An optical imaging lens

Abstract

The present invention discloses an optical imaging lens. The optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative optical power, whose object side is concave; a second lens with a positive optical power, whose object side is convex and image side is convex; a third lens with a negative optical power, whose image side is concave; a fourth lens with a positive optical power, whose object side is convex and image side is concave. Wherein, half of the diagonal length of the effective pixel area on the imaging surface ImgH and the maximum field of view angle FOV of the optical imaging lens satisfy: 3.0 mm < ImgH × tan(1 / 2 × FOV) < 4.6 mm; the maximum field of view angle FOV of the optical imaging lens satisfies: 115° < FOV < 130°; half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfies: 2.0 mm < ImgH < 3.0 mm. The optical imaging lens provided by the present invention can greatly improve the FOV to a greater extent while maintaining the imaging quality, and maintain a smaller TTL, meeting the current mobile phone's demand for wide-angle shooting.

Description

Technical Field

[0001] The present invention belongs to the field of optical imaging, and in particular relates to an optical imaging lens comprising four lenses. Background Art

[0002] With the continuous development of the mobile phone market, the requirements for the imaging quality of mobile phone lenses are getting higher and higher. In order to realize different camera functions, the number of mobile phone camera modules is also gradually increasing. Triple-camera, quad-camera and other multi-camera mobile phones have become a trend. Taking the latest mobile phones on the market as an example, they are currently equipped with a wide-angle lens as a secondary camera to enable them to have more professional camera functions.

[0003] Therefore, how to improve FOV to a greater extent while maintaining improved image quality and maintaining a smaller TTL is currently a major research direction for wide-angle lenses. The purpose of this patent is to provide a 4P lens with the above characteristics to meet the current needs of mobile phones for wide-angle shooting. Summary of the invention

[0004] The present invention aims to provide an optical imaging lens composed of four lenses, which can improve the FOV to a greater extent while maintaining the imaging quality and maintain a small TTL, thereby meeting the current demand for wide-angle shooting on mobile phones.

[0005] One aspect of the present invention provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens having negative optical power, whose object-side surface is concave; a second lens having positive optical power, whose object-side surface is convex and whose image-side surface is convex; a third lens having negative optical power, whose image-side surface is concave; and a fourth lens having positive optical power, whose object-side surface is convex and whose image-side surface is concave.

[0006] Among them, half of the diagonal length of the effective pixel area on the imaging surface ImgH and the maximum field of view FOV of the optical imaging lens meet: 3.0mm <ImgH×tan(1 / 2×FOV)<4.6mm。

[0007] According to one embodiment of the present invention, the maximum field of view FOV of the optical imaging lens satisfies: 115° <FOV<130°。

[0008] According to one embodiment of the present invention, half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfies: 2.0 mm <ImgH<3.0mm。

[0009] According to one embodiment of the present invention, the effective focal length f1 of the first lens and the curvature radius R1 of the object side of the first lens satisfy: 0.7 <f1 / R1<1.8。

[0010] According to one embodiment of the present invention, the effective focal length f3 of the third lens and the effective focal length f2 of the second lens satisfy: -3.4 <f3 / f2<-1.4。

[0011] According to one embodiment of the present invention, a curvature radius R3 of the object side surface of the second lens and a curvature radius R4 of the image side surface of the second lens satisfy: 0.1<(R3+R4) / (R3-R4)<1.0.

[0012] According to one embodiment of the present invention, the curvature radius R8 of the image side surface of the fourth lens and the curvature radius R7 of the object side surface of the fourth lens satisfy: 0.8 <R8 / R7<1.6。

[0013] According to one embodiment of the present invention, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1.5 <f / EPD<2.5。

[0014] According to one embodiment of the present invention, the effective focal length f of the optical imaging lens and the air interval T12 between the first lens and the second lens on the optical axis satisfy: 1.5 <f / T12<2.5。

[0015] According to one embodiment of the present invention, the effective half-aperture DT11 of the object side of the first lens and the effective half-aperture DT12 of the image side of the first lens satisfy the following conditions: 1.5 <DT11 / DT12<2.1。

[0016] According to one embodiment of the present invention, the effective half-aperture DT42 of the image side surface of the fourth lens, the effective half-aperture DT21 of the object side surface of the second lens, and the effective half-aperture DT22 of the image side surface of the second lens satisfy: 1.2 <DT42 / (DT21+DT22)<1.8。

[0017] According to one embodiment of the present invention, the axial distance SL from the aperture to the imaging surface and the composite focal length f23 of the second and third lenses satisfy: 1.5 <SL / f23<2.3。

[0018] According to one embodiment of the present invention, a center thickness CT1 of the first lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a center thickness CT2 of the second lens on the optical axis satisfy: 1.0<(CT1+CT3+CT4) / CT2<1.6.

[0019] According to one embodiment of the present invention, the edge thickness ET1 of the first lens, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, and the edge thickness ET4 of the fourth lens satisfy: 1.2<(ET1+ET2) / (ET3+ET4)<1.9.

[0020] Another aspect of the present invention provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens having negative optical power, whose object-side surface is concave; a second lens having positive optical power, whose object-side surface is convex and whose image-side surface is convex; a third lens having negative optical power, whose image-side surface is concave; and a fourth lens having positive optical power, whose object-side surface is convex and whose image-side surface is concave.

[0021] Among them, each lens is independent of each other, and there is an air gap between each lens on the optical axis; the maximum field of view FOV of the optical imaging lens meets: 115° <FOV<130°。

[0022] Beneficial effects of the present invention:

[0023] The optical imaging lens provided by the present invention comprises a plurality of lenses, such as the first lens to the fourth lens. The optical imaging lens improves the FOV to a greater extent while maintaining the imaging quality, and maintains a small TTL, thus meeting the current mobile phone demand for wide-angle shooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 Schematic diagram of the structure of a lens assembly of an optical imaging lens embodiment 1 of the present invention;

[0026] Figure 2a to Figure 2d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens embodiment 1 of the present invention;

[0027] Figure 3 Schematic diagram of the lens group structure of Embodiment 2 of the optical imaging lens of the present invention;

[0028] Figures 4a to 4d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 2 of the optical imaging lens of the present invention;

[0029] Figure 5 Schematic diagram of the lens group structure of Embodiment 3 of the optical imaging lens of the present invention;

[0030] Figures 6a to 6d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 3 of the optical imaging lens of the present invention;

[0031] Figure 7 Schematic diagram of the lens group structure of Embodiment 4 of the optical imaging lens of the present invention;

[0032] Figures 8a to 8d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 4 of the optical imaging lens of the present invention;

[0033] Fig. 9 Schematic diagram of the lens group structure of Embodiment 5 of the optical imaging lens of the present invention;

[0034] Figures 10a to 10d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 5 of the optical imaging lens of the present invention;

[0035] Fig.11 Schematic diagram of the structure of a lens group of an optical imaging lens embodiment 6 of the present invention;

[0036] Figures 12a to 12d They are respectively the axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens embodiment 6 of the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present invention, the first lens discussed below may also be referred to as the second lens or the third lens.

[0039] It should also be understood that the terms "comprises", "including", "having", "includes" 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. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0040] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0041] In the description of the present invention, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0042] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal way unless explicitly defined in this article.

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The features, principles and other aspects of the present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0044] Exemplary Embodiments

[0045] The optical imaging lens of an exemplary embodiment of the present invention includes four lenses, which include: a first lens, a second lens, a third lens and a fourth lens in order from the object side to the image side along the optical axis, wherein each lens is independent of each other and has an air gap between each lens on the optical axis.

[0046] In this exemplary embodiment, the first lens has negative focal power, and its object side surface is concave; the second lens has positive focal power, and its object side surface is convex, and its image side surface is convex; the third lens has negative focal power, and its image side surface is concave; the fourth lens has positive focal power, and its object side surface is convex, and its image side surface is concave. The first lens with negative focal power and its object side surface is concave, and the second lens with positive focal power, its object side surface is convex, and its image side surface is convex, play the role of converging light. Together with the two lenses at the back, the focal length can be increased to the greatest extent while maintaining good convergence of light. At the same time, the third lens with negative focal power and its image side surface is concave, and the fourth lens with positive focal power, its object side surface is convex, and its image side surface is concave, can effectively reduce aberrations.

[0047] In this exemplary embodiment, the conditional formula satisfied by half of the diagonal length ImgH of the effective pixel region on the imaging surface and the maximum field of view angle FOV of the optical imaging lens is: 3.0 mm < ImgH × tan(1 / 2 × FOV) < 4.6 mm. By controlling 3.0 mm < ImgH * tan(1 / 2 * FOV) < 4.6 mm within an appropriate range, while maintaining the ultra-thin characteristic of the lens group, the lens has a wider imaging surface, which helps to broaden the usage range of the lens. More specifically, ImgH and FOV satisfy: 3.9 mm < ImgH × tan(1 / 2 × FOV) < 4.55 mm. For example, 3.95 mm ≤ ImgH × tan(1 / 2 × FOV) ≤ 4.50 mm.

[0048] In this exemplary embodiment, the conditional formula satisfied by the maximum field of view angle FOV of the optical imaging lens is: 115° < FOV < 130°. By adjusting FOV within an appropriate range, while increasing the image height of the system imaging, the aberration of the edge field of view can be avoided from being too large, which helps to better maintain the characteristics of a wide imaging range and high imaging quality of the system. At the same time, by increasing the full field of view angle of the imaging lens, more shooting space of objects can be obtained during long-distance shooting. More specifically, FOV satisfies: 116° < FOV < 125°. For example, 116.4° ≤ FOV ≤ 123.8°.

[0049] In this exemplary embodiment, the conditional formula satisfied by half of the diagonal length ImgH of the effective pixel region on the imaging surface is: 2.0 mm < ImgH < 3.0 mm. By restricting half of the diagonal length of the effective pixel region on the imaging surface, high pixels of the optical imaging system can be achieved, so that it can be better applied to more and more ultra-thin electronic products in the market. More specifically, ImgH satisfies: 2.3 mm < ImgH < 2.5 mm. For example, 2.40 mm ≤ ImgH ≤ 2.45 mm.

[0050] In this exemplary embodiment, the conditional formula satisfied by the effective focal length f1 of the first lens and the curvature radius R1 of the object side surface of the first lens is: 0.7 < f1 / R1 < 1.8. By reasonably controlling the effective focal length and the curvature radius of the image side surface of the first lens, the contributions of astigmatism and coma of the first lens are controlled within a reasonable range, and the astigmatism and coma generated by the latter two lenses can be effectively balanced, so that the lens group has better imaging quality. More specifically, f1 and R1 satisfy: 1.0 < f1 / R1 < 1.75. For example, 1.20 ≤ f1 / R1 ≤ 1.70.

[0051] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f3 of the third lens and the effective focal length f2 of the second lens is: -3.4 < f3 / f2 < -1.4. By reasonably adjusting the effective focal lengths of the second lens and the third lens, on the one hand, the optical power of the lens group can be more reasonably distributed, and it will not be overly concentrated on the second lens, which is beneficial to improving the imaging quality of the system and reducing the sensitivity of the system. On the other hand, the ultra-thin characteristic of the lens group can be maintained. More specifically, f3 and f2 satisfy: -3.3 < f3 / f2 < -1.5. For example, -3.27 ≤ f3 / f2 ≤ -1.55.

[0052] In this exemplary embodiment, the conditional expression satisfied by the curvature radius R3 of the object side of the second lens and the curvature radius R4 of the image side of the second lens is: 0.1 < (R3 + R4) / (R3 - R4) < 1.0. This helps to reduce the optical power value near the aperture of the second lens, and can effectively make it have a better converging effect on the marginal field light rays. This not only helps to improve the image quality of the system, but also greatly helps to improve the relative illumination of the system. At the same time, it can keep the second lens with good processing technology and improve the practicability of the lens group. More specifically, R3 and R4 satisfy: 0.2 < (R3 + R4) / (R3 - R4) < 0.9. For example, 0.22 ≤ (R3 + R4) / (R3 - R4) ≤ 0.87.

[0053] In this exemplary embodiment, the conditional expression satisfied by the curvature radius R8 of the image side of the fourth lens and the curvature radius R7 of the object side of the fourth lens is: 0.8 < R8 / R7 < 1.6. By reasonably controlling the curvature radius of the image side and the curvature radius of the object side of the fourth lens, the size of the system can be effectively reduced, the optical power of the system can be reasonably distributed, and it will not be overly concentrated on the fourth lens, and it is beneficial to the aberration correction of other lenses. More specifically, R8 and R7 satisfy: 0.9 < R8 / R7 < 1.5. For example, 0.94 ≤ R8 / R7 ≤ 1.45.

[0054] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens is: 1.5 < f / EPD < 2.5. By controlling the ratio of the effective focal length of the optical imaging lens to the entrance pupil diameter, the light passing amount of the lens can be effectively increased, and it has a high relative illumination, which can well improve the imaging quality of the lens in a darker environment. More specifically, f and EPD satisfy: 2.0 < f / EPD < 2.4. For example, 2.27 ≤ f / EPD ≤ 2.33.

[0055] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f of the optical imaging lens and the air gap T12 between the first lens and the second lens on the optical axis is: 1.5 < f / T12 < 2.5. By reasonably controlling the ratio of the effective focal length of the optical imaging lens to the air gap between the first lens and the second lens on the optical axis, the size of the lens group can be effectively reduced, and with the negative optical power of the first lens and the positive optical power of the second lens, the aberration of the marginal field of view can be effectively reduced while increasing the light transmission amount. More specifically, f and T12 satisfy: 1.7 < f / T12 < 2.4. For example, 1.79 ≤ f / T12 ≤ 2.38.

[0056] In this exemplary embodiment, the conditional expression satisfied by the effective semi-aperture DT11 on the object side of the first lens and the effective semi-aperture DT12 on the image side of the first lens is: 1.5 < DT11 / DT12 < 2.1. By restricting the ratio of the effective semi-aperture on the object side of the first lens to the effective semi-aperture on the image side of the first lens, the system can have a better imaging effect, effectively increase the light transmission amount of the lens group, improve the relative illumination of the system, especially the marginal field of view, so that the system still has good imaging quality in a relatively dark environment. More specifically, DT11 and DT12 satisfy: 1.6 < DT11 / DT12 < 2.0. For example, 1.63 ≤ DT11 / DT12 ≤ 1.95.

[0057] In this exemplary embodiment, the conditional expression satisfied by the effective semi-aperture DT42 on the image side of the fourth lens, the effective semi-aperture DT21 on the object side of the second lens, and the effective semi-aperture DT22 on the image side of the second lens is: 1.2 < DT42 / (DT21 + DT22) < 1.8. By restricting the ratio of the effective semi-aperture on the image side of the fourth lens to the sum of the effective semi-apertures on the object side of the second lens and the image side of the second lens, the light transmission amount of the lens group can be effectively increased, and the relative illumination of the system, especially the marginal field of view, can be improved, so that the system still has good imaging quality in a relatively dark environment. More specifically, DT42, DT21, and DT22 satisfy: 1.3 < DT42 / (DT21 + DT22) < 1.7. For example, 1.31 ≤ DT42 / (DT21 + DT22) ≤ 1.66.

[0058] In this exemplary embodiment, the conditional expression satisfied by the axial distance SL from the aperture stop to the imaging plane and the combined focal length f23 of the second and third lenses is: 1.5 < SL / f23 < 2.3. By controlling the ratio of the axial distance from the aperture stop to the imaging plane to the combined focal length of the second and third lenses, the imaging effect of the system can be improved, enabling the system to have a wider shooting angle, and thus enhancing the optical performance of the system. More specifically, SL and f23 satisfy: 1.7 < SL / f23 < 2.1. For example, 1.74 ≤ SL / f23 ≤ 2.02.

[0059] In this exemplary embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the center thickness CT2 of the second lens on the optical axis satisfy the condition: 1.0<(CT1+CT3+CT4) / CT2<1.6. By controlling the ratio of the sum of the center thicknesses of the first lens, the third lens, and the fourth lens to the center thickness of the second lens within a reasonable range, the thickness sensitivity of the lens can be reduced and the field curvature can be corrected. More specifically, CT1, CT3, CT4 and CT2 satisfy: 1.05<(CT1+CT3+CT4) / CT2<1.5, for example, 1.08≤(CT1+CT3+CT4) / CT2≤1.47.

[0060] In this exemplary embodiment, the edge thickness ET1 of the first lens, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, and the edge thickness ET4 of the fourth lens satisfy the conditional formula: 1.2<(ET1+ET2) / (ET3+ET4)<1.9. Reasonable allocation of the edge thicknesses of the first lens, the second lens, the third lens, and the fourth lens can improve the longitudinal spherical aberration of the system and the ghost image of the edge image plane, and at the same time, enhance the stability of the system structure. More specifically, ET1, ET2, ET3, and ET4 satisfy: 1.21<(ET1+ET2) / (ET3+ET4)<1.85, for example, 1.22≤(ET1+ET2) / (ET3+ET4)≤1.84.

[0061] In this exemplary embodiment, the optical imaging lens may further include a stop. The stop may be disposed at an appropriate position as required, for example, the stop may be disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0062] The optical imaging lens according to the above embodiment of the present invention may use multiple lenses, such as the above four lenses. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between lenses, the optical imaging lens has a larger imaging surface, a wide imaging range, and high imaging quality, and ensures the ultra-thinness of the mobile phone.

[0063] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the fourth lens is an aspherical mirror surface. The characteristics of an aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the first lens, the second lens, the third lens and the fourth lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the first lens, the second lens, the third lens and the fourth lens are all aspherical mirror surfaces.

[0064] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although four lenses are used as an example in the embodiments, the optical imaging lens is not limited to including four lenses, and the optical imaging lens may also include other numbers of lenses if necessary.

[0065] Specific embodiments of the optical imaging lens applicable to the above embodiments are further described below with reference to the accompanying drawings. Specific embodiment 1

[0067] Figure 1 Schematic diagram of the lens group structure of embodiment 1 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a filter E5 and an imaging surface S11.

[0068] The first lens E1 has negative power, its object side surface S1 is concave, and the image side surface S2 is concave. The second lens E2 has positive power, its object side surface S3 is convex, and the image side surface S4 is convex. The third lens E3 has negative power, its object side surface S5 is concave, and the image side surface S6 is concave. The fourth lens E4 has positive power, its object side surface S7 is convex, and the image side surface S8 is concave. The filter E5 has an object side surface S9 and an image side surface S10. The light from the object passes through each surface of surfaces S1 to S10 in sequence and is finally imaged on the imaging surface S11.

[0069] As shown in Table 1, it is a basic parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0070] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Abbe number Cone coefficient OBJ Spherical endless endless S1 Aspheric -2.4123 0.4752 -3.85 1.55 56.1 -1.0390 S2 Aspheric 17.5591 0.7970 0.0000 STO Spherical endless 0.0280 S3 Aspheric 1.8515 1.1601 1.35 1.55 56.1 4.9803 S4 Aspheric -0.9515 0.1047 -0.1685 S5 Aspheric -7.1742 0.3800 -2.08 1.68 19.2 0.0000 S6 Aspheric 1.7959 0.4641 0.0000 S7 Aspheric 0.9659 0.6039 4.79 1.54 55.7 -1.0143 S8 Aspheric 1.2078 0.5852 -2.0052 S9 Spherical endless 0.2100 1.52 64.2 S10 Spherical endless 0.1716 S11 Spherical endless

[0071] Table 1

[0072] As shown in Table 2, in Example 1, the total effective focal length of the optical imaging lens is f=1.77 mm, the distance TTL from the object-side surface S1 of the first lens E1 to the imaging surface S11 on the optical axis is 4.98 mm, half of the diagonal length of the effective pixel area on the imaging surface S11 is ImgH=2.40 mm, and the maximum field of view FOV of the optical imaging system is 120.2°.

[0073]

[0074] Table 2

[0075] The optical imaging lens in Example 1 satisfies:

[0076] ImgH×tan(1 / 2×FOV)=4.17mm, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface, and FOV is the maximum field of view of the optical imaging lens;

[0077] FOV = 120.2°, where FOV is the maximum field of view of the optical imaging lens;

[0078] ImgH = 2.40 mm, where ImgH is half the diagonal length of the effective pixel area on the imaging surface;

[0079] f1 / R1=1.60, where f1 is the effective focal length of the first lens, and R1 is the radius of curvature of the object side of the first lens;

[0080] f3 / f2=-1.55, where f3 is the effective focal length of the third lens and f2 is the effective focal length of the second lens;

[0081] (R3+R4) / (R3-R4)=0.32, where R3 is the radius of curvature of the object side of the second lens, and R4 is the radius of curvature of the image side of the second lens;

[0082] R8 / R7=1.25, where R8 is the radius of curvature of the image side surface of the fourth lens, and R7 is the radius of curvature of the object side surface of the fourth lens;

[0083] f / EPD=2.31, where f is the effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens;

[0084] f / T12=2.14, where f is the effective focal length of the optical imaging lens, and T12 is the air distance between the first lens and the second lens on the optical axis;

[0085] DT11 / DT12=1.71, where DT11 is the effective semi-aperture of the object side of the first lens, and DT12 is the effective semi-aperture of the image side of the first lens;

[0086] DT42 / (DT21+DT22)=1.52, where DT42 is the effective semi-aperture of the image side of the fourth lens, DT21 is the effective semi-aperture of the object side of the second lens, and DT22 is the effective semi-aperture of the image side of the second lens;

[0087] SL / f23=1.74, where SL is the axial distance from the aperture to the imaging surface, and f23 is the combined focal length of the second and third lenses;

[0088] (CT1+CT3+CT4) / CT2=1.26, where CT1 is the center thickness of the first lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, and CT2 is the center thickness of the second lens on the optical axis;

[0089] (ET1+ET2) / (ET3+ET4)=1.22, wherein ET1 is the edge thickness of the first lens, ET2 is the edge thickness of the second lens, ET3 is the edge thickness of the third lens, and ET4 is the edge thickness of the fourth lens.

[0090] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the fourth lens E4 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0091]

[0092] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1); k is the cone coefficient; Ai is the correction coefficient of the i-th order aspheric surface.

[0093] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the fourth lens E4 are aspherical surfaces. Table 3 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A5 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0094]

[0095]

[0096] Table 3

[0097] Figure 2a The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 2b The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 2c The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2d The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 2a to Figure 2d It can be seen from the figure that the optical imaging lens provided in Example 1 can achieve good imaging quality. Specific embodiment 2

[0099] Figure 3 Schematic diagram of the lens group structure of embodiment 2 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a filter E5 and an imaging surface S11.

[0100] The first lens E1 has negative power, its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has positive power, its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, its object side surface S7 is convex, and its image side surface S8 is concave. The filter E5 has an object side surface S9 and an image side surface S10. The light from the object passes through each surface of surfaces S1 to S10 in sequence and is finally imaged on the imaging surface S11.

[0101] As shown in Table 4, it is a basic parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0102]

[0103]

[0104] Table 4

[0105] As shown in Table 5, in Example 2, the total effective focal length of the optical imaging lens f=1.63 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S11 on the optical axis=5.01 mm, half of the diagonal length of the effective pixel area on the imaging surface S11 ImgH=2.45 mm, and the maximum field of view FOV of the optical imaging system=116.4°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0106]

[0107] Table 5

[0108] In Example 2, the object side surface and the image side surface of any one of the first lens E1 to the fourth lens E4 are aspherical surfaces. Table 6 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A5 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0109]

[0110]

[0111] Table 6

[0112] Figure 4a The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 4b The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 4c The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4d The magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 4a to 4d It can be seen from the figure that the optical imaging lens provided in Example 2 can achieve good imaging quality. Specific embodiment 3

[0114] Figure 5 Schematic diagram of the lens group structure of embodiment 3 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a filter E5 and an imaging surface S11.

[0115] The first lens E1 has negative power, its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has positive power, its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, its object side surface S7 is convex, and its image side surface S8 is concave. The filter E5 has an object side surface S9 and an image side surface S10. The light from the object passes through each surface of surfaces S1 to S10 in sequence and is finally imaged on the imaging surface S11.

[0116] As shown in Table 7, it is a basic parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0117] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Abbe number Cone coefficient OBJ Spherical endless endless S1 Aspheric -2.1547 0.3557 -3.26 1.55 56.1 -0.3557 S2 Aspheric 10.7476 0.6894 78.6305 STO Spherical endless 0.0279 S3 Aspheric 1.9433 0.9768 1.45 1.55 56.1 5.3341 S4 Aspheric -1.1009 0.0277 0.1869 S5 Aspheric 1.3618 0.2597 -4.75 1.68 19.2 0.0000 S6 Aspheric 0.8832 0.7394 -1.0000 S7 Aspheric 1.4271 0.4795 12.34 1.54 55.7 -0.8177 S8 Aspheric 1.6050 0.4250 -2.7062 S9 Spherical endless 0.2100 1.52 64.2 S10 Spherical endless 0.2071 S11 Spherical endless

[0118] Table 7

[0119] As shown in Table 8, in Example 3, the total effective focal length of the optical imaging lens f=1.68 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S11 on the optical axis=4.40 mm, half of the diagonal length of the effective pixel area on the imaging surface S11 ImgH=2.40 mm, and the maximum field of view FOV of the optical imaging system=123.8°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0120]

[0121] Table 8

[0122] In Example 3, the object side surface and the image side surface of any one of the first lens E1 to the fourth lens E4 are aspherical surfaces. Table 9 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A5 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0123]

[0124] Table 9

[0125] Figure 6a The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 6b The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6cThe distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 6d The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 6a to 6d It can be seen from the figure that the optical imaging lens provided in Example 3 can achieve good imaging quality. Specific embodiment 4

[0127] Figure 7 Schematic diagram of the lens group structure of embodiment 4 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a filter E5 and an imaging surface S11.

[0128] The first lens E1 has negative power, its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has positive power, its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, its object side surface S7 is convex, and its image side surface S8 is concave. The filter E5 has an object side surface S9 and an image side surface S10. The light from the object passes through each surface of surfaces S1 to S10 in sequence and is finally imaged on the imaging surface S11.

[0129] As shown in Table 10, it is a basic parameter table of the optical imaging lens of Example 4, wherein the units of the curvature radius, thickness, and focal length are all millimeters (mm).

[0130] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Abbe number Cone coefficient OBJ Spherical endless endless S1 Aspheric -2.0696 0.4560 -3.51 1.55 56.1 0.0000 S2 Aspheric 28.3272 0.8182 0.0000 STO Spherical endless 0.0280 S3 Aspheric 2.5000 0.9801 1.25 1.55 56.1 6.6982 S4 Aspheric -0.8070 0.0300 -0.3260 S5 Aspheric 1.5382 0.2300 -2.70 1.68 19.2 0.0000 S6 Aspheric 0.7848 0.8331 -0.9647 S7 Aspheric 1.9966 0.5000 25.68 1.54 55.7 -2.5081 S8 Aspheric 2.1301 0.4714 -1.0393 S9 Spherical endless 0.2100 1.52 64.2 S10 Spherical endless 0.1435 S11 Spherical endless

[0131] Table 10

[0132] As shown in Table 11, in Example 4, the total effective focal length of the optical imaging lens f=1.69 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S11 on the optical axis=4.70 mm, half of the diagonal length of the effective pixel area on the imaging surface S11 ImgH=2.45 mm, and the maximum field of view FOV of the optical imaging system=120.4°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0133]

[0134]

[0135] Table 11

[0136] In Example 4, the object side surface and the image side surface of any one of the first lens E1 to the fourth lens E4 are aspherical surfaces. Table 12 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0137]

[0138] Table 12

[0139] Figure 8a The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8b The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 8c The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 8d The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 8a to 8d It can be seen from the figure that the optical imaging lens provided in Example 4 can achieve good imaging quality. Specific embodiment 5

[0141] Fig. 9 Schematic diagram of the lens group structure of embodiment 5 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a filter E5 and an imaging surface S11.

[0142] The first lens E1 has negative power, its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has positive power, its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, its object side surface S7 is convex, and its image side surface S8 is concave. The filter E5 has an object side surface S9 and an image side surface S10. The light from the object passes through each surface of surfaces S1 to S10 in sequence and is finally imaged on the imaging surface S11.

[0143] As shown in Table 13, it is a basic parameter table of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0144] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Abbe number Cone coefficient OBJ Spherical endless endless S1 Aspheric -2.3341 0.3817 -3.70 1.55 56.1 0.2325 S2 Aspheric 15.7439 0.7496 90.0000 STO Spherical endless 0.0280 S3 Aspheric 1.8400 1.0423 1.50 1.55 56.1 5.5151 S4 Aspheric -1.1786 0.0280 0.0785 S5 Aspheric 1.4258 0.2600 -4.57 1.68 19.2 0.0000 S6 Aspheric 0.9044 0.8074 -1.0000 S7 Aspheric 1.6070 0.4800 70.09 1.54 55.7 -0.7796 S8 Aspheric 1.5034 0.4155 -3.1562 S9 Spherical endless 0.2100 1.52 64.2 S10 Spherical endless 0.1976 S11 Spherical endless

[0145] Table 13

[0146] As shown in Table 14, in Example 5, the total effective focal length of the optical imaging lens f=1.85 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S11 on the optical axis=4.60 mm, half of the diagonal length of the effective pixel area on the imaging surface S11 ImgH=2.40 mm, and the maximum field of view FOV of the optical imaging system=118.7°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0147]

[0148] Table 14

[0149] In Example 5, the object side surface and the image side surface of any one of the first lens E1 to the fourth lens E4 are aspherical surfaces. Table 15 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0150]

[0151] Table 15

[0152] Fig.10a The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig.10b The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.10c The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.10d The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 10a to 10d It can be seen from the figure that the optical imaging lens provided in Example 5 can achieve good imaging quality. Specific embodiment 6

[0154] Fig.11 Schematic diagram of the lens group structure of embodiment 6 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a filter E5 and an imaging surface S11.

[0155] The first lens E1 has negative power, its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has positive power, its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, its object side surface S7 is convex, and its image side surface S8 is concave. The filter E5 has an object side surface S9 and an image side surface S10. The light from the object passes through each surface of surfaces S1 to S10 in sequence and is finally imaged on the imaging surface S11.

[0156] As shown in Table 16, it is a basic parameter table of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0157] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Abbe number Cone coefficient OBJ Spherical endless endless S1 Aspheric -2.1259 0.4224 -3.11 1.55 56.1 -1.2076 S2 Aspheric 8.9703 0.8876 16.4147 STO Spherical endless 0.0297 S3 Aspheric 2.0444 1.0731 1.29 1.55 56.1 4.2098 S4 Aspheric -0.8783 0.0331 -0.1857 S5 Aspheric 42.4936 0.3800 -2.05 1.68 19.2 0.0000 S6 Aspheric 1.3401 0.4376 -0.7805 S7 Aspheric 0.9878 0.5422 4.15 1.54 55.7 -0.9384 S8 Aspheric 1.4321 0.6890 -2.7665 S9 Spherical endless 0.2100 1.52 64.2 S10 Spherical endless 0.2755 S11 Spherical endless

[0158] Table 16

[0159] As shown in Table 17, in Example 6, the total effective focal length of the optical imaging lens f=1.64 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S11 on the optical axis=4.98 mm, half of the diagonal length of the effective pixel area on the imaging surface S11 ImgH=2.40 mm, and the maximum field of view FOV of the optical imaging system=122.8°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0160]

[0161] Table 17

[0162] In Example 6, the object side surface and the image side surface of any one of the first lens E1 to the fourth lens E4 are aspherical surfaces. Table 18 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0163]

[0164]

[0165] Table 18

[0166] Fig.12a The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 12b The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.12c The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.12d The magnification chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 12a to 12d It can be seen from the figure that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0167] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, improvements, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: The optical imaging lens has four lenses with optical power, and the four lenses include, in order from the object side to the image side along the optical axis: The first lens has a negative optical power, and its object side surface is concave and its image side surface is concave; The second lens has positive refractive power, and its object-side surface is convex and its image-side surface is convex; The third lens has a negative optical power and its image side surface is concave; a fourth lens element having positive refractive power, whose object side surface is convex and image side surface is concave; Among them, half of the diagonal length of the effective pixel area on the imaging surface ImgH and the maximum field of view FOV of the optical imaging lens meet the following conditions: 3.95mm≤ImgH×tan(1 / 2×FOV)≤4.5mm; The effective focal length f1 of the first lens and the curvature radius R1 of the object side of the first lens satisfy: 1.2≤f1 / R1≤1.7; The effective focal length f of the optical imaging lens and the air interval T12 between the first lens and the second lens on the optical axis satisfy: 1.79≤f / T12≤2.

38.

2. The optical imaging lens according to claim 1, wherein: The maximum field of view FOV of the optical imaging lens satisfies: 116.4°≤FOV≤123.8°.

3. The optical imaging lens according to claim 1, wherein: Half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfies: 2.4mm≤ImgH≤2.45mm.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens and the effective focal length f2 of the second lens satisfy: -3.27≤f3 / f2≤-1.

55.

5. The optical imaging lens according to claim 1, wherein: A curvature radius R3 of the object side surface of the second lens and a curvature radius R4 of the image side surface of the second lens satisfy: 0.22≤(R3+R4) / (R3-R4)≤0.

87.

6. The optical imaging lens according to claim 1, wherein: A curvature radius R8 of the image side surface of the fourth lens and a curvature radius R7 of the object side surface of the fourth lens satisfy: 0.94≤R8 / R7≤1.

45.

7. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 2.27≤f / EPD≤2.

33.

8. The optical imaging lens according to claim 1, wherein: The effective half-aperture DT11 of the object side of the first lens and the effective half-aperture DT12 of the image side of the first lens satisfy the following: 1.63≤DT11 / DT12≤1.

95.

9. The optical imaging lens according to claim 1, wherein: The effective half-aperture DT42 of the image side surface of the fourth lens, the effective half-aperture DT21 of the object side surface of the second lens, and the effective half-aperture DT22 of the image side surface of the second lens satisfy: 1.31≤DT42 / (DT21+DT22)≤1.

66.

10. The optical imaging lens according to claim 1, wherein: The axial distance SL from the aperture to the imaging plane and the combined focal length f23 of the second and third lenses satisfy: 1.74≤SL / f23≤2.

02.

11. The optical imaging lens according to claim 1, wherein: A center thickness CT1 of the first lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a center thickness CT2 of the second lens on the optical axis satisfy: 1.08≤(CT1+CT3+CT4) / CT2≤1.

47.

12. The optical imaging lens according to claim 1, wherein: An edge thickness ET1 of the first lens, an edge thickness ET2 of the second lens, an edge thickness ET3 of the third lens, and an edge thickness ET4 of the fourth lens satisfy the following: 1.2<(ET1+ET2) / (ET3+ET4)≤1.84.

Images