camera device

Abstract

The application provides a lens set, wherein sequentially from a light incident end to a light exit end of the lens set, the lens set comprises: a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens; and an eighth lens; wherein a ratio of a combined focal length fg2 of the fifth lens and the sixth lens to a total focal length f of the lens set is 0.79<fg2 / f<0.98; and TTL values of the lens set at a near focus and at infinity are constant.

Description

Technical Field

[0001] This application relates to the field of camera module technology, and more particularly to a lens assembly, optical components, and camera module with internal focusing and optical image stabilization. Background Technology

[0002] With the rapid development of portable electronic devices such as smartphones and tablets, unlike the single or dual-camera setups of the past, high-end or flagship phones now typically use multiple lenses, including large-sensor, ultra-wide-angle, and telephoto lenses. The combination of these higher-specification lenses has greatly improved the imaging capabilities and competitive advantage of mobile phone lenses. Large-sensor lenses offer higher resolution, and their ultra-thin design allows for better compatibility with smartphones, meeting portability requirements that traditional camera lenses can no longer satisfy.

[0003] Optical lenses are an essential component of camera modules, converging incident light to create an image. In recent years, as users' demands for image quality have increased, the pixel count of camera modules has also been continuously improving. Simultaneously, to enhance image quality, the size of the image sensor has increased accordingly, thus placing higher demands on the design of compatible optical lenses. Existing integrated optical lenses in camera modules consist of a lens barrel and multiple lenses housed within it. However, due to technological limitations in the design and assembly methods of integrated optical lenses, existing lenses exhibit a significant difference in TTL (TTL: the distance on the optical axis from the surface of the first lens 11 near the light incident end to the imaging surface of the camera lens) values ​​at near-focal distance and infinity, hindering the reduction of the overall length of the optical lens.

[0004] How to reduce the difference in TTL values ​​between near-focus and infinity is still a technical problem that urgently needs to be solved. Summary of the Invention

[0005] To address the aforementioned problems, the present invention provides a lens assembly, characterized in that, from the light incident end to the light emitting end of the lens assembly, it sequentially comprises: a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens; and an eighth lens; wherein the ratio of the combined focal length fg2 of the fifth lens and the sixth lens to the total focal length f of the lens assembly is: 0.79 < fg2 / f < 0.98; and the TTL value of the lens assembly remains unchanged at near focus and at infinity.

[0006] In one embodiment, the focal length of the middle lens group composed of the fifth lens and the sixth lens satisfies fg2: 6.06 < fg2 < 7.21.

[0007] In one embodiment, the TTL of the lens group and half the diagonal length of the effective pixel area on the imaging surface of the lens group, ImgH, satisfy the following condition: 1.12 < TTL / ImgH < 1.36.

[0008] In one embodiment, the focal length f1 of the first lens 11 satisfies the following relationship with the total effective focal length f of the lens group: 0.51 <f / f1<0.86。

[0009] In one embodiment, the radius of curvature r7 of the object-side surface of the fourth lens and the radius of curvature r8 of the image-side surface of the fourth lens satisfy the following relationship: -0.38 <r7 / r8<4.134。

[0010] In one embodiment, the focal length f1 of the first lens satisfies the following relationship with the total effective focal length f of the lens group: 0.51 <f / f1<0.86。

[0011] In one embodiment, the focal length f8 of the eighth lens and the radius of curvature r16 of the image side surface of the eighth lens satisfy the following condition: -1.63 < f8 / r16 < -0.96.

[0012] In one embodiment, the focal length f2 of the second lens 12 and the focal length f6 of the sixth lens image satisfy the following condition: -10.4 < f2 / f6 < 18.4.

[0013] In one embodiment, the optical back focal length bfl of the lens group and half the diagonal length imgh of the effective pixel area on the imaging plane of the lens group satisfy the following condition: 0.078 < bfl / imgh < 0.083.

[0014] An optical component, comprising: A drive assembly; and the lens assembly, wherein a portion of the lens assembly is disposed within the drive assembly.

[0015] A camera module, comprising: Photosensitive components; and The optical component is mounted above the photosensitive component and is positioned along the optical path of the photosensitive component.

[0016] The further objectives and advantages of this application will become fully apparent from the following description and accompanying drawings.

[0017] These and other objects, features and advantages of this application are fully apparent from the following detailed description, the accompanying drawings and the claims. Attached Figure Description

[0018] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0019] Figure 1 A schematic diagram of the structure of the optical imaging lens of Embodiment 1 of this application is shown.

[0020] Figure 2 An on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown.

[0021] Figure 3 The distortion curve of the optical imaging lens of Embodiment 1 is shown.

[0022] Figure 4 A schematic diagram of the structure of the optical imaging lens of Embodiment 2 of this application is shown.

[0023] Figure 5 An on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown.

[0024] Figure 6 The distortion curve of the optical imaging lens in Embodiment 2 is shown.

[0025] Figure 7 A schematic diagram of the structure of the optical imaging lens of Embodiment 3 of this application is shown.

[0026] Figure 8 An on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown.

[0027] Figure 9 The distortion curve of the optical imaging lens in Embodiment 3 is shown.

[0028] Figure 10 A schematic diagram of the structure of the optical imaging lens of Embodiment 4 of this application is shown.

[0029] Figure 11 An on-axis chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown.

[0030] Figure 12 The distortion curve of the optical imaging lens of Embodiment 4 is shown.

[0031] Figure 13 A schematic diagram of the module structure of this application is shown. Detailed Implementation

[0032] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is obvious that the described embodiments are merely some embodiments of the present invention, and not all embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0033] In the description of this invention, it should be noted that directional terms such as "center," "lateral," "longitudinal," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0034] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0035] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0036] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection, a contact connection, or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] This application provides a lens assembly 10, which is composed of multiple lenses. The lens assembly 10 may include eight lenses with optical power, namely a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a seventh lens 17, and an eighth lens 18. These eight lenses are arranged sequentially along the optical axis from the object side to the image side. Any two adjacent lenses among the first lens 11 to the eighth lens 18 may have a gap distance.

[0038] The lens assembly 10 according to the above embodiments of this application can employ multiple lenses, such as the eight lenses described above. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, the size of the lens assembly 10 can be effectively reduced and its manufacturability improved, making the lens assembly 10 more suitable for manufacturing and applicable to portable electronic products. The lens assembly 10 configured as described above can have characteristics such as large aperture, large image plane, ultra-thinness, and good image quality.

[0039] In embodiments of this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface; that is, at least one mirror surface from the object-side surface of the first lens 11 to the image-side surface of the eighth lens 18 is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, at least one of the object-side and image-side surfaces of each of the first lens 11, second lens 12, third lens 13, fourth lens 14, fifth lens 15, sixth lens 16, seventh lens 17, and eighth lens 18 is an aspherical mirror surface. Optionally, the object-side and image-side surfaces of each of the first lens 11, second lens 12, third lens 13, fourth lens 14, fifth lens 15, sixth lens 16, seventh lens 17, and eighth lens 18 are aspherical mirror surfaces. However, those skilled in the art will understand that the number of lenses constituting the lens group 10 can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although eight lenses are described as an example in the embodiment, the lens group 10 is not limited to including eight lenses. If desired, the lens group 10 may also include other numbers of lenses.

[0040] In an exemplary embodiment, the upper lens group 101 is composed of the first lens 11, the second lens 12, the third lens 13 and the fourth lens 14, the middle lens group 102 is composed of the fifth lens 15 and the sixth lens 16, and the lower lens group 103 is composed of the seventh lens 17 and the eighth lens 18.

[0041] In an exemplary embodiment, the first lens 11 may have positive optical power; the second lens 12 may have positive or negative optical power; the third lens 13 may have positive optical power; the fourth lens 14 may have negative optical power; the fifth lens 15 may have positive or negative optical power; the sixth lens 16 may have positive optical power; the seventh lens 17 may have negative optical power; and the eighth lens 18 may have negative optical power.

[0042] In an exemplary embodiment, the lens assembly 10 according to this application satisfies the following condition: the TTL value of the lens assembly 10 remains unchanged at near-focus and at infinity, where TTL is the distance along the optical axis from the surface of the first lens 11 near the light incident end to the imaging surface of the camera lens. Satisfying that the TTL value of the lens assembly 10 remains unchanged at near-focus and at infinity is beneficial for minimizing the overall length of the lens while ensuring image quality, thus contributing to the achievement of an ultra-thin imaging lens.

[0043] In an exemplary embodiment, the lens group 10 according to this application satisfies: 8.00mm ≤ ImgH, where ImgH is half the diagonal length of the effective pixel area on the imaging plane of the lens group 10. Satisfying 8.00mm ≤ ImgH is beneficial for achieving the characteristic of a large image plane.

[0044] In an exemplary embodiment, the lens group 10 according to this application satisfies: 0.094 < 1 / fg1 < 0.12. Wherein, 1 / fg1 is the optical power of the upper lens group, satisfying: 0.094 < 1 / fg1 < 0.12. This can correct system aberrations to meet image quality requirements at different object distances.

[0045] In an exemplary embodiment, the lens group 10 according to this application satisfies: 0.14 < 1 / fg2 < 0.16. Wherein, 1 / fg2 is the optical power of the upper lens group, satisfying: 0.14 < 1 / fg2 < 0.16. This can correct system aberrations to meet image quality requirements at different object distances.

[0046] In an exemplary embodiment, the lens group 10 according to this application satisfies: -0.266 < 1 / fg3 < -0.25. Wherein, 1 / fg3 is the optical power of the upper lens group, satisfying -0.266 < 1 / fg3 < -0.25. This can correct system aberrations to meet image quality requirements at different object distances.

[0047] In an exemplary embodiment, the lens assembly 10 according to this application satisfies: 1.12 < TTL / ImgH < 1.36, where TTL is the distance along the optical axis from the surface of the first lens 11 near the light incident end to the imaging surface of the camera lens, and ImgH is half the diagonal length of the effective pixel area on the imaging surface of the lens assembly 10. Satisfying 1.12 < TTL / ImgH < 1.36 allows the lens assembly 10 to achieve good image quality while maintaining a relatively thin overall length, reducing design complexity. Simultaneously, it facilitates minimizing the overall length of the lens while ensuring image quality, thus contributing to the achievement of an ultra-thin imaging lens.

[0048] In an exemplary embodiment, the lens group 10 according to the present application can satisfy: 6.06<fg2<7.21, where fg2 is the focal length of the middle lens group 102 composed of the fifth lens 15 and the sixth lens 16. Satisfying 6.06<fg2<7.21 can change the object-image characteristics of the optical system by moving the middle lens group, and improve the close-range performance of the optical system.

[0049] In an exemplary embodiment, the lens group 10 according to the present application can satisfy: -0.38<r7 / r8<4.134, where r7 and r8 are the front and rear curvature radii of the fourth lens 14 respectively. Satisfying -0.38<r7 / r8<4.134 can optimize the convergence degree of light rays in the fourth lens 14, reduce the sensitivity of the fourth lens 14, and improve the finished product yield of the fourth lens 14.

[0050] In an exemplary embodiment, the lens group 10 according to the present application can satisfy: 0.51<f / f1<0.86, where f1 is the focal length of the first lens 11, and f is the total effective focal length of the lens group 10. Satisfying 0.51<f / f1<0.86 is beneficial for light rays with a large field of view to enter the first lens 11, and facilitates the first lens 11 to correct off-axis aberrations generated by other lenses, thereby helping to improve the imaging quality of the lens.

[0051] In an exemplary embodiment, the lens group 10 according to the present application can satisfy: -1.63<f8 / r16<-0.96, where f8 is the focal length of the eighth lens 18, and r16 is the curvature radius of the image side surface of the eighth lens 18. Satisfying -1.63<f8 / r16<-0.96 can effectively improve the geometric morphology of the fourth lens 14, control the exit angle of light rays from the fourth lens 14, and reduce the influence of ghost images.

[0052] In an exemplary embodiment, the lens group 10 according to the present application can satisfy: -10.4<f2 / f6<18.4, where f2 is the focal length of the second lens 12, and f6 is the image focal length of the sixth lens 16. Satisfying -10.4<f2 / f6<18.4 can increase the degree of freedom for surface variation of the second lens 12 and the third lens 13, so as to improve the ability of the imaging lens to correct astigmatism and field curvature.

[0053] In an exemplary embodiment, the lens group 10 according to the present application can satisfy: 0.078<bfl / imgh<0.083, where bfl is the optical back focal length of the lens group 10, and imgh is half of the diagonal length of the effective pixel area on the imaging surface of the lens group 10. Satisfying 0.078<bfl / imgh<0.083 can control the optical back focal length of the lens group 10, so as to reduce the volume of the lens group 10 and achieve a miniaturization effect.

[0054] In an exemplary embodiment, the lens group 10 according to this application can satisfy: 1.15 < fg1 / f < 1.38, where fg1 is the focal length of the upper lens group 101 composed of the first lens 11, the second lens 12, the third lens 13 and the fourth lens 14, and f is the total effective focal length of the lens group 10. Satisfying 1.15 < fg1 / f < 1.38 can reasonably correct system aberrations, so that the lens group 10 can meet the required image quality at different object distances.

[0055] In an exemplary embodiment, the lens group 10 according to this application can satisfy: 0.79 < fg2 / f < 0.98, where fg2 is the focal length of the intermediate lens group 102 composed of the fifth lens 15 and the sixth lens 16, and f is the total effective focal length of the lens group 10. Satisfying 0.79 < fg2 / f < 0.98 can reasonably correct system aberrations, so that the lens group 10 can meet the required image quality at different object distances.

[0056] In an exemplary embodiment, the lens group 10 according to this application can satisfy: -0.55 < fg3 / f < -0.47, where fg3 is the focal length of the lower lens group 103 composed of the seventh lens 17 and the eighth lens 18, and f is the total effective focal length of the lens group 10. Satisfying -0.55 < fg3 / f < -0.47 can reasonably correct system aberrations, so that the lens group 10 can meet the required image quality at different object distances.

[0057] In an exemplary embodiment, the lens group 10 according to this application can satisfy: 0.81 < ctg1 / ctg2 < 1.73, where ctg1 is the interval between the upper lens group 101 and the middle lens group 102, and ctg2 is the interval between the middle lens group 102 and the lower lens group 103. Satisfying 0.81 < ctg1 / ctg2 < 1.73 allows the lens group 10 to achieve system miniaturization under different object distances.

[0058] In an exemplary embodiment, the lens group 10 according to this application can satisfy: 0.85 < ctg2 / ctg3 < 1.79, where ctg2 is the interval between the middle lens group 102 and the lower lens group 103, and ctg3 is the optical back focal length, that is, the interval between the lower lens group 103 and the chip. Satisfying 0.85 < ctg2 / ctg3 < 1.79 allows the lens group 10 to achieve system miniaturization under different object distances.

[0059] In an exemplary embodiment, the lens group 10 according to this application can satisfy: 3.6 < ΣCT / Σct56 < 6.23, where ΣCT is the sum of the center thicknesses of all lenses, and Σct56 is the sum of the center thicknesses of the two lenses (i.e., the fifth lens 15 and the sixth lens 16) of the middle lens group 102. Satisfying 3.6 < ΣCT / Σct56 < 6.23 can improve the autofocus capability of the lens, effectively correct the field curvature of the lens and improve the off-axis aberration of the lens, and improve the image quality of the lens.

[0060] In an exemplary embodiment, the lens group 10 according to this application can satisfy: 0.99 < ImgH / f < 1.14, where ImgH is half the diagonal length of the effective pixel area on the imaging plane of the lens group 10, and f is the total effective focal length of the lens group 10. By reasonably selecting the ratio of ImgH and f, it is beneficial to more effectively control the lens length under imaging conditions with a large field of view, which is beneficial to the miniaturization of the camera lens.

[0061] In an exemplary embodiment, the lens group 10 according to this application satisfies: 5.21 < R5 / f < 32.25, where f is the total effective focal length of the lens group 10 and R5 is the radius of curvature of the object-side surface of the third lens 13. Satisfying 5.21 < R5 / f < 32.25 can improve the field curvature and distortion of the lens group 10, while reducing the manufacturing difficulty of the third lens 13.

[0062] In an exemplary embodiment, the lens assembly 10 according to this application satisfies: 0.44 < CT1 / T12 < 0.71, where T12 is the distance between the first lens 11 and the second lens 12 on the optical axis, and CT1 is the center thickness of the first lens 11 on the optical axis. Satisfying 0.44 < CT1 / T12 < 0.71 helps to reduce the amount of deformation caused by lens assembly, reduces assembly difficulty, and thus obtains better image quality.

[0063] In an exemplary embodiment, the lens group 10 according to this application satisfies: -245.3 < (R2 + R3) / (R2 - R3) < 45.3, where R2 is the radius of curvature of the image-side surface of the first lens 11, and R3 is the radius of curvature of the object-side surface of the second lens 12. Satisfying -245.3 < (R2 + R3) / (R2 - R3) < 45.3 allows for reasonable control of the object-side deflection angle of the first lens 11 at the edge of the field of view within a reasonable range, effectively reducing the sensitivity of the lens group 10.

[0064] In an exemplary embodiment, the lens assembly 10 according to this application may be provided with at least one aperture stop, which may be located in front of the first lens 11, between the lenses, or behind the last lens. The aperture configuration may be a front aperture or a center aperture. A front aperture means the aperture is located between the subject and the first lens 11, while a center aperture means the aperture is located between the first lens 11 and the imaging plane. If the aperture is a front aperture, it allows for a longer distance between the exit pupil of the imaging optical system and the imaging plane, giving it a telecentric effect and increasing the efficiency of image reception by the CCD or CMOS sensor. If it is a center aperture, it helps to expand the field of view of the system, giving the imaging optical system the advantages of a wide-angle lens. The aperture stop can be used to reduce stray light, which helps to improve image quality.

[0065] In an exemplary embodiment, the lens can be made of plastic or glass. When the lens is made of glass, the degree of freedom in configuring the refractive power can be increased. Conversely, when the lens is made of plastic, production costs can be effectively reduced. Furthermore, aspherical surfaces (ASPs) can be provided on the lens surface. Aspherical surfaces can be easily manufactured into shapes other than spherical surfaces, obtaining more control variables to reduce aberrations, thereby reducing the number of lenses required and thus effectively reducing the overall optical length.

[0066] In an exemplary embodiment, if the lens surface is convex and the location of the convexity is not defined, it means that the lens surface can be convex near the optical axis; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface can be concave near the optical axis. If the refractive power or focal length of the lens is not defined in its region, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens near the optical axis.

[0067] In an exemplary embodiment, the imaging surface of the camera optical system can be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, especially a curved surface with a concave surface facing the object side.

[0068] Example 1 The lens assembly 10 according to Embodiment 1 of this application is described below with reference to FIGX. Figure 1 A schematic diagram of the lens assembly 10 according to Embodiment 1 of this application is shown. Table 1 shows the basic parameters of the optical imaging lens of Embodiment 1.

[0069] like Figure 1 As shown, the lens group 10 includes, from the object side to the image side, the following components in sequence: aperture 10, first lens 11, second lens 12, third lens 13, fourth lens 14, fifth lens 15, sixth lens 16, seventh lens 17, eighth lens 18, filter 19, and imaging plane.

[0070] The first lens 11 has positive optical power, with its object-side surface 111 being convex and its image-side surface 112 being concave. This allows for more efficient use of the space in the imaging optical system, thereby shortening the back focal length. The second lens 12 also has positive optical power, with its object-side surface 121 being convex and its image-side surface 122 being concave. This helps to position lenses with higher refractive power closer to the center of the overall imaging optical system, avoiding excessive bending of the lens's shape and the resulting manufacturing difficulties. The third lens 13 has positive optical power, with its object-side surface 131 being convex and its image-side surface 132 being convex. The fourth lens 14 has negative optical power, with its object-side surface 141 being concave and its image-side surface 142 being concave. The fifth lens 15 has positive optical power, with its object-side surface 151 being concave and its image-side surface 152 being convex. The sixth lens 16 has positive optical power, with both its object-side surface 161 and image-side surface 162 being convex. This allows for appropriate configuration of the refractive power distribution of the imaging optical system, helping to correct aberrations and expand the field of view. The seventh lens 17 has negative optical power, with both its object-side surface 171 being convex and its image-side surface 172 being concave. This allows the principal point of the imaging optical system to be moved away from the image-side end of the system, shortening the back focal length and preventing the system from becoming too large. The eighth lens 18 has negative optical power, with both its object-side surface 181 and image-side surface 182 being concave. This shortens the overall length and corrects aberrations, while also suppressing the angle at which off-axis light rays incident on the image sensor, increasing the receiving efficiency of the image sensor and further correcting off-axis aberrations. The filter 19 has an object-side surface 191 and an image-side surface 192. Light from the object passes sequentially through surfaces 111 to 192 and is finally imaged onto the imaging surface.

[0071] In an exemplary embodiment, the lens assembly 10 according to this application may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0072] In this example, the total effective focal length f of the lens group 10 is 8.3 mm, the total length TTL of the lens group 10 (i.e., the distance on the optical axis from the object side 111 of the first lens 11 to the imaging surface of the lens group 10) is 10.1 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface of the lens group 10 is 8.165 mm, the maximum field of view FOV of the lens group 10 is 87.6°, and the aperture value Fno of the lens group 10 is 1.95.

[0073] The distance on the optical axis from the surface of the first lens 11 near the light incident end to the imaging plane of the camera lens is TTL = 10.1. Half the diagonal length of the effective pixel area on the imaging plane of lens group 10 is ImgH = 8.165. TTL / ImgH = 1.24. The focal length of the intermediate lens group 102, composed of the fifth lens 15 and the sixth lens 16, is fg2 = 7.2. The ratio of the front and rear radii of curvature r7 and r8 of the fourth lens 14 is r7 / r8 = -0.37. The ratio of the focal length of the first lens 11 to the total effective focal length of lens group 10 is f / f1 = 0.64. The ratio of the focal length of the eighth lens 18 to the radius of curvature of its image side surface is f8 / r16 = -0.96. The ratio of the focal length of the second lens 12 to the image focal length of the sixth lens 16 is f2 / f6 = 6.63. The ratio of the optical back focal length of the lens group 10 to half the diagonal length of the effective pixel area on the imaging plane of the lens group 10 is bfl / imgh = 0.083. ImgH / f = 0.99.

[0074] The ratio of the focal length of the upper lens group 101, composed of the first lens 11, the second lens 12, the third lens 13, and the fourth lens 14, to the total effective focal length of the lens group 10 is fg1 / f = 1.15. The ratio of the focal length of the middle lens group 102, composed of the fifth lens 15 and the sixth lens 16, to the total effective focal length of the lens group 10 is fg2 / f = 0.87. The ratio of the focal length of the lower lens group 103, composed of the seventh lens 17 and the eighth lens 18, to the total effective focal length of the lens group 10 is fg3 / f = -0.46.

[0075] The ratio of the interval ctg1 between the upper lens group 101 and the middle lens group 102 to the interval ctg2 between the middle lens group 102 and the lower lens group 103 is ctg1 / ctg2 = 1.1. The ratio of the interval ctg2 between the middle lens group 102 and the lower lens group 103 to the optical back focal length, i.e., the interval ctg3 between the lower lens group 103 and the chip, is ctg2 / ctg3 = 1.21. The ratio of the sum of the center thicknesses of all lenses ΣCT to the sum of the center thicknesses of the two lenses in the middle lens group 102 (i.e., the fifth lens 15 and the sixth lens 16) Σct56 is ΣCT / Σct56 = 3.6.

[0076] The ratio of the radius of curvature of the object-side surface of the third lens 13 to the total effective focal length of the lens group 10 is R5 / f = 9.0. The ratio of the distance between the first lens 11 and the second lens 12 on the optical axis to the center thickness of the first lens 11 on the optical axis is CT1 / T12 = 0.54. (R2+R3) / (R2-R3) = 7.13. Where R2 is the radius of curvature of the image-side surface of the first lens 11, and R3 is the radius of curvature of the object-side surface of the second lens 12.

[0077] Figure 2 The on-axis chromatic aberration curve of the lens group 10 of Embodiment 1 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 3 The distortion curve of the lens group 10 of Embodiment 1 is shown, which represents the distortion magnitude value corresponding to different image heights. According to Figure 2 and Figure 3 It can be seen that the lens group 10 given in Example 1 can achieve good imaging quality.

[0078] Example 2 The following is for reference Figure 4 The lens assembly 10 according to Embodiment 1 of this application is described. Figure 4 A schematic diagram of the lens assembly 10 according to Embodiment 1 of this application is shown. Table 2 shows the basic parameters of the optical imaging lens of Embodiment 2.

[0079] like Figure 4 As shown, the lens group 10 includes, from the object side to the image side, the following components in sequence: aperture 10, first lens 11, second lens 12, third lens 13, fourth lens 14, fifth lens 15, sixth lens 16, seventh lens 17, eighth lens 18, filter 19, and imaging plane.

[0080] The first lens 11 has positive optical power, with its object-side surface 111 being convex and its image-side surface 112 being concave. This allows for more efficient use of the space in the imaging optical system, thereby shortening the back focal length. The second lens 12 has positive optical power, with its object-side surface 121 being convex and its image-side surface 122 being concave. This helps to position lenses with higher refractive power closer to the center of the overall imaging optical system, avoiding excessive bending of the lens's shape and the resulting manufacturing difficulties. The third lens 13 has positive optical power, with its object-side surface 131 being convex and its image-side surface 132 being convex. The fourth lens 14 has negative optical power, with its object-side surface 141 being concave and its image-side surface 142 being convex. The fifth lens 15 has negative optical power, with its object-side surface 151 being concave and its image-side surface 152 being concave. The sixth lens 16 has positive optical power, with its object-side surface 161 being concave and its image-side surface 162 being convex. This allows for appropriate configuration of the refractive power distribution of the imaging optical system, helping to correct aberrations and expand the field of view. The seventh lens 17 has negative optical power, with its object-side surface 171 being concave and its image-side surface 172 being concave. This allows the principal point of the imaging optical system to be moved away from the image-side end of the system, shortening the back focal length and preventing the system from becoming too large. The eighth lens 18 has negative optical power, with its object-side surface 181 being concave and its image-side surface 182 being concave. This shortens the overall length and corrects aberrations, while also suppressing the angle at which off-axis light rays incident on the image sensor, increasing the receiving efficiency of the image sensor and further correcting off-axis aberrations. The filter 19 has an object-side surface 191 and an image-side surface 192. Light from the object passes sequentially through surfaces 111 to 192 and is finally imaged onto the imaging surface.

[0081] In an exemplary embodiment, the lens assembly 10 according to this application may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0082] In this example, the total effective focal length f of the lens group 10 is 7.2 mm, the total length TTL of the lens group 10 (i.e., the distance on the optical axis from the object side 111 of the first lens 11 to the imaging surface of the lens group 10) is 9.18 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface of the lens group 10 is 8.165 mm, the maximum field of view FOV of the lens group 10 is 95.5°, and the aperture value Fno of the lens group 10 is 1.95.

[0083] The distance on the optical axis from the surface of the first lens 11 near the light incident end to the imaging plane of the camera lens is TTL = 9.18. Half the diagonal length of the effective pixel area on the imaging plane of lens group 10 is ImgH = 8.165. TTL / ImgH = 1.12. The focal length of the intermediate lens group 102, composed of the fifth lens 15 and the sixth lens 16, is fg2 = 7.04. The ratio of the front and rear radii of curvature r7 and r8 of the fourth lens 14 is r7 / r8 = 0.23. The ratio of the focal length of the first lens 11 to the total effective focal length of lens group 10 is f / f1 = 0.54. The ratio of the focal length of the eighth lens 18 to the radius of curvature of its image side surface is f8 / r16 = -1.18. The ratio of the focal length of the second lens 12 to the image focal length of the sixth lens 16 is f2 / f6 = 7.11. The ratio of the optical back focal length of the lens group 10 to half the diagonal length of the effective pixel area on the imaging plane of the lens group 10 is bfl / imgh = 0.083. ImgH / f = 1.14.

[0084] The ratio of the focal length of the upper lens group 101, composed of the first lens 11, the second lens 12, the third lens 13, and the fourth lens 14, to the total effective focal length of the lens group 10 is fg1 / f = 1.18. The ratio of the focal length of the middle lens group 102, composed of the fifth lens 15 and the sixth lens 16, to the total effective focal length of the lens group 10 is fg2 / f = 0.98. The ratio of the focal length of the lower lens group 103, composed of the seventh lens 17 and the eighth lens 18, to the total effective focal length of the lens group 10 is fg3 / f = -0.55.

[0085] The ratio of the interval ctg1 between the upper lens group 101 and the middle lens group 102 to the interval ctg2 between the middle lens group 102 and the lower lens group 103 is ctg1 / ctg2 = 0.81. The ratio of the interval ctg2 between the middle lens group 102 and the lower lens group 103 to the optical back focal length, i.e., the interval ctg3 between the lower lens group 103 and the chip, is ctg2 / ctg3 = 0.89. The ratio of the sum of the center thicknesses of all lenses ΣCT to the sum of the center thicknesses of the two lenses in the middle lens group 102 (i.e., the fifth lens 15 and the sixth lens 16) Σct56 is ΣCT / Σct56 = 4.11.

[0086] The ratio of the radius of curvature of the object-side surface of the third lens 13 to the total effective focal length of the lens group 10 is R5 / f = 32.24. The ratio of the distance between the first lens 11 and the second lens 12 on the optical axis to the center thickness of the first lens 11 on the optical axis is CT1 / T12 = 0.71. (R2+R3) / (R2-R3) = 45.33. Where R2 is the radius of curvature of the image-side surface of the first lens 11, and R3 is the radius of curvature of the object-side surface of the second lens 12.

[0087] Figure 5 The on-axis chromatic aberration curve of the lens group 10 of Embodiment 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 6 The distortion curve of the lens group 10 in Embodiment 2 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figure 5 and Figure 6 It can be seen that the lens group 10 given in Example 2 can achieve good imaging quality.

[0088] Example 3 The following is for reference Figure 7 The lens assembly 10 according to Embodiment 1 of this application is described. Figure 7 A schematic diagram of the lens assembly 10 according to Embodiment 1 of this application is shown. Table 3 shows the basic parameters of the optical imaging lens of Embodiment 3.

[0089] like Figure 7 As shown, the lens group 10 includes, from the object side to the image side, the following components in sequence: aperture 10, first lens 11, second lens 12, third lens 13, fourth lens 14, fifth lens 15, sixth lens 16, seventh lens 17, eighth lens 18, filter 19, and imaging plane.

[0090] The first lens 11 has positive optical power, with its object-side surface 111 being convex and its image-side surface 112 being concave. This allows for more efficient use of the space in the imaging optical system, thereby shortening the back focal length. The second lens 12 has positive optical power, with its object-side surface 121 being convex and its image-side surface 122 being concave. This helps to position lenses with higher refractive power closer to the center of the overall imaging optical system, avoiding excessive bending of the lens's shape and the resulting manufacturing difficulties. The third lens 13 has positive optical power, with its object-side surface 131 being convex and its image-side surface 132 being convex. The fourth lens 14 has negative optical power, with its object-side surface 141 being concave and its image-side surface 142 being concave. The fifth lens 15 has negative optical power, with its object-side surface 151 being concave and its image-side surface 152 being concave. The sixth lens 16 has positive optical power, with both its object-side surface 161 and image-side surface 162 being convex. This allows for appropriate configuration of the refractive power distribution of the imaging optical system, helping to correct aberrations and expand the field of view. The seventh lens 17 has negative optical power, with both its object-side surface 171 being convex and its image-side surface 172 being concave. This allows the principal point of the imaging optical system to be moved away from the image-side end of the system, shortening the back focal length and preventing the system from becoming too large. The eighth lens 18 has negative optical power, with both its object-side surface 181 and image-side surface 182 being concave. This shortens the overall length and corrects aberrations, while also suppressing the angle at which off-axis light rays incident on the image sensor, increasing the receiving efficiency of the image sensor and further correcting off-axis aberrations. The filter 19 has an object-side surface 191 and an image-side surface 192. Light from the object passes sequentially through surfaces 111 to 192 and is finally imaged onto the imaging surface.

[0091] In an exemplary embodiment, the lens assembly 10 according to this application may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0092] In this example, the total effective focal length f of the lens group 10 is 7.7 mm, the total length TTL of the lens group 10 (i.e., the distance on the optical axis from the object side S1 of the first lens 11E1 to the imaging surface of the lens group 10) is 11.1 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S19 of the lens group 10 is 8.165 mm, the maximum field of view FOV of the lens group 10 is 91.4°, and the aperture value Fno of the lens group 10 is 1.73.

[0093] The distance on the optical axis from the surface of the first lens 11 near the light incident end to the imaging plane of the camera lens is TTL = 11.1. Half the diagonal length of the effective pixel area on the imaging plane of lens group 10 is ImgH = 8.165. TTL / ImgH = 1.36. The focal length of the intermediate lens group 102, composed of the fifth lens 15 and the sixth lens 16, is fg2 = 6.06. The ratio of the front and rear radii of curvature r7 and r8 of the fourth lens 14 is r7 / r8 = -0.38. The ratio of the focal length of the first lens 11 to the total effective focal length of lens group 10 is f / f1 = 0.51. The ratio of the focal length of the eighth lens 18 to the radius of curvature of its image side surface is f8 / r16 = -1.46. The ratio of the focal length of the second lens 12 to the image focal length of the sixth lens 16 is f2 / f6 = 18.4. The ratio of the optical back focal length of the lens group 10 to half the diagonal length of the effective pixel area on the imaging plane of the lens group 10 is bfl / imgh = 0.078. ImgH / f = 1.06.

[0094] The ratio of the focal length of the upper lens group 101, composed of the first lens 11, the second lens 12, the third lens 13, and the fourth lens 14, to the total effective focal length of the lens group 10 is fg1 / f = 1.38. The ratio of the focal length of the middle lens group 102, composed of the fifth lens 15 and the sixth lens 16, to the total effective focal length of the lens group 10 is fg2 / f = 0.79. The ratio of the focal length of the lower lens group 103, composed of the seventh lens 17 and the eighth lens 18, to the total effective focal length of the lens group 10 is fg3 / f = -0.52.

[0095] The ratio of the interval ctg1 between the upper lens group 101 and the middle lens group 102 to the interval ctg2 between the middle lens group 102 and the lower lens group 103 is ctg1 / ctg2 = 1.73. The ratio of the interval ctg2 between the middle lens group 102 and the lower lens group 103 to the optical back focal length, i.e., the interval ctg3 between the lower lens group 103 and the chip, is ctg2 / ctg3 = 1.79. The ratio of the sum of the center thicknesses of all lenses ΣCT to the sum of the center thicknesses of the two lenses in the middle lens group 102 (i.e., the fifth lens 15 and the sixth lens 16) Σct56 is ΣCT / Σct56 = 6.23.

[0096] The ratio of the radius of curvature of the object-side surface of the third lens 13 to the total effective focal length of the lens group 10 is R5 / f = 6.81. The ratio of the distance between the first lens 11 and the second lens 12 on the optical axis to the center thickness of the first lens 11 on the optical axis is CT1 / T12 = 0.7. (R2+R3) / (R2-R3) = 7.32. Where R2 is the radius of curvature of the image-side surface of the first lens 11, and R3 is the radius of curvature of the object-side surface of the second lens 12.

[0097] Figure 8 The on-axis chromatic aberration curve of the lens group 10 of Embodiment 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 9 The distortion curve of the lens group 10 in Embodiment 3 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figure 8 and Figure 9 It can be seen that the lens group 10 given in Example 3 can achieve good imaging quality.

[0098] Example 4 The following is for reference Figure 10 The lens assembly 10 according to Embodiment 1 of this application is described. Figure 10 A schematic diagram of the lens assembly 10 according to Embodiment 1 of this application is shown. Table 4 shows the basic parameters of the optical imaging lens of Embodiment 4.

[0099] like Figure 10 As shown, the lens group 10 includes, from the object side to the image side, the following components in sequence: aperture 10, first lens 11, second lens 12, third lens 13, fourth lens 14, fifth lens 15, sixth lens 16, seventh lens 17, eighth lens 18, filter 19, and imaging plane.

[0100] The first lens 11 has positive optical power, with its object-side surface 111 being convex and its image-side surface 112 being concave. This allows for more efficient use of the space within the imaging optical system, thereby shortening the back focal length of the system. The second lens 12 has negative optical power, with its object-side surface 121 being convex and its image-side surface 122 being concave. The third lens 13 has positive optical power, with its object-side surface 131 being convex and its image-side surface 132 being convex. The fourth lens 14 has negative optical power, with its object-side surface 141 being convex and its image-side surface 142 being concave. The fifth lens 15 has negative optical power, with its object-side surface 151 being concave and its image-side surface 152 being concave. The sixth lens 16 has positive optical power, with its object-side surface 161 being concave and its image-side surface 162 being convex. This allows for appropriate configuration of the refractive power distribution within the imaging optical system, helping to correct aberrations and expand the field of view. The seventh lens 17 has negative optical power, with its object-side surface 171 being convex and its image-side surface 172 being concave. This allows the principal point of the imaging optical system to be moved away from the image-side end of the system, thereby shortening the back focal length and preventing the system from becoming too large. The eighth lens 18 has negative optical power, with its object-side surface 181 being concave and its image-side surface 182 being concave. This shortens the overall length and corrects aberrations. It also suppresses the angle at which off-axis light rays are incident on the image sensor, increasing the image sensor's receiving efficiency and further correcting off-axis aberrations. The filter 19 has an object-side surface 191 and an image-side surface 192. Light from the object passes sequentially through surfaces 111 to 192 and is finally imaged onto the imaging surface.

[0101] In an exemplary embodiment, the lens assembly 10 according to this application may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0102] In this example, the total effective focal length f of the lens group 10 is 7.9 mm, the total length TTL of the lens group 10 (i.e., the distance on the optical axis from the object side S1 of the first lens 11E1 to the imaging surface of the lens group 10) is 9.4 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S19 of the lens group 10 is 8.165 mm, the maximum field of view FOV of the lens group 10 is 90.1°, and the aperture value Fno of the lens group 10 is 2.4.

[0103] The distance on the optical axis from the surface of the first lens 11 near the light incident end to the imaging plane of the camera lens is TTL = 9.4. Half the diagonal length of the effective pixel area on the imaging plane of lens group 10 is ImgH = 8.165. TTL / ImgH = 1.15. The focal length of the intermediate lens group 102, composed of the fifth lens 15 and the sixth lens 16, is fg2 = 7.15. The ratio of the front and rear radii of curvature r7 and r8 of the fourth lens 14 is r7 / r8 = 4.13. The ratio of the focal length of the first lens 11 to the total effective focal length of lens group 10 is f / f1 = 0.86. The ratio of the focal length of the eighth lens 18 to the radius of curvature of its image side surface is f8 / r16 = -1.63. The ratio of the focal length of the second lens 12 to the image focal length of the sixth lens 16 is f2 / f6 = -10.41. The ratio of the optical back focal length of the lens group 10 to half the diagonal length of the effective pixel area on the imaging plane of the lens group 10 is bfl / imgh = 0.078. ImgH / f = 1.03.

[0104] The ratio of the focal length of the upper lens group 101, composed of the first lens 11, the second lens 12, the third lens 13, and the fourth lens 14, to the total effective focal length of the lens group 10 is fg1 / f = 1.16. The ratio of the focal length of the middle lens group 102, composed of the fifth lens 15 and the sixth lens 16, to the total effective focal length of the lens group 10 is fg2 / f = 0.9. The ratio of the focal length of the lower lens group 103, composed of the seventh lens 17 and the eighth lens 18, to the total effective focal length of the lens group 10 is fg3 / f = -0.47.

[0105] The ratio of the interval ctg1 between the upper lens group 101 and the middle lens group 102 to the interval ctg2 between the middle lens group 102 and the lower lens group 103 is ctg1 / ctg2 = 0.83. The ratio of the interval ctg2 between the middle lens group 102 and the lower lens group 103 to the optical back focal length, i.e., the interval ctg3 between the lower lens group 103 and the chip, is ctg2 / ctg3 = 0.86. The ratio of the sum of the center thicknesses of all lenses ΣCT to the sum of the center thicknesses of the two lenses in the middle lens group 102 (i.e., the fifth lens 15 and the sixth lens 16) Σct56 is ΣCT / Σct56 = 4.13.

[0106] The ratio of the radius of curvature of the object-side surface of the third lens 13 to the total effective focal length of the lens group 10 is R5 / f = 5.21. The ratio of the distance between the first lens 11 and the second lens 12 on the optical axis to the center thickness of the first lens 11 on the optical axis is CT1 / T12 = 0.44. (R2+R3) / (R2-R3) = -245.32. Where R2 is the radius of curvature of the image-side surface of the first lens 11, and R3 is the radius of curvature of the object-side surface of the second lens 12.

[0107] Figure 11 The on-axis chromatic aberration curve of the lens group 10 of Embodiment 4 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 12 The distortion curve of lens group 10 in Embodiment 4 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figure 11 and Figure 12 It can be seen that the lens group 10 given in Example 4 can achieve good imaging quality.

[0108] This application also provides an optical assembly 100, which includes the aforementioned lens group 10 and a driving assembly 20. A portion of the lens group 10 is disposed within the driving assembly 20 and is held and driven by the driving assembly 20. The lens group 10 is composed of multiple lenses. In one optional embodiment of the invention, the lens group 10 may include eight lenses with optical power, namely a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a seventh lens 17, and an eighth lens 18, arranged sequentially along the optical axis from the object side to the image side. In some optional embodiments, the upper lens group 101 of the lens group 10 includes the first lens 11, the second lens 12, the third lens 13, and the fourth lens 14; the middle lens group 102 includes the fifth lens 15 and the sixth lens 16; and the lower lens group 103 includes the seventh lens 17 and the eighth lens 18. The upper lens group 101 is disposed on the upper side of the driving assembly 20, the middle lens group 102 is disposed inside or on the upper side of the driving assembly 20, and the lower lens group 103 is disposed inside the driving assembly 20, so as to allow light to pass through the upper lens group 101, the middle lens group 102 and the lower lens group 103 of the optical lens in sequence. At the same time, the positional ratio of the above lens groups and the driving assembly can realize the advantage of low shoulder height of the module.

[0109] Specifically, such as Figure 13 As shown, in an exemplary embodiment, the drive assembly 20 includes a housing, a focusing unit, an optical image stabilization unit, and a base. The intermediate lens group 102 is disposed inside the drive assembly 20. The focusing unit is configured to drive the intermediate lens group 102 to move along the optical axis to achieve optical focusing. The optical image stabilization unit is configured to drive at least a portion of the lens group 10 to move along a direction perpendicular to the optical axis to achieve optical image stabilization.

[0110] It is worth mentioning that the positional relationship between the focusing unit and the optical image stabilization unit is not limited in the optical assembly 100 of the present invention. In some other embodiments, the optical image stabilization unit may be located inside the focusing unit, so that when the focusing unit drives the central lens group 102 to move along the optical axis, it can simultaneously drive the optical image stabilization unit to move along the optical axis, thereby achieving focusing during the shooting process.

[0111] In an exemplary embodiment, the middle lens group 102 is disposed on the driving assembly 20, and under the driving force of the driving assembly 20, the middle lens group 102 can move along the optical axis to achieve focusing. In some exemplary embodiments, the middle lens group 102 can also be driven by the driving assembly 20 to move in a plane perpendicular to the optical axis to achieve optical image stabilization.

[0112] In an exemplary embodiment, the optical component 100 moves the middle group lens group 102 of the drive lens group 10 to resolve the contradiction between insufficient driving force of the drive component 20 and increased motor size, thereby effectively utilizing the internal space of the drive component 20 and the overall size space of the optical component 100.

[0113] In this embodiment, the middle lens group 102 is configured in the movable lens, that is, the relative position of the middle lens group 102 with respect to the upper lens group 101 and the lower lens group 103 can be adjusted. The upper lens group 101 and the lower lens group 103 are respectively fixed to the fixed part of the driving assembly 20. In this way, during the shooting process, the middle lens group 102 is set in the movable part of the driving assembly 20, and the middle lens group 102 is adjusted to a predetermined position to form a clear image. This solves the problem of insufficient driving force when the driving assembly 20 drives the entire optical lens, while meeting the design requirements of miniaturization of the optical assembly 100.

[0114] The intermediate lens group 102 is disposed on the drive assembly 20 and connected to the movable part of the drive assembly 20. The intermediate lens group 102 can be driven by the focusing part to move along the direction of the optical axis, thereby achieving the focusing function during the shooting process. The lens group 10 or the intermediate lens group 102 can be driven by the optical image stabilization part to move along the direction perpendicular to the optical axis, thereby achieving the image stabilization function during the shooting process.

[0115] This application also provides a camera module, wherein the optical component 100 is integrated with a photosensitive component 200 to form the camera module. The photosensitive component 200 includes at least one circuit board, at least one photosensitive chip, and a filter element. The photosensitive chip is mounted and electrically connected to the circuit board, and the filter element is held in the photosensitive path of the photosensitive chip. The optical component 100 is held in the photosensitive path of the photosensitive component 200, so that light entering the optical component 100 reaches the photosensitive chip of the photosensitive component 200 after passing through the optical component 100, thereby realizing imaging.

[0116] The basic principles, main features, and advantages of this invention have been described above. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection claimed by this invention is defined by the appended claims and their equivalents.

Claims

1. A lens assembly, characterized in that, The lens assembly consists of eight lenses, arranged sequentially from the light-incident end to the light-outceasing end: first lens; second lens; third lens; fourth lens; fifth lens; sixth lens; seventh lens; eighth lens; The first lens, the second lens, the third lens, and the fourth lens form the upper lens group; the fifth lens and the sixth lens form the middle lens group; and the seventh lens and the eighth lens form the lower lens group. The first lens has positive optical power, with a convex object side and a concave image side; The object-side surface of the second lens is convex, and the image-side surface is concave. The third lens has positive optical power, and the object side and the image side are both convex. The fourth lens has negative optical power; The object-side surface of the fifth lens is concave. The sixth lens has positive optical power and its image-side surface is convex. The seventh lens has negative optical power and its image side is concave. The eighth lens has negative optical power, and the object side and the image side are both concave. The ratio of the combined focal length fg2 of the fifth and sixth lenses to the total focal length f of the lens group is: 0.79 < fg2 / f < 0.98; the relative position of the middle lens group with respect to the upper and lower lens groups can be adjusted; when the middle lens group moves along the optical axis to focus, the TTL value of the lens group remains unchanged at near focus and at infinity; the TTL of the lens group satisfies the following condition with respect to half the diagonal length ImgH of the effective pixel area on the imaging plane of the lens group: 1.12 < TTL / ImgH < 1.

36.

2. The lens assembly according to claim 1, characterized in that, The fifth lens and the sixth lens together form a middle group of lenses with a focal length fg2 that satisfies: 6.06 < fg2 < 7.

21.

3. The lens assembly according to claim 1, characterized in that, The focal length f1 of the first lens and the total effective focal length f of the lens group satisfy the following condition: 0.51 < f / f1 < 0.

86.

4. The lens assembly according to claim 1, characterized in that, The radius of curvature r7 of the object side of the fourth lens and the radius of curvature r8 of the image side of the fourth lens satisfy the following condition: -0.38 < r7 / r8 < 4.

134.

5. The lens assembly according to claim 1, characterized in that, The focal length f8 of the eighth lens and the radius of curvature r16 of the image side surface of the eighth lens satisfy the following condition: -1.63 < f8 / r16 < -0.

96.

6. The lens assembly according to claim 1, characterized in that, The focal length f2 of the second lens and the focal length f6 of the sixth lens satisfy the following condition: -10.4 < f2 / f6 < 18.

4.

7. The lens assembly according to claim 1, characterized in that, The optical back focal length bfl of the lens group and half the diagonal length imgh of the effective pixel area on the imaging plane of the lens group satisfy the following condition: 0.078 < bfl / imgh < 0.

083.

8. An optical component, characterized in that, include: Driver components; as well as The lens assembly as claimed in any one of claims 1 to 7, wherein a portion of the lens assembly is disposed within the drive assembly.

9. A camera module, characterized in that, include: Photosensitive components; as well as The optical component as claimed in claim 8, wherein the optical component is mounted above the photosensitive component and held in the optical path of the photosensitive component.

Images