Lens assembly, camera module and electronic equipment

Abstract

The invention discloses a lens assembly, a camera module and electronic equipment. In the lens assembly, a first light path adjusting unit is configured to control first light from an object side to propagate along a first direction; the second light path adjusting unit is located on the light emitting side of the first light path adjusting unit and is configured to control the first light to be propagated to the image side in the second direction, and the second direction is different from the first direction; the focusing unit is located on a light path along the first light so as to perform optical focusing; the anti-shake unit is located on a light path along the first light to perform optical anti-shake. The compensation unit is located on a light path along the first light, and the compensation unit is configured to compensate for aberration variation caused when the focusing unit and / or the anti-shake unit moves. Through the transmission and / or reflection effects of the first light path adjusting unit and the second light path adjusting unit, the propagation path of the light can be changed. Therefore, the ultra-long focal length can be realized, the size of the lens assembly can be reduced, and the imaging quality can be improved.

Description

Technical Field

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

[0002] As the imaging requirements of electronic devices become increasingly demanding, integrating telephoto lenses has become a major development trend in mobile phones, tablets, and other electronic devices to enhance their competitiveness. Telephoto lenses, with their long focal length and narrow viewing angle, are suitable for capturing distant and inaccessible objects.

[0003] However, traditional telephoto lenses usually have disadvantages such as being too long and too large in size. They will occupy too much internal space of electronic devices and cannot meet the needs of miniaturization development of electronic devices. Summary of the Invention

[0004] The present application provides a lens assembly, a camera module and an electronic device to solve the problem that the existing telephoto lens is large in size and cannot meet the miniaturization development of electronic devices.

[0005] In a first aspect, the present application provides a lens assembly comprising: a first optical path adjustment unit, a second optical path adjustment unit, a focusing unit, an anti-shake unit, and a compensation unit. The first optical path adjustment unit is configured to control a first light ray from the object side to propagate along a first direction; the second optical path adjustment unit is located on the light exit side of the first optical path adjustment unit; the second optical path adjustment unit 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; the focusing unit is located along the optical path of the first light ray, and is configured to move along the direction of the optical axis of the lens assembly to perform optical focusing; the anti-shake 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 to perform optical anti-shake; the compensation unit is located along the optical path of the first light ray, and is configured to compensate for aberration changes caused by movement of the focusing unit and / or the anti-shake unit.

[0006] The lens assembly provided in the embodiments of the present application utilizes the transmission and / or reflection effects of the first and second optical path adjustment units to change the propagation path of light. This not only achieves an ultra-long focal length, but also reduces the size of the lens assembly, making it compact and occupying less space within the electronic device, thereby meeting the trend of thinner and lighter electronic devices. Furthermore, the lens assembly has focusing, anti-shake, and compensation functions, utilizing the focusing, anti-shake, and compensation units to process the first light to improve imaging quality.

[0007] In some implementations, the focal length FGA of the focusing unit and the effective focal length F of the lens assembly satisfy: 0.4 < |FGA / F| < 2.0. In this way, by restricting the effective focal length of the lens assembly, the lens assembly has an ultra-long focal length. Moreover, through the 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 as the leading 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 and imaging quality of the lens assembly.

[0008] In some implementations, the focal length FGO of the anti-shake unit and the effective focal length F of the lens assembly satisfy: 0.5 < |FGO / F| < 1.6. In this way, through 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 shake, and at the same time ensure a better balance between the size and imaging quality of the lens assembly.

[0009] In some implementations, the focal length FGC of the compensation unit and the effective focal length F of the lens assembly satisfy: 0.4 < |FGC / F| < 5.0.

[0010] In some implementations, the aperture value F# of the lens assembly satisfies: F# ≤ 4. 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.

[0011] In some implementations, the total thickness TGA of the focusing unit and the entrance pupil diameter EPD of the lens assembly satisfy: 0.15 < TGA / EPD < 0.5. 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, and the structural size of the telephoto lens assembly can be prevented from being too large; at the same time, ensuring a smaller total thickness of the focusing unit can reduce the requirements for the motor stroke and accuracy. In this way, the requirements for small size and compact structure of the portable electronic device can be better met.

[0012] In some implementations, the total thickness TGO of the anti-shake unit and the entrance pupil diameter EPD of the lens assembly satisfy: 0.15 < TGO / EPD < 0.6. 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, and the structural size of the telephoto lens assembly can be prevented from being too large; at the same time, ensuring a smaller total thickness of the anti-shake unit can reduce the requirements for the motor stroke and accuracy. In this way, the requirements for small size and compact structure of the portable electronic device can be better met.

[0013] In some implementations, the focusing movement stroke DGA of the focusing unit and the effective focal length F of the lens assembly satisfy: 0.55 < DGA / F^2 × 1000 < 1.05. In this way, it is beneficial to reasonably allocate the movement stroke of the driving motor while ensuring that the motor has good focusing accuracy.

[0014] In some implementations, the anti-shake angle OA and the anti-shake stroke DGO of the anti-shake unit satisfy: 0.8 < |DGO / OA| < 1.5. In this way, it is beneficial to reduce the movement stroke of the driving motor while ensuring a sufficiently large anti-shake angle, thereby compressing the volume of the anti-shake unit and ensuring that the telephoto lens assembly has good optical performance while achieving miniaturization in structure.

[0015] 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: 0.7 < L / F < 1. 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.

[0016] 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: 1.5 < W / EPD < 3. 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 equipped with it can meet the requirements of small size and compact structure.

[0017] 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; the compensation unit includes multiple lenses, and the multiple lenses of the compensation unit are sequentially distributed along the optical path of the first light ray. In this way, the focusing unit, the anti-shake unit, and the compensation unit are all implemented by independent lens groups. When the lens assembly needs to perform focusing, only a group of lenses is needed 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 lightweight. And 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 perform anti-shake, only a group of lenses is needed 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, fully achieving lightweight. When the lens assembly performs optical compensation,

[0018] In some implementations, the first optical path adjustment unit includes a first reflective surface configured to receive a first light ray from the object side and reflect the first light ray to control the first light ray to propagate in 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 the propagation direction of the first light ray, 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, with the second reflective surface facing the first optical path adjustment unit and the third reflective surface facing the image side. The second reflective surface is configured to receive a first light ray propagating in a first direction and perform a first reflection on the first light ray to control the first light ray to propagate toward 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 first light ray to propagate toward the image side in a second direction. In this way, the first light ray can be reflected twice by the second reflective surface and the third reflective surface to perform optical path adjustment again, thereby 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] In a second aspect, the present application provides a camera module comprising: a filter, an image sensor, and a lens assembly as provided in the first aspect; 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 for imaging.

[0021] The camera module provided in the embodiment of the present application reasonably sets the optical parameters of each component in the lens assembly, which not only reduces the requirements for the driving stroke and accuracy of the focus motor and the anti-shake motor, ensuring the lightweight of the focus unit and the anti-shake unit; it can also achieve telephoto characteristics and improve imaging 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 lightweight development of the electronic device.

[0022] In a third aspect, the present application provides an electronic device comprising: a display screen, a middle frame, a back cover, and a camera module as provided in the second aspect; the display screen and the back cover are located on opposite sides of the middle frame; the back cover includes a light-transmitting hole, the camera module is fixed on the middle frame, and the lens assembly is opposite to the light-transmitting hole.

[0023] The electronic device provided in the embodiments of the present application includes a camera module. The camera module is small in size, which can reduce the internal space occupied by the electronic device, thereby achieving the development of lightweight and thin electronic devices. In addition, the camera module has high imaging quality, which can improve the imaging performance of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 is a structural diagram of an electronic device provided in an embodiment of the present application;

[0026] Figure 2 is a rear view of the electronic device provided by an embodiment of the present application;

[0027] Figure 3 is a stereoscopic diagram of a lens assembly provided in an embodiment of the present application;

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

[0029] Figure 5 2 is a second optical axis schematic diagram of the lens assembly provided in an embodiment of the present application;

[0030] Figure 6 2 is a third optical axis schematic diagram of the lens assembly provided in an embodiment of the present application;

[0031] Figure 7 Schematic diagram of the optical path of the lens assembly provided in an embodiment of the present application;

[0032] Figure 8 1 is a schematic structural diagram of a lens assembly provided in Example 1 of the present application;

[0033] Figure 9 1 is a field curvature diagram and a distortion diagram of the lens assembly provided in Example 1 of the present application;

[0034] Figure 10 Schematic diagram of the structure of the lens assembly provided in Example 2 of the present application;

[0035] Figure 11 1 is a field curvature diagram and a distortion diagram of the lens assembly provided in Example 2 of the present application;

[0036] Figure 12 This is a schematic structural diagram of the lens assembly provided in Example 3 of the present application;

[0037] Figure 13 1 is a field curvature diagram and a distortion diagram of the lens assembly provided in Example 3 of the present application;

[0038] Figure 14 1 is a schematic structural diagram of a lens assembly provided in Example 4 of the present application;

[0039] Figure 15 1 is a field curvature diagram and a distortion diagram of the lens assembly provided in Example 4 of the present application;

[0040] Figure 16 1 is a schematic structural diagram of a lens assembly provided in Example 5 of the present application;

[0041] Figure 17 1 is a field curvature diagram and a distortion diagram of the lens assembly provided in Example 5 of the present application;

[0042] Figure 18 1 is a structural diagram of a lens assembly provided in Example 6 of the present application;

[0043] Figure 19 1 is a field curvature diagram and a distortion diagram of the lens assembly provided in Example 6 of the present application;

[0044] Figure 20 1 is a schematic structural diagram of a lens assembly provided in Example 7 of the present application;

[0045] Figure 21 1 is a field curvature diagram and a distortion diagram of the lens assembly provided in Example 7 of the present application;

[0046] Figure 22 1 is a structural diagram of a lens assembly provided in Example 8 of the present application;

[0047] Figure 23 1 is a field curvature diagram and a distortion diagram of the lens assembly provided in Example 8 of the present application;

[0048] Figure 24 This is a structural diagram of a camera module provided in an embodiment of the present application located in an electronic device.

[0049] Illustration:

[0050] 10-display screen, 20-middle frame, 30-back shell, 31-light hole, 40-camera assembly, 50-camera module, 100-first optical path adjustment unit, 101-first reflection surface, 102-first light incident surface, 103-first light exit surface, 200-second optical path adjustment unit, 201-second reflection surface, 202-third reflection surface, 203-second light incident surface, 204-second light exit surface, 300-focusing unit, 301-first lens, 302-second lens, 400-anti-shake unit, 401-third lens, 402-fourth lens, 500-compensation unit, 501-fifth lens, 502-sixth lens, 600-filter. DETAILED DESCRIPTION

[0051] The following will clearly describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, other embodiments obtained by ordinary technicians in this field without making any creative work are all within the scope of protection 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 understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first," "second," etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0053] In addition, in this application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative descriptions and clarifications, and they can change accordingly according to changes in the orientation of the components in the drawings.

[0054] The following explains the professional terms mentioned in the embodiments of the present application to facilitate understanding by those skilled in the art.

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

[0056] The optical axis is the axis passing through the center of each lens of the lens.

[0057] Focus: When light parallel to the optical axis enters a convex lens, the ideal convex lens should be one in which all the light converges at a point behind the lens. This point where all the light converges is the focus.

[0058] Focal length, also known as focal length, is a measure of the convergence or divergence of light in optical lenses. It refers to the vertical distance from the optical center of a lens or lens group to the focal plane, when an object at infinite distance is formed through the lens or lens group. From a practical perspective, it can be understood as the distance from the center of the lens to the focal plane when the object is at infinite distance. For fixed-focus lenses, the position of the optical center is fixed; for telephoto lenses, changes in the 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, with the lens assembly as the boundary, the side where the object is located is the object side, and the side of the lens facing the object side is the object side of the lens.

[0061] The image side is the side where the image of the object is located, and the side of the lens facing the image side is the image side.

[0062] The aperture (aperture diaphragm) is a device used to control the amount of light passing through the lens and entering the photosensitive surface inside the camera body. It is usually inside the lens.

[0063] Aperture, also known as F-number (FNO), is a relative value calculated by dividing the focal length of a lens by the diameter of its entrance pupil (the inverse of the relative aperture). The smaller the aperture, the more light enters per unit time. A larger aperture reduces the depth of field, blurring the background in photos, similar to the effect of a telephoto lens.

[0064] The entrance pupil diameter (EPD), also known as the entrance pupil diameter, 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 side to the imaging surface. TTL is the main factor affecting the height of the camera.

[0066] The imaging plane is located on the image side of all lenses in the optical lens, and is the plane on which the image is formed after the light passes through each lens in the optical lens in sequence.

[0067] The Abbe number (Abbe), also known as the dispersion coefficient, is the difference ratio of the refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material.

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

[0069] Aberration: An optical lens has the properties of an ideal optical system at the optical axis. The near-axis light emitted from a point on the object intersects the image plane at a point (also known as the optical axis image point). However, the light rays that actually pass through the lens with different apertures are unlikely to intersect perfectly at a point, but instead have a certain deviation from the position of the near-axis image point. These differences are collectively called aberrations.

[0070] Distortion, also known as distortion, refers to the degree to which the image formed by an optical lens is distorted relative to the object itself. Distortion is caused by spherical aberration. The height at which the chief rays of light from different fields of view intersect the Gaussian image plane after passing through the optical lens is not equal to the ideal image height. The difference between the two is the distortion. Therefore, distortion only changes the image position of off-axis object points on the ideal plane, distorting the image shape but not affecting image clarity.

[0071] Astigmatism occurs when the object point is not on the optical axis of an optical lens. The resulting beam is tilted at an angle to the optical axis. After refraction through the lens, the convergence points of the meridional and sagittal beamlets are not aligned. This means the beam cannot be focused to a single point, resulting in an unclear image. This is known as astigmatism. Meridional and sagittal beamlets are the names for beams in two perpendicular planes within a rotationally symmetric optical lens.

[0072] The meridian plane refers to the plane formed by the chief ray (chief light beam) of an object point outside the optical axis and the optical axis.

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

[0074] Field curvature describes the difference in the optical axis between the sharpest image point of non-central field rays and the sharpest image point of the central field rays after passing through an optical lens system. When a lens exhibits field curvature, the intersection of the entire light 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 the embodiments of the present application include but are not limited to mobile phones, notebook computers, tablet computers, laptop computers, personal digital assistants, or wearable devices, etc. The following description will be made using a mobile phone as the electronic device.

[0076] Figure 1 is a structural diagram of an electronic device provided in an embodiment of the present application; Figure 2 This is a rear view of the electronic device provided in an embodiment of the present application.

[0077] like Figure 1 and Figure 2 As shown, the electronic device may include a display screen 10, a middle frame 20, and a rear housing 30. The display screen 10 and the rear housing 30 are located on opposite sides of the middle frame 20. The display screen 10, the middle frame 20, and the rear housing 30 are sequentially fastened together to form a complete housing. The housing 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 a shooting function for the electronic device. The camera assembly 40 can be used as both a front camera and a rear camera.

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

[0080] To facilitate the explanation of the positions of various components in an electronic device, an embodiment of the present application 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, optical filters, an image sensor, and an image processor, all of which are not shown in the figure. The image sensor is located on the image side of the lens, the optical filters are located between the lens and the image sensor, and the image processor is located within the camera body and coupled to the circuit board.

[0082] The light reflected by the object can generate an optical image through the lens and projected onto the image sensor. The image sensor converts the optical image into an electrical signal, and transmits the electrical signal to the image processor for processing, and finally displays the image of the object through the display screen 10.

[0083] To enhance the imaging capabilities of electronic devices, the camera assembly 40 typically incorporates a telephoto lens to enhance user experience. A telephoto lens has a long focal length and a narrow viewing angle, capturing a relatively small spatial range of objects. However, at the same shooting distance, it can produce a larger image than a standard lens. Therefore, a telephoto lens is suitable for capturing distant objects and difficult-to-access scenes.

[0084] While miniaturization of electronic devices is a current technological trend, traditional telephoto lenses often suffer from drawbacks such as excessive length, poor image quality, or excessive size. These lenses also occupy a large space and fail to meet the demands of current technological developments. Furthermore, the optical properties of telephoto lenses are limited by the thickness of electronic devices, limiting the imaging effects of these devices, such as background blur and object magnification.

[0085] Furthermore, when shooting macro shots with a conventional telephoto lens, the entire lens must be moved for focusing. This movement results in a long travel and insufficient lightweighting, necessitating the use of an additional long-stroke drive motor to drive the lens. However, this further increases the space occupied by the telephoto lens and reduces focusing capability. Furthermore, it is difficult to suppress fluctuations in various aberrations, including spherical aberration, when focusing from an object at infinity to a close object, resulting in poor shooting results.

[0086] In the prior art, telephoto lenses usually achieve optical image stabilization by driving the rotation of a prism in front of the entire lens. However, the lightness of the image stabilization unit is insufficient and the requirements for the motor are relatively high.

[0087] It can be seen that how to make a telephoto lens that can take into account miniaturization, compact structure, ultra-long focal length and high image quality while fully ensuring the lightweight of the focusing component and anti-shake component has become a problem that needs to be solved urgently.

[0088] In order to solve the above technical problems, an embodiment of the present application provides a lens assembly, which has a compact structure, can reduce the internal space occupied by the electronic device, can achieve ultra-long focal length and high imaging quality, and can fully ensure the lightweight focusing and anti-shake.

[0089] Figure 3 It is a stereoscopic diagram of the lens assembly provided in an embodiment of the present 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 , an anti-shake unit 400 and a compensation unit 500 .

[0091] The first optical path adjustment unit 100 and the second optical path adjustment unit 200 are both configured to change the optical path of light. The focus unit 300 is configured to move along the optical axis of the lens assembly to perform optical focusing. The anti-shake unit 400 is configured to move perpendicular to the optical axis to perform optical image stabilization. The compensation unit 500 is configured to compensate for aberration changes caused by the movement of the focus unit 300 and / or the anti-shake unit 400.

[0092] Figure 4 This is a first optical axis diagram of the lens assembly provided in the embodiment of the present 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 close to the object side, and the first optical path adjustment unit 100 is configured to control the first light from the object side to propagate 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) in the lens assembly by reflection, so that the first light 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 reflective mirror assembly, an assembly composed of a lens group and a reflector or prism, a total reflection optical fiber, or other optical structures, as long as they can achieve the same optical path adjustment function, and the embodiments of the present application are not specifically limited. If the first optical path adjustment unit 100 is a prism, the object-side surface or image-side surface of the first optical path adjustment unit 100 can be a flat surface, a spherical surface, an aspherical surface, or a free-form surface.

[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 emitting surface 103. The first reflective surface 101 is connected between the first light incident surface 102 and the first light emitting surface 103. The first light incident surface 102 faces the object side and is perpendicular to the z-axis; the first light emitting surface 103 faces the image side and is perpendicular to the x-axis.

[0097] The first reflective surface 101 is tilted relative to the optical axis and faces the object side and the first direction D1 to reflect incident light from the object side toward the first direction D1. For example, the first reflective surface 101 can be tilted 45 degrees.

[0098] The first light incident surface 102 receives the first light from the object side, and the first light enters the first optical path adjustment unit 100 through the first light incident surface 102. The first reflective surface 101 is configured to receive the first light from the object side and reflect the first light to control the first light to propagate along a first direction D1, which is different from the incident direction D0 of the first light. The first reflective surface 101 reflects the first light entering through the first light incident surface 102 so that the first light is emitted from the first light emitting 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, thereby changing the propagation direction of the first light, thereby reducing the size of the lens assembly along the incident direction D0.

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

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

[0102] The second light path adjustment unit 200 can achieve the purpose of light path redirection by transmitting and / or reflecting the light path, so that the first light 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 reflective mirror assembly, an assembly composed of a lens group and a reflector or prism, a total reflection optical fiber, or other optical structures, as long as they can achieve the same optical path adjustment function, and the embodiments of the present application are not specifically limited. If the second optical path adjustment unit 200 is a prism, the object-side surface or image-side surface of the second optical path adjustment unit 200 can be a flat surface, a spherical surface, an aspherical surface, or a free-form surface.

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

[0105] The second reflective surface 201 is configured to receive a first light beam propagating along the first direction D1 and perform a first reflection on the first light beam to control the first light beam to propagate to the third reflective surface 202. The third reflective surface 202 is configured to perform a second reflection on the first light beam after the first reflection to control the first light beam to propagate along the second direction D2 to the image side.

[0106] The first light emitted from the first light path adjustment unit 100 enters the second light path adjustment unit 200 through the second light incident surface 203, is reflected on the second reflection surface 201 and the third reflection surface 202 in sequence, and is emitted from the second light emitting surface 204 along the second direction D2 to the image side.

[0107] In this way, the second reflective surface 201 and the third reflective surface 202 can be used to reflect the first light twice to adjust the optical path again, thereby changing the optical path of the first light from the first direction D1 to 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 have a polygonal structure. Exemplarily, the second optical path adjustment unit 200 has a pentagonal structure. The second reflective surface 201 is located adjacent to the image side and faces the first optical path adjustment unit 100. The third reflective surface 202 is located between the first optical path adjustment unit 100 and the second reflective surface 201 and faces the image side. The present embodiment does not limit the inclination angles of the second reflective surface 201 and the third reflective surface 202; the purpose is to redirect the first light traveling along the first direction D1 to continue traveling in the second direction D2.

[0109] Since the first optical path adjustment unit 100 and the second optical path adjustment unit 200 both have an optical path adjustment function, the optical axes of the lens assembly are not in the same direction.

[0110] Combine 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 optical axis segment between the second reflective surface 201 and the third reflective surface 202 is omitted. The first optical axis segment z1 is formed between the object side and the first optical path adjustment unit 100, and is parallel to the z-axis. 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 is parallel to the x-axis. The third optical axis segment z3 is formed between the second optical path adjustment unit 200 and the image side, and is parallel to the y-axis.

[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. By 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 redirected by 90 degrees in sequence.

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

[0113] like Figure 6 As shown, in another implementation, the second optical path adjustment unit 200 can be an isosceles trapezoidal structure, with the second light incident surface 203 and the second light exit surface 204 being coplanar. The second reflective surface 201 is adjacent to the first optical path adjustment unit 100 and is tilted toward the first optical path adjustment unit 100 along the y-axis. The third reflective surface 202 is located on the side away from the second reflective surface 201 along the y-axis and is tilted toward the image side along the y-axis. The second reflective surface 201 and the third reflective surface 202 are mirror images along a direction parallel to the second optical axis segment z2. For example, the second reflective surface 201 and the third reflective surface 202 can both be tilted 45°.

[0114] In this way, the optical axis can be turned 90° at the second reflective surface 201 and transmitted to the third reflective surface 202. It can then be turned another 90° at the third reflective surface 202 and transmitted to the image side. The portion where the optical axis turns between the second reflective surface 201 and the third reflective surface 202 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 can 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, and the third optical axis segment z3 is parallel to the x-axis. The direction of the first light ray along the second optical axis segment z2 is opposite to that along the third optical axis segment z3. Thus, the optical axis can be shifted 90° using the optical path steering function of the first optical path adjustment unit 100, and 180° using the optical path steering function of the second optical path adjustment unit 200.

[0116] In the embodiment of the present application, in the lens assembly of the second optical path adjustment unit 200 adopting an isosceles trapezoidal structure, the image side is adjacent to the first optical path adjustment unit 100, so that the size of the lens assembly in the y-axis direction can be reduced.

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

[0118] For example, Figure 5 In the state shown, the focusing unit 300 can be located on the optical path of the first light along the first direction D1. In this way, 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 of the optical axis. When achieving optical focus, the focusing unit 300 moves in the direction of the second optical axis segment z2. The focusing unit 300 can also be located on the optical path of the first light 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 achieving optical focus, the focusing unit 300 moves in the direction of the third optical axis segment z3.

[0119] The focusing unit 300 includes a plurality of lenses, such as a first lens 301 and a second lens 302. The first lens 301 and the second lens 302 are sequentially distributed along the optical path of the first light, and the first lens 301 and the second lens 302 are both perpendicular to the optical axis.

[0120] Exemplarily, the first lens 301 and the second lens 302 are distributed in sequence along the optical path of the first direction D1 of the first light ray, and are both perpendicular to the second optical axis segment z2 of the optical axis; or, the first lens 301 and the second lens 302 are distributed in sequence along the optical path of the second direction D2 of the first light ray, and are both perpendicular to the third optical axis segment z3 of the optical axis.

[0121] In the embodiment of the present application, the focusing unit 300 is formed by a lens group. When the lens assembly needs to focus, only one group of lenses needs to be used to achieve focus, without using the entire lens assembly to achieve focus. This can reduce the focus stroke, improve the focusing ability, and achieve sufficient lightweight. In addition, there is no need to additionally configure a long-stroke drive motor to drive the movement of the lens assembly to reduce the volume of the lens assembly. At the same time, the use of an independent lens group to form the focusing unit 300 can suppress the changes in various aberrations, headed by spherical aberration, when focusing from an infinitely distant object to a close object, thereby improving imaging quality.

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

[0123] For example, Figure 5 In the state shown, the anti-shake unit 400 can be located on the optical path of the first light along the first direction D1. In this way, the anti-shake unit 400 is located between the first optical path adjustment unit 100 and the second optical path adjustment unit 200, and the anti-shake unit 400 is perpendicular to the second optical axis segment z2 of the optical axis. When optical image stabilization is implemented, the anti-shake unit 400 moves in a direction perpendicular to the second optical axis segment z2. The anti-shake unit 400 can also be located on the optical path of the first light along the second direction D2. In this way, the anti-shake unit 400 is located between the second optical path adjustment unit 200 and the image side, and the anti-shake unit 400 is perpendicular to the third optical axis segment z3 of the optical axis. When optical image stabilization is implemented, the anti-shake unit 400 moves in a direction perpendicular to the third optical axis segment z3.

[0124] The anti-shake unit 400 includes a plurality of lenses, such as a third lens 401 and a fourth lens 402. The third lens 401 and the fourth lens 402 are sequentially distributed along the optical path of the first light, and are both perpendicular to the optical axis.

[0125] Illustratively, the third lens 401 and the fourth lens 402 are sequentially distributed along the optical path of the first direction D1 of the first light ray, and are both perpendicular to the second optical axis segment z2 of the optical axis; alternatively, the third lens 401 and the fourth lens 402 are sequentially distributed along the optical path of the second direction D2 of the first light ray, and are both perpendicular to the third optical axis segment z3 of the optical axis.

[0126] In this embodiment of the present application, the anti-shake unit 400 is formed by a lens assembly. When the lens assembly requires anti-shake, only one set of lenses is required to achieve anti-shake, without 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 achieves a fully lightweight design. The use of an independent lens assembly to form the anti-shake unit 400 can compensate for image offset caused by tilting the lens assembly at a certain angle due to hand or body shaking when photographing an object using the lens assembly, thereby improving image quality.

[0127] In some embodiments, the compensation unit 500 is located along the optical path of the first light ray, and the compensation unit 500 is perpendicular to the optical axis of the lens assembly.

[0128] For example, Figure 5 In the state shown, the compensation unit 500 can be located on the optical path of the first light along the first direction D1, so that the compensation unit 500 is located between the first optical path adjustment unit 100 and the second optical path adjustment unit 200, and the compensation unit 500 is perpendicular to the second optical axis segment z2 of the optical axis. The compensation unit 500 can also be located on the optical path of the first light along the second direction D2, so that the compensation unit 500 is located between the second optical path adjustment unit 200 and the image side, and the compensation unit 500 is perpendicular to the third optical axis segment z3 of the optical axis.

[0129] The compensation unit 500 includes a plurality of lenses, such as a fifth lens 501 and a sixth lens 502. The fifth lens 501 and the sixth lens 502 are sequentially distributed along the optical path of the first light, and both the fifth lens 501 and the sixth lens 502 are perpendicular to the optical axis.

[0130] Exemplarily, the fifth lens 501 and the sixth lens 502 are sequentially distributed along the optical path of the first direction D1 of the first light, and are both perpendicular to the second optical axis segment z2 of the optical axis; or Figure 5 In the state shown, the fifth lens 501 and the sixth lens 502 are sequentially distributed along the optical path of the first light in the second direction D2 and are both perpendicular to the third optical axis segment z3 of the optical axis.

[0131] Multiple lenses can form a set light transmission path. After the first light enters the compensation unit 500, the first light can be transmitted along the set light transmission path to compensate for the aberration changes caused by the movement of the focusing unit 300 and / or the anti-shake unit 400, thereby improving the imaging quality.

[0132] The compensation unit 500 can move along the optical axis. For example, when the compensation unit 500 is located on the optical path of the first light along the first direction D1, the compensation unit 500 can move along the direction of the second optical axis segment z2 to achieve optical compensation.

[0133] By moving the compensation unit 500, the first light output from the first optical path adjustment unit 100 or the second optical path adjustment unit 200 can be compensated to assist the focus unit 300 in zooming and the anti-shake unit 400 in anti-shake. For example, if the first light is relatively divergent, the compensation unit 500 can focus more of the divergent light, thereby improving image quality.

[0134] It should be noted that, in order to ensure that the set light transmission path remains unchanged, the lenses in the compensation unit 500 may be moved simultaneously.

[0135] In some embodiments, the number of the compensation unit 500 is one or more, and the multiple compensation units 500 are arranged at intervals along the optical axis. The multiple compensation units 500 can be arranged on the same optical axis segment, or can be arranged on different optical axis segments. Figure 5 The lens assembly is shown to include two compensation units 500 , which are sequentially distributed along the optical path of the second direction D2 of the first light ray at intervals and are both perpendicular to the third optical axis segment z3 of the optical axis.

[0136] In this embodiment of the present application, the compensation unit 500 is formed by a lens assembly. When optical compensation is required in the lens assembly, only one set of lenses is required to achieve the compensation, which reduces the requirements for the drive motor and achieves a fully lightweight design. The compensation unit 500, formed by a separate lens assembly, can compensate for aberration changes caused by the movement of the focus unit 300 and / or the anti-shake unit 400 when photographing an object using the lens assembly, thereby improving image quality.

[0137] In some embodiments, the focusing unit 300, the anti-shake unit 400, and the compensation unit 500 are each implemented by an independent lens group. 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 multiple lenses can be glued or non-glued to form a lens group. For example, when gluing a lens group, each lens must be made of glass.

[0138] The object side surface or image side surface of the lens can be a plane, a concave surface, a convex surface, etc. In one implementation, the surface shapes of the relative object side surfaces and image side surfaces of two adjacent lenses can be adapted to achieve seamless bonding of the two adjacent lenses, or to set them at intervals. Exemplarily, in the focusing unit 300, the image side surface of the first lens 301 is a concave surface, and the object side surface of the second lens 302 is a convex surface, so that seamless bonding of the first lens 301 and the second lens 302 can be achieved. In this scenario, the image side surface of the first lens 301 and the object side surface of the second lens 302 share a common surface. In the anti-shake unit 400, the image side surface of the third lens 401 is a convex surface, and the object side surface of the fourth lens 402 is a concave surface. The curvature of the image side surface of the third lens 401 and the object side surface of the fourth lens 402 are different, so that there can be a gap between the image side surface of the third lens 401 and the object side surface of the fourth lens 402.

[0139] In another implementation, the object-side and image-side surfaces of two adjacent lenses may have the same surface 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 may both be flat, convex, or concave, thereby creating a gap between the two adjacent lenses. For example, along the optical axis, the image-side surface of the left lens is convex, and the object-side surface of the right lens is convex, such that the left and right lenses only contact at the optical axis, with a gap remaining between them.

[0140] In some embodiments, the lenses of the focusing unit 300 , the anti-shake unit 400 , and the compensation unit 500 may be either aspherical lenses or spherical lenses, which is not limited in the embodiments of the present application.

[0141] Aspherical lenses are lenses whose curved surfaces are not uniform, but rather composed of multiple surfaces. This effectively compensates for spherical and distorted aberrations, further contributing to the wide aperture performance of the lens assembly while also reducing the overall length of the lens assembly.

[0142] Exemplarily, the aspheric surface shape of each lens can be defined using, but not limited to, the following aspheric curve equation:

[0143]

[0144] Where z is the depth of the aspheric surface; c is the curvature of the aspheric vertex, c = 1 / R, R is the radius of curvature of the lens surface; k is the cone coefficient; is the radial distance (mirror center height); r n is the normalized radius, u=r / r n ;a m is the mth order Q con Coefficient (aspheric coefficient), Q m conis the mth order Q con Polynomial.

[0145] In this way, by using lenses with different surface shapes, the lens assembly can better converge light and achieve the effect of increasing the aperture.

[0146] In some embodiments, the embodiments of the present application do not limit the relative positions of the anti-shake unit 400, the focus unit 300 and the compensation unit 500. It is only necessary that the three are located on the optical path of the first light and perpendicular to the optical axis.

[0147] In the first implementation, Figure 5 In the state shown, the focusing unit 300 and the anti-shake unit 400 are both located on the optical path of the first light along the first direction D1, and the compensation unit 500 is located on the optical path of the first light along the second direction D2. In other words, the focusing unit 300 and the anti-shake unit 400 are both located between the first optical path adjustment unit 100 and the second optical path adjustment unit 200, and the compensation unit 500 is located between the second optical path adjustment unit 200 and the image side. The present application does not limit the relative positions of the focusing unit 300 and the anti-shake unit 400; there is a gap between them along the first direction D1. For example, the focusing unit 300 can be adjacent to the first optical path adjustment unit 100, and the anti-shake unit 400 can be adjacent to the second optical path adjustment unit 200, or vice versa.

[0148] In a second implementation, the anti-shake unit 400 and the compensation unit 500 are located on the optical path of the first light along the first direction D1, and the focus unit 300 is located on the optical path of the first light along the second direction D2. In other words, the anti-shake unit 400 and the compensation unit 500 are located between the first optical path adjustment unit 100 and the second optical path adjustment unit 200, and the focus unit 300 is located between the second optical path adjustment unit 200 and the image side.

[0149] In a third implementation, the focusing unit 300 and the compensation unit 500 are both located on the optical path of the first light along the first direction D1, and the anti-shake unit 400 is located on the optical path of the first light along the second direction D2. That is, the focusing unit 300 and the compensation unit 500 are both located between the first optical path adjustment unit 100 and the second optical path adjustment unit 200, and the anti-shake unit 400 is located between the second optical path adjustment unit 200 and the image side. The present application does not limit the order of the focusing unit 300 and the compensation unit 500; there is a gap between them along the first direction D1. For example, the focusing unit 300 can be adjacent to the first optical path adjustment unit 100, and the compensation unit 500 can be adjacent to the second optical path adjustment unit 200, or vice versa.

[0150] In a fourth implementation, the focusing unit 300, the anti-shake unit 400, and the compensation unit 500 are all located on the optical path of the first light along the second direction D2. That is, the focusing unit 300, the anti-shake unit 400, and the compensation unit 500 are all located between the second optical path adjustment unit 200 and the image side. The order of the focusing unit 300, the anti-shake unit 400, and the compensation unit 500 is not limited, and there is a gap between them along the second direction D2.

[0151] It should be noted that the anti-shake unit 400, the focus unit 300 and the compensation unit 500 may also be arranged in other ways, which are not listed one by one in the embodiments of the present application.

[0152] In the embodiment of the present application, the anti-shake unit 400, the focus unit 300 and the compensation unit 500 are arranged in different ways to form lens assemblies with different sizes and shapes, so that the lens assembly has a compact structure and a small volume to achieve miniaturization.

[0153] See again Figure 5 In some embodiments, the lens assembly may further include an aperture (not shown) and a filter 600. The aperture may be an element that constrains and limits the incident light, thereby limiting the magnitude of the incident light and controlling the depth of field. The aperture is located closest to the object side and is located at the front end of the first optical path adjustment unit 100. Thus, the incident light must first pass through the aperture before entering the lens assembly.

[0154] Exemplarily, the diaphragm may be an aperture diaphragm, the shape of the effective light opening of the diaphragm may be circular, the surface of the effective light opening of the diaphragm may be perpendicular to the first optical axis segment z1 of the optical axis of the lens assembly, and the center of the effective light opening of the diaphragm may be located on the first optical axis segment z1.

[0155] The filter 600 is located near the image side, for example, on the image side of the focus unit 300. The filter 600 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.

[0156] In some embodiments, when a lens assembly is capturing a distant object, n light rays at different angles enter the lens assembly. The light paths of the light rays may be parallel to the optical axis or tilted relative to the optical axis, and the direction of the light path depends on the angle of the incident light.

[0157] See again Figure 4 and Figure 5 Taking the first light A1 entering the lens assembly as an example, the first light A1 is incident along a direction perpendicular to the rear housing 30 , that is, the first light A1 enters the lens assembly along the optical axis direction.

[0158] First light ray A1 enters the first optical path adjustment unit 100 along the first optical axis segment z1 and is transmitted to the first reflective surface 101. First light ray A1 is reflected by the first reflective surface 101, changing its optical path and continuing 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 (the z-axis), the first direction D1 is parallel to the direction of the second optical axis segment z2 (the x-axis), and the incident direction D0 is perpendicular to the first direction D1.

[0159] First light ray A1 traveling along the x-axis enters the second optical path adjustment unit 200. It is reflected by the second reflective surface 201, changing its optical path and propagating to the third reflective surface 202. First light ray A1 is reflected again by the third reflective surface 202, changing its optical path and propagating toward the image side along a second direction. In this scenario, the second direction is parallel to the direction of the third optical axis segment z3 (the y-axis direction), and the second direction D2 is perpendicular to the first direction D1.

[0160] exist Figure 6 In the lens assembly shown, the second direction D2 is parallel to the direction of the third optical axis segment z3 (x-axis direction), and the second direction D2 is parallel to the first direction D1 and in the opposite direction.

[0161] Figure 7 Schematic diagram of the optical path of the lens assembly provided in the embodiment of the present application. Figure 7 for Figure 3 Side view from another perspective.

[0162] Combine Figure 4 and Figure 7 As shown, in some embodiments, for other light rays A tilted relative to the optical axis n-1 , other light A n-1 Enters the first optical path adjustment unit 100 along a direction with a certain angle relative to the first optical axis segment z1 and is transmitted to the first reflecting surface 101. n-1 Reflection occurs at the first reflective surface 101, changing the light path and continuing to propagate along the first direction D1. In this scenario, the incident direction D0 forms an angle with the direction of the first optical axis segment z1 (the z-axis direction), and the first direction D1 forms an angle with the direction of the second optical axis segment z2 (the x-axis direction). The incident direction D0 and the first direction D1 may or may not be perpendicular.

[0163] The first light ray A1 transmitted along the first direction D1 enters the second optical path adjustment unit 200. The first light ray A1 is reflected at the second reflecting surface 201, changing the optical path direction and propagating to the third reflecting surface 202. The first light ray A1 is reflected again at the third reflecting surface 202, changing the optical path and propagating along the second direction D2 to the image side. In this scenario, the second direction D2 has a certain angle with the direction of the third optical axis segment z3 (y-axis direction), and the second direction D2 and the first direction D1 can be perpendicular or not perpendicular.

[0164] In Figure 6 In the lens assembly shown, the second direction D2 has a certain angle with the direction of the third optical axis segment z3 (x-axis direction), and the second direction D2 and the first direction D1 can be parallel or not parallel, but in opposite directions.

[0165] The lens assembly provided by the embodiments of the present application uses the reflection effect of the first optical path adjustment unit 100 to deflect the light transmission route in the lens assembly. 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 no longer propagates completely along the z-axis direction. In this way, the component volume originally stacked longitudinally (such as the z-axis direction) can be converted into the transverse direction (such as the x-axis direction) 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. The second optical path adjustment unit 200 is used to transmit and / or reflect the optical path of the first light ray to achieve the purpose of optical path turning, such as adjusting the propagation along the x-axis direction 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, an anti-shake function and a compensation function, and the focusing unit, the anti-shake unit and the compensation unit are used to process the first light ray to improve the imaging quality.

[0166] In some embodiments, the lens assembly has an effective focal length F (unit: mm), such 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 side of the first optical path adjustment unit 100 and the outermost side of the second optical path adjustment unit 200 along the x-axis direction.

[0167] The length L and the effective focal length F satisfy: 0.7 < L / F < 1; the effective focal length F satisfies: F > 40 mm, preferably, F > 45 mm.

[0168] For example, the length L may be 36.94 mm, 37.89 mm, 39.37 mm, 43.16 mm, 42.22 mm, 39.85 mm, 40.73 mm, or 40.8 mm, etc. The effective focal length F may be 47.92 mm, 47.95 mm, 47.96 mm, 47.97 mm, 47.98 mm, 48 mm, or 48.01 mm, etc. The ratio L / F may be 0.7, 0.77, 0.79, 0.82, 0.83, 0.85, 0.88, 0.9, or 1, etc.

[0169] In this way, by constraining the effective focal length F of the lens assembly, the lens assembly can have an ultra-long focal length. Furthermore, by controlling the ratio of the telephoto lens assembly's total optical length 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, i.e., the horizontal direction during normal use. This prevents the telephoto lens assembly from becoming oversized, thereby better meeting the requirements for small size and compact structure of portable electronic devices.

[0170] In some embodiments, the lens assembly has an entrance pupil diameter EPD (in mm), such as Figure 5 As shown, along the second direction (y-axis direction), the lens assembly has a width W (in mm), wherein the width W is the distance between the outermost side of the second optical path adjustment unit 200 and the image side (such as the imaging surface) along the y-axis direction.

[0171] Width W and entrance pupil diameter EPD meet: 1.5 <W / EPD<3。

[0172] For example, the width W may be 20.98 mm, 22.61 mm, 22.74 mm, 24.13 mm, 26.48 mm, 27.17 mm, 29.2 mm, or 32.95 mm, etc. The entrance pupil diameter EPD may be 11.98 mm, 13.7 mm, 13.71 mm, or 13.72 mm, etc. W / EPD may be 1.5, 1.53, 1.65, 1.66, 1.76, 1.93, 1.98, 2.13, 2.75, or 3, etc.

[0173] 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 dimensions of the telephoto lens assembly can be effectively ensured not to be too large, so that the portable electronic device in which it is installed can meet the requirements of small size and compact structure.

[0174] In some embodiments, as Figure 4 As shown, the telephoto lens assembly has a height H in the z-axis direction, and satisfies H<13 mm. The height H is the maximum thickness of the first optical path adjustment unit 100 or the anti-shake unit 400 along the z-axis direction.

[0175] In this way, by rationally designing the lens assembly and trimming the lens unit, the structural dimensions of the telephoto optical imaging system can be effectively ensured not to be too large, so that the portable electronic device in which it is installed can meet the market demand for small size and compact structure.

[0176] 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: 0.4<|FGA / F|<2.0.

[0177] For example, FGA may be -72.29 mm, -70.46 mm, -62.67 mm, -28.79 mm, 23.4 mm, 43.57 mm, 60.15 mm, or 95.84 mm, etc. |FGA / F| may be 0.4, 0.49, 0.6, 0.91, 1.25, 1.31, 1.51, 1.47, or 2.0, etc.

[0178] In this way, the effective focal length F of the lens assembly is conducive to reasonably setting the focal length FGA of the focusing unit 300 in the lens assembly, so as to reduce the changes in various aberrations, headed by spherical aberration, when the lens assembly focuses from an object at infinity to an object at close range, while ensuring a better balance between the size of the lens assembly and the imaging quality.

[0179] In some embodiments, the anti-shake 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: 0.5<|FGO / F|<1.6.

[0180] For example, FGO may be -42.62 mm, -37.33 mm, -37.1 mm, -33.822 mm, -24 mm, 52.08 mm, 54.39 mm, or 76.4 mm, etc. |FGO / F| may be 0.5, 0.71, 0.77, 0.78, 0.89, 1.08, 1.13, 1.59, or 1.6, etc.

[0181] In this way, the effective focal length F of the lens assembly is conducive to reasonably setting the focal length FGO of the anti-shake unit 400 in the lens assembly to compensate for the image offset caused by hand shake or body shake after the lens is tilted to a certain angle, while ensuring a better balance between the size of the lens assembly and the imaging quality.

[0182] In some embodiments, the compensation unit 500 has a focal length FGC (in mm), and the focal length FGC and the effective focal length F of the lens assembly satisfy: 0.4<|FGC / F|<5.0.

[0183] For example, FGC may be -92.08 mm, -91.08 mm, -76.43 mm, -39.61 mm, -35.18 mm, 20.21 mm, 160.36 mm, or 239.61 mm, etc. |FGC / F| may be 0.4, 0.42, 0.73, 0.83, 1.59, 1.9, 1.92, 3.34, or 5, etc.

[0184] This is conducive to reasonably setting the focal length of the imaging system compensation lens unit, and by properly correcting the aberration changes caused by the movement of the focus lens unit GA and the anti-shake unit GO, it is possible to ensure a good balance between the size and imaging quality of the imaging system.

[0185] In some embodiments, the lens assembly has an aperture value F#, and the aperture value F# satisfies: F#≤4.0.

[0186] For example, F# may be 3.5 or 4, etc.

[0187] This is beneficial for increasing the entrance pupil diameter of the lens assembly and improving the imaging quality of the lens assembly in a dark light environment.

[0188] 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, 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 second lens 302 .

[0189] The total thickness TGA and the entrance pupil diameter EPD of the lens assembly meet the following requirements: 0.15 <TGA / EPD<0.5。

[0190] For example, TGA may be 2.472 mm, 2.652 mm, 4.027 mm, 4.688 mm, 4.72 mm, 5.02 mm, 5.087 mm, or 5.983 mm, etc. TGA / EPD may be 0.15, 0.18, 0.19, 0.29, 0.34, 0.37, or 0.5, etc.

[0191] By controlling the ratio of the total thickness TGA of the telephoto lens assembly's focusing unit 300 to the entrance pupil diameter EPD, the length of the telephoto lens assembly can be controlled in the normal direction of the imaging plane, i.e., the horizontal direction during normal use. This prevents the telephoto lens assembly from being too large. At the same time, the total thickness of the focusing unit 300 can be kept small, reducing the requirements for motor travel and accuracy. Therefore, the requirements for small size and compact structure of portable electronic devices can be better met.

[0192] In some embodiments, the anti-shake unit 400 has a total thickness TGO (in 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 third lens 401 and the image side surface of the fourth lens 402.

[0193] The total thickness TGO and the entrance pupil diameter EPD of the lens assembly satisfy: 0.15 < TGO / EPD < 0.6.

[0194] Exemplarily, TGO can be 2.525 mm, 3.686 mm, 3.879 mm, 4.209 mm, 5.087 mm, 5.109 mm, 5.983 mm, 7.748 mm, etc. TGO / EPD can be 0.15, 0.18, 0.27, 0.28, 0.31, 0.37, 0.5, 0.56, 0.6, etc.

[0195] In this way, 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 surface, that is, the horizontal direction during normal use, and the structural size of the telephoto lens assembly can be prevented from being too large; at the same time, a smaller total thickness of the anti-shake unit 400 can be ensured, and the requirements for the motor stroke and accuracy can be reduced. Therefore, the requirements for small size and compact structure of the portable electronic device can be better met.

[0196] In some embodiments, the focusing unit 300 has a focusing movement stroke DGA (in mm), and the focusing movement stroke DGA of the focusing unit 300 and the effective focal length F of the lens assembly satisfy: 0.55 < DGA / F^2 × 1000 < 1.05. Where 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.

[0197] Exemplarily, DGA can be 1.374 mm, 1.376 mm, 1.47 mm, 1.748 mm, 2.4 mm, etc. DGA / F^2 × 1000 can be 0.55, 0.6, 0.64, 0.76, 1.04, 1.05, etc.

[0198] In this way, it is beneficial to reasonably allocate the movement stroke of the driving motor while ensuring good focusing accuracy of the motor.

[0199] In some embodiments, the anti-shake unit 400 has an anti-shake angle OA (in degrees) and an anti-shake travel DGO (in mm). The anti-shake travel can also be called an anti-shake translation. The anti-shake angle OA and the anti-shake travel DGO satisfy the following: 0.8 < |DGO / OA| < 1.5, and the unit is mm / °.

[0200] For example, OA can be 0.5°, etc. DGO can be -0.498 mm, 0.474 mm, 0.482 mm, 0.499 mm, 0.5 mm, 0.649 mm, 0.626 mm, or 0.75 mm, etc. |DGO / OA| can be 0.8, 0.95, 0.96, 1.0, 1.3, 1.25, or 1.5, etc.

[0201] This helps to reduce the travel of the drive motor while ensuring a sufficiently large anti-shake angle OA, thereby compressing the volume of the anti-shake unit 400 and ensuring that the telephoto lens assembly has good optical performance while taking into account structural miniaturization.

[0202] The lens assembly provided in the embodiment of the present application utilizes the transmission and / or reflection effects of the first optical path adjustment unit 100 and the second optical path adjustment unit 200 to change the propagation path of light. In this way, not only can an ultra-long focal length be achieved, but the volume of the lens assembly can also be reduced, making the structure of the lens assembly compact and reducing the internal space occupied by the electronic device to meet the development of lightweight and thin electronic devices. At the same time, constraining the parameters of each component in the lens assembly can not only reduce the volume of each component, making the structure of the lens assembly compact and smaller, but also improve imaging quality, reduce the requirements for motor stroke and accuracy, and ensure that the focusing assembly and anti-shake assembly are fully lightweight.

[0203] The structure and performance of the lens assembly provided by the embodiments of the present application are described below in conjunction with specific embodiments (Examples 1 to 8). For ease of description, the first optical path adjustment unit 100 is denoted as GP1, the second optical path adjustment unit 200 is denoted as GP2, the focus unit 300 is denoted as GA, the anti-shake unit 400 is denoted as GO, and the compensation unit 500 is denoted as GC.

[0204] Example 1:

[0205] Figure 8 This is a schematic diagram of the structure of the lens assembly provided in Example 1 of the present application. Figure 8 The structure and performance of the lens assembly provided in Example 1 of the present application are described.

[0206] like Figure 8As shown, the lens assembly includes, along the optical axis, from the object side to the image side, a first optical path adjustment unit GP1, a focus unit GA, an anti-shake unit GO, a second optical path adjustment unit GP2, and a compensation unit GC. An aperture stop is provided at the front of GP1, and a filter 600 is provided on the image side of GC. The lens assembly provided in Example 1 has a length L = 36.94 mm and a width W = 29.2 mm.

[0207] The object side has an object surface. The surface of the aperture stop is S1 (as shown in Table 1-1), and GP1 includes the object side surface S2 and the image side surface S3, wherein the object side surface S2 corresponds to Figure 4 The first light incident surface 102 shown in FIG. Figure 4 The first light emitting surface 103 is shown, which will not be described in detail below. The focusing unit GA includes two lenses, namely lens L1 and lens L2, wherein lens L1 and lens L2 correspond to Figure 5 The first lens 301 and the second lens 302 are shown, which will not be described in detail below. Lens L1 includes an object side surface S4 and an image side surface S5; lens L2 includes an object side surface S6 and an image side surface S6, and the object side surface of lens L2 is bonded to the image side surface S5 of lens L1. The anti-shake unit GO includes two lenses, namely lens L3 and lens L4, wherein lenses L3 and L4 correspond to Figure 5 The third lens 401 and the fourth lens 402 are shown in FIG. 4 and are not described in detail below. 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, wherein the object-side surface S11 corresponds to Figure 5 The second light incident surface 203 shown, like the side surface S12 corresponds to Figure 5 The second light-emitting surface 204 shown is not described in detail below. The compensation unit GC includes two groups, each group GC includes two lenses, namely lenses L5, L6, L7 and L8. Lenses L5 and L6 are bonded together, and lenses L7 and L8 are bonded together. There is a gap between lenses L6 and L7. Lens L5 includes an object-side surface S13 and an image-side surface S14; lens L6 includes an object-side surface and an image-side surface S15, and the object-side surface of lens L6 is bonded to the image-side surface S14 of lens L5. Lens L7 includes an object-side surface S16 and an image-side surface S17; lens L8 includes an object-side surface and an image-side surface S18, and the object-side surface of lens L8 is bonded to the image-side surface S17 of lens L7. The filter 600 includes an object-side surface S19 and an image-side surface S20. The image side has an image surface S0, which can be understood as an imaging surface and is not described in detail below.

[0208] The object side surface S2 of GP1 is convex toward the object side at the optical axis (abbreviated as "convex surface"), while the image side surface S3 is flat at the optical axis. In GA, the object side surface S4 of lens L1 is convex at the optical axis, while the image side surface S5 is convex toward the object side at the optical axis (abbreviated as "concave surface"). The object side surface S7 of lens L3 is convex at the optical axis, while the image side surface S6 is flat at the optical axis. In GO, the object side surface S7 of lens L3 is convex at the optical axis, while the image side surface S8 is convex at the optical axis. The object side surface S9 of lens L4 is concave at the optical axis, while the image side surface S10 is concave at the optical axis. The object side surface S11 and image side surface S12 of GP2 are flat at the circumference. In GC, the object side surface S13 of lens L5 is convex at the optical axis, while the image side surface S13 is convex at the optical axis. The object side surface of lens L6 is concave at the optical axis, while the image side surface S14 is concave at the optical axis. The object-side surface S15 of lens L7 is concave at the optical axis, and the image-side surface S16 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 S18 is concave at the optical axis.

[0209] Table 1-1 shows the optical parameters of the lens assembly provided in Example 1; Table 1-2 shows the aspheric coefficients of the lens assembly provided in Example 1; Table 1-3 shows the relevant data of the GA unit, GO unit and GC unit in the lens assembly provided in Example 1; Table 1-4 shows the parameter relationship formulas of each component in the lens assembly provided in Example 1.

[0210] In some embodiments, the lens assembly can set the optical parameters of each component in the lens assembly according to the data shown in Table 1-1, Table 1-2, Table 1-3 and Table 1-4.

[0211] Table 1-1 Optical parameters of the lens assembly provided in Example 1

[0212]

[0213]

[0214] Table 1-2 Aspheric coefficients of the lens assembly provided in Example 1

[0215] Surface number S2 S7 S8 S9 S10 K -13.87642229 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A4 0.073856543 -1.950480E-01 -3.059765E-01 1.594286E+00 1.076556E+00 A6 -0.002076862 -2.871818E-02 1.160050E-02 -1.638016E-01 -1.821866E-01 A8 0.0001005 -5.556739E-03 -7.381317E-03 5.478749E-02 3.768669E-02 A10 -6.44E-06 -1.907766E-03 8.002683E-04 -9.805852E-03 -7.992875E-03 A12 2.27E-06 -5.453561E-04 -6.453256E-04 3.211783E-03 1.784184E-03 A14 -2.48E-06 1.152510E-04 2.424898E-04 -7.022963E-04 -4.317723E-04 A16 1.76E-06 -1.433422E-04 -3.048544E-04 1.302818E-04 1.462937E-04 A18 -3.09E-06 6.787361E-05 1.756927E-04 -6.034746E-06 -6.203333E-05 A20 -6.975273E-05 -1.750898E-04 -8.750243E-05 6.642228E-06 A22 4.280794E-05 1.612055E-04 1.092759E-04 2.993389E-06 A24 -1.872228E-05 -8.790309E-05 -7.694354E-05 -1.986858E-06 A26 1.086525E-05 3.322020E-05 3.075272E-05 4.772782E-06 A28 A30

[0216] Table 1-3 Relevant data of GA unit and GO unit in the lens assembly provided in Example 1

[0217] Parameter name Parameter value FGA (GA unit focal length, mm) 60.15 TGA (GA unit thickness, mm) 2.472 DGA (AF stroke, mm) 1.374 FGO (focal length of GO unit, mm) -33.822 TGO (GO unit thickness, mm) 2.525 DGO (OIS translation, mm) 0.500 OA (OIS angle, degrees) 0.5 FGC (GC unit focal length, mm) 160.36

[0218] Table 1-4 Parameter relationship formula of each component in the lens assembly provided in Example 1

[0219] Conditional expression Value F#≤4.0 3.50 0.15<TGA / EPD<0.5 0.18 0.15<TGO / EPD<0.6 0.18 0.4<|FGA / F|<2.0 1.25 0.5<|FGO / F|<1.6 0.71 0.55<DGA / F^2×1000<1.05 0.60 0.8<|DGO / OA|<1.5 1.00 0.4<|FGC / F|<5.0 3.34 0.7<L / F<1 0.77 1.5<W / EPD<3 2.13

[0220] It should be noted that Table 1-1 presents parameters such as the surface type, curvature radius, thickness or distance, material, refractive index, Abbe number, and focal length of each lens, aperture stop, and filter 600 in the lens assembly provided in Example 1. The curvature radius in Table 1-1 refers to the lens corresponding to the surface number, that is, the curvature radius of the object side or image side of the lens corresponding to each surface number at the optical axis. "Infinity" in the "Curvature Radius" parameter column indicates that the object side or image side of the lens is flat; "blank" in the "Material" parameter column indicates that the object side or image side of the lens is adjacent to air, and the corresponding "Refractive Index," "Abbe Number," and "Focal Length" parameter columns also contain "blank."

[0221] In Example 1, referring to Table 1-1, the effective focal length of the lens assembly is F=47.97 mm, the aperture number F# is 3.5, the field of view angle FOV is 8.4°, and the entrance pupil diameter EPD is 13.71 mm.

[0222] Filters 600, GP1, GP2, GA, GO, and GC can be made of glass or plastic, as shown in Table 1-1.

[0223] The surface types of the object planes S1 to S20 and the image plane S0 are spherical or aspherical, wherein the aspherical coefficients can be calculated based on the aspherical curve equation of the aforementioned embodiment.

[0224] See Table 1-2, which shows the aspheric coefficients of the aspheric surface types S2, S7 to S10. K is the conic coefficient in the aspheric curve equation, and A4, A6, ... A30 are the aspheric coefficients of the 4th to 30th order of each surface, corresponding to a1, a2, ... a in the aspheric curve equation. 13 .

[0225] See Table 1-3, the focal length of the GA unit FGA = 60.15mm, the total thickness of the GA unit TGA = 2.472mm, the focus movement stroke of the GA unit DGA = 1.374mm, the focal length of the GO unit FGO = -33.822mm, the total thickness of the GO unit TGO = 2.525mm, the anti-shake translation amount of the GO unit DGO = 0.5mm, the anti-shake angle OA = 0.5°, and the focal length of the GC unit FGC = 160.36mm.

[0226] The total thickness TGA of the GA unit is the distance between the object-side surface S4 of the lens L1 and the image-side surface S6 of the lens L2, and the total thickness TGO of the GO unit is the distance between the object-side surface S7 of the lens L3 and the image-side surface S10 of the lens L4.

[0227] See Table 1-4, which shows the values of the parameter relationship formulas of each component in the lens assembly. Among them, 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=0.18; the relationship between the total thickness TGO of the anti-shake unit GO and the entrance pupil diameter EPD is TGO / EPD=0.18; 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|=1.25; the relationship between the focal length FGO of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=0.71; the relationship between the focusing unit The relationship between the focus movement stroke DGA of GA and the effective focal length F of the lens assembly is DGA / F^2×1000=0.6; the relationship between the anti-shake angle OA of the anti-shake unit GO and the anti-shake stroke DGO is |DGO / OA|=1; the relationship between the focal length FGC of the compensation unit GC and the effective focal length F of the lens assembly is |FGC / F|=3.34; the relationship between the length L of the lens assembly and the effective focal length F is L / F=0.77; the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD=2.13.

[0228] Figure 9 : This is the field curvature diagram and distortion diagram of the lens assembly provided in Example 1 of the present application. Figure 9 (a) is a field curvature diagram of the lens assembly provided in Example 1 of the present application, Figure 9 The solid line in (a) is the meridian field curvature, Figure 9 The dotted line in (a) is the sagittal field curvature; Figure 9 (b) is a distortion diagram of the lens assembly provided in Example 1 of the present application.

[0229] Depend on Figure 9 From the field curvature diagram shown in (a), we can see that the sagittal field curvature and the meridional field curvature are both controlled within a relatively small range, which reflects that the curvature of the imaging surface is well controlled. Figure 9 As can be seen from the distortion diagram shown in (b), the lens assembly provided in Example 1 has relatively small distortion, which means that the image deformation caused by the main light beam is relatively small, and the imaging distortion effect is low.

[0230] Therefore, the lens assembly provided in the first embodiment can achieve the goals of telephoto characteristics, miniaturization, compact structure and high imaging quality, while ensuring that the focusing unit GA, the anti-shake unit GO and the compensation unit GC are sufficiently lightweight.

[0231] It should be noted that the definitions of the data in the tables of the following embodiments are the same as those in Table 1-1 to Table 1-4 of Example 1 and will not be elaborated on subsequently.

[0232] Example 2:

[0233] Figure 10This is a schematic diagram of the structure of the lens assembly provided in Example 2 of this application. Figure 10 The structure and performance of the lens assembly provided in Example 2 of the present application are described.

[0234] like Figure 10 As shown, the lens assembly includes, along the optical axis, from the object side to the image side, a first optical path adjustment unit GP1, an anti-shake unit GO, a focus unit GA, a second optical path adjustment unit GP2, and a compensation unit GC. An aperture stop is provided at the front of GP1, and a filter 600 is provided on the image side of GC. The lens assembly provided in Example 2 has a length L = 37.89 mm and a width W = 22.61 mm.

[0235] The object side has an object surface. The aperture stop surface is S1 (as shown in Table 2-1), and GP1 includes an object-side surface S2 and an image-side surface S3. The anti-shake unit GO includes two lenses, namely, lenses L1 and L2. Lens L1 includes an object-side surface S4 and an image-side surface S5; lens L2 includes an object-side surface S6 and an image-side surface S7. The focusing unit GA includes two lenses, namely, lenses L3 and L4. Lens L3 includes an object-side surface S8 and an image-side surface S9; lens L4 includes an object-side surface S10 and an image-side surface S11. GP2 includes an object-side surface S12 and an image-side surface S13. The compensation unit GC includes three lenses, namely, lenses L5, L6, and L7. Lens L5 includes an object-side surface S14 and an image-side surface S15; lens L6 includes an object-side surface S16 and an image-side surface S17; and lens L7 includes an object-side surface S18 and an image-side surface S19. The filter 600 includes an object-side surface S20 and an image-side surface S21. The image side has an image surface S0.

[0236] The object-side surface S2 of GP1 is convex along the optical axis, and the image-side surface S3 is convex along the optical axis. In GO, the object-side surface S4 of lens L1 is convex along the optical axis, and the image-side surface S5 is convex along the optical axis. The object-side surface S6 of lens L2 is concave along the optical axis, and the image-side surface S7 is concave along the optical axis. In GA, the object-side surface S8 of lens L3 is convex along the optical axis, and the image-side surface S9 is concave along the optical axis. The object-side surface S10 of lens L4 is convex along the optical axis, and the image-side surface S11 is convex along the optical axis. The object-side surface S12 and the image-side surface S13 of GP2 are flat along the circumference. In GC, the object-side surface S14 of lens L5 is concave along the optical axis, and the image-side surface S15 is convex along the optical axis. The object-side surface S16 of lens L6 is concave along the optical axis, and the image-side surface S17 is concave along the optical axis. The object-side surface S18 of the lens L7 is convex at the optical axis, and the image-side surface S19 is convex at the optical axis.

[0237] Table 2-1 shows the optical parameters of the lens assembly provided in Example 2; Table 2-2 shows the aspheric coefficients of the lens assembly provided in Example 2; Table 2-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Example 2; Table 2-4 shows the parameter relationship formulas of each component in the lens assembly provided in Example 2.

[0238] In some embodiments, the lens assembly can set the optical parameters of each component in the lens assembly according to the data shown in Table 2-1, Table 2-2, Table 2-3 and Table 2-4.

[0239] Table 2-1 Optical parameters of the lens assembly provided in Example 2

[0240]

[0241]

[0242] Table 2-2 Aspheric coefficients of the lens assembly provided in Example 2

[0243]

[0244]

[0245]

[0246] Table 2-3 Relevant data of GA unit and GO unit in the lens assembly provided in Example 2

[0247] Parameter name Parameter value FGA (GA unit focal length, mm) 23.40 TGA (GA unit thickness, mm) 4.027 DGA (AF stroke, mm) 1.376 FGO (focal length of GO unit, mm) -37.10 TGO (GO unit thickness, mm) 3.686 DGO (OIS translation, mm) 0.499 OA (OIS angle, degrees) 0.5 FGC (GC unit focal length, mm) -92.08

[0248] Table 2-4 Parameter relationship formula of each component in the lens assembly provided in Example 2

[0249] Conditional expression Value F#≤4.0 3.50 0.15<TGA / EPD<0.5 0.29 0.15<TGO / EPD<0.6 0.27 0.4<|FGA / F|<2.0 0.49 0.5<|FGO / F|<1.6 0.77 0.55<DGA / F^2×1000<1.05 0.60 0.8<|DGO / OA|<1.5 1.00 0.4<|FGC / F|<5.0 1.92 0.7<L / F<1 0.79 1.5<W / EPD<3 1.65

[0250] In Example 2, referring to Table 2-1, the effective focal length of the lens assembly is F=47.96 mm, the aperture number F# is 3.5, the field of view angle FOV is 8.4°, and the entrance pupil diameter EPD is 13.7 mm.

[0251] Filters 600, GP1, GP2, GA, GO, and GC can be made of glass or plastic, as shown in Table 1-1.

[0252] The surface types of the object planes S1 to S21 and the image plane S0 are spherical or aspherical, wherein the aspherical coefficients can be calculated based on the aspherical curve equation of the aforementioned embodiment.

[0253] See Table 1-2, which shows the aspheric coefficients of surfaces S4 to S11, S14 to S19 using the aspheric type. Among them, K is the conic coefficient in the aspheric curve equation, and A4, A6, ... A30 are the aspheric coefficients of the 4th to 30th order of each surface, corresponding to a1, a2, ... a in the aspheric curve equation. 13 .

[0254] See Table 1-3, the focal length of the GA unit FGA = 23.4mm, the total thickness of the GA unit TGA = 4.027mm, the focus movement stroke of the GA unit DGA = 1.376mm, the focal length of the GO unit FGO = -37.1mm, the total thickness of the GO unit TGO = 3.686mm, the anti-shake translation amount of the GO unit DGO = 0.499mm, the anti-shake angle OA = 0.5°, and the focal length of the GC unit FGC = -92.08mm.

[0255] The total thickness TGO of the GO unit is the distance between the object-side surface S4 of the lens L1 and the image-side surface S7 of the lens L2, and the total thickness TGA of the GA unit is the distance between the object-side surface S8 of the lens L3 and the image-side surface S11 of the lens L4.

[0256] See Table 1-4, which shows the values of the parameter relationship formulas of each component in the lens assembly. Among them, 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=0.29; the relationship between the total thickness TGO of the anti-shake unit GO and the entrance pupil diameter EPD is TGO / EPD=0.27; 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|=0.49; the relationship between the focal length FGO of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=0.77; the focus unit The relationship between the focus movement stroke DGA of GA and the effective focal length F of the lens assembly is DGA / F^2×1000=0.6; the relationship between the anti-shake angle OA of the anti-shake unit GO and the anti-shake stroke DGO is |DGO / OA|=1; the relationship between the focal length FGC of the compensation unit GC and the effective focal length F of the lens assembly is |FGC / F|=1.92; the relationship between the length L of the lens assembly and the effective focal length F is L / F=0.79; the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD=1.65.

[0257] Figure 11 This is the field curvature diagram and distortion diagram of the lens assembly provided in Example 2 of the present application. Figure 11 (a) is a field curvature diagram of the lens assembly provided in Example 2 of the present application, Figure 11 The solid line in (a) is the meridian field curvature, Figure 11 The dotted line in (a) is the sagittal field curvature; Figure 11 (b) is a distortion diagram of the lens assembly provided in Example 2 of the present application.

[0258] Depend on Figure 11 From the field curvature diagram shown in (a), we can see that the sagittal field curvature and the meridional field curvature are both controlled within a relatively small range, which reflects that the curvature of the imaging surface is well controlled. Figure 11 As can be seen from the distortion diagram shown in (b), the lens assembly provided in Example 2 has relatively small distortion, which means that the image deformation caused by the main light beam is relatively small, and the imaging distortion effect is low.

[0259] Therefore, the lens assembly provided in the second embodiment can achieve the goals of telephoto characteristics, miniaturization, compact structure and high imaging quality, while ensuring that the focusing unit GA, the anti-shake unit GO and the compensation unit GC are sufficiently lightweight.

[0260] Example 3:

[0261] Figure 12 This is a schematic diagram of the structure of the lens assembly provided in Example 3 of this application. Figure 12 The structure and performance of the lens assembly provided in Example 3 of the present application are described.

[0262] like Figure 12 As shown, the lens assembly includes, along the optical axis, from the object side to the image side, a first optical path adjustment unit GP1, a focus unit GA, an anti-shake unit GO, a second optical path adjustment unit GP2, and a compensation unit GC. An aperture stop is provided at the front of GP1, and a filter 600 is provided on the image side of GC. The lens assembly provided in Example 3 has a length L = 39.37 mm and a width W = 26.48 mm.

[0263] The object side has an object surface. 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. The focusing unit GA includes three lenses, namely lenses L1, L2, and L3. 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, and the object-side surface of lens L2 is bonded to the image-side surface S5 of lens L1; lens L3 includes an object-side surface and an image-side surface S7, and the object-side surface of lens L3 is bonded to the image-side surface S6 of lens L2. The anti-shake unit GO includes two lenses, namely lenses L4 and L5. Lens L4 includes an object-side surface S8 and an image-side surface S9; lens L5 includes an object-side surface S10 and an image-side surface S11. GP2 includes an object-side surface S12 and an image-side surface S13. The compensation unit GC comprises two groups, each consisting of two lenses: L6, L7, L8, and L9. Lenses L6 and L7 are bonded together, and lenses L8 and L9 are bonded together, with a space between them. Lens L6 includes an object-side surface S14 and an image-side surface S15; lens L7 includes an object-side surface and an image-side surface S16, with the object-side surface of lens L7 bonded to the image-side surface S15 of lens L6. Lens L8 includes an object-side surface S17 and an image-side surface S18; lens L9 includes an object-side surface and an image-side surface S19, with the object-side surface of lens L9 bonded to the image-side surface S18 of lens L8. The filter 600 includes an object-side surface S20 and an image-side surface S21. The image side has an image surface S0.

[0264] The object-side surface S2 of GP1 is convex at the optical axis, and the image-side surface S3 is flat at the circumference. In GA, the object-side surface S4 of lens L1 is flat at the circumference, and the image-side surface S5 is convex at the optical axis. The object-side surface of lens L2 is concave at the optical axis, and the image-side surface S6 is concave at the optical axis. The object-side surface S8 of lens L4 is convex at the optical axis, and the image-side surface S7 is concave at the optical axis. In GO, the object-side surface S8 of lens L4 is convex at the optical axis, and the image-side surface S9 is concave at the optical axis. The object-side surface S10 of lens L5 is convex at the optical axis, and the image-side surface S11 is concave at the optical axis. The object-side surface S12 and the image-side surface S13 of GP2 are flat at the circumference. In GC, the object-side surface S14 of lens L6 is concave at the optical axis, and the image-side surface S15 is convex at the optical axis. The object-side surface of lens L7 is concave along the optical axis, and the image-side surface S16 is concave along the optical axis. The object-side surface of lens L8 is convex along the optical axis, and the image-side surface S18 is convex along the optical axis. The object-side surface of lens L9 is concave along the optical axis, and the image-side surface S19 is convex along the optical axis.

[0265] Table 3-1 shows the optical parameters of the lens assembly provided in Example 3; Table 3-2 shows the aspheric coefficients of the lens assembly provided in Example 3; Table 3-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Example 3; Table 3-4 shows the parameter relationship formulas of each component in the lens assembly provided in Example 3.

[0266] In some embodiments, the lens assembly can set the optical parameters of each component in the lens assembly according to the data shown in Table 3-1, Table 3-2, Table 3-3 and Table 3-4.

[0267] Table 3-1 Optical parameters of the lens assembly provided in Example 3

[0268]

[0269]

[0270] Table 3-2 Aspheric coefficients of the lens assembly provided in Example 3

[0271] Surface number S2 S8 S9 S10 S11 K 0 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A4 -0.008513919 -3.340691E-01 -7.284926E-01 -7.588717E-02 -8.847546E-02 A6 -0.00011916 2.450788E-02 -6.898045E-02 -2.421230E-02 -2.234626E-02 A8 -9.50E-06 -1.117691E-04 -1.081194E-02 4.344637E-03 -2.866023E-03 A10 4.98E-06 -1.279808E-03 -6.244622E-03 -4.951497E-04 -7.442241E-04 A12 -1.78E-06 1.577839E-03 3.089597E-03 3.229731E-03 2.511705E-04 A14 -1.006817E-03 -1.365295E-03 8.022628E-05 -5.732398E-05 A16 6.705270E-04 1.553614E-03 1.246184E-03 1.343708E-04 A18 -5.585508E-04 -7.707246E-04 -1.577068E-04 -5.124727E-05 A20 1.476232E-04 2.143399E-05 -1.882543E-05 -2.983585E-06 A22 A24 A26 A28 A30

[0272] Table 3-3 Relevant data of GA unit and GO unit in the lens assembly provided in Example 3

[0273] Parameter name Parameter value FGA (GA unit focal length, mm) -62.67 TGA (GA unit thickness, mm) 5.087 DGA (AF stroke, mm) 2.400 FGO (focal length of GO unit, mm) 52.08 TGO (GO unit thickness, mm) 5.087 DGO (OIS translation, mm) 0.649 OA (OIS angle, degrees) 0.5 FGC (GC unit focal length, mm) -39.61

[0274] Table 3-4 Parameter relationship formula of each component in the lens assembly provided in Example 3

[0275] Conditional expression Value F#≤4.0 3.50 0.15<TGA / EPD<0.5 0.37 0.15<TGO / EPD<0.6 0.37 0.4<|FGA / F|<2.0 1.31 0.5<|FGO / F|<1.6 1.08 0.55<DGA / F^2×1000<1.05 1.04 0.8<|DGO / OA|<1.5 1.30 0.4<|FGC / F|<5.0 0.83 0.7<L / F<1 0.82 1.5<W / EPD<3 1.93

[0276] In Example 3, referring to Table 3-1, the effective focal length of the lens assembly is F=48.01 mm, the aperture number F# is 3.5, the field of view angle FOV is 8.3°, and the entrance pupil diameter EPD is 13.72 mm.

[0277] Filters 600, GP1, GP2, GA, GO, and GC can be made of glass or plastic, as shown in Table 1-1.

[0278] The surface types of the object plane, S1 to S21, and the image plane are spherical or aspherical, wherein the aspherical coefficients can be calculated based on the aspherical curve equation of the aforementioned embodiment.

[0279] See Table 1-2, which shows the aspheric coefficients of the aspheric surface types S2, S8 to S11. K is the conic coefficient in the aspheric curve equation, and A4, A6, ... A30 are the aspheric coefficients of the 4th to 30th order of each surface, corresponding to a1, a2, ... a in the aspheric curve equation. 13 .

[0280] See Table 1-3, the focal length of the GA unit FGA = -62.67mm, the total thickness of the GA unit TGA = 5.087mm, the focus movement stroke of the GA unit DGA = 2.4mm, the focal length of the GO unit FGO = 52.08mm, the total thickness of the GO unit TGO = 5.087mm, the anti-shake translation amount of the GO unit DGO = 0.649mm, the anti-shake angle OA = 0.5°, and the focal length of the GC unit FGC = -39.61mm.

[0281] The total thickness TGA of the GA unit is the distance between the object-side surface S4 of the lens L1 and the image-side surface S7 of the lens L3, and the total thickness TGO of the GO unit is the distance between the object-side surface S8 of the lens L4 and the image-side surface S11 of the lens L5.

[0282] See Table 1-4, which shows the values of the parameter relationship formulas of each component in the lens assembly. Among them, 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=0.37; the relationship between the total thickness TGO of the anti-shake unit GO and the entrance pupil diameter EPD is TGO / EPD=0.37; 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|=1.31; the relationship between the focal length FGO of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=1.08; the relationship between the focal length FGA of the focusing unit GA and the effective focal length F of the lens assembly is |FGO / F|=1.08; the relationship between the focal length FGA of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=1.08; the relationship between the focal length FGA of the focusing unit GA and the entrance pupil diameter EPD is TGO / EPD=0.37; 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|=1.31; the relationship between the focal length FGO of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=1.08; the relationship between the focal length FGA of the focusing unit GA and the entrance pupil diameter EPD is TGO / EPD=0.37; 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|=1.08 The relationship between the focus movement stroke DGA of A and the effective focal length F of the lens assembly is DGA / F^2×1000=1.04; the relationship between the anti-shake angle OA of the anti-shake unit GO and the anti-shake stroke DGO is |DGO / OA|=1.3; the relationship between the focal length FGC of the compensation unit GC and the effective focal length F of the lens assembly is |FGC / F|=0.82; the relationship between the length L of the lens assembly and the effective focal length F is L / F=0.77; the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD=1.93.

[0283] Figure 13 This is the field curvature diagram and distortion diagram of the lens assembly provided in Example 3 of the present application. Figure 13 (a) is a field curvature diagram of the lens assembly provided in Example 3 of the present application, Figure 13 The solid line in (a) is the meridian field curvature, Figure 13 The dotted line in (a) is the sagittal field curvature; Figure 13 (b) is a distortion diagram of the lens assembly provided in Example 3 of the present application.

[0284] Depend on Figure 13 From the field curvature diagram shown in (a), we can see that the sagittal field curvature and the meridional field curvature are both controlled within a relatively small range, which reflects that the curvature of the imaging surface is well controlled. Figure 13As can be seen from the distortion diagram shown in (b), the lens assembly provided in Example 3 has relatively small distortion, which means that the image deformation caused by the main light beam is relatively small and the imaging distortion effect is low.

[0285] Therefore, the lens assembly provided in the third embodiment can achieve the goals of telephoto characteristics, miniaturization, compact structure and high imaging quality, while ensuring that the focusing unit GA, the anti-shake unit GO and the compensation unit GC are sufficiently lightweight.

[0286] Example 4:

[0287] Figure 14 This is a schematic diagram of the structure of the lens assembly provided in Example 4 of the present application. Figure 14 The structure and performance of the lens assembly provided in Example 4 of the present application are described.

[0288] like Figure 14 As shown, the lens assembly includes, along the optical axis, from the object side to the image side, a first optical path adjustment unit GP1, an anti-shake unit GO, a compensation unit GC, a second optical path adjustment unit GP2, and a focusing unit GA. An aperture stop is provided at the front of GP1, and a filter 600 is provided on the image side of GC. The lens assembly provided in Example 4 has a length L = 43.16 mm and a width W = 22.74 mm.

[0289] The object side has an object surface. The surface of the aperture stop is S1 (as shown in Table 4-1), and GP1 includes an object-side surface S2 and an image-side surface S3. The anti-shake unit GO includes two lenses, namely, lenses L1 and L2. Lens L1 includes an object-side surface S4 and an image-side surface S5; lens L2 includes an object-side surface S6 and an image-side surface S7. The compensation unit GC includes two lenses, namely, lenses L3 and L4. Lens L3 includes an object-side surface S8 and an image-side surface S9; lens L4 includes an object-side surface S10 and an image-side surface S11. GP2 includes an object-side surface S12 and an image-side surface S13. The focusing unit GA includes four lenses, namely, lenses L5, L6, L7, and L8. Lens L5 includes an object-side surface S14 and an image-side surface S15; lens L6 includes an object-side surface and an image-side surface S16, and the object-side surface of lens L6 is bonded to the image-side surface S15 of lens L5. Lens L7 includes an object-side surface and an image-side surface S17. The object-side surface of lens L7 is bonded to the image-side surface S16 of lens L6. Lens L8 includes an object-side surface S18 and an image-side surface S19. Filter 600 includes an object-side surface S20 and an image-side surface S21. The image side has an image surface S0.

[0290] The object-side surface S2 of GP1 is convex along the optical axis, and the image-side surface S3 is concave along the optical axis. In GO, the object-side surface S4 of lens L1 is convex along the optical axis, and the image-side surface S5 is convex along the optical axis. The object-side surface S6 of lens L2 is concave along the optical axis, and the image-side surface S7 is concave along the optical axis. In GC, the object-side surface S8 of lens L3 is convex along the optical axis, and the image-side surface S9 is concave along the optical axis. The object-side surface S10 of lens L4 is convex along the optical axis, and the image-side surface S11 is convex along the optical axis. The object-side surface S12 and the image-side surface S13 of GP2 are flat along the circumference. In GA, the object-side surface S14 of lens L5 is concave along the optical axis, and the image-side surface S15 is convex along the optical axis. The object-side surface S16 of lens L6 is concave along the optical axis, and the image-side surface S16 is convex along the optical axis. The object-side surface 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 convex at the optical axis.

[0291] Table 4-1 shows the optical parameters of the lens assembly provided in Example 4; Table 4-2 shows the aspheric coefficients of the lens assembly provided in Example 4; Table 4-3 shows the relevant data of the GA unit and the GO unit in the lens assembly provided in Example 4; Table 4-4 shows the parameter relationship formulas of each component in the lens assembly provided in Example 4.

[0292] In some embodiments, the lens assembly can set the optical parameters of each component in the lens assembly according to the data shown in Table 4-1, Table 4-2, Table 4-3 and Table 4-4.

[0293] Table 4-1 Optical parameters of the lens assembly provided in Example 4

[0294]

[0295] Table 4-2 Aspheric coefficients of the lens assembly provided in Example 4

[0296]

[0297]

[0298] Table 4-3 Relevant data of GA unit and GO unit in the lens assembly provided in Example 4

[0299] Parameter name Parameter value FGA (GA unit focal length, mm) -28.79 TGA (GA unit thickness, mm) 5.020 DGA (AF stroke, mm) 2.400 FGO (focal length of GO unit, mm) -37.33 TGO (GO unit thickness, mm) 3.879 DGO (OIS translation, mm) 0.474 OA (OIS angle, degrees) 0.5 FGC (GC unit focal length, mm) 20.21

[0300] Table 4-4 Parameter relationship of each component in the lens assembly provided by Example 4

[0301]

[0302]

[0303] In the fourth embodiment, referring to Table 4-1, the effective focal length of the lens assembly is F=47.95 mm, the aperture number F# is 3.5, the field of view angle FOV is 8.4°, and the entrance pupil diameter EPD is 13.7 mm.

[0304] Filters 600, GP1, GP2, GA, GO, and GC can be made of glass or plastic, as shown in Table 1-1.

[0305] The surface types of the object plane, S1 to S21, and the image plane are spherical or aspherical, wherein the aspherical coefficients can be calculated based on the aspherical curve equation of the aforementioned embodiment.

[0306] See Table 1-2, which shows the aspheric coefficients of surfaces S4 to S11, S14 to S19 using the aspheric type. Among them, K is the conic coefficient in the aspheric curve equation, and A4, A6, ... A30 are the aspheric coefficients of the 4th to 30th order of each surface, corresponding to a1, a2, ... a in the aspheric curve equation. 13 .

[0307] See Table 1-3, the focal length of the GA unit FGA = -28.79mm, the total thickness of the GA unit TGA = 5.02mm, the focus movement stroke of the GA unit DGA = 2.4mm, the focal length of the GO unit FGO = -37.33mm, the total thickness of the GO unit TGO = 3.879mm, the anti-shake translation amount of the GO unit DGO = 0.474mm, the anti-shake angle OA = 0.5°, and the focal length of the GC unit FGC = 20.21mm.

[0308] The total thickness TGA of the GA unit is the distance between the object-side surface S14 of the lens L5 and the image-side surface S19 of the lens L8, and the total thickness TGO of the GO unit is the distance between the object-side surface S4 of the lens L1 and the image-side surface S7 of the lens L2.

[0309] See Table 1-4, which shows the values of the parameter relationships of each component in the lens assembly. Among them, 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=0.37; the relationship between the total thickness TGO of the anti-shake unit GO and the entrance pupil diameter EPD is TGO / EPD=0.28; 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|=0.6; the relationship between the focal length FGO of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=0.78; The relationship between the focus movement stroke DGA and the effective focal length F of the lens assembly is DGA / F^2×1000=1.04; the relationship between the anti-shake angle OA of the anti-shake unit GO and the anti-shake stroke DGO is |DGO / OA|=0.95; the relationship between the focal length FGC of the compensation unit GC and the effective focal length F of the lens assembly is |FGC / F|=0.42; the relationship between the length L of the lens assembly and the effective focal length F is L / F=0.9; the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD=1.66.

[0310] Figure 15 This is the field curvature diagram and distortion diagram of the lens assembly provided in Example 4 of the present application. Figure 15 (a) is a field curvature diagram of the lens assembly provided in Example 4 of the present application, Figure 15 The solid line in (a) is the meridian field curvature, Figure 15 The dotted line in (a) is the sagittal field curvature; Figure 15 (b) is a distortion diagram of the lens assembly provided in Example 4 of the present application.

[0311] Depend on Figure 15 From the field curvature diagram shown in (a), we can see that the sagittal field curvature and the meridional field curvature are both controlled within a relatively small range, which reflects that the curvature of the imaging surface is well controlled. Figure 15 As can be seen from the distortion diagram shown in (b), the lens assembly provided in Example 4 has relatively small distortion, which means that the image deformation caused by the main light beam is relatively small and the imaging distortion effect is low.

[0312] Therefore, the lens assembly provided in the fourth embodiment can achieve the goals of telephoto characteristics, miniaturization, compact structure and high imaging quality, while ensuring that the focusing unit GA, the anti-shake unit GO and the compensation unit GC are sufficiently lightweight.

[0313] Embodiment 5:

[0314] Figure 16 This is a structural diagram of the lens assembly provided in Example 5 of the present application. Figure 16 The structure and performance of the lens assembly provided in Example 5 of the present application are described.

[0315] like Figure 16 As shown, the lens assembly includes, along the optical axis, from the object side to the image side, a first optical path adjustment unit GP1, a focus unit GA, an anti-shake unit GO, a second optical path adjustment unit GP2, and a compensation unit GC. An aperture stop is positioned at the front of GP1, and a filter 600 is positioned on the image side of GC. The lens assembly provided in Example 5 has a length L = 42.22 mm and a width W = 24.13 m.

[0316] The object side has an object surface. The aperture stop surface is S1 (as shown in Table 5-1), and GP1 includes an object-side surface S2 and an image-side surface S3. The focusing unit GA includes two lenses, L1 and L2. Lens L1 includes an object-side surface S4 and an image-side surface S5; lens L2 includes an object-side surface S6 and an image-side surface S7. The anti-shake unit GO includes two lenses, L3 and L4. Lens L3 includes an object-side surface S8 and an image-side surface S9; lens L4 includes an object-side surface and an image-side surface S10. GP2 includes an object-side surface S11 and an image-side surface S12. The compensation unit GC includes two lenses, L5 and L6. Lens L5 includes an object-side surface S13 and an image-side surface S14; lens L6 includes an object-side surface and an image-side surface S15. The object-side surface of lens L6 is bonded to the image-side surface S14 of lens L5. The filter 600 includes an object-side surface S16 and an image-side surface S17. The image side has an image surface S0.

[0317] The object-side surface S2 of GP1 is convex at the optical axis, and the image-side surface S3 is flat at the circumference. In GA, the object-side surface S4 of lens L1 is flat at the circumference, 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. In GO, 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 object-side surface S11 and image-side surface S12 of GP2 are flat at the circumference. In GC, the object-side surface S13 of lens L5 is concave at the optical axis, and the image-side surface S14 is concave at the optical axis. The object-side surface S15 of lens L6 is convex at the optical axis, and the image-side surface S15 is flat at the circumference.

[0318] Table 5-1 shows the optical parameters of the lens assembly provided in Example 5; Table 5-2 shows the aspheric coefficients of the lens assembly provided in Example 5; Table 5-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Example 5; Table 5-4 shows the parameter relationship formulas of each component in the lens assembly provided in Example 5.

[0319] In some embodiments, the lens assembly can set the optical parameters of each component in the lens assembly according to the data shown in Table 5-1, Table 5-2, Table 5-3 and Table 5-4.

[0320] Table 5-1 Optical parameters of the lens assembly provided in Example 5

[0321]

[0322]

[0323] Table 5-2 Aspheric coefficients of the lens assembly provided in Example 5

[0324] Surface number S2 S4 S5 S6 S7 K 0 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A4 -0.003354028 -1.292693E-01 -1.921188E-01 -3.128533E-02 -1.450476E-02 A6 -5.34E-05 2.679223E-02 2.212206E-02 -1.162212E-02 -1.250223E-02 A8 1.69E-05 -8.773124E-03 -8.038206E-03 -7.626631E-05 -2.435483E-04 A10 -5.92E-06 3.687746E-03 3.840314E-03 -1.212186E-03 -1.742891E-03 A12 2.23E-06 -1.428287E-03 -1.164662E-03 -1.108635E-04 -1.872388E-04 A14 8.110442E-04 1.009397E-03 -2.284817E-04 -4.726177E-04 A16 -3.841688E-04 -3.787623E-04 -1.235412E-04 -8.759315E-05 A18 3.231017E-04 3.929468E-04 -1.631783E-04 -2.457555E-04 A20 1.291009E-06 7.225983E-04 5.499001E-04 -1.983218E-05 A22 A24 A26 A28 A30

[0325] Table 5-3 Relevant data of GA unit and GO unit in the lens assembly provided in Example 5

[0326]

[0327]

[0328] Table 5-4 Parameter relationship formula of each component in the lens assembly provided in Example 5

[0329] Conditional expression Value F#≤4.0 3.50 0.15<TGA / EPD<0.5 0.19 0.15<TGO / EPD<0.6 0.31 0.4<|FGA / F|<2.0 0.91 0.5<|FGO / F|<1.6 0.89 0.55<DGA / F^2×1000<1.05 0.64 0.8<|DGO / OA|<1.5 1.00 0.4<|FGC / F|<5.0 1.90 0.7<L / F<1 0.88 1.5<W / EPD<3 1.76

[0330] In Example 5, referring to Table 5-1, the effective focal length of the lens assembly is F=47.98 mm, the aperture number F# is 3.5, the field of view angle FOV is 8.3°, and the entrance pupil diameter EPD is 13.71 mm.

[0331] Filters 600, GP1, GP2, GA, GO, and GC can be made of glass or plastic, as shown in Table 1-1.

[0332] The surface types of the object plane, S1 to S17, and the image plane are spherical or aspherical, wherein the aspherical coefficients can be calculated based on the aspherical curve equation of the aforementioned embodiment.

[0333] See Table 1-2, which shows the aspheric coefficients of surfaces S2, S4 to S10 using the aspheric type. Among them, K is the conic coefficient in the aspheric curve equation, and A4, A6, ... A30 are the aspheric coefficients of the 4th to 30th order of each surface, corresponding to a1, a2, ... a in the aspheric curve equation. 13 .

[0334] See Table 1-3, the focal length of the GA unit FGA = 43.57 mm, the total thickness of the GA unit TGA = 2.652 mm, the focus movement stroke of the GA unit DGA = 1.47 mm, the focal length of the GO unit FGO = -42.62 mm, the total thickness of the GO unit TGO = 4.209 mm, the anti-shake translation amount of the GO unit DGO = -0.498 mm, the anti-shake angle OA = 0.5°, and the focal length of the GC unit FGC = -91.08 mm.

[0335] The total thickness TGA of the GA unit is the distance between the object-side surface S4 of the lens L1 and the image-side surface S7 of the lens L2, and the total thickness TGO of the GO unit is the distance between the object-side surface S8 of the lens L3 and the image-side surface S10 of the lens L4.

[0336] See Table 1-4, which shows the values of the parameter relationship formulas of each component in the lens assembly. Among them, 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=0.19; the relationship between the total thickness TGO of the anti-shake unit GO and the entrance pupil diameter EPD is TGO / EPD=0.31; 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|=0.91; the relationship between the focal length FGO of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=0.89; the focus unit The relationship between the focus movement stroke DGA of GA and the effective focal length F of the lens assembly is DGA / F^2×1000=0.64; the relationship between the anti-shake angle OA of the anti-shake unit GO and the anti-shake stroke DGO is |DGO / OA|=1; the relationship between the focal length FGC of the compensation unit GC and the effective focal length F of the lens assembly is |FGC / F|=1.9; the relationship between the length L of the lens assembly and the effective focal length F is L / F=0.88; the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD=1.76.

[0337] Figure 17 This is the field curvature diagram and distortion diagram of the lens assembly provided in Example 5 of the present application. Figure 17 (a) is a field curvature diagram of the lens assembly provided in Example 5 of the present application, Figure 17 The solid line in (a) is the meridian field curvature, Figure 17 The dotted line in (a) is the sagittal field curvature; Figure 17 (b) is a distortion diagram of the lens assembly provided in Example 5 of the present application.

[0338] Depend on Figure 17 From the field curvature diagram shown in (a), we can see that the sagittal field curvature and the meridional field curvature are both controlled within a relatively small range, which reflects that the curvature of the imaging surface is well controlled. Figure 17 As can be seen from the distortion diagram shown in (b), the lens assembly provided in Example 5 has relatively small distortion, which means that the image deformation caused by the main light beam is relatively small and the imaging distortion effect is low.

[0339] Therefore, the lens assembly provided in the fifth embodiment can achieve the goals of telephoto characteristics, miniaturization, compact structure and high imaging quality, while ensuring that the focusing unit GA, the anti-shake unit GO and the compensation unit GC are sufficiently lightweight.

[0340] Example 6:

[0341] Figure 18 This is a structural diagram of the lens assembly provided in Example 6 of the present application. Figure 18 The structure and performance of the lens assembly provided in Example 6 of the present application are described.

[0342] like Figure 18 As shown, the lens assembly includes, along the optical axis, from the object side to the image side, a first optical path adjustment unit GP1, a focus unit GA, an anti-shake unit GO, a second optical path adjustment unit GP2, and a compensation unit GC. An aperture stop is positioned at the front of GP1, and a filter 600 is positioned on the image side of GC. The lens assembly provided in Example 6 has a length L = 39.85 mm and a width W = 27.17 mm.

[0343] The object side has an object surface. The aperture stop surface is S1 (as shown in Table 6-1), and GP1 includes an object-side surface S2 and an image-side surface S3. The focusing unit GA includes three lenses: L1, L2, and L3. Lens L1 includes an object-side surface S4 and an image-side surface S5; lens L2 includes an object-side surface S6 and an image-side surface S6, with the object-side surface of lens L2 bonded to the image-side surface S5 of lens L1; lens L3 includes an object-side surface S7 and an image-side surface S7, with the object-side surface of lens L3 bonded to the image-side surface S6 of lens L2. The anti-shake unit GO includes two lenses: L4 and L5. Lens L4 includes an object-side surface S8 and an image-side surface S9; lens L5 includes an object-side surface S10 and an image-side surface S11. GP2 includes an object-side surface S12 and an image-side surface S13. The compensation unit GC includes two lenses: L6 and L7. 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. The optical filter 600 includes an object-side surface S18 and an image-side surface S19. The image-side surface has an image plane S0.

[0344] The object-side surface S2 of GP1 is convex at the optical axis, and the image-side surface S3 is flat at the circumference. In GA, the object-side surface S4 of lens L1 is flat at the circumference, and the image-side surface S5 is convex at the optical axis. The object-side surface S13 of lens L2 is concave at the optical axis, and the image-side surface S6 is concave at the optical axis. The object-side surface S8 of lens L4 is convex at the optical axis, and the image-side surface S7 is concave at the optical axis. In GO, the object-side surface S10 of lens L5 is convex at the optical axis, and the image-side surface S11 is concave at the optical axis. The object-side surface S11 and the image-side surface S12 of GP2 are flat at the circumference. In GC, the object-side surface S13 of lens L6 is flat at the circumference, and the image-side surface S14 is convex at the optical axis. The object-side surface S15 of the lens L7 is concave at the optical axis, and the image-side surface S16 is concave at the optical axis.

[0345] Table 6-1 shows the optical parameters of the lens assembly provided in Example 6; Table 6-2 shows the aspheric coefficients of the lens assembly provided in Example 6; Table 6-3 shows the relevant data of the GA unit and GO unit in the lens assembly provided in Example 6; Table 6-4 shows the parameter relationship formulas of each component in the lens assembly provided in Example 6.

[0346] In some embodiments, the lens assembly can set the optical parameters of each component in the lens assembly according to the data shown in Table 6-1, Table 6-2, Table 6-3 and Table 6-4.

[0347] Table 6-1 Optical parameters of the lens assembly provided in Example 6

[0348]

[0349]

[0350] Table 6-2 Aspheric coefficients of the lens assembly provided in Example 6

[0351]

[0352]

[0353] Table 6-3 Relevant data of GA unit and GO unit in the lens assembly provided in Example 6

[0354] Parameter name Parameter value FGA (GA unit focal length, mm) -72.29 TGA (GA unit thickness, mm) 4.688 DGA (AF stroke, mm) 2.400 FGO (focal length of GO unit, mm) 54.39 TGO (GO unit thickness, mm) 5.109 DGO (OIS translation, mm) 0.626 OA (OIS angle, degrees) 0.5 FGC (GC unit focal length, mm) -35.18

[0355] Table 6-4 Parameter relationship formula of each component in the lens assembly provided by Example 6

[0356] Conditional expression Value F#≤4.0 3.50 0.15<TGA / EPD<0.5 0.34 0.15<TGO / EPD<0.6 0.37 0.4<|FGA / F|<2.0 1.51 0.5<|FGO / F|<1.6 1.13 0.55<DGA / F^2×1000<1.05 1.04 0.8<|DGO / OA|<1.5 1.25 0.4<|FGC / F|<5.0 0.73 0.7<L / F<1 0.83 1.5<W / EPD<3 1.98

[0357] In Example 6, referring to Table 6-1, the effective focal length of the lens assembly is F=48.01 mm, the aperture number F# is 3.5, the field of view angle FOV is 8.3°, and the entrance pupil diameter EPD is 13.72 mm.

[0358] Filters 600, GP1, GP2, GA, GO, and GC can be made of glass or plastic, as shown in Table 1-1.

[0359] The surface types of the object plane, S1 to S19, and the image plane are spherical or aspherical, wherein the aspherical coefficients can be calculated based on the aspherical curve equation of the aforementioned embodiment.

[0360] See Table 1-2, which shows the aspheric coefficients of the aspheric surface types S2, S8 to S11. K is the conic coefficient in the aspheric curve equation, and A4, A6, ... A30 are the aspheric coefficients of the 4th to 30th order of each surface, corresponding to a1, a2, ... a in the aspheric curve equation. 13 .

[0361] See Table 1-3, the focal length of the GA unit FGA = -72.29mm, the total thickness of the GA unit TGA = 4.688mm, the focus movement stroke of the GA unit DGA = 2.4mm, the focal length of the GO unit FGO = 54.39mm, the total thickness of the GO unit TGO = 5.109mm, the anti-shake translation amount of the GO unit DGO = 0.626mm, the anti-shake angle OA = 0.5°, and the focal length of the GC unit FGC = -35.18mm.

[0362] The total thickness TGA of the GA unit is the distance between the object-side surface S4 of the lens L1 and the image-side surface S7 of the lens L3, and the total thickness TGO of the GO unit is the distance between the object-side surface S8 of the lens L4 and the image-side surface S11 of the lens L5.

[0363] See Table 1-4, which shows the values of the parameter relationships of each component in the lens assembly. Among them, 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=0.34; the relationship between the total thickness TGO of the anti-shake unit GO and the entrance pupil diameter EPD is TGO / EPD=0.37; 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|=1.51; the relationship between the focal length FGO of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=1.13; the relationship between the focal length FGA of the focusing unit GA and the effective focal length F of the lens assembly is |FGO / F|=1.13; The relationship between the focus movement stroke DGA and the effective focal length F of the lens assembly is DGA / F^2×1000=1.04; the relationship between the anti-shake angle OA of the anti-shake unit GO and the anti-shake stroke DGO is |DGO / OA|=1.25; the relationship between the focal length FGC of the compensation unit GC and the effective focal length F of the lens assembly is |FGC / F|=0.73; the relationship between the length L of the lens assembly and the effective focal length F is L / F=0.83; the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD=1.98.

[0364] Figure 19 This is the field curvature diagram and distortion diagram of the lens assembly provided in Example 6 of the present application. Figure 19 (a) is a field curvature diagram of the lens assembly provided in Example 6 of the present application, Figure 19 The solid line in (a) is the meridian field curvature, Figure 19 The dotted line in (a) is the sagittal field curvature; Figure 19 (b) is a distortion diagram of the lens assembly provided in Example 6 of the present application.

[0365] Depend on Figure 19 From the field curvature diagram shown in (a), we can see that the sagittal field curvature and the meridional field curvature are both controlled within a relatively small range, which reflects that the curvature of the imaging surface is well controlled. Figure 19 As can be seen from the distortion diagram shown in (b), the lens assembly provided in Example 6 has relatively small distortion, which means that the image deformation caused by the main light beam is relatively small and the imaging distortion effect is low.

[0366] Therefore, the lens assembly provided in the sixth embodiment can achieve the goals of telephoto characteristics, miniaturization, compact structure and high imaging quality, while ensuring that the focusing unit GA, the anti-shake unit GO and the compensation unit GC are sufficiently lightweight.

[0367] Embodiment seven:

[0368] Figure 20 This is a structural diagram of the lens assembly provided in Example 7 of this application. Figure 20 The structure and performance of the lens assembly provided in Example 7 of the present application are described.

[0369] like Figure 20 As shown, the lens assembly includes, along the optical axis, from the object side to the image side, a first optical path adjustment unit GP1, a focus unit GA, an anti-shake unit GO, a second optical path adjustment unit GP2, and a compensation unit GC. An aperture stop is provided at the front of GP1, and a filter 600 is provided on the image side of GC. The lens assembly provided in Example 7 has a length L = 40.73 mm and a width W = 32.95 mm.

[0370] The object side has an object surface. 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. The focusing unit GA includes two lenses, namely, lenses L1 and L2. Lens L1 includes an object-side surface S4 and an image-side surface S5; lens L2 includes an object-side surface S6 and an image-side surface S6, and the object-side surface of lens L2 is bonded to the image-side surface S5 of lens L1. The anti-shake unit GO includes two lenses, namely, lenses L3 and L4. 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. The compensation unit GC includes two groups, each group GC including two lenses, namely, lenses L5, L6, L7, and L8. Lenses L5 and L6 are bonded, and lenses L7 and L8 are bonded, with a gap between lenses L6 and L7. Lens L5 includes an object-side surface S13 and an image-side surface S14; lens L6 includes an object-side surface and an image-side surface S15, with the object-side surface of lens L6 being bonded to the image-side surface S14 of lens L5. Lens L7 includes an object-side surface S16 and an image-side surface S17; lens L8 includes an object-side surface and an image-side surface S18, with the object-side surface of lens L8 being bonded to the image-side surface S17 of lens L7. Filter 600 includes an object-side surface S19 and an image-side surface S20. The image side has an image surface.

[0371] The object-side surface S2 of GP1 is convex at the optical axis, and the image-side surface S3 is flat at the circumference. In GA, 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 S7 of lens L2 is convex at the optical axis, and the image-side surface S6 is concave at the optical axis. In GO, the object-side surface S7 of lens L3 is flat at the circumference, and the image-side surface S8 is convex at the optical axis. The object-side surface S9 of lens L4 is concave at the optical axis, and the image-side surface S10 is concave at the optical axis. The object-side surface S11 and the image-side surface S12 of GP2 are flat at the circumference. In GC, the object-side surface S13 of lens L5 is convex 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 concave at the optical axis, and the image-side surface S14 is convex at the optical axis. The object-side surface S15 of lens L7 is concave at the optical axis, and the image-side surface S16 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 S18 is concave at the optical axis.

[0372] Table 7-1 shows the optical parameters of the lens assembly provided in Example 7; Table 7-2 shows the aspheric coefficients of the lens assembly provided in Example 7; Table 7-3 shows the relevant data of the GA unit and the GO unit in the lens assembly provided in Example 7; Table 7-4 shows the parameter relationship formulas of the various components in the lens assembly provided in Example 7.

[0373] In some embodiments, the lens assembly can set the optical parameters of each component in the lens assembly according to the data shown in Table 7-1, Table 7-2, Table 7-3 and Table 7-4.

[0374] Table 7-1 Optical parameters of the lens assembly provided in Example 7

[0375]

[0376]

[0377] Table 7-2 Aspheric coefficients of the lens assembly provided in Example 7

[0378] Surface number S2 S7 S8 S9 S10 K -6.081505667 1.020756E-01 1.314841E-01 1.514009E-01 1.421393E-03 A4 0.0327084 4.440513E-03 -1.122236E-02 -4.070575E-03 4.914699E-03 A6 -0.000362103 4.750835E-03 -1.249720E-03 -1.004085E-03 -1.276497E-04 A8 -7.71E-06 5.537894E-03 2.054635E-03 1.306139E-03 8.991312E-06 A10 6.47E-06 5.004245E-03 1.120883E-03 -7.963615E-04 -3.697112E-04 A12 -2.89E-06 3.250990E-03 5.377392E-04 -6.439193E-04 -1.549747E-04 A14 2.50E-06 1.745279E-03 6.733516E-04 -5.225976E-05 -1.745910E-05 A16 -8.77E-07 5.876103E-04 3.533379E-04 8.880596E-06 5.092935E-05 A18 1.33E-06 5.899410E-05 3.995728E-04 1.669156E-04 7.362040E-05 A20 -2.030461E-04 -1.177364E-04 -2.447576E-04 3.905725E-05 A22 -1.917844E-04 -2.110261E-04 -1.530092E-04 3.374889E-05 A24 -4.262590E-05 -2.313636E-05 9.846202E-06 1.732866E-05 A26 A28 A30

[0379] Table 7-3 Relevant data of GA unit and GO unit in the lens assembly provided in Example 7

[0380]

[0381]

[0382] Table 7-4 Parameter relationship formula of each component in the lens assembly provided by Example 7

[0383] Conditional expression Value F#≤4.0 4.00 0.15<TGA / EPD<0.5 0.50 0.15<TGO / EPD<0.6 0.50 0.4<|FGA / F|<2.0 2.00 0.5<|FGO / F|<1.6 0.50 0.55<DGA / F^2×1000<1.05 0.76 0.8<|DGO / OA|<1.5 0.96 0.4<|FGC / F|<5.0 5.00 0.7<L / F<1 0.85 1.5<W / EPD<3 2.75

[0384] In Example 7, referring to Table 7-1, the effective focal length of the lens assembly is F=47.92 mm, the aperture number F# is 4.0, the field of view angle FOV is 8.29°, and the entrance pupil diameter EPD is 11.98 mm.

[0385] Filters 600, GP1, GP2, GA, GO, and GC can be made of glass or plastic, as shown in Table 1-1.

[0386] The surface types of the object planes S1 to S20 and the image plane S0 are spherical or aspherical, wherein the aspherical coefficients can be calculated based on the aspherical curve equation of the aforementioned embodiment.

[0387] See Table 1-2, which shows the aspheric coefficients of the aspheric surface types S2, S7 to S10. K is the conic coefficient in the aspheric curve equation, and A4, A6, ... A30 are the aspheric coefficients of the 4th to 30th order of each surface, corresponding to a1, a2, ... a in the aspheric curve equation. 13 .

[0388] See Table 1-3, the focal length of the GA unit FGA = 95.84mm, the total thickness of the GA unit TGA = 5.983mm, the focus movement stroke of the GA unit DGA = 1.748mm, the focal length of the GO unit FGO = -24mm, the total thickness of the GO unit TGO = 5.983mm, the anti-shake translation amount of the GO unit DGO = 0.482mm, the anti-shake angle OA = 0.5°, and the focal length of the GC unit FGC = 239.61mm.

[0389] The total thickness TGA of the GA unit is the distance between the object-side surface S4 of the lens L1 and the image-side surface S6 of the lens L2, and the total thickness TGO of the GO unit is the distance between the object-side surface S7 of the lens L3 and the image-side surface S10 of the lens L4.

[0390] See Table 1-4, which shows the values of the parameter relationship of each component in the lens assembly. Among them, the aperture value F# of the lens assembly is 4; the relationship between the total thickness TGA of the focusing unit GA and the entrance pupil diameter EPD is TGA / EPD=0.5; the relationship between the total thickness TGO of the anti-shake unit GO and the entrance pupil diameter EPD is TGO / EPD=0.5; 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|=2; the relationship between the focal length FGO of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=0.5; the relationship between the focal length FGA of the focusing unit GA ... anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=0.5; 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|=0.5. The relationship between the focal movement stroke DGA and the effective focal length F of the lens assembly is DGA / F^2×1000=0.76; the relationship between the anti-shake angle OA of the anti-shake unit GO and the anti-shake stroke DGO is |DGO / OA|=0.96; the relationship between the focal length FGC of the compensation unit GC and the effective focal length F of the lens assembly is |FGC / F|=5; the relationship between the length L of the lens assembly and the effective focal length F is L / F=0.85; the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD=2.75.

[0391] Figure 21 This is the field curvature diagram and distortion diagram of the lens assembly provided in Example 7 of the present application. Figure 21 (a) is a field curvature diagram of the lens assembly provided in Example 7 of the present application, Figure 21 The solid line in (a) is the meridian field curvature, Figure 21 The dotted line in (a) is the sagittal field curvature; Figure 21 (b) is a distortion diagram of the lens assembly provided in Example 7 of the present application.

[0392] Depend on Figure 21 From the field curvature diagram shown in (a), we can see that the sagittal field curvature and the meridional field curvature are both controlled within a relatively small range, which reflects that the curvature of the imaging surface is well controlled. Figure 21As can be seen from the distortion diagram in (b), the lens assembly provided in Example 7 has relatively small distortion, which means that the image deformation caused by the main light beam is relatively small and the imaging distortion effect is low.

[0393] Therefore, the lens assembly provided in the seventh embodiment can achieve the goals of telephoto characteristics, miniaturization, compact structure and high imaging quality, while ensuring that the focusing unit GA, the anti-shake unit GO and the compensation unit GC are sufficiently lightweight.

[0394] Embodiment 8:

[0395] Figure 22 This is a schematic diagram of the structure of the lens assembly provided in Example 8 of the present application. Figure 22 The structure and performance of the lens assembly provided in Example 8 of the present application are described.

[0396] like Figure 22 As shown, the lens assembly includes, along the optical axis, from the object side to the image side, a first optical path adjustment unit GP1, a focus unit GA, an anti-shake unit GO, a second optical path adjustment unit GP2, and a compensation unit GC. An aperture stop is positioned at the front of GP1, and a filter 600 is positioned on the image side of GC. The lens assembly provided in Example 8 has a length L = 40.8 mm and a width W = 20.98 mm.

[0397] The object side has an object surface. The aperture stop surface is S1 (as shown in Table 8-1), and GP1 includes an object-side surface S2 and an image-side surface S3. The focusing unit GA includes three lenses: L1, L2, and L3. Lens L1 includes an object-side surface S4 and an image-side surface S5; lens L2 includes an object-side surface S6 and an image-side surface S6, with the object-side surface of lens L2 bonded to the image-side surface S5 of lens L1; lens L3 includes an object-side surface S7 and an image-side surface S7, with the object-side surface of lens L3 bonded to the image-side surface S6 of lens L2. The anti-shake unit GO includes two lenses: L4 and L5. Lens L4 includes an object-side surface S8 and an image-side surface S9. Lens L5 includes an object-side surface S10 and an image-side surface S11. GP2 includes an object-side surface S12 and an image-side surface S13. The compensation unit GC includes three lenses: L6, L7, and L8. 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 600 includes an object-side surface S20 and an image-side surface S21. The image side has an image surface S0.

[0398] The object side surface S2 of GP1 is convex at the optical axis, and the image side surface S3 is flat at the circumference. In GA, the object side surface S4 of lens L1 is concave at the optical axis, and the image side surface S5 is convex at the optical axis. The object side surface S6 of lens L2 is concave at the optical axis, and the image side surface S7 is concave at the optical axis. In GO, the object side surface S8 of lens L4 is convex at the optical axis, and the image side surface S9 is concave at the optical axis. The object side surface S10 of lens L5 is convex at the optical axis, and the image side surface S11 is concave at the optical axis. The object side surface S12 and image side surface S13 of GP2 are flat at the circumference. In GC, the object side surface S14 of lens L6 is concave 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 convex at the optical axis, and the image-side surface S17 is concave at the optical axis. The object-side surface S18 of lens L8 is convex at the optical axis, and the image-side surface S19 is concave at the optical axis.

[0399] Table 8-1 shows the optical parameters of the lens assembly provided in Example 8; Table 8-2 shows the aspheric coefficients of the lens assembly provided in Example 8; Table 8-3 shows the relevant data of the GA unit and the GO unit in the lens assembly provided in Example 8; Table 8-4 shows the parameter relationship formulas of the various components in the lens assembly provided in Example 8.

[0400] In some embodiments, the lens assembly can set the optical parameters of each component in the lens assembly according to the data shown in Table 8-1, Table 8-2, Table 8-3 and Table 8-4.

[0401] Table 8-1 Optical parameters of the lens assembly provided in Example 8

[0402]

[0403]

[0404] Table 8-2 Aspheric coefficients of the lens assembly provided in Example 8

[0405]

[0406]

[0407] Table 8-3 Relevant data of GA unit and GO unit in the lens assembly provided in Example 8

[0408]

[0409]

[0410] Table 8-4 Parameter relationship of each component in the lens assembly provided in Example 8

[0411] Conditional expression Value F#≤4.0 3.50 0.15<TGA / EPD<0.5 0.34 0.15<TGO / EPD<0.6 0.56 0.4<|FGA / F|<2.0 1.47 0.5<|FGO / F|<1.6 1.59 0.55<DGA / F^2×1000<1.05 1.04 0.8<|DGO / OA|<1.5 1.50 0.4<|FGC / F|<5.0 1.59 0.7<L / F<1 0.85 1.5<W / EPD<3 1.53

[0412] In Example 8, referring to Table 8-1, the effective focal length of the lens assembly is F=48 mm, the aperture number F# is 3.5, the field of view angle FOV is 9.43°, and the entrance pupil diameter EPD is 13.71 mm.

[0413] Filters 600, GP1, GP2, GA, GO, and GC can be made of glass or plastic, as shown in Table 1-1.

[0414] The surface types of the object plane, S1 to S21, and the image plane are spherical or aspherical, wherein the aspherical coefficients can be calculated based on the aspherical curve equation of the aforementioned embodiment.

[0415] See Table 1-2, which shows the aspheric coefficients of the surfaces S2, S8 to S11, S14 to S19 using the aspheric type. Among them, K is the conic coefficient in the aspheric curve equation, and A4, A6, ... A30 are the aspheric coefficients of the 4th to 30th order of each surface, corresponding to a1, a2, ... a in the aspheric curve equation. 13 .

[0416] See Table 1-3, the focal length of the GA unit FGA = -70.46mm, the total thickness of the GA unit TGA = 4.72mm, the focus movement stroke of the GA unit DGA = 2.4mm, the focal length of the GO unit FGO = 76.4mm, the total thickness of the GO unit TGO = 7.748mm, the anti-shake translation amount of the GO unit DGO = 0.75mm, the anti-shake angle OA = 0.5°, and the focal length of the GC unit FGC = -76.43mm.

[0417] The total thickness TGA of the GA unit is the distance between the object-side surface S4 of the lens L1 and the image-side surface S7 of the lens L3, and the total thickness TGO of the GO unit is the distance between the object-side surface S8 of the lens L4 and the image-side surface S11 of the lens L5.

[0418] See Table 1-4, which shows the values of the parameter relationship formulas of each component in the lens assembly. Among them, 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=0.34; the relationship between the total thickness TGO of the anti-shake unit GO and the entrance pupil diameter EPD is TGO / EPD=0.56; 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|=1.47; the relationship between the focal length FGO of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=1.59; the relationship between the focal length FGA of the focusing unit GA and the effective focal length F of the lens assembly is |FGO / F|=1.59; the relationship between the focal length FGA of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=1.59; the relationship between the focal length FGA of the focusing unit GA and the entrance pupil diameter EPD is TGO / EPD=0.56; 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|=1.47; the relationship between the focal length FGO of the anti-shake unit GO and the effective focal length F of the lens assembly is |FGO / F|=1.59; the relationship between the focal length FGA of the focusing unit GA and the entrance pupil diameter EPD is TGO / EPD=0.56. The relationship between the focus movement stroke DGA of A and the effective focal length F of the lens assembly is DGA / F^2×1000=1.04; the relationship between the anti-shake angle OA of the anti-shake unit GO and the anti-shake stroke DGO is |DGO / OA|=1.5; the relationship between the focal length FGC of the compensation unit GC and the effective focal length F of the lens assembly is |FGC / F|=1.59; the relationship between the length L of the lens assembly and the effective focal length F is L / F=0.85; the relationship between the width W of the lens assembly and the entrance pupil diameter EPD is W / EPD=1.53.

[0419] Figure 23 : This is the field curvature diagram and distortion diagram of the lens assembly provided in Example 8 of the present application. Figure 23 (a) is a field curvature diagram of the lens assembly provided in Example 8 of the present application, Figure 23 The solid line in (a) is the meridian field curvature, Figure 23 The dotted line in (a) is the sagittal field curvature; Figure 23 (b) is a distortion diagram of the lens assembly provided in Example 8 of the present application.

[0420] Depend on Figure 23 From the field curvature diagram shown in (a), we can see that the sagittal field curvature and the meridional field curvature are both controlled within a relatively small range, which reflects that the curvature of the imaging surface is well controlled. Figure 23 As can be seen from the distortion diagram shown in (b), the lens assembly provided in Example 8 has relatively small distortion, which means that the image deformation caused by the main light beam is relatively small and the imaging distortion effect is low.

[0421] Therefore, the lens assembly provided in the eighth embodiment can achieve the goals of telephoto characteristics, miniaturization, compact structure and high imaging quality, while ensuring that the focusing unit GA, the anti-shake unit GO and the compensation unit GC are sufficiently lightweight.

[0422] An embodiment of the present application also provides a camera module, including: a lens barrel, a focus motor, an anti-shake motor, a compensation motor, an image sensor, a circuit board, and the lens assembly provided by any of the aforementioned embodiments, etc. The structure of the camera module is not shown in the figure.

[0423] The focus motor is mounted outside the focus unit 300 and is used to adjust the position of the focus unit 300 to achieve focus for capturing objects at different distances. The anti-shake motor is mounted outside the anti-shake unit 400 and is used to adjust the position of the anti-shake unit 400 to prevent blurring of the captured image due to factors such as user hand tremors. The compensation motor is mounted outside the compensation unit 500 and is used to adjust the position of the compensation unit 500 to compensate for aberration changes caused by movement of the focus unit 300 and / or the anti-shake unit 400, thereby improving image quality.

[0424] The image sensor is located on the circuit board and is electrically connected to the circuit board via metal flying leads. The lens barrel is mounted outside the lens assembly, focus motor, anti-shake motor, and compensation motor, and snaps onto the image sensor so that the image sensor is located on the image side of the lens assembly. The filter 600 is located between the lens assembly and the image sensor. The filter 600 is configured to receive light emitted by the lens assembly, filter it, and 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 600 and is configured to perform photoelectric conversion on the light processed by the filter 600 for imaging.

[0425] Exemplarily, the image sensor may be a complementary metal-oxide semiconductor (CMOS) image sensor or a charge coupled device (CCD) image sensor.

[0426] When photographing an object, light enters the lens assembly from the light-entering side, which acts as a convergent light source. After passing through the aperture, the light is reflected by the first optical path adjustment unit 100, where it changes its path and passes through the zoom unit 300 and the anti-shake unit 400 before being transmitted to the second optical path adjustment unit 200. The light is reflected twice by the second optical path adjustment unit 200, changing its path again and entering the zoom unit 300. The light then passes through the compensation unit 500 and enters the filter 600, where it filters out unwanted light waves. The light then converges onto the light-receiving surface of the image sensor. The image sensor utilizes the photoelectric conversion function of optoelectronic devices to convert the light image on its light-receiving surface into an electrical signal proportional to the light image, thereby forming an image.

[0427] The camera module provided in the embodiment of the present application reasonably sets the optical parameters of each component in the lens assembly, which not only reduces the requirements for the driving stroke and accuracy of the focus motor, anti-shake motor and compensation motor, and ensures that the focus unit 300, anti-shake unit 400 and compensation unit 500 are sufficiently lightweight; it can also achieve telephoto characteristics and improve imaging 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 lightweight development of the electronic device.

[0428] Figure 24 This is a structural diagram of a camera module provided in an embodiment of the present application located in an electronic device.

[0429] Combine Figure 1 and Figure 24 An embodiment of the present application further provides an electronic device, comprising: a display screen 10, a middle frame 20, a rear cover 30, and the camera module 50 provided in the aforementioned embodiment.

[0430] The display screen 10 and rear housing 30 are located on opposite sides of the middle frame 20. The display screen 10, middle frame 20, and rear housing 30 snap together to form the entire device cavity. This cavity contains components such as the communication module, circuit board, battery, speaker assembly, and camera module, which are not listed here.

[0431] The rear housing 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 optical path adjustment unit 100 in the lens assembly is adjacent to the rear housing 30 .

[0432] The electronic device provided in the embodiments of the present application includes a camera module. The camera module is small in size, which can reduce the internal space occupied by the electronic device, thereby achieving the development of lightweight and thin electronic devices. In addition, the camera module has high imaging quality, which can improve the imaging performance of the electronic device.

[0433] It should be noted that those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope of this application is indicated by the following claims.

[0434] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A lens assembly, characterized in that: include: A first optical path adjustment unit (100) is configured to control a first light from the object side to propagate along a first direction; a second light path adjustment unit (200) located on the light exit side of the first light path adjustment unit (100); the second light path adjustment unit (200) is configured to control the first light to propagate to the image side along a second direction, the second direction being different from the first direction; a focusing unit (300), located along the optical path of the first light ray, the focusing unit (300) being configured to move along the direction of the optical axis of the lens assembly to perform optical focusing; an anti-shake unit (400), located along the optical path of the first light, the anti-shake unit (400) being configured to move in a direction perpendicular to the optical axis to perform optical anti-shake; A compensation unit (500) is located along the optical path of the first light ray, and the compensation unit (500) is configured to compensate for aberration changes caused by the movement of the focusing unit (300) and / or the anti-shake unit (400).

2. The lens assembly according to claim 1, wherein: The focal length FGA of the focusing unit (300) and the effective focal length F of the lens assembly satisfy the following: 0.4<|FGA / F|<2.

0.

3. The lens assembly according to claim 1, wherein: The focal length FGO of the anti-shake unit (400) and the effective focal length F of the lens assembly satisfy the following: 0.5<|FGO / F|<1.

6.

4. The lens assembly according to claim 1, wherein: The focal length FGC of the compensation unit (500) and the effective focal length F of the lens assembly satisfy the following: 0.4<|FGC / F|<5.

0.

5. The lens assembly according to claim 1, wherein: The aperture value F# of the lens assembly satisfies: F#≤4.

6. The lens assembly according to claim 1, wherein: The total thickness TGA of the focusing unit (300) and the entrance pupil diameter EPD of the lens assembly satisfy: 0.15 <TGA / EPD<0.5。 7. The lens assembly according to claim 1, wherein: The total thickness TGO of the anti-shake unit (400) and the entrance pupil diameter EPD of the lens assembly satisfy: 0.15 <TGO / EPD<0.6。 8. The lens assembly according to claim 1, wherein: The focusing movement stroke DGA of the focusing unit (300) and the effective focal length F of the lens assembly satisfy the following conditions: 0.55 <DGA / F^2×1000<1.05。 9. The lens assembly according to claim 1, wherein: The anti-shake angle OA and the anti-shake stroke DGO of the anti-shake unit (400) satisfy the following conditions: 0.8<|DGO / OA|<1.

5.

10. The lens assembly according to claim 1, wherein: 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: 0.7 <L / F<1。 11. The lens assembly according to claim 1, wherein: 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: 1.5 <W / EPD<3。 12. The lens assembly according to claim 1, wherein: The focusing unit (300) comprises a plurality of lenses, and the plurality of lenses of the focusing unit (300) are distributed in sequence along the optical path of the first light; The anti-shake unit (400) comprises a plurality of lenses, and the plurality of lenses of the anti-shake unit (400) are sequentially distributed along the optical path of the first light; The compensation unit (500) comprises a plurality of lenses, and the plurality of lenses of the compensation unit (500) are distributed in sequence along the optical path of the first light.

13. The lens assembly according to claim 1, wherein: The first optical path adjustment unit (100) comprises a first reflecting surface (101); The first reflecting surface (101) is configured to receive a first light ray from the object side and reflect the first light ray to control the first light ray to propagate along the first direction, which is different from the incident direction of the first light ray.

14. The lens assembly according to claim 1, wherein: The second optical path adjustment unit (200) comprises a second reflection surface (201) and a third reflection surface (202), the second reflection surface (201) faces the first optical path adjustment unit (100), and the third reflection surface (202) faces the image side; The second reflecting surface (201) is configured to receive the first light propagating along the first direction and perform a first reflection on the first light to control the first light to propagate to the third reflecting surface (202); The third reflecting surface (202) is configured to perform a second reflection on the first light after the first reflection, so as to control the first light to propagate along the second direction to the image side.

15. A camera module, characterized in that: include: A filter, an image sensor, and a lens assembly according to any one of claims 1 to 14; The optical filter is located on the light-emitting side of the lens assembly, and the optical 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 is configured to perform photoelectric conversion on the light processed by the filter for imaging.

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

Images