Zoom lens

Abstract

The application discloses a zoom lens, which comprises a first lens group with positive refractive power, a second lens group with negative refractive power, a third lens group with positive refractive power, a fourth lens group with positive refractive power and a fifth lens group with refractive power, wherein the first lens group, the third lens group and the fifth lens group are fixed groups; the first lens group comprises a first lens, a second lens and a third lens; the second lens group comprises a fourth lens, a fifth lens, a sixth lens and a seventh lens; the third lens group comprises an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens and a thirteenth lens; the fourth lens group comprises a fourteenth lens, a fifteenth lens and a sixteenth lens; and the fifth lens group comprises a seventeenth lens; the second lens group moves between the object side and the image side to realize continuous zooming between a wide-angle end and a long-focus end; and the fourth lens group moves between the object side and the image side to realize compensation of the change of the image surface position in the zooming process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical elements, in particular, to a zoom lens. BACKGROUND

[0002] In use, the focal length of the zoom lens can be continuously changed within a certain range, and it has the characteristics of being able to adapt to the use requirements of different scenes, and its market demand is increasing.

[0003] With the development of modern society and the progress of science and technology, the zoom optical system has been widely used in various aspects of life, such as security monitoring, intelligent transportation and other fields. The use of zoom lenses is increasing year by year, so the requirements for the optical performance and product stability of the zoom lens are also increasing.

[0004] However, the existing zoom lens still has the following problems: 1) the imaging target surface size of the existing zoom lens is small, and the resolution of the collected image is low; 2) the aperture of the existing zoom lens is small and changes during zooming, and the imaging picture is not transparent; 3) the number of lenses used in the existing zoom lens is large, and the lens size is large, so that the entire camera cannot be designed to be small; 4) the focal point of the existing zoom lens drifts in high and low temperature environment, and the imaging effect is easily affected by the environment; 5) the distortion of the existing zoom lens is large, which causes the peripheral people or scene image captured to be distorted, and the scene cannot be restored truly.

[0005] Therefore, it is one of the research focuses of those skilled in the art to design a zoom lens with at least one of the following characteristics: large target surface, high resolution, constant large aperture, small size, low distortion, and high and low temperature non-defocus. SUMMARY

[0006] The application provides a zoom lens which 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 negative refractive power, a third lens group with positive refractive power, a fourth lens group with positive refractive power, and a fifth lens group with refractive power. The first lens group, the third lens group and the fifth lens group are fixed groups, the second lens group is a zoom group, and the fourth lens group is a compensation group. The first lens group comprises, in order from the object side to the image side along the optical axis, a first lens, a second lens and a third lens; the second lens group comprises, in order from the object side to the image side along the optical axis, a fourth lens, a fifth lens, a sixth lens and a seventh lens; the third lens group comprises, in order from the object side to the image side along the optical axis, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens and a thirteenth lens; the fourth lens group comprises, in order from the object side to the image side along the optical axis, a fourteenth lens, a fifteenth lens and a sixteenth lens; and the fifth lens group comprises a seventeenth lens. The second lens group moves between the object side and the image side along the optical axis to achieve continuous zooming between a wide-angle end and a telephoto end; and the fourth lens group moves between the object side and the image side along the optical axis to compensate for changes in the image plane position during zooming.

[0007] In one embodiment, the first lens has positive refractive power; the second lens has negative refractive power; and the third lens has positive refractive power.

[0008] In one embodiment, the object side surface of the first lens is convex, and the image side surface of the first lens is convex; the object side surface of the second lens is concave, and the image side surface of the second lens is convex; and the object side surface of the third lens is convex, and the image side surface of the third lens is concave.

[0009] In one embodiment, the fourth lens has negative refractive power; the fifth lens has negative refractive power; the sixth lens has positive refractive power; and the seventh lens has negative refractive power.

[0010] In one embodiment, the image side surface of the fourth lens is concave; the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is concave; the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is convex; and the object side surface of the seventh lens is concave, and the image side surface of the seventh lens is concave.

[0011] In one embodiment, the eighth lens has positive refractive power; the ninth lens has positive refractive power; the tenth lens has negative refractive power; the eleventh lens has positive refractive power; the twelfth lens has positive refractive power; and the thirteenth lens has negative refractive power.

[0012] In one embodiment, the object side surface of the eighth lens is convex, and the image side surface of the eighth lens is concave; the object side surface of the ninth lens is convex, and the image side surface of the ninth lens is convex; the object side surface of the tenth lens is concave, and the image side surface of the tenth lens is concave; the object side surface of the eleventh lens is convex, and the image side surface of the eleventh lens is concave; the object side surface of the twelfth lens is convex, and the image side surface of the twelfth lens is convex; and the image side surface of the thirteenth lens is concave, and the image side surface of the thirteenth lens is concave.

[0013] In an embodiment, the fourteenth lens has positive refractive power; the fifteenth lens has positive refractive power; and the sixteenth lens has negative refractive power.

[0014] In an embodiment, the object side surface of the fourteenth lens is convex, the image side surface of the fourteenth lens is convex; the object side surface of the fifteenth lens is concave, the image side surface of the fifteenth lens is convex; and the object side surface of the sixteenth lens is concave, the image side surface of the sixteenth lens is concave.

[0015] In an embodiment, the seventeenth lens has positive refractive power or negative refractive power.

[0016] In an embodiment, the object side surface of the seventeenth lens is convex, the image side surface of the seventeenth lens is concave.

[0017] In an embodiment, the zoom lens satisfies: 3.7≤FG1 / Fw≤6.2, where FG1 is the effective focal length of the first lens group, and Fw is the total effective focal length of the zoom lens at the wide-angle end.

[0018] In an embodiment, the zoom lens satisfies: -1.8≤FG2 / Fw≤-1.4, where FG2 is the effective focal length of the second lens group, and Fw is the total effective focal length of the zoom lens at the wide-angle end.

[0019] In an embodiment, the zoom lens satisfies: 1.56≤FG3 / Fw≤2.3, where FG3 is the effective focal length of the third lens group, and Fw is the total effective focal length of the zoom lens at the wide-angle end.

[0020] In an embodiment, the zoom lens satisfies: 2.23≤FG4 / Fw≤3, where FG4 is the effective focal length of the fourth lens group, and Fw is the total effective focal length of the zoom lens at the wide-angle end.

[0021] In an embodiment, the zoom lens satisfies: 7.9≤|FG5 / Fw|≤32.5, where FG5 is the effective focal length of the fifth lens group, and Fw is the total effective focal length of the zoom lens at the wide-angle end.

[0022] In an embodiment, the zoom lens satisfies: 1.6≤D2 / IH≤1.7, where D2 is the on-axis distance between the position of the second lens group on the optical axis when the zoom lens is at the wide-angle end and the position of the second lens group on the optical axis when the zoom lens is at the telephoto end, and IH is the maximum image height of the zoom lens.

[0023] In one embodiment, the zoom lens satisfies: 4.16 ≤ TTL / D2 ≤ 4.37, where TTL is the on-axis distance from the object side surface of the first lens to the image plane of the zoom lens, and D2 is the on-axis distance between the position of the second lens group on the optical axis when the zoom lens is at the wide angle end and the position of the second lens group on the optical axis when the zoom lens is at the telephoto end.

[0024] In one embodiment, the zoom lens satisfies: 1.1 ≤ D2 / Fw ≤ 1.8, where D2 is the on-axis distance between the position of the second lens group on the optical axis when the zoom lens is at the wide angle end and the position of the second lens group on the optical axis when the zoom lens is at the telephoto end, and Fw is the total effective focal length of the zoom lens when it is at the wide angle end.

[0025] In one embodiment, the Abbe number Vd of at least one lens in the third lens group satisfies: 50 ≤ Vd ≤ 75. G3 G3 In one embodiment, the Abbe number Vd of at least one lens in the third lens group satisfies: 50 ≤ Vd ≤ 75.

[0026] In one embodiment, the zoom lens satisfies: 0.18 ≤ TG4 / FG4 ≤ 0.31, where TG4 is the thickness of the fourth lens group on the optical axis, and FG4 is the effective focal length of the fourth lens group.

[0027] In one embodiment, the zoom lens satisfies: 0.34 ≤ Ft / FG1 ≤ 0.6, where Ft is the total effective focal length of the zoom lens when it is at the telephoto end, and FG1 is the effective focal length of the first lens group.

[0028] In one embodiment, the zoom lens satisfies: 1.46 ≤ f8 / FG3 ≤ 2.5, where f8 is the effective focal length of the eighth lens, and FG3 is the effective focal length of the third lens group.

[0029] In one embodiment, the zoom lens satisfies: 6.98 ≤ TTL / IH ≤ 7.4, where TTL is the on-axis distance from the object side surface of the first lens to the image plane of the zoom lens, and IH is the maximum image height of the zoom lens.

[0030] In one embodiment, the zoom lens satisfies: 36.4 ≤ TTL / (Ft / Fw) ≤ 41.4, where TTL is the on-axis distance from the object side surface of the first lens to the image plane of the zoom lens, Ft is the total effective focal length of the zoom lens when it is at the telephoto end, and Fw is the total effective focal length of the zoom lens when it is at the wide angle end.

[0031] In one embodiment, the zoom lens satisfies: 2.58 ≤ (f12-f13) / FG3 ≤ 3.24, where f12 is the effective focal length of the twelfth lens, f13 is the effective focal length of the thirteenth lens, and FG3 is the effective focal length of the third lens group.

[0032] ​In one embodiment, the zoom lens satisfies: 1.41≤f1 / FG1≤1.6, where f1 is the effective focal length of the first lens, and FG1 is the effective focal length of the first lens group.

[0033] In one embodiment, the zoom lens satisfies: 2.0≤Ft / Fw≤2.5, where Ft is the total effective focal length of the zoom lens at the tele end, and Fw is the total effective focal length of the zoom lens at the wide end.

[0034] In one embodiment, the zoom lens satisfies at least one of the following: 3.95≤FG1 / Fw≤6.2, -1.80≤FG2 / Fw≤-1.45, 1.6≤FG3 / Fw≤2.3, 2.4≤FG4 / Fw≤2.9, 7.9≤|FG5 / Fw|≤32.1, 1.65≤D2 / IH≤1.7, 4.2≤TTL / D2≤4.37, 1.2≤D2 / Fw≤1.7, 1.6≤f8 / FG3≤2.42, 7≤TTL / IH≤7.4, 36.9≤TTL / (Ft / Fw)≤40.75, 2.6≤(f12-f13) / FG3≤2.95, 2.2≤Ft / Fw≤2.5, where FG1 is the effective focal length of the first lens group, FG2 is the effective focal length of the second lens group, FG3 is the effective focal length of the third lens group, FG4 is the effective focal length of the fourth lens group, FG5 is the effective focal length of the fifth lens group, Fw is the total effective focal length of the zoom lens at the wide end, D2 is the on-axis distance between the position of the second lens group on the optical axis at the wide end of the zoom lens and the position of the second lens group on the optical axis at the tele end of the zoom lens, IH is the maximum image height of the zoom lens, TTL is the on-axis distance from the object side of the first lens to the image plane of the zoom lens, Ft is the total effective focal length of the zoom lens at the tele end, f8 is the effective focal length of the eighth lens, f12 is the effective focal length of the twelfth lens, and f13 is the effective focal length of the thirteenth lens.

[0035] The zoom lens according to the present application adopts a fixed+zoom+fixed+compensation+fixed five-group architecture, and by reasonably setting the power and action mode of the first to fifth lens groups, the zoom lens provided by the present application has at least one of the beneficial effects of continuous zooming, wide focusing distance range, constant aperture, small volume, large target surface, low distortion, high resolution, infrared confocal, and no defocus at high and low temperatures of -40°C to 80°C. BRIEF DESCRIPTION OF DRAWINGS

[0036] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the following drawings:

[0037] Figure 1A and Figure 1Bare structural schematic diagrams of the zoom lens according to Embodiment 1 of the present application at the wide-angle end and the telephoto end, respectively;

[0038] Figure 1C and Figure 1D are distortion diagrams of the zoom lens according to Embodiment 1 of the present application at the wide-angle end and the telephoto end, respectively;

[0039] Figure 2A and Figure 2B are structural schematic diagrams of the zoom lens according to Embodiment 2 of the present application at the wide-angle end and the telephoto end, respectively;

[0040] Figure 2C and Figure 2D are distortion diagrams of the zoom lens according to Embodiment 2 of the present application at the wide-angle end and the telephoto end, respectively;

[0041] Figure 3A and Figure 3B are structural schematic diagrams of the zoom lens according to Embodiment 3 of the present application at the wide-angle end and the telephoto end, respectively;

[0042] Figure 3C and Figure 3D are distortion diagrams of the zoom lens according to Embodiment 3 of the present application at the wide-angle end and the telephoto end, respectively;

[0043] Figure 4A and Figure 4B are structural schematic diagrams of the zoom lens according to Embodiment 4 of the present application at the wide-angle end and the telephoto end, respectively;

[0044] Figure 4C and Figure 4D are distortion diagrams of the zoom lens according to Embodiment 4 of the present application at the wide-angle end and the telephoto end, respectively;

[0045] Figure 5A and Figure 5B are structural schematic diagrams of the zoom lens according to Embodiment 5 of the present application at the wide-angle end and the telephoto end, respectively;

[0046] Figure 5C and Figure 5D are distortion diagrams of the zoom lens according to Embodiment 5 of the present application at the wide-angle end and the telephoto end, respectively. DETAILED DESCRIPTION

[0047] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely descriptive of exemplary embodiments of the present application and is not intended to limit the scope of the present application in any way. Throughout the specification, like reference numerals refer to like elements. The expression “and / or” includes any and all combinations of one or more of the associated listed items.

[0048] It should be noted that the terms first, second, third, etc. are used herein only to distinguish one feature from another, and do not denote any limitation on the features. Thus, a first lens discussed below can also be referred to as a second lens or a third lens, without departing from the teachings of the present application.

[0049] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for the sake of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0050] In this context, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be made in accordance with a general method in the art, for example, judging convexity or concavity by the sign of the R value (R refers to the radius of curvature in the paraxial region). In this context, the surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the imaging side is referred to as the image side surface of the lens. In terms of the object side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. In terms of the image side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0051] It should also be understood that the words “comprise”, “comprising”, “include”, “including”, and / or “contain”, when used in this specification, specify the presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. Furthermore, as used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. In addition, as used herein, the expression “at least one of’ followed by a list of two or more items will cover

[0052] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0053] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in the case of no conflict. The features, principles and other aspects of the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] The features, principles and other aspects of the present application are described in detail below.

[0055] The zoom lens according to the exemplary embodiments of the present application can include five lens groups with optical power, i.e., a first lens group with positive optical power, a second lens group with negative optical power, a third lens group with positive optical power, a fourth lens group with positive optical power, and a fifth lens group with positive optical power or negative optical power. The five lens groups are arranged in order along the optical axis from the object side to the image side. Among them, the first lens group, the third lens group and the fifth lens group are fixed groups, and the first lens group, the third lens group and the fifth lens group can be fixed relative to the position of the imaging surface of the zoom lens. The second lens group is a zoom group, which can move along the optical axis between the object side and the image side to enable the zoom lens to realize continuous zooming between the wide-angle end and the telephoto end. The fourth lens group is a compensation group, which moves along the optical axis corresponding to the movement of the second lens group to realize the compensation effect of the change of the image surface position during zooming.

[0056] In the exemplary embodiments, the first lens group has positive optical power, and the main role of the first lens is to correct the field curvature under different object distances, while reducing the tolerance sensitivity and ensuring the uniformity of the picture.

[0057] In the exemplary embodiments, the second lens group has negative optical power and can move along the optical axis between the object side and the image side. By changing the position of the second lens group on the optical axis, the zoom lens can be switched from the wide-angle end to the telephoto end or from the telephoto end to the wide-angle end to enable the zoom lens to realize continuous zooming.

[0058] In the exemplary embodiments, the third lens group has positive optical power, which can effectively control the trend of light rays, make the light rays transition smoothly, reduce the generation of aberration, and help to ensure the resolution quality of the lens; at the same time, it can also help the lens to realize non-thermalization, so that the optical lens has good temperature performance and is beneficial to the lens not to be out of focus in high and low temperature environments.

[0059] In the exemplary embodiments, the fourth lens group has positive optical power and mainly undertakes the compensation effect of the change of the image surface position during zooming. The fourth lens group can move along the optical axis corresponding to the movement of the second lens group to compensate the image surface during the continuous zooming of the lens, thereby ensuring the imaging quality of the main body of the lens during continuous zooming.

[0060] In the exemplary embodiments, the fifth lens group has positive optical power or negative optical power, which is beneficial to reduce the change of the field curvature during the entire zooming process and improve the optical imaging quality.

[0061] In the example embodiment, the first lens group can sequentially include, along the optical axis from the object side to the image side, a first lens, a second lens, and a third lens. The first lens group can include two lenses with positive refractive power and one lens with negative refractive power. For example, the first lens can have positive refractive power, with the object side surface being convex and the image side surface being convex; the second lens can have negative refractive power, with the object side surface being concave and the image side surface being convex; and the third lens can have positive refractive power, with the object side surface being convex and the image side surface being concave. The first lens is a positive convex-convex lens, the second lens is a negative convex-concave lens, and the third lens is a positive convex-concave lens. Two meniscus lenses are arranged in the first lens group, which is conducive to the correction of field curvature at different object distances. The object side surface of the first lens is convex, and the image side surface is concave, which is conducive to reducing the distortion of the optical system, so that the absolute value of the optical distortion DIS satisfies |DIS|≤|±5.5%| at the wide-angle end, and the optical distortion DIS≤8.2% at the telephoto end.

[0062] In the example embodiment, the first lens and the second lens can cooperate with each other to form a double cemented lens, which is conducive to the correction of chromatic aberration at the telephoto end of the lens.

[0063] In the example embodiment, the second lens group can sequentially include, along the optical axis from the object side to the image side, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The second lens group can be provided with at least two lenses with negative refractive power. For example, the fourth lens can have negative refractive power, with the object side surface being concave or convex and the image side surface being concave; the fifth lens can have negative refractive power, with the object side surface being concave and the image side surface being concave; the sixth lens can have positive refractive power, with the object side surface being convex and the image side surface being convex; and the seventh lens can have negative refractive power, with the object side surface being concave and the image side surface being concave. The second lens group is provided with at least two negative lenses, which is conducive to increasing the light divergence speed and improving the zoom efficiency. In particular, the refractive power of the fourth lens and the seventh lens is reasonably configured. When the fourth lens and the seventh lens have negative refractive power, the light divergence speed can be increased, and the zoom efficiency of the lens can be improved.

[0064] In the example embodiment, the second lens group can include a cemented lens, which is conducive to balancing the lateral chromatic aberration of the second lens group and improving the resolution of the overall optical system. For example, the fifth lens and the sixth lens can cooperate with each other to form a double cemented lens. For example, the fifth lens, the sixth lens, and the seventh lens can cooperate with each other to form a triple cemented lens.

[0065] In the example embodiment, the third lens group can sequentially include, along the optical axis from the object side to the image side, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, and a thirteenth lens. Illustratively, the eighth lens has positive refractive power, the object side surface of which is convex, and the image side surface of which is concave; the ninth lens has positive refractive power, the object side surface of which is convex, and the image side surface of which is convex; the tenth lens has negative refractive power, the object side surface of which is concave, and the image side surface of which is concave; the eleventh lens has positive refractive power, the object side surface of which is convex, and the image side surface of which is concave; the twelfth lens has positive refractive power, the object side surface of which is convex, and the image side surface of which is convex; and the thirteenth lens has negative refractive power, the object side surface of which is concave, and the image side surface of which is concave. The eighth lens is configured as a meniscus lens with positive refractive power, which is conducive to correcting field curvature.

[0066] In the example embodiment, the third lens group can include one cemented lens. Illustratively, the ninth lens, the tenth lens, and the eleventh lens can be cemented into one three-cemented lens. The refractive powers of the ninth lens, the tenth lens, and the eleventh lens are reasonably configured to be positive-negative-positive, which is conducive to mutual compensation of positive and negative spherical aberrations, improving the resolution of the lens; at the same time, the trend of light rays is effectively controlled, the light rays are smoothly transmitted, the tolerance sensitivity of the third lens group is effectively reduced, the angle of the outgoing light rays on the image side surface of the eleventh lens is reduced, the height of the light rays is effectively reduced, and the generation of aberrations is reduced.

[0067] In the example embodiment, the twelfth lens with positive refractive power and the thirteenth lens with negative refractive power cooperate with each other to effectively control the trend of light rays, smoothly transmit the light rays, effectively reduce the tolerance sensitivity of the third lens group, and improve the production yield of the lens; at the same time, the thirteenth lens has negative refractive power, which is conducive to the divergence of light rays after passing through the thirteenth lens, so that the light rays are better transmitted to the fourth lens group, which is conducive to correcting aberrations and improving the imaging performance of the lens.

[0068] In the example embodiment, the fourth lens group can sequentially include, along the optical axis from the object side to the image side, a fourteenth lens, a fifteenth lens, and a sixteenth lens. The fourth lens group can include two lenses with positive refractive power and one lens with negative refractive power. The two lenses with positive refractive power are configured to balance the astigmatism and chromatic aberration introduced by the front lens group, and the one lens with negative refractive power is configured to balance various aberrations of the optical system. Illustratively, the fourteenth lens has positive refractive power, the object side surface of which is convex, and the image side surface of which is convex; the fifteenth lens has positive refractive power, the object side surface of which is concave, and the image side surface of which is convex; and the sixteenth lens has negative refractive power, the object side surface of which is concave, and the image side surface of which is concave.

[0069] In the exemplary embodiments, the fifth lens set can include a seventeenth lens having positive refractive power or negative refractive power. The seventeenth lens can be configured as a convex-concave plastic lens, which is beneficial to realize the design of the lens without thermalization and effectively control the trend of the light rays exiting the seventeenth lens, so as to better match the requirements of the large target chip; meanwhile, it is beneficial to balance various aberrations of the optical system and improve the performance of the lens.

[0070] In the exemplary embodiments, the zoom lens according to the present application further includes a diaphragm arranged between the second lens set and the third lens set. For example, the diaphragm can be arranged between the seventh lens and the eighth lens. However, it should be noted that the position of the diaphragm disclosed herein is only an example and is not a limitation; in alternative embodiments, the diaphragm can also be arranged at other positions according to actual needs.

[0071] In the exemplary embodiments of the present application, the zoom lens according to the present application can satisfy 3.7≤FG1 / Fw≤6.2, where FG1 is the effective focal length of the first lens set, and Fw is the total effective focal length of the zoom lens at the wide-angle end. More specifically, FG1 and Fw can further satisfy 3.95≤FG1 / Fw≤6.2. Satisfying 3.7≤FG1 / Fw≤6.2, reasonably controlling the focal length of the first lens set and the total effective focal length of the zoom lens at the wide-angle end, is beneficial to make the large-angle incident light rays converge into the optical system, effectively expanding the field of view angle of the optical system.

[0072] In the exemplary embodiments of the present application, the zoom lens according to the present application can satisfy -1.8≤FG2 / Fw≤-1.4, where FG2 is the effective focal length of the second lens set, and Fw is the total effective focal length of the zoom lens at the wide-angle end. More specifically, FG2 and Fw can further satisfy -1.8≤FG2 / Fw≤-1.45. Satisfying -1.8≤FG2 / Fw≤-1.4, by reasonably controlling the focal length value of the second lens set, is beneficial to realize the imaging performance while ensuring the required zoom ratio during the zooming process.

[0073] In the exemplary embodiments of the present application, the zoom lens according to the present application can satisfy 1.56≤FG3 / Fw≤2.3, where FG3 is the effective focal length of the third lens set, and Fw is the total effective focal length of the zoom lens at the wide-angle end. More specifically, FG3 and Fw can further satisfy 1.6≤FG3 / Fw≤2.3. Satisfying 1.56≤FG3 / Fw≤2.3, reasonably distributing the focal length value of the third lens set, is beneficial to the third lens set to collect the exiting light rays of the second lens set, make the light rays transition smoothly, effectively reduce the generation of aberrations, and improve the optical imaging quality.

[0074] In the exemplary embodiments of the present application, the zoom lens according to the present application can satisfy 2.23≤FG4 / Fw≤3, where FG4 is the effective focal length of the fourth lens group, and Fw is the total effective focal length of the zoom lens at the wide-angle end. More specifically, FG4 and Fw can further satisfy 2.4≤FG4 / Fw≤2.9. Satisfying 2.23≤FG4 / Fw≤3, by reasonably controlling the focal length value of the fourth lens group, the image surface is ensured to be stable during zooming, and the generation of spherical aberration during the entire zooming process can be reduced to obtain high imaging performance; meanwhile, the optical distortion can also be effectively reduced, so that the absolute value of the optical distortion DIS of the optical lens at the wide-angle end satisfies |DIS|≤|±5.5%|, and the optical distortion DIS at the telephoto end satisfies DIS≤8.2%, thereby achieving a low-distortion effect.

[0075] In the exemplary embodiments of the present application, the zoom lens according to the present application can satisfy 7.9≤|FG5 / Fw|≤32.5, where FG5 is the effective focal length of the fifth lens group, and Fw is the total effective focal length of the zoom lens at the wide-angle end. More specifically, FG5 and Fw can further satisfy 7.9≤|FG5 / Fw|≤32.1. Satisfying 7.9≤|FG5 / Fw|≤32.5, by reasonably controlling the focal length value of the fifth lens group, the change of field curvature during the entire zooming process can be reduced, and the optical imaging quality can be improved.

[0076] In the exemplary embodiments of the present application, the zoom lens according to the present application can satisfy 1.6≤D2 / IH≤1.7, where D2 is the axial distance between the position of the second lens group on the optical axis at the wide-angle end of the zoom lens and the position of the second lens group on the optical axis at the telephoto end of the zoom lens, and IH is the maximum image height of the zoom lens. More specifically, D2 and IH can further satisfy 1.65≤D2 / IH≤1.7. Satisfying 1.6≤D2 / IH≤1.7, by controlling the moving distance of the second lens group under the same image height, the length of the optical lens can be effectively limited, thereby being conducive to realizing the miniaturization of the optical lens, and the total optical length TTL of the zoom lens is less than 95 mm.

[0077] In the exemplary embodiments of the present application, the zoom lens according to the present application can satisfy 4.16≤TTL / D2≤4.37, where D2 is the axial distance between the position of the second lens group on the optical axis at the wide-angle end of the zoom lens and the position of the second lens group on the optical axis at the telephoto end of the zoom lens, and TTL is the axial distance from the object side of the first lens to the image plane of the zoom lens. More specifically, TTL and D2 can further satisfy 4.2≤TTL / D2≤4.37. Satisfying 4.16≤TTL / D2≤4.37, by controlling the ratio of the total optical length of the lens to the moving distance of the second lens group within a specific range, the small volume is realized while the tolerance sensitivity is ensured, and the zoom response speed of the lens is improved.

[0078] In the exemplary embodiments of the present application, the zoom lens according to the present application can satisfy 1.1≤D2 / Fw≤1.8, where D2 is the on-axis distance between the position of the second lens group on the optical axis when the zoom lens is at the wide-angle end and the position of the second lens group on the optical axis when the zoom lens is at the telephoto end, and Fw is the total effective focal length of the zoom lens when the zoom lens is at the wide-angle end. More specifically, D2 and Fw can further satisfy 1.2≤D2 / Fw≤1.7. Satisfying 1.1≤D2 / Fw≤1.8 is advantageous for reducing the aberration generated between the first lens group and the second lens group, while also controlling the volume of the lens and reducing the design cost.

[0079] In the exemplary embodiments of the present application, the Abbe number Vd of at least one lens in the third lens group satisfies 50≤Vd≤75. G3 Satisfying 50≤Vd≤75 is advantageous for effectively correcting the chromatic aberration of the third lens group, thereby improving the imaging quality of the optical system. G3 Satisfying 50≤Vd≤75 is advantageous for effectively correcting the chromatic aberration of the third lens group, thereby improving the imaging quality of the optical system.

[0080] In the exemplary embodiments of the present application, the zoom lens according to the present application satisfies 0.18≤TG4 / FG4≤0.31, where TG4 is the thickness of the fourth lens group on the optical axis (i.e., the on-axis distance from the object side surface of the fourteenth lens to the image side surface of the sixteenth lens), and FG4 is the effective focal length of the fourth lens group. Satisfying 0.18≤TG4 / FG4≤0.31 is advantageous for achieving the miniaturization of the lens by reasonably setting the ratio of the thickness of the fourth lens group to the focal length of the fourth lens group, so that the volume of the fourth lens group is small, and the total optical length TTL<95mm.

[0081] In the exemplary embodiments of the present application, the zoom lens according to the present application satisfies 0.34≤Ft / FG1≤0.6, where Ft is the total effective focal length of the zoom lens when the zoom lens is at the telephoto end, and FG1 is the effective focal length of the first lens group. Satisfying 0.34≤Ft / FG1≤0.6 is advantageous for balancing various types of aberrations of the zoom lens at the telephoto end, thereby improving the resolution.

[0082] In the exemplary embodiments of the present application, the zoom lens according to the present application satisfies 1.46≤f8 / FG3≤2.5, where f8 is the effective focal length of the eighth lens, and FG3 is the effective focal length of the third lens group. More specifically, f8 and FG3 can further satisfy 1.6≤f8 / FG3≤2.42. Satisfying 1.46≤f8 / FG3≤2.5 is advantageous for reasonably controlling the ratio of the focal length of the eighth lens to the focal length of the third lens group, so that the eighth lens has a light collecting effect, thereby ensuring the light flux and improving the illumination of the optical system.

[0083] In the exemplary embodiments of the present application, the zoom lens according to the present application satisfies: 6.98≤TTL / IH≤7.4, where TTL is the on-axis distance from the object side surface of the first lens to the image plane of the zoom lens, and IH is the maximum image height of the zoom lens. More specifically, TTL and IH further satisfy 7≤TTL / IH≤7.4. Satisfying 6.98≤TTL / IH≤7.4, the ratio of the image plane size of the lens to the total optical length of the lens is reasonably controlled within a certain range, which is beneficial to realizing a small volume while ensuring the image quality of the full image height.

[0084] In the exemplary embodiments of the present application, the zoom lens according to the present application satisfies: 36.4≤TTL / (Ft / Fw)≤41.4, where Ft is the total effective focal length of the zoom lens at the tele end, Fw is the total effective focal length of the zoom lens at the wide end, and TTL is the on-axis distance from the object side surface of the first lens to the image plane of the zoom lens. More specifically, TTL, Ft and Fw further satisfy 36.9≤TTL / (Ft / Fw)≤40.75. Satisfying 36.4≤TTL / (Ft / Fw)≤41.4, the ratio of the total optical length TTL of the lens to the zoom ratio Ft / Fw of the lens is reasonably controlled within a certain range, which is beneficial to realizing a small volume of the lens while ensuring the image quality and tolerance sensitivity on the premise of meeting the required zoom ratio of the lens.

[0085] In the exemplary embodiments of the present application, the zoom lens according to the present application satisfies: 2.58≤(f12-f13) / FG3≤3.24, where f12 is the effective focal length of the twelfth lens, f13 is the effective focal length of the thirteenth lens, and FG3 is the effective focal length of the third lens group. More specifically, f12, f13 and FG3 further satisfy 2.6≤(f12-f13) / FG3≤2.95. Satisfying 2.58≤(f12-f13) / FG3≤3.24, the ratio of the difference between the effective focal lengths of the twelfth lens and the thirteenth lens to the effective focal length of the third lens group is reasonably controlled within a certain range, which is beneficial to ensuring the athermalization of the zoom lens.

[0086] In the exemplary embodiments of the present application, the zoom lens according to the present application satisfies: 1.41≤f1 / FG1≤1.6, where f1 is the effective focal length of the first lens, and FG1 is the effective focal length of the first lens group. Satisfying 1.41≤f1 / FG1≤1.6, the ratio of the effective focal length of the first lens to the effective focal length of the first lens group is reasonably controlled within a certain range, which is beneficial to reasonably distributing the refractive power of the first lens and reducing the front aperture of the zoom lens.

[0087] In the exemplary embodiments of the present application, the zoom lens according to the present application satisfies: 2.0≤Ft / Fw≤2.5, where Ft is the total effective focal length when the zoom lens is at the telephoto end, and Fw is the total effective focal length when the zoom lens is at the wide-angle end. More specifically, Ft and Fw can further satisfy 2.2≤Ft / Fw≤2.5. Satisfying 2.0≤Ft / Fw≤2.5, the ratio of the total effective focal length when the zoom lens is at the telephoto end and the total effective focal length when the zoom lens is at the wide-angle end is reasonably controlled, i.e., the zoom ratio of the lens is controlled, so that the lens satisfies the zoom magnification requirement and improves the zoom efficiency.

[0088] In the exemplary embodiments, the distance on the optical axis from the object side surface of the first lens to the imaging surface of the zoom lens according to the present application can satisfy: TTL<95mm.

[0089] In the exemplary embodiments, the aperture number Fno of the zoom lens according to the present application is constant, for example, Fno is 1.6. The aperture of the zoom lens according to the present application is constant during zooming, the resolution does not decrease, the imaging picture is transparent, and the background is naturally blurred.

[0090] In the exemplary embodiments, the absolute value of the optical distortion DIS of the optical lens according to the present application satisfies |DIS|≤|±5.5%| at the wide-angle end, and DIS≤8.2% at the telephoto end, and the optical lens has the characteristics of low distortion.

[0091] In the exemplary embodiments, the total effective focal length Fw of the zoom lens according to the present application at the wide-angle end satisfies: 12.95mm≤Fw≤17mm, and the total effective focal length Ft of the zoom lens at the telephoto end satisfies: 30mm≤Ft≤38mm.

[0092] In the exemplary embodiments, the present application adopts the combination of spherical lenses and aspherical lenses, which is beneficial to reduce the processing difficulty of the lenses. At the same time, through material matching, the athermalization design can be realized. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When the imaging quality is emphasized, the number of aspherical lenses can be increased, and even all the lenses use aspherical lenses. The aspherical lens has the characteristic that the curvature is continuously changed from the center of the lens to the periphery. Unlike the spherical lens which has constant curvature from the center of the lens to the periphery, the aspherical lens has better curvature radius characteristics, and has the advantages of improving the distortion aberration and improving the astigmatism aberration. After using the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality of the lens. Optionally, the object side surface and the image side surface of the twelfth lens, the thirteenth lens, the fifteenth lens, the sixteenth lens, and the seventeenth lens are aspherical mirror surfaces.

[0093] The zoom lens of the present application can adopt a lens structure of glass-plastic hybrid, which can reduce the design cost while ensuring the required zoom ratio of the lens, and has excellent resolving power.

[0094] The zoom lens according to the present application adopts a five-group architecture of fixed+zoom+fixed+compensation+fixed, and more specifically, the five-group architecture includes a first lens group with positive refractive power, a second lens group with negative refractive power, a third lens group with positive refractive power, a fourth lens group with positive refractive power, and a fifth lens group with positive or negative refractive power, and further includes a diaphragm arranged between the second lens group and the third lens group, which can well correct field curvature and distortion, and at the same time meet the use requirement of a large target surface (the maximum imaging target surface can reach 12.8 mm). Reasonable matching of the refractive power of each group can correct high-order aberrations to a great extent when light passes through the lens smoothly, improve the imaging quality, and at the same time, the common movement of the zoom group and the compensation group can realize continuous zooming of the zoom lens between the wide-angle end and the long-focus end, compensate for the aberrations caused during zooming, effectively realize the aberration balance of each focal length of the zoom lens, and ensure the clarity of the image under different focal lengths.

[0095] The zoom lens of the present application has excellent resolving power, and the resolution can reach more than 8K.

[0096] The zoom lens of the present application has a small volume, and realizes performance maximization in the smallest possible volume.

[0097] The zoom lens of the present application solves the problem of focal point drift under high and low temperature environments on the premise of considering infrared performance, so that the zoom lens of the present application does not defocus in the temperature range of -40℃ to 80℃, is suitable for various high and low temperature environments, and greatly widens the application range of the zoom lens of the present application.

[0098] The zoom lens of the present application has the feature of visible light and infrared co-focusing, realizes the correction of chromatic aberration and secondary spectrum in the waveband of 420nm to 940nm, and can ensure the resolving power when switching between day and night without refocusing.

[0099] The zoom lens of the present application has a wide focusing object distance range, and can ensure clear focusing from 0.1m to infinity in the whole zooming process.

[0100] The present application can be used to set the refractive power of each lens group and the refractive power and surface shape of each lens, which is conducive to the ability of correcting optical aberration and chromatic aberration when switching between the wide-angle end and the long-focus end of the zoom lens, and at the same time, is conducive to reducing the tolerance sensitivity of the system, improving the uniformity of the picture, and the like.

[0101] Optionally, in other alternative example embodiments, the above-mentioned zoom lens can further increase a filter for correcting color deviation and / or a protective glass for protecting the photosensitive elements on the imaging surface.

[0102] However, those skilled in the art will understand that the number of lenses constituting the zoom lens can be changed without departing from the technical solutions claimed in the present application, to obtain the various results and advantages described in the present specification. For example, although described in the embodiments by way of example with seventeen lenses, the zoom lens is not limited to including seventeen lenses. If necessary, the zoom lens can also include other numbers of lenses.

[0103] The specific embodiments of the zoom lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0104] Example 1

[0105] The following refers to Figures 1A to 1D A zoom lens 100 according to Embodiment 1 of the present application is described. Figure 1A is a structural schematic diagram of the zoom lens 100 according to Embodiment 1 of the present application at the wide-angle end, Figure 1B is a structural schematic diagram of the zoom lens 100 according to Embodiment 1 of the present application at the telephoto end.

[0106] As shown in Figs. 1 and 2, the zoom lens 100 includes, in order from the object side to the image side: a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, a fourth lens group G4 having positive refractive power, a fifth lens group G5 having negative refractive power, and an imaging surface IMA. Figure 1A Figure 1B The first lens group G1 includes a first lens L1, a second lens L2, and a third lens L3. The first lens L1 has positive refractive power, and its object side surface S1 is a convex surface and its image side surface S2 is a convex surface. The second lens L2 has negative refractive power, and its object side surface S2 is a concave surface and its image side surface S3 is a convex surface. The third lens L3 has positive refractive power, and its object side surface S4 is a convex surface and its image side surface S5 is a concave surface. The first lens L1 and the second lens L2 are cemented and form a double cemented lens.

[0107] The second lens group G2 includes a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fourth lens L4 can have negative refractive power, and its object side surface S6 is a convex surface and its image side surface S7 is a concave surface. The fifth lens L5 can have negative refractive power, and its object side surface S8 is a concave surface and its image side surface S9 is a concave surface. The sixth lens L6 can have positive refractive power, and its object side surface S9 is a convex surface and its image side surface S10 is a convex surface. The seventh lens L7 can have negative refractive power, and its object side surface S11 is a concave surface and its image side surface S12 is a concave surface. The fifth lens L5 and the sixth lens L6 are cemented and form a double cemented lens.

[0108] The second lens group G2 includes a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fourth lens L4 can have negative refractive power, and its object side surface S6 is a convex surface and its image side surface S7 is a concave surface. The fifth lens L5 can have negative refractive power, and its object side surface S8 is a concave surface and its image side surface S9 is a concave surface. The sixth lens L6 can have positive refractive power, and its object side surface S9 is a convex surface and its image side surface S10 is a convex surface. The seventh lens L7 can have negative refractive power, and its object side surface S11 is a concave surface and its image side surface S12 is a concave surface. The fifth lens L5 and the sixth lens L6 are cemented and form a double cemented lens.

[0109] ​The third lens group G3 includes an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens Ll l, a twelfth lens L12 and a thirteenth lens L13. The eighth lens L8 can have positive refractive power, its object side surface S14 is a convex surface, and its image side surface S15 is a concave surface. The ninth lens L9 can have positive refractive power, its object side surface S16 is a convex surface, and its image side surface S17 is a convex surface. The tenth lens L10 can have negative refractive power, its object side surface S17 is a concave surface, and its image side surface S18 is a concave surface. The eleventh lens Ll l can have positive refractive power, its object side surface S18 is a convex surface, and its image side surface S19 is a concave surface. The twelfth lens L12 can have positive refractive power, its object side surface S20 is a convex surface, and its image side surface S21 is a convex surface. The thirteenth lens L13 can have negative refractive power, its object side surface S22 is a concave surface, and its image side surface S23 is a concave surface. The ninth lens L9, the tenth lens L10 and the eleventh lens Ll l are cemented together to form a three-cemented lens.

[0110] The fourth lens group G4 includes a fourteenth lens L14, a fifteenth lens L15 and a sixteenth lens L16. The fourteenth lens L14 can have positive refractive power, its object side surface S24 is a convex surface, and its image side surface S25 is a convex surface. The fifteenth lens L15 can have positive refractive power, its object side surface S26 is a concave surface, and its image side surface S27 is a convex surface. The sixteenth lens L16 has negative refractive power, its object side surface S28 is a concave surface, and its image side surface S29 is a concave surface.

[0111] The fifth lens group G5 includes a seventeenth lens L17. The seventeenth lens L17 has negative refractive power, its object side surface S30 is a convex surface, and its image side surface S31 is a concave surface.

[0112] The zoom lens 100 can further include a stop STO disposed between the second lens group G2 and the third lens group G3, more specifically, the stop STO can be disposed between the seventh lens L7 and the eighth lens L8. Optionally, the zoom lens 100 can further include a filter (not shown) having a first side surface and a second side surface and / or a cover glass CG having a first side surface S32 and a second side surface S33. Light from an object passes through the surfaces S1 to S33 in sequence and is finally imaged on an image plane IMA, where an image sensor chip can be disposed.

[0113] Table 1 shows a basic parameter table of the zoom lens 100 of Embodiment 1, where the units of the radius of curvature and the thickness / distance are millimeters (mm).

[0114] Table 1

[0115]

[0116] In the embodiment 1 and the following embodiments, by changing the position of the second lens group G2 on the optical axis, the zoom lens can be switched from the wide-angle end to the telephoto end or from the telephoto end to the wide-angle end, so that the total effective focal length of the zoom lens is continuously variable, and meanwhile, by adjusting the position of the fourth lens group G4 on the optical axis, the image surface of the zoom lens can be sharply focused during zooming.

[0117] Table 2 shows the values of T0, T1, T2 and T3 in Table 1 when the zoom lens 100 is at the wide-angle end and the telephoto end, respectively. Table 2 also shows the values of the total effective focal length F, the aperture number Fno and the optical distortion DIS of the zoom lens 100 in the embodiment 1 when the zoom lens 100 is at the wide-angle end and the telephoto end, respectively, wherein F and DIS change as the zoom lens 100 is switched from the wide-angle end to the telephoto end or from the telephoto end to the wide-angle end, and Fno remains unchanged. The units of T0, T1, T2, T3 and F in Table 2 are millimeters (mm).

[0118] Table 2

[0119]

[0120] In the embodiment 1, the object side and the image side of the twelfth lens L12, the thirteenth lens L13, the fifteenth lens L15, the sixteenth lens L16 and the seventeenth lens L17 are aspherical surfaces, and the surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0121] (1)

[0122] wherein, x is the sag of the aspherical surface at the position with the height of h from the vertex of the aspherical surface; 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 correction coefficient of the aspherical surface at the i -th order. Table 3 below shows the conic coefficient k and the higher order coefficient A 4 , A 6 , A 8 , A 10 , A 12 , A 14 and A16 .

[0123] Table 3

[0124]

[0125] Figure 1C and Figure 1D are distortion maps of the zoom lens 100 according to Embodiment 1 at the wide-angle end and the telephoto end, respectively. According to the zoom lens 100, the distortion is less than 0.1% at the wide-angle end and the telephoto end. Figure 1C and Figure 1D It can be seen that the zoom lens 100 according to Embodiment 1 can achieve good imaging quality at different focal lengths.

[0126] Example 2

[0127] The zoom lens 200 according to Embodiment 2 is described below with reference to Figures 2A to 2D . Figure 2A is a structural schematic view of the zoom lens 200 according to Embodiment 2 at the wide-angle end, Figure 2B is a structural schematic view of the zoom lens 200 according to Embodiment 2 at the telephoto end.

[0128] In this embodiment and the following embodiments, some descriptions similar to Embodiment 1 will be omitted for brevity.

[0129] As shown in Figure 2A and Figure 2B , the zoom lens 200 sequentially comprises, from the object side to the image side: a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, a fourth lens group G4 having positive refractive power, a fifth lens group G5 having negative refractive power, and an imaging surface IMA.

[0130] The first lens group G1 comprises a first lens L1, a second lens L2, and a third lens L3. The first lens L1 has positive refractive power, and its object side surface S1 is a convex surface and its image side surface S2 is a convex surface. The second lens L2 has negative refractive power, and its object side surface S2 is a concave surface and its image side surface S3 is a convex surface. The third lens L3 has positive refractive power, and its object side surface S4 is a convex surface and its image side surface S5 is a concave surface. The first lens L1 and the second lens L2 are cemented to form a double cemented lens.

[0131] The second lens group G2 includes a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7. The fourth lens L4 can have a negative focal power, its object side surface S6 is concave, and its image side surface S7 is concave. The fifth lens L5 can have a negative focal power, its object side surface S8 is concave, and its image side surface S9 is concave. The sixth lens L6 can have a positive focal power, its object side surface S9 is convex, and its image side surface S10 is convex. The seventh lens L7 can have a negative focal power, its object side surface S10 is concave, and its image side surface S11 is concave. The fifth lens L5, the sixth lens L6 and the seventh lens L7 are cemented and form a double cemented lens.

[0132] The third lens group G3 includes an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, a twelfth lens L12 and a thirteenth lens L13. The eighth lens L8 can have a positive focal power, its object side surface S13 is convex, and its image side surface S14 is concave. The ninth lens L9 can have a positive focal power, its object side surface S15 is convex, and its image side surface S16 is convex. The tenth lens L10 can have a negative focal power, its object side surface S16 is concave, and its image side surface S17 is concave. The eleventh lens L11 can have a positive focal power, its object side surface S17 is convex, and its image side surface S18 is concave. The twelfth lens L12 can have a positive focal power, its object side surface S19 is convex, and its image side surface S20 is convex. The thirteenth lens L13 can have a negative focal power, its object side surface S21 is concave, and its image side surface S22 is concave. The ninth lens L9, the tenth lens L10 and the eleventh lens L11 are cemented and form a triple cemented lens.

[0133] The fourth lens group G4 includes a fourteenth lens L14, a fifteenth lens L15 and a sixteenth lens L16. The fourteenth lens L14 can have a positive focal power, its object side surface S23 is convex, and its image side surface S24 is convex. The fifteenth lens L15 can have a positive focal power, its object side surface S25 is concave, and its image side surface S26 is convex. The sixteenth lens L16 has a negative focal power, its object side surface S27 is concave, and its image side surface S28 is concave.

[0134] The fifth lens group G5 includes a seventeenth lens L17. The seventeenth lens L17 has a negative focal power, its object side surface S29 is convex, and its image side surface S30 is concave.

[0135] The zoom lens 200 can further include a stop STO disposed between the second lens group G2 and the third lens group G3, more specifically, the stop STO can be disposed between the seventh lens L7 and the eighth lens L8. Optionally, the zoom lens 100 can further include a filter (not shown) having a first side and a second side and / or a cover glass CG having a first side S31 and a second side S32. Light from an object passes through each surface S1 to S32 in sequence and is finally imaged on an image plane IMA, where an image sensor chip can be disposed.

[0136] Table 4 shows a basic parameter table of the zoom lens 200 of Example 2, where the units of the radius of curvature and the thickness / distance are all in millimeters (mm).

[0137] Table 4

[0138]

[0139] Table 5 shows the values of T0, T1, T2 and T3 in Table 4 when the zoom lens 200 is at the wide-angle end and the telephoto end, respectively. Table 5 also shows the values of the total effective focal length F, the F-number Fno and the optical distortion DIS of the zoom lens 200 of Example 2 when the zoom lens 200 is at the wide-angle end and the telephoto end, respectively, where F and DIS vary as the zoom lens 200 switches from the wide-angle end to the telephoto end or vice versa, and Fno remains unchanged. The units of T0, T1, T2, T3 and F in Table 5 are all in millimeters (mm).

[0140] Table 5

[0141]

[0142] Table 6 gives the conic coefficients k and the higher order coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 and A 16 of the aspherical surfaces used in Example 2, where each aspherical surface can be defined by the formula (1) given in Example 1 above.

[0143] Table 6

[0144]

[0145] Figure 2C andFigure 2D These are distortion images of the zoom lens 200 at the wide-angle and telephoto ends according to Embodiment 2 of this application. Figure 2C and Figure 2D It can be seen that the zoom lens 200 given in Example 2 can achieve good imaging quality at different focal lengths.

[0146] Example 3

[0147] The following is for reference Figures 3A to 3D The zoom lens 300 according to Embodiment 3 of this application is described. Figure 3A This is a schematic diagram of the zoom lens 300 at the wide-angle end according to Embodiment 3 of this application. Figure 3B This is a schematic diagram of the zoom lens 300 at the telephoto end according to Embodiment 3 of this application.

[0148] like Figure 3A and Figure 3B As shown, the zoom lens 300 includes, from the object side to the image side, the following elements in sequence: a first lens group G1 with positive optical power, a second lens group G2 with negative optical power, a third lens group G3 with positive optical power, a fourth lens group G4 with positive optical power, a fifth lens group G5 with negative optical power, and an imaging plane IMA.

[0149] The first lens group G1 includes a first lens L1, a second lens L2, and a third lens L3. The first lens L1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens L2 has negative optical power, with its object-side surface S2 being concave and its image-side surface S3 being convex. The third lens L3 has positive optical power, with its object-side surface S4 being convex and its image-side surface S5 being concave. The first lens L1 and the second lens L2 are cemented together to form a cemented doublet lens.

[0150] The second lens group G2 includes a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fourth lens L4 can have negative optical power, with its object-side surface S6 being convex and its image-side surface S7 being concave. The fifth lens L5 can have negative optical power, with its object-side surface S8 being concave and its image-side surface S9 being concave. The sixth lens L6 can have positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The seventh lens L7 can have negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented doublet lens.

[0151] The third lens group G3 includes an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens Ll l, a twelfth lens L12 and a thirteenth lens L13. The eighth lens L8 can have positive refractive power, its object side surface S14 is a convex surface, and its image side surface S15 is a concave surface. The ninth lens L9 can have positive refractive power, its object side surface S16 is a convex surface, and its image side surface S17 is a convex surface. The tenth lens L10 can have negative refractive power, its object side surface S17 is a concave surface, and its image side surface S18 is a concave surface. The eleventh lens Ll l can have positive refractive power, its object side surface S18 is a convex surface, and its image side surface S19 is a concave surface. The twelfth lens L12 can have positive refractive power, its object side surface S20 is a convex surface, and its image side surface S21 is a convex surface. The thirteenth lens L13 can have negative refractive power, its object side surface S22 is a concave surface, and its image side surface S23 is a concave surface. The ninth lens L9, the tenth lens L10 and the eleventh lens Ll l are cemented together to form a three-cemented lens.

[0152] The fourth lens group G4 includes a fourteenth lens L14, a fifteenth lens L15 and a sixteenth lens L16. The fourteenth lens L14 can have positive refractive power, its object side surface S24 is a convex surface, and its image side surface S25 is a convex surface. The fifteenth lens L15 can have positive refractive power, its object side surface S26 is a concave surface, and its image side surface S27 is a convex surface. The sixteenth lens L16 has negative refractive power, its object side surface S28 is a concave surface, and its image side surface S29 is a concave surface.

[0153] The fifth lens group G5 includes a seventeenth lens L17. The seventeenth lens L17 has negative refractive power, its object side surface S30 is a convex surface, and its image side surface S31 is a concave surface.

[0154] The zoom lens 300 can further include a stop STO disposed between the second lens group G2 and the third lens group G3, more specifically, the stop STO can be disposed between the seventh lens L7 and the eighth lens L8. Optionally, the zoom lens 100 can further include a filter (not shown) having a first side surface and a second side surface and / or a cover glass CG having a first side surface S32 and a second side surface S33. Light from an object passes through the surfaces S1 to S33 in sequence and is finally imaged on an image plane IMA, where an image sensor chip can be disposed.

[0155] Table 7 shows a basic parameter table of the zoom lens 300 of embodiment 3, where the units of the radius of curvature and the thickness / distance are millimeters (mm).

[0156] Table 7

[0157]

[0158] Table 8 shows the values of T0, T1, T2 and T3 in Table 7 when the zoom lens 300 is at the wide-angle end and the telephoto end, respectively. Table 8 also shows the values of the total effective focal length F, the F number Fno and the optical distortion DIS of the zoom lens 300 of Embodiment 3 when the zoom lens 300 is at the wide-angle end and the telephoto end, respectively, wherein F and DIS vary as the zoom lens 300 switches from the wide-angle end to the telephoto end or from the telephoto end to the wide-angle end, and Fno remains unchanged. The units of T0, T1, T2, T3 and F in Table 8 are millimeters (mm), and the unit of FOV is degree (°).

[0159] Table 8

[0160]

[0161] Table 9 gives the conic coefficients k and the higher order coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 and A 16 of the aspherical surfaces used in Embodiment 3, wherein each aspherical surface can be defined by the formula (1) given in Embodiment 1.

[0162] Table 9

[0163]

[0164] Figure 3C and Figure 3D are the distortion maps of the zoom lens 300 according to Embodiment 3 when the zoom lens 300 is at the wide-angle end and the telephoto end, respectively. According to Figure 3C and Figure 3D , it can be seen that the zoom lens 300 given in Embodiment 3 can achieve good imaging quality at different focal lengths.

[0165] Example 4

[0166] The zoom lens 400 according to Embodiment 4 of the present application is described below with reference to Figures 4A to 4D Figure 4A is a structural schematic view of the zoom lens 400 according to Embodiment 4 of the present application when the zoom lens 400 is at the wide-angle end, Figure 4B is a structural schematic view of the zoom lens 400 according to Embodiment 4 of the present application when the zoom lens 400 is at the telephoto end.

[0167] As Figure 4A and​Figure 4B As shown, the zoom lens 400 includes, in order from the object side to the image side, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, a fourth lens group G4 having positive refractive power, a fifth lens group G5 having negative refractive power, and an imaging plane IMA.

[0168] The first lens group G1 includes a first lens L1, a second lens L2, and a third lens L3. The first lens L1 has positive refractive power, with a convex object side surface S1 and a convex image side surface S2. The second lens L2 has negative refractive power, with a concave object side surface S2 and a convex image side surface S3. The third lens L3 has positive refractive power, with a convex object side surface S4 and a concave image side surface S5. The first lens L1 and the second lens L2 are cemented and form a double cemented lens.

[0169] The second lens group G2 includes a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fourth lens L4 can have negative refractive power, with a convex object side surface S6 and a concave image side surface S7. The fifth lens L5 can have negative refractive power, with a concave object side surface S8 and a concave image side surface S9. The sixth lens L6 can have positive refractive power, with a convex object side surface S9 and a convex image side surface S10. The seventh lens L7 can have negative refractive power, with a concave object side surface S10 and a concave image side surface S11. The fifth lens L5, the sixth lens L6, and the seventh lens L7 are cemented and form a double cemented lens.

[0170] The third lens group G3 includes an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, a twelfth lens L12, and a thirteenth lens L13. The eighth lens L8 can have positive refractive power, with a convex object side surface S13 and a concave image side surface S14. The ninth lens L9 can have positive refractive power, with a convex object side surface S15 and a convex image side surface S16. The tenth lens L10 can have negative refractive power, with a concave object side surface S16 and a concave image side surface S17. The eleventh lens L11 can have positive refractive power, with a convex object side surface S17 and a concave image side surface S18. The twelfth lens L12 can have positive refractive power, with a convex object side surface S19 and a convex image side surface S20. The thirteenth lens L13 can have negative refractive power, with a concave object side surface S21 and a concave image side surface S22. The ninth lens L9, the tenth lens L10, and the eleventh lens L11 are cemented and form a triple cemented lens.

[0171] The fourth lens group G4 includes a fourteenth lens L14, a fifteenth lens L15 and a sixteenth lens L16. The fourteenth lens L14 can have positive refractive power, its object side surface S23 is a convex surface, and its image side surface S24 is a convex surface. The fifteenth lens L15 can have positive refractive power, its object side surface S25 is a concave surface, and its image side surface S26 is a convex surface. The sixteenth lens L16 has negative refractive power, its object side surface S27 is a concave surface, and its image side surface S28 is a concave surface.

[0172] The fifth lens group G5 includes a seventeenth lens L17. The seventeenth lens L17 has negative refractive power, its object side surface S29 is a convex surface, and its image side surface S30 is a concave surface.

[0173] The zoom lens 400 can further include a stop STO disposed between the second lens group G2 and the third lens group G3, more specifically, the stop STO can be disposed between the seventh lens L7 and the eighth lens L8. Optionally, the zoom lens 100 can further include a filter (not shown) having a first side surface and a second side surface and / or a cover glass CG having a first side surface S31 and a second side surface S32. Light from an object passes through the surfaces S1-S32 in sequence and is finally imaged on an image plane IMA, where an image sensor chip can be disposed.

[0174] Table 10 shows a basic parameter table of the zoom lens 400 of embodiment 4, where the units of the radius of curvature and the thickness / distance are millimeters (mm).

[0175] Table 10

[0176]

[0177] Table 11 shows the values of T0, T1, T2 and T3 in Table 10 when the zoom lens 400 is at the wide-angle end and the telephoto end, respectively. Table 11 also shows the values of the total effective focal length F, the F number Fno and the optical distortion DIS of the zoom lens 400 of embodiment 4 when the zoom lens 400 is at the wide-angle end and the telephoto end, respectively, where F and DIS vary as the zoom lens 400 switches from the wide-angle end to the telephoto end or vice versa, and Fno remains unchanged. The units of T0, T1, T2, T3 and F in Table 11 are millimeters (mm).

[0178] Table 11

[0179]

[0180] Table 12 gives the conic coefficients k and the higher order coefficients A 4 , A 6 , A8 , A 10 , A 12 , A 14 and A 16 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0181] Table 12

[0182]

[0183] Figure 4C and Figure 4D These are distortion images of the zoom lens 400 at the wide-angle and telephoto ends according to Embodiment 4 of this application. Figure 4C and Figure 4D It can be seen that the zoom lens 400 given in Example 4 can achieve good imaging quality at different focal lengths.

[0184] Example 5

[0185] The following is for reference Figures 5A to 5D The zoom lens 500 according to Embodiment 5 of this application is described. Figure 5A This is a schematic diagram of the zoom lens 500 at the wide-angle end according to Embodiment 5 of this application. Figure 5B This is a schematic diagram of the zoom lens 500 at the telephoto end according to Embodiment 5 of this application.

[0186] like Figure 5A and Figure 5B As shown, the zoom lens 500 includes, from the object side to the image side, the following elements in sequence: a first lens group G1 with positive optical power, a second lens group G2 with negative optical power, a third lens group G3 with positive optical power, a fourth lens group G4 with positive optical power, a fifth lens group G5 with positive optical power, and an imaging plane IMA.

[0187] The first lens group G1 includes a first lens L1, a second lens L2, and a third lens L3. The first lens L1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens L2 has negative optical power, with its object-side surface S2 being concave and its image-side surface S3 being convex. The third lens L3 has positive optical power, with its object-side surface S4 being convex and its image-side surface S5 being concave. The first lens L1 and the second lens L2 are cemented together to form a cemented doublet lens.

[0188] The second lens group G2 includes a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7. The fourth lens L4 can have a negative focal power, its object side surface S6 is a convex surface, and its image side surface S7 is a concave surface. The fifth lens L5 can have a negative focal power, its object side surface S8 is a concave surface, and its image side surface S9 is a concave surface. The sixth lens L6 can have a positive focal power, its object side surface S9 is a convex surface, and its image side surface S10 is a convex surface. The seventh lens L7 can have a negative focal power, its object side surface S10 is a concave surface, and its image side surface S11 is a concave surface. The fifth lens L5, the sixth lens L6 and the seventh lens L7 are cemented and form a double cemented lens.

[0189] The third lens group G3 includes an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, a twelfth lens L12 and a thirteenth lens L13. The eighth lens L8 can have a positive focal power, its object side surface S13 is a convex surface, and its image side surface S14 is a concave surface. The ninth lens L9 can have a positive focal power, its object side surface S15 is a convex surface, and its image side surface S16 is a convex surface. The tenth lens L10 can have a negative focal power, its object side surface S16 is a concave surface, and its image side surface S17 is a concave surface. The eleventh lens L11 can have a positive focal power, its object side surface S17 is a convex surface, and its image side surface S18 is a concave surface. The twelfth lens L12 can have a positive focal power, its object side surface S19 is a convex surface, and its image side surface S20 is a convex surface. The thirteenth lens L13 can have a negative focal power, its object side surface S21 is a concave surface, and its image side surface S22 is a concave surface. The ninth lens L9, the tenth lens L10 and the eleventh lens L11 are cemented and form a triple cemented lens.

[0190] The fourth lens group G4 includes a fourteenth lens L14, a fifteenth lens L15 and a sixteenth lens L16. The fourteenth lens L14 can have a positive focal power, its object side surface S23 is a convex surface, and its image side surface S24 is a convex surface. The fifteenth lens L15 can have a positive focal power, its object side surface S25 is a concave surface, and its image side surface S26 is a convex surface. The sixteenth lens L16 has a negative focal power, its object side surface S27 is a concave surface, and its image side surface S28 is a concave surface.

[0191] The fifth lens group G5 includes a seventeenth lens L17. The seventeenth lens L17 has a positive focal power, its object side surface S29 is a convex surface, and its image side surface S30 is a concave surface.

[0192] The zoom lens 500 can further include a stop STO disposed between the second lens group G2 and the third lens group G3, more specifically, the stop STO can be disposed between the seventh lens L7 and the eighth lens L8. Optionally, the zoom lens 100 can further include a filter (not shown) having a first side and a second side and / or a cover glass CG having a first side S31 and a second side S32. Light from an object passes through the surfaces S1 to S32 in sequence and is finally imaged on an image plane IMA, wherein an image sensing chip can be disposed at the image plane IMA.

[0193] Table 13 shows a basic parameter table of the zoom lens 500 of Example 5, wherein the units of the radius of curvature and the thickness / distance are all in millimeter (mm).

[0194] Table 13

[0195]

[0196] Table 14 shows the values of T0, T1, T2 and T3 in Table 10 when the zoom lens 500 is at the wide-angle end and the telephoto end, respectively. Table 14 also shows the values of the total effective focal length F, the F-number Fno and the optical distortion DIS of the zoom lens 500 of Example 5 when the zoom lens 500 is at the wide-angle end and the telephoto end, respectively, wherein the F and DIS vary as the zoom lens 500 switches from the wide-angle end to the telephoto end or vice versa, and the Fno remains unchanged. The units of T0, T1, T2, T3 and F in Table 14 are all in millimeter (mm).

[0197] Table 14

[0198]

[0199] Table 15 gives the conic coefficients k and higher order coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 and A 16 of the aspherical surfaces used in Example 5, wherein each aspherical surface can be defined by the formula (1) given in Example 1 above.

[0200] Table 15

[0201]

[0202] Figure 5Cand Figure 5D are the distortion maps of the zoom lens 500 according to Embodiment 5 of the present application at the wide-angle end and the telephoto end, respectively. According to the Figure 5C and Figure 5D It can be seen that the zoom lens 500 given in Embodiment 5 can achieve good imaging quality at different focal length states.

[0203] In summary, Embodiments 1 to 5 respectively satisfy the relationships shown in Table 16.

[0204] Table 16

[0205]

[0206] The above description is merely preferred embodiments of the present application and the technical principles of the application. Those skilled in the art should understand that the scope of the application disclosed in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combinations of the above technical features or equivalent features without departing from the inventive concept. For example, the above features can be replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A zoom lens, characterized in that, In order from the object side to the image side along the optical axis, comprises: a first lens group with positive refractive power, which is a fixed group; a second lens group with negative refractive power, which is a zoom group; a third lens group with positive refractive power, which is a fixed group; a fourth lens group with positive refractive power, which is a compensation group; and a fifth lens group with positive or negative refractive power, which is a fixed group; wherein, the first lens group comprises, in order from the object side to the image side along the optical axis: a first lens, a second lens, and a third lens; the second lens group comprises, in order from the object side to the image side along the optical axis: a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the third lens group comprises, in order from the object side to the image side along the optical axis: an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, and a thirteenth lens; the fourth lens group comprises, in order from the object side to the image side along the optical axis: a fourteenth lens, a fifteenth lens, and a sixteenth lens; the fifth lens group comprises: a seventeenth lens; the second lens group moves between the object side and the image side along the optical axis to achieve continuous zooming between a wide-angle end and a telephoto end; the fourth lens group moves between the object side and the image side along the optical axis to achieve compensation for changes in image plane position during zooming; the number of lens groups with refractive power in the zoom lens is five; and the zoom lens satisfies: 1.41 ≤ f1 / FG1 ≤ 1.6, where f1 is the effective focal length of the first lens and FG1 is the effective focal length of the first lens group.

2. The zoom lens according to claim 1, wherein: the first lens has positive refractive power; the second lens has negative refractive power; the third lens has positive refractive power.

3. The zoom lens according to claim 2, wherein: the object side surface of the first lens is convex, and the image side surface is convex; the object side surface of the second lens is concave, and the image side surface is convex; the object side surface of the third lens is convex, and the image side surface is concave.

4. The zoom lens according to claim 1, wherein: the fourth lens has negative refractive power; the fifth lens has negative refractive power; the sixth lens has positive refractive power; the seventh lens has negative refractive power.

5. The zoom lens according to claim 4, wherein: the image side surface of the fourth lens is concave; the object side surface of the fifth lens is concave, and the image side surface is concave; the object side surface of the sixth lens is convex, and the image side surface is convex; the object side surface of the seventh lens is concave, and the image side surface is concave.

6. The zoom lens according to claim 1, wherein: the eighth lens has positive refractive power; the ninth lens has positive refractive power; the tenth lens has negative refractive power; the eleventh lens has positive refractive power; the twelfth lens has positive refractive power; the thirteenth lens has negative refractive power.

7. The zoom lens according to claim 6, wherein: The object side surface of the eighth lens is convex, and the image side surface is concave; The object side surface of the ninth lens is convex, and the image side surface is convex; The object side surface of the tenth lens is concave, and the image side surface is concave; The object side surface of the eleventh lens is convex, and the image side surface is concave; The object side surface of the twelfth lens is convex, and the image side surface is convex; The image side surface of the thirteenth lens is concave, and the image side surface is concave.

8. The zoom lens according to claim 1, wherein The fourteenth lens has positive refractive power; The fifteenth lens has positive refractive power; The sixteenth lens has negative refractive power.

9. The zoom lens according to claim 8, wherein The object side surface of the fourteenth lens is convex, and the image side surface is convex; The object side surface of the fifteenth lens is concave, and the image side surface is convex; The object side surface of the sixteenth lens is concave, and the image side surface is concave.

10. The zoom lens according to claim 1, wherein The seventeenth lens has positive refractive power or negative refractive power.

11. The zoom lens according to claim 10, wherein The object side surface of the seventeenth lens is convex, and the image side surface is concave.

12. The zoom lens according to any one of claims 1 to 11, wherein The zoom lens satisfies 3.7 ≤ FG1 / Fw ≤ 6.2, where Fw is the total effective focal length of the zoom lens at the wide-angle end.

13. The zoom lens according to any one of claims 1 to 11, wherein The zoom lens satisfies -1.8 ≤ FG2 / Fw ≤ -1.4, where FG2 is the effective focal length of the second lens group, and Fw is the total effective focal length of the zoom lens at the wide-angle end.

14. The zoom lens according to any one of claims 1 to 11, wherein The zoom lens satisfies 1.56 ≤ FG3 / Fw ≤ 2.3, where FG3 is the effective focal length of the third lens group, and Fw is the total effective focal length of the zoom lens at the wide-angle end.

15. The zoom lens according to any one of claims 1 to 11, wherein The zoom lens satisfies 2.23 ≤ FG4 / Fw ≤ 3, where FG4 is the effective focal length of the fourth lens group, and Fw is the total effective focal length of the zoom lens at the wide-angle end.

16. The zoom lens according to any one of claims 1 to 11, wherein The zoom lens satisfies 7.9 ≤ |FG5 / Fw| ≤ 32.5, where FG5 is the effective focal length of the fifth lens group, and Fw is the total effective focal length of the zoom lens at the wide-angle end.

17. The zoom lens according to any one of claims 1 to 11, wherein The zoom lens satisfies 1.6 ≤ D2 / IH ≤ 1.7, where D2 is the on-axis distance between the position of the second lens group on the optical axis of the zoom lens at the wide-angle end and the position of the second lens group on the optical axis of the zoom lens at the telephoto end, and IH is the maximum image height of the zoom lens.

18. The zoom lens according to any one of claims 1-11, wherein the zoom lens satisfies 4.16 < TTL / D2 < 4.37, where TTL is an on-axis distance from an object side surface of the first lens to an image plane of the zoom lens, and D2 is an on-axis distance between a position of the second lens group on the optical axis at the wide-angle end of the zoom lens and a position of the second lens group on the optical axis at the telephoto end of the zoom lens.

19. The zoom lens according to any one of claims 1-11, wherein the zoom lens satisfies 1.1 < D2 / Fw < 1.8, where D2 is an on-axis distance between a position of the second lens group on the optical axis at the wide-angle end of the zoom lens and a position of the second lens group on the optical axis at the telephoto end of the zoom lens, and Fw is a total effective focal length of the zoom lens at the wide-angle end.

20. The zoom lens according to any one of claims 1 to 11, wherein Abbe number Vd of at least one lens in the third lens group G3 satisfies: 50 ≤ Vd G3 ≤ 75.

21. The zoom lens according to any one of claims 1-11, wherein the zoom lens satisfies 0.18 < TG4 / FG4 < 0.31, where TG4 is a thickness of the fourth lens group on the optical axis, and FG4 is an effective focal length of the fourth lens group.

22. The zoom lens according to any one of claims 1-11, wherein the zoom lens satisfies 0.34 < Ft / FG1 < 0.6, where Ft is a total effective focal length of the zoom lens at the telephoto end.

23. The zoom lens according to any one of claims 1-11, wherein the zoom lens satisfies 1.46 < f8 / FG3 < 2.5, where f8 is an effective focal length of the eighth lens, and FG3 is an effective focal length of the third lens group.

24. The zoom lens according to any one of claims 1-11, wherein the zoom lens satisfies 6.98 < TTL / IH < 7.4, where TTL is an on-axis distance from an object side surface of the first lens to an image plane of the zoom lens, and IH is a maximum image height of the zoom lens.

25. The zoom lens according to any one of claims 1-11, wherein the zoom lens satisfies 36.4 < TTL / (Ft / Fw) < 41.4, where TTL is an on-axis distance from an object side surface of the first lens to an image plane of the zoom lens, Ft is a total effective focal length of the zoom lens at the telephoto end, and Fw is a total effective focal length of the zoom lens at the wide-angle end.

26. The zoom lens according to any one of claims 1-11, wherein the zoom lens satisfies 2.58 < (f12-f13) / FG3 < 3.24, where f12 is an effective focal length of the twelfth lens, f13 is an effective focal length of the thirteenth lens, and FG3 is an effective focal length of the third lens group.

27. The zoom lens according to any one of claims 1 to 11, wherein the zoom lens satisfies 2.0 < Ft / Fw < 2.5, where Ft is a total effective focal length of the zoom lens at the telephoto end, and Fw is a total effective focal length of the zoom lens at the wide-angle end.

28. The zoom lens according to any one of claims 1 to 11, wherein The zoom lens satisfies at least one of the following: 4.02≤FG1 / Fw≤6.12, -1.8≤FG2 / Fw≤-1.45, 1.66≤FG3 / Fw≤2.24, 2.48≤FG4 / Fw≤2.9, 7.95≤|FG5 / Fw|≤32.03, 1.65≤D2 / IH≤1.7, 4.2≤TTL / D2≤4.37, 1.2≤D2 / Fw≤1.7, 1.6≤f8 / FG3≤2.42, 7≤TTL / IH≤7.34, 36.99≤TTL / (Ft / Fw)≤40.75, 2.65≤(f12-f13) / FG3≤2.95, 2.2≤Ft / Fw≤2.43, where FG2 is the effective focal length of the second lens group, FG3 is the effective focal length of the third lens group, FG4 is the effective focal length of the fourth lens group, FG5 is the effective focal length of the fifth lens group, Fw is the total effective focal length of the zoom lens at the wide-angle end, D2 is the on-axis distance between the position of the second lens group on the optical axis at the wide-angle end and the position of the second lens group on the optical axis at the telephoto end of the zoom lens, IH is the maximum image height of the zoom lens, TTL is the on-axis distance from the object side of the first lens to the image plane of the zoom lens, Ft is the total effective focal length of the zoom lens at the telephoto end, f8 is the effective focal length of the eighth lens, f12 is the effective focal length of the twelfth lens, and f13 is the effective focal length of the thirteenth lens.

Images