Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel, and a lens group and a plurality of spacing elements which are accommodated in the lens barrel, the lens group comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from the object side surface to the image side surface along the optical axis; each lens is provided with an object side surface facing one side of a shot object and an image side surface facing one side of an imaging surface, and an air gap is formed between the adjacent lenses; the plurality of spacing elements comprise a second spacing element which is arranged on the image side surface of the second lens and is in contact with the image side surface of the second lens and a third spacing element which is arranged on the image side surface of the third lens and is in contact with the image side surface of the third lens; the optical imaging lens satisfies the following conditions: 7.90 < CP3 / (T34 * 10) < 14.90; d3s / (CT3 + CT4) is more than 1.60 and less than 1.80.

Description

Technical Field

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

[0002] With the development of smart devices, drones, robotic vacuum cleaners, and autonomous vehicles are gaining increasing popularity. Optical imaging lenses, as a crucial component of radar detection in these smart devices, directly affect laser emission, reception, and detection accuracy. As products iterate and upgrade, higher demands are being placed on LiDAR lenses. Common LiDAR lenses still face many challenges, such as significant image quality variations due to temperature, the need for larger lens sizes, and difficulties in post-processing image processing.

[0003] Existing four-element glass-plastic hybrid optical systems are prone to problems such as large aberrations and unfocused dot patterns at room temperature during temperature drift correction, resulting in poor image clarity and affecting the optical performance of the imaging lens. Summary of the Invention

[0004] This application provides an optical imaging lens, including a lens barrel and a lens group and a plurality of spacer elements housed within the lens barrel; the lens group includes a first lens, a second lens, a third lens, and a fourth lens arranged sequentially along the optical axis from the object-side surface to the image-side surface; each lens has an object-side surface facing the subject and an image-side surface facing the imaging plane, and there is an air gap between adjacent lenses; the plurality of spacer elements includes: a second spacer element placed on and in contact with the image-side surface of the second lens, and a spacer element placed on and in contact with the image-side surface of the third lens. A third spacer element that contacts the image-side surface of the third lens; the optical imaging lens satisfies: 7.90 < CP3 / (T34×10) < 14.90; 1.60 < D3s / (CT3+CT4) < 1.80; where CP3 is the maximum thickness of the third spacer element along the optical axis, T34 is the air gap between the third lens and the fourth lens along the optical axis, D3s is the outer diameter of the plane perpendicular to the optical axis on the image-side surface of the third spacer element, CT3 is the center thickness of the third lens, and CT4 is the center thickness of the fourth lens.

[0005] According to some embodiments of this application, the optical imaging lens also satisfies: 1.00 < d3s / (DT32 + DT41) < 1.10; where d3s is the inner diameter of the plane perpendicular to the optical axis of the object side of the third spacer element, DT32 is the maximum effective radius of the image side of the third lens, and DT41 is the maximum effective radius of the object side of the fourth lens.

[0006] According to some embodiments of this application, the optical imaging lens also satisfies: 4.90≤D3s / |SAG32|<5.45; where D3s is the outer diameter of the plane perpendicular to the optical axis of the object side of the third spacer element, and SAG32 is the axial displacement between the intersection of the image side of the third lens and the optical axis and the vertex of the effective radius of the image side of the third lens.

[0007] According to some embodiments of this application, the optical imaging lens also satisfies: 0.10 < EP23 / (T23+CT3) ≤ 0.55; where EP23 is the distance between the image side of the second spacer element and the object side of the third spacer element along the optical axis, T23 is the air gap between the second lens and the third lens along the optical axis, and CT3 is the center thickness of the third lens.

[0008] According to some embodiments of this application, the optical imaging lens also satisfies: 0.20 < d2m / R5 < 0.45; where d2m is the inner diameter of the plane perpendicular to the optical axis of the image side of the second spacer element, R5 is the radius of curvature of the object side of the third lens, and R6 is the radius of curvature of the image side of the third lens.

[0009] According to some embodiments of this application, the optical imaging lens also satisfies: 0.05≤(d3s-d2m) / f3<0.70; where d3s is the inner diameter of the plane perpendicular to the optical axis on the object side of the third spacer element, d2m is the inner diameter of the plane perpendicular to the optical axis on the image side of the second spacer element, and f3 is the effective focal length of the third lens.

[0010] According to some embodiments of this application, the optical imaging lens also satisfies: 1.20 < (d3m - DT41) / DT42 < 1.40; where d3m is the inner diameter of the plane perpendicular to the optical axis on the image side of the third spacer element, DT41 is the maximum effective radius of the object side of the fourth lens, and DT42 is the maximum effective radius of the image side of the fourth lens.

[0011] According to some embodiments of this application, the optical imaging lens further satisfies the following: the materials used for the third lens and the fourth lens are both glass, and satisfy: 0 < CP2 × 10 / (R5 × N3) < 0.90, 0.40 < CP3 / (R7 × N4) ≤ 0.55; where CP2 is the maximum thickness of the second spacer element along the optical axis, CP3 is the maximum thickness of the third spacer element along the optical axis, R5 is the radius of curvature of the object side of the third lens, R7 is the radius of curvature of the object side of the fourth lens, N3 is the refractive index of the third lens, and N4 is the refractive index of the fourth lens.

[0012] According to some embodiments of this application, the optical imaging lens also satisfies: 0.80 < ET4 / SAG41 < 1.25; where ET4 is the edge thickness of the fourth lens, and SAG41 is the axial displacement between the intersection of the object side of the fourth lens and the optical axis and the vertex of the effective radius of the object side of the fourth lens.

[0013] According to some embodiments of this application, the optical imaging lens also satisfies: 0.15≤(D3m-d3m) / R7<0.3; where D3m is the outer diameter of the plane perpendicular to the optical axis of the image side of the third spacer element, d3m is the inner diameter of the plane perpendicular to the optical axis of the image side of the third spacer element, and R7 is the radius of curvature of the object side of the fourth lens.

[0014] According to some embodiments of this application, the optical imaging lens also satisfies: -5.45 < f4 / (CP3+CT4) < -4.70; where f4 is the effective focal length of the fourth lens, CP3 is the maximum thickness of the third spacer element along the optical axis, and CT4 is the center thickness of the fourth lens.

[0015] According to some embodiments of this application, the optical imaging lens also satisfies: 2.85 < L / (D0m-d0s) < 3.50; where L is the maximum height of the lens barrel, D0m is the outer diameter of the image side of the lens barrel perpendicular to the optical axis, and d0s is the inner diameter of the object side of the lens barrel perpendicular to the optical axis.

[0016] According to some embodiments of this application, the optical imaging lens also satisfies: 1.45≤L / TD<1.50; where L is the maximum height of the lens barrel, and TD is the distance between the object side of the first lens and the image side of the fourth lens along the optical axis.

[0017] According to some embodiments of this application, the optical imaging lens also satisfies: 1.70 < D0m / (DT11+DT42) < 1.80; where D0m is the outer diameter of the plane perpendicular to the optical axis on the image side of the lens barrel, DT11 is the maximum effective radius of the object side of the first lens, and DT42 is the maximum effective radius of the image side of the fourth lens.

[0018] In summary, this application provides an optical imaging lens. To ensure the rationality of the internal structural layout between the third and fourth lenses of the lidar lens, and thus improve the lens assembly stability, it is necessary to constrain the ratio of the maximum thickness of the third spacer element along the optical axis to the air gap between the third and fourth lenses along the optical axis to satisfy 7.90 < CP3 / (T34×10) < 14.90. Simultaneously, under this condition, the third and fourth lenses will exhibit significant aberrations and a scattered dot pattern at room temperature during temperature drift correction. To improve this problem, by controlling... The ratio of the outer diameter of the plane perpendicular to the optical axis on the side of the third spacer element to the sum of the thicknesses of the centers of the third and fourth lenses satisfies 1.60 < D3s / (CT3+CT4) < 1.80. This reasonable ratio can optimize the incident angle of light on the surfaces of the third and fourth lenses while ensuring the feasibility of forming the third and fourth lenses, making the transition of light between the third and fourth lenses as smooth as possible. This can effectively improve the problem of large aberrations and scattered dot patterns in the third and fourth lenses of the lidar lens of this application at room temperature, and make the image information received by the lens more comprehensive and clear. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of some structural parameters of an optical imaging lens according to one embodiment of this application;

[0020] Figure 2 This is a schematic diagram of another part of the structural parameters of an optical imaging lens according to one embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application;

[0022] Figure 4 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application;

[0023] Figure 5 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application;

[0024] Figure 6A A schematic diagram of the on-axis chromatic aberration curves of the optical imaging lenses according to the above-described embodiments one, two, and three of this application is shown.

[0025] Figure 6B A schematic diagram of the astigmatism curves of the optical imaging lenses according to the above-described Embodiment 1, Embodiment 2 and Embodiment 3 of this application is shown.

[0026] Figure 6C The diagram shows the distortion curves of the optical imaging lenses according to the above-described embodiments one, two, and three of this application.

[0027] Figure 6D A schematic diagram of the magnification chromatic aberration curves of the optical imaging lenses according to the above-described embodiments one, two, and three of this application is shown.

[0028] Figure 7 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application;

[0029] Figure 8 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application;

[0030] Figure 9 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment Six of this application;

[0031] Figure 10A A schematic diagram of the on-axis chromatic aberration curves of the optical imaging lenses according to Embodiments 4, 5 and 6 of this application is shown.

[0032] Figure 10B A schematic diagram of the astigmatism curves of the optical imaging lenses according to Embodiments 4, 5 and 6 of this application is shown.

[0033] Figure 10C A schematic diagram of the distortion curves of the optical imaging lenses according to Embodiments 4, 5 and 6 of this application is shown.

[0034] Figure 10D A schematic diagram of the magnification chromatic aberration curves of the optical imaging lenses according to Embodiments 4, 5 and 6 of this application is shown.

[0035] Figure 11 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment Seven of this application;

[0036] Figure 12 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application;

[0037] Figure 13 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment Nine of this application;

[0038] Figure 14A A schematic diagram of the on-axis chromatic aberration curve of the optical imaging lens according to Embodiments 7, 8 and 9 of this application is shown.

[0039] Figure 14B A schematic diagram of the astigmatism curves of the optical imaging lenses according to Embodiments 7, 8 and 9 of this application is shown.

[0040] Figure 14C A schematic diagram of the distortion curves of the optical imaging lenses according to Embodiments 7, 8 and 9 of this application is shown.

[0041] Figure 14D A schematic diagram of the magnification chromatic aberration curves of the optical imaging lenses according to Embodiments 7, 8, and 9 of this application is shown.

[0042] Figure 15 A point plot is shown when the optical imaging lens satisfies CP3 / (T34×10)=14.78 and D3s / (CT3+CT4)=1.78;

[0043] Figure 16 A point plot is shown when the optical imaging lens satisfies CP3 / (T34×10)=14.78 and D3s / (CT3+CT4)=1.3;

[0044] Figure 17 A point plot is shown when the optical imaging lens satisfies CP3 / (T34×10)=14.78 and D3s / (CT3+CT4)=2.1. Detailed Implementation

[0045] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0046] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0047] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0048] In this paper, the paraxial region refers to the area near the optical axis. If the lens surface is convex and its location is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and its location is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined by the sign of the R value (R refers to the radius of curvature of the paraxial region). In this paper, the surface of each lens closest to the subject is called the object-side surface, and the surface of each lens closest to the imaging plane is called the image-side surface. For the object-side surface, when the R value is positive, it is considered convex, and when the R value is negative, it is considered concave; for the image-side surface, when the R value is positive, it is considered concave, and when the R value is negative, it is considered convex.

[0049] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0050] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The following embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be pointed out that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0052] According to one aspect of this application, such as Figure 1 and Figure 2As shown, one embodiment of this application provides an optical imaging lens, including a lens barrel and a lens group and a plurality of spacer elements housed within the lens barrel; the lens group includes a first lens, a second lens, a third lens, and a fourth lens arranged sequentially along the optical axis from the object-side side to the image-side side; each lens has an object-side side facing the subject and an image-side side facing the imaging plane, and there is an air gap between adjacent lenses; the plurality of spacer elements include a second spacer element placed on the image-side side of the second lens and in contact with the image-side side of the second lens, and a spacer element placed on the third lens. The third spacer element is a third spacer element that is on the image side and in contact with the image side of the third lens; the optical imaging lens satisfies: 7.90 < CP3 / (T34×10) < 14.90; 1.60 < D3s / (CT3+CT4) < 1.80; where CP3 is the maximum thickness of the third spacer element along the optical axis, T34 is the air gap between the third lens and the fourth lens along the optical axis, D3s is the outer diameter of the plane perpendicular to the optical axis on the image side of the third spacer element, CT3 is the center thickness of the third lens, and CT4 is the center thickness of the fourth lens.

[0053] In order to ensure the rationality of the internal structural layout between the third and fourth lenses of the lidar lens and thus improve the stability of the lens assembly, the ratio of the maximum thickness of the third spacer element along the optical axis to the air gap between the third and fourth lenses along the optical axis needs to satisfy 7.90 < CP3 / (T34×10) < 14.90. At the same time, under this condition, the third and fourth lenses will have large aberrations and scattered dot patterns at room temperature during the temperature drift correction process. In order to improve this problem, the ratio of the outer diameter of the plane perpendicular to the optical axis of the third spacer element to the sum of the center thicknesses of the third and fourth lenses is controlled to satisfy 1.60 < D3s / (CT3+CT4) < 1.80. The above reasonable ratio can optimize the incident angle of light on the surface of the third and fourth lenses while ensuring the feasibility of the third and fourth lenses forming, so that the light transition in the third and fourth lenses is as smooth as possible. This can effectively improve the problem of large aberrations and scattered dot patterns of the third and fourth lenses of the lidar lens of this application at room temperature, and make the image information received by the lens more comprehensive and clear.

[0054] Figure 15 The diagram shows the dot plot of the optical imaging lens when CP3 / (T34×10)=14.78 and D3s / (CT3+CT4)=1.78. The dot plot shows that the light spots are relatively concentrated, indicating that when the optical imaging lens meets the constraints of 7.90<CP3 / (T34×10)<14.90; 1.60<D3s / (CT3+CT4)<1.80, the aberrations are small, the imaging is clear, and the optical performance of the optical imaging lens is good.

[0055] Figure 16 The diagram shows the spot pattern of the optical imaging lens when CP3 / (T34×10)=14.78 and D3s / (CT3+CT4)=1.3. The spot pattern shows divergence, indicating that when the optical imaging lens exceeds the lower limit of 1.60<D3s / (CT3+CT4)<1.80 while satisfying 7.90<CP3 / (T34×10)<14.90, the off-axis aberration of the lens increases, the image is not clear, and the optical performance of the optical imaging lens is poor.

[0056] Figure 17 The diagram shows the dot plot of the optical imaging lens when CP3 / (T34×10)=14.78 and D3s / (CT3+CT4)=2.1. The dot plot shows that the spot area increases and the spot diverges, indicating that when the optical imaging lens exceeds the upper limit of 1.60<D3s / (CT3+CT4)<1.80 under the premise of 7.90<CP3 / (T34×10)<14.90, the edge light rays are more divergent, the aberration is more serious, the image is not clear, and the optical performance of the optical imaging lens is poor.

[0057] It is worth noting that the dot pattern in this application is a light spot formed by the convergence of three wavelengths of light on the image plane after passing through the optical system. The concentration of the dot pattern (light spot) indicates that the system has good aberrations. Four image planes were captured, specifically including: 0 image height, 0.5 image height, 0.8 image height, and 1 image height.

[0058] According to some embodiments of this application, the optical imaging lens also satisfies: 1.00 < d3s / (DT32+DT41) < 1.10; where d3s is the inner diameter of the plane perpendicular to the optical axis of the third spacer element, DT32 is the maximum effective radius of the image side of the third lens, and DT41 is the maximum effective radius of the object side of the fourth lens. By constraining the ratio of the inner diameter of the plane perpendicular to the optical axis of the third spacer element to the sum of the maximum effective radii of the image side of the third lens and the maximum effective radii of the object side of the fourth lens, the emitted light from the image side of the third lens can be effectively intercepted, avoiding light leakage and improving the imaging quality of the system. Furthermore, by rationally setting the third spacer element, the spatial arrangement between the third and fourth lenses can be optimized, thereby improving the assembly stability of the optical system.

[0059] According to some embodiments of this application, the optical imaging lens also satisfies: 4.90 ≤ D3s / |SAG32| < 5.45; where D3s is the outer diameter of the plane perpendicular to the optical axis of the third spacer element, and SAG32 is the axial displacement between the intersection of the image-side surface of the third lens and the optical axis and the vertex of the effective radius of the image-side surface of the third lens. By constraining the ratio of the outer diameter of the plane perpendicular to the optical axis of the third spacer element to the axial displacement between the intersection of the image-side surface of the third lens and the optical axis and the vertex of the effective radius of the image-side surface of the third lens, the thickness ratio of the third lens can be effectively controlled, avoiding an excessively large thickness ratio, which is beneficial to the lens forming and processing. At the same time, the above condition can effectively control the external dimensions of the third lens, meeting the requirements of lens miniaturization design.

[0060] According to some embodiments of this application, the optical imaging lens further satisfies: 0.10 < EP23 / (T23+CT3) ≤ 0.55; where EP23 is the distance between the image-side surface of the second spacer element and the object-side surface of the third spacer element along the optical axis, T23 is the air gap between the second lens and the third lens along the optical axis, and CT3 is the center thickness of the third lens. By controlling the ratio of the distance between the image-side surface of the second spacer element and the object-side surface of the third spacer element along the optical axis to the sum of the air gap between the second lens and the third lens along the optical axis and the center thickness of the third lens, it can be ensured that light can propagate at a more ideal angle and path between the second lens, the third lens, and the second and third spacers, which helps to reduce the refraction deviation and scattering of light, and enables the light to be focused and imaged more effectively, thereby improving the imaging quality of the optical system.

[0061] According to some embodiments of this application, the optical imaging lens also satisfies: 0.20 < d²m / R₅ < 0.45; where d²m is the inner diameter of the plane perpendicular to the optical axis of the image-side surface of the second spacer element, R₅ is the radius of curvature of the object-side surface of the third lens, and R₆ is the radius of curvature of the image-side surface of the third lens. By controlling the ratio of the inner diameter of the plane perpendicular to the optical axis of the image-side surface of the second spacer element to the radius of curvature of the object-side surface of the third lens, the shape and curvature of the third lens can be effectively constrained, which helps to reduce the lens sensitivity of the third lens and thus improve the lens assembly yield. If the ratio of d²m / R₅ is too large or too small, it will lead to unreasonable shape or size of the third lens, making the third lens more sensitive to factors such as processing accuracy and assembly errors, which can easily affect the performance of the optical system.

[0062] According to some embodiments of this application, the optical imaging lens also satisfies: 0.05 ≤ (d3s - d2m) / f3 < 0.70; where d3s is the inner diameter of the plane perpendicular to the optical axis on the object side of the third spacer element, d2m is the inner diameter of the plane perpendicular to the optical axis on the image side of the second spacer element, and f3 is the effective focal length of the third lens. By controlling the ratio of the difference between the inner diameter of the plane perpendicular to the optical axis on the object side of the third spacer element and the inner diameter of the plane perpendicular to the optical axis on the image side of the second spacer element to the effective focal length of the third lens, the second and third spacer elements can be rationally set, effectively blocking stray light generated by the third lens mechanism. Furthermore, combined with the focal length of the third lens, the degree of light deflection at the third lens can be controlled, achieving the effect of correcting field curvature and astigmatism.

[0063] According to some embodiments of this application, the optical imaging lens also satisfies: 1.20 < (d3m - DT41) / DT42 < 1.40; where d3m is the inner diameter of the plane perpendicular to the optical axis of the image-side surface of the third spacer element, DT41 is the maximum effective radius of the object-side surface of the fourth lens, and DT42 is the maximum effective radius of the image-side surface of the fourth lens. By controlling the ratio of the difference between the inner diameter of the plane perpendicular to the optical axis of the image-side surface of the third spacer element and the maximum effective radius of the object-side surface of the fourth lens to the maximum effective radius of the image-side surface of the fourth lens, it is beneficial for the light to be incident on the image plane with a small CRA (principal ray angle) after passing through the fourth lens, ensuring compatibility with the chip. In addition, by controlling the above conditional expression, it is beneficial to reduce the assembly sensitivity of the fourth lens and improve the assembly yield of the optical system.

[0064] According to some embodiments of this application, the third lens and the fourth lens are both made of glass. The optical imaging lens also satisfies the following conditions: 0 < CP2 × 10 / (R5 × N3) < 0.90, 0.40 < CP3 / (R7 × N4) ≤ 0.55; where CP2 is the maximum thickness of the second spacer element along the optical axis, CP3 is the maximum thickness of the third spacer element along the optical axis, R5 is the radius of curvature of the object side of the third lens, R7 is the radius of curvature of the object side of the fourth lens, N3 is the refractive index of the third lens, and N4 is the refractive index of the fourth lens. By constraining 0 < CP2 × 10 / (R5 × N3) < 0.10 and 0.40 < CP3 / (R7 × N4) ≤ 0.55, the constraints on the materials and shapes of the third and fourth lenses effectively reduce the temperature drift of the third and fourth lenses while ensuring assembly stability, thus enabling the optical system to have better imaging quality when operating at high and low temperatures.

[0065] According to some embodiments of this application, the optical imaging lens also satisfies: 0.80 < ET4 / SAG41 < 1.25; where ET4 is the edge thickness of the fourth lens, and SAG41 is the axial displacement between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens. By controlling the ratio of the edge thickness of the fourth lens to the axial displacement between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens, it is not only beneficial to the forming and processing of the fourth lens, but also has a good correction effect on chip ghost images. The greater the curvature of the fourth lens, the stronger the chip ghost image energy. By constraining the above conditional expression, the overall imaging quality of the optical system can be effectively improved.

[0066] According to some embodiments of this application, the optical imaging lens also satisfies: 0.15 ≤ (D3m - d3m) / R7 < 0.3; where D3m is the outer diameter of the plane perpendicular to the optical axis of the image-side surface of the third spacer element, d3m is the inner diameter of the plane perpendicular to the optical axis of the image-side surface of the third spacer element, and R7 is the radius of curvature of the object-side surface of the fourth lens. By controlling the inner and outer diameters of the image-side surface of the third spacer element within a certain range, excess light emitted from the third lens can be blocked, improving the system's imaging quality. Simultaneously, by constraining the radius of curvature of the object-side surface of the fourth lens, light incident on the fourth lens can have a smaller angle of incidence, effectively correcting system aberrations and improving imaging resolution.

[0067] According to some embodiments of this application, the optical imaging lens also satisfies: -5.45 < f4 / (CP3+CT4) < -4.70; where f4 is the effective focal length of the fourth lens, CP3 is the maximum thickness of the third spacer element along the optical axis, and CT4 is the center thickness of the fourth lens. By controlling the ratio of the effective focal length of the fourth lens to the sum of the maximum thickness of the third spacer element along the optical axis and the center thickness of the fourth lens, on the one hand, it is beneficial to the reasonable axial setting of the third spacer element, which improves the assembly stability of the system while ensuring the lens processing and forming; on the other hand, combined with the control of the effective focal length of the fourth lens, it is beneficial to the reasonable allocation of the focal lengths of each lens in the system, ensuring that the system has a good temperature drift correction effect.

[0068] According to some embodiments of this application, the optical imaging lens also satisfies: 2.85 < L / (D0m - d0s) < 3.50; where L is the maximum height of the lens barrel, D0m is the outer diameter of the image-side plane of the lens barrel perpendicular to the optical axis, and d0s is the inner diameter of the object-side plane of the lens barrel perpendicular to the optical axis. By controlling the ratio of the maximum height of the lens barrel to the difference between the outer diameter of the image-side plane of the lens barrel perpendicular to the optical axis and the inner diameter of the object-side plane of the lens barrel perpendicular to the optical axis, on the one hand, the head and tail dimensions of the lens can be kept within the required range, ensuring the characteristics of a small head and small CRA (chief ray angle) of the lens; on the other hand, it is also beneficial to make the wall thickness of the lens barrel more uniform while meeting the molding requirements, resulting in lower molding stress of the lens barrel.

[0069] According to some embodiments of this application, the optical imaging lens also satisfies: 1.45 ≤ L / TD < 1.50; where L is the maximum height of the lens barrel, and TD is the distance between the object side of the first lens and the image side of the fourth lens along the optical axis. By controlling the ratio of the maximum height of the lens barrel to the distance between the object side of the first lens and the image side of the fourth lens along the optical axis, the overall axial and longitudinal length of the system structure can be effectively controlled, ensuring the lens's small size advantage.

[0070] According to some embodiments of this application, the optical imaging lens also satisfies: 1.70 < D0m / (DT11+DT42) < 1.80; where D0m is the outer diameter of the plane perpendicular to the optical axis on the image side of the lens barrel, DT11 is the maximum effective radius of the object side of the first lens, and DT42 is the maximum effective radius of the image side of the fourth lens. By controlling the ratio of the outer diameter of the plane perpendicular to the optical axis on the image side of the lens barrel to the sum of the maximum effective radius of the object side of the first lens and the maximum effective radius of the image side of the fourth lens, the radial step difference between the fourth lens and the lens barrel can be reasonably controlled while ensuring the small head characteristic of the lens, so as to prevent poor assembly stability due to excessive step difference between the lens and the support component during the assembly process.

[0071] It should be noted that those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of spacers constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification, and this application does not specifically limit this. For example, as needed, the optical imaging lens may also include other numbers of spacers than those described in the above embodiments.

[0072] The following describes in more detail, with reference to the accompanying drawings, some specific, but not limiting, embodiments of the above-described embodiments of this application. For ease of description, in the following embodiments, OBJ (not shown in the figures) represents the object plane of the optical imaging lens, STO (not shown in the figures) represents the surface of the aperture stop, S1 represents the object-side plane of the first lens E1, S2 represents the image-side plane of the first lens E1, S3 represents the object-side plane of the second lens E2, S4 represents the image-side plane of the second lens E2, S5 represents the object-side plane of the third lens E3, S6 represents the image-side plane of the third lens E3, S7 represents the object-side plane of the fourth lens E4, S8 represents the image-side plane of the fourth lens E4, S9 (not shown in the figures) represents the object-side plane of the first filter or the first protective glass, S10 (not shown in the figures) represents the image-side plane of the first filter or the first protective glass, S11 (not shown in the figures) represents the object-side plane of the second filter or the second protective glass, S12 (not shown in the figures) represents the image-side plane of the second filter or the second protective glass, and S13 (not shown in the figures) represents the receiving surface of the display chip.

[0073] Example 1

[0074] like Figure 3 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacers housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 arranged sequentially along the optical axis from the object side to the image side; the plurality of spacers include a first spacer P1 located on the image side of the first lens E1 and in contact with the image side S2 of the first lens E1, a second spacer P2 located on the image side of the second lens E2 and in contact with the image side S4 of the second lens E2, and a third spacer P3 located on the image side of the third lens E3 and in contact with the image side S6 of the third lens E3.

[0075] In this embodiment, the first lens E1 has positive optical power, and the object-side surface S1 of the first lens E1 is concave and the image-side surface S2 is convex; the second lens E2 has positive optical power, and the object-side surface S3 of the second lens E2 is convex and the image-side surface S4 is concave; the third lens E3 has positive optical power, and the object-side surface S5 of the third lens E3 is convex and the image-side surface S6 is convex; the fourth lens E4 has negative optical power, and the object-side surface S7 of the fourth lens E4 is convex and the image-side surface S8 is concave.

[0076] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of Embodiment 1, where the units of radius of curvature and thickness / distance are millimeters (mm).

[0077] Table 1

[0078]

[0079] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the fourth lens E4 are aspherical, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0080] ;

[0081] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspherical mirrors S1 to S8 in Example 1.

[0082] Table 2

[0083]

[0084] Example 2

[0085] like Figure 4 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacers housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 arranged sequentially along the optical axis from the object side to the image side; the plurality of spacers include a first spacer P1 located on the image side of the first lens E1 and in contact with the image side S2 of the first lens E1, a second spacer P2 located on the image side of the second lens E2 and in contact with the image side S4 of the second lens E2, and a third spacer P3 located on the image side of the third lens E3 and in contact with the image side S6 of the third lens E3.

[0086] It is worth noting that, compared with Embodiment 1 above, the optical imaging lens of Embodiment 2 has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment 2 is the same as Table 1, and the aspherical coefficient table is the same as Table 2. However, the optical imaging lens of Embodiment 2 has different structural parameters than the optical imaging lens of Embodiment 1 above. That is, the difference between Embodiment 2 and Embodiment 1 lies in the different dimensional values ​​of some structural parameters of the lens barrel P0 and the spacer element in the optical imaging lens. Specifically, the values ​​of each relevant structural parameter in Embodiment 2 are shown in Table 8 below.

[0087] Example 3

[0088] like Figure 5As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacers housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 arranged sequentially along the optical axis from the object side to the image side; the plurality of spacers include a first spacer P1 located on the image side of the first lens E1 and in contact with the image side S2 of the first lens E1, a second spacer P2 located on the image side of the second lens E2 and in contact with the image side S4 of the second lens E2, and a third spacer P3 located on the image side of the third lens E3 and in contact with the image side S6 of the third lens E3.

[0089] In this embodiment, the plurality of spacers also includes a second auxiliary spacer element P2b disposed on the image side of the second spacer element P2 and in contact with the image side of the second spacer element P2.

[0090] It is worth noting that, compared with Embodiment 1 above, the optical imaging lens of Embodiment 3 has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment 3 is the same as Table 1, and the aspherical coefficient table is the same as Table 2. However, the optical imaging lens of Embodiment 3 has different structural parameters than the optical imaging lens of Embodiment 1 above. That is, the difference between Embodiment 3 and Embodiment 1 is that the dimensional values ​​of some structural parameters of the lens barrel P0 and the spacer element in the optical imaging lens are different. Specifically, the values ​​of each relevant structural parameter in Embodiment 3 are shown in Table 8 below.

[0091] The on-axis chromatic aberration curves of the optical imaging lenses in Examples 1, 2, and 3 are as follows: Figure 6A As shown, this represents the degree of deviation of the focal point after light of different wavelengths passes through the optical imaging lens; the astigmatism curves of the optical imaging lenses in Embodiments 1, 2, and 3 are shown below. Figure 6B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane. The distortion curves of the optical imaging lenses in Embodiments 1, 2, and 3 are as follows: Figure 6C As shown, it represents the degree of image distortion. The magnification chromatic aberration curves of the optical imaging lenses in Embodiments 1, 2, and 3 are as follows: Figure 6D As shown, this represents the degree of deviation of light of different wavelengths on the image plane after passing through an optical imaging lens. According to... Figures 6A to 6D It can be seen that the optical imaging lenses in Embodiment 1, Embodiment 2 and Embodiment 3 can all achieve good imaging quality.

[0092] Example 4

[0093] like Figure 7As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacers housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 arranged sequentially along the optical axis from the object side to the image side; the plurality of spacers include a first spacer P1 located on the image side of the first lens E1 and in contact with the image side S2 of the first lens E1, a second spacer P2 located on the image side of the second lens E2 and in contact with the image side S4 of the second lens E2, and a third spacer P3 located on the image side of the third lens E3 and in contact with the image side S6 of the third lens E3.

[0094] In this embodiment, the first lens E1 has positive optical power, and the object-side surface S1 of the first lens E1 is convex and the image-side surface S2 is convex; the second lens E2 has negative optical power, and the object-side surface S3 of the second lens E2 is convex and the image-side surface S4 is concave; the third lens E3 has positive optical power, and the object-side surface S5 of the third lens E3 is convex and the image-side surface S6 is convex; the fourth lens E4 has negative optical power, and the object-side surface S7 of the fourth lens E4 is convex and the image-side surface S8 is concave.

[0095] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Embodiment 4, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0096] Table 3

[0097]

[0098] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the fourth lens E4 are aspherical, and the surface shape of each aspherical lens can be defined by the aspherical formula given in the above embodiment 1.

[0099] Table 4 below gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S1 to S8 in Example 4.

[0100] Table 4

[0101]

[0102] Example 5

[0103] like Figure 8As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacers housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3 and a fourth lens E4 arranged sequentially along the optical axis from the object side to the image side; the plurality of spacers include a first spacer P1 placed on the image side of the first lens E1 and in contact with the image side S2 of the first lens E1, a second spacer P2 placed on the image side of the second lens E2 and in contact with the image side S4 of the second lens E2, and a third spacer P3 placed on the image side of the third lens E3 and in contact with the image side S6 of the third lens E3.

[0104] In this embodiment, the plurality of spacers further includes a first auxiliary spacer P1b disposed on the image side of the first spacer P1 and in contact with the image side of the first spacer P1, and a second auxiliary spacer P2b disposed on the image side of the second spacer P2 and in contact with the image side of the second spacer P2.

[0105] It is worth noting that, compared with Embodiment 4 above, the optical imaging lens of Embodiment 5 has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment 5 is the same as Table 3, and the aspherical coefficient table is the same as Table 4. However, the optical imaging lens of Embodiment 5 has different structural parameters than the optical imaging lens of Embodiment 4 above. That is, the difference between Embodiment 5 and Embodiment 4 is that the dimensional values ​​of some structural parameters of the lens barrel P0 and multiple spacer elements in the optical imaging lens are different. Specifically, the values ​​of each relevant structural parameter in Embodiment 5 are shown in Table 8 below.

[0106] Example 6

[0107] like Figure 9 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacers housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 arranged sequentially along the optical axis from the object side to the image side; the plurality of spacers include a first spacer P1 located on the image side of the first lens E1 and in contact with the image side S2 of the first lens E1, a second spacer P2 located on the image side of the second lens E2 and in contact with the image side S4 of the second lens E2, and a third spacer P3 located on the image side of the third lens E3 and in contact with the image side S6 of the third lens E3.

[0108] It is worth noting that, compared with Embodiment 4 above, the optical imaging lens of Embodiment 6 has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment 6 is the same as Table 3, and the aspherical coefficient table is the same as Table 4. However, the optical imaging lens of Embodiment 6 has different structural parameters than the optical imaging lens of Embodiment 4 above. That is, the difference between Embodiment 6 and Embodiment 4 is that the dimensional values ​​of some structural parameters of the lens barrel P0 and multiple spacer elements in the optical imaging lens are different. Specifically, the values ​​of each relevant structural parameter in Embodiment 6 are shown in Table 8 below.

[0109] The on-axis chromatic aberration curves of the optical imaging lenses in Examples 4, 5, and 6 are as follows: Figure 10A As shown, this represents the degree of deviation of the focal point after light of different wavelengths passes through the optical imaging lens; the astigmatism curves of the optical imaging lenses in Examples 4, 5, and 6 are shown below. Figure 10B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curves of the optical imaging lenses in Examples 4, 5, and 6 are as follows. Figure 10C As shown, it represents the degree of distortion in the actual image; the magnification chromatic aberration curves of the optical imaging lenses in Examples 4, 5, and 6 are as follows. Figure 10D As shown, this represents the degree of deviation of light of different wavelengths on the image plane after passing through an optical imaging lens. According to... Figures 10A to 10D It can be seen that the optical imaging lenses in Embodiments 4, 5 and 6 can all achieve good imaging quality.

[0110] Example 7

[0111] like Figure 11 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacers housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 arranged sequentially along the optical axis from the object side to the image side; the plurality of spacers include a first spacer P1 located on the image side of the first lens E1 and in contact with the image side S2 of the first lens E1, a second spacer P2 located on the image side of the second lens E2 and in contact with the image side S4 of the second lens E2, and a third spacer P3 located on the image side of the third lens E3 and in contact with the image side S6 of the third lens E3.

[0112] In this embodiment, the first lens E1 has positive optical power, and the object-side surface S1 of the first lens E1 is convex and the image-side surface S2 is concave; the second lens E2 has positive optical power, and the object-side surface S3 of the second lens E2 is convex and the image-side surface S4 is concave; the third lens E3 has positive optical power, and the object-side surface S5 of the third lens E3 is convex and the image-side surface S6 is convex; the fourth lens E4 has negative optical power, and the object-side surface S7 of the fourth lens E4 is convex and the image-side surface S8 is concave.

[0113] In addition, Table 5 shows the basic optical parameters of the optical imaging lens of Embodiment 7, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0114] Table 5

[0115]

[0116] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the fourth lens E4 are aspherical, and the surface shape of each aspherical lens can be defined by the aspherical formula given in the above embodiment 1.

[0117] Table 6 below shows the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S1 to S8 in Example 7.

[0118] Table 6

[0119]

[0120] Example 8

[0121] like Figure 12 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacers housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 arranged sequentially along the optical axis from the object side to the image side; the plurality of spacers include a first spacer P1 located on the image side of the first lens E1 and in contact with the image side S2 of the first lens E1, a second spacer P2 located on the image side of the second lens E2 and in contact with the image side S4 of the second lens E2, and a third spacer P3 located on the image side of the third lens E3 and in contact with the image side S6 of the third lens E3.

[0122] In this embodiment, the plurality of spacers further includes a second auxiliary spacer P2b disposed on the image side of the second spacer P2 and in contact with the image side of the second spacer P2.

[0123] It is worth noting that, compared with Embodiment Seven above, the optical imaging lens of Embodiment Eight has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment Eight is the same as Table 5, and the aspherical coefficient table is the same as Table 6. However, the optical imaging lens of Embodiment Eight has different structural parameters than the optical imaging lens of Embodiment Seven above. That is, the difference between Embodiment Eight and Embodiment Seven above lies in the different dimensional values ​​of some structural parameters of the lens barrel and multiple spacer elements in the optical imaging lens. Specifically, the values ​​of each relevant structural parameter in Embodiment Eight are shown in Table 8 below.

[0124] Example 9

[0125] like Figure 13 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacers housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 arranged sequentially along the optical axis from the object side to the image side; the plurality of spacers include a first spacer P1 located on the image side of the first lens E1 and in contact with the image side S2 of the first lens E1, a second spacer P2 located on the image side of the second lens E2 and in contact with the image side S4 of the second lens E2, and a third spacer P3 located on the image side of the third lens E3 and in contact with the image side S6 of the third lens E3.

[0126] It is worth noting that, compared with Embodiment 7 above, the optical imaging lens of Embodiment 9 has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment 9 is the same as Table 5, and the aspherical coefficient table is the same as Table 6. However, the optical imaging lens of Embodiment 9 has different structural parameters than the optical imaging lens of Embodiment 7 above. That is, the difference between Embodiment 9 and Embodiment 7 is that the dimensional values ​​of some structural parameters of the lens barrel and multiple spacer elements in the optical imaging lens are different. Specifically, the values ​​of each relevant structural parameter in Embodiment 9 are shown in Table 8 below.

[0127] The on-axis chromatic aberration curves of the optical imaging lenses in Examples 7, 8, and 9 are as follows: Figure 14A As shown, this represents the degree of deviation of the focal point after light of different wavelengths passes through the optical imaging lens; the astigmatism curves of the optical imaging lenses in Examples 7, 8, and 9 are shown below. Figure 14B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curves of the optical imaging lenses in Embodiments 7, 8, and 9 are as follows. Figure 14C As shown, it represents the degree of distortion in the actual image; the magnification chromatic aberration curves of the optical imaging lenses in Examples 7, 8, and 9 are as follows. Figure 14DAs shown, this represents the degree of deviation of light of different wavelengths on the image plane after passing through an optical imaging lens. According to... Figures 14A to 14D It can be seen that the optical imaging lenses in Embodiments 7, 8 and 9 can all achieve good imaging quality.

[0128] In summary, in Embodiments 1 to 9, the maximum field of view (FOV) of the optical imaging lens, the effective focal lengths (f1 to f4) of the first lens E1 to the fourth lens E4 in the optical imaging lens, the effective focal length (f) of the optical imaging lens, the maximum effective radius (DT11) of the object side of the first lens E1, the maximum effective radius (DT32) of the image side of the third lens E3, the maximum effective radius (DT41) of the object side of the fourth lens E4, the maximum effective radius (DT42) of the image side of the fourth lens E4, the edge thickness (ET4) of the fourth lens E4, the axial displacement (SAG32) between the intersection of the image side of the third lens E3 and the optical axis and the vertex of the effective radius of the image side of the third lens E3, and the axial displacement (SAG41) between the intersection of the object side of the fourth lens E4 and the optical axis and the vertex of the effective radius of the object side of the fourth lens E4 are shown in Table 7 below.

[0129] Table 7

[0130]

[0131] Furthermore, the structural parameters of the optical imaging lenses in Embodiments 1 to 9 include: the inner diameter d2m of the plane perpendicular to the optical axis of the image side of the second spacer element P2; the inner diameter d3s of the plane perpendicular to the optical axis of the object side of the third spacer element P3; the inner diameter d3m of the plane perpendicular to the optical axis of the image side of the third spacer element P3; the outer diameter D3s of the plane perpendicular to the optical axis of the object side of the third spacer element P3; the outer diameter D3m of the plane perpendicular to the optical axis of the image side of the third spacer element P3; the inner diameter d0s of the plane perpendicular to the optical axis of the object side of the lens barrel P0; the outer diameter D0m of the plane perpendicular to the optical axis of the image side of the lens barrel P0; the maximum thickness CP2 of the second spacer element P2 along the optical axis; the distance EP23 between the image side of the second spacer element P2 and the object side of the third spacer element P3 along the optical axis; the maximum thickness CP3 of the third spacer element P3 along the optical axis; and the maximum height L of the lens barrel P0. Specific data are shown in Table 8 below.

[0132] Table 8

[0133]

[0134] In summary, the optical imaging lenses in Examples 1 to 9 satisfy the relationships shown in Table 9, as detailed in Table 9.

[0135] Table 9

[0136]

[0137] It is worth mentioning that, according to one aspect of this application, one embodiment of this application further provides a camera module, which may include the aforementioned optical imaging lens and a photosensitive element, wherein the photosensitive element is disposed on the image-side surface of the optical imaging lens for imaging. It is understood that the photosensitive element mentioned in this application may, but is not limited to, be implemented as a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) device, and this application will not elaborate further on this.

[0138] Furthermore, according to another aspect of this application, one embodiment of this application provides an electronic device that may include a camera module and a processor as described above. The camera module is communicatively connected to the processor for acquiring image data and inputting the image data into the processor for processing. It is understood that the electronic device mentioned in this application may, but is not limited to, a device such as a mobile phone equipped with the camera module, and this application will not elaborate further on this.

[0139] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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, they should be considered to be within the scope of this specification.

[0140] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An optical imaging lens, characterized in that, It includes a lens barrel and a lens assembly and multiple spacer elements housed within the lens barrel; The lens group includes a first lens, a second lens, a third lens, and a fourth lens arranged sequentially along the optical axis from the object side to the image side; each lens has an object side facing the subject and an image side facing the imaging plane, and there is an air gap between adjacent lenses; The plurality of spacers include: a second spacer disposed on the image-side surface of the second lens and in contact with the image-side surface of the second lens, and a third spacer disposed on the image-side surface of the third lens and in contact with the image-side surface of the third lens; The optical imaging lens satisfies the following conditions: 7.90 < CP3 / (T34×10) < 14.90; 1.60 < D3s / (CT3+CT4) < 1.80; Wherein, CP3 is the maximum thickness of the third spacer element along the optical axis, T34 is the air gap between the third lens and the fourth lens along the optical axis, D3s is the outer diameter of the plane perpendicular to the optical axis on the side of the third spacer element, CT3 is the center thickness of the third lens, and CT4 is the center thickness of the fourth lens.

2. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 1.00 < d3s / (DT32 + DT41) < 1.10; where d3s is the inner diameter of the plane perpendicular to the optical axis on the object side of the third spacer element, DT32 is the maximum effective radius of the image side of the third lens, and DT41 is the maximum effective radius of the object side of the fourth lens.

3. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 4.90≤D3s / |SAG32|<5.45; where D3s is the outer diameter of the plane perpendicular to the optical axis of the object side of the third spacer element, and SAG32 is the axial displacement between the intersection of the image side of the third lens and the optical axis and the vertex of the effective radius of the image side of the third lens.

4. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 0.10 < EP23 / (T23+CT3) ≤ 0.55; where EP23 is the distance between the image side of the second spacer element and the object side of the third spacer element along the optical axis, T23 is the air gap between the second lens and the third lens along the optical axis, and CT3 is the center thickness of the third lens.

5. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 0.20 < d2m / R5 < 0.45; where d2m is the inner diameter of the plane perpendicular to the optical axis of the image side of the second spacer element, R5 is the radius of curvature of the object side of the third lens, and R6 is the radius of curvature of the image side of the third lens.

6. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 0.05≤(d3s-d2m) / f3<0.70; where d3s is the inner diameter of the plane perpendicular to the optical axis on the object side of the third spacer element, d2m is the inner diameter of the plane perpendicular to the optical axis on the image side of the second spacer element, and f3 is the effective focal length of the third lens.

7. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 1.20 < (d3m - DT41) / DT42 < 1.40; where d3m is the inner diameter of the plane perpendicular to the optical axis on the image side of the third spacer element, DT41 is the maximum effective radius of the object side of the fourth lens, and DT42 is the maximum effective radius of the image side of the fourth lens.

8. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies the following: the materials used for the third lens and the fourth lens are both glass, and satisfy: 0 < CP2 × 10 / (R5 × N3) < 0.90, 0.40 < CP3 / (R7 × N4) ≤ 0.55; where CP2 is the maximum thickness of the second spacer element along the optical axis, CP3 is the maximum thickness of the third spacer element along the optical axis, R5 is the radius of curvature of the object side of the third lens, R7 is the radius of curvature of the object side of the fourth lens, N3 is the refractive index of the third lens, and N4 is the refractive index of the fourth lens.

9. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 0.80 < ET4 / SAG41 < 1.25; where ET4 is the edge thickness of the fourth lens, and SAG41 is the axial displacement between the intersection of the object side of the fourth lens and the optical axis and the vertex of the effective radius of the object side of the fourth lens.

10. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 0.15≤(D3m-d3m) / R7<0.3; where D3m is the outer diameter of the plane perpendicular to the optical axis of the image side of the third spacer element, d3m is the inner diameter of the plane perpendicular to the optical axis of the image side of the third spacer element, and R7 is the radius of curvature of the object side of the fourth lens.

11. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: -5.45 < f4 / (CP3+CT4) < -4.70; where f4 is the effective focal length of the fourth lens, CP3 is the maximum thickness of the third spacer element along the optical axis, and CT4 is the center thickness of the fourth lens.

12. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 2.85 < L / (D0m-d0s) < 3.50; where L is the maximum height of the lens barrel, D0m is the outer diameter of the image side of the lens barrel perpendicular to the optical axis, and d0s is the inner diameter of the object side of the lens barrel perpendicular to the optical axis.

13. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 1.45≤L / TD<1.50; where L is the maximum height of the lens barrel and TD is the distance between the object side of the first lens and the image side of the fourth lens along the optical axis.

14. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 1.70 < D0m / (DT11+DT42) < 1.80; where D0m is the outer diameter of the plane perpendicular to the optical axis on the image side of the lens barrel, DT11 is the maximum effective radius of the object side of the first lens, and DT42 is the maximum effective radius of the image side of the fourth lens.

Images