Camera lens set

Abstract

The present invention provides a camera lens assembly having only six lenses. The camera lens assembly comprises, from the object side to the image side, a first lens group having positive focal power and including at least a first lens and a second lens, the first lens having positive focal power; a second lens group including at least a fifth lens and a sixth lens, the fifth lens having positive focal power and the sixth lens having negative focal power. When a subject moves closer to the camera lens assembly, the position of the second lens group on the optical axis of the camera lens assembly is moved to achieve focus adjustment. The effective focal length F1 of the first lens group and the difference ΔT between the air spacing on the optical axis between the first lens group and the second lens group when the camera lens assembly is in a telephoto position and a macro position satisfy the following conditions: 2.5 ≤ F1 / (|ΔT|*10) ≤ 8.0. The present invention solves the problem in the prior art of ensuring imaging quality at different object distances in camera lens assemblies.

Description

Technical Field

[0001] The present invention relates to the technical field of imaging equipment, and in particular to a camera lens assembly. Background Art

[0002] With the development of diverse photography styles, macro photography has become a popular new technique among photography enthusiasts, and macro photography works are also widely loved in the field of photography. The development of macro photography has created an urgent need for the development of camera lenses that can adapt to different object distances. However, existing camera lenses often fail to balance the quality of images at both long and short distances. Significant differences in aberrations occur at different object distances, and resolution rarely approaches the ideal design value, making it impossible to guarantee consistently high image quality.

[0003] That is to say, the existing camera lens assembly has the problem that it is difficult to ensure the imaging quality at different object distances. Summary of the Invention

[0004] The main purpose of the present invention is to provide a camera lens assembly to solve the problem in the prior art that the imaging quality of the camera lens assembly is difficult to ensure at different object distances.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a camera lens group is provided, which has only six lenses. The camera lens group includes, from the object side to the image side, a first lens group, which has positive optical focal length, and the first lens group includes at least a first lens and a second lens, and the first lens has positive optical focal length; a second lens group, which includes at least a fifth lens and a sixth lens, and the fifth lens has positive optical focal length, and the sixth lens has negative optical focal length; wherein, when the object moves closer to the camera lens group, the position of the second lens group on the optical axis of the camera lens group is moved to achieve focus adjustment; the effective focal length F1 of the first lens group and the difference △T of the air gap between the first lens group and the second lens group on the optical axis when the camera lens group is in the telephoto position and the macro position satisfy the following conditions: 2.5≤F1 / (|△T|*10)≤8.0.

[0006] Furthermore, the effective focal length F1 of the first lens group and the effective focal length F2 of the second lens group satisfy the following relationship: 0.5 <F1 / |F2|<1.0。

[0007] Furthermore, when the camera lens group is in the telephoto position and the macro position, the difference ΔT between the air gaps between the first lens group and the second lens group on the optical axis of the camera lens group and the sum ∑CT of the center thicknesses of the first lens to the sixth lens on the optical axis satisfy the following relationship: 0.3≤10*|ΔT| / ∑CT<0.5.

[0008] Furthermore, the effective focal length f1 of the first lens and the effective focal length F1 of the first lens group satisfy: 0.8 <f1 / F1<1.2。

[0009] Furthermore, the effective focal length F2 of the second lens group and the effective focal length f6 of the sixth lens group satisfy the relationship: -4.0≤|F2| / f6<-1.2.

[0010] Furthermore, the distance TTL from the object side of the first lens to the imaging plane of the camera lens group on the optical axis and the sum of the center thicknesses of the lenses with optical power in the first lens group ΣCTF1 satisfy the following relationship: 3.0 <TTL / ∑CTF1<5.0。

[0011] Furthermore, the sum ∑CTF1 of the center thicknesses of the lenses having optical power in the first lens group, the sum ∑CTF2 of the center thicknesses of the lenses having optical power in the second lens group, the effective focal length F1 of the first lens group, and the effective focal length F2 of the second lens group satisfy the following relationship: 1.0≤|∑CTF1-∑CTF2| / (1 / F1+1 / |F2|)<2.5.

[0012] Furthermore, the effective focal length F1 of the first lens group, the effective focal length F2 of the second lens group, and the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis satisfy the following relationship: 1.4≤(F1+|F2|) / TTL<3.0.

[0013] Furthermore, the effective focal length fi of the camera lens group at the telephoto position, the center thickness CT5 of the fifth lens, and the center thickness CT6 of the sixth lens satisfy the following relationship: 2.5 <fi / (CT5+CT6)<5.5。

[0014] Furthermore, the effective focal length f1 of the first lens and the center thickness CT1 of the first lens satisfy: 1.5 mm 2 <f1*CT1<3.0mm 2 .

[0015] Furthermore, the effective focal length f5 of the fifth lens and the center thickness CT5 of the fifth lens satisfy: 1.0 mm 2 <f5*CT5<3.5mm 2 .

[0016] Furthermore, when the camera lens group is at the telephoto position, the distance BFLi from the image side surface of the sixth lens to the imaging plane of the camera lens group on the optical axis and the effective focal length fi of the camera lens group at the telephoto position satisfy the following conditions: 0.2 <BFLi / fi<0.5。

[0017] Furthermore, the effective focal length fi of the camera lens group at the telephoto position, the center thickness CT3 of the third lens, and the center thickness CT4 of the fourth lens satisfy the following relationship: 2.5 <fi / (CT3+CT4)<4.0。

[0018] Furthermore, a difference ΔFOV between the maximum field angles of the camera lens assembly at the telephoto position and the macro position satisfies: 0<10*tan(|ΔFOV|)≤0.3.

[0019] According to another aspect of the present invention, a camera lens group is provided, which has only six lenses. The camera lens group includes, from the object side to the image side, a first lens group, the first lens group has positive focal length, and the first lens group includes at least a first lens and a second lens, the first lens has positive focal length; a second lens group, the second lens group includes at least a fifth lens and a sixth lens, the fifth lens has positive focal length, and the sixth lens has negative focal length; wherein, when the object moves closer to the camera lens group, the position of the second lens group on the optical axis of the camera lens group is moved to achieve focus adjustment; the effective focal length fi of the camera lens group at the telephoto position, the center thickness CT3 of the third lens, and the center thickness CT4 of the fourth lens satisfy the following relationship: 2.5 <fi / (CT3+CT4)<4.0。

[0020] Furthermore, the effective focal length F1 of the first lens group and the effective focal length F2 of the second lens group satisfy the following relationship: 0.5 <F1 / |F2|<1.0。

[0021] Furthermore, when the camera lens group is in the telephoto position and the macro position, the difference ΔT between the air gaps between the first lens group and the second lens group on the optical axis of the camera lens group and the sum ∑CT of the center thicknesses of the first lens to the sixth lens on the optical axis satisfy the following relationship: 0.3≤10*|ΔT| / ∑CT<0.5.

[0022] Furthermore, the effective focal length f1 of the first lens and the effective focal length F1 of the first lens group satisfy: 0.8 <f1 / F1<1.2。

[0023] Furthermore, the effective focal length F2 of the second lens group and the effective focal length f6 of the sixth lens group satisfy the relationship: -4.0≤|F2| / f6<-1.2.

[0024] Furthermore, the distance TTL from the object side of the first lens to the imaging plane of the camera lens group on the optical axis and the sum of the center thicknesses of the lenses with optical power in the first lens group ΣCTF1 satisfy the following relationship: 3.0 <TTL / ∑CTF1<5.0。

[0025] Furthermore, the sum ∑CTF1 of the center thicknesses of the lenses having optical power in the first lens group, the sum ∑CTF2 of the center thicknesses of the lenses having optical power in the second lens group, the effective focal length F1 of the first lens group, and the effective focal length F2 of the second lens group satisfy the following relationship: 1.0≤|∑CTF1-∑CTF2| / (1 / F1+1 / |F2|)<2.5.

[0026] Furthermore, the effective focal length F1 of the first lens group, the effective focal length F2 of the second lens group, and the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis satisfy the following relationship: 1.4≤(F1+|F2|) / TTL<3.0.

[0027] Furthermore, the effective focal length fi of the camera lens group at the telephoto position, the center thickness CT5 of the fifth lens, and the center thickness CT6 of the sixth lens satisfy the following relationship: 2.5 <fi / (CT5+CT6)<5.5。

[0028] Furthermore, the effective focal length f1 of the first lens and the center thickness CT1 of the first lens satisfy: 1.5 mm 2 <f1*CT1<3.0mm 2 .

[0029] Furthermore, the effective focal length f5 of the fifth lens and the center thickness CT5 of the fifth lens satisfy: 1.0 mm 2 <f5*CT5<3.5mm 2 .

[0030] Furthermore, when the camera lens group is at the telephoto position, the distance BFLi from the image side surface of the sixth lens to the imaging plane of the camera lens group on the optical axis and the effective focal length fi of the camera lens group at the telephoto position satisfy the following conditions: 0.2 <BFLi / fi<0.5。

[0031] Furthermore, a difference ΔFOV between the maximum field angles of the camera lens assembly at the telephoto position and the macro position satisfies: 0<10*tan(|ΔFOV|)≤0.3.

[0032] By applying the technical solution of the present invention, the camera lens group has only six lenses, and the camera lens group includes a first lens group and a second lens group in sequence from the object side to the image side, the first lens group has positive optical focal length, and the first lens group includes at least a first lens and a second lens, and the first lens has positive optical focal length; the second lens group includes at least a fifth lens and a sixth lens, the fifth lens has positive optical focal length, and the sixth lens has negative optical focal length; wherein, when the object moves closer to the camera lens group, the position of the second lens group on the optical axis of the camera lens group is moved to achieve focus adjustment; the effective focal length F1 of the first lens group and the difference △T of the air gap between the first lens group and the second lens group on the optical axis when the camera lens group is in the telephoto position and the macro position satisfy the following conditions: 2.5≤F1 / (|△T|*10)≤8.0.

[0033] By making the second lens group movable along the optical axis, the focal length of the camera lens assembly can be adjusted to achieve clear images at varying object distances. By limiting F1 / (|△T|*10) to a reasonable range, the relationship between the effective focal length of the first lens group and the amount of movement of the second lens group can be adjusted, which helps balance aberrations between telephoto and close-up positions, improving the designed MTF (Modulation Transfer Function) value for different object distances, ensuring that the camera lens assembly maintains high image quality at all object distances. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0035] Figure 1 A schematic structural diagram of a camera lens assembly according to Example 1 of the present invention is shown;

[0036] Figures 2 to 4 Shown respectively Figure 1 The on-axis chromatic aberration curve, astigmatism curve and distortion curve of the camera lens group in the close-up position;

[0037] Figures 5 to 7 Shown respectively Figure 1 The on-axis chromatic aberration curve, astigmatism curve and distortion curve of the camera lens group in the telephoto position;

[0038] Figure 8 A schematic structural diagram of a camera lens assembly according to Example 2 of the present invention is shown;

[0039] Figures 9 to 11 Shown respectively Figure 8 The on-axis chromatic aberration curve, astigmatism curve and distortion curve of the camera lens group in the close-up position;

[0040] Figures 12 to 14Shown respectively Figure 8 The on-axis chromatic aberration curve, astigmatism curve and distortion curve of the camera lens group in the telephoto position;

[0041] Figure 15 A schematic structural diagram of a camera lens assembly according to Example 3 of the present invention is shown;

[0042] Figures 16 to 18 Shown respectively Figure 15 The on-axis chromatic aberration curve, astigmatism curve and distortion curve of the camera lens group in the close-up position;

[0043] Figures 19 to 21 Shown respectively Figure 15 The on-axis chromatic aberration curve, astigmatism curve and distortion curve of the camera lens group in the telephoto position;

[0044] Figure 22 A schematic structural diagram of a camera lens assembly according to Example 4 of the present invention is shown;

[0045] Figures 23 to 25 Shown respectively Figure 22 The on-axis chromatic aberration curve, astigmatism curve and distortion curve of the camera lens group in the close-up position;

[0046] Figures 26 to 28 Shown respectively Figure 22 The on-axis chromatic aberration curve, astigmatism curve and distortion curve of the camera lens group in the telephoto position;

[0047] Figure 29 A schematic structural diagram of a camera lens assembly according to Example 5 of the present invention is shown;

[0048] Figures 30 to 32 Shown respectively Figure 29 The on-axis chromatic aberration curve, astigmatism curve and distortion curve of the camera lens group in the close-up position;

[0049] Figures 33 to 35 Shown respectively Figure 29 The on-axis chromatic aberration curve, astigmatism curve and distortion curve of the camera lens group in the telephoto position.

[0050] The above drawings include the following reference numerals:

[0051] G1, first lens group; G2, second lens group; STO, aperture; E1, first lens; S1, object-side surface of the first lens; S2, image-side surface of the first lens; E2, second lens; S3, object-side surface of the second lens; S4, image-side surface of the second lens; E3, third lens; S5, object-side surface of the third lens; S6, image-side surface of the third lens; E4, fourth lens; S7, object-side surface of the fourth lens; S8, image-side surface of the fourth lens; E5, fifth lens; S9, object-side surface of the fifth lens; S10, image-side surface of the fifth lens; E6, sixth lens; S11, object-side surface of the sixth lens; S12, image-side surface of the sixth lens; E7, filter; S13, object-side surface of the filter; S14, image-side surface of the filter; S15, imaging surface. DETAILED DESCRIPTION

[0052] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0053] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0054] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0055] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0056] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0057] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The surface of each lens close to the object side is called the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The judgment of the surface shape in the paraxial area can be based on the judgment method of common knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity. In terms of the object side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; in terms of the image side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0058] In order to solve the problem in the prior art that imaging quality of a camera lens assembly is difficult to ensure at different object distances, the present invention provides a camera lens assembly.

[0059] Example 1

[0060] like Figures 1 to 35 As shown, the camera lens group has only six lenses, and the camera lens group includes a first lens group and a second lens group in sequence from the object side to the image side, the first lens group has positive optical focal length, and the first lens group includes at least a first lens and a second lens, and the first lens has positive optical focal length; the second lens group includes at least a fifth lens and a sixth lens, the fifth lens has positive optical focal length, and the sixth lens has negative optical focal length; wherein, when the object moves closer to the camera lens group, the position of the second lens group on the optical axis of the camera lens group is moved to achieve focus adjustment; the effective focal length F1 of the first lens group and the difference △T of the air gap between the first lens group and the second lens group on the optical axis when the camera lens group is in the telephoto position and the macro position satisfy the following: 2.5≤F1 / (|△T|*10)≤8.0.

[0061] By making the second lens group movable along the optical axis, the focal length of the camera lens assembly can be adjusted to achieve clear images at varying object distances. By limiting F1 / (|△T|*10) to a reasonable range, the relationship between the effective focal length of the first lens group and the amount of movement of the second lens group can be adjusted, which helps balance aberrations between telephoto and close-up positions, improving the designed MTF (Modulation Transfer Function) value for different object distances, ensuring that the camera lens assembly maintains high image quality at all object distances.

[0062] Preferably, the effective focal length F1 of the first lens group and the difference ΔT between the air gaps between the first lens group and the second lens group on the optical axis when the camera lens group is at the telephoto position and the macro position satisfy: 2.56≤F1 / (|ΔT|*10)≤7.93.

[0063] In this embodiment, the effective focal length F1 of the first lens group and the effective focal length F2 of the second lens group satisfy: 0.5 < F1 / |F2| < 1.0. By restricting F1 / |F2| within a reasonable range, the relationship between the effective focal length of the first lens group and that of the second lens group can be balanced, which is beneficial to optimizing and improving the shooting performance of the camera lens group at the close-up position. Preferably, 0.7 < F1 / |F2| < 1.0; more preferably, 0.75 ≤ F1 / |F2| ≤ 0.91.

[0064] In this embodiment, the difference △T between the air gaps of the first lens group and the second lens group on the optical axis of the camera lens group at the telephoto position and the close-up position, and the sum ∑CT of the central thicknesses of the first lens to the sixth lens on the optical axis satisfy: 0.3 ≤ 10*|△T| / ∑CT < 0.5. By restricting 10*|△T| / ∑CT within a reasonable range, the distance change between the first lens group and the second lens group at the telephoto position and the close-up position can be controlled, and the moving distance of the module focusing when the object distance changes can be minimized to a great extent, which is beneficial to improving the stability of the image. Preferably, 0.30 ≤ 10*|△T| / ∑CT ≤ 0.37.

[0065] In this embodiment, the effective focal length f1 of the first lens and the effective focal length F1 of the first lens group satisfy: 0.8 < f1 / F1 < 1.2. By restricting f1 / F1 within a reasonable range, the proportion of the effective focal length of the first lens in the first lens group can be reasonably distributed, and the aberration of the first lens group can be preliminarily corrected, thereby correcting the comprehensive aberration of the camera lens group. Preferably, 0.84 ≤ f1 / F1 ≤ 1.13.

[0066] In this embodiment, the effective focal length F of the second lens group and the effective focal length f6 of the sixth lens satisfy: -4.0 ≤ |F2| / f6 < -1.2. By restricting |F2| / f6 within a reasonable range, the proportion of the effective focal length of the sixth lens in the second lens group can be restricted, and the spherical aberration, coma aberration and astigmatism corresponding to different object distances of the camera lens group can be corrected by using the advantages of the second lens group, so that the imaging quality at different object distances can be improved. Preferably, -3.95 ≤ |F2| / f6 ≤ -1.47.

[0067] In this embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis and the total sum ∑CTF1 of the central thicknesses of the lenses with optical power in the first lens group satisfy: 3.0 < TTL / ∑CTF1 < 5.0. By restricting TTL / ∑CTF1 within a reasonable range, the relationship between the thickness of the first lens group and the height of the camera lens group can be constrained, facilitating the setting of the optical power within a controllable advantageous range, enhancing the strength of the lens, and reducing the sensitivity of the lens. Preferably, 3.14 ≤ TTL / ∑CTF1 ≤ 4.81.

[0068] In this embodiment, the total sum ∑CTF1 of the central thicknesses of the lenses with optical power in the first lens group, the total sum ∑CTF2 of the central thicknesses of the lenses with optical power in the second lens group, the effective focal length F1 of the first lens group, and the effective focal length F2 of the second lens group satisfy: 1.0 ≤ |∑CTF1 - ∑CTF2| / (1 / F1 + 1 / |F2|) < 2.5. By restricting |∑CTF1 - ∑CTF2| / (1 / F1 + 1 / |F2|) within a reasonable range, the relationship of the effective focal lengths between the first lens group and the second lens group can be reasonably allocated. Under the condition of ensuring the processability of lens processing, the performance of the camera lens group when shooting at different object distances can be improved, the aberration of imaging can be reduced, and the imaging quality can be enhanced. Preferably, 1.06 ≤ |∑CTF1 - ∑CTF2| / (1 / F1 + 1 / |F2|) ≤ 2.16.

[0069] In this embodiment, the effective focal length F1 of the first lens group, the effective focal length F2 of the second lens group, and the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis satisfy: 1.4 ≤ (F1 + |F2|) / TTL < 3.0. By restricting (F1 + |F2|) / TTL within a reasonable range, it is beneficial to reasonably allocate the relationship between the first lens group, the second lens group and the height of the camera lens group, optimize and improve spherical aberration, astigmatism, and field curvature, and enhance the imaging quality. Preferably, 1.42 ≤ (F1 + |F2|) / TTL ≤ 2.70.

[0070] In this embodiment, the effective focal length fi of the camera lens group at the telephoto position, the central thickness CT5 of the fifth lens, and the central thickness CT6 of the sixth lens satisfy: 2.5 < fi / (CT5 + CT6) < 5.5. By restricting fi / (CT5 + CT6) within a reasonable range, the distribution of the optical power of the fifth lens and the sixth lens can be indirectly constrained and improved, and the meridional astigmatism and distortion caused by the fifth lens and the sixth lens can be optimized and improved. While ensuring the imaging quality of the camera lens group at the close - up position, the imaging quality of the camera lens group at the telephoto position can be enhanced. Preferably, 2.66 ≤ fi / (CT5 + CT6) ≤ 5.01.

[0071] In this embodiment, the effective focal length f1 of the first lens and the central thickness CT1 of the first lens satisfy: 1.5mm 2 <f1 * CT1 < 3.0mm 2 . By restricting f1 * CT1 within a reasonable range, it is beneficial to optimize and improve the distribution of the optical power of the first lens in the entire camera lens group, beneficial to increasing the aperture of the camera lens group, and further increasing the light transmission amount, thereby improving the imaging quality when the ambient light is poor. Preferably, 1.60mm 2 ≤f1 * CT1 ≤ 2.88mm 2 .

[0072] In this embodiment, the effective focal length f5 of the fifth lens and the central thickness CT5 of the fifth lens satisfy: 1.0mm 2 <f5 * CT5 < 3.5mm 2 . By restricting f5 * CT5 within a reasonable range, it is beneficial to the distribution of the optical power of the fifth lens in the entire camera lens group, and further beneficial to reducing the spherical aberration, coma, and chromatic aberration caused by the fifth lens, thereby achieving the correction of the comprehensive aberration of the camera lens group. Preferably, 1.35mm 2 ≤f5 * CT5 ≤ 3.22mm 2 .

[0073] In this embodiment, the distance BFLi on the optical axis between the image side of the sixth lens and the imaging surface of the camera lens group when the camera lens group is at the telephoto position and the effective focal length fi of the camera lens group when it is at the telephoto position satisfy: 0.2 < BFLi / fi < 0.5. By restricting BFLi / fi within a reasonable range, it is possible to ensure a reasonable proportional distribution relationship between the object and image spaces, and further achieve a certain degree of constraint on the imaging magnification. Preferably, 0.25 ≤ BFLi / fi ≤ 0.43.

[0074] In this embodiment, the effective focal length fi of the camera lens group when it is at the telephoto position, the central thickness CT3 of the third lens, and the central thickness CT4 of the fourth lens satisfy: 2.5 < fi / (CT3 + CT4) < 4.0. By restricting fi / (CT3 + CT4) within a reasonable range, it is beneficial to make full use of the aberration correction effects of the third lens and the fourth lens, and further achieve the improvement of the performance of the camera lens group. Preferably, 2.83 ≤ fi / (CT3 + CT4) ≤ 3.69.

[0075] In this embodiment, the difference ΔFOV between the maximum field angles of view of the camera lens group at the telephoto position and the close-up position satisfies: 0 < 10 * tan(|ΔFOV|) ≤ 0.3. By restricting 10 * tan(|ΔFOV|) within a reasonable range, the variation relationship between the field angles of view of the camera lens group at the telephoto position and the close-up position can be constrained, indirectly constraining and improving the variable of the module movement when shooting at different object distances, which is beneficial to maintaining stability during the object distance switching of the picture shooting. Preferably, 0.01 ≤ 10 * tan(|ΔFOV|) ≤ 0.28.

[0076] Embodiment Two

[0077] As Figures 1 to 35 shown, the camera lens group only has six lenses. The camera lens group sequentially includes from the object side to the image side: a first lens group and a second lens group. The first lens group has a positive optical power. The first lens group at least includes a first lens and a second lens, and the first lens has a positive optical power. The second lens group at least includes a fifth lens and a sixth lens. The fifth lens has a positive optical power, and the sixth lens has a negative optical power. Among them, when the object to be photographed moves closer to the camera lens group, the position of the second lens group on the optical axis of the camera lens group is moved to achieve focus adjustment. The effective focal length fi of the camera lens group at the telephoto position, the central thickness CT3 of the third lens, and the central thickness CT4 of the fourth lens satisfy: 2.5 < fi / (CT3 + CT4) < 4.0.

[0078] Setting the second lens group to be movable on the optical axis can adjust the focal length of the camera lens group to achieve clear imaging in cooperation with different object distances. By restricting fi / (CT3 + CT4) within a reasonable range, it is beneficial to make full use of the aberration correction effects of the third lens and the fourth lens, thereby improving the performance of the camera lens group.

[0079] Preferably, the effective focal length fi of the camera lens group at the telephoto position, the central thickness CT3 of the third lens, and the central thickness CT4 of the fourth lens satisfy: 2.83 ≤ fi / (CT3 + CT4) ≤ 3.69.

[0080] In this embodiment, the effective focal length F1 of the first lens group and the effective focal length F2 of the second lens group satisfy: 0.5 < F1 / |F2| < 1.0. By restricting F1 / |F2| within a reasonable range, the relationship between the effective focal length of the first lens group and the effective focal length of the second lens group can be balanced, which is beneficial to optimizing and improving the shooting performance of the camera lens group at the close-up position. Preferably, 0.7 < F1 / |F2| < 1.0; further preferably, 0.75 ≤ F1 / |F2| ≤ 0.91.

[0081] In this embodiment, the difference △T in the air gap between the first lens group and the second lens group on the optical axis of the camera lens group at the telephoto position and the close-up position, and the sum ∑CT of the central thicknesses of the first lens to the sixth lens on the optical axis satisfy: 0.3 ≤ 10 * |△T| / ∑CT < 0.5. By restricting 10 * |△T| / ∑CT within a reasonable range, the change in the distance between the first lens group and the second lens group at the telephoto position and the close-up position can be controlled, and the moving distance of the module focus when the object distance changes can be minimized to a great extent, which is beneficial to improving the stability of the image. Preferably, 0.30 ≤ 10 * |△T| / ∑CT ≤ 0.37.

[0082] In this embodiment, the effective focal length f1 of the first lens and the effective focal length F1 of the first lens group satisfy: 0.8 < f1 / F1 < 1.2. By restricting f1 / F1 within a reasonable range, the proportion of the effective focal length of the first lens in the first lens group can be reasonably distributed, and the aberration of the first lens group can be preliminarily corrected, thereby correcting the comprehensive aberration of the camera lens group. Preferably, 0.84 ≤ f1 / F1 ≤ 1.13.

[0083] In this embodiment, the effective focal length F2 of the second lens group and the effective focal length f6 of the sixth lens satisfy: -4.0 ≤ |F2| / f6 < -1.2. By restricting |F2| / f6 within a reasonable range, the proportion of the effective focal length of the sixth lens in the second lens group can be constrained, and the spherical aberration, coma, and astigmatism corresponding to different object distances of the camera lens group can be corrected by utilizing the advantages of the second lens group, so that the imaging quality at different object distances can be improved. Preferably, -3.95 ≤ |F2| / f6 ≤ -1.47.

[0084] In this embodiment, the distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the camera lens group, and the sum ∑CTF1 of the central thicknesses of the lenses with optical power in the first lens group satisfy: 3.0 < TTL / ∑CTF1 < 5.0. By restricting TTL / ∑CTF1 within a reasonable range, the relationship between the thickness of the first lens group and the height of the camera lens group can be constrained, facilitating setting the optical power within a controllable and advantageous range, while enhancing the strength of the lens and reducing the sensitivity of the lens. Preferably, 3.14 ≤ TTL / ∑CTF1 ≤ 4.81.

[0085] In this embodiment, the sum of the central thicknesses ∑CTF1 of the lenses with optical power in the first lens group, the sum of the central thicknesses ∑CTF2 of the lenses with optical power in the second lens group, the effective focal length F1 of the first lens group, and the effective focal length F2 of the second lens group satisfy: 1.0 ≤ |∑CTF1 - ∑CTF2| / (1 / F1 + 1 / |F2|) < 2.5. By restricting |∑CTF1 - ∑CTF2| / (1 / F1 + 1 / |F2|) within a reasonable range, the relationship of the effective focal lengths between the first lens group and the second lens group can be reasonably distributed, and under the condition of ensuring the lens processing performance, the performance of the camera lens group when shooting at different object distances can be improved, the aberration of the imaging can be reduced, and the imaging quality can be improved. Preferably, 1.06 ≤ |∑CTF1 - ∑CTF2| / (1 / F1 + 1 / |F2|) ≤ 2.16.

[0086] In this embodiment, the effective focal length F1 of the first lens group, the effective focal length F2 of the second lens group, and the distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the camera lens group satisfy: 1.4 ≤ (F1 + |F2|) / TTL < 3.0. By restricting (F1 + |F2|) / TTL within a reasonable range, it is beneficial to reasonably distribute the relationship between the first lens group and the second lens group and the height of the camera lens group, optimize and improve spherical aberration, astigmatism, and field curvature, and improve the imaging quality. Preferably, 1.42 ≤ (F1 + |F2|) / TTL ≤ 2.70.

[0087] In this embodiment, when the camera lens group is at the telephoto position, the effective focal length fi, the central thickness CT5 of the fifth lens, and the central thickness CT6 of the sixth lens satisfy: 2.5 < fi / (CT5 + CT6) < 5.5. By restricting fi / (CT5 + CT6) within a reasonable range, the distribution of the optical power of the fifth lens and the sixth lens can be indirectly restricted and improved, and the meridional astigmatism and distortion caused by the fifth lens and the sixth lens can be optimized and improved. While ensuring the imaging quality of the camera lens group at the close - up position, the imaging quality of the camera lens group at the telephoto position can be improved. Preferably, 2.66 ≤ fi / (CT5 + CT6) ≤ 5.01.

[0088] In this embodiment, the effective focal length f1 of the first lens and the central thickness CT1 of the first lens satisfy: 1.5mm 2 < f1*CT1 < 3.0mm 2 . By restricting f1*CT1 within a reasonable range, it is beneficial to optimize and improve the distribution of the optical power of the first lens in the entire camera lens group, beneficial to increase the aperture of the camera lens group, and then increase the light - passing amount, and improve the imaging quality when the ambient light is poor. Preferably, 1.60mm 2 ≤ f1*CT1 ≤ 2.88mm 2 .

[0089] In this embodiment, the effective focal length f5 of the fifth lens and the central thickness CT5 of the fifth lens satisfy: 1.0 mm 2 < f5 * CT5 < 3.5 mm 2 . By restricting f5 * CT5 within a reasonable range, it is beneficial to the distribution of the optical power of the fifth lens in the entire camera lens group, and further beneficial to reducing spherical aberration, coma, and chromatic aberration caused by the fifth lens, thereby achieving the correction of the overall aberration of the camera lens group. Preferably, 1.35 mm 2 ≤ f5 * CT5 ≤ 3.22 mm 2 .

[0090] In this embodiment, the distance BFLi on the optical axis from the image side of the sixth lens to the imaging surface of the camera lens group when the camera lens group is at the telephoto position and the effective focal length fi of the camera lens group when it is at the telephoto position satisfy: 0.2 < BFLi / fi < 0.5. By restricting BFLi / fi within a reasonable range, it can ensure a reasonable proportional distribution relationship between the object and image spaces, and thereby achieve a certain degree of constraint on the imaging magnification. Preferably, 0.25 ≤ BFLi / fi ≤ 0.43.

[0091] In this embodiment, the difference △FOV between the maximum field angles of the camera lens group at the telephoto position and the close-up position satisfies: 0 < 10 * tan(|△FOV|) ≤ 0.3. By restricting 10 * tan(|△FOV|) within a reasonable range, it can constrain the variation relationship of the field angles of the camera lens group at the telephoto position and the close-up position, indirectly constrain and improve the variable of the module movement when shooting at different object distances, and is beneficial to maintaining the stability of the picture shooting when switching the object distance of the picture shooting. Preferably, 0.01 ≤ 10 * tan(|△FOV|) ≤ 0.28.

[0092] Optionally, the above camera lens group may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0093] The camera lens group in this application can adopt multiple lenses, such as the six lenses mentioned above. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial distance between each lens, etc., the aperture of the camera lens group can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, making the camera lens group more conducive to production and processing and applicable to portable electronic devices such as smartphones.

[0094] In the present application, at least one of the mirror surfaces of each lens is an aspheric mirror surface. The characteristic of an aspheric lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspheric lens has a better curvature radius characteristic, which has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspheric lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. However, it should be understood by those skilled in the art that, without departing from the technical solution claimed for protection in this application, the number of lenses constituting the camera lens group can be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiment, the camera lens group is not limited to including six lenses. If necessary, the camera lens group can also include other numbers of lenses.

[0095] The following further describes examples of specific surface shapes and parameters of the camera lens assembly applicable to the above-mentioned embodiment with reference to the accompanying drawings.

[0096] It should be noted that any one of the following examples 1 to 5 is applicable to all embodiments of the present application.

[0097] Example 1

[0098] like Figures 1 to 7 As shown, the camera lens group of Example 1 of the present application is described. Figure 1 A schematic diagram showing the structure of a camera lens assembly of Example 1 is shown.

[0099] like Figure 1 As shown, the camera lens group includes, from the object side to the image side, a first lens group G1, a second lens group G2, a filter E7, and an imaging surface S15. The first lens group G1 includes a first lens E1, an aperture STO, and a second lens E2. The second lens group G2 includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6.

[0100] The first lens group G1 has positive optical power. The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The optical filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15 .

[0101] Table 1 shows the basic structural parameter table of the camera lens group of Example 1, wherein the units of the curvature radius, thickness / distance, effective focal length and effective radius are all in millimeters (mm). The 370mm in the left column of the thickness column means that the camera lens group is in the telephoto position, and the distance between the subject and the camera lens group is 370mm, while the 100mm in the right column of the thickness column means that the camera lens group is in the close-up position, and the distance between the subject and the camera lens group is 100mm.

[0102]

[0103]

[0104] Table 1

[0105] In Example 1, the object-side surface and the image-side surface of any lens from the first lens E1 to the sixth lens E6 are both aspherical surfaces. The surface shape of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0106]

[0107] Where x is the distance vector from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; and Ai is the correction coefficient for the i-th order of the aspheric surface. Table 2 below lists 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 aspheric mirror surface S1-S12 in Example 1.

[0108]

[0109]

[0110] Table 2

[0111] Figure 2 The axial chromatic aberration curve of the camera lens assembly of Example 1 is shown when it is in a close-up position, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 3 The astigmatism curve of the camera lens group of Example 1 at the close-up position is shown, which indicates the meridional image curvature and the sagittal image curvature. Figure 4 The distortion curve of the camera lens assembly of Example 1 at the close-up position is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0112] Figure 5 The axial chromatic aberration curve of the camera lens assembly of Example 1 at the telephoto position is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 6 The astigmatism curve of the camera lens group of Example 1 at the telephoto position is shown, which indicates the meridional image curvature and the sagittal image curvature. Figure 7 The distortion curve of the camera lens assembly of Example 1 at the telephoto position is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0113] according to Figures 2 to 7 It can be seen that the camera lens set given in Example 1 can achieve good imaging quality.

[0114] Example 2

[0115] like Figures 8 to 14 As shown, the camera lens group of Example 2 of the present application is described. Figure 8 The following is a schematic diagram showing the structure of the camera lens assembly of Example 2. For the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0116] like Figure 8 As shown, the camera lens group includes, from the object side to the image side, an aperture stop STO, a first lens group G1, a second lens group G2, a filter E7, and an imaging surface S15. The first lens group G1 includes a first lens E1, a second lens E2, and a third lens E3; the second lens group G2 includes a fourth lens E4, a fifth lens E5, and a sixth lens E6.

[0117] The first lens group G1 has positive optical power. The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The optical filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15 .

[0118] Table 3 shows the basic structural parameter table of the camera lens group of Example 2, wherein the units of the curvature radius, thickness / distance, effective focal length and effective radius are all in millimeters (mm). The 370mm in the left column of the thickness column means that the camera lens group is in the telephoto position, and the distance between the subject and the camera lens group is 370mm, while the 100mm in the right column of the thickness column means that the camera lens group is in the close-up position, and the distance between the subject and the camera lens group is 100mm.

[0119]

[0120] Table 3

[0121] Table 4 gives the high-order coefficients of each aspheric mirror surface that can be used in Example 2, wherein the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0122]

[0123]

[0124] Table 4

[0125] Figure 9 The axial chromatic aberration curve of the camera lens assembly of Example 2 is shown when it is in a macro position, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 10 The astigmatism curve of the camera lens group of Example 2 at the close-up position is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 11 The distortion curve of the camera lens assembly of Example 2 at the close-up position is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0126] Figure 12The axial chromatic aberration curve of the camera lens assembly of Example 2 at the telephoto position is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 13 The astigmatism curve of the camera lens assembly of Example 2 at the telephoto position is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 14 The distortion curve of the camera lens assembly of Example 2 at the telephoto position is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0127] according to Figures 9 to 14 It can be seen that the camera lens assembly given in Example 2 can achieve good imaging quality.

[0128] Example 3

[0129] like Figures 15 to 21 As shown, the camera lens group of Example 3 of the present application is described. Figure 15 A schematic diagram showing the structure of a camera lens group of Example 3 is shown.

[0130] like Figure 15 As shown, the camera lens group includes, from the object side to the image side, an aperture stop STO, a first lens group G1, a second lens group G2, a filter E7, and an imaging surface S15. The first lens group G1 includes a first lens E1, a second lens E2, and a third lens E3; the second lens group G2 includes a fourth lens E4, a fifth lens E5, and a sixth lens E6.

[0131] The first lens group G1 has positive optical power. The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The optical filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15 .

[0132] Table 5 shows the basic structural parameter table of the camera lens group of Example 3, wherein the units of the curvature radius, thickness / distance, effective focal length and effective radius are all in millimeters (mm). The left column 370mm in the thickness column means that the camera lens group is in the telephoto position, and the distance between the subject and the camera lens group is 370mm, while the right column 99mm in the thickness column means that the camera lens group is in the close-up position, and the distance between the subject and the camera lens group is 99mm.

[0133]

[0134]

[0135] Table 5

[0136] Table 6 gives the high-order coefficients that can be used for each aspheric mirror surface in Example 3, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0137]

[0138]

[0139] Table 6

[0140] Figure 16 The axial chromatic aberration curve of the camera lens assembly of Example 3 is shown in the macro position, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 17 The astigmatism curve of the camera lens group of Example 3 at the close-up position is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 18 The distortion curve of the camera lens assembly of Example 3 at the close-up position is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0141] Figure 19 The axial chromatic aberration curve of the camera lens assembly of Example 3 at the telephoto position is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 20 The astigmatism curve of the camera lens group of Example 3 at the telephoto position is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 21 The distortion curve of the camera lens assembly of Example 3 at the telephoto position is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0142] according to Figures 16 to 21 It can be seen that the camera lens assembly given in Example 3 can achieve good imaging quality.

[0143] Example 4

[0144] like Figures 22 to 28 As shown, the camera lens group of Example 4 of the present application is described. Figure 22A schematic diagram showing the structure of a camera lens group of Example 4 is shown.

[0145] like Figure 22 As shown, the camera lens group includes, from the object side to the image side, an aperture stop STO, a first lens group G1, a second lens group G2, a filter E7, and an imaging surface S15. The first lens group G1 includes a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4; the second lens group G2 includes a fifth lens E5 and a sixth lens E6.

[0146] The first lens group G1 has positive optical power. The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The optical filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15 .

[0147] Table 7 shows the basic structural parameter table of the camera lens group of Example 4, wherein the units of the curvature radius, thickness / distance, effective focal length and effective radius are all in millimeters (mm). The left column 370mm in the thickness column means that the camera lens group is in the telephoto position, and the distance between the subject and the camera lens group is 370mm, while the right column 90mm in the thickness column means that the camera lens group is in the close-up position, and the distance between the subject and the camera lens group is 90mm.

[0148]

[0149]

[0150] Table 7

[0151] Table 8 gives the high-order coefficients that can be used for each aspheric mirror surface in Example 4, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0152] Face number A4 A6 A8 A10 A12 A14 A16 S1 -8.9421E-03 4.1930E+00 -9.5209E+01 1.2752E+03 -1.1065E+04 6.4819E+04 -2.6133E+05 S2 2.6887E-01 -3.7567E+00 4.1417E+01 -3.3553E+02 1.9450E+03 -7.9292E+03 2.2385E+04 S3 1.9595E-01 -3.6053E+00 3.9183E+01 -3.2881E+02 2.0504E+03 -9.2924E+03 3.0267E+04 S4 -9.7704E-02 1.3501E-01 -2.7000E-01 1.4943E+00 -2.3933E+01 1.7322E+02 -6.7451E+02 S5 7.5093E-03 3.9314E+00 -7.7830E+01 8.8685E+02 -6.7581E+03 3.5800E+04 -1.3442E+05 S6 2.0283E-01 -1.8260E-01 -4.5907E+00 4.2470E+01 -1.9976E+02 6.0221E+02 -1.2473E+03 S7 7.5927E-02 -9.8290E-01 4.1313E+00 -1.0718E+01 1.9644E+01 -2.6221E+01 2.5593E+01 S8 5.7799E-02 -7.4450E-01 2.3015E+00 -4.4535E+00 4.7630E+00 -2.6350E-01 -8.0826E+00 S9 2.0682E-01 -6.3992E-01 1.7139E+00 -2.9098E+00 2.9831E+00 -1.2773E+00 -1.0846E+00 S10 -1.6338E-02 8.2535E-02 -4.2949E-01 1.3133E+00 -2.4376E+00 3.0650E+00 -2.7064E+00 S11 9.0190E-01 -2.0885E+00 2.8654E+00 -1.9278E+00 -7.0295E-01 2.9854E+00 -3.2979E+00 S12 7.1072E-01 -1.9027E+00 2.9823E+00 -3.2007E+00 2.4165E+00 -1.3010E+00 5.0325E-01 Face number A18 A20 A22 A24 A26 A28 A30 S1 7.2631E+05 -1.3672E+06 1.6645E+06 -1.1826E+06 3.7235E+05 0.0000E+00 0.0000E+00 S2 -4.2676E+04 5.2312E+04 -3.7162E+04 1.1616E+04 0.0000E+00 0.0000E+00 0.0000E+00 S3 -6.9871E+04 1.1135E+05 -1.1636E+05 7.1688E+04 -1.9725E+04 0.0000E+00 0.0000E+00 S4 1.5499E+03 -2.1109E+03 1.5766E+03 -4.9612E+02 0.0000E+00 0.0000E+00 0.0000E+00 S5 3.5973E+05 -6.8087E+05 8.8955E+05 -7.6235E+05 3.8529E+05 -8.6948E+04 0.0000E+00 S6 1.8172E+03 -1.8617E+03 1.3137E+03 -6.0785E+02 1.6601E+02 -2.0281E+01 0.0000E+00 S7 -1.8147E+01 9.1921E+00 -3.2242E+00 7.3967E-01 -9.9134E-02 5.8296E-03 0.0000E+00 S8 1.4476E+01 -1.4309E+01 9.1835E+00 -3.9195E+00 1.0776E+00 -1.7314E-01 1.2374E-02 S9 2.3286E+00 -2.0149E+00 1.0692E+00 -3.7012E-01 8.1922E-02 -1.0569E-02 6.0597E-04 S10 1.6934E+00 -7.4592E-01 2.2592E-01 -4.4704E-02 5.1867E-03 -2.6636E-04 0.0000E+00 S11 2.1571E+00 -9.3963E-01 2.8057E-01 -5.6952E-02 7.5295E-03 -5.8553E-04 2.0337E-05 S12 -1.3989E-01 2.7663E-02 -3.7947E-03 3.4306E-04 -1.8377E-05 4.4175E-07 0.0000E+00

[0153] Table 8

[0154] Figure 23The axial chromatic aberration curve of the camera lens set of Example 4 at the macro position is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 24 The astigmatism curve of the camera lens group of Example 4 at the macro position is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 25 The distortion curve of the camera lens assembly of Example 4 at the close-up position is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0155] Figure 26 The axial chromatic aberration curve of the camera lens assembly of Example 4 at the telephoto position is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 27 The astigmatism curve of the camera lens group of Example 4 at the telephoto position is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 28 The distortion curve of the camera lens assembly of Example 4 at the telephoto position is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0156] according to Figures 23 to 28 It can be seen that the camera lens assembly given in Example 4 can achieve good imaging quality.

[0157] Example 5

[0158] like Figures 29 to 35 As shown, the camera lens set of Example 5 of the present application is described. Figure 29 A schematic diagram showing the structure of a camera lens group of Example 5 is shown.

[0159] like Figure 29 As shown, the camera lens group includes, from the object side to the image side, an aperture stop STO, a first lens group G1, a second lens group G2, a filter E7, and an imaging surface S15. The first lens group G1 includes a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4; the second lens group G2 includes a fifth lens E5 and a sixth lens E6.

[0160] The first lens group G1 has positive optical power. The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The optical filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15 .

[0161] Table 9 shows the basic structural parameter table of the camera lens group of Example 5, wherein the units of curvature radius, thickness / distance, effective focal length and effective radius are all in millimeters (mm). The left column 370mm in the thickness column means that the camera lens group is in the telephoto position, and the distance between the subject and the camera lens group is 370mm, while the right column 100mm in the thickness column means that the camera lens group is in the close-up position, and the distance between the subject and the camera lens group is 100mm.

[0162]

[0163]

[0164] Table 9

[0165] Table 10 gives the high-order coefficients that can be used for each aspheric mirror surface in Example 5, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0166] Face number A4 A6 A8 A10 A12 A14 A16 S1 8.5997E-02 -4.5861E-02 1.7578E-02 -3.7552E-02 -9.5680E-08 -2.3261E-08 -1.2520E-08 S2 -8.9848E-02 3.9004E+00 -5.5376E+01 4.9721E+02 -2.9785E+03 1.2085E+04 -3.3219E+04 S3 -2.2743E-01 3.2219E+00 -4.5545E+01 4.3385E+02 -2.8515E+03 1.3131E+04 -4.2705E+04 S4 -1.8258E-01 3.8074E-01 -3.0291E-01 -1.0345E+01 8.4242E+01 -3.4573E+02 8.4746E+02 S5 -1.2848E-01 4.0980E+00 -6.9111E+01 7.2798E+02 -5.1880E+03 2.5778E+04 -9.0798E+04 S6 1.4051E-01 -3.4275E-01 -2.7003E+00 3.2433E+01 -1.6192E+02 4.9711E+02 -1.0316E+03 S7 1.1984E-01 -1.3268E+00 6.0493E+00 -1.7579E+01 3.6033E+01 -5.3632E+01 5.8432E+01 S8 -7.7948E-03 -2.7926E-01 1.2997E+00 -5.6558E+00 1.7789E+01 -3.7852E+01 5.5478E+01 S9 7.5559E-02 4.4132E-02 -6.3774E-01 2.0371E+00 -3.5951E+00 4.0870E+00 -3.1780E+00 S10 -7.7442E-03 7.3591E-02 -8.2807E-02 -1.1415E-01 6.5438E-01 -1.1957E+00 1.2624E+00 S11 3.6862E-01 -6.0063E-01 -1.0782E-01 2.2704E+00 -5.3897E+00 7.6641E+00 -7.4565E+00 S12 3.9769E-01 -7.9301E-01 8.3348E-01 -6.0716E-01 3.4291E-01 -1.6060E-01 6.2584E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 -8.4262E-10 -1.4184E-09 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 6.0696E+04 -7.0257E+04 4.6349E+04 -1.3174E+04 0.0000E+00 0.0000E+00 0.0000E+00 S3 9.7721E+04 -1.5414E+05 1.5985E+05 -9.8309E+04 2.7225E+04 0.0000E+00 0.0000E+00 S4 -1.2496E+03 1.0420E+03 -4.0006E+02 2.5261E+01 0.0000E+00 0.0000E+00 0.0000E+00 S5 2.2766E+05 -4.0294E+05 4.9095E+05 -3.9096E+05 1.8273E+05 -3.7909E+04 0.0000E+00 S6 1.4922E+03 -1.5089E+03 1.0465E+03 -4.7424E+02 1.2628E+02 -1.4941E+01 0.0000E+00 S7 -4.6503E+01 2.6704E+01 -1.0765E+01 2.8882E+00 -4.6279E-01 3.3485E-02 0.0000E+00 S8 -5.7223E+01 4.1960E+01 -2.1780E+01 7.8264E+00 -1.8520E+00 2.5953E-01 -1.6311E-02 S9 1.7315E+00 -6.6176E-01 1.7389E-01 -2.9910E-02 3.0294E-03 -1.3678E-04 0.0000E+00 S10 -8.6799E-01 4.0319E-01 -1.2608E-01 2.5497E-02 -3.0172E-03 1.5891E-04 0.0000E+00 S11 5.1348E+00 -2.5225E+00 8.7778E-01 -2.1128E-01 3.3450E-02 -3.1337E-03 1.3163E-04 S12 -1.9347E-02 4.4695E-03 -7.2882E-04 7.8441E-05 -4.9759E-06 1.4057E-07 0.0000E+00

[0167] Table 10

[0168] Figure 30 The axial chromatic aberration curve of the camera lens set of Example 5 is shown when it is in the macro position, which indicates that the light of different wavelengths deviates from the focal point behind the lens. Figure 31 The astigmatism curve of the camera lens group of Example 5 at the close-up position is shown, which indicates the meridional image curvature and the sagittal image curvature. Figure 32 The distortion curve of the camera lens assembly of Example 5 at the close-up position is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0169] Figure 33The axial chromatic aberration curve of the camera lens assembly of Example 5 at the telephoto position is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 34 The astigmatism curve of the camera lens group of Example 5 at the telephoto position is shown, which indicates the meridional image curvature and the sagittal image curvature. Figure 35 The distortion curve of the camera lens assembly of Example 5 at the telephoto position is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0170] according to Figures 30 to 35 It can be seen that the camera lens assembly given in Example 5 can achieve good imaging quality.

[0171] In summary, Examples 1 to 5 respectively satisfy the relationships shown in Table 11.

[0172] Conditional / Example 1 2 3 4 5 F1 / (|△T|*10) 2.56 6.49 5.81 6.61 7.93 F1 / |F2| 0.79 0.75 0.91 0.91 0.78 10*△T / ∑CT 0.37 0.33 0.36 0.32 0.30 f1 / F1 1.07 0.97 1.13 0.84 0.93 |F2| / f6 -1.47 -2.71 -3.95 -2.64 -2.47 TTL / ∑CTF1 4.04 4.19 4.81 3.14 3.33 |∑CTF1-∑CTF2| / (1 / F1+1 / |F2|) 1.27 1.06 1.77 1.75 2.16 (F1+|F2|) / TTL 1.42 2.70 2.30 2.35 2.67 fi / (CT5+CT6) 5.01 2.86 2.66 2.83 3.15 f1*CT1 2.88 2.21 2.52 1.60 1.91 f5*CT5 3.22 1.35 1.44 1.85 2.30 BFLi / fi 0.25 0.35 0.43 0.33 0.27 fi / (CT3+CT4) 3.35 3.69 3.61 2.83 3.04 10*tan(|△FOV|) 0.12 0.18 0.28 0.04 0.01

[0173] Table 11

[0174] Table 12 gives the effective focal length of each lens of the camera lens group of Examples 1 to 5, where fi is the effective focal length of the camera lens group when it is in the telephoto position, FOVi is the maximum field of view angle of the camera lens group when it is in the telephoto position, and FOVm is the maximum field of view angle of the camera lens group when it is in the macro position.

[0175] Parameters / Examples 1 2 3 4 5 f1(mm) 3.21 5.36 6.55 4.93 5.81 f2(mm) 23.26 -7.75 -6.76 -10.77 -13.72 f3(mm) 6.09 8.23 5.82 -8.39 -11.44 f4(mm) -8.9 -4.0 -22.6 5.8 6.9 f5(mm) 9.58 1.76 1.64 2.28 3.20 f6(mm) -2.58 -2.73 -1.61 -2.42 -3.24 fi(mm) 3.91 3.16 3.29 3.06 3.12 FOVi(°) 79.6 88.2 92.1 85.0 83.7 FOVm(°) 78.2 90.2 95.3 85.4 83.9

[0176] Table 12

[0177] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the camera lens assembly described above.

[0178] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0179] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0180] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0181] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A camera lens assembly, characterized in that: The camera lens group has only six lenses, and the camera lens group includes, from the object side to the image side, the following lenses: a first lens group, the first lens group having positive refractive power, the first lens group including at least a first lens and a second lens, the first lens having positive refractive power, and the object-side surface of the first lens being a convex surface; a second lens group, the second lens group including at least a fifth lens and a sixth lens, the fifth lens having positive refractive power, the image side surface of the fifth lens being convex, the sixth lens having negative refractive power, the image side surface of the sixth lens being concave; When the object moves closer to the camera lens group, the position of the second lens group on the optical axis of the camera lens group is moved to achieve focus adjustment; The effective focal length fi of the camera lens assembly at the telephoto position, the center thickness CT3 of the third lens, and the center thickness CT4 of the fourth lens satisfy the following: 2.83≤fi / (CT3+CT4)≤3.69; The effective focal length F1 of the first lens group and the effective focal length F2 of the second lens group satisfy the following: 0.75≤F1 / |F2|≤0.

91.

2. The camera lens assembly according to claim 1, wherein: When the camera lens group is at the telephoto position and the macro position, the difference ΔT between the air spacing between the first lens group and the second lens group on the optical axis of the camera lens group and the sum ∑CT of the center thicknesses of the first lens to the sixth lens on the optical axis satisfy the following: 0.30≤10*|ΔT| / ∑CT≤0.

37.

3. The camera lens assembly according to claim 1, wherein: The effective focal length f1 of the first lens and the effective focal length F1 of the first lens group satisfy: 0.8 <f1 / F1≤1.13。 4. The camera lens assembly according to claim 1, wherein: The effective focal length F2 of the second lens group and the effective focal length f6 of the sixth lens group satisfy the following: -3.95≤|F2| / f6≤-1.

47.

5. The camera lens assembly according to claim 1, wherein: A distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis and a sum ΣCTF1 of the center thicknesses of lenses with optical power in the first lens group satisfy the following: 3.14≤TTL / ΣCTF1≤4.

81.

6. The camera lens assembly according to claim 1, wherein: The sum ∑CTF1 of the center thicknesses of the lenses having optical power in the first lens group, the sum ∑CTF2 of the center thicknesses of the lenses having optical power in the second lens group, the effective focal length F1 of the first lens group, and the effective focal length F2 of the second lens group satisfy the following: 1.06≤|∑CTF1-∑CTF2| / (1 / F1+1 / |F2|)≤2.

16.

7. The camera lens assembly according to claim 1, wherein: The effective focal length F1 of the first lens group, the effective focal length F2 of the second lens group, and the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis satisfy the following: 1.4≤(F1+|F2|) / TTL≤2.

70.

8. The camera lens assembly according to any one of claims 1 to 7, wherein: The effective focal length fi of the camera lens group at the telephoto position, the center thickness CT5 of the fifth lens, and the center thickness CT6 of the sixth lens satisfy the following: 2.66≤fi / (CT5+CT6)≤5.

01.

9. The camera lens assembly according to any one of claims 1 to 7, wherein: The effective focal length f1 of the first lens and the center thickness CT1 of the first lens satisfy the following conditions: 1.60 mm 2 ≤f1*CT1≤2.88mm 2 .

10. The camera lens assembly according to any one of claims 1 to 7, characterized in that: The effective focal length f5 of the fifth lens and the center thickness CT5 of the fifth lens satisfy the following conditions: 1.35 mm 2 ≤f5*CT5≤3.22mm 2 .

11. The camera lens assembly according to any one of claims 1 to 7, characterized in that: When the camera lens group is in the telephoto position, the distance BFLi from the image side surface of the sixth lens to the imaging surface of the camera lens group on the optical axis and the effective focal length fi of the camera lens group in the telephoto position satisfy the following: 0.25≤BFLi / fi≤0.

43.

12. The camera lens assembly according to any one of claims 1 to 7, wherein: The effective focal length F1 of the first lens group and the difference ΔT between the air spacing between the first lens group and the second lens group on the optical axis when the camera lens group is at the telephoto position and the macro position satisfy the following: 2.56≤F1 / (|ΔT|*10)≤7.

93.

13. The camera lens assembly according to any one of claims 1 to 7, characterized in that: The difference ΔFOV between the maximum field angles of the camera lens assembly at the telephoto position and the macro position satisfies the following: 0<10*tan(|ΔFOV|)≤0.3.

Images