; and the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD = 2.72.

[0354] Figure 19 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment Six of this application. Among them, Figure 19 (a) is a field curvature diagram of the lens assembly provided in Embodiment Six of this application. Figure 19 The solid line in (a) represents the meridional curve. Figure 19 The dashed line in (a) represents the sagittal field curve; Figure 19 (b) is a distortion diagram of the lens assembly provided in Embodiment Six of this application.

[0355] Depend on Figure 19 As shown in the field curvature diagram (a), both the sagittal and meridional field curvatures are controlled within a small range, reflecting good control over the curvature of the imaging plane. Figure 19 As shown in the distortion diagram in Figure (b), the lens assembly provided in Example 6 has less distortion, which means that the image deformation caused by the main beam is smaller and the imaging distortion effect is lower.

[0356] Therefore, the lens assembly provided in Embodiment Six can achieve the goals of telephoto characteristics, miniaturization, compact structure, and high image quality, while ensuring sufficient weight reduction of the focusing unit GA and the image stabilization unit GO.

[0357] Example 7:

[0358] Figure 20 This is a schematic diagram of the lens assembly provided in Embodiment Seven of this application. The following refers to... Figure 20 The structure and performance of the lens assembly provided in Embodiment 7 of this application are described.

[0359] like Figure 20As shown, the lens assembly, along the optical axis from the object side to the image side, includes a first optical path adjustment unit GP1, an image stabilization unit GO, a second optical path adjustment unit GP2, and a focusing unit GA. An aperture stop is located at the front end of GP1, and a filter 500 is located on the image side of GA. The lens assembly provided in Embodiment 7 has a length L = 36.7 mm and a width W = 28.4 mm. It should be noted that the structural characteristics of the lens assembly provided in Embodiment 7 can be referred to... Figure 6 The structural characteristics of the lens assembly shown are not elaborated here.

[0360] The object side has an object plane. The surface of the aperture stop is S1 (as shown in Table 7-1), and GP1 includes an object-side surface S2 and an image-side surface S3. GO includes four lenses, namely lenses L1, L2, L3, and L4. Lens L1 includes an object-side surface S4 and an image-side surface S5; lens L2 includes an object-side surface and an image-side surface S6, with the object-side surface of lens L2 fitting against the image-side surface S5 of lens L1; lens L3 includes an object-side surface S7 and an image-side surface S8; lens L4 includes an object-side surface S9 and an image-side surface S10. GP2 includes an object-side surface S11 and an image-side surface S12. GA includes four lenses, namely lenses L5, L6, L7, and L8. Lens L5 includes an object-side surface S13 and an image-side surface S14; lens L6 includes an object-side surface S15 and an image-side surface S16; lens L7 includes an object-side surface S17 and an image-side surface S18; lens L8 includes an object-side surface S19 and an image-side surface S20. The filter 500 includes an object-side surface S21 and an image-side surface S22. The image-side surface has an image plane S0.

[0361] In GP1, the object-side surface S2 is convex at the optical axis, and the image-side surface S3 is concave at the optical axis. In the image stabilization unit GO, the object-side surface S4 of lens L1 is convex at the optical axis, and the image-side surface S5 is concave at the optical axis. The object-side surface of lens L2 is convex at the optical axis, and the image-side surface S6 is convex at the optical axis. The object-side surface S7 of lens L3 is concave at the optical axis, and the image-side surface S8 is concave at the optical axis. The object-side surface S9 of lens L4 is convex at the optical axis, and the image-side surface S10 is flat at the circumference. The first reflecting surface S11 and the second reflecting surface S12 of GP2 are flat at the circumference. In the focusing unit GA, the object-side surface S13 of lens L5 is concave at the optical axis, and the image-side surface S14 is convex at the optical axis. The object-side surface S15 of lens L6 is convex at the optical axis, and the image-side surface S16 is convex at the optical axis. The object-side surface S17 of lens L7 is concave at the optical axis, and the image-side surface S18 is convex at the optical axis. The object-side surface S19 of lens L8 is concave at the optical axis, and the image-side surface S20 is concave at the optical axis.

[0362] Table 7-1 shows the optical parameters of the lens assembly provided in Embodiment 7; Table 7-2 shows the aspherical coefficient of the lens assembly provided in Embodiment 7; Table 7-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Embodiment 7; Table 7-4 shows the parameter relationships of each element in the lens assembly provided in Embodiment 7.

[0363] In some embodiments, the optical parameters of each element in the lens assembly can be set according to the data shown in Tables 7-1, 7-2, 7-3 and 7-4.

[0364] Table 7-1 Optical parameters of the lens assembly provided in Example 7

[0365]

[0366]

[0367] Table 7-2 Aspheric coefficients of the lens assembly provided in Example 7

[0368]

[0369]

[0370] Table 7-3 Relevant data of the GA and GO units in the lens assembly provided in Example 7

[0371] Parameter name Parameter value FGA (GA unit focal length, mm) 55.00 TGA (GA unit thickness, mm) 10.600 DGA (AF stroke, mm) 3.36 FGO (GO unit focal length, mm) 75.00 TGO (GO unit thickness, mm) 10.350 DGO (OIS translation amount, mm) 0.686 OA (OIS angle, °) 0.5

[0372] Table 7-4 shows the parameter relationships of each component in the lens assembly provided in Example 7.

[0373] Conditional expression Value F#<4.5 4.48 0.65<TGA / EPD<1.0 0.99 0.6<TGO / EPD<1.0 0.97 0.7<|FGA / F|<1.2 1.15 1.0<|FGO / F|<1.6 1.56 2.5<DGA<3.5 3.36 1.0<|DGO / OA|<1.4 1.37 0.6<L / F<0.9 0.77 2<W / EPD<2.8 2.07

[0374] In Example 7, referring to Table 7-1, the effective focal length of the lens assembly is F = 47.95mm, the aperture number is F# = 4.48, the field of view (FOV) is 8.4°, and the entrance pupil diameter (EPD) is 10.7mm.

[0375] Filters 500, GP1, GO and GA can be made of glass or plastic, as detailed in Table 7-1.

[0376] The object surface, S1 to S22, and the image surface are of spherical or aspherical type, wherein the aspherical coefficient can be calculated based on the aspherical curve equation of the foregoing embodiment.

[0377] Refer to Table 7-2, which presents the aspherical coefficients of surfaces S2, S13 to S20 using aspherical types. Here, K is the conical coefficient in the aspherical curve equation, and A4, A6, ... A30 are the 4th to 30th order aspherical coefficients of each surface, corresponding to a1, a2, ... a30 in the aspherical curve equation, respectively. 13 .

[0378] Referring to Table 7-3, the focal length of the GA unit is FGA = 55mm, the total thickness of the GA unit is TGA = 10.6mm, the focus travel distance of the GA unit is DGA = 3.36mm, the focal length of the GO unit is FGO = 75mm, the total thickness of the GO unit is TGO = 10.35mm, the image stabilization translation amount of the GO unit is DGO = 0.686mm, and the image stabilization angle is OA = 0.5°.

[0379] Wherein, the total thickness TGA of the GA unit is the distance between the object side surface S13 of lens L5 and the image side surface S20 of lens L8, and the total thickness TGO of the GO unit is the distance between the object side surface S4 of lens L1 and the image side surface S10 of lens L4.

[0380] Refer to Table 7-4, which presents the parameter relationships of each component in the lens assembly. Specifically, the aperture value F# of the lens assembly is 4.48; the relationship between the total thickness TGA of the focusing unit GA and the entrance pupil diameter EPD is TGA / EPD = 0.99; the relationship between the total thickness TGO of the image stabilization unit GO and the entrance pupil diameter EPD is TGO / EPD = 0.97; the relationship between the focal length FGA of the focusing unit GA and the effective focal length F of the lens assembly is |FGA / F| = 1.15; the relationship between the focal length FGO of the image stabilization unit GO and the effective focal length F of the lens assembly is |FGO / F| = 1.56; the focusing travel distance DGA of the focusing unit GA is 3.36; the relationship between the image stabilization angle OA and the image stabilization travel DGO of the image stabilization unit GO is |DGO / OA| = 1.37; the relationship between the length L of the lens assembly and the effective focal length F is L / F = 0.77; and the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD = 2.07.

[0381] Figure 21 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment Seven of this application. Among them, Figure 21 (a) is a field curvature diagram of the lens assembly provided in Embodiment 7 of this application. Figure 21 The solid line in (a) represents the meridional curve. Figure 21 The dashed line in (a) represents the sagittal field curve; Figure 21 (b) is a distortion diagram of the lens assembly provided in Embodiment 7 of this application.

[0382] Depend on Figure 21As shown in the field curvature diagram (a), both the sagittal and meridional field curvatures are controlled within a small range, reflecting good control over the curvature of the imaging plane. Figure 21 As can be seen from the distortion diagram in (b), the lens assembly provided in Embodiment 7 has less distortion, which means that the image deformation caused by the main beam is smaller and the imaging distortion effect is lower.

[0383] Therefore, the lens assembly provided in Embodiment 7 can achieve the goals of telephoto characteristics, miniaturization, compact structure and high image quality, while ensuring sufficient weight reduction of the focusing unit GA and the image stabilization unit GO.

[0384] Example 8:

[0385] Figure 22 This is a schematic diagram of the lens assembly provided in Embodiment 8 of this application. The following refers to... Figure 22 The structure and performance of the lens assembly provided in Embodiment 8 of this application are described.

[0386] like Figure 22 As shown, the lens assembly, along the optical axis from the object side to the image side, includes a first optical path adjustment unit GP1, an image stabilization unit GO, a second optical path adjustment unit GP2, and a focusing unit GA. An aperture stop is located at the front end of GP1, and a filter 500 is located on the image side of GA. The lens assembly provided in Embodiment Eight has a length L = 31.51 mm and a width W = 36.73 mm. It should be noted that the structural characteristics of the lens assembly provided in Embodiment Eight can be referred to... Figure 6 The structural characteristics of the lens assembly shown are not elaborated here.

[0387] The object side has an object plane. The surface of the aperture stop is S1 (as shown in Table 8-1), and GP1 includes an object-side plane S2 and an image-side plane S3. GO includes three lenses, namely lenses L1, L2, and L3. Lens L1 includes an object-side plane S4 and an image-side plane S5; lens L2 includes an object-side plane and an image-side plane S6, with the object-side plane of lens L2 fitting against the image-side plane S5 of lens L1; lens L3 includes an object-side plane S7 and an image-side plane S8. GP2 includes an object-side plane S9 and an image-side plane S10. GA includes four lenses, namely lenses L4, L5, L6, and L7. Lens L4 includes an object-side plane S11 and an image-side plane S12; lens L5 includes an object-side plane S13 and an image-side plane S14; lens L6 includes an object-side plane S15 and an image-side plane S16; lens L7 includes an object-side plane S17 and an image-side plane S18. Filter 500 includes an object-side plane S19 and an image-side plane S20. The image side has an image plane S0.

[0388] In GP1, the object-side surface S2 is convex at the optical axis, and the image-side surface S3 is concave at the optical axis. In the image stabilization unit GO, the object-side surface S4 of lens L1 is convex at the optical axis, and the image-side surface S5 is concave at the optical axis. The object-side surface of lens L2 is convex at the optical axis, and the image-side surface S6 is concave at the optical axis. The object-side surface S7 of lens L3 is convex at the optical axis, and the image-side surface S8 is concave at the optical axis. The first reflecting surface S9 and the second reflecting surface S10 of GP2 are flat at the circumference. In the focusing unit GA, the object-side surface S11 of lens L4 is concave at the optical axis, and the image-side surface S12 is convex at the optical axis. The object-side surface S13 of lens L5 is convex at the optical axis, and the image-side surface S14 is convex at the optical axis. The object-side surface S15 of lens L6 is concave at the optical axis, and the image-side surface S16 is convex at the optical axis. The object-side surface S17 of lens L7 is concave at the optical axis, and the image-side surface S18 is concave at the optical axis.

[0389] Table 8-1 shows the optical parameters of the lens assembly provided in Embodiment 8; Table 8-2 shows the aspherical coefficient of the lens assembly provided in Embodiment 8; Table 8-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Embodiment 8; Table 8-4 shows the parameter relationships of each element in the lens assembly provided in Embodiment 8.

[0390] In some embodiments, the optical parameters of each element in the lens assembly can be set according to the data shown in Tables 8-1, 8-2, 8-3 and 8-4.

[0391] Table 8-1 Optical parameters of the lens assembly provided in Example 8

[0392]

[0393] Table 8-2 Aspheric coefficients of the lens assembly provided in Example 8

[0394]

[0395]

[0396] Table 8-3 Relevant data of the GA unit and GO unit in the lens assembly provided in Example 8

[0397] Parameter name Parameter value FGA (GA unit focal length, mm) 36.85 TGA (GA unit thickness, mm) 9.300 DGA (AF stroke, mm) 3.05 FGO (GO unit focal length, mm) 67.52 TGO (GO unit thickness, mm) 8.300 DGO (OIS translation amount, mm) 0.674 OA (OIS angle, °) 0.5

[0398] Table 8-4 shows the parameter relationships of each component in the lens assembly provided in Example 8.

[0399] Conditional expression Value F#<4.5 3.50 0.65<TGA / EPD<1.0 0.68 0.6<TGO / EPD<1.0 0.61 0.7<|FGA / F|<1.2 0.77 1.0<|FGO / F|<1.6 1.41 2.5<DGA<3.5 3.05 1.0<|DGO / OA|<1.4 1.35 0.6<L / F<0.9 0.66 2<W / EPD<2.8 2.68

[0400] In Example 8, referring to Table 8-1, the effective focal length of the lens assembly is F = 47.95mm, the aperture number is F# = 3.5, the field of view (FOV) is 8.4°, and the entrance pupil diameter (EPD) is 13.7mm.

[0401] Filters 500, GP1, GO and GA can be made of glass or plastic, as detailed in Table 8-1.

[0402] The object surface, S1 to S20, and the image surface are of spherical or aspherical type, wherein the aspherical coefficient can be calculated based on the aspherical curve equation of the foregoing embodiment.

[0403] Refer to Table 8-2, which presents the aspherical coefficients of surfaces S2, S7, S8, S11 to S18 using aspherical types. Here, K is the conical coefficient in the aspherical curve equation, and A4, A6, ... A30 are the 4th to 30th order aspherical coefficients of each surface, corresponding to a1, a2, ... a30 in the aspherical curve equation, respectively. 13 .

[0404] Referring to Table 8-3, the focal length of the GA unit is FGA = 36.85mm, the total thickness of the GA unit is TGA = 9.3mm, the focus travel distance of the GA unit is DGA = 3.05mm, the focal length of the GO unit is FGO = 67.52mm, the total thickness of the GO unit is TGO = 8.3mm, the image stabilization translation amount of the GO unit is DGO = 0.674mm, and the image stabilization angle is OA = 0.5°.

[0405] Wherein, the total thickness TGA of the GA unit is the distance between the object side surface S11 of lens L4 and the image side surface S18 of lens L7, and the total thickness TGO of the GO unit is the distance between the object side surface S4 of lens L1 and the image side surface S8 of lens L3.

[0406] Refer to Table 8-4, which presents the parameter relationships of each component in the lens assembly. Specifically, the aperture value F# of the lens assembly is 3.5; the relationship between the total thickness TGA of the focusing unit GA and the entrance pupil diameter EPD is TGA / EPD = 0.68; the relationship between the total thickness TGO of the image stabilization unit GO and the entrance pupil diameter EPD is TGO / EPD = 0.61; the relationship between the focal length FGA of the focusing unit GA and the effective focal length F of the lens assembly is |FGA / F| = 0.77; the relationship between the focal length FGO of the image stabilization unit GO and the effective focal length F of the lens assembly is |FGO / F| = 1.41; the focusing travel distance DGA of the focusing unit GA is 3.05; the relationship between the image stabilization angle OA and the image stabilization travel DGO of the image stabilization unit GO is |DGO / OA| = 1.35; the relationship between the length L of the lens assembly and the effective focal length F is L / F = 0.66; and the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD = 2.68.

[0407] Figure 23 These are the field curvature and distortion diagrams of the lens assembly provided in Embodiment 8 of this application. Among them, Figure 23 (a) is a field curvature diagram of the lens assembly provided in Embodiment 8 of this application. Figure 23 The solid line in (a) represents the meridional curve. Figure 23 The dashed line in (a) represents the sagittal field curve; Figure 23 (b) is a distortion diagram of the lens assembly provided in Embodiment 8 of this application.

[0408] Depend on Figure 23 As shown in the field curvature diagram (a), both the sagittal and meridional field curvatures are controlled within a small range, reflecting good control over the curvature of the imaging plane. Figure 23 As shown in the distortion diagram in Figure (b), the lens assembly provided in Embodiment 8 has less distortion, which means that the image deformation caused by the main beam is smaller and the imaging distortion effect is lower.

[0409] Therefore, the lens assembly provided in Embodiment 8 can achieve the goals of telephoto characteristics, miniaturization, compact structure and high image quality, while ensuring sufficient weight reduction of the focusing unit GA and the image stabilization unit GO.

[0410] This application also provides a camera module, including: a lens barrel, a focusing motor, a stabilization motor, an image sensor, a circuit board, and at least one lens assembly provided in any of the foregoing embodiments, etc. The structure of the camera module is not shown in the figure.

[0411] The focusing motor is mounted outside the focusing unit 300. The focusing motor is used to adjust the position of the focusing unit 300 to achieve focusing for shooting objects at different distances. The image stabilization motor is mounted outside the image stabilization unit 400. The image stabilization motor is used to adjust the position of the image stabilization unit 400 to prevent the image from being blurred due to factors such as user hand tremors.

[0412] The image sensor is located on a circuit board and is electrically connected to the circuit board via metal wires. The lens barrel is fitted over the lens assembly, focusing motor, and image stabilization motor, and fastened to the image sensor, positioning the image sensor on the image side of the lens assembly. A light filter 500 is located between the lens assembly and the image sensor. The filter 500 is configured to receive light emitted from the lens assembly, filter it, and then transmit it to the light-receiving surface of the image sensor, which serves as the imaging surface. The image sensor is located on the light-emitting side of the filter 500 and is configured to perform photoelectric conversion on the light processed by the filter 500 for image formation.

[0413] For example, an image sensor may be a metal-oxide-semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor, etc.

[0414] When photographing an object, light enters the lens assembly from the light-incident side, where the lens assembly converges the light. After passing through the aperture, the light is reflected at the first optical path adjustment unit 100, changing its path and then passing through the image stabilization unit 400 before reaching the second optical path adjustment unit 200. The light undergoes two reflections at the second optical path adjustment unit 200, again changing its path before entering the zoom unit 300. The light then passes through the zoom unit 300 and enters the filter 500, where excess light waves are filtered out, finally converging on the light-receiving surface (image plane S0) of the image sensor. The image sensor utilizes the photoelectric conversion function of photoelectric devices to convert the light image on its light-receiving surface into an electrical signal proportional to the light image, thus forming an image.

[0415] The camera module provided in this application embodiment, by reasonably setting the optical parameters of each component in the lens assembly, can not only reduce the requirements for the drive stroke and accuracy of the focusing motor and the image stabilization motor, ensuring the lightweight of the focusing unit 300 and the image stabilization unit 400; it can also achieve telephoto characteristics and improve image quality; at the same time, the small size of the lens assembly can reduce the size of the camera module, thereby reducing the internal space occupied by the electronic device and realizing the development of thinner and lighter electronic devices.

[0416] Figure 24 This is a schematic diagram of the structure of the camera module located inside an electronic device according to an embodiment of this application.

[0417] Combination Figure 1 and Figure 24 This application also provides an electronic device, including: a display screen 10, a mid-frame 20, a back cover 30, and a camera module 50 provided in the aforementioned embodiments.

[0418] The display screen 10 and the back cover 30 are located on opposite sides of the middle frame 20. The display screen 10, the middle frame 20, and the back cover 30 are sequentially fastened together to form the overall cavity. The overall cavity includes components such as a communication module, circuit board, battery, speaker assembly, and camera module, which are not listed here.

[0419] The back cover 30 includes a light-transmitting hole 31, the camera module is fixed on the middle frame, and the lens assembly is opposite to the light-transmitting hole. The first light path adjustment unit 100 in the lens assembly is adjacent to the back cover 30.

[0420] The electronic device provided in this application includes a camera module. The camera module is small in size, which reduces its footprint within the electronic device, contributing to its slimmer and lighter design. Furthermore, the camera module offers high image quality, improving the imaging performance of the electronic device.

[0421] It should be noted that those skilled in the art, upon considering the specification and practicing the application disclosed herein, will readily conceive of other embodiments of this application. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope of this application is indicated by the following claims.

[0422] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A lens assembly, characterized in that, include: The first optical path adjustment unit (100) is configured to control the propagation of the first light ray from the object side along a first direction; The second optical path adjustment unit (200) is located on the light-emitting side of the first optical path adjustment unit (100); the second optical path adjustment unit (200) is configured to control the first light ray to propagate to the image side along a second direction, the second direction being different from the first direction; A focusing unit (300) is located along the optical path of the first light ray, and the focusing unit (300) is configured to move along the optical axis of the lens assembly to perform optical focusing; An image stabilization unit (400) is located along the optical path of the first light ray, and the image stabilization unit (400) is configured to move in a direction perpendicular to the optical axis to perform optical image stabilization; Along the first direction, the lens assembly has a length L; The length L and the effective focal length F of the lens assembly satisfy: 0.6 <L / F <0.9。 2. The lens assembly according to claim 1, characterized in that, The focal length FGA of the focusing unit (300) and the effective focal length F of the lens assembly satisfy the condition: 0.7 < |FGA / F| < 1.

2.

3. The lens assembly according to claim 1, characterized in that, The focal length FGO of the image stabilization unit (400) and the effective focal length F of the lens assembly satisfy: 1.0 < |FGO / F| < 1.

6.

4. The lens assembly according to claim 1, characterized in that, The aperture value F# of the lens assembly satisfies: F# < 4.

5.

5. The lens assembly according to claim 1, characterized in that, The total thickness TGA of the focusing unit (300) and the entrance pupil diameter EPD of the lens assembly satisfy the following condition: 0.65 <TGA / EPD<1.0。 6. The lens assembly according to claim 1, characterized in that, The total thickness TGO of the image stabilization unit (400) and the entrance pupil diameter EPD of the lens assembly satisfy the following condition: 0.6 <TGO / EPD<1.0。 7. The lens assembly according to claim 1, characterized in that, The focusing travel distance (DGA) of the focusing unit (300) satisfies: 2.5mm. <DGA<3.5mm。 8. The lens assembly according to claim 1, characterized in that, The stabilization angle OA and stabilization stroke DGO of the stabilization unit (400) satisfy: 1.0 < |DGO / OA| < 1.

4.

9. The lens assembly according to claim 1, characterized in that, Along the second direction, the lens assembly has a width W; The width W and the entrance pupil diameter EPD of the lens assembly satisfy: 2 <W / EPD<2.8。 10. The lens assembly according to claim 1, characterized in that, The focusing unit (300) includes multiple lenses, which are sequentially distributed along the optical path of the first light ray; The image stabilization unit (400) includes multiple lenses, which are sequentially distributed along the optical path of the first light ray.

11. The lens assembly according to claim 10, characterized in that, The focusing unit (300) is located on the optical path of the first light ray along the first direction, and the image stabilization unit (400) is located on the optical path of the first light ray along the second direction; or, The focusing unit (300) is located on the optical path of the first light ray along the second direction, and the image stabilization unit (400) is located on the optical path of the first light ray along the first direction.

12. The lens assembly according to claim 1, characterized in that, The first optical path adjustment unit (100) includes a first reflective surface (101); The first reflective surface (101) is configured to receive the first light from the object side and reflect the first light to control the propagation of the first light along a first direction, which is different from the incident direction of the first light.

13. The lens assembly according to claim 1, characterized in that, The second optical path adjustment unit (200) includes a second reflective surface (201) and a third reflective surface (202), the second reflective surface (201) facing the first optical path adjustment unit (100), and the third reflective surface (202) facing the image side; The second reflective surface (201) is configured to receive the first light ray propagating along the first direction and to reflect the first light ray for the first time, so as to control the propagation of the first light ray to the third reflective surface (202). The third reflecting surface (202) is configured to reflect the first light ray after the first reflection a second time, so as to control the first light ray to propagate to the image side along the second direction.

14. A camera module, characterized in that, include: A filter, an image sensor, and a lens assembly as described in any one of claims 1-13; The filter is located on the light-emitting side of the lens assembly, and the filter is configured to receive light emitted by the lens assembly; The image sensor is located on the light-emitting side of the filter, and the image sensor is configured to perform photoelectric conversion on the light processed by the filter, and then use it for imaging.

15. An electronic device, characterized in that, include: The display screen, the mid-frame, the back cover, and the camera module as described in claim 14; The display screen and the rear shell are located on opposite sides of the middle frame; The rear cover includes a light-transmitting hole, the camera module is fixed on the mid-frame, and the lens assembly is opposite to the light-transmitting hole.

Images