Zoom lens and imaging device

Abstract

The present application relates to the field of optics, in particular to a zoom lens and an imaging device. The zoom lens sequentially comprises, from an object side to an image side, a first fixed lens group with positive refractive power, a variable magnification lens group with negative refractive power, a second fixed lens group with positive refractive power, and a focusing lens group with negative refractive power. The variable magnification lens group and the focusing lens group move along the main optical axis of the zoom lens. The zoom lens satisfies the following conditions: ft / fw>22; TTL<95mm; FOVm>50°; wherein ft is the focal length of the zoom lens in a telephoto state, fw is the focal length of the zoom lens in a wide-angle state, TTL is the total optical length of the zoom lens, and FOVm is the maximum field of view angle of the zoom lens. The zoom lens can achieve a large magnification and miniaturization effect, and can also achieve a large field of view angle effect, increasing the possibility of capturing a large number of scenes in the field of view and improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of optics, specifically to a zoom lens and an imaging device. Background Technology

[0002] A zoom lens is a camera lens that can change its focal length within a certain range to obtain different widths of field of view, different sizes of images, and different ranges of scenery. A zoom lens can change the shooting range by changing the focal length without changing the shooting distance, which is very beneficial for image composition.

[0003] For high-magnification, multi-group zoom lenses, due to the need for high magnification, there are usually more lens elements and a larger zoom range. Moving the lens groups requires a greater distance to zoom. High-magnification zoom lenses usually sacrifice the field of view, making it difficult to capture a large amount of scene within the field of view, thus reducing the user experience. Summary of the Invention

[0004] This invention will solve the existing technical problems and provide a zoom lens and imaging device that can achieve the effects of high magnification and miniaturization of the zoom lens, while also achieving the effect of a wide field of view, increasing the possibility of capturing a large number of scenes within the field of view and improving the user experience.

[0005] The technical solution provided by this invention is as follows: A zoom lens, comprising, from the object plane side to the image plane side, a first fixed lens group with positive optical power, a zoom lens group with negative optical power, a second fixed lens group with positive optical power, and a focusing lens group with negative optical power; the zoom lens group and the focusing lens group are movable along the principal optical axis of the zoom lens; the first fixed lens group, from the object plane side to the image plane side, comprises a first fixed lens with negative optical power, a second fixed lens with positive optical power, a third fixed lens with positive optical power, and a fourth fixed lens with positive optical power. The first fixed lens and the second fixed lens are cemented together; the second fixed lens group consists of a fifth fixed lens with positive optical power and a sixth fixed lens with negative optical power, arranged sequentially from the object plane side to the image plane side; the zoom lens satisfies the following conditions: ft / fw > 22; TTL < 95mm; FOVm > 50°; where ft is the focal length of the zoom lens in telephoto mode, fw is the focal length of the zoom lens in wide-angle mode, TTL is the total optical length of the zoom lens, and FOVm is the maximum field of view of the zoom lens.

[0006] In this technical solution, by limiting the lens group and parameters mentioned above, it is possible to achieve both high magnification and miniaturization of the zoom lens, while also achieving a wide field of view, increasing the possibility of capturing a large number of scenes within the field of view and enhancing the user experience.

[0007] Preferably, the zoom lens group consists of a first zoom lens with negative optical power, a second zoom lens with negative optical power, and a third zoom lens with positive optical power, arranged sequentially from the object plane side to the image plane side.

[0008] Preferably, the zoom lens group consists of a first zoom lens with negative optical power, a second zoom lens with negative optical power, a third zoom lens with positive optical power, and a fourth zoom lens with negative optical power, arranged sequentially from the object plane side to the image plane side, with the second zoom lens and the third zoom lens cemented together.

[0009] Preferably, the focusing lens group consists of a first focusing lens with positive optical power, a second focusing lens with negative optical power, and a third focusing lens with positive optical power, arranged sequentially from the object plane side to the image plane side, with the first focusing lens and the second focusing lens cemented together.

[0010] Preferably, the zoom lens satisfies the following condition: 1.4 < fG2 / fw < 1.6; Wherein, fG2 is the focal length of the zoom lens group.

[0011] In this technical solution, the zoom range is increased by setting the above-mentioned lens, realizing the effect of high magnification zoom of the zoom lens, and to a certain extent preventing the zoom lens from being too large.

[0012] Preferably, the zoom lens satisfies the following condition: 0.3 < XG2 / TTL < 0.4; XG4 / XG2 < 0.2; Wherein, XG2 is the maximum moving distance of the zoom lens group, and XG4 is the maximum moving distance of the focusing lens group.

[0013] In this technical solution, by limiting the above parameters, both the zoom lens group and the focusing lens can increase the resolution of the zoom lens, while preventing the zoom lens from becoming too large, thus achieving the miniaturization of the zoom lens.

[0014] Preferably, the zoom lens satisfies the following condition: 0.8 < R22 / R31 < 1.2; Wherein, R22 is the curved surface of the second zoom lens near the image plane, and R31 is the curved surface of the third zoom lens near the object plane.

[0015] In this technical solution, by limiting the above parameters, the optical path between the second zoom lens and the third zoom lens can be transmitted better, reducing the dissipation of the optical path, and also facilitating the adjustment of light during the zooming process of the zoom lens group.

[0016] Preferably, the zoom lens satisfies the following condition: 0.9 < R32 / R41 < 1.1; Wherein, R32 is the curved surface of the third zoom lens near the image plane, and R41 is the curved surface of the fourth zoom lens near the object plane.

[0017] In this technical solution, by limiting the above parameters, the fourth zoom lens can better receive the light from the third zoom lens, reducing the chromatic aberration and aberration of the zoom lens and increasing the resolution of the zoom lens.

[0018] One of the objectives of this invention is to provide an imaging device, comprising: a zoom lens; and an imaging element configured to receive an image formed by the zoom lens.

[0019] Compared with the prior art, the zoom lens and imaging device provided by the present invention have the following beneficial effects: 1. By limiting the lens group and parameters mentioned above, it is possible to achieve both high magnification and miniaturization of the zoom lens, while also achieving a wide field of view, increasing the possibility of capturing a large number of scenes within the field of view and enhancing the user experience.

[0020] 2. By limiting the parameters mentioned above, both the zoom lens group and the focusing lens can increase the resolution of the zoom lens, while preventing the zoom lens from becoming too large, thus achieving the miniaturization of the zoom lens.

[0021] 3. With the above parameters in place, the optical path between the second and third zoom lenses can be transmitted well, reducing light dissipation and facilitating the adjustment of light during zooming. Attached Figure Description

[0022] The preferred embodiments will now be described in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of a zoom lens and imaging device.

[0023] Figure 1 This is a schematic diagram of the structure of a zoom lens according to the present invention; Figure 2 This invention provides a coma diagram of a zoom lens in telephoto mode. Figure 3 This is an aberration diagram of a zoom lens in telephoto mode according to the present invention; Figure 4 This invention relates to a coma diagram of a zoom lens in a wide-angle state. Figure 5 This is an aberration diagram of a zoom lens in a wide-angle state according to the present invention; Figure 6 This is a schematic diagram of another zoom lens according to the present invention; Figure 7This is another coma diagram of the zoom lens in telephoto mode according to the present invention; Figure 8 This is another aberration diagram of the zoom lens in telephoto mode according to the present invention; Figure 9 This is another coma diagram of the zoom lens in the wide-angle state according to the present invention; Figure 10 This is another aberration diagram of the zoom lens in the wide-angle state according to the present invention.

[0024] Explanation of reference numerals: G1, First fixed lens group; G2, Zoom lens group; G3, Second fixed lens group; G4, Focusing lens group; G5, Auxiliary component; a1, First fixed lens; a2, Second fixed lens; a3, Third fixed lens; a4, Fourth fixed lens; a5, Fifth fixed lens; a6, Sixth fixed lens; b1, First zoom lens; b2, Second zoom lens; b3, Third zoom lens; b4, Fourth zoom lens; c1, First focusing lens; c2, Second focusing lens; c3, Third focusing lens; STO, Aperture stop; CG, Protective glass. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one." Example

[0027] like Figure 1 and Figure 6 As shown, a zoom lens is composed of a first fixed lens group G1 with positive optical power, a zoom lens group G2 with negative optical power, a second fixed lens group G3 with positive optical power, and a focusing lens group G4 with negative optical power, arranged sequentially from the object plane side to the image plane side. The zoom lens group G2 and the focusing lens group G4 move along the main optical axis of the zoom lens; The first fixed lens group G1 consists of a first fixed lens a1 with negative optical power, a second fixed lens a2 with positive optical power, a third fixed lens a3 with positive optical power, and a fourth fixed lens a4 with positive optical power, from the object plane side to the image plane side. The first fixed lens a1 and the second fixed lens a2 are cemented together. The second fixed lens group G3 consists of a fifth fixed lens a5 with positive optical power and a sixth fixed lens a6 with negative optical power, from the object plane side to the image plane side. The zoom lens satisfies the following condition: ft / fw > 22; TTL < 95mm; FOVm > 50°; Wherein, ft is the focal length of the zoom lens in telephoto mode, fw is the focal length of the zoom lens in wide-angle mode, TTL is the total optical length of the zoom lens, and FOVm is the maximum field of view of the zoom lens.

[0028] In this embodiment, by limiting the lens group and parameters described above, it is possible to achieve both high magnification and miniaturization of the zoom lens, while also achieving a wide field of view, increasing the possibility of capturing a large number of scenes within the field of view and enhancing the user experience.

[0029] The zoom lens group G2 consists of a first zoom lens b1 with negative optical power, a second zoom lens b2 with negative optical power, and a third zoom lens b3 with positive optical power, arranged sequentially from the object plane side to the image plane side.

[0030] The zoom lens group G2 consists of a first zoom lens b1 with negative optical power, a second zoom lens b2 with negative optical power, a third zoom lens b3 with positive optical power, and a fourth zoom lens b4 with negative optical power, arranged sequentially from the object plane side to the image plane side. The second zoom lens b2 and the third zoom lens b3 are cemented together.

[0031] The focusing lens group G4 consists of a first focusing lens c1 with positive optical power, a second focusing lens c2 with negative optical power, and a third focusing lens c3 with positive optical power, arranged sequentially from the object plane side to the image plane side. The first focusing lens c1 and the second focusing lens c2 are cemented together.

[0032] The zoom lens satisfies the following condition: 1.4 < fG2 / fw < 1.6; Wherein, fG2 is the focal length of the zoom lens group G2.

[0033] By setting the lens as described above, the zoom range is increased, achieving the effect of high-magnification zoom of the zoom lens, and to a certain extent preventing the zoom lens from becoming too large.

[0034] The zoom lens satisfies the following condition: 0.3 < XG2 / TTL < 0.4; XG4 / XG2 < 0.2; Wherein, XG2 is the maximum moving distance of the zoom lens group G2, and XG4 is the maximum moving distance of the focusing lens group G4.

[0035] By limiting the parameters mentioned above, both the zoom lens group G2 and the focusing lens group G4 can increase the resolution of the zoom lens, while preventing the zoom lens from becoming too large, thus achieving the miniaturization of the zoom lens.

[0036] The zoom lens satisfies the following condition: 0.8 < R22 / R31 < 1.2; Wherein, R22 is the curved surface of the second zoom lens b2 near the image plane, and R31 is the curved surface of the third zoom lens b3 near the object plane.

[0037] With the above parameters in place, the optical path between the second zoom lens b2 and the third zoom lens b3 can be transmitted well, reducing the dissipation of the optical path, and also facilitating the adjustment of light during the zooming process of the zoom lens group G2.

[0038] The zoom lens satisfies the following condition: 0.9 < R32 / R41 < 1.1; Wherein, R32 is the curved surface of the third zoom lens b3 near the image plane, and R41 is the curved surface of the fourth zoom lens b4 near the object plane.

[0039] With the above parameters in place, the fourth zoom lens b4 can receive the light from the third zoom lens b3 better, reducing chromatic aberration and image aberration of the zoom lens and increasing the resolution of the zoom lens. Example

[0040] like Figures 1 to 5 As shown, a zoom lens is composed of a first fixed lens group G1 with positive optical power, a zoom lens group G2 with negative optical power, a second fixed lens group G3 with positive optical power, a focusing lens group G4 with negative optical power, and an auxiliary component G5, arranged sequentially from the object plane side to the image plane side. The zoom lens group G2 and the focusing lens group G4 move along the main optical axis of the zoom lens; The first fixed lens group G1 consists of a first fixed lens a1 with negative optical power, a second fixed lens a2 with positive optical power, a third fixed lens a3 with positive optical power, and a fourth fixed lens a4 with positive optical power, from the object plane side to the image plane side. The first fixed lens a1 and the second fixed lens a2 are cemented together. The zoom lens group G2 consists of a first zoom lens b1 with negative optical power, a second zoom lens b2 with negative optical power, and a third zoom lens b3 with positive optical power, arranged sequentially from the object plane side to the image plane side.

[0041] The second fixed lens group G3 consists of a fifth fixed lens a5 with positive optical power and a sixth fixed lens a6 with negative optical power, from the object plane side to the image plane side. The focusing lens group G4 consists of a first focusing lens c1 with positive optical power, a second focusing lens c2 with negative optical power, and a third focusing lens c3 with positive optical power, arranged sequentially from the object plane side to the image plane side. The first focusing lens c1 and the second focusing lens c2 are cemented together.

[0042] The auxiliary component G5 is a protective glass CG.

[0043] The basic lens data of the zoom lens in this embodiment is shown in Table 1, the variable parameters in Table 1 are shown in Table 2, and the aspherical coefficients are shown in Table 3.

[0044] The surface number column shows the surface number when the object-side surface is set as surface 1 and the numbering is increased sequentially towards the image side; the surface type column shows the surface type of a lens; the radius of curvature column shows the radius of curvature of a lens, where a positive radius of curvature indicates that the surface is curved towards the object side and a negative radius of curvature indicates that the surface is curved towards the image side; the center thickness column shows the surface spacing on the optical axis between each surface and the surface adjacent to it on the image side; the refractive index column shows the refractive index of a lens; and the Abbe number column shows the Abbe number of a lens.

[0045] In Table 2, the WIDE column indicates the specific values ​​of each variable parameter when the zoom lens is in the wide-angle position, and the TELE column indicates the specific values ​​of each variable parameter when the zoom lens is in the telephoto position.

[0046] In Table 3, K is the conic coefficient, and e is the scientific notation, for example, e-05 represents 10. -5 .

[0047] Table 1 OBJ S1 spherical 162.41 0.50 1.81 40.73 S2 spherical 36.30 7.10 1.50 81.61 S3 spherical -198.64 0.10 S4 spherical 36.78 4.89 1.50 81.61 S5 spherical 1679.27 0.10 S6 spherical 34.50 3.11 1.50 81.61 S7 spherical 95.07 D1 S8 spherical 1685.81 0.50 1.91 35.25 S9 spherical 7.84 3.41 S10 aspherical -18.30 0.50 1.58 59.46 S11 aspherical 22.45 0.10 S12 spherical 20.09 1.96 1.95 17.98 S13 spherical -154 D2 STO spherical INF 0.10 S15 aspherical 9.72 3.81 1.50 81.56 S16 aspherical -95.42 0.10 S17 spherical 11.64 3.34 1.95 17.98 S18 spherical 6.99 D3 S19 spherical 33.14 3.48 1.50 81.61 S20 spherical -6.92 1.70 1.72 37.99 S21 spherical -45.69 0.10 S22 spherical 20.43 2.90 1.50 81.61 S23 spherical -15.49 D4 S24 spherical INF 1.10 1.52 64.20 S25 spherical INF 1.00 IMG Table 2 D1 1.03 33.01 D2 32.68 0.7 D3 6.97 14.99 D4 9.92 1.9 Table 3 S13 6.37E+00 -5.95E-05 3.46E-06 -4.85E-08 4.65E-10 S14 -4.75E+00 -2.36E-04 5.59E-06 -2.09E-07 4.40E-09 S19 -3.88E-01 -2.81E-05 6.42E-07 -2.92E-08 8.11E-10 S20 -1.66E+00 5.10E-05 -6.24E-08 2.12E-08 -1.07E-09 In this embodiment, ft=130mm, fw=5.33mm, ft / fw=24.39, TTL=90.5mm, fno=1.66-4.42, FOV=2.24-54.98°, FOVm=54.98°; Wherein, ft is the focal length of the zoom lens in telephoto mode, fw is the focal length of the zoom lens in wide-angle mode, TTL is the total optical length of the zoom lens, fno is the aperture number of the zoom lens, FOV is the field of view of the zoom lens, and FOVm is the maximum field of view of the zoom lens.

[0048] fG2 = -8.41mm, fG2 / fw = 1.58; Wherein, fG2 is the focal length of the zoom lens group G2.

[0049] XG2=31.98mm, XG2 / TTL=0.353; XG4=8.02mm, XG4 / XG2=0.251.

[0050] Wherein, XG2 is the maximum moving distance of the zoom lens group G2, and XG4 is the maximum moving distance of the focusing lens group G4.

[0051] R22=22.45mm, R31=20.09mm, R22 / R31=1.12; Wherein, R22 is the curved surface of the second zoom lens b2 near the image plane, and R31 is the curved surface of the third zoom lens b3 near the object plane. Example

[0052] like Figures 6 to 10 As shown, a zoom lens is composed of a first fixed lens group G1 with positive optical power, a zoom lens group G2 with negative optical power, a second fixed lens group G3 with positive optical power, a focusing lens group G4 with negative optical power, and an auxiliary component G5, arranged sequentially from the object plane side to the image plane side. The zoom lens group G2 and the focusing lens group G4 move along the main optical axis of the zoom lens; The first fixed lens group G1 consists of a first fixed lens a1 with negative optical power, a second fixed lens a2 with positive optical power, a third fixed lens a3 with positive optical power, and a fourth fixed lens a4 with positive optical power, from the object plane side to the image plane side. The first fixed lens a1 and the second fixed lens a2 are cemented together. The zoom lens group G2 consists of a first zoom lens b1 with negative optical power, a second zoom lens b2 with negative optical power, a third zoom lens b3 with positive optical power, and a fourth zoom lens b4 with negative optical power, arranged sequentially from the object plane side to the image plane side. The second zoom lens b2 and the third zoom lens b3 are cemented together.

[0053] The second fixed lens group G3 consists of a fifth fixed lens a5 with positive optical power and a sixth fixed lens a6 with negative optical power, from the object plane side to the image plane side. The focusing lens group G4 consists of a first focusing lens c1 with positive optical power, a second focusing lens c2 with negative optical power, and a third focusing lens c3 with positive optical power, arranged sequentially from the object plane side to the image plane side. The first focusing lens c1 and the second focusing lens c2 are cemented together.

[0054] The auxiliary component G5 is a protective glass CG.

[0055] The basic lens data of the zoom lens in this embodiment is shown in Table 4, the variable parameters in Table 4 are shown in Table 5, and the aspherical coefficients are shown in Table 6.

[0056] The surface number column shows the surface number when the object-side surface is set as surface 1 and the numbering is increased sequentially towards the image side; the surface type column shows the surface type of a lens; the radius of curvature column shows the radius of curvature of a lens, where a positive radius of curvature indicates that the surface is curved towards the object side and a negative radius of curvature indicates that the surface is curved towards the image side; the center thickness column shows the surface spacing on the optical axis between each surface and the surface adjacent to it on the image side; the refractive index column shows the refractive index of a lens; and the Abbe number column shows the Abbe number of a lens.

[0057] In Table 5, the WIDE column indicates the specific values ​​of each variable parameter when the zoom lens is in the wide-angle position, and the TELE column indicates the specific values ​​of each variable parameter when the zoom lens is in the telephoto position.

[0058] In Table 6, K is the conic coefficient, and e is the scientific notation, for example, e-05 represents 10. -5 .

[0059] Table 4 OBJ S1 spherical 140.86 0.50 1.83 37.23 S2 spherical 39.87 6.57 1.50 81.61 S3 spherical -192.96 0.10 S4 spherical 38.84 4.42 1.50 81.61 S5 spherical 465.81 0.10 S6 spherical 31.38 3.46 1.50 81.61 S7 spherical 97.30 D1 S8 spherical 70.06 0.50 1.91 35.25 S9 spherical 8.51 3.36 S10 spherical -14.32 0.50 1.91 35.25 S11 spherical 1120.88 2.21 1.95 17.98 S12 spherical -14.00 0.58 S13 aspherical -13.76 0.50 1.59 61.25 S14 aspherical -94.17 D2 STO spherical INF 0.10 S16 aspherical 8.92 4.39 1.50 81.56 S17 aspherical -56.14 0.10 S18 spherical 16.06 2.62 1.62 36.30 S19 spherical 7.34 D3 S20 spherical 29.54 3.82 1.50 81.61 S21 spherical -7.66 0.50 1.70 41.15 S22 spherical -55.79 0.10 S23 spherical 20.09 3.43 1.50 81.61 S24 spherical -16.57 D4 S25 spherical INF 1.10 1.52 64.20 S26 spherical INF 1.00 　 　 IMG Table 5 D1 0.7 30.65 D2 30.65 0.7 D3 8.8 16.34 D4 10.39 2.85 Table 6 S13 1.59E+00 -6.74E-04 1.34E-05 -8.38E-08 1.09E-11 S14 9.90E+01 -7.55E-04 1.53E-05 -1.41E-07 3.27E-10 S19 -4.11E-01 -5.19E-05 2.20E-07 -2.39E-08 1.06E-09 S20 -4.72E+00 5.53E-05 -8.04E-07 5.61E-08 -1.82E-09 In this embodiment, ft=130mm, fw=5.3mm, ft / fw=24.53, TTL=90.5mm, fno=1.66-4.61, FOV=2.24-54.98°, FOVm=54.98°; Wherein, ft is the focal length of the zoom lens in telephoto mode, fw is the focal length of the zoom lens in wide-angle mode, TTL is the total optical length of the zoom lens, fno is the aperture number of the zoom lens, FOV is the field of view of the zoom lens, and FOVm is the maximum field of view of the zoom lens.

[0060] fG2 = -7.69mm, fG2 / fw = 1.45; Wherein, fG2 is the focal length of the zoom lens group G2.

[0061] XG2=29.95mm, XG2 / TTL=0.331; XG4=7.54mm, XG4 / XG2=0.252.

[0062] Wherein, XG2 is the maximum moving distance of the zoom lens group G2, and XG4 is the maximum moving distance of the focusing lens group G4.

[0063] R22=R31=1120.88mm, R22 / R31=1; Wherein, R22 is the curved surface of the second zoom lens b2 near the image plane, and R31 is the curved surface of the third zoom lens b3 near the object plane.

[0064] R32=-14.00, R41=-13.76mm, R32 / R41=1.02; Wherein, R32 is the curved surface of the third zoom lens b3 near the image plane, and R41 is the curved surface of the fourth zoom lens b4 near the object plane. Example

[0065] An imaging device, such as Figures 1 to 10 As shown, it includes: a zoom lens as described in any of the above embodiments, and an imaging element configured to receive an image formed by the zoom lens.

[0066] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A zoom lens, characterized in that, The zoom lens consists of a first fixed lens group with positive optical power, a zoom lens group with negative optical power, a second fixed lens group with positive optical power, and a focusing lens group with negative optical power, arranged sequentially from the object plane side to the image plane side. The zoom lens group and the focusing lens group move along the main optical axis of the zoom lens; The first fixed lens group consists of a first fixed lens with negative optical power, a second fixed lens with positive optical power, a third fixed lens with positive optical power, and a fourth fixed lens with positive optical power, from the object plane side to the image plane side. The first fixed lens and the second fixed lens are cemented together. The zoom lens group consists of a first zoom lens with negative optical power, a second zoom lens with negative optical power, and a third zoom lens with positive optical power, in sequence from the object plane side to the image plane side. The second fixed lens group consists of a fifth fixed lens with positive optical power and a sixth fixed lens with negative optical power, sequentially from the object plane side to the image plane side. The focusing lens group consists of a first focusing lens with positive optical power, a second focusing lens with negative optical power, and a third focusing lens with positive optical power, arranged sequentially from the object plane side to the image plane side. The first focusing lens and the second focusing lens are cemented together. The surface number column shows the surface number when the object-side surface is set as surface 1 and the numbering is increased sequentially towards the image side; the surface type column shows the surface type of a lens; the radius of curvature column shows the radius of curvature of a lens, with a positive radius of curvature indicating that the surface is curved towards the object side and a negative radius of curvature indicating that the surface is curved towards the image side; the center thickness column shows the surface spacing on the optical axis between each surface and the surface adjacent to it on the image side; the refractive index column shows the refractive index of a lens; and the Abbe number column shows the Abbe number of a lens. The WIDE column indicates the specific values ​​of each variable parameter when the zoom lens is in wide-angle mode, and the TELE column indicates the specific values ​​of each variable parameter when the zoom lens is in telephoto mode. The specific parameters are as follows: 。 2. A zoom lens, characterized in that, The zoom lens consists of a first fixed lens group with positive optical power, a zoom lens group with negative optical power, a second fixed lens group with positive optical power, and a focusing lens group with negative optical power, arranged sequentially from the object plane side to the image plane side. The zoom lens group and the focusing lens group move along the main optical axis of the zoom lens; The first fixed lens group consists of a first fixed lens with negative optical power, a second fixed lens with positive optical power, a third fixed lens with positive optical power, and a fourth fixed lens with positive optical power, from the object plane side to the image plane side. The first fixed lens and the second fixed lens are cemented together. The zoom lens group consists of a first zoom lens with negative optical power, a second zoom lens with negative optical power, a third zoom lens with positive optical power, and a fourth zoom lens with negative optical power, arranged sequentially from the object plane side to the image plane side. The second zoom lens and the third zoom lens are cemented together. The second fixed lens group consists of a fifth fixed lens with positive optical power and a sixth fixed lens with negative optical power, sequentially from the object plane side to the image plane side. The focusing lens group consists of a first focusing lens with positive optical power, a second focusing lens with negative optical power, and a third focusing lens with positive optical power, arranged sequentially from the object plane side to the image plane side. The first focusing lens and the second focusing lens are cemented together. The surface number column shows the surface number when the object-side surface is set as surface 1 and the numbering is increased sequentially towards the image side; the surface type column shows the surface type of a lens; the radius of curvature column shows the radius of curvature of a lens, with a positive radius of curvature indicating that the surface is curved towards the object side and a negative radius of curvature indicating that the surface is curved towards the image side; the center thickness column shows the surface spacing on the optical axis between each surface and the surface adjacent to it on the image side; the refractive index column shows the refractive index of a lens; and the Abbe number column shows the Abbe number of a lens. The WIDE column indicates the specific values ​​of each variable parameter when the zoom lens is in wide-angle mode, and the TELE column indicates the specific values ​​of each variable parameter when the zoom lens is in telephoto mode. The specific parameters are as follows: 。 3. An imaging device, characterized in that, include: The zoom lens as described in any one of claims 1 to 2; And an imaging element, configured to receive an image formed by the zoom lens.

Images