Camera lens assembly

Abstract

The application provides a camera lens. The camera lens comprises, in order from the object side to the image side along the optical axis: a first lens group with positive refractive power, a second lens group with positive refractive power, and a third lens group with negative refractive power; the first lens group comprises, in order from the object side to the image side along the optical axis: a first lens with positive refractive power; a turning element without refractive power; a second lens with negative refractive power; the second lens group comprises, in order from the object side to the image side along the optical axis: a third lens with positive refractive power; a fourth lens with negative refractive power; a fifth lens with positive refractive power; a sixth lens with refractive power; the third lens group comprises, in order from the object side to the image side along the optical axis: a seventh lens with refractive power; an eighth lens with refractive power; a ninth lens with negative refractive power; the second lens group can move along the optical axis, and the camera lens satisfies: 5.90 <= TTL / △f < 7.50; 1.25 < (F1+F3) / F2 < 2.40.

Description

Technical Field

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

[0002] With the continuous upgrading of mobile terminals such as smartphones, drones, and AR / VR, the demand for "ultra-thin, large image sensor, and telephoto" has become increasingly demanding. Traditional vertical telephoto lenses can no longer meet the body thickness limitations due to their excessively long TTL (Total Track Length).

[0003] Therefore, there is an urgent need for a periscope telephoto lens with short TTL, lightweight focus group, high focus travel ratio, low temperature drift, and excellent imaging performance. Summary of the Invention

[0004] The advantage of this application lies in providing a camera lens assembly that possesses comprehensive performance characteristics of being ultra-thin, lightweight, high-resolution, and having low temperature drift.

[0005] This application provides a camera lens assembly, comprising, arranged sequentially along the optical axis from the object side to the image side: a first lens group with positive optical power, a second lens group with positive optical power, and a third lens group with negative optical power; the first lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens with positive optical power, whose object side is convex; a reversing element without optical power; and a second lens with negative optical power, whose image side is concave; the second lens group includes, arranged sequentially along the optical axis from the object side to the image side: a third lens with positive optical power, whose object side is convex; a fourth lens with negative optical power, whose object side is convex and image side is concave; a fifth lens with positive optical power; and a sixth lens with optical power, whose image side is convex; the third... The three-lens group comprises, arranged sequentially from the object side to the image side along the optical axis: a seventh lens with optical power and a concave object side; an eighth lens with optical power; and a ninth lens with negative optical power and a concave image side. The second lens group is movable along the optical axis. The camera lens group satisfies: 5.90 ≤ TTL / Δf < 7.50; 1.25 < (F1 + F3) / F2 < 2.40; where Δf is the difference in effective focal length of the camera lens group when the distance between the subject and the camera lens group ranges from infinity to 150 mm; F1 is the effective focal length of the first lens group, F2 is the effective focal length of the second lens group, F3 is the effective focal length of the third lens group, and TTL is the distance from the object side of the first lens to the imaging plane on the optical axis.

[0006] In some embodiments of the present application, the camera lens group satisfies: 1.60 < F1 / fi ≤ 2.50; where fi is the effective focal length of the camera lens group when the object distance from the camera lens group is at infinity, and F1 is the effective focal length of the first lens group.

[0007] In some embodiments of the present application, the camera lens group satisfies: -1.55 < fi / F3 < -1.15; where fi is the effective focal length of the camera lens group when the object distance from the camera lens group is at infinity, and F3 is the effective focal length of the third lens group.

[0008] In some embodiments of the present application, the camera lens group satisfies: 1.90 < (T23 + T67) / △T < 2.25; where △T is the movable distance of the second lens group on the optical axis when the object distance from the camera lens group changes from infinity to 150 mm, T23 is the air gap on the optical axis between the second lens and the third lens, and T67 is the air gap on the optical axis between the sixth lens and the seventh lens.

[0009] In some embodiments of the present application, the camera lens group satisfies: -1.70 < f2 / f1 < -1.20; where f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens.

[0010] In some embodiments of the present application, the camera lens group satisfies: 1.65 < f1 / R1 < 1.95; 1.45 ≤ R4 / R1 < 2.45; where f1 is the effective focal length of the first lens, R1 is the curvature radius of the object side surface of the first lens, and R4 is the curvature radius of the image side surface of the second lens.

[0011] In some embodiments of the present application, the camera lens group satisfies: -2.65 ≤ F2 / f4 - F2 / f5 < -1.65; where F2 is the effective focal length of the second lens group, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

[0012] In some embodiments of the present application, the camera lens group satisfies: 0.45 < F2 / f3 < 1.65; where F2 is the effective focal length of the second lens group and f3 is the effective focal length of the third lens.

[0013] In some embodiments of the present application, the camera lens group satisfies: 3.30 < Td2 / (T45 + T56) ≤ 6.80; 1.85 ≤ Td2 / (CT3 + CT4) < 2.60; where Td2 is the distance on the optical axis from the object side surface of the third lens in the second lens group to the image side surface of the sixth lens, CT3 is the central thickness of the third lens, CT4 is the central thickness of the fourth lens, T45 is the air gap on the optical axis from the fourth lens to the fifth lens, and T56 is the air gap on the optical axis from the fifth lens to the sixth lens.

[0014] In some embodiments of the present application, the camera lens group satisfies: 1.65 ≤ f3 / R5 < 5.95; -3.75 < f4 / R8 < -1.85; where f3 is the effective focal length of the third lens, R5 is the curvature radius of the object side surface of the third lens, f4 is the effective focal length of the fourth lens, and R8 is the curvature radius of the image side surface of the fourth lens.

[0015] In some embodiments of the present application, the camera lens group satisfies: -1.45 ≤ R12 / |R11| < -0.10; where R11 is the curvature radius of the object side surface of the sixth lens, and R12 is the curvature radius of the image side surface of the sixth lens.

[0016] In some embodiments of the present application, the camera lens group satisfies: 5.95 ≤ f56 / (CT5 + CT6) ≤ 19.80; where f56 is the combined focal length of the fifth lens and the sixth lens, CT5 is the central thickness of the fifth lens, and CT6 is the central thickness of the sixth lens.

[0017] In some embodiments of the present application, the camera lens group satisfies: 0.7 < f5 / f56 < 2.95; where f56 is the combined focal length of the fifth lens and the sixth lens, and f5 is the effective focal length of the fifth lens.

[0018] In some embodiments of the present application, the camera lens group satisfies: 0.95 ≤ f9 / F3 ≤ 1.50; where f9 is the effective focal length of the ninth lens, and F3 is the effective focal length of the third lens group.

[0019] In some embodiments of the present application, the camera lens group satisfies: -2.25 < F3 / |f7| + F3 / |f8| < -0.45; where f7 is the effective focal length of the seventh lens, f8 is the effective focal length of the eighth lens, and F3 is the effective focal length of the third lens group.

[0020] In some embodiments of this application, the camera lens group satisfies: 1.05≤F3 / R13<4.55; where F3 is the effective focal length of the third lens group and R13 is the radius of curvature of the object side of the seventh lens.

[0021] In some embodiments of this application, the camera lens group satisfies: 1.10 < (CT7 + CT8) / CT9 < 3.05; 1.45 ≤ Td3 / (T78 + T89) < 2.55; where CT7 is the center thickness of the seventh lens, CT8 is the center thickness of the eighth lens, CT9 is the center thickness of the ninth lens, T78 is the air gap between the seventh lens and the eighth lens on the optical axis, T89 is the air gap between the eighth lens and the ninth lens on the optical axis, and Td3 is the distance on the optical axis from the object side of the seventh lens to the image side of the ninth lens in the third lens group.

[0022] In some embodiments of this application, the camera lens group satisfies: 1.55 < (N7 + N8 + N9) / 3 < 1.65; where N7 is the refractive index of the seventh lens, N8 is the refractive index of the eighth lens, and N9 is the refractive index of the ninth lens.

[0023] In some embodiments of this application, the camera lens group satisfies: 1.55 < Δf / ΔT < 1.85; where Δf is the difference in the effective focal length of the camera lens group when the distance between the subject and the camera lens group ranges from infinity to 150mm; and ΔT is the movable distance of the second lens group on the optical axis when the distance between the subject and the camera lens group ranges from infinity to 150mm.

[0024] In summary, the camera lens assembly of this application achieves rapid focusing of the subject from infinity to 150 mm macro distance by moving only the second lens group. Specifically, the focusing travel distance is increased to 13%–17% of the total time-of-flight (TTL), meeting the focusing requirements at 150 mm macro distance while maintaining controllable overall thickness. Furthermore, by rationally allocating the optical power of the first, second, and third lens groups, and by compensating for image plane curvature due to changes in object distance through the movement of the second lens group, the overall system length remains constant. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structural parameters of Embodiment 1 when the subject is at infinity from the camera lens assembly;

[0026] Figure 2 This is a schematic diagram of the structural parameters of Embodiment 1 when the subject is 150mm away from the camera lens assembly;

[0027] Figure 3AThis diagram illustrates the on-axis chromatic aberration curve of Embodiment 1 when the subject is at infinity from the camera lens assembly.

[0028] Figure 3B This diagram illustrates the astigmatism curve of Embodiment 1 when the subject is at infinity from the camera lens assembly.

[0029] Figure 3C This diagram illustrates the distortion curve of Embodiment 1 when the subject is at infinity from the camera lens assembly.

[0030] Figure 3D This diagram illustrates the on-axis chromatic aberration curve of Embodiment 1 when the subject is 150mm away from the camera lens assembly.

[0031] Figure 3E A schematic diagram of the astigmatism curve of Embodiment 1 when the subject is 150mm away from the camera lens group is shown;

[0032] Figure 3F A schematic diagram of the distortion curve of Embodiment 1 when the subject is 150mm away from the camera lens group is shown;

[0033] Figure 4A This is a schematic diagram of the structural parameters of Embodiment 2 when the subject is at infinity from the camera lens assembly;

[0034] Figure 4B This is a schematic diagram of the structural parameters of Embodiment 2 when the subject is 150mm away from the camera lens assembly;

[0035] Figure 5A This diagram illustrates the on-axis chromatic aberration curve of Embodiment 2 when the subject is at infinity from the camera lens assembly.

[0036] Figure 5B This diagram illustrates the astigmatism curve of Embodiment 2 when the subject is at infinity from the camera lens assembly.

[0037] Figure 5C This diagram illustrates the distortion curve of Embodiment 2 when the subject is at infinity from the camera lens assembly.

[0038] Figure 5D This diagram illustrates the on-axis chromatic aberration curve of Embodiment 2 when the subject is 150mm away from the camera lens assembly.

[0039] Figure 5E This diagram illustrates the astigmatism curve when the subject is 150mm away from the camera lens assembly, as shown in Embodiment 2.

[0040] Figure 5F This diagram illustrates the distortion curve of Embodiment 2 when the subject is 150mm away from the camera lens assembly.

[0041] Figure 6AThis is a schematic diagram of the structural parameters of Embodiment 3 when the subject is at infinity from the camera lens assembly;

[0042] Figure 6B This is a schematic diagram of the structural parameters of Embodiment 3 when the subject is 150mm away from the camera lens assembly;

[0043] Figure 7A This diagram illustrates the on-axis chromatic aberration curve of Embodiment 3 when the subject is at infinity from the camera lens assembly.

[0044] Figure 7B This diagram illustrates the astigmatism curve of Embodiment 3 when the subject is at infinity from the camera lens assembly.

[0045] Figure 7C This diagram illustrates the distortion curve of Embodiment 3 when the subject is at infinity from the camera lens assembly.

[0046] Figure 7D This diagram illustrates the on-axis chromatic aberration curve of Embodiment 3 when the subject is 150mm away from the camera lens assembly.

[0047] Figure 7E This diagram illustrates the astigmatism curve when the subject is 150mm away from the camera lens assembly in Embodiment 3.

[0048] Figure 7F This diagram illustrates the distortion curve of Embodiment 3 when the subject is 150mm away from the camera lens assembly.

[0049] Figure 8A This is a schematic diagram of the structural parameters of Embodiment 4 when the subject is at infinity from the camera lens assembly;

[0050] Figure 8B This is a schematic diagram of the structural parameters of Embodiment 4 when the subject is 150mm away from the camera lens assembly;

[0051] Figure 9A This diagram illustrates the on-axis chromatic aberration curve of Embodiment 4 when the subject is at infinity from the camera lens assembly.

[0052] Figure 9B This diagram illustrates the astigmatism curve of Embodiment 4 when the subject is at infinity from the camera lens assembly.

[0053] Figure 9C This diagram illustrates the distortion curve of Embodiment 4 when the subject is at infinity from the camera lens assembly.

[0054] Figure 9D This diagram illustrates the on-axis chromatic aberration curve of Embodiment 4 when the subject is 150mm away from the camera lens assembly.

[0055] Figure 9EA schematic diagram of the astigmatism curve is shown in Embodiment 4 when the subject is 150mm away from the camera lens assembly;

[0056] Figure 9F This diagram illustrates the distortion curve of Embodiment 4 when the subject is 150mm away from the camera lens assembly.

[0057] Figure 10A This is a schematic diagram of the structural parameters of Embodiment 5 when the subject is at infinity from the camera lens assembly;

[0058] Figure 10B This is a schematic diagram of the structural parameters of Embodiment 5 when the subject is 150mm away from the camera lens assembly;

[0059] Figure 11A This diagram illustrates the on-axis chromatic aberration curve of Embodiment 5 when the subject is at infinity from the camera lens assembly.

[0060] Figure 11B This diagram illustrates the astigmatism curve of Embodiment 5 when the subject is at infinity from the camera lens assembly.

[0061] Figure 11C This diagram illustrates the distortion curve of Embodiment 5 when the subject is at infinity from the camera lens assembly.

[0062] Figure 11D This diagram illustrates the on-axis chromatic aberration curve of Embodiment 5 when the subject is 150mm away from the camera lens assembly.

[0063] Figure 11E A schematic diagram of the astigmatism curve is shown in Embodiment 5 when the subject is 150mm away from the camera lens assembly;

[0064] Figure 11F This diagram illustrates the distortion curve of Embodiment 5 when the subject is 150mm away from the camera lens assembly.

[0065] Figure 12 A schematic diagram of the structural parameters of the camera lens assembly is shown when the turning element is a triangular prism, based on Embodiment 5. Detailed Implementation

[0066] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0067] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0068] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0069] In this paper, the paraxial region refers to the area near the optical axis. If the lens surface is convex and its location is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and its location is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined by the sign of the R value (R refers to the radius of curvature of the paraxial region). In this paper, the surface of each lens closest to the subject is called the object-side surface, and the surface of each lens closest to the imaging plane is called the image-side surface. For the object-side surface, when the R value is positive, it is considered convex, and when the R value is negative, it is considered concave; for the image-side surface, when the R value is positive, it is considered concave, and when the R value is negative, it is considered convex.

[0070] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0071] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0072] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The following embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be pointed out that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0073] like Figure 1 and Figure 2 As shown, one embodiment of this application proposes a camera lens assembly, comprising, arranged sequentially along the optical axis from the object side to the image side: a first lens group with positive optical power, a second lens group with positive optical power, and a third lens group with negative optical power; the first lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens with positive optical power, the object side of which is convex; a reversing element without optical power; and a second lens with negative optical power, the image side of which is concave; the second lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens with positive optical power, the object side of which is convex; a reversing element without optical power; and a second lens with negative optical power, the image side of which is concave; the second lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens with positive optical power, the object side of which is convex; a reversing element without optical power; and a third lens with negative optical power. The third lens group comprises a third lens with optical power and a convex object-side surface; a fourth lens with negative optical power and a convex object-side surface and a concave image-side surface; a fifth lens with positive optical power; and a sixth lens with optical power and a convex image-side surface. The third lens group includes, arranged sequentially along the optical axis from the object side to the image side: a seventh lens with optical power and a concave object-side surface; an eighth lens with optical power; and a ninth lens with negative optical power and a concave image-side surface. When the distance between the subject and the camera lens group changes, focus adjustment can be achieved by moving the second lens group along the optical axis.

[0074] Specifically, the camera lens assembly satisfies: 5.90 ≤ TTL / △f < 7.50; and 1.25 < (F1 + F3) / F2 < 2.40;

[0075] Wherein, △f is the difference in the effective focal length of the camera lens group when the distance between the subject and the camera lens group ranges from infinity to 150mm; F1 is the effective focal length of the first lens group, F2 is the effective focal length of the second lens group, F3 is the effective focal length of the third lens group, and TTL is the distance on the optical axis from the side of the first lens to the imaging surface.

[0076] It should be noted that for the camera lens group in the above embodiments of the present application, rapid focusing from infinity to 150 mm macro for the object to be photographed can be achieved by only moving the second lens group. Specifically, the proportion of the focusing travel movement amount to the TTL is increased to 13% - 17%, while ensuring that the overall thickness of the whole machine is controllable while meeting the focusing requirements at 150 mm macro; in addition, by reasonably distributing the optical powers of the first, second, and third lens groups, the image plane curvature when the object distance changes is compensated by the movement of the second lens group, and the overall system length remains unchanged.

[0077] Furthermore, the present application also jointly optimizes the optical power distribution, curvature, thickness, refractive index, and travel ratio, so as to achieve comprehensive performances of ultra-thin, lightweight, high resolution, and low temperature drift.

[0078] According to some embodiments of the present application, the camera lens group satisfies: 1.60 < F1 / fi ≤ 2.50; where fi is the effective focal length of the camera lens group when the object to be photographed is at infinity from the camera lens group, and F1 is the effective focal length of the first lens group.

[0079] By controlling the optical power of the first lens group, the front principal plane position of the camera lens group can be adjusted to be closer to the object side, thereby effectively reducing the entrance pupil size and ensuring the stability of the field of view (FOV) and chief ray angle (CRA) when the object distance changes; at the same time, this design also helps to reduce the effective diameter of the first lens group and reduce its weight.

[0080] Preferably, the camera lens group satisfies: 1.62 ≤ F1 / fi ≤ 2.50.

[0081] According to some embodiments of the present application, the camera lens group satisfies: -1.55 < fi / F3 < -1.15; where fi is the effective focal length of the camera lens group when the object to be photographed is at infinity from the camera lens group, and F3 is the effective focal length of the third lens group.

[0082] By the third lens group bearing sufficient negative optical power, the back focal length can be effectively shortened, thereby compressing the distance on the optical axis from the object side of the first lens to the imaging plane (TTL); and at the same time, the negative spherical aberration generated by the front first lens group and the second lens group is compensated.

[0083] According to some embodiments of the present application, the camera lens group satisfies: 1.90 < (T23 + T67) / △T < 2.25; where △T is the movable distance on the optical axis of the second lens group when the object to be photographed is at a distance from infinity to 150 mm from the camera lens group, T23 is the air interval on the optical axis from the second lens to the third lens, and T67 is the air interval on the optical axis from the sixth lens to the seventh lens.

[0084] Through the coupled design of the air gap and the stroke movement of the second lens group, the astigmatism change during focusing can be reduced, making the MTF curve remain stable throughout the full stroke.

[0085] According to some embodiments of the present application, the camera lens group satisfies: -1.70 < f2 / f1 < -1.20; where f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens.

[0086] By optimizing the focal power ratio of the positive and negative lenses inside the first lens group, chromatic aberration can be eliminated and off-axis aberration can be reduced, thereby improving the edge resolution.

[0087] According to some embodiments of the present application, the camera lens group satisfies: 1.65 < f1 / R1 < 1.95; 1.45 ≤ R4 / R1 < 2.45; where f1 is the effective focal length of the first lens, R1 is the curvature radius of the object side surface of the first lens, and R4 is the curvature radius of the image side surface of the second lens.

[0088] By controlling the ratio of the curvature to the focal length of the first lens and the curvature ratio of the first lens to the second lens, after converging the light rays, the height value of the entire camera lens group after actual folding can be reduced, which is beneficial to reducing the longitudinal thickness space.

[0089] According to some embodiments of the present application, the camera lens group satisfies: -2.65 ≤ F2 / f4 - F2 / f5 < -1.65; where F2 is the effective focal length of the second lens group, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

[0090] By evenly distributing the focal power combination of different lenses inside the second lens group, the spherical aberration and coma introduced by the focusing movement can be offset, thereby reducing the sensitivity of a single lens.

[0091] According to some embodiments of the present application, the camera lens group satisfies: 0.45 < F2 / f3 < 1.65; where F2 is the effective focal length of the second lens group and f3 is the effective focal length of the third lens.

[0092] By reasonably distributing the effective focal lengths of the second lens group and the third lens group, the change amount of spherical aberration and astigmatism during the focusing movement of the second lens group can be suppressed.

[0093] According to some embodiments of the present application, the camera lens group satisfies: 3.30 < Td2 / (T45 + T56) ≤ 6.80; 1.85 ≤ Td2 / (CT3 + CT4) < 2.60; where Td2 is the distance on the optical axis from the object side of the third lens to the image side of the sixth lens in the second lens group, CT3 is the central thickness of the third lens, CT4 is the central thickness of the fourth lens, T45 is the air gap on the optical axis from the fourth lens to the fifth lens, and T56 is the air gap on the optical axis from the fifth lens to the sixth lens.

[0094] By restricting the thickness of the second lens group, the ratio of the internal thickness to the air gap can be optimized, the thickness gap sensitivity can be reduced, and the mass production yield can be improved.

[0095] According to some embodiments of the present application, the camera lens group satisfies: 1.65 ≤ f3 / R5 < 5.95; -3.75 < f4 / R8 < -1.85; where f3 is the effective focal length of the third lens, R5 is the curvature radius of the object side of the third lens, f4 is the effective focal length of the fourth lens, and R8 is the curvature radius of the image side of the fourth lens.

[0096] By constraining the ratio of the focal length to the curvature radius of the third lens, the curvature of the object side of the third lens can be made gentle, thereby reducing the incident angle of the large-field light and reducing the marginal astigmatism; while strengthening the negative curvature of the image side of the fourth lens can quickly converge the light and compensate for the field curvature change caused by the movement of the second lens group.

[0097] According to some embodiments of the present application, the camera lens group satisfies: -1.45 ≤ R12 / |R11| < -0.10; where R11 is the curvature radius of the object side of the sixth lens and R12 is the curvature radius of the image side of the sixth lens.

[0098] By adopting a meniscus design for the sixth lens and controlling the ratio of the curvature radii of the object side to the image side between -1.45 and -0.10, the curvatures of the object side and the image side can be matched to balance the meridional and sagittal field curvatures (field curvature < 10 μm).

[0099] According to some embodiments of the present application, the camera lens group satisfies: 5.95 ≤ f56 / (CT5 + CT6) ≤ 19.80; where f56 is the combined focal length of the fifth lens and the sixth lens, CT5 is the central thickness of the fifth lens, and CT6 is the central thickness of the sixth lens.

[0100] A high ratio of f56 / (CT5 + CT6) (greater than 5.95) allows the fifth lens and the sixth lens to achieve a strong optical power at a relatively thin thickness (CT5 + CT6 < 1.2 mm), thereby reducing the weight of the second lens group; while f56 / (CT5 + CT6) ≤ 19.80 can prevent insufficient strength due to the lens being too thin.

[0101] According to some embodiments of the present application, the camera lens group satisfies: 0.7 < f5 / f56 < 2.95; where f56 is the combined focal length of the fifth lens and the sixth lens, and f5 is the effective focal length of the fifth lens.

[0102] By controlling the ratio of f5 / f56, the proportion of the optical power of the fifth lens in the combination of the fifth and sixth lenses can be controlled. Specifically, a ratio greater than 0.7 ensures that f5承担主要正光焦度 (承担主要正光焦度 can be translated as "承担 the main positive optical power"), and a ratio less than 2.95 can avoid insufficient dispersion compensation due to the optical power of f6 being too weak.

[0103] According to some embodiments of the present application, the camera lens group satisfies: 0.95 ≤ f9 / F3 ≤ 1.50; where f9 is the effective focal length of the ninth lens, and F3 is the effective focal length of the third lens group.

[0104] The above relationship shows that the ninth lens承担第三透镜组的主要负光焦度 (承担第三透镜组的主要负光焦度 can be translated as "承担 the main negative optical power of the third lens group"), thereby simplifying the structure of the third lens group. At the same time, its strong negative optical power can also compress the back focal length and compensate for the spherical aberration of the first lens group and the second lens group on the front side.

[0105] According to some embodiments of the present application, the camera lens group satisfies: -2.25 < F3 / |f7| + F3 / |f8| < -0.45; where f7 is the effective focal length of the seventh lens, f8 is the effective focal length of the eighth lens, and F3 is the effective focal length of the third lens group.

[0106] By making the combined optical power of the seventh lens and the eighth lens satisfy the negative value range, the overall negative optical power of the third lens group is shared by multiple lenses, thereby reducing the sensitivity of a single lens and optimizing the distortion (distortion < 2%).

[0107] According to some embodiments of the present application, the camera lens group satisfies: 1.05 ≤ F3 / R13 < 4.55; where F3 is the effective focal length of the third lens group, and R13 is the curvature radius of the object side surface of the seventh lens.

[0108] By restricting F3 / R13 > 1.05, the curvature of the object side surface of the seventh lens can be made gentle, thereby reducing the exit angle of the chief ray and ensuring a match with the chief ray angle (CRA) of the sensor (CRA < 25°), and avoiding a decrease in pixel reception efficiency.

[0109] According to some embodiments of this application, the camera lens group satisfies: 1.10 < (CT7 + CT8) / CT9 < 3.05; 1.45 ≤ Td3 / (T78 + T89) < 2.55; where CT7 is the center thickness of the seventh lens, CT8 is the center thickness of the eighth lens, CT9 is the center thickness of the ninth lens, T78 is the air gap between the seventh lens and the eighth lens on the optical axis, T89 is the air gap between the eighth lens and the ninth lens on the optical axis, and Td3 is the distance on the optical axis from the object side of the seventh lens to the image side of the ninth lens in the third lens group.

[0110] By controlling the range of the ratio (CT7+CT8) / CT9, the ratio of the total thickness of the seventh and eighth lenses to the thickness of the ninth lens can be controlled. A ratio greater than 1.10 ensures that the ninth lens is thick enough to handle negative optical power, while a ratio less than 3.05 prevents the total thickness of the seventh and eighth lenses from becoming too thick and increasing weight. In addition, Td3 / (T78+T89) can limit the ratio of the total length of the third lens group to the internal air gap. A ratio less than 2.55 can avoid stray light caused by excessive air gap.

[0111] According to some embodiments of this application, the camera lens group satisfies: 1.55 < (N7 + N8 + N9) / 3 < 1.65; where N7 is the refractive index of the seventh lens, N8 is the refractive index of the eighth lens, and N9 is the refractive index of the ninth lens.

[0112] The third lens group uses a combination of low and high refractive indices, which can effectively suppress the secondary spectrum of telephoto lenses and improve color reproduction (color difference <3μm).

[0113] Preferably, the camera lens group satisfies: 1.57≤(N7+N8+N9) / 3≤1.62.

[0114] According to some embodiments of this application, the camera lens group satisfies: 1.55 < Δf / ΔT < 1.85; where Δf is the difference in the effective focal length of the camera lens group when the distance between the subject and the camera lens group ranges from infinity to 150mm; and ΔT is the movable distance of the second lens group on the optical axis when the distance between the subject and the camera lens group ranges from infinity to 150mm.

[0115] The value of △f / △T indicates that the focal length change (△f) per unit stroke (△T) is highly efficient, thus enabling fast focusing; it covers 150mm macro within a limited stroke, improving stroke utilization while also matching the ratio with the thrust characteristics of the VCM motor, reducing power consumption, and improving motor compatibility.

[0116] The following describes some specific, non-limiting embodiments of the above-described embodiments of this application in more detail with reference to the accompanying drawings. For ease of description, in the following embodiments, OBJ represents the object plane of the camera lens group (not shown in the figures), STO represents the surface of the aperture stop (not shown in the figures), S1 represents the object-side plane of the first lens E1, S2 represents the image-side plane of the first lens E1, P1 represents the object-side plane of the reversing element P, P2 represents the image-side plane of the reversing element P, S3 represents the object-side plane of the second lens E2, S4 represents the image-side plane of the second lens E2, S5 represents the object-side plane of the third lens E3, S6 represents the image-side plane of the third lens E3, S7 represents the object-side plane of the fourth lens E4, S8 represents the image-side plane of the fourth lens E4, and S9 represents the object-side plane of the third lens E4. The object-side surface of lens E5 is shown in the diagram. S10 represents the image-side surface of the fifth lens E5, S11 represents the object-side surface of the sixth lens E6, S12 represents the image-side surface of the sixth lens E6, S13 represents the object-side surface of the seventh lens E7, S14 represents the image-side surface of the seventh lens E7, S15 represents the object-side surface of the eighth lens E8, S16 represents the image-side surface of the eighth lens E8, S17 represents the object-side surface of the ninth lens E9, S18 represents the image-side surface of the ninth lens E9, S19 represents the object-side surface of the filter or protective glass, S20 represents the image-side surface of the filter or protective glass, and S21 represents the imaging surface of the camera lens group.

[0117] Example 1

[0118] like Figure 1 and Figure 2 As shown, in this embodiment, the camera lens group includes a first lens group G1, a second lens group G2, and a third lens group G3 arranged sequentially from the object side to the image side along the optical axis. The first lens group G1 includes a first lens E1, a transition element P, and a second lens E2 arranged sequentially from the object side to the image side along the optical axis. The second lens group G2 includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis. The third lens group G3 includes a seventh lens E7, an eighth lens E8, and a ninth lens E9 arranged sequentially from the object side to the image side along the optical axis.

[0119] In this embodiment, the first lens E1 has positive optical power, and its object-side surface S1 is convex; the second lens E2 has negative optical power, and its image-side surface S4 is concave; the third lens E3 has positive optical power, and both its object-side surface S5 and image-side surface S6 are convex; the fourth lens E4 has negative optical power, and its object-side surface S7 and image-side surface S8 are convex and concave, respectively; the fifth lens E5 has positive optical power, and its object-side surface S9 and image-side surface S8 are convex and concave, respectively. S10 are concave and convex surfaces, respectively; the sixth lens E6 has positive optical power, and the object-side surface S11 and image-side surface S12 of the sixth lens E6 are concave and convex surfaces, respectively; the seventh lens E7 has negative optical power, and the object-side surface S13 and image-side surface S14 of the seventh lens E7 are concave and convex surfaces, respectively; the eighth lens E8 has positive optical power, and the object-side surface S15 and image-side surface S16 of the eighth lens E8 are both convex surfaces; the ninth lens E9 has negative optical power, and the object-side surface S17 and image-side surface S18 of the ninth lens E9 are both concave surfaces.

[0120] In addition, Table 1 shows the basic optical parameters of the camera lens assembly in Embodiment 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0121] Table 1: Basic Optical Parameters of the Camera Lens Assembly in Example 1

[0122] It should be noted that the turning element P is not set as a prism in Table 1, but is equivalently set as a flat element.

[0123] In this embodiment, the first lens E1 and the second lens E2 are respectively bonded to the transition element P. The air gap between the first lens E1 and the transition element P, and the air gap between the second lens E2 and the transition element P in Table 1 are the space reserved for dispensing adhesive.

[0124] In this embodiment, the object-side surface of the first lens E1, the image-side surface of the second lens E2, and the object-side and image-side surfaces of any one of the third to ninth lenses E9 are aspherical, and the surface shape of each aspherical lens... The following aspherical formulas can be used for limitation:

[0125] ;

[0126] in, Let be the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 that can be used for each aspherical mirror S1, and S4 to S18 in Example 1.

[0127] Table 2: Aspherical coefficients of the camera lens assembly in Example 1

[0128]

[0129] When the subject is infinitely far from the camera lens assembly, the on-axis chromatic aberration curve of the camera lens assembly in Example 1 is as follows: Figure 3A As shown, this represents the degree of deviation of the focal point after light of different wavelengths passes through the camera lens assembly; the astigmatism curve of the camera lens assembly in Embodiment 1 is shown below. Figure 3B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve of the camera lens group in Example 1 is as follows. Figure 3C As shown, it indicates the type and size of lens distortion;

[0130] When the subject is 150mm away from the camera lens assembly, the on-axis chromatic aberration curve of the camera lens assembly in Example 1 is as follows: Figure 3D As shown, this represents the degree of deviation of the focal point after light of different wavelengths passes through the camera lens assembly; the astigmatism curve of the camera lens assembly in Embodiment 1 is shown below. Figure 3E As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve of the camera lens group in Example 1 is as follows. Figure 3F As shown, it indicates the type and size of lens distortion;

[0131] according to Figures 3A-3F It can be seen that the camera lens assembly in Example 1 can achieve good imaging quality.

[0132] Example 2

[0133] like Figure 4A as well as Figure 4BAs shown, in this embodiment, the camera lens group includes a first lens group G1, a second lens group G2, and a third lens group G3 arranged sequentially from the object side to the image side along the optical axis. The first lens group G1 includes a first lens E1, a transition element P, and a second lens E2 arranged sequentially from the object side to the image side along the optical axis. The second lens group G2 includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis. The third lens group G3 includes a seventh lens E7, an eighth lens E8, and a ninth lens E9 arranged sequentially from the object side to the image side along the optical axis.

[0134] In this embodiment, the first lens E1 has positive optical power, and its object-side surface S1 is convex; the second lens E2 has negative optical power, and its image-side surface S4 is concave; the third lens E3 has positive optical power, and its object-side surface S5 and image-side surface S6 are convex and concave, respectively; the fourth lens E4 has negative optical power, and its object-side surface S7 and image-side surface S8 are convex and concave, respectively; the fifth lens E5 has positive optical power, and its object-side surface S9 is concave. The object-side surface S11 and image-side surface S12 of the sixth lens E6 are both convex surfaces; the object-side surface S13 and image-side surface S14 of the seventh lens E7 are both concave surfaces; the eighth lens E8 has positive optical power, and the object-side surface S15 and image-side surface S16 of the eighth lens E8 are concave and convex surfaces, respectively; the ninth lens E9 has negative optical power, and the object-side surface S17 and image-side surface S18 of the ninth lens E9 are convex and concave surfaces, respectively.

[0135] In addition, Table 3 shows the basic optical parameters of the camera lens assembly in Embodiment 2, wherein the units of radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0136] Table 3: Basic optical parameters of the camera lens assembly in Example 2

[0137]

[0138] It should be noted that the turning element P is not set as a prism in Table 3, but is equivalently set as a flat element.

[0139] In this embodiment, the first lens E1 and the second lens E2 are respectively bonded to the transition element P. The air gap between the first lens E1 and the transition element P, and the air gap between the second lens E2 and the transition element P in Table 3 are the space reserved for dispensing adhesive.

[0140] In this embodiment, the object-side surface of the first lens E1, the image-side surface of the second lens E2, and the object-side and image-side surfaces of any one of the third to ninth lenses E9 are aspherical. The surface shape of each aspherical lens can be defined by the aspherical formula given in Embodiment 1 above. Table 4 below shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, and A26 that can be used for each aspherical mirror S1 and S4 to S18 in Embodiment 2.

[0141] Table 4: Aspherical coefficients of the camera lens assembly in Example 2

[0142]

[0143] When the subject is infinitely far from the camera lens assembly, the on-axis chromatic aberration curve of the camera lens assembly in Example 2 is as follows: Figure 5A As shown, it represents the degree of deviation of the focal point after light of different wavelengths passes through the camera lens assembly; the astigmatism curve of the camera lens assembly in Example 2 is shown below. Figure 5B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve of the camera lens group in Example 2 is as follows. Figure 5C As shown, it indicates the type and size of lens distortion;

[0144] When the subject is 150mm away from the camera lens assembly, the on-axis chromatic aberration curve of the camera lens assembly in Example 2 is as follows: Figure 5D As shown, it represents the degree of deviation of the focal point after light of different wavelengths passes through the camera lens assembly; the astigmatism curve of the camera lens assembly in Example 2 is shown below. Figure 5E As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve of the camera lens group in Example 2 is as follows. Figure 5F As shown, it indicates the type and size of lens distortion;

[0145] according to Figures 5A-5F It can be seen that the camera lens assembly in Embodiment 2 can achieve good imaging quality.

[0146] Example 3

[0147] like Figure 6A as well as Figure 6BAs shown, in this embodiment, the camera lens group includes a first lens group G1, a second lens group G2, and a third lens group G3 arranged sequentially from the object side to the image side along the optical axis. The first lens group G1 includes a first lens E1, a transition element P, and a second lens E2 arranged sequentially from the object side to the image side along the optical axis. The second lens group G2 includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis. The third lens group G3 includes a seventh lens E7, an eighth lens E8, and a ninth lens E9 arranged sequentially from the object side to the image side along the optical axis.

[0148] In this embodiment, the first lens E1 has positive optical power, and its object-side surface S1 is convex; the second lens E2 has negative optical power, and its image-side surface S4 is concave; the third lens E3 has positive optical power, and its object-side surface S5 and image-side surface S6 are convex and concave, respectively; the fourth lens E4 has negative optical power, and its object-side surface S7 and image-side surface S8 are convex and concave, respectively; the fifth lens E5 has positive optical power, and its object-side surface S9 and image-side surface S1 are concave and concave, respectively. The objects of the sixth lens E6 are convex and concave, respectively; the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are concave and convex, respectively; the seventh lens E7 has positive optical power, and the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are concave and convex, respectively; the eighth lens E8 has negative optical power, and the object-side surface S15 and the image-side surface S16 of the eighth lens E8 are convex and concave, respectively; the ninth lens E9 has negative optical power, and the object-side surface S17 and the image-side surface S18 of the ninth lens E9 are convex and concave, respectively.

[0149] In addition, Table 5 shows the basic optical parameters of the camera lens assembly in Embodiment 3, wherein the units of radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0150] Table 5: Basic optical parameters of the camera lens assembly in Example 3

[0151]

[0152] It should be noted that the turning element P is not set as a prism in Table 5, but is equivalently set as a flat element.

[0153] In this embodiment, the first lens E1 and the second lens E2 are respectively bonded to the transition element P. The air gap between the first lens E1 and the transition element P, and the air gap between the second lens E2 and the transition element P in Table 5 are the space reserved for dispensing adhesive.

[0154] In this embodiment, the object-side surface of the first lens E1, the image-side surface of the second lens E2, and the object-side and image-side surfaces of any one of the third to ninth lenses E9 are aspherical. The surface shape of each aspherical lens can be defined by the aspherical formula given in Embodiment 1 above. Table 6 below shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S1 and S4 to S18 in Embodiment 3.

[0155] Table 6: Aspherical coefficients of the camera lens assembly in Example 3

[0156]

[0157] When the subject is infinitely far from the camera lens assembly, the on-axis chromatic aberration curve of the camera lens assembly in Example 3 is as follows: Figure 7A As shown, it represents the degree of deviation of the focal point after light of different wavelengths passes through the camera lens assembly; the astigmatism curve of the camera lens assembly in Example 3 is shown below. Figure 7B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve of the camera lens group in Example 3 is as follows. Figure 7C As shown, it indicates the type and size of lens distortion;

[0158] When the subject is 150mm away from the camera lens assembly, the on-axis chromatic aberration curve of the camera lens assembly in Example 3 is as follows: Figure 7D As shown, it represents the degree of deviation of the focal point after light of different wavelengths passes through the camera lens assembly; the astigmatism curve of the camera lens assembly in Example 3 is shown below. Figure 7E As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve of the camera lens group in Example 3 is as follows. Figure 7F As shown, it indicates the type and size of lens distortion;

[0159] according to Figures 7A-7F It can be seen that the camera lens assembly in Embodiment 3 can achieve good imaging quality.

[0160] Example 4

[0161] like Figure 8A as well as Figure 8BAs shown, in this embodiment, the camera lens group includes a first lens group G1, a second lens group G2, and a third lens group G3 arranged sequentially from the object side to the image side along the optical axis. The first lens group G1 includes a first lens E1, a transition element P, and a second lens E2 arranged sequentially from the object side to the image side along the optical axis. The second lens group G2 includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis. The third lens group G3 includes a seventh lens E7, an eighth lens E8, and a ninth lens E9 arranged sequentially from the object side to the image side along the optical axis.

[0162] In this embodiment, the first lens E1 has positive optical power, and its object-side surface S1 is convex; the second lens E2 has negative optical power, and its image-side surface S4 is concave; the third lens E3 has positive optical power, and its object-side surface S5 and image-side surface S6 are convex and concave, respectively; the fourth lens E4 has negative optical power, and its object-side surface S7 and image-side surface S8 are convex and concave, respectively; the fifth lens E5 has positive optical power, and its object-side surface S9 and image-side surface S8 are convex and concave, respectively. S10 are convex and concave surfaces respectively; the sixth lens E6 has positive optical power, and the object-side surface S11 and image-side surface S12 of the sixth lens E6 are concave and convex surfaces respectively; the seventh lens E7 has positive optical power, and the object-side surface S13 and image-side surface S14 of the seventh lens E7 are concave and convex surfaces respectively; the eighth lens E8 has negative optical power, and the object-side surface S15 and image-side surface S16 of the eighth lens E8 are concave and convex surfaces respectively; the ninth lens E9 has negative optical power, and the object-side surface S17 and image-side surface S18 of the ninth lens E9 are both concave surfaces.

[0163] In addition, Table 7 shows the basic optical parameters of the camera lens assembly in Embodiment 4, wherein the units of radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0164] Table 7: Basic Optical Parameters of the Camera Lens Assembly in Example 4

[0165]

[0166] It should be noted that the turning element P is not set as a prism in Table 7, but is equivalently set as a flat element.

[0167] In this embodiment, the first lens E1 and the second lens E2 are respectively bonded to the transition element P. The air gap between the first lens E1 and the transition element P, and the air gap between the second lens E2 and the transition element P in Table 7 are the space reserved for dispensing adhesive.

[0168] In this embodiment, the object-side surface of the first lens E1, the image-side surface of the second lens E2, and the object-side and image-side surfaces of any one of the third to ninth lenses E9 are aspherical. The surface shape of each aspherical lens can be defined by the aspherical formula given in Embodiment 1 above. Table 8 below shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S1 and S4 to S18 in Embodiment 4.

[0169] Table 8: Aspherical coefficients of the camera lens assembly in Example 4

[0170]

[0171] When the subject is infinitely far from the camera lens assembly, the on-axis chromatic aberration curve of the camera lens assembly in Example 4 is as follows: Figure 9A As shown, it represents the degree of deviation of the focal point after light of different wavelengths passes through the camera lens assembly; the astigmatism curve of the camera lens assembly in Example 4 is shown below. Figure 9B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve of the camera lens group in Example 4 is as follows. Figure 9C As shown, it indicates the type and size of lens distortion;

[0172] When the subject is 150mm away from the camera lens assembly, the on-axis chromatic aberration curve of the camera lens assembly in Example 4 is as follows: Figure 9D As shown, it represents the degree of deviation of the focal point after light of different wavelengths passes through the camera lens assembly; the astigmatism curve of the camera lens assembly in Example 4 is shown below. Figure 9E As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve of the camera lens group in Example 4 is as follows. Figure 9F As shown, it indicates the type and size of lens distortion;

[0173] according to Figures 9A-9F It can be seen that the camera lens assembly in Embodiment 4 can achieve good imaging quality.

[0174] Example 5

[0175] like Figure 10A as well as Figure 10BAs shown, in this embodiment, the camera lens group includes a first lens group G1, a second lens group G2, and a third lens group G3 arranged sequentially from the object side to the image side along the optical axis. The first lens group G1 includes a first lens E1, a transition element P, and a second lens E2 arranged sequentially from the object side to the image side along the optical axis. The second lens group G2 includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis. The third lens group G3 includes a seventh lens E7, an eighth lens E8, and a ninth lens E9 arranged sequentially from the object side to the image side along the optical axis.

[0176] In this embodiment, the first lens E1 has positive optical power, and its object-side surface S1 is convex; the second lens E2 has negative optical power, and its image-side surface S4 is concave; the third lens E3 has positive optical power, and its object-side surface S5 and image-side surface S6 are convex and concave, respectively; the fourth lens E4 has negative optical power, and its object-side surface S7 and image-side surface S8 are convex and concave, respectively; the fifth lens E5 has positive optical power, and its object-side surface S9 and image-side surface S8 are convex and concave, respectively. S10 are concave and convex surfaces, respectively; the sixth lens E6 has negative optical power, and the object-side surface S11 and image-side surface S12 of the sixth lens E6 are concave and convex surfaces, respectively; the seventh lens E7 has negative optical power, and the object-side surface S13 and image-side surface S14 of the seventh lens E7 are concave and convex surfaces, respectively; the eighth lens E8 has positive optical power, and the object-side surface S15 and image-side surface S16 of the eighth lens E8 are both convex surfaces; the ninth lens E9 has negative optical power, and the object-side surface S17 and image-side surface S18 of the ninth lens E9 are convex and concave surfaces, respectively.

[0177] In addition, Table 9 shows the basic optical parameters of the camera lens assembly of Embodiment 5, wherein the units of radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0178] Table 9: Basic Optical Parameters of the Camera Lens Assembly in Example 5

[0179]

[0180] It should be noted that the turning element P is not set as a prism in Table 9, but is equivalently set as a flat element.

[0181] In this embodiment, the first lens E1 and the second lens E2 are respectively bonded to the transition element P. The air gap between the first lens E1 and the transition element P, and the air gap between the second lens E2 and the transition element P in Table 9 are the space reserved for dispensing adhesive.

[0182] In this embodiment, the object-side surface of the first lens E1, the image-side surface of the second lens E2, and the object-side and image-side surfaces of any one of the third to ninth lenses E9 are aspherical. The surface shape of each aspherical lens can be defined by the aspherical formula given in Embodiment 1 above. Table 10 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S1 and S4 to S18 in Embodiment 5.

[0183] Table 10: Aspherical coefficients of the camera lens assembly in Example 5

[0184]

[0185] When the subject is infinitely far from the camera lens assembly, the on-axis chromatic aberration curve of the camera lens assembly in Example 5 is as follows: Figure 11A As shown, it represents the degree of deviation of the focal point after light of different wavelengths passes through the camera lens assembly; the astigmatism curve of the camera lens assembly in Example 5 is shown below. Figure 11B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve of the camera lens group in Example 5 is as follows. Figure 11C As shown, it indicates the type and size of lens distortion;

[0186] When the subject is 150mm away from the camera lens assembly, the on-axis chromatic aberration curve of the camera lens assembly in Example 5 is as follows: Figure 11D As shown, it represents the degree of deviation of the focal point after light of different wavelengths passes through the camera lens assembly; the astigmatism curve of the camera lens assembly in Example 5 is shown below. Figure 11E As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve of the camera lens group in Example 5 is as follows. Figure 11F As shown, it indicates the type and size of lens distortion;

[0187] according to Figures 11A-11F It can be seen that the camera lens assembly in Embodiment 5 can achieve good imaging quality.

[0188] In addition, such as Figure 12 As shown, based on Embodiment 5, the deflection element P can be set as a triangular prism. Table 11 shows the basic optical parameters of the camera lens assembly when the deflection element P is set as a triangular prism at infinity object distance, based on Embodiment 5, where the units of radius of curvature, thickness / distance, and effective radius are all millimeters (mm).

[0189] Table 11: Basic optical parameters of the camera lens assembly when the turning element P is a triangular prism in Example 5

[0190]

[0191] In this embodiment, the first lens E1 and the second lens E2 are respectively bonded to the transition element P. The air gap between the first lens E1 and the transition element P, and the air gap between the second lens E2 and the transition element P in Table 11 are the space reserved for dispensing adhesive.

[0192] In summary, in Examples 1 to 5, the effective focal lengths f1 to f9 of the first lens E1 to the fourth lens E9 in the camera lens group, the effective focal length fi of the camera lens group when the subject is at infinity, the effective focal lengths F1 to F3 of the first lens group G1 to the third lens group G3 in the camera lens group, the difference Δf of the effective focal lengths of the camera lens group when the subject is at infinity to 150mm, the aperture coefficient Fno of the camera lens group, and half of the maximum field of view (Semi-FOV) of the camera lens group are shown in Table 12 below.

[0193] Table 12: System Optical Parameters of Camera Lens Assembly

[0194]

[0195] In summary, the camera lens groups in Examples 1 to 5 satisfy the relationships shown in Table 13, as detailed in Table 13.

[0196] Table 13: Structural Parameters of Camera Lens Assembly

[0197]

[0198] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0199] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A camera lens assembly, characterized in that: Including, arranged in sequence from the object side to the image side along the optical axis direction: a first lens group with positive optical power, a second lens group with positive optical power, and a third lens group with negative optical power; The first lens group includes, arranged in sequence from the object side to the image side along the optical axis direction: a first lens with positive optical power, whose object side surface is convex; a turning element without optical power; a second lens with negative optical power, whose image side surface is concave; The second lens group includes, arranged in sequence from the object side to the image side along the optical axis direction: a third lens with positive optical power, whose object side surface is convex; a fourth lens with negative optical power, whose object side surface is convex and image side surface is concave; a fifth lens with positive optical power; a sixth lens with optical power, whose image side surface is convex; The third lens group includes, arranged in sequence from the object side to the image side along the optical axis direction: a seventh lens with optical power, whose object side surface is concave; an eighth lens with optical power; a ninth lens with negative optical power, whose image side surface is concave; The second lens group can move along the optical axis direction, and the camera lens group satisfies: 5.90≤TTL / △f<7.50; 1.25<(F1+F3) / F2<2.40; Where, △f is the difference in the effective focal length of the camera lens group when the object distance from the camera lens group changes from infinity to 150mm; F1 is the effective focal length of the first lens group, F2 is the effective focal length of the second lens group, F3 is the effective focal length of the third lens group, and TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface.

2. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 1.60<F1 / fi≤2.50; where, fi is the effective focal length of the camera lens group when the object distance from the camera lens group is at infinity; F1 is the effective focal length of the first lens group.

3. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: -1.55<fi / F3<-1.15; where, fi is the effective focal length of the camera lens group when the object distance from the camera lens group is at infinity; F3 is the effective focal length of the third lens group.

4. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 1.90<(T23+T67) / △T<2.25; where, △T is the movable distance on the optical axis of the second lens group when the object distance from the camera lens group changes from infinity to 150mm; T23 is the air gap on the optical axis between the second lens and the third lens, and T67 is the air gap on the optical axis between the sixth lens and the seventh lens.

5. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: -1.70<f2 / f1<-1.20; where, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.

6. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 1.65<f1 / R1<1.95; 1.45≤R4 / R1<2.45; where, f1 is the effective focal length of the first lens, R1 is the curvature radius of the object side surface of the first lens, and R4 is the curvature radius of the image side surface of the second lens.

7. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: -2.65 ≤ F2 / f4 - F2 / f5 < -1.65; where F2 is the effective focal length of the second lens group, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

8. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 0.45 < F2 / f3 < 1.65; where F2 is the effective focal length of the second lens group, and f3 is the effective focal length of the third lens.

9. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 3.30 < Td2 / (T45 + T56) ≤ 6.80; 1.85 ≤ Td2 / (CT3 + CT4) < 2.60; where Td2 is the distance on the optical axis from the object side of the third lens in the second lens group to the image side of the sixth lens, CT3 is the central thickness of the third lens, CT4 is the central thickness of the fourth lens, T45 is the air gap on the optical axis from the fourth lens to the fifth lens, and T56 is the air gap on the optical axis from the fifth lens to the sixth lens.

10. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 1.65 ≤ f3 / R5 < 5.95; -3.75 < f4 / R8 < -1.85; where f3 is the effective focal length of the third lens, R5 is the radius of curvature of the object side of the third lens, f4 is the effective focal length of the fourth lens, and R8 is the radius of curvature of the image side of the fourth lens.

11. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: -1.45 ≤ R12 / |R11| < -0.10; where R11 is the radius of curvature of the object side of the sixth lens, and R12 is the radius of curvature of the image side of the sixth lens.

12. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 5.95 ≤ f56 / (CT5 + CT6) ≤ 19.80; where f56 is the combined focal length of the fifth lens and the sixth lens, CT5 is the central thickness of the fifth lens, and CT6 is the central thickness of the sixth lens.

13. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 0.7 < f5 / f56 < 2.95; where f56 is the combined focal length of the fifth lens and the sixth lens, and f5 is the effective focal length of the fifth lens.

14. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 0.95 ≤ f9 / F3 ≤ 1.50; where f9 is the effective focal length of the ninth lens, and F3 is the effective focal length of the third lens group.

15. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: -2.25 < F3 / |f7| + F3 / |f8| < -0.45; where f7 is the effective focal length of the seventh lens, f8 is the effective focal length of the eighth lens, and F3 is the effective focal length of the third lens group.

16. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 1.05 ≤ F3 / R13 < 4.55; where F3 is the effective focal length of the third lens group, and R13 is the radius of curvature of the object side of the seventh lens.

17. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 1.10 < (CT7 + CT8) / CT9 < 3.05; 1.45 ≤ Td3 / (T78 + T89) < 2.55; where CT7 is the center thickness of the seventh lens, CT8 is the center thickness of the eighth lens, CT9 is the center thickness of the ninth lens, T78 is the air gap between the seventh lens and the eighth lens on the optical axis, T89 is the air gap between the eighth lens and the ninth lens on the optical axis, and Td3 is the distance on the optical axis from the object side of the seventh lens to the image side of the ninth lens in the third lens group.

18. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 1.55 < (N7 + N8 + N9) / 3 < 1.65; where N7 is the refractive index of the seventh lens, N8 is the refractive index of the eighth lens, and N9 is the refractive index of the ninth lens.

19. The camera lens assembly according to claim 1, characterized in that, The camera lens group satisfies: 1.55 < Δf / ΔT < 1.85; where Δf is the difference in the effective focal length of the camera lens group when the distance between the subject and the camera lens group ranges from infinity to 150mm; and ΔT is the movable distance of the second lens group on the optical axis when the distance between the subject and the camera lens group ranges from infinity to 150mm.

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