Camera lens

Abstract

The present application discloses a camera lens, which includes, in order from the object side to the image side along the optical axis: a first lens having negative optical power; a second lens having positive optical power, whose object-side surface is concave; a third lens having positive optical power; a fourth lens having negative optical power; and a fifth lens having positive optical power. The distance TTL from the object-side surface of the first lens to the imaging plane of the camera lens on the optical axis, the maximum half field of view (Semi-FOV) of the camera lens, and the F-number (Fno) of the camera lens can satisfy the following conditions: 4.5mm < TTL × Fno / tan (Semi-FOV) < 8.0mm; and the effective focal length f1 of the first lens and the effective focal length f3 of the third lens can satisfy the following conditions: -3.5 < f1 / f3 < -1.5.

Description

[0001] Divisional application statement

[0002] This application is a divisional application of the Chinese invention patent application with the invention name “Camera Lens” and application number 202110793604.6 filed on July 12, 2021. Technical Field

[0003] The present application relates to the field of optical elements, and in particular, to a camera lens. Background Art

[0004] With the rapid development of consumer electronics, the trend toward intelligent products is becoming increasingly pronounced. Intelligent electronic products often incorporate application functions such as scene capture and detection and recognition. As we all know, these functions are primarily achieved through the use of cameras installed in these products. Due to the inherent characteristics of intelligent electronic products, such as the need for miniaturization, the market has also placed stricter requirements on the cameras installed in these products to better meet their application needs. Summary of the Invention

[0005] The present application provides a camera lens. The camera lens includes, in order from the object side to the image side along the optical axis: a first lens with negative optical focal length; a second lens with positive optical focal length, whose object side surface is concave; a third lens with positive optical focal length; a fourth lens with negative optical focal length; and a fifth lens with positive optical focal length. The distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis, the maximum half field of view Semi-FOV of the camera lens, and the F number Fno of the camera lens can satisfy the following conditions: 4.5mm<TTL×Fno / tan(Semi-FOV)<8.0mm; and the effective focal length f1 of the first lens and the effective focal length f3 of the third lens can satisfy the following conditions: -3.5<f1 / f3<-1.5.

[0006] In one embodiment, at least one of the mirror surfaces from the object side surface of the first lens to the image side surface of the fifth lens is an aspherical mirror surface.

[0007] In one embodiment, the camera lens further includes an aperture located between the first lens and the second lens, and the spacing distance T1s from the image side surface of the first lens to the aperture on the optical axis, the spacing distance T12 from the image side surface of the first lens and the object side surface of the second lens on the optical axis, and the distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the maximum effective radius vertex of the object side surface of the second lens on the optical axis may satisfy: -2.0<(T12-T1s) / SAG21≤-1.5.

[0008] In one embodiment, the camera lens further includes an aperture, and the maximum effective radius DT11 of the object side of the first lens, the maximum effective radius DTs of the aperture, and the maximum effective radius DT52 of the image side of the fifth lens may satisfy: 0.9≤(DT11-DTs) / (DT52-DTs)≤1.2.

[0009] In one embodiment, the average value DT3 of the maximum effective radii of the object-side surface and the image-side surface of the third lens, the average value DT4 of the maximum effective radii of the object-side surface and the image-side surface of the fourth lens, and the maximum effective radius DT12 of the image-side surface of the first lens may satisfy: 0.9<(DT3+DT4) / (2×DT12)≤1.3.

[0010] In one embodiment, half the diagonal length ImgH of the effective pixel area on the imaging plane of the camera lens and the maximum effective radius DT11 of the object-side surface of the first lens may satisfy the following: 1.0≤ImgH / DT11<1.5.

[0011] In one embodiment, the total effective focal length f of the camera lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens may satisfy: 3.5<(f2+f3) / f<6.0.

[0012] In one embodiment, the total effective focal length f of the camera lens and the center thickness CT5 of the fifth lens on the optical axis may satisfy: 1.5≤f / CT5<3.0.

[0013] In one embodiment, the effective focal length f2 of the second lens and the curvature radius R3 of the object-side surface of the second lens may satisfy: -2.0<f2 / R3≤-0.9.

[0014] In one embodiment, 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 may satisfy: 2.0≤(|R3|−R4) / (|R3|+R4)<3.5.

[0015] In one embodiment, the effective focal length f1 of the first lens and the curvature radius R1 of the object-side surface of the first lens may satisfy: 1.5<f1 / R1<3.5.

[0016] In one embodiment, a curvature radius R5 of the object-side surface of the third lens and a center thickness CT3 of the third lens on the optical axis may satisfy: 2.0<R5 / CT3<5.0.

[0017] In one embodiment, the effective focal length f1 of the first lens, the effective focal length f3 of the third lens, and the center thickness CT3 of the third lens on the optical axis may satisfy: -5.0<(f1+f3) / CT3<-2.0.

[0018] In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis, half the diagonal length of the effective pixel area on the imaging surface of the camera lens ImgH, and the entrance pupil diameter EPD of the camera lens may satisfy the following: 1.4 mm ≤ TTL / (ImgH / EPD) < 2.0 mm.

[0019] In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis, the center thickness CT1 of the first lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis may satisfy: 3.0<TTL / (CT1+CT5)≤3.5.

[0020] In the exemplary embodiment of this application, by rationally allocating the optical power and surface characteristics of the first through fifth lenses, the camera lens is advantageously designed to have a wide field of view and a short overall length, while also facilitating comprehensive correction of various aberrations, resulting in superior imaging quality. Furthermore, by setting 4.5mm < TTL × Fno / tan (Semi-FOV) < 8.0mm, the camera lens is advantageously designed to have a wide field of view and a short overall length. By setting 3.5 < f1 / f3 < -1.5, the lens's coma aberration is effectively corrected, ensuring image clarity over a wide field of view. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0022] Figure 1 1 shows a schematic structural diagram of a camera lens according to Example 1 of the present application;

[0023] Figures 2A to 2C axial chromatic aberration curve, astigmatism curve, and distortion curve of the imaging lens of Example 1 are respectively shown;

[0024] Figure 3 Schematic diagram of the structure of a camera lens according to embodiment 2 of the present application is shown;

[0025] Figures 4A to 4C axial chromatic aberration curve, astigmatism curve, and distortion curve of the imaging lens of Example 2 are respectively shown;

[0026] Figure 5 1 shows a schematic structural diagram of a camera lens according to Example 3 of the present application;

[0027] Figures 6A to 6C axial chromatic aberration curve, astigmatism curve, and distortion curve of the imaging lens of Example 3 are shown respectively;

[0028] Figure 71 shows a schematic structural diagram of a camera lens according to Example 4 of the present application;

[0029] Figures 8A to 8C axial chromatic aberration curve, astigmatism curve, and distortion curve of the imaging lens of Example 4 are respectively shown;

[0030] Figure 9 A schematic structural diagram of a camera lens according to embodiment 5 of the present application is shown; and

[0031] Figures 10A to 10C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the imaging lens of Example 5 are respectively shown. DETAILED DESCRIPTION

[0032] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] 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 this application.

[0034] 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.

[0035] In this article, the paraxial region refers to the area 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.

[0036] 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.

[0037] 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 sense unless expressly defined as such herein.

[0038] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] The features, principles and other aspects of the present application are described in detail below.

[0040] The imaging lens according to an exemplary embodiment of the present application may include five lenses having optical power, namely a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. These five lenses are arranged in sequence along the optical axis from the object side to the image side. Any two adjacent lenses among the first through fifth lenses may be spaced apart by a distance.

[0041] In an exemplary embodiment, the first lens may have positive or negative optical power; the second lens may have positive or negative optical power, and its object-side surface may be concave; the third lens may have positive optical power; the fourth lens may have positive or negative optical power; and the fifth lens may have positive or negative optical power. By rationally allocating the optical power and surface characteristics of the first through fifth lenses, the camera lens can be designed to have a wide field of view, a short overall length, and other characteristics, while also facilitating comprehensive correction of various aberrations, resulting in superior imaging quality.

[0042] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following conditions: 4.5mm < TTL × Fno / tan(Semi-FOV) < 8.0mm, where TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging plane of the imaging lens, Semi-FOV is the maximum half-field-of-view angle of the imaging lens, and Fno is the F-number of the imaging lens. More specifically, TTL, Fno, and Semi-FOV may further satisfy the following conditions: 4.7mm < TTL × Fno / tan(Semi-FOV) < 7.3mm. Meeting the condition of 4.5mm < TTL × Fno / tan(Semi-FOV) < 8.0mm facilitates the imaging lens having characteristics such as a large field of view and a short overall length.

[0043] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following condition: 3.0 < TTL / (CT1 + CT5) ≤ 3.5, where TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging plane of the imaging lens, CT1 is the center thickness of the first lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis. Satisfying 3.0 < TTL / (CT1 + CT5) ≤ 3.5 facilitates miniaturization.

[0044] In an exemplary embodiment, the camera lens according to the present application further includes an aperture stop disposed between the first lens and the second lens. The camera lens according to the present application may satisfy: -2.0<(T12-T1s) / SAG21≤-1.5, wherein T1s is the distance between the image side surface of the first lens and the aperture stop on the optical axis, T12 is the distance between the image side surface of the first lens and the object side surface of the second lens on the optical axis, and SAG21 is the distance from the intersection of the object side surface of the second lens and the optical axis to the vertex of the maximum effective radius of the object side surface of the second lens on the optical axis. More specifically, T12, T1s, and SAG21 may further satisfy: -1.9<(T12-T1s) / SAG21≤-1.5. Satisfying -2.0<(T12-T1s) / SAG21≤-1.5 can better correct the spherical aberration of the lens.

[0045] In an exemplary embodiment, the camera lens according to the present application can satisfy the following: 0.9 ≤ (DT11 - DTs) / (DT52 - DTs) ≤ 1.2, where DT11 is the maximum effective radius of the object side of the first lens element, DTs is the maximum effective radius of the aperture, and DT52 is the maximum effective radius of the image side of the fifth lens element. This 0.9 ≤ (DT11 - DTs) / (DT52 - DTs) ≤ 1.2 allows for a reasonable allocation of the optical power of each lens element, comprehensively corrects coma aberration within the lens, and ensures image clarity in the peripheral field of view.

[0046] In an exemplary embodiment, the camera lens according to the present application may satisfy the following condition: 0.9 < (DT3 + DT4) / (2 × DT12) ≤ 1.3, where DT3 is the average of the maximum effective radii of the object-side and image-side surfaces of the third lens element, DT4 is the average of the maximum effective radii of the object-side and image-side surfaces of the fourth lens element, and DT12 is the maximum effective radius of the image-side surface of the first lens element. Satisfying 0.9 < (DT3 + DT4) / (2 × DT12) ≤ 1.3 allows for optimal matching of the third and fourth lens elements to correct vertical chromatic aberration and improve image quality.

[0047] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following condition: 1.0 ≤ ImgH / DT11 < 1.5, where ImgH is half the diagonal length of the effective pixel area on the imaging plane of the imaging lens, and DT11 is the maximum effective radius of the object-side surface of the first lens. This condition ensures a reasonable overall lens layout and good manufacturability.

[0048] In an exemplary embodiment, the camera lens according to the present application may satisfy the following relationship: -3.5 < f1 / f3 < -1.5, where f1 is the effective focal length of the first lens element and f3 is the effective focal length of the third lens element. More specifically, f1 and f3 may further satisfy the following relationship: -3.2 < f1 / f3 < -1.5. This relationship, which satisfies the above conditions, effectively corrects coma aberration in the lens, ensuring image clarity over a wide field of view.

[0049] In an exemplary embodiment, the camera lens according to the present application may satisfy the following relationship: 3.5 < (f2 + f3) / f < 6.0, where f is the total effective focal length of the camera lens, f2 is the effective focal length of the second lens element, and f3 is the effective focal length of the third lens element. More specifically, f2, f3, and f may further satisfy the following relationship: 3.7 < (f2 + f3) / f < 5.8. This 3.5 < (f2 + f3) / f < 6.0 helps correct the field curvature of the lens, ensuring clear imaging quality in both the center and the edges of the image.

[0050] In an exemplary embodiment, the camera lens according to the present application may satisfy the following condition: 1.5 ≤ f / CT5 < 3.0, where f is the total effective focal length of the camera lens and CT5 is the center thickness of the fifth lens element along the optical axis. More specifically, f and CT5 may further satisfy the following condition: 1.5 ≤ f / CT5 < 2.7. This condition, 1.5 ≤ f / CT5 < 3.0, facilitates correcting optical distortion in the lens, ensuring that captured images are free of noticeable distortion.

[0051] In an exemplary embodiment, the camera lens according to the present application may satisfy the following: -2.0 < f2 / R3 ≤ -0.9, where f2 is the effective focal length of the second lens element and R3 is the radius of curvature of the object-side surface of the second lens element. More specifically, f2 and R3 may further satisfy the following: -1.6 < f2 / R3 ≤ -0.9. This condition of -2.0 < f2 / R3 ≤ -0.9 effectively corrects spherical aberration, reduces the tolerance sensitivity of the second lens element, and improves its manufacturability.

[0052] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following conditions: 2.0 ≤ (|R3| - R4) / (|R3| + R4) < 3.5, where R3 is the radius of curvature of the object-side surface of the second lens element, and R4 is the radius of curvature of the image-side surface of the second lens element. More specifically, R3 and R4 may further satisfy the following conditions: 2.0 ≤ (|R3| - R4) / (|R3| + R4) < 3.2. Satisfying 2.0 ≤ (|R3| - R4) / (|R3| + R4) < 3.5 effectively corrects off-axis field curvature and astigmatism.

[0053] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following conditions: 1.5 < f1 / R1 < 3.5, where f1 is the effective focal length of the first lens element and R1 is the radius of curvature of the object-side surface of the first lens element. More specifically, f1 and R1 may further satisfy the following conditions: 1.5 < f1 / R1 < 3.2. This condition of 1.5 < f1 / R1 < 3.5 comprehensively corrects spherical aberration in the central field of view and coma in the peripheral fields of view, facilitating the imaging lens's ability to achieve both a wide aperture and sharp imaging quality.

[0054] In an exemplary embodiment, the camera lens according to the present application may satisfy the following relationship: 2.0 < R5 / CT3 < 5.0, where R5 is the radius of curvature of the object-side surface of the third lens element, and CT3 is the center thickness of the third lens element along the optical axis. More specifically, R5 and CT3 may further satisfy the following relationship: 2.0 < R5 / CT3 < 4.8. This relationship helps correct axial chromatic aberration in the lens.

[0055] In an exemplary embodiment, the camera lens according to the present application may satisfy the following relationship: -5.0 < (f1 + f3) / CT3 < -2.0, where f1 is the effective focal length of the first lens element, f3 is the effective focal length of the third lens element, and CT3 is the center thickness of the third lens element along the optical axis. More specifically, f1, f3, and CT3 may further satisfy the following relationship: -4.4 < (f1 + f3) / CT3 < -2.2. This relationship, -5.0 < (f1 + f3) / CT3 < -2.0, helps correct spherical aberration in the camera lens and improves overall image quality.

[0056] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following conditions: 1.4mm ≤ TTL / (ImgH / EPD) < 2.0mm, where TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging plane of the imaging lens, ImgH is half the diagonal length of the effective pixel area on the imaging plane of the imaging lens, and EPD is the entrance pupil diameter of the imaging lens. More specifically, TTL, ImgH, and EPD may further satisfy the following conditions: 1.4mm ≤ TTL / (ImgH / EPD) < 1.8mm. Meeting the condition of 1.4mm ≤ TTL / (ImgH / EPD) < 2.0mm facilitates the imaging lens to simultaneously possess characteristics such as a short length, a large image plane, and a large aperture.

[0057] In an exemplary embodiment, the optical imaging lens according to the present application further includes an aperture disposed between the first lens and the second lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0058] The camera lens according to the above-described embodiment of the present application can utilize multiple lenses, such as the five lenses described above. By rationally allocating the optical power, surface shape, center thickness of each lens, and the on-axis spacing between lenses, the size of the camera lens can be effectively reduced and its manufacturability improved, making it more convenient for production and processing and suitable for use in portable electronic products. The camera lens configured as described above has the characteristics of wide angle, small size, and good image quality, and can well meet the usage requirements of various portable electronic products in camera scenarios.

[0059] In an embodiment of the present application, 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 fifth lens is an aspherical mirror surface. The characteristic of an aspherical lens is that 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, the third lens, the fourth lens and the fifth 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, the third lens, the fourth lens and the fifth lens are all aspherical mirror surfaces.

[0060] However, those skilled in the art will appreciate that the number of lenses comprising the imaging lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe five lenses as an example, the imaging lens is not limited to including five lenses. If desired, the imaging lens may also include other numbers of lenses.

[0061] Specific embodiments of the imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0062] Example 1

[0063] The following reference Figures 1 to 2C The imaging lens according to the first embodiment of the present application will be described. Figure 1 A schematic structural diagram of a camera lens according to embodiment 1 of the present application is shown.

[0064] like Figure 1 As shown, the camera lens includes, from the object side to the image side, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0065] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes through each surface S1 to S12 in sequence and is ultimately imaged on the imaging surface S13.

[0066] Table 1 shows basic parameters of the camera lens of Example 1, wherein the units of curvature radius, thickness / distance and focal length are all millimeters (mm).

[0067]

[0068] Table 1

[0069] In this example, the total effective focal length f of the camera lens is 1.23 mm, and the maximum field of view FOV of the camera lens is 123.1°.

[0070] In Example 1, the object-side surface and the image-side surface of any lens among the first lens E1 to the fifth lens E5 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0071]

[0072] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface 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 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below lists 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, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75, A80, A81, A9, A10, A11, A12, A13, A14, A15 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0073] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.0936E+00 -8.9743E-02 4.0139E-02 -8.0981E-03 3.5722E-03 -1.2495E-03 3.2514E-04 -2.0911E-04 0.0000E+00 S2 2.0255E-01 9.6178E-03 6.3217E-03 5.8962E-04 -1.8321E-04 -2.8920E-04 -2.7586E-04 -1.0628E-04 -7.8851E-05 S3 -1.6497E-02 -9.9391E-04 -1.3576E-04 -2.8654E-05 -8.1299E-06 -1.8499E-06 -9.7852E-06 0.0000E+00 0.0000E+00 S4 -8.5991E-02 2.2114E-03 -2.7213E-03 -5.8865E-05 -2.3057E-04 7.9174E-06 5.3737E-06 0.0000E+00 0.0000E+00 S5 -7.6377E-02 3.2993E-02 -6.2218E-03 2.1839E-03 -7.6288E-04 4.3665E-04 -1.4495E-04 3.4691E-05 -4.3195E-05 S6 1.0542E-01 5.5978E-02 1.4719E-02 2.9555E-03 1.0241E-03 1.2741E-03 2.3525E-04 7.1892E-04 2.5844E-04 S7 1.1979E+00 -2.1946E-01 4.7143E-02 -1.8273E-02 5.8627E-03 -2.5071E-03 9.6493E-04 1.7506E-04 2.5651E-04 S8 1.0623E+00 -1.6060E-01 2.3952E-02 -8.5505E-03 5.5336E-03 -3.5860E-03 1.4649E-03 -2.6208E-04 0.0000E+00 S9 -7.4868E-01 8.1502E-02 -5.7542E-03 1.5877E-02 -3.3726E-03 -2.5776E-04 -1.8468E-03 8.3479E-04 0.0000E+00 S10 -1.0348E-02 -2.6216E-01 6.4194E-02 -2.4156E-02 1.7988E-02 -3.2404E-03 1.6675E-03 2.5370E-04 0.0000E+00

[0074] Table 2

[0075] Figure 2A The axial chromatic aberration curve of the imaging lens of Example 1 is shown, which indicates the deviation of the convergence point of light of different wavelengths passing through the lens. Figure 2B The astigmatism curve of the imaging lens of Example 1 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 2C The distortion curve of the camera lens of Example 1 is shown, which represents the distortion value corresponding to different field angles. Figures 2A to 2C It can be seen that the camera lens provided in Example 1 can achieve good imaging quality.

[0076] Example 2

[0077] The following reference Figures 3 to 4C The camera lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 3 A schematic structural diagram of a camera lens according to embodiment 2 of the present application is shown.

[0078] like Figure 3 As shown, the camera lens includes, from the object side to the image side, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0079] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes through each surface S1 to S12 in sequence and is ultimately imaged on the imaging surface S13.

[0080] In this example, the total effective focal length f of the camera lens is 1.78 mm, and the maximum field of view FOV of the camera lens is 120.0°.

[0081] Table 3 shows the basic parameters of the camera lens of Example 2, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Table 4 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 2, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0082]

[0083] Table 3

[0084] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.5080E-01 -6.8482E-02 1.2895E-02 1.3270E-02 -1.2784E-02 5.3213E-03 -1.2117E-03 1.4524E-04 -7.1031E-06 S2 1.4354E-01 2.2948E+00 -1.6635E+01 6.5121E+01 -1.5622E+02 2.3439E+02 -2.1346E+02 1.0751E+02 -2.2907E+01 S3 -2.2431E-01 -1.4501E+00 5.8669E+00 3.8776E+01 -5.4228E+02 1.3641E+03 4.9161E+01 0.0000E+00 0.0000E+00 S4 -8.5186E-01 3.1835E+00 -2.4342E+00 -5.6786E+01 2.6807E+02 -4.9927E+02 3.3963E+02 0.0000E+00 0.0000E+00 S5 -2.4014E-01 1.8232E+00 -5.6075E+00 8.4406E+00 -2.8042E+00 -1.0706E+01 1.7451E+01 -1.0854E+01 2.5103E+00 S6 -6.1497E-02 -9.7778E-01 6.0252E+00 -1.7766E+01 3.1271E+01 -3.4430E+01 2.3275E+01 -8.8248E+00 1.4340E+00 S7 4.1394E-01 -2.5276E+00 9.0505E+00 -2.0114E+01 2.8310E+01 -2.5443E+01 1.4194E+01 -4.4803E+00 6.1097E-01 S8 -2.5205E-01 9.5943E-01 -1.6054E+00 1.2962E+00 -1.4443E-01 -5.4874E-01 4.1401E-01 -1.2138E-01 1.2981E-02 S9 3.9912E-02 1.0674E-01 -4.5417E-01 5.7447E-01 -3.9626E-01 1.6805E-01 -4.3960E-02 6.5297E-03 -4.2247E-04 S10 1.3088E-01 -2.2778E-01 2.0415E-01 -1.3740E-01 6.7673E-02 -2.3105E-02 5.0565E-03 -6.2590E-04 3.2845E-05

[0085] Table 4

[0086] Figure 4A The axial chromatic aberration curve of the imaging lens of Example 2 is shown, which indicates the deviation of the convergence point of light of different wavelengths passing through the back of the lens. Figure 4B The astigmatism curve of the imaging lens of Example 2 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 4C The distortion curve of the camera lens of Example 2 is shown, which represents the distortion value corresponding to different field angles. Figures 4A to 4C It can be seen that the camera lens provided in Example 2 can achieve good imaging quality.

[0087] Example 3

[0088] The following reference Figures 5 to 6C The imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of a camera lens according to embodiment 3 of the present application is shown.

[0089] like Figure 5As shown, the camera lens includes, from the object side to the image side, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0090] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes through each surface S1 to S12 in sequence and is ultimately imaged on the imaging surface S13.

[0091] In this example, the total effective focal length f of the camera lens is 1.56 mm, and the maximum field of view FOV of the camera lens is 120.0°.

[0092] Table 5 shows the basic parameters of the camera lens of Example 3, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Table 6 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 3, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0093]

[0094] Table 5

[0095] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 3.0180E-01 -4.0313E-01 4.4893E-01 -3.5958E-01 2.0078E-01 -7.5389E-02 1.8032E-02 -2.4663E-03 1.4599E-04 S2 6.4607E-01 -2.0106E+00 9.2289E+00 -3.4362E+01 9.0388E+01 -1.5398E+02 1.5995E+02 -9.1137E+01 2.1662E+01 S3 -2.3490E-01 -1.0533E+00 1.7820E+01 -2.2365E+02 1.5208E+03 -5.2650E+03 7.0217E+03 0.0000E+00 0.0000E+00 S4 -1.1486E+00 6.2358E+00 -3.1456E+01 1.1168E+02 -2.4644E+02 2.9586E+02 -1.5607E+02 0.0000E+00 0.0000E+00 S5 -3.1754E-01 1.9199E+00 -7.7728E+00 2.4350E+01 -5.2039E+01 7.2849E+01 -6.4365E+01 3.2484E+01 -7.1021E+00 S6 -4.1852E-01 2.2469E+00 -2.0294E+01 7.3529E+01 -1.4605E+02 1.7588E+02 -1.2773E+02 5.1246E+01 -8.6884E+00 S7 5.1096E-01 -1.1155E+00 -1.9608E+00 1.4587E+01 -3.6381E+01 5.0965E+01 -4.1448E+01 1.8119E+01 -3.2804E+00 S8 -5.4863E-01 1.3429E+00 1.4312E+00 -9.8842E+00 1.7452E+01 -1.6290E+01 8.7496E+00 -2.5624E+00 3.1797E-01 S9 -3.9683E-01 8.1934E-01 -1.8966E+00 3.2393E+00 -3.5259E+00 2.3987E+00 -1.0047E+00 2.4085E-01 -2.5695E-02 S10 2.3443E-01 -9.3139E-01 1.3069E+00 -1.1303E+00 6.4069E-01 -2.3781E-01 5.5437E-02 -7.3270E-03 4.1692E-04

[0096] Table 6

[0097] Figure 6A The axial chromatic aberration curve of the imaging lens of Example 3 is shown, which indicates the deviation of the convergence point of light of different wavelengths passing through the lens. Figure 6B The astigmatism curve of the imaging lens of Example 3 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 6C The distortion curve of the camera lens of Example 3 is shown, which represents the distortion value corresponding to different field angles. Figures 6A to 6C It can be seen that the camera lens provided in Example 3 can achieve good imaging quality.

[0098] Example 4

[0099] The following reference Figures 7 to 8C The imaging lens according to Embodiment 4 of the present application is described. Figure 7 A schematic structural diagram of a camera lens according to Example 4 of the present application is shown.

[0100] like Figure 7 As shown, the camera lens includes, from the object side to the image side, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0101] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes through each surface S1 to S12 in sequence and is ultimately imaged on the imaging surface S13.

[0102] In this example, the total effective focal length f of the camera lens is 1.37 mm, and the maximum field of view FOV of the camera lens is 120.0°.

[0103] Table 7 shows the basic parameters of the camera lens of Example 4, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Table 8 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 4, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0104]

[0105] Table 7

[0106]

[0107]

[0108] Table 8

[0109] Figure 8A The axial chromatic aberration curve of the imaging lens of Example 4 is shown, which indicates the deviation of the convergence point of light of different wavelengths passing through the lens. Figure 8B The astigmatism curve of the imaging lens of Example 4 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 8C The distortion curve of the camera lens of Example 4 is shown, which represents the distortion value corresponding to different field angles. Figures 8A to 8C It can be seen that the camera lens provided in Example 4 can achieve good imaging quality.

[0110] Example 5

[0111] The following reference Figures 9 to 10C The imaging lens according to Embodiment 5 of the present application is described. Figure 9 A schematic structural diagram of a camera lens according to embodiment 5 of the present application is shown.

[0112] like Figure 9 As shown, the camera lens includes, from the object side to the image side, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0113] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes through each surface S1 to S12 in sequence and is ultimately imaged on the imaging surface S13.

[0114] In this example, the total effective focal length f of the camera lens is 1.58 mm, and the maximum field of view FOV of the camera lens is 120.0°.

[0115] Table 9 shows the basic parameters of the camera lens of Example 5, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Table 10 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 5, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0116]

[0117]

[0118] Table 9

[0119] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 3.8569E-02 -4.1365E-03 -4.6392E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 7.4794E-02 -3.1146E-03 -4.5612E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.4219E-01 7.9466E-01 -3.3654E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.4230E-01 -1.0517E-01 1.8346E-01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -5.5605E-03 -4.2049E-03 -6.2720E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -1.3950E-02 -4.9510E-03 -1.1353E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 5.7571E-04 -3.0835E-03 -2.1236E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 1.0575E-02 2.5707E-03 -1.3292E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 3.7738E-02 -2.7159E-03 -7.1115E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 3.9523E-03 4.7058E-03 2.3126E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0120] Table 10

[0121] Figure 10A The axial chromatic aberration curve of the imaging lens of Example 5 is shown, which indicates the deviation of the convergence point of light of different wavelengths passing through the back of the lens. Figure 10B The astigmatism curve of the imaging lens of Example 5 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 10C The distortion curve of the camera lens of Example 5 is shown, which represents the distortion value corresponding to different field angles. Figures 10A to 10CIt can be seen that the camera lens provided in Example 5 can achieve good imaging quality.

[0122] In summary, Examples 1 to 5 respectively satisfy the relationships shown in Table 11.

[0123]

[0124]

[0125] Table 11

[0126] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the camera lens described above.

[0127] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A camera lens, characterized in that: Along the optical axis from the object side to the image side, they include: a first lens having negative optical power and a concave object-side surface; a second lens having positive refractive power, whose object-side surface is concave and whose image-side surface is convex; a third lens element having positive optical power and a convex object-side surface; a fourth lens element having negative optical power and a concave object-side surface; and a fifth lens having positive refractive power; The distance TTL from the object side of the first lens to the imaging plane of the camera lens on the optical axis, the maximum half field angle Semi-FOV of the camera lens, and the F number Fno of the camera lens satisfy the following conditions: 4.85 mm ≤ TTL × Fno / tan (Semi-FOV) ≤ 7.11 mm. The effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy the following conditions: -3.05≤f1 / f3≤-1.67; The effective focal length f1 of the first lens, the effective focal length f3 of the third lens, and the center thickness CT3 of the third lens on the optical axis satisfy the following: -4.29≤(f1+f3) / CT3≤-2.25; and The number of lenses having optical power in the camera lens is five.

2. The imaging lens according to claim 1, wherein: The camera lens further includes an aperture located between the first lens and the second lens. The distance T1s between the image side surface of the first lens and the aperture on the optical axis, the distance T12 between the image side surface of the first lens and the object side surface of the second lens on the optical axis, and the distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the maximum effective radius vertex of the object side surface of the second lens on the optical axis satisfy: -1.75≤(T12-T1s) / SAG21≤-1.

57.

3. The camera lens according to claim 1, wherein: The camera lens further includes an aperture located between the first lens and the second lens. The maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DTs of the aperture, and the maximum effective radius DT52 of the image side surface of the fifth lens satisfy the following: 0.9<(DT11-DTs) / (DT52-DTs)<1.

2.

4. The imaging lens according to claim 1, wherein: The average value DT3 of the maximum effective radii of the object side surface and the image side surface of the third lens, the average value DT4 of the maximum effective radii of the object side surface and the image side surface of the fourth lens, and the maximum effective radius DT12 of the image side surface of the first lens satisfy the following conditions: 0.99≤(DT3+DT4) / (2×DT12)<1.

3.

5. The imaging lens according to claim 1, wherein: Half of the diagonal length ImgH of the effective pixel area on the imaging plane and the maximum effective radius DT11 of the object side surface of the first lens satisfy the following: 1.06≤ImgH / DT11≤1.

44.

6. The camera lens according to claim 1, wherein: The total effective focal length f of the camera lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy the following: 3.87≤(f2+f3) / f≤5.

67.

7. The imaging lens according to claim 1, wherein: The total effective focal length f of the camera lens and the center thickness CT5 of the fifth lens on the optical axis satisfy the following: 1.5<f / CT5≤2.

56.

8. The imaging lens according to claim 1, wherein: The effective focal length f2 of the second lens and the curvature radius R3 of the object-side surface of the second lens satisfy: -1.47≤f2 / R3<-0.

9.

9. The 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: 2.07≤(|R3|−R4) / (|R3|+R4)≤3.

07.

10. The imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the curvature radius R1 of the object-side surface of the first lens satisfy: 1.60≤f1 / R1≤3.

04.

11. The imaging lens according to claim 1, wherein: A curvature radius R5 of the object-side surface of the third lens and a center thickness CT3 of the third lens on the optical axis satisfy the following: 2.16≤R5 / CT3≤4.

72.

12. The camera lens according to any one of claims 1 to 11, wherein: The distance TTL from the object side of the first lens to the imaging plane of the camera lens on the optical axis, half the diagonal length of the effective pixel area on the imaging plane ImgH, and the entrance pupil diameter EPD of the camera lens satisfy the following conditions: 1.4 mm < TTL / (ImgH / EPD) ≤ 1.70 mm.

13. The imaging lens according to claim 11, wherein: The distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis, the center thickness CT1 of the first lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis satisfy the following conditions: 3.19≤TTL / (CT1+CT5)<3.5.

Images