Zoom lens and electronic device

Abstract

The utility model discloses a zoom lens and electronic equipment, zoom lens includes lens barrel and sets up in the lens group of lens barrel, the zoom lens satisfies following relation expression: 0.45<(L*IH) / TAN(FOV)<0.85 Wherein, L: the length of lens barrel, IH: imaging surface on sensor effective pixel area diagonal line long half, FOV: optical system maximum field of view angle, 1.76<2*D0ow / D0iw<1.9 Wherein, D0ow: lens barrel object side outer diameter, D0iw: lens barrel image side outer diameter. When satisfying the first relation expression, when the size (target surface) of image sensor and field of view angle are in a certain range, the imaging quality is good, the visual angle range is big, and the length of optical lens can be effectively limited, thereby reducing the volume of camera module, guaranteeing that optical lens realizes miniaturization, the second relation expression can effectively control the size of lens head through the control lens barrel image side outer diameter and lens barrel object side outer diameter ratio, simultaneously control the wall thickness of lens barrel image side, thereby guaranteeing that lens barrel has certain intensity.

Description

Technical Field

[0001] This utility model relates to the field of camera technology, and more specifically, to a zoom lens and an electronic device. Background Technology

[0002] In recent years, with the continuous advancement and development of optical lens technology, most users tend to use the photography functions of smartphones and smart wearables instead of traditional cameras. However, mainstream camera modules are bulky, and to achieve multi-zoom, multiple lenses often need to work together, resulting in the camera module occupying a large amount of internal space in the device and affecting the design of thinner and lighter electronic devices. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to effectively limit the length of the optical lens and the size of the lens head, thereby reducing the size of the camera module, ensuring the miniaturization of the zoom lens, and at the same time controlling the wall thickness of the lens barrel on the image side, thereby ensuring that the lens barrel has a certain strength.

[0004] The technical problem to be solved by this utility model is achieved through the following technical solution:

[0005] To solve the above-mentioned technical problems, this utility model provides a zoom lens, which includes a lens barrel and a lens group disposed within the lens barrel. The lens group includes a TLENS module, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are arranged sequentially from the object side to the image side along the optical axis. The outer diameters of the first, second, third, fourth, and fifth lenses increase sequentially. A first light-transmitting element, a second light-transmitting element, a third light-transmitting element, and a fourth light-transmitting element are disposed within the lens barrel. The first light-transmitting element is located between the first and second lenses and contacts the image-side surface of the first lens. The second light-transmitting element is located between the second and third lenses and contacts the image-side surface of the second lens. The third light-transmitting element is located between the third and fourth lenses and contacts the image-side surface of the third lens. The fourth light-transmitting element is located between the fourth and fifth lenses and in contact with the image-side side of the fourth lens. The curvature of the TLENS module is adjustable, and an aperture stop STO is provided between the TLENS module and the first lens. The first lens has positive refractive power, is convex on the object-side near the optical axis, and concave on the image-side. The second lens has positive refractive power, is either convex or concave on the object-side near the optical axis, and is convex on the image-side. The third lens has negative refractive power, is concave on the object-side near the optical axis, and is either convex or concave on the image-side. The fourth lens has positive refractive power, is either convex or concave on the object-side near the optical axis, and is convex on the image-side. The fifth lens has negative refractive power, is convex on the object-side near the optical axis, and is concave on the image-side. The zoom lens satisfies the following relationship:

[0006] 0.45 < (L*IH) / TAN(FOV) < 0.85

[0007] in,

[0008] L: Length of the lens barrel;

[0009] IH: Half the diagonal length of the effective pixel area of ​​the sensor on the imaging surface;

[0010] FOV: Maximum field of view of the optical system;

[0011] 1.76 < 2 * D0ow / D0iw < 1.9

[0012] in,

[0013] D0ow: Outer diameter of the microscope tube on the object side;

[0014] D0iw: Image-side outer diameter of the lens tube.

[0015] As a preferred embodiment of the zoom lens provided by this utility model, it satisfies the following relationship:

[0016] -1.25 <SAG31 / CT3<-0.55

[0017] in,

[0018] SAG31: Sagitta of the third lens object's side surface;

[0019] CT3: Center thickness of the third lens.

[0020] As a preferred embodiment of the zoom lens provided by this utility model, it satisfies the following relationship:

[0021] 0.015 <EFL*LE02 / f2<1

[0022] in,

[0023] EFL: Effective focal length of an optical camera lens;

[0024] LE02: The distance along the optical axis from the side of the lens barrel to the side of the second light-transmitting element;

[0025] f2: Focal length of the second lens element.

[0026] As a preferred embodiment of the zoom lens provided by this utility model, it satisfies the following relationship:

[0027] 1.3 <EPD*IH / FNO<1.7

[0028] in,

[0029] EPD: Entrance pupil diameter of the optical system;

[0030] IH: Half the diagonal length of the effective pixel area of ​​the sensor on the imaging surface;

[0031] FNO: The F-number of an optical lens.

[0032] As a preferred embodiment of the zoom lens provided by this utility model, it satisfies the following relationship:

[0033] -0.5<(R31*R32) / ((R51*R52)*R22)<4.7

[0034] -23.8 <R11*R22<-4.1

[0035] -24.1<(R32*R21) / (R32+R21)<-1.8

[0036] -2.6 <R12 / R22<-0.5

[0037] -1.5 <R41 / (R41*R42)<-0.45

[0038] in,

[0039] R11: Radius of curvature of the side surface of the first lens;

[0040] R12: Radius of curvature of the side of the first lens image;

[0041] R21: Radius of curvature of the side surface of the second lens object;

[0042] R22: Radius of curvature of the image side of the second lens;

[0043] R31: Radius of curvature of the side surface of the third mirror object;

[0044] R32: Radius of curvature of the side of the third lens image;

[0045] R41: Radius of curvature of the side surface of the fourth lens object;

[0046] R42: Radius of curvature of the side of the fourth lens image;

[0047] R51: Radius of curvature of the side surface of the fifth lens;

[0048] R52: Radius of curvature of the side of the fifth lens image.

[0049] As a preferred embodiment of the zoom lens provided by this utility model, it satisfies the following relationship:

[0050] 0.15 <V2 / V3-V2 / V5<1.3

[0051] 0.7 <IN2*10 / V3<0.9

[0052] 0.4 <IN3*10 / V5<0.9

[0053] in,

[0054] IN2: Refractive index of the second lens;

[0055] V2: Abbe number of the second lens;

[0056] IN3: Refractive index of the third lens;

[0057] V3: Abbe number of the third lens;

[0058] V5: Abbe number of the fifth lens.

[0059] As a preferred embodiment of the zoom lens provided by this utility model, it satisfies the following relationship:

[0060] 0.06<((f1 / f2)*EFL)*100 / ((L345+BFL)*TAN(FOV))<6.6

[0061] in,

[0062] f1: Focal length of the first lens element;

[0063] f2: Focal length of the second lens element;

[0064] EFL: Effective focal length of an optical camera lens;

[0065] L345: The distance on the optical axis from the image side surface of the second light-transmitting element to the image side surface end face of the lens barrel;

[0066] BFL: Optical back focal length of a camera lens;

[0067] FOV: Maximum field of view of the optical system.

[0068] As a preferred embodiment of the zoom lens provided by this utility model, it satisfies the following relationship:

[0069] 0.22<((D1+D2+D3)-(D4+D5)) / TTL<0.44

[0070] in,

[0071] D1: Diameter of the first lens;

[0072] D2: Diameter of the second lens;

[0073] D3: Diameter of the third lens;

[0074] D4: Diameter of the fourth lens;

[0075] D5: Diameter of the fifth lens;

[0076] TTL: The distance on the optical axis from the object side of the first lens to the imaging surface of the optical system.

[0077] As a preferred embodiment of the zoom lens provided by this utility model, it satisfies the following relationship:

[0078] -1.2<(D2o+D2i) / f2-f1 / (D1o+D1i)<-0.4

[0079] -0.6<(f3+f4+f5) / (D5o+D4o+D4i+D3o+D3i)<-0.2

[0080] in,

[0081] D2o: Inner diameter of the image side of the second lens;

[0082] D2i: Inner diameter of the second lens object side surface;

[0083] f2: Focal length of the second lens element;

[0084] f1: Focal length of the first lens element;

[0085] D1o: Inner diameter of the side view of the first lens;

[0086] D1i: Inner diameter of the first lens object side surface;

[0087] f3: Focal length of the third lens element;

[0088] f4: Focal length of the fourth lens element;

[0089] f5: Focal length of the fifth lens element;

[0090] D5o: Inner diameter of the image side of the fifth lens;

[0091] D4o: Inner diameter of the image side of the fourth lens;

[0092] D4i: Inner diameter of the fourth lens object's side surface;

[0093] D3o: Inner diameter of the image side of the third lens;

[0094] D3i: Inner diameter of the third lens object side.

[0095] This invention provides an electronic device comprising a zoom lens as described in any of the preceding claims, wherein the zoom lens further comprises an imaging element for converting the optical image formed by the zoom lens into an electrical signal.

[0096] This utility model has the following beneficial effects:

[0097] When the first relation is satisfied, the image quality is good and the field of view is wide when the size of the image sensor (target surface) and the field of view are within a certain range. It can also effectively limit the length of the optical lens, thereby reducing the size of the camera module and ensuring that the optical lens is miniaturized. The second relation can effectively control the size of the lens head by controlling the ratio of the outer diameter of the image side of the lens barrel to the outer diameter of the object side of the lens barrel. At the same time, it can control the wall thickness of the image side of the lens barrel, thereby ensuring that the lens barrel has a certain strength. Attached Figure Description

[0098] To more clearly illustrate the solutions in this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0099] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of a zoom lens provided by this utility model.

[0100] Figure 2 This is a performance diagram of Example 1 at infinity.

[0101] Figure 3 This is a distortion curve diagram of Example 1.

[0102] Figure 4 This is the color difference diagram for Example 1.

[0103] Figure 5 The graph shows the performance of Example 1 at an object distance of 450.

[0104] Figure 6 The graph shows the performance of Example 1 at a low temperature of -30 degrees Celsius.

[0105] Figure 7 The graph shows the performance of Example 1 at a high temperature of 70 degrees Celsius.

[0106] Figure 8 This is a schematic diagram of the structure of a second embodiment of a zoom lens provided by this utility model.

[0107] Figure 9 This is a performance graph of Example 2 at infinity.

[0108] Figure 10 This is a distortion curve diagram of Example 2.

[0109] Figure 11 This is the color difference diagram for Example 2.

[0110] Figure 12This is a performance graph of Example 2 at an object distance of 450.

[0111] Figure 13 The graph shows the performance of Example 2 at a low temperature of -30 degrees Celsius.

[0112] Figure 14 The graph shows the performance of Example 2 at a high temperature of 70 degrees Celsius.

[0113] Figure 15 This is a schematic diagram of the structure of a zoom lens according to Embodiment 3 of the present invention.

[0114] Figure 16 This is a performance graph of Example 3 at infinity.

[0115] Figure 17 This is a distortion curve diagram of Example 3.

[0116] Figure 18 This is the color difference diagram for Example 3.

[0117] Figure 19 This is a performance graph of Example 3 at an object distance of 450.

[0118] Figure 20 The graph shows the performance of Example 3 at a low temperature of -30 degrees Celsius.

[0119] Figure 21 The graph shows the performance of Example 3 at a high temperature of 70 degrees Celsius.

[0120] Explanation of icon numbers:

[0121] Lens barrel 1; TLENS module 2; First lens P1; Second lens P2; Third lens P3; Fourth lens P4; Fifth lens P5; First aperture element S1; Second aperture element S2; Third aperture element S3; Fourth aperture element S4; Aperture stop STO3;

[0122] 2mm stop21; Flat window22; Polymer23; Membrane24. Detailed Implementation

[0123] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0124] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0125] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0126] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. The present invention will be described in detail below with reference to the accompanying drawings and embodiments, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0127] This utility model provides a zoom lens, comprising a lens barrel and a lens assembly disposed within the lens barrel. The lens assembly includes a TLENS module, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, arranged sequentially from the object side to the image side along the optical axis. The outer diameters of the first, second, third, fourth, and fifth lenses increase sequentially. A first light-transmitting element, a second light-transmitting element, a third light-transmitting element, and a fourth light-transmitting element are disposed within the lens barrel. The first light-transmitting element is located between the first and second lenses and contacts the image-side surface of the first lens. The second light-transmitting element is located between the second and third lenses and contacts the image-side surface of the second lens. The third light-transmitting element is located between the third and fourth lenses and contacts the image-side surface of the third lens. The fourth light-transmitting element is located between the fourth and fifth lenses and in contact with the image-side surface of the fourth lens. The curvature of the TLENS module is adjustable, and an aperture stop STO is provided between the TLENS module and the first lens. The first lens has positive refractive power, is convex on the object-side surface near the optical axis, and concave on the image-side surface. The second lens has positive refractive power, is either convex or concave on the object-side surface near the optical axis, and is convex on the image-side surface. The third lens has negative refractive power, is concave on the object-side surface near the optical axis, and is either convex or concave on the image-side surface. The fourth lens has positive refractive power, is either convex or concave on the object-side surface near the optical axis, and is convex on the image-side surface. The fifth lens has negative refractive power, is convex on the object-side surface near the optical axis, and is concave on the image-side surface. The zoom lens satisfies the following relationship:

[0128] 0.45 < (L*IH) / TAN(FOV) < 0.85

[0129] in,

[0130] L: Length of the lens barrel;

[0131] IH: Half the diagonal length of the effective pixel area of ​​the sensor on the imaging surface;

[0132] FOV: Maximum field of view of the optical system;

[0133] 1.76 < 2 * D0ow / D0iw < 1.9

[0134] in,

[0135] D0ow: Outer diameter of the microscope tube on the object side;

[0136] D0iw: Image-side outer diameter of the lens tube.

[0137] When the first relation is satisfied, the image quality is good and the field of view is wide when the size of the image sensor (target surface) and the field of view are within a certain range. It can also effectively limit the length of the optical lens, thereby reducing the size of the camera module and ensuring that the optical lens is miniaturized. The second relation can effectively control the size of the lens head by controlling the ratio of the outer diameter of the image side of the lens barrel to the outer diameter of the object side of the lens barrel. At the same time, it can control the wall thickness of the image side of the lens barrel, thereby ensuring that the lens barrel has a certain strength.

[0138] Furthermore, zoom lenses satisfy the following relationship:

[0139] -1.25 <SAG31 / CT3<-0.55

[0140] in,

[0141] SAG31: Sagitta of the third lens object's side surface;

[0142] CT3: Center thickness of the third lens;

[0143] By controlling the ratio of the sag of the third lens P3 object side at the maximum aperture to the center thickness of the third lens P3, the curvature design of the lens surface can be optimized, adapting to standardized processing technology, reducing the difficulty of lens forming, improving processing accuracy and efficiency, and reducing processing defects. At the same time, a reasonable ratio of sag to center thickness can ensure the stability of the lens structure, adapt to the lens assembly positioning benchmark, reduce alignment deviation during assembly, reduce the risk of assembly error, effectively improve the overall assembly yield of the lens, and ensure product consistency and optical performance stability during mass production.

[0144] Furthermore, it satisfies the following relationship:

[0145] 0.015 <EFL*LE02 / f2<1

[0146] in,

[0147] EFL: Effective focal length of an optical camera lens;

[0148] LE02: The distance along the optical axis from the side of the lens barrel to the side of the second light-transmitting element;

[0149] f2: Focal length of the second lens element;

[0150] By controlling the ratio of the effective focal length of the optical camera lens to the product of the distance on the optical axis from the object side of the lens barrel 1 to the object side of the second light-transmitting aperture element S2, and the focal length of the second lens P2, the axial layout of the optical structure at the front end of the lens can be ensured, the space occupied by the assembly of the head optical elements and the lens barrel can be reasonably compressed, the head size of the optical lens can be controlled, and the head miniaturization requirements can be met. At the same time, this parameter ratio can ensure the adaptability of the front optical path and achieve a compact design of the optical lens head while taking into account high imaging performance.

[0151] Furthermore, zoom lenses satisfy the following relationship:

[0152] 1.3 <EPD*IH / FNO<1.7

[0153] in,

[0154] EPD: Entrance pupil diameter of the optical system;

[0155] IH: Half the diagonal length of the effective pixel area of ​​the sensor on the imaging surface;

[0156] FNO: The F-number of an optical lens;

[0157] When the above conditions are met, the light intake efficiency of the optical system can be optimized. Sufficient light intake can effectively reduce imaging noise caused by insufficient light in low-light environments and improve image purity. At the same time, it is suitable for light intake adjustment needs in different light flux scenarios. Whether in strong light or low light environments, it can ensure stable imaging and reasonably constrain the imaging surface size, comprehensively improving imaging clarity, contrast and detail reproduction, and ensuring high-quality imaging effects.

[0158] Furthermore, zoom lenses satisfy the following relationship:

[0159] -0.5<(R31*R32) / ((R51*R52)*R22)<4.7

[0160] -23.8 <R11*R22<-4.1

[0161] -24.1<(R32*R21) / (R32+R21)<-1.8

[0162] -2.6 <R12 / R22<-0.5

[0163] -1.5 <R41 / (R41*R42)<-0.45

[0164] in,

[0165] R11: Radius of curvature of the side surface of the first lens;

[0166] R12: Radius of curvature of the side of the first lens image;

[0167] R21: Radius of curvature of the side surface of the second lens object;

[0168] R22: Radius of curvature of the image side of the second lens;

[0169] R31: Radius of curvature of the side surface of the third mirror object;

[0170] R32: Radius of curvature of the side of the third lens image;

[0171] R41: Radius of curvature of the side surface of the fourth lens object;

[0172] R42: Radius of curvature of the side of the fourth lens image;

[0173] R51: Radius of curvature of the side surface of the fifth lens;

[0174] R52: Radius of curvature of the image side of the fifth lens;

[0175] By coordinating the curvature radii of the lenses with specific relationships, the curvature of the object side of the first lens P1 to the image side of the fifth lens P5 can be effectively controlled, effectively avoiding the aberration problem caused by excessive curvature of a single lens surface. At the same time, the spherical aberration of the optical system is efficiently corrected, greatly reducing the impact of spherical aberration on image sharpness and image accuracy. Furthermore, the scientific curvature radius ratio makes the shape of each lens smoother and more uniform, adapts to standardized processing procedures, improves the lens processing qualification rate, and improves the overall lens assembly yield.

[0176] Furthermore, zoom lenses satisfy the following relationship:

[0177] 0.15 <V2 / V3-V2 / V5<1.3

[0178] 0.7 <IN2*10 / V3<0.9

[0179] 0.4 <IN3*10 / V5<0.9

[0180] in,

[0181] IN2: Refractive index of the second lens;

[0182] V2: Abbe number of the second lens;

[0183] IN3: Refractive index of the third lens;

[0184] V3: Abbe number of the third lens;

[0185] V5: Abbe number of the fifth lens;

[0186] When the above conditions are met, the optical system achieves a scientific combination of high-refractive-index and low-refractive-index lenses, effectively reducing the impact of temperature changes on the light refraction path under complex environments such as high and low temperatures, ensuring the stability of imaging parameters of the optical system in different temperature ranges, and achieving efficient and stable operation over a wide temperature range; at the same time, it can precisely adjust the propagation deviation of different wavelengths of light during refraction, suppress color aberration problems such as color misalignment and diffused color stripes at the edge of the image, efficiently complete color aberration correction, and improve the color reproduction and image clarity of the entire image.

[0187] Furthermore, zoom lenses satisfy the following relationship:

[0188] 0.06<((f1 / f2)*EFL)*100 / ((L345+BFL)*TAN(FOV))<6.6

[0189] in,

[0190] f1: Focal length of the first lens element;

[0191] f2: Focal length of the second lens element;

[0192] EFL: Effective focal length of an optical camera lens;

[0193] L345: The distance on the optical axis from the image side surface of the second light-transmitting element to the image side surface end face of the lens barrel;

[0194] BFL: Optical back focal length of a camera lens;

[0195] FOV: Maximum field of view of the optical system;

[0196] The formulas with specific relationships described above can control the refraction angle of light rays at the edge of the optical lens, effectively suppressing distortion problems such as stretching and compression in edge imaging, ensuring that the distortion of the full field of view imaging is at a low level, achieving a clear and regular imaging effect, and achieving the goal of low distortion gain. At the same time, this parameter ratio can scientifically optimize the spatial layout of the internal optical elements and lens barrel, accurately control the axial and radial dimensions of the lens, meet the miniaturization design requirements of optical lenses, reserve sufficient space for the assembly and positioning of optical elements, and provide reasonable margin for the focusing mechanism, avoiding the risk of interference between optical elements and lens barrel and focusing structure, and ensuring stable optical performance of the lens and smooth operation of the mechanism.

[0197] Furthermore, zoom lenses satisfy the following relationship:

[0198] 0.22<((D1+D2+D3)-(D4+D5)) / TTL<0.44

[0199] in,

[0200] D1: Diameter of the first lens;

[0201] D2: Diameter of the second lens;

[0202] D3: Diameter of the third lens;

[0203] D4: Diameter of the fourth lens;

[0204] D5: Diameter of the fifth lens;

[0205] TTL: The distance on the optical axis from the object side of the first lens to the imaging surface of the optical system;

[0206] Meeting the above conditions ensures that the light transmission path is aligned during assembly, avoiding assembly deviations caused by aperture misalignment, guaranteeing the direction of light within the lens barrel 1, reducing system sensitivity, and improving overall lens assembly efficiency and quality. Furthermore, it facilitates lens molding, avoids redundant aperture design, reduces lens material usage, simplifies mold structure (eliminating the need for complex cavity adaptations to different aperture diameters), and lowers mold manufacturing and lens processing costs.

[0207] Furthermore, zoom lenses satisfy the following relationship:

[0208] -1.2<(D2o+D2i) / f2-f1 / (D1o+D1i)<-0.4

[0209] -0.6<(f3+f4+f5) / (D5o+D4o+D4i+D3o+D3i)<-0.2

[0210] in,

[0211] D2o: Inner diameter of the image side of the second lens;

[0212] D2i: Inner diameter of the second lens object side surface;

[0213] f2: Focal length of the second lens element;

[0214] f1: Focal length of the first lens element;

[0215] D1o: Inner diameter of the side view of the first lens;

[0216] D1i: Inner diameter of the first lens object side surface;

[0217] f3: Focal length of the third lens element;

[0218] f4: Focal length of the fourth lens element;

[0219] f5: Focal length of the fifth lens element;

[0220] D5o: Inner diameter of the image side of the fifth lens;

[0221] D4o: Inner diameter of the image side of the fourth lens;

[0222] D4i: Inner diameter of the fourth lens object's side surface;

[0223] D3o: Inner diameter of the image side of the third lens;

[0224] D3i: Inner diameter of the side surface of the third lens;

[0225] By controlling the difference between the focal length-to-diameter ratio of the second lens and that of the first lens, the refraction of light passing through the first two lenses can be matched, avoiding aberrations caused by light spillage or congestion due to an imbalance between the amount of light entering the first lens and the amount received by the second lens. When the difference exceeds a certain range, it can easily lead to blurred images and reduced edge resolution. By controlling the ratio of the sum of the focal lengths to the sum of the diameters of the last three lenses, the secondary correction and focusing efficiency of the last three lenses for the light from the first group can be guaranteed. An imbalance in the ratio will lead to image distortion, increased chromatic aberration, and redundant aperture will increase the lens volume. By constraining these two sets of formulas with specific relationships, a continuous and balanced light transmission path can be constructed, which not only helps the optical lens achieve optimal performance but also facilitates the lens molding process.

[0226] Furthermore, zoom lenses satisfy the following relationship:

[0227] 0.47<(LE4+CT1+CT2+CT3+CT4) / DE4<0.52

[0228] in,

[0229] LE4: Thickness of the fourth light-transmitting aperture element;

[0230] CT1: Center thickness of the first lens;

[0231] CT2: Center thickness of the second lens;

[0232] CT3: Center thickness of the second lens;

[0233] CT4: Center thickness of the fourth lens;

[0234] DE4: Diameter of the fourth light-transmitting aperture element;

[0235] When the above conditions are met, the strength of the lens can be guaranteed while avoiding the impact of excessive thinness at the center of the lens on its forming, thereby improving the stability of the entire optical lens. In addition, the internal space of the lens barrel 1 can be reasonably allocated, the effective total length of the lens group can be controlled within a reasonable range, and the maximum thickness and diameter of the fourth light-passing aperture element S4 can be reasonably configured to ensure the assembly strength of the optical lens and avoid the risk of deformation due to baking.

[0236] This five-element plastic aspherical lens, by employing reasonable power and surface shape, and allocating parameters in combination with the TLENS module 2, achieves zoom by changing the curvature of the thin film material in the TLENS module 2 within the object distance range of 150mm to infinity. The optimal performance is achieved within the object distance range of 450mm to infinity.

[0237] This five-element plastic aspherical lens, through the use of reasonable optical power and surface shape, and the allocation of parameters, is paired with the TLENS module 2, and has the advantages of miniaturization, fast focusing speed, and low power consumption.

[0238] The five-element plastic aspherical lens is paired with a TLENS module 2, which consists of, from the object side to the image side, a 2mm stop 21 (circular light-transmitting element), a flat window 22 (encapsulating glass), a polymer 23 (polymer), and a membrane 24 (thin-film structure). The 2mm stop 21 has a diameter of 2mm and a thickness of 0.03mm; the flat window 22 is made of AF32ECO material and has a thickness of 0.1mm; the polymer 23 has a thickness of 0.28mm, a refractive index of 1.55, and an Abbe number of 30.8; the membrane 24 has a thickness of 0.02mm, a refractive index of 1.53, and an Abbe number of 65.4; the distance between the five-element lens and the TLENS module 2 is 0.15mm.

[0239] Example 1

[0240] Please see Figure 1 This embodiment provides a zoom lens, which includes a lens barrel 1 and a lens group disposed within the lens barrel 1. The lens group includes a TLENS module 2, a first lens P1, a second lens P2, a third lens P3, a fourth lens P4, and a fifth lens P5, which are arranged sequentially from the object side to the image side along the optical axis. The outer diameters of the first lens P1, second lens P2, third lens P3, fourth lens P4, and fifth lens P5 increase sequentially. A first light-transmitting element S1, a second light-transmitting element S2, a third light-transmitting element S3, and a fourth light-transmitting element S4 are disposed within the lens barrel 1. The first light-transmitting element S1... The first lens P1 and the second lens P2 are located between the first lens P1 and the second lens P2 and are in contact with the image side of the first lens P1. The second light-transmitting aperture element S2 is located between the second lens P2 and the third lens P3 and is in contact with the image side of the second lens P2. The third light-transmitting aperture element S3 is located between the third lens P3 and the fourth lens P4 and is in contact with the image side of the third lens P3. The fourth light-transmitting aperture element S4 is located between the fourth lens P4 and the fifth lens P5 and is in contact with the image side of the fourth lens P4. The curvature of the TLENS module 2 is adjustable. An aperture stop STO3 is provided between the TLENS module 2 and the first lens P1.

[0241] The first lens P1 has positive refractive power, and it is convex on the object side near the optical axis and concave on the image side.

[0242] The second lens P2 has positive refractive power, and it is convex on the object side near the optical axis and on the image side.

[0243] The third lens P3 has negative refractive power. It is concave on the object side near the optical axis and convex on the image side.

[0244] The fourth lens P4 has positive refractive power; it is convex on the object side near the optical axis and convex on the image side.

[0245] The fifth lens, P5, has negative refractive power. It is convex on the object side near the optical axis and concave on the image side.

[0246] Table 1 shows the parameters of the zoom lens in Example 1.

[0247]

[0248]

[0249] Table 2 shows the aspherical parameters of the zoom lens in Example 1 (where K is the quadratic surface coefficient, and A4-A16 are the aspherical coefficients of the corresponding orders).

[0250]

[0251] Table 3 shows the key parameters of Example 1.

[0252]

[0253]

[0254] Please see Figure 2-7 These are, respectively, the performance graph, distortion curve graph, color difference graph, performance graph at an object distance of 450, performance graph at a low temperature of -30 degrees Celsius, and performance graph at a high temperature of 70 degrees Celsius in this embodiment.

[0255] Performance diagram at infinity object distance ( Figure 2 At a spatial frequency of 110 lp / mm, the MTF value of each field of view is greater than 0.4, indicating that the lens has high-resolution imaging capability, can meet the high pixel requirements, and the image details are clear and sharp.

[0256] Distortion curve ( Figure 3 The distortion value is controlled within 0 to 2.5%, which meets the design goal of small distortion and can ensure that the shape of the imaged object is real without obvious stretching or compression deformation.

[0257] Color difference diagram ( Figure 4 ): In the visible 435-650nm wide spectral band, the lateral color is less than 1.9um, ensuring that there is no blue-purple edge color difference in the image and that it has high image color reproduction.

[0258] Performance diagram at an object distance of 450° ( Figure 5 At a spatial frequency of 110 lp / mm, the MTF value of each field of view is greater than 0.3, indicating that the lens has high-resolution imaging capability, can meet the high pixel requirements, and the image details are clear and sharp.

[0259] Performance graph at a low temperature of -30 degrees Celsius ( Figure 6 At a spatial frequency of 110 lp / mm, the MTF value of each field of view is greater than 0.4, indicating that the lens has high-resolution imaging capability, can meet the high pixel requirements, and the image details are clear and sharp.

[0260] Performance diagram at a high temperature of 70 degrees Celsius ( Figure 7 At a spatial frequency of 110 lp / mm, the MTF value of each field of view is greater than 0.3, indicating that the lens has high-resolution imaging capability, can meet the high pixel requirements, and the image details are clear and sharp.

[0261] Example 2

[0262] Please see Figure 8 This embodiment provides a zoom lens, which includes a lens barrel 1 and a lens group disposed within the lens barrel 1. The lens group includes a TLENS module 2, a first lens P1, a second lens P2, a third lens P3, a fourth lens P4, and a fifth lens P5, which are arranged sequentially from the object side to the image side along the optical axis. The outer diameters of the first lens P1, second lens P2, third lens P3, fourth lens P4, and fifth lens P5 increase sequentially. A first light-transmitting element S1, a second light-transmitting element S2, a third light-transmitting element S3, and a fourth light-transmitting element S4 are disposed within the lens barrel 1. The first light-transmitting element S1... The first lens P1 and the second lens P2 are located between the first lens P1 and the second lens P2 and are in contact with the image side of the first lens P1. The second light-transmitting aperture element S2 is located between the second lens P2 and the third lens P3 and is in contact with the image side of the second lens P2. The third light-transmitting aperture element S3 is located between the third lens P3 and the fourth lens P4 and is in contact with the image side of the third lens P3. The fourth light-transmitting aperture element S4 is located between the fourth lens P4 and the fifth lens P5 and is in contact with the image side of the fourth lens P4. The curvature of the TLENS module 2 is adjustable. An aperture stop STO3 is provided between the TLENS module 2 and the first lens P1.

[0263] The first lens P1 has positive refractive power, and it is convex on the object side near the optical axis and concave on the image side.

[0264] The second lens P2 has positive refractive power, and it is convex on the object side near the optical axis and on the image side.

[0265] The third lens P3 has negative refractive power. It is concave on the object side near the optical axis and convex on the image side.

[0266] The fourth lens P4 has positive refractive power; it is convex on the object side near the optical axis and convex on the image side.

[0267] The fifth lens, P5, has negative refractive power. It is convex on the object side near the optical axis and concave on the image side.

[0268] Table 4 shows the parameters of the zoom lens in Example 2.

[0269] Surface number Surface name Surface type radius of curvature thickness Refractive index Abbe number surface surface spherical unlimited unlimited 1 2mm stop spherical unlimited 0.03 2 spherical unlimited 0.03 3 Flat window spherical unlimited 0.10 1.51 62.60 4 Polymer spherical unlimited 0.28 1.55 30.80 5 Membrane spherical unlimited 0.02 1.53 65.40 6 spherical unlimited 0.25 7 STO aperture stop spherical unlimited -0.10 8 First lens aspherical 1.57 0.44 1.55 55.99 9 aspherical 6.70 0.31 10 Second lens aspherical 18.91 0.40 1.55 55.99 11 aspherical -2.66 0.12 12 Third lens aspherical -0.85 0.25 1.68 19.28 13 aspherical -1.65 0.10 14 Fourth lens aspherical 20.00 0.64 1.65 23.50 15 aspherical -2.12 0.15 16 Fifth lens aspherical 1.53 0.50 1.67 20.38 17 aspherical 0.84 0.54 18 IR spherical unlimited 0.21 1.52 64.20 19 spherical unlimited 0.30 Image Image spherical unlimited -

[0270] Table 5 shows the aspherical parameters of the zoom lens in Example 2 (where K is the quadratic surface coefficient, and A4-A16 are the aspherical coefficients of the corresponding orders).

[0271]

[0272] Table 6 shows the key parameters of Example 2.

[0273] parameter value (L*IH) / TAN(FOV) 0.846 2*D0ow / D0iw 1.865 SAG31 / CT3 -1.244 EFL*LE02 / f2 0.990 EPD*IH / FNO 1.528 (R31*R32) / ((R51*R52)*R22) -0.413 R11*R22 -4.171 (R32*R21) / (R32+R21) -1.809 R12 / R22 -2.522 R41 / (R41*R42) -0.471 V2 / V3-V2 / V5 0.158 IN2*10 / V3 0.802 IN3*10 / V5 0.823 ((f1 / f2)*EFL)*100 / ((L345+BFL)*TAN(FOV)) 6.512 ((D1+D2+D3)-(D4+D5)) / TTL 0.438 (D2o+D2i) / f2-f1 / (D1o+D1i) -0.463 (f3+f4+f5) / (D5o+D4o+D4i+D3o+D3i) -0.299 (LE4+CT1+CT2+CT3+CT4) / DE4 0.473

[0274] Please see Figure 9-14 These are, respectively, the performance graph, distortion curve graph, color difference graph, performance graph at an object distance of 450, performance graph at a low temperature of -30 degrees Celsius, and performance graph at a high temperature of 70 degrees Celsius in this embodiment.

[0275] Performance diagram at infinity object distance ( Figure 9 At a spatial frequency of 110 lp / mm, the MTF value of each field of view is greater than 0.3, indicating that the lens has high-resolution imaging capability, can meet the high pixel requirements, and the image details are clear and sharp.

[0276] Distortion curve ( Figure 10 The distortion value is controlled within 0 to 2.5%, which meets the design goal of small distortion and can ensure that the shape of the imaged object is real without obvious stretching or compression deformation.

[0277] Color difference diagram ( Figure 11 (): In the visible 435-650nm wide spectral band, the lateral color is less than 1.7um, ensuring that there is no blue-purple edge color difference in the image and having high image color reproduction.

[0278] Performance diagram at an object distance of 450° ( Figure 12 At a spatial frequency of 110 lp / mm, the MTF value of each field of view is greater than 0.4, indicating that the lens has high-resolution imaging capability, can meet the high pixel requirements, and the image details are clear and sharp.

[0279] Performance graph at a low temperature of -30 degrees Celsius ( Figure 13At a spatial frequency of 110 lp / mm, the MTF value of each field of view is greater than 0.3, indicating that the lens has high-resolution imaging capability, can meet the high pixel requirements, and the image details are clear and sharp.

[0280] Performance diagram at a high temperature of 70 degrees Celsius ( Figure 14 At a spatial frequency of 110 lp / mm, the MTF value of each field of view is greater than 0.3, indicating that the lens has high-resolution imaging capability, can meet the high pixel requirements, and the image details are clear and sharp.

[0281] Example 3

[0282] Please see Figure 15 This embodiment provides a zoom lens, which includes a lens barrel 1 and a lens group disposed within the lens barrel 1. The lens group includes a TLENS module 2, a first lens P1, a second lens P2, a third lens P3, a fourth lens P4, and a fifth lens P5, which are arranged sequentially from the object side to the image side along the optical axis. The outer diameters of the first lens P1, second lens P2, third lens P3, fourth lens P4, and fifth lens P5 increase sequentially. A first light-transmitting element S1, a second light-transmitting element S2, a third light-transmitting element S3, and a fourth light-transmitting element S4 are disposed within the lens barrel 1. The first light-transmitting element S1... The first lens P1 and the second lens P2 are located between the first lens P1 and the second lens P2 and are in contact with the image side of the first lens P1. The second light-transmitting aperture element S2 is located between the second lens P2 and the third lens P3 and is in contact with the image side of the second lens P2. The third light-transmitting aperture element S3 is located between the third lens P3 and the fourth lens P4 and is in contact with the image side of the third lens P3. The fourth light-transmitting aperture element S4 is located between the fourth lens P4 and the fifth lens P5 and is in contact with the image side of the fourth lens P4. The curvature of the TLENS module 2 is adjustable. An aperture stop STO3 is provided between the TLENS module 2 and the first lens P1.

[0283] The first lens P1 has positive refractive power, and it is convex on the object side near the optical axis and concave on the image side.

[0284] The second lens P2 has positive refractive power, and its surface is concave on the object side near the optical axis and convex on the image side.

[0285] The third lens P3 has negative refractive power; it is concave on the object side near the optical axis and concave on the image side.

[0286] The fourth lens P4 has positive refractive power; it is concave on the object side near the optical axis and convex on the image side.

[0287] The fifth lens, P5, has negative refractive power. It is convex on the object side near the optical axis and concave on the image side.

[0288] Table 7 shows the parameters of the zoom lens in Example 3.

[0289] Surface number Surface name Surface type radius of curvature thickness Refractive index Abbe number surface surface spherical unlimited unlimited 1 2mm stop spherical unlimited 0.03 2 spherical unlimited 0.03 3 Flat window spherical unlimited 0.10 1.51 62.60 4 Polymer spherical unlimited 0.28 1.55 30.80 5 Membrane spherical unlimited 0.02 1.53 65.40 6 spherical unlimited 0.25 7 STO aperture stop spherical unlimited -0.10 8 First lens aspherical 1.76 0.50 1.55 55.99 9 aspherical 14.30 0.25 10 Second lens aspherical -15.06 0.32 1.54 55.71 11 aspherical -13.49 0.07 12 Third lens aspherical -5.56 0.30 1.67 20.38 13 aspherical 40.32 0.12 14 Fourth lens aspherical -4.62 0.75 1.54 55.71 15 aspherical -0.67 0.06 16 Fifth lens aspherical 5.00 0.46 1.57 37.53 17 aspherical 0.72 0.58 18 IR spherical unlimited 0.21 1.52 64.20 19 spherical unlimited 0.44 Image Image spherical unlimited -

[0290] Table 8 shows the aspherical parameters of the zoom lens in Example 3 (where K is the quadratic surface coefficient, and A4-A16 are the aspherical coefficients of the corresponding orders).

[0291]

[0292]

[0293] Table 9 shows the key parameters of Example 3.

[0294] parameter value (L*IH) / TAN(FOV) 0.452 2*D0ow / D0iw 1.792 SAG31 / CT3 -0.567 EFL*LE02 / f2 0.019 EPD*IH / FNO 1.642 (R31*R32) / ((R51*R52)*R22) 4.611 R11*R22 -23.748 (R32*R21) / (R32+R21) -24.025 R12 / R22 -1.060 R41 / (R41*R42) -1.493 V2 / V3-V2 / V5 1.249 IN2*10 / V3 0.754 IN3*10 / V5 0.444 ((f1 / f2)*EFL)*100 / ((L345+BFL)*TAN(FOV)) 0.061 ((D1+D2+D3)-(D4+D5)) / TTL 0.322 (D2o+D2i) / f2-f1 / (D1o+D1i) -1.146 (f3+f4+f5) / (D5o+D4o+D4i+D3o+D3i) -0.566 (LE4+CT1+CT2+CT3+CT4) / DE4 0.519

[0295] Please see Figure 16-21 These are, respectively, the performance graph, distortion curve graph, color difference graph, performance graph at an object distance of 450, performance graph at a low temperature of -30 degrees Celsius, and performance graph at a high temperature of 70 degrees Celsius in this embodiment.

[0296] Performance diagram at infinity object distance ( Figure 16 At a spatial frequency of 110 lp / mm, the MTF values ​​of each field of view are greater than 0.43, indicating that the lens has high-resolution imaging capabilities, can meet the requirements of high pixel count, and produces clear and sharp image details.

[0297] Distortion curve ( Figure 17 The distortion value is controlled within 0 to 2.5%, which meets the design goal of small distortion and can ensure that the shape of the imaged object is real without obvious stretching or compression deformation.

[0298] Color difference diagram ( Figure 18 (): In the visible 435-650nm wide spectral band, the lateral color is less than 1.7um, ensuring that there is no blue-purple edge color difference in the image and having high image color reproduction.

[0299] Performance diagram at an object distance of 450° ( Figure 19 At a spatial frequency of 110 lp / mm, the MTF value of each field of view is greater than 0.3, indicating that the lens has high-resolution imaging capability, can meet the high pixel requirements, and the image details are clear and sharp.

[0300] Performance graph at a low temperature of -30 degrees Celsius ( Figure 20 At a spatial frequency of 110 lp / mm, the MTF value of each field of view is greater than 0.3, indicating that the lens has high-resolution imaging capability, can meet the high pixel requirements, and the image details are clear and sharp.

[0301] Performance diagram at a high temperature of 70 degrees Celsius ( Figure 21 At a spatial frequency of 110 lp / mm, the MTF value of each field of view is greater than 0.4, indicating that the lens has high-resolution imaging capability, can meet the high pixel requirements, and the image details are clear and sharp.

[0302] In Embodiments 1, 2, and 3, an aperture stop STO3 is provided between the object side and the first lens P1. The aperture stop STO3 facilitates the effective focusing of light entering the optical lens, which helps to reduce the lens aperture. Furthermore, the aperture stop STO3 can be positioned close to the object side of the first lens P1.

[0303] This invention provides an electronic device comprising a zoom lens as described in any of the preceding claims, wherein the zoom lens further comprises an imaging element for converting the optical image formed by the zoom lens into an electrical signal.

[0304] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0305] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A zoom lens, characterized in that, It includes a lens barrel and a lens assembly disposed within the lens barrel. The lens assembly includes a TLENS module, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, arranged sequentially from the object side to the image side along the optical axis. The outer diameters of the first, second, third, fourth, and fifth lenses increase sequentially. A first, second, third, and fourth light-transmitting aperture element are disposed within the lens barrel. The first light-transmitting aperture element is located between the first and second lenses and contacts the image-side surface of the first lens. The second light-transmitting aperture element is located between the second and third lenses and contacts the image-side surface of the second lens. The third light-transmitting aperture element is located between the third and fourth lenses and contacts the image-side surface of the third lens. The fourth light-transmitting aperture element... The element is located between the fourth and fifth lenses and in contact with the image-side surface of the fourth lens. The curvature of the TLENS module is adjustable, and an aperture stop STO is provided between the TLENS module and the first lens. The first lens has positive refractive power, is convex on the object-side surface near the optical axis, and concave on the image-side surface. The second lens has positive refractive power, is either convex or concave on the object-side surface near the optical axis, and is convex on the image-side surface. The third lens has negative refractive power, is concave on the object-side surface near the optical axis, and is either convex or concave on the image-side surface. The fourth lens has positive refractive power, is either convex or concave on the object-side surface near the optical axis, and is convex on the image-side surface. The fifth lens has negative refractive power, is convex on the object-side surface near the optical axis, and is concave on the image-side surface. The zoom lens satisfies the following relationship: 0.45 < (L*IH) / TAN(FOV) < 0.85 in, L: Length of the lens barrel; IH: Half the diagonal length of the effective pixel area of ​​the sensor on the imaging surface; FOV: Maximum field of view of the optical system; 1.76 < 2 * D0ow / D0iw < 1.9 in, D0ow: Object-side outer diameter of the microscope tube; D0iw: Image-side outer diameter of the lens tube.

2. The zoom lens according to claim 1, characterized in that, It satisfies the following relationship: -1.25 <SAG31 / CT3<-0.55 in, SAG31: Sagitta of the third mirror object's side surface; CT3: Center thickness of the third lens.

3. The zoom lens according to claim 1, characterized in that, It satisfies the following relationship: 0.015 <EFL*LE02 / f2<1 in, EFL: Effective focal length of an optical camera lens; LE02: The distance along the optical axis from the side of the lens barrel to the side of the second light-transmitting element; f2: Focal length of the second lens element.

4. The zoom lens according to claim 1, characterized in that, It satisfies the following relationship: 1.3 <EPD*IH / FNO<1.7 in, EPD: Entrance pupil diameter of the optical system; IH: Half the diagonal length of the effective pixel area of ​​the sensor on the imaging surface; FNO: The F-number of an optical lens.

5. The zoom lens according to claim 1, characterized in that, It satisfies the following relationship: -0.5<(R31*R32) / ((R51*R52)*R22)<4.7 -23.8 <R11*R22<-4.1 -24.1<(R32*R21) / (R32+R21)<-1.8 -2.6 <R12 / R22<-0.5 -1.5 <R41 / (R41*R42)<-0.45 in, R11: Radius of curvature of the side surface of the first lens; R12: Radius of curvature of the side of the first lens image; R21: Radius of curvature of the side surface of the second lens object; R22: Radius of curvature of the image side of the second lens; R31: Radius of curvature of the side surface of the third lens object; R32: Radius of curvature of the side of the third lens image; R41: Radius of curvature of the side surface of the fourth lens; R42: Radius of curvature of the side of the fourth lens image; R51: Radius of curvature of the side surface of the fifth lens; R52: Radius of curvature of the side of the fifth lens image.

6. The zoom lens according to claim 1, characterized in that, It satisfies the following relationship: 0.15 <V2 / V3-V2 / V5<1.3 0.7 <IN2*10 / V3<0.9 0.4 <IN3*10 / V5<0.9 in, IN2: Refractive index of the second lens; V2: Abbe number of the second lens; IN3: Refractive index of the third lens; V3: Abbe number of the third lens; V5: Abbe number of the fifth lens.

7. The zoom lens according to claim 1, characterized in that, It satisfies the following relationship: 0.06<((f1 / f2)*EFL)*100 / ((L345+BFL)*TAN(FOV))<6.6 in, f1: Focal length of the first lens element; f2: Focal length of the second lens element; EFL: Effective focal length of an optical camera lens; L345: The distance on the optical axis from the image side surface of the second light-transmitting element to the image side surface end face of the lens barrel; BFL: Optical back focal length of a camera lens; FOV: Maximum field of view of the optical system.

8. The zoom lens according to claim 1, characterized in that, It satisfies the following relationship: 0.22 < ((D1+D2+D3)-(D4+D5)) / TTL < 0.44 in, D1: Diameter of the first lens; D2: Diameter of the second lens; D3: Diameter of the third lens; D4: Diameter of the fourth lens; D5: Diameter of the fifth lens; TTL: The distance on the optical axis from the object side of the first lens to the imaging surface of the optical system.

9. The zoom lens according to claim 1, characterized in that, It satisfies the following relationship: -1.2<(D2o+D2i) / f2-f1 / (D1o+D1i)<-0.4 -0.6<(f3+f4+f5) / (D5o+D4o+D4i+D3o+D3i)<-0.2 in, D2o: Inner diameter of the image side of the second lens; D2i: Inner diameter of the second lens object side surface; f2: Focal length of the second lens element; f1: Focal length of the first lens element; D1o: Inner diameter of the image side of the first lens; D1i: Inner diameter of the first lens object side surface; f3: Focal length of the third lens element; f4: Focal length of the fourth lens element; f5: Focal length of the fifth lens element; D5o: Inner diameter of the image side of the fifth lens; D4o: Inner diameter of the image side of the fourth lens; D4i: Inner diameter of the fourth lens object's side surface; D3o: Inner diameter of the image side of the third lens; D3i: Inner diameter of the third lens object side.

10. An electronic device, characterized in that, It includes a zoom lens as described in any one of claims 1-9, the zoom lens further including an imaging element for converting an optical image formed by the zoom lens into an electrical signal.

Images