Zoom lens

Abstract

The utility model discloses a zoom lens, which relates to the technical field of zoom optical systems, is provided with an object side and an image side which are correspondingly arranged along the direction of an optical axis, and comprises a first lens group, a second lens group, a third lens group and a fourth lens group which are sequentially arranged from the object side to the image side, the second lens group and the fourth lens group are movably arranged in the optical axis direction, the second lens group is used for zooming, and the fourth lens group is used for focusing. In this way, the second lens group is movably arranged in the direction of the optical axis to zoom the zoom lens, and the fourth lens group cooperatively moves in the direction of the optical axis to focus the zoom lens, so that the zoom lens keeps clear imaging of the image surface in the zooming process, and the focal lengths of the four lens groups and the focal length of the wide-angle end of the zoom lens are conditionally limited, and the focal length of the wide-angle end of the zoom lens can be adjusted. And the lenses in the plurality of lens groups adopt a glass-plastic mixed form, so that the zoom lens which is wide in view field, small in size, low in cost and high in resolution is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of zoom optical systems, in particular to a zoom lens. Background Art

[0002] Existing lenses generally have the following shortcomings: small aperture, which cannot meet the brightness requirements of images in low-light environments; large image surface and small size cannot be taken into account at the same time, which cannot meet the space requirements of the lens; low resolution, the mainstream 1080P lens has a resolution of 2 million, which can no longer meet the high-pixel requirements of face recognition; infrared performance and high and low temperature performance cannot be taken into account at the same time, and the requirements of day and night confocality are often met by sacrificing high and low temperature performance, but this can no longer meet the real-time requirements of face recognition in high and low temperature environments. Utility Model Content

[0003] The main purpose of the utility model is to provide a zoom lens, aiming to solve the problems that the existing lens cannot take into account both large image surface and small volume, cannot meet the space requirements of the lens, and cannot meet the real-time requirements of face recognition in high and low temperature environments.

[0004] To achieve the above-mentioned object, the zoom lens provided by the utility model has an object side and an image side correspondingly arranged along the optical axis direction, the zoom lens comprises a first lens group, a second lens group, a third lens group, and a fourth lens group arranged in sequence from the object side to the image side, the second lens group and the fourth lens group are both movably arranged along the optical axis direction, the second lens group is used for zooming, and the fourth lens group is used for focusing;

[0005] The focal length of the zoom lens at the wide-angle end is fw, the focal length of the first lens group is f1, the focal length of the second lens group is f2, the focal length of the third lens group is f3, and the focal length of the fourth lens group is f4. The zoom lens meets the following conditions:

[0006] 0.13≤fw / f1≤0.45; and -1.50≤fw / f2≤-0.64; and 0.23≤fw / f3≤0.75; and 0.25≤fw / f4≤0.72.

[0007] In one embodiment, the optical power of the first lens group is positive;

[0008] The optical power of the second lens group is negative;

[0009] The optical power of the third lens group is positive;

[0010] The optical power of the fourth lens group is negative.

[0011] In one embodiment, the first lens group includes a first lens with a negative focal power, a second lens with a positive focal power, and a third lens with a positive focal power arranged in sequence along the optical axis direction. The first lens and the second lens are adhesively connected.

[0012] The focal length of the first lens is f11, the focal length of the second lens is f12, and the focal length of the third lens is f13. Wherein, -0.47 ≤ f1 / f11 ≤ -0.34; and 0.60 ≤ f1 / f12 ≤ 0.82; and 0.60 ≤ f1 / f13 ≤ 0.81.

[0013] In one embodiment, the second lens group includes a fourth lens with a negative focal power, a fifth lens with a negative focal power, and a sixth lens with a positive focal power arranged in sequence along the optical axis direction.

[0014] Both the fifth lens and the sixth lens are plastic lenses.

[0015] The focal length of the fourth lens is f21, the focal length of the fifth lens is f22, and the focal length of the sixth lens is f23. Wherein, 0.75 ≤ f2 / f21 ≤ 1.02; and 0.41 ≤ f2 / f22 ≤ 0.56; and -0.49 ≤ f2 / f23 ≤ -0.36.

[0016] In one embodiment, the third lens group includes a seventh lens with a positive focal power, an eighth lens with a positive focal power, a ninth lens with a positive focal power, and a tenth lens with a positive focal power arranged in sequence along the optical axis direction. The ninth lens and the tenth lens are adhesively connected.

[0017] The eighth lens is a plastic lens.

[0018] The focal length of the seventh lens is f31, the focal length of the eighth lens is f32, the focal length of the ninth lens is f33, and the focal length of the tenth lens is f34. Wherein, 0.94 ≤ f3 / f31 ≤ 1.27; and 4.35 ≤ f3 / f32 ≤ 5.88; and 0.80 ≤ f3 / f33 ≤ 1.08; and -0.55 ≤ f3 / f34 ≤ -0.41.

[0019] In one embodiment, the fourth lens group includes an eleventh lens with a positive focal power, a twelfth lens with a negative focal power, a thirteenth lens with a positive focal power, and a fourteenth lens with a negative focal power arranged in sequence along the optical axis direction.

[0020] Both the twelfth lens, the thirteenth lens, and the fourteenth lens are plastic lenses.

[0021] The focal length of the eleventh lens is f41, the focal length of the twelfth lens is f42, the focal length of the thirteenth lens is f43, and the focal length of the fourteenth lens is f44, where 0.72 ≤ f4 / f41 ≤ 0.98; and -0.40 ≤ f4 / f42 ≤ -0.30; and 1.66 ≤ f4 / f43 ≤ 2.25; and -0.04 ≤ f4 / f44 ≤ -0.03.

[0022] In one embodiment, the overall optical length of the zoom lens is TTL, and TTL < 50.80 mm.

[0023] In one embodiment, the target surface size of the zoom lens is φ, and φ = 9.2 mm.

[0024] In one embodiment, the aperture of the zoom lens is Fno, and 1.70 ≤ Fno ≤ 1.76.

[0025] In one embodiment, the zoom lens further includes a diaphragm and a filter. The diaphragm is disposed between the second lens group and the third lens group, and the filter is disposed on the image side of the fourth lens group.

[0026] In the technical solution provided by the present invention, the first lens group and the third lens group are fixed lens groups, the second lens group is movably disposed along the optical axis to zoom the zoom lens, and the fourth lens group moves cooperatively along the optical axis to focus the zoom lens, so that the imaging of the image plane remains clear during the zooming process of the zoom lens. Through conditional restrictions on the focal lengths of the four lens groups and the focal length of the wide-angle end of the zoom lens, and moreover, the lenses in multiple lens groups adopt a hybrid form of glass and plastic to provide a zoom lens with a wide field of view, small volume, low cost, and high resolution. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0028] Figure 1 It is a schematic structural diagram of an embodiment of the zoom lens provided by the present invention;

[0029] Figure 2 It is an FCD schematic diagram when the zoom lens is at the wide-angle end;

[0030] Figure 3 It is an FCD schematic diagram when the zoom lens is at the telephoto end;

[0031] Figure 4 Schematic diagram of LON when the zoom lens is at the wide-angle end;

[0032] Figure 5 Schematic diagram of LON when the zoom lens is at the telephoto end.

[0033] Explanation of the reference numerals in the drawings:

[0034] 100, zoom lens; 1, first lens group; 11, first lens; 12, second lens; 13, third lens; 2, second lens group; 21, fourth lens; 22, fifth lens; 23, sixth lens; 3, third lens group; 31, seventh lens; 32, eighth lens; 33, ninth lens; 34, tenth lens; 4, fourth lens group; 41, eleventh lens; 42, twelfth lens; 43, fourteenth lens; 5, diaphragm; 6, filter.

[0035] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0037] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] The present utility model provides an optical lens, aiming to solve the problems commonly existing in existing lenses, such as small aperture, which cannot meet the brightness requirements of images in low-illumination environments; the large image plane and small volume cannot be taken into account simultaneously, which cannot meet the space requirements of the lens; low resolution, for the mainstream 1080P lens, the resolution is 2 million, which can no longer meet the high-pixel requirements of face recognition; the infrared performance and high and low temperature performance cannot be taken into account simultaneously, and often the high and low temperature performance is sacrificed to meet the requirement of day and night confocal, etc.

[0040] Please refer to Figure 1 In an embodiment of the present utility model, the zoom lens 100 has an object side and an image side arranged corresponding to each other along the optical axis direction. The zoom lens 100 includes a first lens group 1, a second lens group 2, a third lens group 3, and a fourth lens group 4 arranged in sequence from the object side to the image side. The second lens group 2 and the fourth lens group 4 are both movably arranged along the optical axis direction. The second lens group 2 is used for zooming, and the fourth lens group 4 is used for focusing. Among them, the focal length of the zoom lens 100 at the wide-angle end is fw, the focal length of the first lens group 1 is f1, the focal length of the second lens group 2 is f2, the focal length of the third lens group 3 is f3, and the focal length of the fourth lens group 4 is f4. The zoom lens 100 satisfies the following conditions: 0.13 ≤ fw / f1 ≤ 0.45; and -1.50 ≤ fw / f2 ≤ -0.64; and 0.23 ≤ fw / f3 ≤ 0.75; and 0.25 ≤ fw / f4 ≤ 0.72.

[0041] In the technical solution provided by the present utility model, the first lens group 1 and the third lens group 3 are fixed lens groups, the second lens group 2 is movably arranged along the optical axis to zoom the zoom lens 100, and the fourth lens group 4 moves cooperatively along the optical axis to focus the zoom lens 100, so that the zoom lens 100 maintains clear imaging of the image plane during the zooming process. Through conditional restrictions on the focal lengths of the four lens groups and the focal length of the wide-angle end of the zoom lens 100, and moreover, the lenses in multiple lens groups adopt a form of glass-plastic hybrid to provide a zoom lens with a wide field of view, small volume, low cost, and high resolution.

[0042] It should be noted that the present utility model does not limit the specific driving form for driving the second lens group 2 and the fourth lens group 4 to move along the optical axis. In an embodiment of the present utility model, the driving force for the second lens group 2 and the fourth lens group 4 to move along the optical axis can be driven by a driving motor; in another embodiment of the present utility model, the driving force for the second lens group 2 and the fourth lens group 4 to move along the optical axis can also be manually adjusted. The present utility model does not make any restrictions here, and in actual settings, it can be selected according to requirements.

[0043] In addition, in the present utility model, the focal length of the zoom lens 100 is f, and 10.60 ≤ f ≤ 28.60.

[0044] In an embodiment of the present utility model, the optical power of the first lens group 1 is positive, the optical power of the second lens group 2 is negative, the optical power of the third lens group 3 is positive, and the optical power of the fourth lens group 4 is negative.

[0045] In a specific embodiment of the present utility model, the first lens group 1 includes a first lens 11 with a negative optical power, a second lens 12 with a positive optical power, and a third lens 13 with a positive optical power arranged in sequence along the optical axis. The focal length of the first lens 11 is f11, the focal length of the second lens 12 is f12, and the focal length of the third lens 13 is f13. Among them, -0.47 ≤ f1 / f11 ≤ -0.34; and 0.60 ≤ f1 / f12 ≤ 0.82; and 0.60 ≤ f1 / f13 ≤ 0.81.

[0046] It can be understood that the present utility model does not limit the specific numerical values of the focal lengths of the first lens 11, the second lens 12, and the third lens 13. In the embodiments of the present utility model, the first lens 11, the second lens 12, and the third lens 13 can be set to any value within the range.

[0047] Moreover, in this embodiment, the first lens 11 and the second lens 12 are adhesively connected. With such an arrangement, it is possible to better correct the chromatic aberration of the zoom lens 100. At the same time, the adhesive connection can also reduce light energy loss, increase imaging clarity, and protect the scale surface, thereby further optimizing the processing flow to meet the design requirements. Therefore, by reasonably using the adhesive parts, the optical components can improve the image quality of the optical system.

[0048] In another embodiment of the present invention, the second lens group 2 includes a fourth lens 21 with a negative optical power, a fifth lens 22 with a negative optical power, and a sixth lens 23 with a positive optical power arranged in sequence along the optical axis direction. The focal length of the fourth lens 21 is f21, the focal length of the fifth lens 22 is f22, and the focal length of the sixth lens 23 is f23. Among them, 0.75 ≤ f2 / f21 ≤ 1.02; and 0.41 ≤ f2 / f22 ≤ 0.56; and -0.49 ≤ f2 / f23 ≤ -0.36.

[0049] Similarly, in the present invention, the specific values of the focal lengths of the fourth lens 21, the fifth lens 22, and the sixth lens 23 can also be set to any value within the range, and the present invention does not limit this.

[0050] In this embodiment, both the fifth lens 22 and the sixth lens 23 are plastic lenses. Using plastic lenses can reduce the manufacturing cost of the zoom lens 100 to achieve the low-cost effect of the zoom lens 100.

[0051] In yet another embodiment of the present invention, the third lens group 3 includes a seventh lens 31 with a positive optical power, an eighth lens 32 with a positive optical power, a ninth lens 33 with a positive optical power, and a tenth lens 34 with a positive optical power arranged in sequence along the optical axis direction. The ninth lens 33 and the tenth lens 34 are adhesively connected. The focal length of the seventh lens 31 is f31, the focal length of the eighth lens 32 is f32, the focal length of the ninth lens 33 is f33, and the focal length of the tenth lens 34 is f34. Among them, 0.94 ≤ f3 / f31 ≤ 1.27; and 4.35 ≤ f3 / f32 ≤ 5.88; and 0.80 ≤ f3 / f33 ≤ 1.08; and -0.55 ≤ f3 / f34 ≤ -0.41.

[0052] Of course, in the present invention, the specific values of the focal lengths of the seventh lens 31, the eighth lens 32, the ninth lens 33, and the tenth lens 34 only need to be selected as any value within the range, and the present invention does not limit this.

[0053] At the same time, in this embodiment, the eighth lens 32 is also set as a plastic lens to further reduce the support cost of the zoom lens 100.

[0054] In addition, in this embodiment, the ninth lens 33 and the tenth lens 34 are adhesively connected to further reduce light energy loss, increase imaging clarity, protect the scale surface, and optimize the processing flow to meet the design requirements.

[0055] In yet another embodiment of the present invention, the fourth lens group 4 includes an eleventh lens 41 with a positive optical power, a twelfth lens 42 with a negative optical power, a thirteenth lens with a positive optical power, and a fourteenth lens 43 with a negative optical power arranged in sequence along the optical axis direction. The focal length of the eleventh lens 41 is f41, the focal length of the twelfth lens 42 is f42, the focal length of the thirteenth lens is f43, and the focal length of the fourteenth lens 43 is f44. Among them, 0.72 ≤ f4 / f41 ≤ 0.98; and -0.40 ≤ f4 / f42 ≤ -0.30; and 1.66 ≤ f4 / f43 ≤ 2.25; and -0.04 ≤ f4 / f44 ≤ -0.03.

[0056] Similarly, specific values of the focal lengths of the eleventh lens 41, the twelfth lens 42, the thirteenth lens, and the fourteenth lens 43 can be arbitrarily selected within their respective ranges, and the present invention does not limit this.

[0057] It should be noted that in this embodiment, the twelfth lens 42, the thirteenth lens, and the fourteenth lens 43 are all plastic lenses. This is set to significantly reduce the manufacturing cost of the zoom lens 100, thereby ensuring the low-cost characteristic of the zoom lens 100.

[0058] Furthermore, in an embodiment of the present invention, the zoom lens 100 further includes a diaphragm 5 and a filter 6. The diaphragm 5 is disposed between the second lens group 2 and the third lens group 3, and the filter 6 is disposed on the image side of the fourth lens group 4. The diaphragm 5 is used to adjust the light flux according to the actual situation and improve the imaging quality.

[0059] In addition, in the above embodiment, the first lens 11, the second lens 12, the third lens 13, the fourth lens 21, the seventh lens 31, the ninth lens 33, the tenth lens 34, and the eleventh lens 41 are all glass lenses. This is set so that using lenses made of glass can reduce the influence of temperature on the optical performance of the lens. Glass lenses are not easily affected by thermal expansion and contraction and do not have a focus shift phenomenon. Therefore, glass lenses can well resist the problem of lens deformation due to heat and maintain the high precision of the lens for a long time. The setting of the filter 6 can effectively filter out stray light in non-working wavelength bands to reduce optical noise and make it easier for the subsequent optoelectronic module processing part, thereby improving the imaging quality.

[0060] Specifically, in a specific embodiment, the refractive index of the lens material, the Abbe number of the material, the curvature radius, and the thickness interval of the lens in this embodiment are shown in Table 1 below:

[0061] Table 1

[0062]

[0063]

[0064] It can be understood that in this embodiment, the fifth lens 22, the sixth lens 23, the eighth lens 32, the twelfth lens 42, the thirteenth lens, and the fourteenth lens 43 are all aspherical lenses. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality of the lens.

[0065] Correspondingly, in this embodiment, the first lens 11, the second lens 12, the third lens 13, the fourth lens 21, the seventh lens 31, the ninth lens 33, the tenth lens 34, and the eleventh lens 41 are all spherical lenses. With this setting, using spherical lenses can reduce costs while ensuring image quality and reliability, with lower assembly sensitivity and improved finished product yield.

[0066] Furthermore, in this embodiment, the aspherical surface shape of the aspherical lens satisfies the following conditions:

[0067]

[0068] Among them, c is the curvature corresponding to the radius, y is the radial coordinate (whose unit is the same as the lens length unit), k is the conic quadratic curve coefficient (when the k coefficient is less than -1, the surface shape curve is a hyperbola; when the k coefficient is equal to -1, it is a parabola; when the k coefficient is between -1 and 0, it is an ellipse; when the k coefficient is equal to 0, it is a circle; when the k coefficient is greater than 0, it is an oblate circle), and A, B, C, D, E, F, G, and H are high-order aspherical coefficients (please refer to Table 2 below). The shape and size of the aspherical surfaces on the object side and image side of the lens can be set through the above parameters.

[0069] Table 2 Conic coefficients and aspherical coefficients corresponding to aspherical lenses

[0070]

[0071] With such settings, by reasonably distributing the lens focal power, adjusting the glass shape and material combination, chromatic aberration and secondary spectrum are effectively eliminated, and spherical aberration, coma, astigmatism, etc. on each lens are compensated and offset from each other to achieve a clear imaging effect and realize the optimal correction of higher-order aberration and chromatic aberration.

[0072] In this embodiment, the overall optical length of the zoom lens 100 is TTL, and TTL < 50.80 mm. In this way, the small-size performance of the zoom lens 100 can be achieved.

[0073] In addition, in this embodiment, the target surface size of the zoom lens 100 is φ, and φ = 9.2 mm.

[0074] It should be further noted that in this embodiment, the aperture of the zoom lens 100 is Fno, and 1.70 ≤ Fno ≤ 1.76. In this way, the zoom lens 100 has the characteristic of a large aperture, enabling the zoom lens 100 to still have excellent imaging effects in a low-illumination environment, meeting the imaging requirements in bright and dark environments, and realizing the night vision function.

[0075] In addition, the intervals that change between each lens group of the zoom lens 100 from the Wide end (wide-angle end) to the Tele end (telephoto end) in this embodiment are as follows:

[0076] Table 3

[0077]

[0078]

[0079] The above description is only an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A zoom lens, characterized in that: The zoom lens has an object side and an image side correspondingly arranged along the optical axis direction, and comprises a first lens group, a second lens group, a third lens group, and a fourth lens group arranged in sequence from the object side to the image side, the second lens group and the fourth lens group are both movably arranged along the optical axis direction, the second lens group is used for zooming, and the fourth lens group is used for focusing; The focal length of the zoom lens at the wide-angle end is fw, the focal length of the first lens group is f1, the focal length of the second lens group is f2, the focal length of the third lens group is f3, and the focal length of the fourth lens group is f4. The zoom lens meets the following conditions: 0.13≤fw / f1≤0.45; and -1.50≤fw / f2≤-0.64; and 0.23≤fw / f3≤0.75; and 0.25≤fw / f4≤0.

72.

2. The zoom lens according to claim 1, wherein: The optical power of the first lens group is positive; The optical power of the second lens group is negative; The optical power of the third lens group is positive; The optical power of the fourth lens group is negative.

3. The zoom lens according to claim 1, wherein: The first lens group comprises a first lens with negative optical power, a second lens with positive optical power and a third lens with positive optical power, which are sequentially arranged along the optical axis direction, and the first lens and the second lens are glued together; The focal length of the first lens is f11, the focal length of the second lens is f12, and the focal length of the third lens is f13, wherein -0.47≤f1 / f11≤-0.34; and 0.60≤f1 / f12≤0.82; and 0.60≤f1 / f13≤0.

81.

4. The zoom lens according to claim 1, wherein: The second lens group includes a fourth lens with negative optical power, a fifth lens with negative optical power, and a sixth lens with positive optical power, which are sequentially arranged along the optical axis direction; The fifth lens and the sixth lens are both plastic lenses; The focal length of the fourth lens is f21, the focal length of the fifth lens is f22, and the focal length of the sixth lens is f23, wherein 0.75≤f2 / f21≤1.02; and 0.41≤f2 / f22≤0.56; and -0.49≤f2 / f23≤-0.

36.

5. The zoom lens according to claim 1, wherein: The third lens group comprises a seventh lens with positive optical power, an eighth lens with positive optical power, a ninth lens with positive optical power and a tenth lens with positive optical power, which are sequentially arranged along the optical axis, and the ninth lens and the tenth lens are glued together; The eighth lens is a plastic lens; The focal length of the seventh lens is f31, the focal length of the eighth lens is f32, the focal length of the ninth lens is f33, and the focal length of the tenth lens is f34, wherein 0.94≤f3 / f31≤1.27; and 4.35≤f3 / f32≤5.88; and 0.80≤f3 / f33≤1.08; and -0.55≤f3 / f34≤-0.

41.

6. The zoom lens according to claim 1, wherein: The fourth lens group includes an eleventh lens with positive focal power, a twelfth lens with negative focal power, a thirteenth lens with positive focal power and a fourteenth lens with negative focal power, which are sequentially arranged along the optical axis direction; The twelfth lens, the thirteenth lens and the fourteenth lens are all plastic lenses; The focal length of the eleventh lens is f41, the focal length of the twelfth lens is f42, the focal length of the thirteenth lens is f43, and the focal length of the fourteenth lens is f44, wherein 0.72≤f4 / f41≤0.98; and -0.40≤f4 / f42≤-0.30; and 1.66≤f4 / f43≤2.25; and -0.04≤f4 / f44≤-0.

03.

7. The zoom lens according to claim 1, wherein: The total optical length of the zoom lens is TTL, TTL<50.80 mm.

8. The zoom lens according to claim 1, wherein: The target surface size of the zoom lens is φ, φ=9.2 mm.

9. The zoom lens according to claim 1, wherein: The aperture of the zoom lens is Fno, 1.70≤Fno≤1.

76.

10. The zoom lens according to claim 1, wherein: The zoom lens further comprises an aperture and a filter, wherein the aperture is arranged between the second lens group and the third lens group, and the filter is arranged on a side of the fourth lens group facing the image side.

Images