Fatigue driving prevention module lens

Abstract

The utility model discloses an anti-fatigue driving module lens, which comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged along a light incidence direction, and is characterized in that the first lens is a concave-convex spherical lens with negative focal power; the second lens is a convex-concave spherical lens with negative focal power; the third lens is a biconvex spherical lens with positive focal power; the fourth lens is a concave-convex spherical lens with positive focal power; the requirement of 2.05 lt is met; f2 / f1lt; 2.34, 2.34; 39.19 lt, 39.19 lt; f4 / f3lt; 90.8, 90.8. The lens adopts a negative-negative-positive-positive focal power structure, so that the total optical length TTL of the lens can be further reduced, and by adopting the structure of the proportional relation, the total optical length can be less than or equal to 11mm on the premise that the field angle of the lens is greater than or equal to 80 degrees, so that the size of the whole DMS system is reduced, and the high-precision and high-pixel imaging requirements are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical lenses, and particularly relates to an anti-fatigue driving module lens. Background Art

[0002] With the development of automotive technology, anti-fatigue driving systems are becoming increasingly popular, such as DMS (driver monitoring system). This system mainly realizes functions such as driver identification, driver fatigue monitoring, driver attention monitoring, and monitoring of dangerous driving behaviors, and issues alarms in a timely manner for reminders. It is applicable to fields such as logistics, freight transportation, public transportation, and intelligent driving, aiming to increase driving safety and reduce the occurrence of traffic accidents. Specific fatigue, attention, and dangerous behavior detections mainly include whether the driver yawns, closes eyes, smokes, makes phone calls, drinks water, deliberately blocks, or does not fasten the seat belt, etc.

[0003] Currently, for the DMS anti-fatigue driving module lens, a patent with the authorization announcement number CN217181324U discloses a DMS lens, which includes a first lens, a diaphragm, a second lens, a third lens, and a fourth lens arranged in sequence along an optical axis from the object side to the image side. Each of the first lens to the fourth lens includes an object side surface and an image side surface. The first lens has a negative refractive power, and the object side surface of the first lens is convex, and the image side surface is concave. The second lens has a negative refractive power, and the object side surface of the second lens is concave, and the image side surface is concave. The third lens has a positive refractive power, and the object side surface of the third lens is concave, and the image side surface is convex. The fourth lens has a positive refractive power, and the object side surface of the fourth lens is convex, and the image side surface is convex. However, the maximum field of view angle of the lens in this solution is only about 60°, which cannot meet the application requirements of actual scenarios and is not conducive to improving the accuracy of driving behavior detection. Summary of the Utility Model

[0004] The purpose of the utility model is to propose an anti-fatigue driving module lens aiming at the above problems, which has a large field of view and meets the imaging requirements of miniaturization, high precision, and high pixel.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An anti-fatigue driving module lens proposed by the utility model includes a first lens, a second lens, a third lens, and a fourth lens arranged in sequence along the light incident direction, where:

[0007] The first lens is a concave-convex spherical lens with a negative optical power;

[0008] The second lens is a convex-concave spherical lens with a negative optical power;

[0009] The third lens is a biconvex spherical lens with a positive optical power;

[0010] The fourth lens is a meniscus spherical lens with a positive optical power;

[0011] And the following conditions are satisfied:

[0012] 2.05 < f2 / f1 < 2.34; 39.19 < f4 / f3 < 90.8;

[0013] Wherein, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, and the unit is mm.

[0014] Preferably, the anti-fatigue driving module lens also satisfies the following conditions:

[0015] -4.7 < L1R1 < -4.3; -10.92 < L1R2 < -10.3; 3 < L2R1 < 3.2; 2.1 < L2R2 < 2.4;

[0016] 4.1 < L3R1 < 4.4; -4.97 < L3R2 < -4.825; -2.8 < L4R1 < -2.6; -3.26 < L4R2 < -3.1;

[0017] Wherein, L1R1 is the radius of curvature of the object-side mirror surface of the first lens, L1R2 is the radius of curvature of the image-side mirror surface of the first lens, L2R1 is the radius of curvature of the object-side mirror surface of the second lens, L2R2 is the radius of curvature of the image-side mirror surface of the second lens, L3R1 is the radius of curvature of the object-side mirror surface of the third lens, L3R2 is the radius of curvature of the image-side mirror surface of the third lens, L4R1 is the radius of curvature of the object-side mirror surface of the fourth lens, L4R2 is the radius of curvature of the image-side mirror surface of the fourth lens, and the unit is mm.

[0018] Preferably, the value ranges of the focal lengths of the respective lenses are as follows:

[0019] -10.1 < f1 < -9.4; -22 < f2 < -19.8; 2.64 < f3 < 2.7; 100 < f4 < 245.

[0020] Preferably, the refractive index Nd1 of the first lens satisfies:

[0021] 1.8 < Nd1 < 2.0, 25 < vd1 < 35; 1.55 < Nd2 < 1.7, 33 < vd2 < 40;

[0022] 1.85 < Nd3 < 1.95, 30 < vd3 < 40; 1.85 < Nd4 < 1.95, 30 < vd4 < 40;

[0023] Wherein, Nd1 is the refractive index of the first lens, vd1 is the Abbe number of the first lens, Nd2 is the refractive index of the second lens, vd2 is the Abbe number of the second lens, Nd3 is the refractive index of the third lens, vd3 is the Abbe number of the third lens, Nd4 is the refractive index of the fourth lens, and vd4 is the Abbe number of the fourth lens.

[0024] Preferably, the optical total length TTL and the field of view angle DFOV of the anti-fatigue driving module lens satisfy: TTL ≤ 11 mm, DFOV ≥ 80°.

[0025] Preferably, the first lens, the second lens, the third lens, and the fourth lens are all spherical glass lenses.

[0026] Preferably, the anti-fatigue driving module lens further includes a diaphragm, and the diaphragm is located between the second lens and the third lens.

[0027] Preferably, the anti-fatigue driving module lens further includes a filter, and the filter is located on the image side of the fourth lens.

[0028] Preferably, the anti-fatigue driving module lens further satisfies the following conditions:

[0029] 0.85 < D1 < 0.87; 1.9 < D2 < 2.2; 0.7 < D3 < 0.85; 0.42 < D4 < 0.44;

[0030] 0.7 < D5 < 0.86; 0.3 < D6 < 0.33; 1.1 < D7 < 1.2; 4.3 < D8 < 4.5;

[0031] Wherein, D1 is the thickness of the first lens, D2 is the air gap between the first lens and the second lens, D3 is the thickness of the second lens, D4 is the air gap between the second lens and the third lens, D5 is the thickness of the third lens, D6 is the air gap between the third lens and the fourth lens, D7 is the thickness of the fourth lens, and D8 is the air gap between the fourth lens and the filter, with the unit of mm.

[0032] Preferably, the focal length f of the anti-fatigue driving module lens satisfies: 3.5 ≤ f ≤ 3.6, with the unit of mm.

[0033] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0034] The anti-fatigue driving module lens adopts four spherical lenses with negative, negative, positive, and positive optical power structures, achieving the optical parameter requirements of an optical total length less than or equal to 11 mm and a field of view angle greater than or equal to 80°, enabling a wider detection range and meeting the imaging requirements of miniaturization, high precision, and high pixel count; moreover, the first lens uses a concave-convex shape and a spherical glass lens with a high refractive index, which is beneficial to reducing the light turning angle difference, thereby facilitating the expansion of the assembly and processing tolerance range. Brief Description of the Drawings

[0035] Figure 1 This is a schematic structural diagram of the lens of the anti-fatigue driving module of the present utility model;

[0036] Figure 2 This is the MTF graph of Embodiment 1 of the present utility model;

[0037] Figure 3 This is the astigmatism graph of Embodiment 1 of the present utility model;

[0038] Figure 4 This is the scatter plot of Embodiment 1 of the present utility model;

[0039] Figure 5 This is the MTF graph of Embodiment 2 of the present utility model;

[0040] Figure 6 This is the astigmatism graph of Embodiment 2 of the present utility model;

[0041] Figure 7 This is the scatter plot of Embodiment 2 of the present utility model;

[0042] Figure 8 This is the MTF graph of Embodiment 3 of the present utility model;

[0043] Figure 9 This is the astigmatism graph of Embodiment 3 of the present utility model;

[0044] Figure 10 This is the scatter plot of Embodiment 3 of the present utility model.

[0045] Description of the reference numerals: L1, the first lens; L2, the second lens; L3, the third lens; L4, the fourth lens; STO, the aperture stop; IR, the filter; IMA, the image plane. Detailed Description of the Preferred Embodiments

[0046] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0047] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there may also be an intermediate component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field of the present application. The terms used in the description of the present application in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0048] As Figure 1 shown, an anti-fatigue driving module lens includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged in sequence along the light incident direction, where:

[0049] The first lens L1 is a concave-convex spherical lens with a negative optical power;

[0050] The second lens L2 is a convex-concave spherical lens with a negative optical power;

[0051] The third lens L3 is a biconvex spherical lens with a positive optical power;

[0052] The fourth lens L4 is a concave-convex spherical lens with a positive optical power;

[0053] And the following conditions are satisfied:

[0054] 2.05 < f2 / f1 < 2.34; 39.19 < f4 / f3 < 90.8;

[0055] Wherein, f1 is the focal length of the first lens L1, f2 is the focal length of the second lens L2, f3 is the focal length of the third lens L3, and f4 is the focal length of the fourth lens L4, with the unit of mm.

[0056] Among them, the lens adopts a negative-negative-positive-positive optical power structure, which can further reduce the total optical length TTL of the lens. A structure that satisfies the above proportional relationship can make the TTL satisfy less than or equal to 11 mm on the premise that the field of view angle DFOV is greater than or equal to 80°, thereby reducing the size of the entire DMS system, and the full-field image quality can also meet a certain level. The object-side mirror surface of the first lens L1 is concave and is combined with a high-refractive-index material, which can reduce glare and distortion, reduce internal reflection of the lens, make the resolution in the field of view clearer, and can avoid contact and friction of the lens surface with foreign objects, reducing appearance wear such as scratches.

[0057] In an embodiment, the anti-fatigue driving module lens further satisfies the following conditions:

[0058] -4.7 < L1R1 < -4.3; -10.92 < L1R2 < -10.3; 3 < L2R1 < 3.2; 2.1 < L2R2 < 2.4;

[0059] 4.1 < L3R1 < 4.4; -4.97 < L3R2 < -4.825; -2.8 < L4R1 < -2.6; -3.26 < L4R2 < -3.1;

[0060] Among them, L1R1 is the radius of curvature of the object-side mirror surface of the first lens L1, L1R2 is the radius of curvature of the image-side mirror surface of the first lens L1, L2R1 is the radius of curvature of the object-side mirror surface of the second lens L2, L2R2 is the radius of curvature of the image-side mirror surface of the second lens L2, L3R1 is the radius of curvature of the object-side mirror surface of the third lens L3, L3R2 is the radius of curvature of the image-side mirror surface of the third lens L3, L4R1 is the radius of curvature of the object-side mirror surface of the fourth lens L4, and L4R2 is the radius of curvature of the image-side mirror surface of the fourth lens L4, with the unit of mm. Restricting the range of the radius of curvature of the lens can reduce aberration such as spherical aberration of the lens and improve the MTF value of the resolution.

[0061] In one embodiment, the focal length value ranges of each lens are as follows:

[0062] -10.1 < f1 < -9.4; -22 < f2 < -19.8; 2.64 < f3 < 2.7; 100 < f4 < 245. In one embodiment, the refractive index Nd1 of the first lens L1 satisfies:

[0063] 1.8 < Nd1 < 2.0, 25 < vd1 < 35; 1.55 < Nd2 < 1.7, 33 < vd2 < 40;

[0064] 1.85 < Nd3 < 1.95, 30 < vd3 < 40; 1.85 < Nd4 < 1.95, 30 < vd4 < 40;

[0065] Among them, Nd1 is the refractive index of the first lens L1, vd1 is the Abbe number of the first lens L1, Nd2 is the refractive index of the second lens L2, vd2 is the Abbe number of the second lens L2, Nd3 is the refractive index of the third lens L3, vd3 is the Abbe number of the third lens L3, Nd4 is the refractive index of the fourth lens L4, and vd4 is the Abbe number of the fourth lens L4.

[0066] In one embodiment, the optical total length TTL and the field of view angle DFOV of the anti-fatigue driving module lens satisfy: TTL ≤ 11 mm, DFOV ≥ 80°. While ensuring that the size of the anti-fatigue driving module lens is reduced, the required installation space is reduced, and there is still a large field of view detection range.

[0067] In one embodiment, the first lens L1, the second lens L2, the third lens L3, and the fourth lens L4 are all glass spherical lenses. Using glass spherical lenses can reduce the mold opening cost and lower the cost.

[0068] In one embodiment, the anti-fatigue driving module lens further includes a diaphragm STO, and the diaphragm STO is located between the second lens L2 and the third lens L3. The position where the diaphragm STO is set can make the light turning angle between the lenses small, so as to reduce the generation of aberration.

[0069] In one embodiment, the anti-fatigue driving module lens further includes an IR filter, and the IR filter is located on the image side of the fourth lens L4. By using a narrow-band IR filter, stray light interference can be reduced, and the imaging quality can be further improved.

[0070] In one embodiment, the anti-fatigue driving module lens further satisfies the following conditions:

[0071] 0.85 < D1 < 0.87; 1.9 < D2 < 2.2; 0.7 < D3 < 0.85; 0.42 < D4 < 0.44;

[0072] 0.7 < D5 < 0.86; 0.3 < D6 < 0.33; 1.1 < D7 < 1.2; 4.3 < D8 < 4.5;

[0073] Wherein, D1 is the thickness of the first lens L1, D2 is the air gap between the first lens L1 and the second lens L2, D3 is the thickness of the second lens L2, D4 is the air gap between the second lens L2 and the third lens L3, D5 is the thickness of the third lens L3, D6 is the air gap between the third lens L3 and the fourth lens L4, D7 is the thickness of the fourth lens L4, and D8 is the air gap between the fourth lens L4 and the IR filter, with the unit of mm. By restricting the thickness and air gap ranges of each lens, the aberration can be optimized and the MTF value of the resolution can be improved.

[0074] In one embodiment, the focal length f of the anti-fatigue driving module lens satisfies: 3.5 ≤ f ≤ 3.6, with the unit of mm. By restricting the lens focal length range, it can be ensured that the lens field of view angle is greater than 80°.

[0075] The present utility model aims to provide a DMS anti-fatigue driving module lens with a simple structure and low cost, which can meet the parameter requirements of a large field of view angle, low cost, and short total optical length (such as a field of view angle greater than 80° and a total optical length less than or equal to 11 mm). Moreover, the first lens uses a convex-concave shaped and high refractive index glass spherical lens, such as a glass material with a refractive index of 1.90 and an Abbe number of 31.3, which is beneficial to reducing the light turning angle difference, thereby facilitating the expansion of the assembly and processing tolerance range.

[0076] For easy understanding, the following will be elaborated in detail through specific embodiments.

[0077] Embodiment 1:

[0078] The lens is configured with four lenses, including a negative refractive power concave-convex spherical glass lens (the first lens L1), a negative refractive power convex-concave spherical glass lens (the second lens L2), a positive refractive power biconvex spherical glass lens (the third lens L3), and a positive refractive power concave-convex spherical glass lens (the fourth lens L4) arranged in sequence along the light incident direction. The light passes through the first lens L1, the second lens L2, the aperture STO, the third lens L3, the fourth lens L4, and the filter IR in sequence to reach the image plane IMA. The optical parameters of each lens are as shown in Table 1 below:

[0079] Table 1

[0080]

[0081] Furthermore, the relevant parameters of the lens are as shown in Table 2 below:

[0082] Table 2

[0083] f TTL DFOV f1 f2 f3 f4 3.5 10.68 82° -9.21 -19.72 2.641 103.525

[0084] In the above table, Nd is the refractive index, vd is the Abbe number, and the R value is the radius of curvature.

[0085] According to the above parameters, as Figures 2 - 4 shown, the lens can achieve a full-field MTF greater than 0.6 at 75 lp / mm, an optical total length less than 11 mm, a field of view angle greater than 80°, and the astigmatism is controlled within 0.1, and the geometric spot diagram is controlled within 42 um, meeting the imaging requirements of miniaturization, high precision, and high pixel count.

[0086] Example 2:

[0087] The lens is configured with four lenses, including a negative refractive power concave-convex spherical glass lens (the first lens L1), a negative refractive power convex-concave spherical glass lens (the second lens L2), a positive refractive power biconvex spherical glass lens (the third lens L3), and a positive refractive power concave-convex spherical glass lens (the fourth lens L4) arranged in sequence along the light incident direction. The light passes through the first lens L1, the second lens L2, the aperture STO, the third lens L3, the fourth lens L4, and the filter IR in sequence to reach the image plane IMA. The optical parameters of each lens are as shown in Table 3 below:

[0088] Table 3

[0089]

[0090]

[0091] Furthermore, the relevant parameters of the lens are as shown in Table 4 below:

[0092] Table 4

[0093] f TTL DFOV f1 f2 f3 f4 3.56 10.75 82° -9.35 -21.8 2.656 241.1

[0094] In the above table, Nd is the refractive index, vd is the Abbe number, and the R value is the radius of curvature.

[0095] According to the above parameters, as Figures 5 - 7 shown, this lens can achieve a full-field MTF greater than 0.5 at 75 lp / mm, an optical total length less than 11 mm, a field of view angle greater than 80°, and the astigmatism is controlled within 0.1, and the geometric spot diagram is controlled within 42 um, meeting the imaging requirements of miniaturization, high precision, and high pixel count.

[0096] Example 3:

[0097] This lens is constructed with four lenses, including a negative refractive power concave-convex spherical glass lens (the first lens L1), a negative refractive power convex-concave spherical glass lens (the second lens L2), a positive refractive power biconvex spherical glass lens (the third lens L3), and a positive refractive power concave-convex spherical glass lens (the fourth lens L4) arranged in sequence along the light incident direction. The light passes through the first lens L1, the second lens L2, the aperture STO, the third lens L3, the fourth lens L4, and the filter IR in sequence to reach the image plane IMA. The optical parameters of each lens are as shown in Table 5 below:

[0098] Table 5

[0099]

[0100] Furthermore, the relevant parameters of the lens are as shown in Table 6 below:

[0101] Table 6

[0102] f TTL DFOV f1 f2 f3 f4 3.56 10.79 82° -10.02 -20.55 2.69 125.8

[0103] In the above table, Nd is the refractive index, vd is the Abbe number, and the R value is the radius of curvature.

[0104] According to the above parameters, as Figures 8 - 10 shown, this lens can achieve a full-field MTF greater than 0.3 at 75 lp / mm, an optical total length less than 11 mm, a field of view angle greater than 80°, and the astigmatism is controlled within 0.1, and the geometric spot diagram is controlled within 42 um, meeting the imaging requirements of miniaturization, high precision, and high pixel count.

[0105] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0106] The above-described embodiments only represent relatively specific and detailed embodiments of the present application, but should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An anti-fatigue driving module lens, characterized in that: The anti-fatigue driving module lens comprises a first lens (L1), a second lens (L2), a third lens (L3) and a fourth lens (L4) which are sequentially arranged along the incident direction of light, wherein: The first lens (L1) is a concave-convex spherical lens with negative optical power; The second lens (L2) is a convex-concave spherical lens with negative optical power; The third lens (L3) is a biconvex spherical lens with positive power; The fourth lens (L4) is a concave-convex spherical lens with positive refractive power; And the following conditions are met: 2.05 <f2 / f1<2.34;39.19<f4 / f3<90.8; Wherein, f1 is the focal length of the first lens (L1), f2 is the focal length of the second lens (L2), f3 is the focal length of the third lens (L3), and f4 is the focal length of the fourth lens (L4), and the unit is mm.

2. The anti-fatigue driving module lens according to claim 1, characterized in that: The anti-fatigue driving module lens also meets the following conditions: -4.7 <L1R1<-4.3;-10.92<L1R2<-10.3;3<L2R1<3.2;2.1<L2R2<2.4; 4.1 <L3R1<4.4;-4.97<L3R2<-4.825;-2.8<L4R1<-2.6;-3.26<L4R2<-3.1; Wherein, L1R1 is the curvature radius of the object side mirror surface of the first lens (L1), L1R2 is the curvature radius of the image side mirror surface of the first lens (L1), L2R1 is the curvature radius of the object side mirror surface of the second lens (L2), L2R2 is the curvature radius of the image side mirror surface of the second lens (L2), L3R1 is the curvature radius of the object side mirror surface of the third lens (L3), L3R2 is the curvature radius of the image side mirror surface of the third lens (L3), L4R1 is the curvature radius of the object side mirror surface of the fourth lens (L4), and L4R2 is the curvature radius of the image side mirror surface of the fourth lens (L4), and the unit is mm.

3. The anti-fatigue driving module lens according to claim 1, characterized in that: The focal length ranges of the lenses are as follows: -10.1 <f1<-9.4;-22<f2<-19.8;2.64<f3<2.7;100<f4<245。 4. The anti-fatigue driving module lens according to claim 1, characterized in that: The refractive index Nd1 of the first lens (L1) satisfies: 1.8 <Nd1<2.0,25<vd1<35;1.55<Nd2<1.7,33<vd2<40; 1.85 <Nd3<1.95,30<vd3<40;1.85<Nd4<1.95,30<vd4<40; Wherein, Nd1 is the refractive index of the first lens (L1), vd1 is the Abbe number of the first lens (L1), Nd2 is the refractive index of the second lens (L2), vd2 is the Abbe number of the second lens (L2), Nd3 is the refractive index of the third lens (L3), vd3 is the Abbe number of the third lens (L3), Nd4 is the refractive index of the fourth lens (L4), and vd4 is the Abbe number of the fourth lens (L4).

5. The anti-fatigue driving module lens according to claim 1, characterized in that: The total optical length TTL and field of view DFOV of the anti-fatigue driving module lens satisfy the following requirements: TTL≤11mm, DFOV≥80°.

6. The anti-fatigue driving module lens according to claim 1, characterized in that: The first lens (L1), the second lens (L2), the third lens (L3) and the fourth lens (L4) are all glass spherical lenses.

7. The anti-fatigue driving module lens according to claim 1, characterized in that: The anti-fatigue driving module lens also includes an aperture (STO), and the aperture (STO) is located between the second lens (L2) and the third lens (L3).

8. The anti-fatigue driving module lens according to claim 1, characterized in that: The anti-fatigue driving module lens also includes an optical filter (IR), and the optical filter (IR) is located on the image side of the fourth lens (L4).

9. The anti-fatigue driving module lens according to claim 8, characterized in that: The anti-fatigue driving module lens also meets the following conditions: 0.85 <D1<0.87;1.9<D2<2.2;0.7<D3<0.85;0.42<D4<0.44; 0.7<D5<0.86； 0.3 <D6<0.33;1.1<D7<1.2;4.3<D8<4.5; Wherein, D1 is the thickness of the first lens (L1), D2 is the air gap between the first lens (L1) and the second lens (L2), D3 is the thickness of the second lens (L2), D4 is the air gap between the second lens (L2) and the third lens (L3), D5 is the thickness of the third lens (L3), D6 is the air gap between the third lens (L3) and the fourth lens (L4), D7 is the thickness of the fourth lens (L4), and D8 is the air gap between the fourth lens (L4) and the filter (IR), and the unit is mm.

10. The anti-fatigue driving module lens according to claim 1, characterized in that: The focal length f of the anti-fatigue driving module lens satisfies: 3.5≤f≤3.6, unit: mm.

Images