An imaging lens and an imaging device

Abstract

This utility model discloses an imaging lens and an imaging device. The imaging lens includes multiple lens groups arranged sequentially from the object side to the image side, with corresponding optical axes formed between the multiple lens groups. The multiple lens groups include a first lens group with negative optical power, a second lens group with positive optical power, a third lens group with positive optical power, and a fourth lens group with negative optical power. At least one of the second and third lens groups is movably arranged along the extension direction of the optical axis to achieve focusing. The focal length of the imaging lens is f, 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, wherein -0.89 < f / f1 < -0.12, 0.05 < f / f2 < 0.52, 0.21 < f / f3 < 1.98, and -0.72 < f / f4 < -0.15. In the technical solution of this application, the imaging lens combines a large aperture, high image quality and small size, and can achieve good imaging effect even in low light conditions.

Description

Technical Field

[0001] This utility model relates to the field of optical lens technology, and in particular to an imaging lens and imaging device. Background Technology

[0002] With the miniaturization and high pixel count of imaging elements such as CCD and CMOS, camera devices are also being miniaturized. However, it is difficult to keep the imaging lens mounted on such camera devices small while maintaining a large aperture and high image quality, resulting in poor imaging performance in low-light conditions. Utility Model Content

[0003] The main objective of this invention is to provide an imaging lens and imaging device, which aims to provide an imaging lens that combines a large aperture, high image quality, and small size.

[0004] To achieve the above objectives, this utility model proposes an imaging lens, comprising multiple lens groups arranged sequentially from the object side to the image side, with the multiple lens groups corresponding to each other to form an optical axis, and the multiple lens groups including a first lens group with negative optical power, a second lens group with positive optical power, a third lens group with positive optical power, and a fourth lens group with negative optical power.

[0005] At least one of the second lens group and the third lens group is movably disposed along the extension direction of the optical axis to achieve focusing;

[0006] Wherein, the focal length of the imaging lens is f, 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, satisfying the following relationship:

[0007] -0.89<f / f1<-0.12, 0.05<f / f2<0.52, 0.21<f / f3<1.98, -0.72<f / f4<-0.15.

[0008] Optionally, the first lens group includes a first lens with negative optical power and a second lens with negative optical power arranged sequentially from the object side to the image side;

[0009] Wherein, the focal length of the first lens is f11, and the focal length of the second lens is f12, satisfying the following relationship:

[0010] 0.31<f1 / f11<0.96, 0.15<f1 / f12<0.56.

[0011] Optionally, the second lens group includes a third lens with negative optical power and a fourth lens with positive optical power arranged sequentially from the object side to the image side.

[0012] Wherein, the focal length of the third lens is f21, and the focal length of the fourth lens is f22, satisfying the following relationship:

[0013] -0.61<f2 / f21<-0.12, 0.35<f2 / f22<1.47.

[0014] Optionally, the third lens group includes a fifth lens with positive optical power, a sixth lens with negative optical power, a seventh lens with negative optical power, an eighth lens with positive optical power, a ninth lens with positive optical power, a tenth lens with positive optical power, an eleventh lens with negative optical power, a twelfth lens with positive optical power, and a thirteenth lens with positive optical power, arranged sequentially from the object side to the image side.

[0015] Wherein, the focal length of the fifth lens is f31, the focal length of the sixth lens is f32, the focal length of the seventh lens is f33, the focal length of the eighth lens is f34, the focal length of the ninth lens is f35, the focal length of the tenth lens is f36, the focal length of the eleventh lens is f37, the focal length of the twelfth lens is f38, and the focal length of the thirteenth lens is f39, satisfying the following relationship:

[0016] 0.05<f3 / f31<0.57, -0.73<f3 / f32<-0.17, -0.54<f3 / f33<-0.07, 0.24<f3 / f34<0.81, 0.28<f3 / f35<0.72, 0.45<f3 / f36<0.93, -2.05<f3 / f37<-0.81, 0.21<f3 / f38<0.95, 0.03<f3 / f39<0.23.

[0017] Optionally, at least one of the seventh lens and the eighth lens is an aspherical lens.

[0018] Optionally, the fourth lens group includes a fourteenth lens with negative optical power, the fourteenth lens having a focal length of f41, where f4 / f41 = 1;

[0019] The fourteenth lens is an aspherical lens.

[0020] Optionally, the imaging lens further includes an aperture stop, which is disposed between the third lens group and the fourth lens group; or,

[0021] The third lens group includes a plurality of lenses arranged sequentially from front to back, and the imaging lens also includes an aperture stop, which is disposed between two adjacent lenses of the third lens group.

[0022] Optionally, the distance between the aperture stop and the imaging surface of the imaging lens on the optical axis is L, and the total optical length of the imaging lens is TTL, where 0.32 < L / TTL < 0.65.

[0023] Optionally, the imaging lens further includes a filter and a photosensitive chip along the optical axis from the object side to the image side, wherein the filter and the photosensitive chip are disposed on the side of the fourth lens group closer to the image side.

[0024] This utility model also proposes an imaging device, which includes an imaging lens. The imaging lens includes a plurality of lens groups arranged sequentially from the object side to the image side. The plurality of lens groups form an optical axis in correspondence. The plurality of lens groups include a first lens group with negative optical power, a second lens group with positive optical power, a third lens group with positive optical power, and a fourth lens group with negative optical power.

[0025] At least one of the second lens group and the third lens group is movably disposed along the extension direction of the optical axis to achieve focusing;

[0026] Wherein, the focal length of the imaging lens is f, 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, satisfying the following relationship:

[0027] -0.89<f / f1<-0.12, 0.05<f / f2<0.52, 0.21<f / f3<1.98, -0.72<f / f4<-0.15.

[0028] In this invention, the imaging lens includes multiple lens groups arranged sequentially from the object side to the image side. These lens groups form an optical axis. Each lens group includes a first lens group with negative optical power, a second lens group with positive optical power, a third lens group with positive optical power, and a fourth lens group with negative optical power. At least one of the second and third lens groups is movably disposed along the extension direction of the optical axis. Thus, the movement of at least one of the second and third lens groups enables the imaging of the image. The focusing of the imaging lens not only shortens the focal length of the imaging lens, but also ensures that the image is clear within this focal length range, thereby reducing the size of the lens. The imaging lens satisfies the relationships -0.89 < f / f1 < -0.15, 0.05 < f / f2 < 0.52, 0.21 < f / f3 < 1.98, and -0.72 < f / f4 < -0.15. The imaging lens can be adapted to a large aperture, that is, the imaging lens combines a large aperture, high image quality and small size, and can also achieve good imaging results in low light conditions. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the telescopic end of an embodiment of the imaging lens provided by this utility model;

[0031] Figure 2 for Figure 1 MTF curve of a medium imaging lens;

[0032] Figure 3 for Figure 1 Field curvature and distortion curves of a medium imaging lens.

[0033] Explanation of icon numbers:

[0034] 100 Imaging lens 34 Eighth lens 1 First lens group 35 Ninth Lens 11 First lens 36 Tenth Lens 12 Second lens 37 Eleventh Lens 2 Second lens group 38 The Twelfth Lens 21 Third lens 39 The Thirteenth Lens 22 Fourth lens 4 Fourth lens group 3 Third lens group 41 Fourteenth Lens 31 Fifth lens 5 Aperture stop 32 Sixth lens 6 Filter 33 Seventh Lens 7 Photosensitive chip

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0039] With the miniaturization and high pixel count of imaging elements such as CCD and CMOS, camera devices are also being miniaturized. However, it is difficult to keep the imaging lens mounted on such camera devices small while maintaining a large aperture and high image quality, resulting in poor imaging performance in low-light conditions.

[0040] To address the aforementioned issues, this invention proposes an imaging lens and imaging device, aiming to provide an imaging lens that combines a large aperture, high image quality, and small size. Figure 1 This is a schematic diagram of the structure of an embodiment of the imaging lens provided by this utility model.

[0041] Please refer to Figure 1 This utility model proposes an imaging lens 100, comprising a plurality of lens groups arranged sequentially from the object side to the image side, with the plurality of lens groups corresponding to each other to form an optical axis. The plurality of lens groups include a first lens group 1 with negative optical power, a second lens group 2 with positive optical power, a third lens group 3 with positive optical power, and a fourth lens group 4 with negative optical power. At least one of the second lens group 2 and the third lens group 3 is movably arranged along the extension direction of the optical axis to achieve focusing. The focal length of the imaging lens 100 is f, 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, wherein -0.89 < f / f1 < -0.12, 0.05 < f / f2 < 0.52, 0.21 < f / f3 < 1.98, and -0.72 < f / f4 < -0.15.

[0042] In this utility model's technical solution, the imaging lens 100 includes multiple lens groups arranged sequentially from the object side to the image side. These multiple lens groups correspond to each other and form an optical axis. Each lens group includes a first lens group 1 with negative optical power, a second lens group 2 with positive optical power, a third lens group 3 with positive optical power, and a fourth lens group 4 with negative optical power. At least one of the second lens group 2 and the third lens group 3 is movably disposed along the extension direction of the optical axis. Thus, the movement of at least one of the second lens group 2 and the third lens group 3 enables the imaging of the object... The focusing of the imaging lens 100 not only shortens the focal length of the imaging lens 100, but also ensures that the image is clear within the focal length range, thereby reducing the size of the lens. The imaging lens 100 satisfies the relationships -0.89 < f / f1 < -0.15, 0.05 < f / f2 < 0.52, 0.21 < f / f3 < 1.98, and -0.72 < f / f4 < -0.15. The imaging lens 100 can be adapted to a large aperture, that is, the imaging lens 100 combines a large aperture, high image quality and small size, and can also achieve good imaging results in low light conditions.

[0043] Specifically, in order to improve the imaging effect of the imaging lens 100, in the optimal embodiment, f / f1 = -(2 / 5), f / f2 = 1 / 5, f / f3 = 14 / 25, f / f4 = -(131 / 400); thus, the imaging quality of the imaging lens 100 reaches the optimal state.

[0044] In an embodiment of this utility model, the first lens group 1 includes a first lens 11 with negative optical power and a second lens 12 with negative optical power arranged sequentially from the object side to the image side; wherein, the focal length of the first lens 11 is f11 and the focal length of the second lens 12 is f12, satisfying 0.31 < f1 / f11 < 0.96 and 0.15 < f1 / f12 < 0.56.

[0045] Specifically, the first lens 11 is a convex-concave lens, meaning the object-side surface of the first lens 11 is convex and the image-side surface is concave; the second lens 12 is a convex-concave lens, meaning the object-side surface of the second lens 12 is convex and the image-side surface is concave. Preferably, the specific ratios of the first lens group 1 and each lens therein are f1 / f11 = 29 / 50 and f1 / f12 = 9 / 25, and the optical powers of the first lens 11 to the second lens 12 are -190 and -313, respectively.

[0046] In an embodiment of this utility model, the second lens group 2 includes a third lens 21 with negative optical power and a fourth lens 22 with positive optical power arranged sequentially from the object side to the image side; wherein, the focal length of the third lens 21 is f21 and the focal length of the fourth lens 22 is f22, satisfying -0.61 < f2 / f21 < -0.12 and 0.35 < f2 / f22 < 1.47.

[0047] Specifically, the third lens 21 is a concave-convex lens, meaning its object-side surface is concave and its image-side surface is convex; the fourth lens 22 is a biconvex lens, meaning its object-side surface is convex and its image-side surface is convex. Preferably, in this embodiment, the specific ratios of the second lens group 12 and each lens therein are f2 / f21 = -(27 / 50) and f2 / f22 = 71 / 50, and the optical powers of the third lens 21 to the fourth lens 22 are -438 and 164, respectively.

[0048] In an embodiment of this utility model, the third lens group 3 includes, sequentially arranged from the object side to the image side, a fifth lens 31 with positive optical power, a sixth lens 32 with negative optical power, a seventh lens 33 with negative optical power, an eighth lens 34 with positive optical power, a ninth lens 35 with positive optical power, a tenth lens 36 with positive optical power, an eleventh lens 37 with negative optical power, a twelfth lens 38 with positive optical power, and a thirteenth lens 39 with positive optical power; wherein, the focal length of the fifth lens 31 is f31, the focal length of the sixth lens 32 is f32, the focal length of the seventh lens 33 is f33, the focal length of the eighth lens 34 is f34, and the focal length of the ninth lens 35 is f34. The focal lengths of the tenth lens 36, the eleventh lens 37, the twelfth lens 38, and the thirteenth lens 39 are all f35, satisfying the following conditions: 0.05 < f3 / f31 < 0.57, -0.73 < f3 / f32 < -0.17, -0.54 < f3 / f33 < -0.07, 0.24 < f3 / f34 < 0.81, 0.28 < f3 / f35 < 0.72, 0.45 < f3 / f36 < 0.93, -2.05 < f3 / f37 < -0.81, 0.21 < f3 / f38 < 0.95, and 0.03 < f3 / f39 < 0.23.

[0049] Specifically, in this embodiment, the fifth lens 31 is a biconvex lens, meaning that both the object-side and image-side surfaces of the fifth lens 31 are convex; the sixth lens 32 is a biconcave lens, meaning that both the object-side and image-side surfaces of the sixth lens 32 are concave; the seventh lens 33 is a concave-convex lens, meaning that the object-side surface of the seventh lens 33 is concave and the image-side surface is convex; the eighth lens 34 is a biconvex lens, meaning that both the object-side and image-side surfaces of the eighth lens 34 are convex; and the ninth lens 35 is a biconvex lens, meaning... The object-side and image-side surfaces of the ninth lens 35 are both convex; the tenth lens 36 is a biconvex lens, meaning that both the object-side and image-side surfaces of the tenth lens 36 are convex; the eleventh lens 37 is a biconcave lens, meaning that both the object-side and image-side surfaces of the eleventh lens 37 are concave; the twelfth lens 38 is a biconvex lens, meaning that both the object-side and image-side surfaces of the twelfth lens 38 are convex; and the thirteenth lens 39 is a concave-convex lens, meaning that the object-side surface of the thirteenth lens 39 is concave and the image-side surface is convex. Preferably, the specific ratios of the third lens group 21 to each lens therein are as follows: f3 / f31 = 5 / 58, f3 / f32 = -(9 / 44), f3 / f33 = -(7 / 22), f3 / f34 = 31 / 51, f3 / f35 = 24 / 37, f3 / f36 = 43 / 58, f3 / f37 = -(5 / 3), f3 / f38 = 20 / 77, f3 / f39 = 13 / 58. The optical powers of the fifth lens 31 to the thirteenth transparent lens are, respectively: 919, -387, -248, 130, 122, 107, -48, 305, 353.

[0050] Furthermore, in this embodiment, the fifth lens 31 and the sixth lens 32 constitute a first cemented lens, wherein the focal length of the first cemented lens is f301, and satisfies -0.24 < f3 / f301 < -0.01. Preferably, in this embodiment, the specific ratio of the third lens group 3 to the first cemented lens is f3 / f301 = -(13 / 1000).

[0051] Furthermore, in this embodiment, the tenth lens 36 and the eleventh lens 37 constitute a second cemented lens, wherein the focal length of the second cemented lens is f302, and satisfies -0.21 < f3 / f302 < -0.65; in this embodiment, the specific ratio of the third lens group 21 and the second cemented lens is f3 / f302 = -(29 / 50).

[0052] Furthermore, the twelfth lens 38 and the thirteenth lens 39 constitute a third cemented lens, wherein the focal length of the third cemented lens is f3 / f303, and satisfies the following condition: 0.34 < f3 / f303 < 0.87; where f3 is the focal length of the third lens group 3, and f303 is the focal length of the second cemented lens. In this embodiment, the specific ratio of the third lens group 3 and the third cemented lens is f3 / f303 = 3 / 5.

[0053] In embodiments of this invention, at least one of the seventh lens 33 and the eighth lens 34 is an aspherical lens. Specifically, in this embodiment, the seventh lens 33 is an aspherical lens.

[0054] It should be noted that the characteristic of aspherical lenses is that the curvature changes continuously from the center to the periphery of the lens. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspherical lenses have better curvature radius characteristics. They have the advantages of improving distortion aberration and astigmatism aberration. By using aspherical lenses, aberrations that occur during imaging can be eliminated as much as possible, thereby improving the image quality of the lens.

[0055] In an embodiment of this utility model, the fourth lens group 4 includes a fourteenth lens 41 with negative optical power, the focal length of the fourteenth lens 41 being f41, wherein f4 / f41 = 1; the fourteenth lens 41 is an aspherical lens. Specifically, the optical power of the fourteenth lens 41 is -137.

[0056] In an embodiment of this utility model, the imaging lens 100 further includes an aperture stop 5, which is disposed between the third lens group 3 and the fourth lens group 4; the third lens group 3 includes a plurality of lenses arranged sequentially along the optical axis, and the imaging lens 100 further includes an aperture stop 5, which is disposed between two adjacent lenses of the third lens group 3.

[0057] Specifically, in this embodiment, the aperture stop 5 is arranged between the second lens group 2 and the third lens group 3, and is fixedly connected to the third lens group 3 so that it can be moved in the front-back direction by the third lens group 3. The aperture stop 5 can limit the imaging beam to the greatest extent; the position of the aperture stop 5 and the size of its light passage directly affect the brightness, sharpness, and some aberrations of the image formed by the imaging lens 100. By placing the aperture stop 5 in front of the third lens group 3 and moving synchronously with the third lens group 3 in the front-back direction, the image can have suitable brightness and sharpness during the zooming process of the aperture stop 5.

[0058] Furthermore, the aperture stop 5 is an adjustable aperture stop, which can adjust the aperture according to changes in ambient light intensity. The aperture stop 5 is used to limit the light beam to further improve the imaging quality of the imaging lens 100.

[0059] In an embodiment of this invention, the distance between the aperture stop 5 and the imaging surface of the imaging lens 100 on the optical axis is L, and the total optical length of the imaging lens 100 is TTL, where 0.32 < L / TTL < 0.65. Specifically, in this embodiment, L / TTL = 9 / 20.

[0060] In an embodiment of this invention, the imaging lens 100 further includes a photosensitive chip 7, which is disposed on the side of the fourth lens group 4 near the image side. This allows the imaging lens 100 to receive the image on the image side.

[0061] Furthermore, the imaging lens 100 also includes a filter 6, which is located between the fourteenth lens 41 and the photosensitive chip 7. The filter 6 is used to filter out light and stray light of unnecessary wavelengths, thereby improving the imaging quality.

[0062] Furthermore, the imaging lens 100 may also include a protective glass disposed between the filter 6 and the photosensitive chip 7 to prevent damage to the internal components of the imaging lens 100.

[0063] It should be noted that the basic parameters of the imaging lens 100 in this embodiment are shown in Tables 1-4, where the units of the radius of curvature and center distance in Table 1 and the unit of the radius of curvature in Table 2 are all millimeters (mm).

[0064] Table 1

[0065]

[0066]

[0067] Table 2

[0068]

[0069] Table 3

[0070] F number 1.1 Field of view 60 Like Gao 50

[0071] Table 4

[0072]

[0073]

[0074] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An imaging lens, characterized in that, It includes multiple lens groups arranged sequentially from the object side to the image side, with the multiple lens groups corresponding to each other to form an optical axis. The multiple lens groups include a first lens group with negative optical power, a second lens group with positive optical power, a third lens group with positive optical power, and a fourth lens group with negative optical power. At least one of the second lens group and the third lens group is movably disposed along the extension direction of the optical axis to achieve focusing; Wherein, the focal length of the imaging lens is f, 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, satisfying the following relationship: -0.89<f / f1<-0.12, 0.05<f / f2<0.52, 0.21<f / f3<1.98, -0.72<f / f4<-0.

15.

2. The imaging lens as described in claim 1, characterized in that, The first lens group includes a first lens with negative optical power and a second lens with negative optical power arranged sequentially from the object side to the image side; Wherein, the focal length of the first lens is f11, and the focal length of the second lens is f12, satisfying the following relationship: 0.31<f1 / f11<0.96, 0.15<f1 / f12<0.

56.

3. The imaging lens as described in claim 1, characterized in that, The second lens group includes a third lens with negative optical power and a fourth lens with positive optical power arranged sequentially from the object side to the image side; Wherein, the focal length of the third lens is f21, and the focal length of the fourth lens is f22, satisfying the following relationship: -0.61<f2 / f21<-0.12, 0.35<f2 / f22<1.

47.

4. The imaging lens as described in claim 1, characterized in that, The third lens group includes a fifth lens with positive optical power, a sixth lens with negative optical power, a seventh lens with negative optical power, an eighth lens with positive optical power, a ninth lens with positive optical power, a tenth lens with positive optical power, an eleventh lens with negative optical power, a twelfth lens with positive optical power, and a thirteenth lens with positive optical power, arranged sequentially from the object side to the image side. Wherein, the focal length of the fifth lens is f31, the focal length of the sixth lens is f32, the focal length of the seventh lens is f33, the focal length of the eighth lens is f34, the focal length of the ninth lens is f35, the focal length of the tenth lens is f36, the focal length of the eleventh lens is f37, the focal length of the twelfth lens is f38, and the focal length of the thirteenth lens is f39, satisfying the following relationship: 0.05<f3 / f31<0.57, -0.73<f3 / f32<-0.17, -0.54<f3 / f33<-0.07, 0.24<f3 / f34<0.81, 0.28<f3 / f35<0.72, 0.45<f3 / f36<0.93, -2.05<f3 / f37<-0.81, 0.21<f3 / f38<0.95, 0.03<f3 / f39<0.

23.

5. The imaging lens as described in claim 4, characterized in that, At least one of the seventh lens and the eighth lens is an aspherical lens.

6. The imaging lens as described in claim 1, characterized in that, The fourth lens group includes a fourteenth lens with negative optical power, the fourteenth lens having a focal length of f41, where f4 / f41 = 1; The fourteenth lens is an aspherical lens.

7. The imaging lens as described in claim 1, characterized in that, The imaging lens further includes an aperture stop, which is disposed between the third lens group and the fourth lens group; or... The third lens group includes a plurality of lenses arranged sequentially from front to back, and the imaging lens also includes an aperture stop, which is disposed between two adjacent lenses of the third lens group.

8. The imaging lens as described in claim 7, characterized in that, The distance between the aperture stop and the imaging surface of the imaging lens on the optical axis is L, and the total optical length of the imaging lens is TTL, where 0.32 < L / TTL < 0.

65.

9. The imaging lens as described in claim 1, characterized in that, The imaging lens also includes a filter and a photosensitive chip along the optical axis from the object side to the image side, wherein the filter and the photosensitive chip are disposed on the side of the fourth lens group closer to the image side.

10. An imaging device, characterized in that, Including the imaging lens as described in any one of claims 1 to 9.

Images