Optical imaging lens and optical camera system

Abstract

The present invention relates to an optical imaging lens and an optical camera system, wherein the optical axis of the lens includes at least one aperture and, arranged in sequence from the object side to the image side, the following: a first lens having positive focal power, whose object-side surface is convex; a second lens having negative focal power, whose object-side surface is concave; and a third lens having a focal power, whose object-side surface is convex and whose image-side surface is concave; wherein the aperture value Fno of the optical imaging lens satisfies the following: Fno<1.8. An optical imaging lens employing such a structure facilitates the rational distribution of the focal power of the optical imaging lens, facilitates the balancing and correction of various aberrations to obtain high-quality images in macro applications, and can achieve large-aperture performance, that is, achieving both high-quality macro images and large-aperture imaging effects. The optical imaging lens and the optical camera system including the lens have extremely high imaging clarity and powerful camera performance, and have broad application prospects.

Description

Technical Field

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

[0002] In recent years, with the widespread adoption of smartphones and smart wearable devices, the application of optical imaging lenses and optical camera systems in macro conditions has become an emerging hotspot. Conventional optical imaging lenses struggle to simultaneously achieve high image quality and a large aperture in macro applications. Therefore, a miniaturized optical imaging lens that can achieve both high image quality and a large aperture in macro conditions is needed to meet market demand. Summary of the Invention

[0003] The present invention aims to provide an optical imaging lens and an optical camera system consisting of three lenses. The optical imaging lens and the optical camera system are miniaturized, can achieve high image quality and large aperture imaging effects at macro distances, and have extremely high imaging clarity.

[0004] One aspect of the present invention provides an optical imaging lens, comprising at least one aperture and a lens group on an optical axis, wherein the lens group comprises:

[0005] a first lens having positive optical power and a convex object-side surface;

[0006] a second lens having negative optical power and a concave object-side surface;

[0007] a third lens having optical power, the object-side surface of which is convex and the image-side surface of which is concave;

[0008] Wherein, the aperture value Fno of the optical imaging lens satisfies: Fno<1.8.

[0009] According to one embodiment of the present invention, the effective focal length f of the optical imaging lens and the average value Vd of the chromatic aberration coefficients of all lenses in the lens group satisfy: f / Vd<0.1 mm;

[0010] At least two lenses in the lens group are made of plastic.

[0011] According to one embodiment of the present invention, the effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens satisfy: 0.9<-f2 / f<1.6.

[0012] According to one embodiment of the present invention, the effective focal length f1 of the first lens and the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis satisfy: 0.3 <f1 / TTL≤0.5。

[0013] According to one embodiment of the present invention, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a curvature radius R5 of the object-side surface of the third lens, and a curvature radius R6 of the image-side surface of the third lens satisfy the following conditions: 0.2<(CT1+CT2+CT3) / (R6+R5)<0.9.

[0014] According to one embodiment of the present invention, the entrance pupil diameter EPD of the optical imaging lens and the effective radius DT21 of the object side of the second lens satisfy: 2.2 <EPD / DT21<2.8。

[0015] According to one embodiment of the present invention, the distance TD from the object side surface of the first lens to the image side surface of the third lens on the optical axis and the aperture value Fno of the optical imaging lens satisfy: TD / Fno<3.3 mm.

[0016] According to one embodiment of the present invention, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and half the diagonal length of the effective pixel area on the imaging plane ImgH satisfy the following: 2<(f1-f2) / ImgH<2.6.

[0017] According to one embodiment of the present invention, the curvature radius R3 of the object-side surface of the second lens and the effective focal length f of the optical imaging lens satisfy: 0.2<-R3 / f.

[0018] According to one embodiment of the present invention, the curvature radius R1 of the object-side surface of the first lens and the effective focal length f of the optical imaging lens satisfy: R1 / f<0.6.

[0019] Another aspect of the present invention provides an optical camera system, which includes the above-mentioned optical imaging lens.

[0020] Beneficial effects of the present invention:

[0021] The optical imaging lens provided by the present invention includes at least one aperture and a lens group on its optical axis. The lens group includes multiple lenses arranged sequentially from the object side to the image side, such as a first lens with positive focal power, whose object-side surface is convex; a second lens with negative focal power, whose object-side surface is concave; and a third lens with focal power, whose object-side surface is convex and whose image-side surface is concave. The aperture value Fno of the optical imaging lens satisfies the following conditions: Fno<1.8; and at least two lenses in the lens group are made of plastic. Meeting the aforementioned focal power, surface shape, and aperture value Fno conditions of the optical imaging lens facilitates the rational distribution of the focal power of the optical imaging lens, facilitates the balancing and correction of various aberrations of the optical imaging lens to obtain high-quality images in macro applications, and achieves the performance of the optical imaging lens at a large aperture, enabling the optical imaging lens to achieve high-quality and large-aperture imaging effects in macro applications. The optical imaging lens and an optical camera system including the optical imaging lens have extremely high imaging clarity and powerful camera performance, and have broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1a Schematic diagram of the structure of embodiment 1 of the optical imaging lens of the present invention;

[0024] Figure 1b to Figure 1d 2. Relative illumination curve, astigmatism curve and axial chromatic aberration curve of optical imaging lens embodiment 1 of the present invention, respectively;

[0025] Figure 2a Schematic diagram of the structure of embodiment 2 of the optical imaging lens of the present invention;

[0026] Figure 2b to Figure 2d 2 are the relative illumination curve, astigmatism curve, and axial chromatic aberration curve of Example 2 of the optical imaging lens of the present invention;

[0027] Figure 3a Schematic diagram of the structure of embodiment 3 of the optical imaging lens of the present invention;

[0028] Figures 3b to 3d 2. Relative illumination curve, astigmatism curve and axial chromatic aberration curve of optical imaging lens embodiment 3 of the present invention;

[0029] Figure 4a Schematic diagram of the structure of embodiment 4 of the optical imaging lens of the present invention;

[0030] Figures 4b to 4d 2. Relative illumination curve, astigmatism curve and axial chromatic aberration curve of optical imaging lens embodiment 4 of the present invention, respectively;

[0031] Figure 5a Schematic diagram of the structure of embodiment 5 of the optical imaging lens of the present invention;

[0032] Figures 5b to 5d 2. Relative illumination curve, astigmatism curve and axial chromatic aberration curve of optical imaging lens Example 5 of the present invention;

[0033] Figure 6a Schematic diagram of the structure of embodiment 6 of the optical imaging lens of the present invention;

[0034] Figures 6b to 6d 2. Relative illumination curve, astigmatism curve and axial chromatic aberration curve of optical imaging lens Example 6 of the present invention;

[0035] Figure 7a Schematic diagram of the structure of optical imaging lens embodiment 7 of the present invention;

[0036] Figures 7b to 7d 2. Relative illumination curve, astigmatism curve and axial chromatic aberration curve of optical imaging lens Example 7 of the present invention;

[0037] Figure 8a Schematic diagram of the structure of an optical imaging lens embodiment 8 of the present invention;

[0038] Figures 8b to 8d 2. Relative illumination curve, astigmatism curve and axial chromatic aberration curve of optical imaging lens Example 8 of the present invention;

[0039] Figure 9a Schematic diagram of the structure of optical imaging lens embodiment 9 of the present invention;

[0040] Figures 9b to 9d They are respectively the relative illumination curve, astigmatism curve and axial chromatic aberration curve of Example 9 of the optical imaging lens of the present invention. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 any creative efforts shall fall within the scope of protection of the present invention.

[0042] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of the present invention.

[0043] 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 preclude 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 list of 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.

[0044] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0045] In the present description, the paraxial region refers to the region near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0046] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal manner unless expressly defined as such herein.

[0047] 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 accompanying drawings and in combination with the embodiments.

[0048] Exemplary embodiments

[0049] The optical imaging lens according to an exemplary embodiment of the present invention includes an aperture and a lens group distributed on the optical axis. The lens group includes three lenses, and the order of the three lenses arranged along the optical axis from the object side to the image side is: the first lens, the second lens, and the third lens. Among them, each lens is independent of each other, and there is an air gap between each lens on the optical axis.

[0050] In this exemplary embodiment, the first lens has a positive optical power, and its object side is a convex surface; the second lens has a negative optical power, and its object side is a concave surface; the third lens has an optical power, and its object side is a convex surface and its image side is a concave surface. When the above optical power and surface shape conditions are met, it is beneficial to the reasonable distribution of the optical power of the optical imaging lens, and it is easy for the optical imaging lens to balance and correct various aberrations to obtain a high-image-quality picture under macro applications.

[0051] In this exemplary embodiment, the condition formula satisfied by the aperture value Fno of the optical imaging lens is: Fno < 1.8. The condition formula of the aperture value Fno of the optical imaging lens satisfying the above relationship can be beneficial to realizing the performance of the large aperture of the optical imaging lens. More specifically, the aperture value Fno of the optical imaging lens satisfies: 1.40 < Fno < 1.70. For example, 1.43 ≤ Fno ≤ 1.62.

[0052] In this exemplary embodiment, at least two lenses in the lens group are made of plastic. Through such a design, the cost can be effectively reduced and the yield rate can be improved.

[0053] In this exemplary embodiment, the condition formula satisfied by the effective focal length f of the optical imaging lens and the average value Vd of the dispersion coefficients of all lenses in the lens group is: f / Vd < 0.1 mm. Meeting the above requirements can effectively control the dispersion coefficients of all lenses, which is beneficial to balancing the lateral chromatic aberration of the system. More specifically, the effective focal length f of the optical imaging lens and the average value Vd of the dispersion coefficients of all lenses in the lens group satisfy: 0.06 mm < f / Vd < 0.09 mm. For example, 0.07 mm ≤ f / Vd ≤ 0.08 mm.

[0054] In this exemplary embodiment, the condition formula satisfied by the effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens is: 0.9 < -f2 / f < 1.6. Meeting the requirements of this condition formula limits the effective focal length of the second lens, which is beneficial to correcting the axial chromatic aberration of the system under macro applications and reducing the risk of purple fringing. More specifically, the effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens satisfy: 0.93 < -f2 / f < 1.2. For example, 0.95 ≤ -f2 / f ≤ 1.18.

[0055] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f1 of the first lens and the distance TTL from the object side of the first lens to the imaging surface on the optical axis is: 0.3 < f1 / TTL ≤ 0.5. Meeting the requirements of this conditional expression is beneficial to correcting the astigmatism of the microsystem under macro applications and controlling the system length to meet the miniaturization requirements. More specifically, the effective focal length f1 of the first lens and the distance TTL from the object side of the first lens to the imaging surface on the optical axis satisfy: 0.31 < f1 / TTL ≤ 0.5. For example, 0.33 ≤ f1 / TTL ≤ 0.50.

[0056] In this exemplary embodiment, the conditional expression satisfied by the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, the curvature radius R5 of the object side of the third lens, and the curvature radius R6 of the image side of the third lens is: 0.2 < (CT1 + CT2 + CT3) / (R6 + R5) < 0.9. Meeting the requirements of this conditional expression reasonably distributes the thicknesses of the three lenses and the curvature radii of the third lens, which is beneficial to correcting the lateral aberration of the optical imaging lens and also meets the processing and production requirements. More specifically, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, the curvature radius R5 of the object side of the third lens, and the curvature radius R6 of the image side of the third lens satisfy: 0.21 < (CT1 + CT2 + CT3) / (R6 + R5) < 0.88. For example, 0.22 ≤ (CT1 + CT2 + CT3) / (R6 + R5) ≤ 0.86.

[0057] In this exemplary embodiment, the conditional expression satisfied by the entrance pupil diameter EPD of the optical imaging lens and the effective radius DT21 of the object side of the second lens is: 2.2 < EPD / DT21 < 2.8. Meeting the requirements of this conditional expression reduces the influence of ghost images while restricting the size of the optical imaging lens. More specifically, the entrance pupil diameter EPD of the optical imaging lens and the effective radius DT21 of the object side of the second lens satisfy: 2.4 < EPD / DT21 < 2.7. For example, 2.47 ≤ EPD / DT21 ≤ 2.65.

[0058] In this exemplary embodiment, the conditional formula satisfied by the distance TD on the optical axis from the object side of the first lens to the image side of the third lens and the aperture value Fno of the optical imaging lens is: TD / Fno < 3.3 mm. Meeting the requirements of this conditional formula is beneficial to correcting the astigmatism of the system. More specifically, the distance TD on the optical axis from the object side of the first lens to the image side of the third lens and the aperture value Fno of the optical imaging lens satisfy: 1.40 mm < TD / Fno < 3.28 mm. For example, 1.44 mm ≤ TD / Fno ≤ 3.27 mm.

[0059] In this exemplary embodiment, the conditional formula satisfied by the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and half of the diagonal length ImgH of the effective pixel region on the imaging surface is: 2 < (f1 - f2) / ImgH < 2.6. Meeting the requirements of this conditional formula restricts the proportional relationship between the first lens and the second lens, which is beneficial to correcting the field curvature of the outer field under the macro application of the system. More specifically, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and half of the diagonal length ImgH of the effective pixel region on the imaging surface satisfy: 2.02 < (f1 - f2) / ImgH < 2.56. For example, 2.05 ≤ (f1 - f2) / ImgH ≤ 2.54.

[0060] In this exemplary embodiment, the conditional formula satisfied by the curvature radius R3 of the object side of the second lens and the effective focal length f of the optical imaging lens is: 0.2 < -R3 / f. Meeting the requirements of this conditional formula restricts the shape of the second lens, which is beneficial to balancing the monochromatic aberration of the system. More specifically, the curvature radius R3 of the object side of the second lens and the effective focal length f of the optical imaging lens satisfy: 0.27 < -R3 / f < 1.43. For example, 0.29 ≤ -R3 / f ≤ 1.41.

[0061] In this exemplary embodiment, the conditional formula satisfied by the curvature radius R1 of the object side of the first lens and the effective focal length f of the optical imaging lens is: R1 / f < 0.6. Meeting the requirements of this conditional formula restricts the shape of the first lens, which is beneficial to balancing the monochromatic aberration of the system. More specifically, the curvature radius R1 of the object side of the first lens and the effective focal length f of the optical imaging lens satisfy: 0.4 < R1 / f < 0.595. For example, 0.44 ≤ R1 / f ≤ 0.59.

[0062] In this exemplary embodiment, the aperture in the optical imaging lens can be positioned appropriately as needed. For example, the aperture can be positioned between the first and second lenses. Optionally, the optical imaging lens can further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0063] The optical imaging lens according to the above-described embodiment of the present invention can utilize multiple lenses, such as the three lenses described above. By rationally allocating the focal power, surface shape, center thickness of each lens, and the spacing between lenses on the optical axis, the optical imaging lens combines system miniaturization with high image quality and large aperture imaging at macro distances, resulting in extremely high image clarity and powerful imaging performance. This high-quality, large-aperture optical imaging lens has broad application prospects.

[0064] 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 surface of the first lens to the image side surface of the third 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 surface and the image side surface of each lens in the first lens, the second lens and the third lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each lens in the first lens, the second lens and the third lens are all aspherical mirror surfaces.

[0065] In another exemplary embodiment of the present invention, an optical camera system includes the optical imaging lens in the above embodiment to improve imaging performance.

[0066] However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens may be varied to achieve the various results and advantages described herein without departing from the technical solutions claimed herein. For example, while three lenses are described as an example in the embodiments, the optical imaging lens is not limited to including three lenses and may include other numbers of lenses if desired.

[0067] Specific embodiments of the optical imaging lens applicable to the above embodiments will be further described below with reference to the accompanying drawings. Specific embodiment 1

[0069] Figure 1aFIG4 is a schematic diagram of the structure of an optical imaging lens according to Example 1 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 element E1, an aperture stop STO, a second lens element E2, a third lens element E3, a filter E4, and an imaging surface S9. The dotted line in the figure represents the optical axis.

[0070] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The filter E4 has an object-side surface S7 and an image-side surface S8. Light from the object sequentially passes through surfaces S1 to S8 and is ultimately imaged on imaging surface S9. The effective focal length f1 of the first lens E1 is 2.72 mm, the effective focal length f2 of the second lens E2 is -3.45 mm, and the effective focal length f3 of the third lens E3 is 4.81 mm.

[0071] See Table 1, which shows the basic parameters of the optical imaging lens of Embodiment 1. The units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). OBJ stands for object:

[0072]

[0073]

[0074] Table 1

[0075] As shown in Table 2, in Specific Example 1, the effective focal length of the optical imaging lens is f = 3.34 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S9 is 5.99 mm, half the diagonal length of the effective pixel area on the imaging surface S9 is ImgH = 2.45 mm, and half the maximum field of view of the optical imaging lens, Semi-FOV, is 22.43°. The parameters of each relational expression are as described in the exemplary embodiments, and the specific values ​​of each relational expression are listed in Table 2 below:

[0076]

[0077] Table 2

[0078] The optical imaging lens in specific embodiment 1 meets the following requirements:

[0079] Fno=1.61, where Fno is the aperture value of the optical imaging lens;

[0080] f / Vd=0.08 mm, where f is the effective focal length of the optical imaging lens, and Vd is the average of the dispersion coefficients of all lenses in the lens group;

[0081] -f2 / f=1.03, where f is the effective focal length of the optical imaging lens and f2 is the effective focal length of the second lens;

[0082] f1 / TTL=0.45 mm, where f1 is the effective focal length of the first lens element, and TTL is the distance from the object-side surface of the first lens element to the imaging surface on the optical axis;

[0083] (CT1+CT2+CT3) / (R6+R5)=0.67, where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, 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;

[0084] EPD / DT21=2.47, where EPD is the entrance pupil diameter of the optical imaging lens and DT21 is the effective radius of the object side of the second lens element;

[0085] TD / Fno=1.44 mm, where TD is the distance from the object side of the first lens to the image side of the third lens on the optical axis, and Fno is the aperture value of the optical imaging lens;

[0086] (f1-f2) / ImgH=2.52, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and ImgH is the diagonal length of the effective pixel area on the imaging surface;

[0087] -R3 / f=0.36, where R3 is the radius of curvature of the object side of the second lens element, and f is the effective focal length of the optical imaging lens;

[0088] R1 / f=0.46, where R1 is the radius of curvature of the object side of the first lens element, and f is the effective focal length of the optical imaging lens element;

[0089] In this embodiment, the object-side surface and the image-side surface of any lens among the first lens E1 to the third lens E3 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but not limited to, the following formula (1)—aspherical surface formula:

[0090]

[0091] 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 conic coefficient; Ai is the correction coefficient of the i-th order aspheric surface.

[0092] In Example 1, the object-side surface and the image-side surface of any lens from the first lens E1 to the third lens E3 are aspherical surfaces. Table 3 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S6 that can be used in Example 1. 4 、A 6 、A 8 、A 10 、A 12 、A 14 and A 16 :

[0093] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.38E-02 5.46E-03 -6.42E-02 3.28E-02 6.14E-03 -3.89E-02 9.02E-03 S2 4.11E-02 -1.08E-01 1.66E-01 -3.33E-01 3.31E-01 -1.90E-01 4.88E-02 S3 -1.31E-01 1.41E+00 -5.32E+00 1.29E+01 -1.88E+01 1.48E+01 -4.87E+00 S4 -3.07E-01 2.37E+00 -8.37E+00 1.93E+01 -2.65E+01 1.99E+01 -6.22E+00 S5 1.53E-01 -1.98E-01 2.47E-01 -2.66E-01 1.80E-01 -6.18E-02 8.27E-03 S6 -8.82E-02 4.40E-03 1.97E-02 -1.04E-01 1.07E-01 -4.31E-02 5.85E-03

[0094] Table 3

[0095] Figure 1b The relative illumination curve of the optical imaging lens of Example 1 is shown, which shows the relationship between the image height and the relative illumination. Figure 1c The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 1d The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates that the light of different wavelengths deviates from the focal point after passing through the lens. Figure 1b to Figure 1d As shown, the optical imaging lens provided in Example 1 can achieve good imaging quality and extremely high imaging clarity. Specific embodiment 2

[0097] Figure 2a FIG4 is a schematic diagram of the structure of an optical imaging lens according to Example 2 of the present invention. The optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens element E1, an aperture stop STO, a second lens element E2, a third lens element E3, a filter E4, and an imaging surface S9. The dotted line in the figure represents the optical axis.

[0098] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The filter E4 has an object-side surface S7 and an image-side surface S8. Light from the object sequentially passes through each of surfaces S1 to S8 and is ultimately imaged on the imaging surface S9. The effective focal length f1 of the first lens E1 is 2.34 mm, the effective focal length f2 of the second lens E2 is -3.15 mm, and the effective focal length f3 of the third lens E3 is 6.67 mm.

[0099] See Table 4, which is a table of basic parameters of the optical imaging lens of Specific Example 2, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm):

[0100] Face number Surface type Radius of curvature Thickness / distance focal length Refractive index dispersion coefficient Cone coefficient OBJ spherical surface endless 9.0000 S1 Aspheric 1.6523 0.7319 2.34 1.54 56.1 -1.9772 S2 Aspheric -4.7619 0.1510 -39.5904 STO spherical surface endless 0.2898 S3 Aspheric -1.4050 0.6672 -3.15 1.66 20.4 -8.8842 S4 Aspheric -5.0831 0.3268 -45.3924 S5 Aspheric 0.9744 0.4177 6.67 1.54 56.1 -4.9295 S6 Aspheric 1.1287 2.9165 -0.4269 S7 spherical surface endless 0.2100 1.51 64.2 S8 spherical surface endless 0.2800 S9 spherical surface endless

[0101] Table 4

[0102] As shown in Table 5, in Specific Example 2, the effective focal length of the optical imaging lens is f = 3.29 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S9 is 5.99 mm, half the diagonal length of the effective pixel area on the imaging surface S9 is ImgH = 2.45 mm, and half the maximum field of view of the optical imaging lens, Semi-FOV, is 22.35°. The parameters of each relational expression are as described in the exemplary embodiments, and the specific values ​​of each relational expression are listed in Table 5 below:

[0103]

[0104]

[0105] Table 5

[0106] The optical imaging lens in specific embodiment 2 meets the following requirements:

[0107] Fno=1.55, where Fno is the aperture value of the optical imaging lens;

[0108] f / Vd=0.07 mm, where f is the effective focal length of the optical imaging lens, and Vd is the average of the dispersion coefficients of all lenses in the lens group;

[0109] -f2 / f=0.95, where f is the effective focal length of the optical imaging lens and f2 is the effective focal length of the second lens;

[0110] f1 / TTL=0.39 mm, where f1 is the effective focal length of the first lens element, and TTL is the distance from the object-side surface of the first lens element to the imaging surface on the optical axis;

[0111] (CT1+CT2+CT3) / (R6+R5)=0.86, where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, 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;

[0112] EPD / DT21=2.48, where EPD is the entrance pupil diameter of the optical imaging lens and DT21 is the effective radius of the object side of the second lens element;

[0113] TD / Fno=1.67 mm, where TD is the distance from the object side of the first lens to the image side of the third lens on the optical axis, and Fno is the aperture value of the optical imaging lens;

[0114] (f1-f2) / ImgH=2.24, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and ImgH is the diagonal length of the effective pixel area on the imaging surface;

[0115] -R3 / f=0.43, where R3 is the radius of curvature of the object side of the second lens element, and f is the effective focal length of the optical imaging lens;

[0116] R1 / f=0.50, where R1 is the radius of curvature of the object side of the first lens element, and f is the effective focal length of the optical imaging lens element;

[0117] In Example 2, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 6 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S6 that can be used in Example 2. 4 、A 6 、A 8 、A 10 、A 12 、A 14 and A 16 :

[0118] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.42E-02 5.34E-02 -2.72E-01 5.07E-01 -5.78E-01 3.33E-01 -8.26E-02 S2 -3.10E-02 4.58E-03 -3.38E-02 1.26E-02 -2.85E-02 2.25E-02 -5.91E-03 S3 -7.31E-02 7.50E-01 -2.57E+00 6.44E+00 -1.04E+01 9.30E+00 -3.46E+00 S4 -1.71E-01 1.31E+00 -4.04E+00 8.61E+00 -1.11E+01 7.93E+00 -2.36E+00 S5 2.16E-02 -1.51E-01 1.29E-01 -1.05E-01 7.15E-02 -2.48E-02 3.48E-03 S6 -3.74E-01 2.21E-01 -2.35E-01 1.58E-01 -6.25E-02 1.20E-02 -8.68E-04

[0119] Table 6

[0120] Figure 2b The relative illumination curve of the optical imaging lens of Example 2 is shown, which shows the relationship between the image height and the relative illumination. Figure 2c The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 2d The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates that the light of different wavelengths deviates from the focal point after passing through the lens. Figure 2b to Figure 2d As shown, the optical imaging lens provided in Example 2 can achieve good imaging quality and extremely high imaging clarity. Specific embodiment 3

[0122] Figure 3a FIG3 is a schematic diagram of the structure of Example 3 of the optical imaging lens according to the present invention. The optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens element E1, an aperture stop STO, a second lens element E2, a third lens element E3, a filter E4, and an imaging surface S9. The dotted line in the figure represents the optical axis.

[0123] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The filter E4 has an object-side surface S7 and an image-side surface S8. Light from the object sequentially passes through each of surfaces S1 to S8 and is ultimately imaged on the imaging surface S9. The effective focal length f1 of the first lens E1 is 2.71 mm, the effective focal length f2 of the second lens E2 is -3.18 mm, and the effective focal length f3 of the third lens E3 is 4.37 mm.

[0124] See Table 7, which is a table of basic parameters of the optical imaging lens of Specific Example 3, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm):

[0125] Face number Surface type Radius of curvature Thickness / distance focal length Refractive index dispersion coefficient Cone coefficient OBJ spherical surface endless 9.0000 S1 Aspheric 1.4664 0.7117 2.71 1.54 56.1 -1.0857 S2 Aspheric 151.3359 0.1532 -92.8755 STO spherical surface endless 0.3341 S3 Aspheric -1.2367 0.3967 -3.18 1.66 20.4 -7.2732 S4 Aspheric -3.3533 0.3941 -48.9557 S5 Aspheric 0.9226 0.4567 4.37 1.54 56.1 -3.7888 S6 Aspheric 1.2414 3.0385 -0.4844 S7 spherical surface endless 0.2100 1.51 64.2 S8 spherical surface endless 0.2400 S9 spherical surface endless

[0126] Table 7

[0127] As shown in Table 8, in Specific Example 3, the effective focal length of the optical imaging lens is f = 3.32 mm, the distance TTL along the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S9 is 5.94 mm, half the diagonal length of the effective pixel area on the imaging surface S9 is ImgH = 2.45 mm, and half the maximum field of view of the optical imaging lens, Semi-FOV, is 21.39°. The parameters of each relational expression are as described in the exemplary embodiments, and the specific values ​​of each relational expression are listed in Table 8 below:

[0128]

[0129] Table 8

[0130] The optical imaging lens in specific embodiment 3 meets the following requirements:

[0131] Fno=1.62, where Fno is the aperture value of the optical imaging lens;

[0132] f / Vd=0.08 mm, where f is the effective focal length of the optical imaging lens, and Vd is the average of the dispersion coefficients of all lenses in the lens group;

[0133] -f2 / f=0.96, where f is the effective focal length of the optical imaging lens and f2 is the effective focal length of the second lens;

[0134] f1 / TTL=0.46 mm, where f1 is the effective focal length of the first lens element, and TTL is the distance from the object-side surface of the first lens element to the imaging surface on the optical axis;

[0135] (CT1+CT2+CT3) / (R6+R5)=0.72, where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, 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;

[0136] EPD / DT21=2.58, where EPD is the entrance pupil diameter of the optical imaging lens and DT21 is the effective radius of the object side of the second lens element;

[0137] TD / Fno=1.51 mm, where TD is the distance from the object side of the first lens to the image side of the third lens on the optical axis, and Fno is the aperture value of the optical imaging lens;

[0138] (f1-f2) / ImgH=2.40, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and ImgH is the diagonal length of the effective pixel area on the imaging surface;

[0139] -R3 / f=0.37, where R3 is the radius of curvature of the object side of the second lens element, and f is the effective focal length of the optical imaging lens;

[0140] R1 / f=0.44, where R1 is the radius of curvature of the object side of the first lens element, and f is the effective focal length of the optical imaging lens element;

[0141] In Example 3, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 9 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S6 that can be used in Example 3. 4 、A 6 、A 8 、A 10 、A 12 、A 14 and A 16 :

[0142] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.74E-02 3.54E-02 -1.17E-01 1.90E-01 -2.30E-01 1.57E-01 -5.94E-02 S2 2.14E-02 1.28E-02 -2.63E-01 5.42E-01 -6.97E-01 4.30E-01 -9.89E-02 S3 -1.80E-01 1.46E+00 -5.34E+00 1.22E+01 -1.71E+01 1.36E+01 -4.68E+00 S4 -2.45E-01 1.75E+00 -6.03E+00 1.40E+01 -1.97E+01 1.51E+01 -4.83E+00 S5 1.73E-01 -2.13E-01 2.96E-01 -2.99E-01 1.72E-01 -4.98E-02 5.63E-03 S6 -9.93E-02 6.61E-03 1.32E-01 -2.36E-01 1.66E-01 -5.29E-02 6.32E-03

[0143] Table 9

[0144] Figure 3b The relative illumination curve of the optical imaging lens of Example 3 is shown, which shows the relationship between the image height and the relative illumination. Figure 3c The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 3d The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates that the light of different wavelengths deviates from the focal point after passing through the lens. Figures 3b to 3dAs shown, the optical imaging lens provided in Example 3 can achieve good imaging quality and extremely high imaging clarity. Specific embodiment 4

[0146] Figure 4a FIG4 is a schematic diagram of the structure of Example 4 of the optical imaging lens according to 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 element E1, an aperture stop STO, a second lens element E2, a third lens element E3, a filter E4, and an imaging surface S9. The dotted line in the figure represents the optical axis.

[0147] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The filter E4 has an object-side surface S7 and an image-side surface S8. Light from the object sequentially passes through surfaces S1 to S8 and is ultimately imaged on imaging surface S9. The effective focal length f1 of the first lens E1 is 2.39 mm, the effective focal length f2 of the second lens E2 is -3.17 mm, and the effective focal length f3 of the third lens E3 is 7.13 mm.

[0148] See Table 10, which is a table of basic parameters of the optical imaging lens of the fourth embodiment, wherein the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm):

[0149]

[0150]

[0151] Table 10

[0152] As shown in Table 11, in Specific Example 4, the effective focal length of the optical imaging lens is f = 3.13 mm, the distance TTL along the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S9 is 5.99 mm, half the diagonal length of the effective pixel area on the imaging surface S9 is ImgH = 2.45 mm, and half the maximum field of view of the optical imaging lens, Semi-FOV, is 22.92°. The parameters of each relational expression are as described in the exemplary embodiments, and the specific values ​​of each relational expression are listed in Table 8 below:

[0153]

[0154] Table 11

[0155] The optical imaging lens in specific embodiment 4 meets the following requirements:

[0156] Fno=1.53, where Fno is the aperture value of the optical imaging lens;

[0157] f / Vd=0.07 mm, where f is the effective focal length of the optical imaging lens, and Vd is the average of the dispersion coefficients of all lenses in the lens group;

[0158] -f2 / f=1.01, where f is the effective focal length of the optical imaging lens and f2 is the effective focal length of the second lens;

[0159] f1 / TTL=0.40 mm, where f1 is the effective focal length of the first lens element, and TTL is the distance from the object-side surface of the first lens element to the imaging surface on the optical axis;

[0160] (CT1+CT2+CT3) / (R6+R5)=0.67, where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, 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;

[0161] EPD / DT21=2.61, where EPD is the entrance pupil diameter of the optical imaging lens and DT21 is the effective radius of the object side of the second lens element;

[0162] TD / Fno=2.33 mm, where TD is the distance from the object side of the first lens to the image side of the third lens on the optical axis, and Fno is the aperture value of the optical imaging lens;

[0163] (f1-f2) / ImgH=2.27, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and ImgH is the diagonal length of the effective pixel area on the imaging surface;

[0164] -R3 / f=0.89, where R3 is the radius of curvature of the object side of the second lens element, and f is the effective focal length of the optical imaging lens;

[0165] R1 / f=0.49, where R1 is the radius of curvature of the object side of the first lens element, and f is the effective focal length of the optical imaging lens element;

[0166] In Example 4, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 12 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S6 that can be used in Example 4. 4 、A 6 、A 8 、A 10 、A 12 、A 14 and A 16 :

[0167] Face number A4 A6 A8 A10 A12 A14 A16 S1 -7.25E-04 -2.69E-02 9.78E-02 -1.99E-01 1.99E-01 -8.93E-02 4.92E-03 S2 1.24E-02 4.09E-03 -6.89E-02 1.38E-01 -1.39E-01 2.36E-02 1.65E-02 S3 -2.48E-02 2.75E-01 -1.57E+00 6.00E+00 -1.24E+01 1.29E+01 -5.28E+00 S4 -2.03E-01 3.93E-01 -7.08E-01 1.03E+00 -9.59E-01 4.67E-01 -7.78E-02 S5 -2.62E-01 3.19E-01 -6.74E-01 8.11E-01 -5.60E-01 1.85E-01 -2.29E-02 S6 1.20E-01 -2.71E-01 2.34E-01 -1.26E-01 4.05E-02 -7.07E-03 5.06E-04

[0168] Table 12

[0169] Figure 4b The relative illumination curve of the optical imaging lens of Example 4 is shown, which shows the relationship between the image height and the relative illumination. Figure 4c The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 4d The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates that the light of different wavelengths deviates from the focal point after passing through the lens. Figures 4b to 4d As shown, the optical imaging lens provided in Example 4 can achieve good imaging quality and extremely high imaging clarity. Specific embodiment 5

[0171] Figure 5a FIG4 is a schematic diagram of the structure of Example 5 of the optical imaging lens of the present invention. The optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens element E1, an aperture stop STO, a second lens element E2, a third lens element E3, a filter E4, and an imaging surface S9. The dotted line in the figure represents the optical axis.

[0172] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The filter E4 has an object-side surface S7 and an image-side surface S8. Light from the object sequentially passes through each of surfaces S1 to S8 and is ultimately imaged on the imaging surface S9. The effective focal length f1 of the first lens E1 is 1.95 mm, the effective focal length f2 of the second lens E2 is -3.53 mm, and the effective focal length f3 of the third lens E3 is -17.90 mm.

[0173] See Table 13, which is a table of basic parameters of the optical imaging lens of the fifth embodiment, wherein the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm):

[0174] Face number Surface type Radius of curvature Thickness / distance focal length Refractive index dispersion coefficient Cone coefficient OBJ spherical surface endless 9.0000 S1 Aspheric 1.7619 0.7692 1.95 1.54 56.1 -0.9899 S2 Aspheric -2.2742 0.1510 0.0682 STO spherical surface endless 0.2399 S3 Aspheric -1.6692 0.7549 -3.53 1.66 20.4 -7.5025 S4 Aspheric -6.8116 1.5725 -67.4997 S5 Aspheric 8.1782 1.1981 -17.90 1.54 56.1 12.4171 S6 Aspheric 4.2216 0.8179 1.5632 S7 spherical surface endless 0.2100 1.51 64.2 S8 spherical surface endless 0.2773 S9 spherical surface endless

[0175] Table 13

[0176] As shown in Table 14, in Specific Example 5, the effective focal length of the optical imaging lens is f = 2.98 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S9 is 5.99 mm, half the diagonal length of the effective pixel area on the imaging surface S9 is ImgH = 2.45 mm, and half the maximum field of view of the optical imaging lens, Semi-FOV, is 22.00°. The parameters of each relational expression are as described in the exemplary embodiments, and the specific values ​​of each relational expression are listed in Table 14 below:

[0177]

[0178] Table 14

[0179] The optical imaging lens in specific embodiment 5 meets the following requirements:

[0180] Fno=1.43, where Fno is the aperture value of the optical imaging lens;

[0181] f / Vd=0.07 mm, where f is the effective focal length of the optical imaging lens, and Vd is the average of the chromatic aberration coefficients of all lenses in the lens group;

[0182] -f2 / f=1.18, where f is the effective focal length of the optical imaging lens and f2 is the effective focal length of the second lens;

[0183] f1 / TTL=0.33 mm, where f1 is the effective focal length of the first lens element, and TTL is the distance from the object-side surface of the first lens element to the imaging surface on the optical axis;

[0184] (CT1+CT2+CT3) / (R6+R5)=0.22, where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, 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;

[0185] EPD / DT21=2.63, where EPD is the entrance pupil diameter of the optical imaging lens and DT21 is the effective radius of the object side of the second lens element;

[0186] TD / Fno=3.27 mm, where TD is the distance from the object side of the first lens to the image side of the third lens on the optical axis, and Fno is the aperture value of the optical imaging lens;

[0187] (f1-f2) / ImgH=2.24, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and ImgH is the diagonal length of the effective pixel area on the imaging surface;

[0188] -R3 / f=0.56, where R3 is the radius of curvature of the object side of the second lens element, and f is the effective focal length of the optical imaging lens;

[0189] R1 / f=0.59, where R1 is the radius of curvature of the object side of the first lens element, and f is the effective focal length of the optical imaging lens element;

[0190] In Example 5, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 15 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S6 that can be used in Example 5. 4 、A 6 、A 8 、A 10 、A 12 、A 14 and A 16 :

[0191] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.59E-02 2.33E-02 -1.89E-01 3.34E-01 -3.01E-01 1.19E-01 -1.37E-02 S2 8.43E-02 -1.54E-01 2.77E-01 -3.50E-01 2.87E-01 -1.58E-01 4.45E-02 S3 1.65E-01 -1.30E-01 4.66E-01 -5.06E-01 -1.14E+00 3.10E+00 -1.96E+00 S4 1.70E-01 3.50E-01 -8.76E-01 3.78E-01 2.10E+00 -3.25E+00 1.36E+00 S5 1.26E-02 -5.63E-02 6.19E-02 -3.45E-02 1.06E-02 -1.69E-03 1.08E-04 S6 1.35E-02 -4.95E-02 3.03E-02 -9.72E-03 1.61E-03 -1.11E-04 8.04E-07

[0192] Table 15

[0193] Figure 5b The relative illumination curve of the optical imaging lens of Example 5 is shown, which shows the relationship between the image height and the relative illumination. Figure 5c The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 5d The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates that the light of different wavelengths deviates from the focal point after passing through the lens. Figures 5b to 5d As shown, the optical imaging lens provided in Example 5 can achieve good imaging quality and extremely high imaging clarity. Specific embodiment 6

[0195] Figure 6a FIG4 is a schematic diagram of the structure of Example 6 of the optical imaging lens of the present invention. The optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens element E1, an aperture stop STO, a second lens element E2, a third lens element E3, a filter E4, and an imaging surface S9. The dotted line in the figure represents the optical axis.

[0196] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The filter E4 has an object-side surface S7 and an image-side surface S8. Light from the object sequentially passes through each of surfaces S1 to S8 and is ultimately imaged on the imaging surface S9. The effective focal length f1 of the first lens E1 is 2.44 mm, the effective focal length f2 of the second lens E2 is -3.25 mm, and the effective focal length f3 of the third lens E3 is 6.79 mm.

[0197] See Table 16, which is a table of basic parameters of the optical imaging lens of the sixth embodiment, wherein the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm):

[0198]

[0199]

[0200] Table 16

[0201] As shown in Table 17, in Specific Example 6, the effective focal length of the optical imaging lens is f = 3.18 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S9 is 5.99 mm, half the diagonal length of the effective pixel area on the imaging surface S9 is ImgH = 2.45 mm, and half the maximum field of view of the optical imaging lens, Semi-FOV, is 22.81°. The parameters of each relational expression are as described in the exemplary embodiments, and the specific values ​​of each relational expression are listed in Table 17 below:

[0202]

[0203] Table 17

[0204] The optical imaging lens in specific embodiment 6 meets the following requirements:

[0205] Fno=1.58, where Fno is the aperture value of the optical imaging lens;

[0206] f / Vd=0.07 mm, where f is the effective focal length of the optical imaging lens, and Vd is the average of the dispersion coefficients of all lenses in the lens group;

[0207] -f2 / f=1.02, where f is the effective focal length of the optical imaging lens and f2 is the effective focal length of the second lens;

[0208] f1 / TTL=0.41 mm, where f1 is the effective focal length of the first lens element, and TTL is the distance from the object-side surface of the first lens element to the imaging surface on the optical axis;

[0209] (CT1+CT2+CT3) / (R6+R5)=0.45, where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, 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;

[0210] EPD / DT21=2.57, where EPD is the entrance pupil diameter of the optical imaging lens and DT21 is the effective radius of the object side of the second lens element;

[0211] TD / Fno=2.26 mm, where TD is the distance from the object side of the first lens to the image side of the third lens on the optical axis, and Fno is the aperture value of the optical imaging lens;

[0212] (f1-f2) / ImgH=2.32, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and ImgH is the diagonal length of the effective pixel area on the imaging surface;

[0213] -R3 / f=1.41, where R3 is the radius of curvature of the object side of the second lens element, and f is the effective focal length of the optical imaging lens;

[0214] R1 / f=0.49, where R1 is the radius of curvature of the object side of the first lens element, and f is the effective focal length of the optical imaging lens element;

[0215] In Example 6, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 18 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S6 that can be used in Example 6. 4 、A 6 、A 8 、A 10 、A 12 、A 14 and A 16 :

[0216] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.10E-02 -2.92E-02 1.24E-01 -2.64E-01 2.83E-01 -1.46E-01 1.97E-02 S2 -8.52E-03 1.68E-02 -1.21E-01 2.61E-01 -3.02E-01 1.37E-01 -1.52E-02 S3 -1.71E-01 7.67E-01 -3.17E+00 9.64E+00 -1.75E+01 1.69E+01 -6.57E+00 S4 -1.28E-01 4.60E-01 -1.67E+00 4.16E+00 -5.78E+00 4.12E+00 -1.15E+00 S5 -1.45E-01 -8.63E-02 1.67E-01 -1.69E-01 6.79E-02 -9.51E-03 7.48E-05 S6 -5.76E-02 2.23E-02 -4.81E-02 4.10E-02 -1.86E-02 4.36E-03 -4.14E-04

[0217] Table 18

[0218] Figure 6b The relative illumination curve of the optical imaging lens of Example 6 is shown, which shows the relationship between the image height and the relative illumination. Figure 6cThe astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 6d The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates that the light of different wavelengths deviates from the focal point behind the lens. Figures 6b to 6d As shown, the optical imaging lens provided in Example 6 can achieve good imaging quality and extremely high imaging clarity. Specific embodiment 7

[0220] Figure 7a FIG4 is a schematic diagram of the structure of Example 7 of the optical imaging lens of the present invention. The optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens element E1, an aperture stop STO, a second lens element E2, a third lens element E3, a filter E4, and an imaging surface S9. The dotted line in the figure represents the optical axis.

[0221] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The filter E4 has an object-side surface S7 and an image-side surface S8. Light from the object sequentially passes through surfaces S1 to S8 and is ultimately imaged on imaging surface S9. The effective focal length f1 of the first lens E1 is 1.93 mm, the effective focal length f2 of the second lens E2 is -3.09 mm, and the effective focal length f3 of the third lens E3 is -39.32 mm.

[0222] See Table 19, which is a table of basic parameters of the optical imaging lens of the seventh embodiment, wherein the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm):

[0223] Face number Surface type Radius of curvature Thickness / distance focal length Refractive index dispersion coefficient Cone coefficient OBJ spherical surface endless 9.0000 S1 Aspheric 1.6022 0.8004 1.93 1.54 56.1 -1.4127 S2 Aspheric -2.5362 0.1510 -11.4559 STO spherical surface endless 0.2278 S3 Aspheric -1.8668 0.6284 -3.09 1.66 20.4 -3.7717 S4 Aspheric -22.8251 1.1773 99.9000 S5 Aspheric 3.8221 0.7242 -39.32 1.54 56.1 1.8154 S6 Aspheric 3.0273 1.4002 -3.1666 S7 spherical surface endless 0.2100 1.51 64.2 S8 spherical surface endless 0.2800 S9 spherical surface endless

[0224] Table 19

[0225] As shown in Table 20, in Specific Example 7, the effective focal length of the optical imaging lens is f = 3.02 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S9 is 5.60 mm, half the diagonal length of the effective pixel area on the imaging surface S9 is ImgH = 2.45 mm, and half the maximum field of view of the optical imaging lens, Semi-FOV, is 22.73°. The parameters of each relational expression are as described in the exemplary embodiments, and the specific values ​​of each relational expression are listed in Table 20 below:

[0226]

[0227]

[0228] Table 20

[0229] The optical imaging lens in specific embodiment 7 meets the following requirements:

[0230] Fno=1.43, where Fno is the aperture value of the optical imaging lens;

[0231] f / Vd=0.07 mm, where f is the effective focal length of the optical imaging lens, and Vd is the average of the dispersion coefficients of all lenses in the lens group;

[0232] -f2 / f=1.03, where f is the effective focal length of the optical imaging lens and f2 is the effective focal length of the second lens;

[0233] f1 / TTL=0.34 mm, where f1 is the effective focal length of the first lens element, and TTL is the distance from the object-side surface of the first lens element to the imaging surface on the optical axis;

[0234] (CT1+CT2+CT3) / (R6+R5)=0.31, where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, 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;

[0235] EPD / DT21=2.65, where EPD is the entrance pupil diameter of the optical imaging lens and DT21 is the effective radius of the object side of the second lens element;

[0236] TD / Fno=2.60 mm, where TD is the distance from the object side of the first lens to the image side of the third lens on the optical axis, and Fno is the aperture value of the optical imaging lens;

[0237] (f1-f2) / ImgH=2.05, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and ImgH is the diagonal length of the effective pixel area on the imaging surface;

[0238] -R3 / f=0.62, where R3 is the radius of curvature of the object side of the second lens element, and f is the effective focal length of the optical imaging lens;

[0239] R1 / f=0.53, where R1 is the radius of curvature of the object side of the first lens element, and f is the effective focal length of the optical imaging lens element;

[0240] In Example 7, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 21 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S6 that can be used in Example 7.4 、A 6 、A 8 、A 10 、A 12 、A 14 and A 16 :

[0241] Face number A4 A6 A8 A10 A12 A14 A16 S1 -4.00E-03 5.99E-02 -3.19E-01 6.30E-01 -6.78E-01 3.61E-01 -7.58E-02 S2 -3.70E-03 -1.33E-01 3.53E-01 -4.69E-01 2.76E-01 -4.31E-02 -1.12E-02 S3 2.51E-01 -2.72E-01 9.50E-01 -2.06E+00 1.03E+00 2.51E+00 -2.62E+00 S4 1.49E-01 8.55E-01 -3.59E+00 8.00E+00 -9.19E+00 5.26E+00 -1.22E+00 S5 -1.22E-01 1.37E-02 1.72E-02 -1.56E-02 6.16E-03 -1.07E-03 6.04E-05 S6 -7.90E-02 -3.76E-02 6.78E-02 -4.83E-02 1.82E-02 -3.52E-03 2.74E-04

[0242] Table 21

[0243] Figure 7b The relative illumination curve of the optical imaging lens of Example 7 is shown, which shows the relationship between image height and relative illumination. Figure 7c The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 7d The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates that the light of different wavelengths deviates from the focal point after passing through the lens. Figures 7b to 7d As shown, the optical imaging lens provided in Example 7 can achieve good imaging quality and extremely high imaging clarity. Specific embodiment 8

[0245] Figure 8a FIG4 is a schematic diagram of the structure of Example 8 of the optical imaging lens of the present invention. The optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens element E1, an aperture stop STO, a second lens element E2, a third lens element E3, a filter E4, and an imaging surface S9. The dotted line in the figure represents the optical axis.

[0246] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The filter E4 has an object-side surface S7 and an image-side surface S8. Light from the object sequentially passes through each of surfaces S1 to S8 and is ultimately imaged on the imaging surface S9. The effective focal length f1 of the first lens E1 is 2.62 mm, the effective focal length f2 of the second lens E2 is -3.39 mm, and the effective focal length f3 of the third lens E3 is 5.08 mm.

[0247] See Table 22, which is a table of basic parameters of the optical imaging lens of the eighth embodiment, wherein the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm):

[0248] Face number Surface type Radius of curvature Thickness / distance focal length Refractive index dispersion coefficient Cone coefficient OBJ spherical surface endless 9.0000 S1 Aspheric 1.5617 0.6760 2.62 1.54 56.1 -13.3222 S2 Aspheric -14.6396 0.1510 -0.0775 STO spherical surface endless 0.2928 S3 Aspheric -1.2166 0.4840 -3.39 1.66 20.4 -5.8013 S4 Aspheric -3.0636 0.2862 -34.5798 S5 Aspheric 0.9812 0.4530 5.08 1.54 56.1 -3.9100 S6 Aspheric 1.2704 3.1583 -2.6803 S7 spherical surface endless 0.2100 1.51 64.2 S8 spherical surface endless 0.2742 S9 spherical surface endless

[0249] Table 22

[0250] As shown in Table 23, in Specific Example 8, the effective focal length of the optical imaging lens is f = 3.33 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S9 is 5.99 mm, half the diagonal length of the effective pixel area on the imaging surface S9 is ImgH = 2.45 mm, and half the maximum field of view of the optical imaging lens, Semi-FOV, is 22.67°. The parameters of each relational expression are as described in the exemplary embodiments, and the specific values ​​of each relational expression are listed in Table 23 below:

[0251]

[0252] Table 23

[0253] The optical imaging lens in specific embodiment 8 meets the following requirements:

[0254] Fno=1.60, where Fno is the aperture value of the optical imaging lens;

[0255] f / Vd=0.08 mm, where f is the effective focal length of the optical imaging lens, and Vd is the average of the dispersion coefficients of all lenses in the lens group;

[0256] -f2 / f=1.02, where f is the effective focal length of the optical imaging lens and f2 is the effective focal length of the second lens;

[0257] f1 / TTL=0.44 mm, where f1 is the effective focal length of the first lens element, and TTL is the distance from the object-side surface of the first lens element to the imaging surface on the optical axis;

[0258] (CT1+CT2+CT3) / (R6+R5)=0.72, where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, 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;

[0259] EPD / DT21=2.49, where EPD is the entrance pupil diameter of the optical imaging lens and DT21 is the effective radius of the object side of the second lens element;

[0260] TD / Fno=1.46 mm, where TD is the distance from the object side surface of the first lens to the image side surface of the third lens on the optical axis, and Fno is the aperture value of the optical imaging lens;

[0261] (f1-f2) / ImgH=2.45, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and ImgH is the diagonal length of the effective pixel area on the imaging surface;

[0262] -R3 / f=0.37, where R3 is the radius of curvature of the object side of the second lens element, and f is the effective focal length of the optical imaging lens;

[0263] R1 / f=0.47, where R1 is the radius of curvature of the object side of the first lens element, and f is the effective focal length of the optical imaging lens element;

[0264] In Example 8, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 24 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S6 that can be used in Example 8. 4 、A 6 、A 8 、A 10 、A 12 、A 14 and A 16 :

[0265] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.95E-01 -7.58E-01 1.30E+00 -1.67E+00 1.34E+00 -6.21E-01 1.17E-01 S2 5.47E-02 -1.95E-01 5.06E-01 -9.89E-01 9.96E-01 -5.27E-01 1.17E-01 S3 1.79E-01 -9.20E-02 6.26E-02 -5.78E-03 -2.17E-01 4.54E-01 -2.63E-01 S4 -4.54E-02 9.34E-01 -3.24E+00 7.48E+00 -1.03E+01 7.76E+00 -2.43E+00 S5 1.29E-01 -2.33E-01 3.39E-01 -4.30E-01 3.32E-01 -1.28E-01 1.92E-02 S6 -3.77E-03 -5.83E-02 1.55E-01 -2.80E-01 2.42E-01 -9.63E-02 1.44E-02

[0266] Table 24

[0267] Figure 8b The relative illumination curve of the optical imaging lens of Example 8 is shown, which shows the relationship between the image height and the relative illumination. Figure 8c The astigmatism curve of the optical imaging lens of Example 8 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 8d The axial chromatic aberration curve of the optical imaging lens of Example 8 is shown, which indicates that the light of different wavelengths deviates from the focal point after passing through the lens. Figures 8b to 8d As shown, the optical imaging lens provided in Example 8 can achieve good imaging quality and extremely high imaging clarity. Specific embodiment 9

[0269] Figure 9a FIG4 is a schematic diagram of the structure of Example 9 of the optical imaging lens of the present invention. The optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens element E1, an aperture stop STO, a second lens element E2, a third lens element E3, a filter E4, and an imaging surface S9. The dotted line in the figure represents the optical axis.

[0270] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The filter E4 has an object-side surface S7 and an image-side surface S8. Light from the object sequentially passes through each of surfaces S1 to S8 and is ultimately imaged on the imaging surface S9. The effective focal length f1 of the first lens E1 is 3.02 mm, the effective focal length f2 of the second lens E2 is -3.20 mm, and the effective focal length f3 of the third lens E3 is 3.63 mm.

[0271] See Table 25, which is a table of basic parameters of the optical imaging lens of the ninth embodiment. The units of curvature radius, thickness / distance, and focal length are all in millimeters (mm):

[0272]

[0273]

[0274] Table 25

[0275] As shown in Table 26, in Specific Example 9, the effective focal length of the optical imaging lens is f = 3.33 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S9 is 5.99 mm, half the diagonal length of the effective pixel area on the imaging surface S9 is ImgH = 2.45 mm, and half the maximum field of view of the optical imaging lens, Semi-FOV, is 22.62°. The parameters of each relational expression are as described in the exemplary embodiments, and the specific values ​​of each relational expression are listed in Table 26 below:

[0276]

[0277] Table 26

[0278] The optical imaging lens in specific embodiment 9 meets the following requirements:

[0279] Fno=1.58, where Fno is the aperture value of the optical imaging lens;

[0280] f / Vd=0.08 mm, where f is the effective focal length of the optical imaging lens, and Vd is the average of the dispersion coefficients of all lenses in the lens group;

[0281] -f2 / f=0.96, where f is the effective focal length of the optical imaging lens and f2 is the effective focal length of the second lens;

[0282] f1 / TTL=0.50 mm, where f1 is the effective focal length of the first lens element, and TTL is the distance from the object-side surface of the first lens element to the imaging surface on the optical axis;

[0283] (CT1+CT2+CT3) / (R6+R5)=0.64, where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, 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;

[0284] EPD / DT21=2.49, where EPD is the entrance pupil diameter of the optical imaging lens and DT21 is the effective radius of the object side of the second lens element;

[0285] TD / Fno=1.45 mm, where TD is the distance from the object side of the first lens to the image side of the third lens on the optical axis, and Fno is the aperture value of the optical imaging lens;

[0286] (f1-f2) / ImgH=2.54, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and ImgH is the diagonal length of the effective pixel area on the imaging surface;

[0287] -R3 / f=0.29, where R3 is the radius of curvature of the object side of the second lens element, and f is the effective focal length of the optical imaging lens;

[0288] R1 / f=0.44, where R1 is the radius of curvature of the object side of the first lens element, and f is the effective focal length of the optical imaging lens element;

[0289] In Example 9, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 27 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S6 that can be used in Example 9. 4 、A 6 、A 8 、A 10 、A 12 、A 14 and A 16 :

[0290] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.76E-02 9.42E-02 -3.64E-01 7.94E-01 -1.01E+00 6.48E-01 -1.83E-01 S2 3.85E-02 -1.09E-01 2.28E-01 -1.90E-01 -2.90E-01 4.27E-01 -1.55E-01 S3 2.44E-01 -2.21E-01 5.60E-01 -1.48E+00 2.27E+00 -1.82E+00 6.07E-01 S4 3.97E-03 8.70E-01 -2.44E+00 4.13E+00 -4.06E+00 2.08E+00 -3.73E-01 S5 -5.00E-01 8.27E-01 -1.39E+00 1.50E+00 -1.00E+00 3.75E-01 -5.81E-02 S6 -1.45E-01 -8.53E-03 1.93E-01 -4.40E-01 4.19E-01 -1.90E-01 3.41E-02

[0291] Table 27

[0292] Figure 9b The relative illumination curve of the optical imaging lens of Example 9 is shown, which shows the relationship between the image height and the relative illumination. Figure 9cThe astigmatism curve of the optical imaging lens of Example 9 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 9d The axial chromatic aberration curve of the optical imaging lens of Example 9 is shown, which indicates that the light of different wavelengths deviates from the focal point after passing through the lens. Figures 9b to 9d As shown, the optical imaging lens provided in Example 9 can achieve good imaging quality and extremely high imaging clarity.

[0293] The present invention provides an optical imaging lens and an optical camera system, wherein the optical imaging lens includes at least one aperture and a lens group on its optical axis. The lens group includes multiple lenses arranged in sequence from the object side to the image side, such as a first lens with positive optical power, whose object side surface is convex; a second lens with negative optical power, whose object side surface is concave; and a third lens with optical power, whose object side surface is convex and whose image side surface is concave. The aperture value Fno of the optical imaging lens satisfies the following: Fno<1.8; and at least two lenses in the lens group are made of plastic. When the above-mentioned conditions of optical power, surface shape and aperture value Fno of the optical imaging lens are met, it is conducive to the reasonable distribution of the optical power of the optical imaging lens, and it is easy for the optical imaging lens to balance and correct various aberrations to obtain high-quality images in macro applications. It can also achieve the performance of the optical imaging lens with a large aperture, so that the optical imaging lens can achieve high-quality and large-aperture imaging effects in macro applications. The optical imaging lens and the optical camera system including the optical imaging lens have extremely high imaging clarity and powerful camera performance, and have broad application prospects.

[0294] 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An optical imaging lens, characterized in that: The optical imaging lens is composed of an aperture and a lens group arranged on the optical axis. The lens group has three lenses with optical power. The lens group includes the following lenses arranged in sequence from the object side to the image side: a first lens having positive optical power and a convex object-side surface; a second lens having negative optical power and a concave object-side surface; a third lens element having positive or negative optical power, with a convex object-side surface and a concave image-side surface; Wherein, the aperture value Fno of the optical imaging lens satisfies: 1.43≤Fno≤1.62; The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and half the diagonal length of the effective pixel area on the imaging surface ImgH satisfy the following: 2<(f1-f2) / ImgH≤2.54; The curvature radius R1 of the object side surface of the first lens and the effective focal length f of the optical imaging lens satisfy the following conditions: 0.44≤R1 / f≤0.53; The entrance pupil diameter EPD of the optical imaging lens and the effective radius DT21 of the object side surface of the second lens satisfy: 2.47≤EPD / DT21≤2.

65.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens and the average value Vd of the dispersion coefficients of all lenses in the lens group satisfy the following conditions: 0.07 mm ≤ f / Vd < 0.1 mm; At least two lenses in the lens group are made of plastic.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens satisfy: 0.9<-f2 / f≤1.

18.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the distance TTL from the object side of the first lens to the imaging surface on the optical axis satisfy: 0.3 <f1 / TTL≤0.5。 5. The optical imaging lens according to claim 1, wherein: The center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the curvature radius R5 of the object side surface of the third lens, and the curvature radius R6 of the image side surface of the third lens satisfy the following conditions: 0.2<(CT1+CT2+CT3) / (R6+R5)<0.

9.

6. The optical imaging lens according to claim 1, wherein: The distance TD from the object side surface of the first lens to the image side surface of the third lens on the optical axis and the aperture value Fno of the optical imaging lens satisfy the following conditions: 1.44 mm ≤ TD / Fno < 3.3 mm.

7. The optical imaging lens according to claim 1, wherein: The curvature radius R3 of the object side surface of the second lens and the effective focal length f of the optical imaging lens satisfy: 0.29≤-R3 / f≤1.

41.

8. An optical camera system, characterized in that: The optical camera system comprises the optical imaging lens according to any one of claims 1 to 7.

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