Imaging lens group

Abstract

The present invention provides an imaging lens assembly. The imaging lens assembly includes: a first lens having positive focal power, whose object side surface is convex and whose imaging side surface is concave; a second lens having negative focal power, whose object side surface is convex and whose imaging side surface is concave; a third lens having positive focal power, whose object side surface is concave and whose imaging side surface is convex; a fourth lens having positive focal power, whose object side surface is convex and whose imaging side surface is convex; and a fifth lens having negative focal power; the Abbe number V1 of the first lens, the Abbe number V3 of the third lens, and the Abbe number V5 of the fifth lens satisfy the following relationship: 70 < (V1 + V3 + V5) / 3 < 85; and the air spacing T34 on the optical axis between the third lens and the fourth lens, the air spacing T45 on the optical axis between the fourth lens and the fifth lens, and the center thickness CT4 of the fourth lens and the center thickness CT5 of the fifth lens satisfy the following relationship: 1.4 < (T34 + T45) / (CT4 + CT5) < 1.8. The present invention solves the problem in the prior art that it is difficult to simultaneously achieve a large image surface, a large aperture and good chromatic aberration performance in an imaging lens assembly.

Description

[0001] This application is a divisional application of the patent application submitted to the State Intellectual Property Office of China on March 21, 2022, with application number 202210278678.0 and invention name “Imaging Lens Group”. Technical Field

[0002] The present invention relates to the technical field of optical imaging equipment, and in particular to an imaging lens assembly. Background Art

[0003] With the continuous development of science and technology, competition in the field of mobile phone cameras is becoming increasingly fierce, especially in the imaging lens groups of high-end flagship models. In addition to the demand for larger image surfaces and larger apertures, mobile phone manufacturers have increasingly higher requirements for the chromatic aberration of imaging lens groups. At the same time, they need to ensure good imaging quality. At the same time, the overall size of the imaging lens group must not be too large to facilitate its application in ultra-thin electronic products. This undoubtedly poses a higher difficulty challenge to the design of the imaging lens group.

[0004] That is to say, the imaging lens group in the prior art has the problem that it is difficult to simultaneously take into account a large image surface, a large aperture and good chromatic aberration performance. Summary of the Invention

[0005] The main purpose of the present invention is to provide an imaging lens assembly to solve the problem in the prior art that it is difficult to simultaneously achieve a large image surface, a large aperture and good chromatic aberration performance.

[0006] In order to achieve the above-mentioned object, the present invention provides an imaging lens group, which comprises, from the object side to the imaging side, a first lens with positive focal power, whose object side surface is convex and whose imaging side surface is concave; a second lens with negative focal power, whose object side surface is convex and whose imaging side surface is concave; a third lens with positive focal power, whose object side surface is concave and whose imaging side surface is convex; a fourth lens with positive focal power, whose object side surface is convex and whose imaging side surface is convex; a fifth lens with negative focal power, whose object side surface is convex and whose imaging side surface is concave; the imaging lens group comprises the first lens to the fifth lens. The optical system is composed of lenses, and at least three lenses among the first to fifth lenses are made of glass, and the Abbe number V1 of the first lens, the Abbe number V3 of the third lens, and the Abbe number V5 of the fifth lens satisfy the following: 70<(V1+V3+V5) / 3<85; the air gap T34 on the optical axis between the third lens and the fourth lens, the air gap T45 on the optical axis between the fourth lens and the fifth lens, and the center thickness CT4 of the fourth lens and the center thickness CT5 of the fifth lens satisfy the following: 1.4<(T34+T45) / (CT4+CT5)<1.8.

[0007] Furthermore, the on-axis distance TTL from the object side of the first lens to the imaging plane and half the diagonal length of the effective pixel area on the imaging plane ImgH satisfy the following relationship: TTL / ImgH<1.3.

[0008] Furthermore, the effective focal length f1 of the first lens, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy the following relationship: 0.9 <f3 / (f1+f4)<1.3。

[0009] Furthermore, the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens satisfy: 2.1 <f2 / f5<2.6。

[0010] Furthermore, the curvature radius R1 of the object side of the first lens, the curvature radius R2 of the imaging side of the first lens, the curvature radius R3 of the object side of the second lens and the curvature radius R4 of the imaging side of the second lens satisfy: 0.8<(R1+R2) / (R3+R4)<1.2.

[0011] Furthermore, the curvature radius R5 of the object side of the third lens and the curvature radius R6 of the imaging side of the third lens satisfy the following relationship: 5.0 <R5 / R6<5.6。

[0012] Furthermore, a curvature radius R7 of the object side surface of the fourth lens and a curvature radius R8 of the imaging side surface of the fourth lens satisfy the following relationship: 1.6<(R7-R8) / (R7+R8)<2.2.

[0013] Furthermore, the curvature radius R9 of the object side surface of the fifth lens and the curvature radius R10 of the imaging side surface of the fifth lens satisfy the following relationship: 3.2 <R9 / R10<4.2。

[0014] Furthermore, the composite focal length f123 of the first lens, the second lens, and the third lens, the center thickness CT1 of the first lens, the center thickness CT2 of the second lens, and the center thickness CT3 of the third lens satisfy the following relationship: 3.2 <f123 / (CT1+CT2+CT3)<3.8。

[0015] Furthermore, the composite focal length f45 of the fourth lens and the fifth lens, the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens, the on-axis distance SAG42 between the intersection of the imaging side surface of the fourth lens and the optical axis and the vertex of the effective radius of the imaging side surface of the fourth lens, the on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis and the vertex of the effective radius of the object side surface of the fifth lens, and the on-axis distance SAG52 between the intersection of the imaging side surface of the fifth lens and the optical axis and the vertex of the effective radius of the imaging side surface of the fifth lens satisfy the following conditions: 2.8 <f45 / (SAG41+SAG42+SAG51+SAG52)<3.4。

[0016] Furthermore, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, the edge thickness ET5 of the fifth lens and the edge thickness ET4 of the fourth lens satisfy the following relationship: 1.2<(ET4+ET5) / (ET2+ET3)<1.6.

[0017] The technical solution of the present invention is applied, and the imaging lens group includes, from the object side to the imaging side, a first lens with positive focal power, whose object side surface is convex and whose imaging side surface is concave; a second lens with negative focal power, whose object side surface is convex and whose imaging side surface is concave; a third lens with positive focal power, whose object side surface is concave and whose imaging side surface is convex; a fourth lens with positive focal power, whose object side surface is convex and whose imaging side surface is convex; a fifth lens with negative focal power, whose object side surface is convex and whose imaging side surface is concave; the imaging lens group from the first lens to the fifth lens group The optical system is composed of a plurality of optical lenses, and at least three of the first to fifth lenses are made of glass. Furthermore, the Abbe number V1 of the first lens, the Abbe number V3 of the third lens, and the Abbe number V5 of the fifth lens satisfy the following relationship: 70<(V1+V3+V5) / 3<85; the air gap T34 on the optical axis between the third lens and the fourth lens, the air gap T45 on the optical axis between the fourth lens and the fifth lens, and the center thickness CT4 of the fourth lens and the center thickness CT5 of the fifth lens satisfy the following relationship: 1.4<(T34+T45) / (CT4+CT5)<1.8.

[0018] By properly constraining the optical power and surface shape of each lens, a smooth transition of light is achieved, while also ensuring the large image area and large aperture of the imaging lens group, thereby ensuring excellent imaging quality. At least three of the first through fifth lens elements are made of glass, leveraging the high Abbe number of glass to achieve excellent color fringing and achieve superior imaging results. By properly constraining the relationship between the Abbe number V1 of the first lens element, the Abbe number V3 of the third lens element, and the Abbe number V5 of the fifth lens element, the degree of dispersion is properly controlled, improving the imaging lens group's ability to correct chromatic aberrations and achieving optimal imaging results. By constraining the relationship between the on-axis air gap T34 between the third and fourth lens elements, the on-axis air gap T45 between the fourth and fifth lens elements, and the center thickness CT4 of the fourth lens element and the center thickness CT5 of the fifth lens element, the field curvature contribution of each field of view of the imaging lens group is controlled within a reasonable range, balancing the field curvature contributed by other lens elements and effectively improving resolution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 FIG2 shows a schematic structural diagram of an imaging lens assembly according to a first embodiment of the present invention;

[0021] Figures 2 to 5 Shown respectively Figure 1 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the imaging lens group;

[0022] Figure 6 A schematic structural diagram of an imaging lens assembly according to a second embodiment of the present invention is shown;

[0023] Figures 7 to 10 Shown respectively Figure 6 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the imaging lens group;

[0024] Figure 11 A schematic structural diagram of an imaging lens assembly according to a third embodiment of the present invention is shown;

[0025] Figures 12 to 15 Shown respectively Figure 11 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the imaging lens group;

[0026] Figure 16 A schematic structural diagram of an imaging lens assembly according to a fourth embodiment of the present invention is shown;

[0027] Figures 17 to 20 Shown respectively Figure 16 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the imaging lens group;

[0028] Figure 21 A schematic structural diagram of an imaging lens assembly according to a fifth embodiment of the present invention is shown;

[0029] Figures 22 to 25 Shown respectively Figure 21 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the imaging lens group.

[0030] The above drawings include the following reference numerals:

[0031] STO, aperture; E1, first lens; S1, object side of the first lens; S2, imaging side of the first lens; E2, second lens; S3, object side of the second lens; S4, imaging side of the second lens; E3, third lens; S5, object side of the third lens; S6, imaging side of the third lens; E4, fourth lens; S7, object side of the fourth lens; S8, imaging side of the fourth lens; E5, fifth lens; S9, object side of the fifth lens; S10, imaging side of the fifth lens; E6, filter; S11, object side of the filter; S12, imaging side of the filter; S13, imaging surface. DETAILED DESCRIPTION

[0032] 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 invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0034] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0035] It should be noted that in this specification, the expressions first, second, third, etc. are only used to distinguish one feature from another, and do not represent any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0036] 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.

[0037] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object side is called the object side of the lens, and the surface of each lens closest to the imaging side is called the imaging side of the lens. The surface shape in the paraxial region can be judged according to the judgment method of common knowledge in this field, using the positive and negative R value (R refers to the radius of curvature of the paraxial region, usually refers to the R value in the lens database (lens data) in optical software) to determine the convexity and concavity. For the object side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the imaging side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0038] In order to solve the problem in the prior art that it is difficult to simultaneously achieve a large image surface, a large aperture and good chromatic aberration performance in an imaging lens assembly, the present invention provides an imaging lens assembly.

[0039] like Figures 1 to 25 As shown, the imaging lens group includes, from the object side to the imaging side, a first lens with positive focal power, whose object side surface is convex and whose imaging side surface is concave; a second lens with negative focal power, whose object side surface is convex and whose imaging side surface is concave; a third lens with positive focal power, whose object side surface is concave and whose imaging side surface is convex; a fourth lens with positive focal power, whose object side surface is convex and whose imaging side surface is convex; a fifth lens with negative focal power, whose object side surface is convex and whose imaging side surface is concave; the imaging lens group consists of the first to fifth lenses, and At least three of the first to fifth lenses are made of glass, and the Abbe number V1 of the first lens, the Abbe number V3 of the third lens, and the Abbe number V5 of the fifth lens satisfy the following relationship: 70<(V1+V3+V5) / 3<85; the air gap T34 on the optical axis between the third lens and the fourth lens, the air gap T45 on the optical axis between the fourth lens and the fifth lens, and the center thickness CT4 of the fourth lens and the center thickness CT5 of the fifth lens satisfy the following relationship: 1.4<(T34+T45) / (CT4+CT5)<1.8.

[0040] Preferably, 74<(V1+V3+V5) / 3<77.

[0041] Preferably, 1.5 < (T34 + T45) / (CT4 + CT5) < 1.7.

[0042] By reasonably constraining the optical power and surface shape of each lens, it is beneficial to the smooth transition of light, and at the same time, it is beneficial to ensure the characteristics of a large image plane and a large aperture of the imaging lens group, and it is beneficial to ensure that the imaging lens group has good imaging quality. At least 3 lenses among the first lens to the fifth lens are made of glass material, so that the good color edge performance can be achieved by using the characteristics of the high Abbe number of the glass material, thereby achieving a better imaging effect. By reasonably constraining the relationship among the Abbe number V1 of the first lens, the Abbe number V3 of the third lens, and the Abbe number V5 of the fifth lens, it is beneficial to reasonably control the chromatic dispersion degree of the system, improve the ability of the imaging lens group to correct chromatic aberration, and achieve a better imaging effect. By constraining the relationship among the air gap T34 between the third lens and the fourth lens on the optical axis, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the central thickness CT4 of the fourth lens, and the central thickness CT5 of the fifth lens, the field curvature contribution of each field of the imaging lens group is controlled within a reasonable range, the field curvature generated by other lenses is balanced, and the resolution is effectively improved.

[0043] In this embodiment, the on-axis distance TTL from the object side of the first lens to the imaging surface and half of the diagonal length ImgH of the effective pixel region on the imaging surface satisfy: TTL / ImgH < 1.3. By constraining the ratio of the on-axis distance TTL from the object side of the first lens to the imaging surface to half of the diagonal length ImgH of the effective pixel region on the imaging surface, it is beneficial to realize the ultra-thin characteristics and miniaturization of the imaging lens group, so that the imaging lens group of the present application can be applied to ultra-thin electronic products.

[0044] In this embodiment, the effective focal length f1 of the first lens, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens satisfy: 0.9 < f3 / (f1 + f4) < 1.3. Satisfying this conditional formula can effectively constrain the contribution of the three lenses to the aberration of the entire optical system, thereby improving the imaging quality of the imaging lens group. Preferably, 1.0 < f3 / (f1 + f4) < 1.2.

[0045] In this embodiment, the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens satisfy: 2.1 < f2 / f5 < 2.6. Satisfying this conditional formula can effectively reduce the optical sensitivity of the second lens and the fifth lens, and is more beneficial to mass production. Preferably, 2.3 < f2 / f5 < 2.5.

[0046] In this embodiment, the following relationship is satisfied among the radius of curvature R1 of the object side of the first lens, the radius of curvature R2 of the imaging side of the first lens, the radius of curvature R3 of the object side of the second lens, and the radius of curvature R4 of the imaging side of the second lens: 0.8 < (R1 + R2) / (R3 + R4) < 1.2. Meeting this conditional expression enables the imaging lens group to better achieve light path deflection and better balance the high-order spherical aberration generated by itself. Preferably, 0.9 < (R1 + R2) / (R3 + R4) < 1.1.

[0047] In this embodiment, the following relationship is satisfied between the radius of curvature R5 of the object side of the third lens and the radius of curvature R6 of the imaging side of the third lens: 5.0 < R5 / R6 < 5.6. Meeting this conditional expression can effectively balance the axial aberration generated by the imaging lens group. Preferably, 5.2 < R5 / R6 < 5.5.

[0048] In this embodiment, the following relationship is satisfied between the radius of curvature R7 of the object side of the fourth lens and the radius of curvature R8 of the imaging side of the fourth lens: 1.6 < (R7 - R8) / (R7 + R8) < 2.2. Meeting this conditional expression enables the imaging lens group to better achieve light path deflection, while ensuring that the fourth lens has good processability and reducing the system sensitivity. Preferably, 1.8 < (R7 - R8) / (R7 + R8) < 2.2.

[0049] In this embodiment, the following relationship is satisfied between the radius of curvature R9 of the object side of the fifth lens and the radius of curvature R10 of the imaging side of the fifth lens: 3.2 < R9 / R10 < 4.2. Meeting this conditional expression can effectively balance the axial aberration generated by the imaging lens group. Preferably, 3.4 < R9 / R10 < 4.0.

[0050] In this embodiment, the following relationship is satisfied among the combined focal length f123 of the first lens, the second lens, and the third lens, the central thickness CT1 of the first lens, the central thickness CT2 of the second lens, and the central thickness CT3 of the third lens: 3.2 < f123 / (CT1 + CT2 + CT3) < 3.8. Meeting this conditional expression can reduce the sensitivity of the previous lenses, ensure the processability, and improve the yield rate. Preferably, 3.4 < f123 / (CT1 + CT2 + CT3) < 3.7.

[0051] In this embodiment, the combined focal length f45 of the fourth lens and the fifth lens, the axial distance SAG41 between the intersection point of the object side of the fourth lens and the optical axis and the vertex of the effective radius of the object side of the fourth lens, the axial distance SAG42 between the intersection point of the imaging side of the fourth lens and the optical axis and the vertex of the effective radius of the imaging side of the fourth lens, the axial distance SAG51 between the intersection point of the object side of the fifth lens and the optical axis and the vertex of the effective radius of the object side of the fifth lens, and the axial distance SAG52 between the intersection point of the imaging side of the fifth lens and the optical axis and the vertex of the effective radius of the imaging side of the fifth lens satisfy: 2.8 < f45 / (SAG41 + SAG42 + SAG51 + SAG52) < 3.4. Satisfying this conditional formula is beneficial to ensuring the processing, shaping, and assembly of the fourth lens and the fifth lens, so as to obtain good imaging quality. An unreasonable ratio may lead to difficulties in adjusting the shaped surface profile, obvious deformation after assembly, and thus the imaging quality cannot be ensured. Preferably, 2.9 < f45 / (SAG41 + SAG42 + SAG51 + SAG52) < 3.3.

[0052] In this embodiment, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, the edge thickness ET5 of the fifth lens, and the edge thickness ET4 of the fourth lens satisfy: 1.2 < (ET4 + ET5) / (ET2 + ET3) < 1.6. Satisfying this conditional formula can reasonably control the uniformity of the lens shape transition and the reliability of subsequent shaping and assembly by controlling the edge thicknesses of the second lens to the fifth lens; at the same time, it can also reasonably limit the range of incident light, reduce off-axis aberration, and is beneficial to reducing the system sensitivity. Preferably, 1.3 < (ET4 + ET5) / (ET2 + ET3) < 1.5.

[0053] Optionally, the above imaging lens group may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0054] The imaging lens group in this application can use multiple lenses, such as the five lenses mentioned above. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial distance between each lens, etc., the aperture of the imaging lens group can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, making the imaging lens group more conducive to production and processing and applicable to portable electronic devices such as smartphones. The above imaging lens group also has the advantages of being ultra-thin and having good imaging quality, and can meet the requirements of miniaturization of intelligent electronic products.

[0055] In this application, at least one of the lens surfaces is an aspherical surface. Aspherical lenses are characterized by a continuously varying curvature from the lens center to the lens periphery. Unlike spherical lenses, which have a constant curvature from the lens center to the lens periphery, aspherical lenses have a more optimized curvature radius, offering advantages in reducing distortion and astigmatism. The use of aspherical lenses can minimize aberrations that occur during imaging, thereby improving image quality.

[0056] However, those skilled in the art will appreciate that the number of lenses comprising the imaging lens assembly 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 an imaging lens assembly using five lenses as an example, the imaging lens assembly is not limited to five lenses. If desired, the imaging lens assembly can also include other numbers of lenses.

[0057] The following further describes examples of specific surface shapes and parameters of the imaging lens assembly applicable to the above-mentioned embodiment with reference to the accompanying drawings.

[0058] It should be noted that any one of the following embodiments 1 to 5 is applicable to all implementation methods of the present application.

[0059] Example 1

[0060] like Figures 1 to 5 As shown, the imaging lens group of embodiment 1 of the present application is described. Figure 1 A schematic diagram showing the structure of the imaging lens group of embodiment 1 is shown.

[0061] like Figure 1 As shown, the imaging lens group includes, from the object side to the imaging side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0062] The first lens E1 has positive power, with its object-side surface S1 being convex and its imaging-side surface S2 being concave. The second lens E2 has negative power, with its object-side surface S3 being convex and its imaging-side surface S4 being concave. The third lens E3 has positive power, with its object-side surface S5 being concave and its imaging-side surface S6 being convex. The fourth lens E4 has positive power, with its object-side surface S7 being convex and its imaging-side surface S8 being convex. The fifth lens E5 has negative power, with its object-side surface S9 being convex and its imaging-side surface S10 being concave. The filter E6 has an object-side surface S11 and an imaging-side surface S12. Light from an object sequentially passes through surfaces S1 to S12 and is ultimately imaged on imaging surface S13.

[0063] In this embodiment, the total effective focal length f of the imaging lens assembly is 5.58 mm, the total length TTL of the imaging lens assembly is 6.53 mm, and the image height ImgH is 5.29 mm.

[0064] Table 1 shows the basic structural parameters of the imaging lens assembly of Example 1, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0065]

[0066]

[0067] Table 1

[0068] In Example 1, the object-side surface and the image-side surface of any lens from the first lens E1 to the fifth lens E5 are both aspherical surfaces. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0069]

[0070] Where x is the distance vector 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 radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspheric surface. Table 2 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspheric mirror surface S1-S10 in Example 1.

[0071] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.4364E-03 1.6713E-02 -5.2644E-02 1.0430E-01 -1.2856E-01 9.9307E-02 -4.6692E-02 S2 -2.5790E-02 1.7174E-02 2.3746E-02 -8.6625E-02 1.2714E-01 -1.0751E-01 5.3091E-02 S3 -5.4271E-02 5.8523E-02 -2.1241E-02 -1.9266E-02 4.3085E-02 -3.9571E-02 2.0489E-02 S4 -3.6292E-02 4.9832E-02 -2.5128E-02 3.4140E-02 -8.9355E-02 1.3499E-01 -1.0874E-01 S5 -4.8295E-02 -5.9660E-03 4.5836E-02 -1.9896E-01 4.2105E-01 -5.2016E-01 3.7458E-01 S6 -3.2119E-02 -1.3256E-02 3.1030E-02 -5.6737E-02 6.0560E-02 -4.0163E-02 1.6426E-02 S7 -6.0965E-03 2.5878E-04 -7.6645E-03 1.3368E-02 -1.3843E-02 8.4811E-03 -3.2431E-03 S8 -8.2782E-03 -7.1179E-03 1.7654E-02 -1.6883E-02 8.7582E-03 -2.8707E-03 6.3149E-04 S9 -1.8897E-01 5.3244E-02 1.5257E-02 -2.3960E-02 1.2093E-02 -3.5757E-03 6.9844E-04 S10 -2.1210E-01 1.1440E-01 -4.9709E-02 1.6500E-02 -4.1342E-03 7.7977E-04 -1.1038E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.2200E-02 -1.3606E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -1.4133E-02 1.5525E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -5.5838E-03 5.9920E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 4.5041E-02 -7.5138E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -1.4620E-01 2.3991E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -3.8386E-03 4.0364E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 7.9207E-04 -1.2226E-04 1.1281E-05 -5.2614E-07 4.5210E-09 3.5876E-10 0.0000E+00 S8 -9.4224E-05 9.3189E-06 -5.7037E-07 1.7801E-08 -6.0607E-11 -8.0295E-12 0.0000E+00 S9 -9.4645E-05 9.0758E-06 -6.1586E-07 2.8987E-08 -9.0156E-10 1.6681E-11 -1.3915E-13 S10 1.1664E-05 -9.1119E-07 5.1736E-08 -2.0720E-09 5.5446E-11 -8.8991E-13 6.4837E-15

[0072] Table 2

[0073] Figure 2 The axial chromatic aberration curve of the imaging lens assembly of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the imaging lens assembly. Figure 3 The astigmatism curve of the imaging lens assembly of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 4 The distortion curve of the imaging lens assembly of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 5 The chromatic aberration curve of the imaging lens assembly of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the imaging lens assembly.

[0074] according to Figures 2 to 5 It can be seen that the imaging lens assembly provided in Example 1 can achieve good imaging quality.

[0075] Example 2

[0076] like Figures 6 to 10 FIG2 shows an imaging lens assembly according to the second embodiment of the present application. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in the first embodiment will be omitted. Figure 6 A schematic diagram showing the structure of the imaging lens group of the second embodiment is shown.

[0077] like Figure 6 As shown, the imaging lens group includes, from the object side to the imaging side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0078] The first lens E1 has positive power, with its object-side surface S1 being convex and its imaging-side surface S2 being concave. The second lens E2 has negative power, with its object-side surface S3 being convex and its imaging-side surface S4 being concave. The third lens E3 has positive power, with its object-side surface S5 being concave and its imaging-side surface S6 being convex. The fourth lens E4 has positive power, with its object-side surface S7 being convex and its imaging-side surface S8 being convex. The fifth lens E5 has negative power, with its object-side surface S9 being convex and its imaging-side surface S10 being concave. The filter E6 has an object-side surface S11 and an imaging-side surface S12. Light from an object sequentially passes through surfaces S1 to S12 and is ultimately imaged on imaging surface S13.

[0079] In this embodiment, the total effective focal length f of the imaging lens assembly is 5.57 mm, the total length TTL of the imaging lens assembly is 6.47 mm, and the image height ImgH is 5.30 mm.

[0080] Table 3 shows the basic structural parameters of the imaging lens assembly of Example 2, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0081]

[0082] Table 3

[0083] Table 4 shows the high-order coefficients of each aspheric mirror surface that can be used in the second embodiment, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in the first embodiment.

[0084] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.6534E-03 1.6920E-02 -5.2748E-02 1.0379E-01 -1.2761E-01 9.8570E-02 -4.6410E-02 S2 -2.4238E-02 1.0713E-02 4.3643E-02 -1.3032E-01 1.8777E-01 -1.5942E-01 7.9663E-02 S3 -5.3819E-02 5.8025E-02 -2.2942E-02 -7.8583E-03 1.8538E-02 -1.1220E-02 1.8722E-03 S4 -3.7801E-02 6.2867E-02 -8.8778E-02 2.2532E-01 -4.3642E-01 5.2186E-01 -3.6763E-01 S5 -5.2147E-02 1.1199E-02 -3.6324E-02 3.0111E-02 2.7442E-02 -1.0107E-01 1.0540E-01 S6 -3.4811E-02 -9.0470E-03 2.0734E-02 -4.3249E-02 4.9848E-02 -3.5176E-02 1.5232E-02 S7 -7.1748E-03 1.2137E-03 -9.5708E-03 1.6143E-02 -1.6346E-02 9.9131E-03 -3.7815E-03 S8 -9.1857E-03 -5.3007E-03 1.5100E-02 -1.4593E-02 7.5022E-03 -2.4357E-03 5.3344E-04 S9 -2.0428E-01 6.5540E-02 8.8390E-03 -2.1233E-02 1.1155E-02 -3.3296E-03 6.5090E-04 S10 -2.2731E-01 1.2642E-01 -5.6187E-02 1.9046E-02 -4.8741E-03 9.3869E-04 -1.3559E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.2151E-02 -1.3581E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -2.1568E-02 2.4254E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 9.7790E-04 -3.6710E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.4047E-01 -2.2403E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -5.0802E-02 9.6902E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -3.7656E-03 4.2094E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 9.2582E-04 -1.4368E-04 1.3346E-05 -6.2549E-07 5.1277E-09 4.5014E-10 0.0000E+00 S8 -7.9719E-05 7.9363E-06 -4.9069E-07 1.5467E-08 -4.6746E-11 -7.5118E-12 0.0000E+00 S9 -8.7972E-05 8.3998E-06 -5.6707E-07 2.6543E-08 -8.2084E-10 1.5102E-11 -1.2528E-13 S10 1.4610E-05 -1.1628E-06 6.7212E-08 -2.7377E-09 7.4433E-11 -1.2123E-12 8.9510E-15

[0085] Table 4

[0086] Figure 7The axial chromatic aberration curve of the imaging lens assembly of Example 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the imaging lens assembly. Figure 8 The astigmatism curve of the imaging lens assembly of Example 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 9 The distortion curve of the imaging lens assembly of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 10 The chromatic aberration curve of the imaging lens assembly of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the imaging lens assembly.

[0087] according to Figures 7 to 10 It can be seen that the imaging lens assembly provided in the second embodiment can achieve good imaging quality.

[0088] Example 3

[0089] like Figures 11 to 15 As shown, the imaging lens group of embodiment 3 of the present application is described. Figure 11 A schematic diagram showing the structure of the imaging lens group of embodiment three is shown.

[0090] like Figure 11 As shown, the imaging lens group includes, from the object side to the imaging side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0091] The first lens E1 has positive power, with its object-side surface S1 being convex and its imaging-side surface S2 being concave. The second lens E2 has negative power, with its object-side surface S3 being convex and its imaging-side surface S4 being concave. The third lens E3 has positive power, with its object-side surface S5 being concave and its imaging-side surface S6 being convex. The fourth lens E4 has positive power, with its object-side surface S7 being convex and its imaging-side surface S8 being convex. The fifth lens E5 has negative power, with its object-side surface S9 being convex and its imaging-side surface S10 being concave. The filter E6 has an object-side surface S11 and an imaging-side surface S12. Light from an object sequentially passes through surfaces S1 to S12 and is ultimately imaged on imaging surface S13.

[0092] In this embodiment, the total effective focal length f of the imaging lens assembly is 5.56 mm, the total length TTL of the imaging lens assembly is 6.47 mm, and the image height ImgH is 5.34 mm.

[0093] Table 5 shows the basic structural parameters of the imaging lens assembly of Example 3, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0094]

[0095] Table 5

[0096] Table 6 shows the high-order coefficients of each aspheric mirror surface that can be used in the third embodiment, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in the first embodiment above.

[0097]

[0098]

[0099] Table 6

[0100] Figure 12 The axial chromatic aberration curve of the imaging lens assembly of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the imaging lens assembly. Figure 13 The astigmatism curve of the imaging lens assembly of Example 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 14 The distortion curve of the imaging lens assembly of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 15 The chromatic aberration curve of the imaging lens assembly of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the imaging lens assembly.

[0101] according to Figures 12 to 15 It can be seen that the imaging lens assembly provided in the third embodiment can achieve good imaging quality.

[0102] Example 4

[0103] like Figures 16 to 20 As shown, the imaging lens group of the fourth embodiment of the present application is described. Figure 16 A schematic diagram showing the structure of the imaging lens group of embodiment 4 is shown.

[0104] like Figure 16 As shown, the imaging lens group includes, from the object side to the imaging side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0105] The first lens E1 has positive power, with its object-side surface S1 being convex and its imaging-side surface S2 being concave. The second lens E2 has negative power, with its object-side surface S3 being convex and its imaging-side surface S4 being concave. The third lens E3 has positive power, with its object-side surface S5 being concave and its imaging-side surface S6 being convex. The fourth lens E4 has positive power, with its object-side surface S7 being convex and its imaging-side surface S8 being convex. The fifth lens E5 has negative power, with its object-side surface S9 being convex and its imaging-side surface S10 being concave. The filter E6 has an object-side surface S11 and an imaging-side surface S12. Light from an object sequentially passes through surfaces S1 to S12 and is ultimately imaged on imaging surface S13.

[0106] In this embodiment, the total effective focal length f of the imaging lens assembly is 5.56 mm, the total length TTL of the imaging lens assembly is 6.48 mm, and the image height ImgH is 5.23 mm.

[0107] Table 7 shows the basic structural parameters of the imaging lens assembly of Example 4, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0108]

[0109]

[0110] Table 7

[0111] Table 8 shows the high-order coefficients of each aspheric mirror surface that can be used in the fourth embodiment, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in the first embodiment above.

[0112] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.5629E-03 1.4495E-02 -4.1936E-02 7.9900E-02 -9.6912E-02 7.4555E-02 -3.5101E-02 S2 -2.0335E-02 2.6226E-03 6.8096E-02 -1.8299E-01 2.5717E-01 -2.1506E-01 1.0617E-01 S3 -4.5734E-02 4.9803E-02 -1.2337E-02 -3.1510E-02 5.6456E-02 -4.7600E-02 2.2332E-02 S4 -3.2413E-02 6.8228E-02 -1.3663E-01 3.5528E-01 -6.4681E-01 7.3329E-01 -4.9600E-01 S5 -5.3316E-02 2.7497E-02 -1.0256E-01 2.0135E-01 -2.6504E-01 2.2183E-01 -1.1423E-01 S6 -3.7352E-02 2.3879E-03 -1.0971E-02 9.5836E-03 -5.8277E-03 1.8178E-03 2.2367E-04 S7 -1.2646E-02 7.7299E-03 -1.3835E-02 1.7440E-02 -1.6163E-02 9.5848E-03 -3.6424E-03 S8 -1.9475E-02 5.9467E-03 6.5067E-03 -9.9412E-03 5.7033E-03 -1.9311E-03 4.3025E-04 S9 -2.2264E-01 7.9820E-02 1.4367E-03 -1.8690E-02 1.0545E-02 -3.2190E-03 6.3455E-04 S10 -2.3903E-01 1.3491E-01 -6.0204E-02 2.0349E-02 -5.1711E-03 9.8670E-04 -1.4107E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 9.1942E-03 -1.0267E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -2.8461E-02 3.1785E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -5.2745E-03 4.3558E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.8350E-01 -2.8523E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 3.2430E-02 -3.7124E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -3.7801E-04 9.6663E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 8.9304E-04 -1.3894E-04 1.2939E-05 -6.0767E-07 4.9875E-09 4.3901E-10 0.0000E+00 S8 -6.4570E-05 6.4042E-06 -3.9222E-07 1.2150E-08 -2.8509E-11 -6.0696E-12 0.0000E+00 S9 -8.5946E-05 8.1962E-06 -5.5149E-07 2.5690E-08 -7.8981E-10 1.4433E-11 -1.1884E-13 S10 1.5046E-05 -1.1864E-06 6.8031E-08 -2.7543E-09 7.4595E-11 -1.2131E-12 8.9630E-15

[0113] Table 8

[0114] Figure 17 The axial chromatic aberration curve of the imaging lens assembly of Example 4 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the imaging lens assembly. Figure 18 The astigmatism curve of the imaging lens group of Example 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 19 The distortion curve of the imaging lens assembly of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 20 The chromatic aberration curve of the imaging lens assembly of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the imaging lens assembly.

[0115] according to Figures 17 to 20It can be seen that the imaging lens assembly provided in Example 4 can achieve good imaging quality.

[0116] Example 5

[0117] like Figures 21 to 25 As shown, the imaging lens group of embodiment 5 of the present application is described. Figure 21 A schematic diagram showing the structure of the imaging lens group of embodiment 5 is shown.

[0118] like Figure 21 As shown, the imaging lens group includes, from the object side to the imaging side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0119] The first lens E1 has positive power, with its object-side surface S1 being convex and its imaging-side surface S2 being concave. The second lens E2 has negative power, with its object-side surface S3 being convex and its imaging-side surface S4 being concave. The third lens E3 has positive power, with its object-side surface S5 being concave and its imaging-side surface S6 being convex. The fourth lens E4 has positive power, with its object-side surface S7 being convex and its imaging-side surface S8 being convex. The fifth lens E5 has negative power, with its object-side surface S9 being convex and its imaging-side surface S10 being concave. The filter E6 has an object-side surface S11 and an imaging-side surface S12. Light from an object sequentially passes through surfaces S1 to S12 and is ultimately imaged on imaging surface S13.

[0120] In this embodiment, the total effective focal length f of the imaging lens assembly is 5.56 mm, the total length TTL of the imaging lens assembly is 6.48 mm, and the image height ImgH is 5.10 mm.

[0121] Table 9 shows the basic structural parameters of the imaging lens assembly of Example 5, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0122]

[0123] Table 9

[0124] Table 10 shows the high-order coefficients of each aspheric mirror surface that can be used in the fifth embodiment, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in the first embodiment above.

[0125] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.4557E-03 1.3703E-02 -3.8223E-02 6.9689E-02 -8.0797E-02 5.9782E-02 -2.7285E-02 S2 -2.3550E-02 8.9706E-03 5.5637E-02 -1.6276E-01 2.3539E-01 -2.0044E-01 1.0037E-01 S3 -5.1283E-02 5.6405E-02 -1.6531E-02 -3.2103E-02 6.2083E-02 -5.5280E-02 2.7780E-02 S4 -3.4351E-02 5.3248E-02 -4.7191E-02 1.0438E-01 -2.2838E-01 3.0348E-01 -2.2990E-01 S5 -5.1381E-02 9.1098E-03 -2.1546E-02 -1.0807E-02 8.0788E-02 -1.2959E-01 1.0171E-01 S6 -3.6953E-02 3.0816E-03 -1.8908E-02 3.2279E-02 -3.8335E-02 2.8247E-02 -1.2130E-02 S7 -1.1442E-02 6.6765E-03 -1.4216E-02 1.9149E-02 -1.7925E-02 1.0586E-02 -3.9927E-03 S8 -1.6825E-02 3.4907E-03 7.3399E-03 -9.4780E-03 5.0223E-03 -1.5596E-03 3.1384E-04 S9 -2.1662E-01 7.4431E-02 4.6717E-03 -2.0166E-02 1.1045E-02 -3.3397E-03 6.5501E-04 S10 -2.3433E-01 1.3055E-01 -5.7458E-02 1.9096E-02 -4.7543E-03 8.8514E-04 -1.2292E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 6.9802E-03 -7.6640E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -2.7247E-02 3.0817E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -7.3122E-03 7.5364E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 9.2475E-02 -1.5311E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -4.0877E-02 6.8177E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 2.7145E-03 -2.2498E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 9.7025E-04 -1.4949E-04 1.3763E-05 -6.3518E-07 4.5913E-09 4.7789E-10 0.0000E+00 S8 -4.1965E-05 3.6745E-06 -1.9841E-07 5.5161E-09 -1.9065E-11 -2.0254E-12 0.0000E+00 S9 -8.8391E-05 8.4023E-06 -5.6358E-07 2.6170E-08 -8.0188E-10 1.4602E-11 -1.1978E-13 S10 1.2667E-05 -9.5936E-07 5.2476E-08 -2.0106E-09 5.1077E-11 -7.7155E-13 5.2405E-15

[0126] Table 10

[0127] Figure 22The axial chromatic aberration curve of the imaging lens assembly of Example 5 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the imaging lens assembly. Figure 23 The astigmatism curve of the imaging lens group of Example 5 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 24 The distortion curve of the imaging lens assembly of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 25 The chromatic aberration curve of the imaging lens assembly of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the imaging lens assembly.

[0128] according to Figures 22 to 25 It can be seen that the imaging lens assembly provided in Example 5 can achieve good imaging quality.

[0129] In summary, Examples 1 to 5 respectively satisfy the relationships shown in Table 11.

[0130]

[0131]

[0132] Table 11

[0133] Table 12 shows the effective focal length f of the imaging lens group of Examples 1 to 5, and the effective focal lengths f1 to f5 of each lens.

[0134] Parameters / Example 1 2 3 4 5 f1(mm) 4.86 4.85 4.88 4.87 4.87 f2(mm) -9.17 -9.22 -9.41 -9.38 -9.35 f3(mm) 14.17 14.67 15.23 15.40 15.56 f4(mm) 8.27 8.23 8.28 8.50 8.40 f5(mm) -3.87 -3.87 -3.93 -4.06 -4.04 f(mm) 5.58 5.57 5.56 5.56 5.56 TTL(mm) 6.53 6.47 6.47 6.48 6.48 ImgH(mm) 5.29 5.30 5.34 5.23 5.10

[0135] Table 12

[0136] 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 imaging lens assembly described above.

[0137] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0138] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0139] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0140] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An imaging lens assembly, characterized in that: From the object side to the imaging side, it includes: a first lens having positive power, the object side surface of which is convex and the image side surface of which is concave; a second lens element having negative optical power, the object side of which is convex and the image side of which is concave; A third lens element with positive power, whose object side surface is concave and image side surface is convex; a fourth lens element having positive power, the object side surface of which is convex and the image side surface of which is convex; A fifth lens element with negative optical power, whose object-side surface is convex and whose image-forming side surface is concave; The imaging lens group consists of the first lens to the fifth lens, and at least three lenses among the first lens to the fifth lens are made of glass, and, The Abbe number V1 of the first lens, the Abbe number V3 of the third lens, and the Abbe number V5 of the fifth lens satisfy the following relationship: 74.33≤(V1+V3+V5) / 3≤76.30; the air gap T34 on the optical axis between the third lens and the fourth lens, the air gap T45 on the optical axis between the fourth lens and the fifth lens, and the center thickness CT4 of the fourth lens and the center thickness CT5 of the fifth lens satisfy the following relationship: 1.59≤(T34+T45) / (CT4+CT5)≤1.68; A curvature radius R9 of the object side surface of the fifth lens and a curvature radius R10 of the imaging side surface of the fifth lens satisfy the following relationship: 3.45≤R9 / R10≤3.

95.

2. The imaging lens assembly according to claim 1, wherein: The on-axis distance TTL from the object side of the first lens to the imaging plane and half the diagonal length of the effective pixel area on the imaging plane ImgH satisfy the following: 1.21≤TTL / ImgH≤1.

27.

3. The imaging lens assembly according to claim 1, wherein: The effective focal length f1 of the first lens, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens satisfy the following: 1.08≤f3 / (f1+f4)≤1.

17.

4. The imaging lens assembly according to claim 1, wherein: The effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens satisfy the following: 2.31≤f2 / f5≤2.

39.

5. The imaging lens assembly according to claim 1, wherein: The curvature radius R1 of the object side of the first lens, the curvature radius R2 of the imaging side of the first lens, the curvature radius R3 of the object side of the second lens and the curvature radius R4 of the imaging side of the second lens satisfy: 0.92≤(R1+R2) / (R3+R4)≤1.

00.

6. The imaging lens assembly according to claim 1, wherein: A curvature radius R5 of the object side surface of the third lens and a curvature radius R6 of the imaging side surface of the third lens satisfy the following relationship: 5.25≤R5 / R6≤5.

47.

7. The imaging lens assembly according to claim 1, wherein: A curvature radius R7 of the object side surface of the fourth lens and a curvature radius R8 of the imaging side surface of the fourth lens satisfy the following relationship: 1.88≤(R7-R8) / (R7+R8)≤2.

10.

8. The imaging lens assembly according to claim 1, wherein: The composite focal length f123 of the first lens, the second lens and the third lens, the center thickness CT1 of the first lens, the center thickness CT2 of the second lens and the center thickness CT3 of the third lens satisfy: 3.42≤f123 / (CT1+CT2+CT3)≤3.

60.

9. The imaging lens assembly according to claim 1, wherein: The combined focal length f45 of the fourth lens and the fifth lens, the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the effective radius vertex of the object side surface of the fourth lens, the on-axis distance SAG42 between the intersection of the imaging side surface of the fourth lens and the optical axis and the effective radius vertex of the imaging side surface of the fourth lens, the on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis and the effective radius vertex of the object side surface of the fifth lens, and the on-axis distance SAG52 between the intersection of the imaging side surface of the fifth lens and the optical axis and the effective radius vertex of the imaging side surface of the fifth lens satisfy the following: 2.96≤f45 / (SAG41+SAG42+SAG51+SAG52)≤3.

24.

10. The imaging lens assembly according to claim 1, wherein: The edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, the edge thickness ET5 of the fifth lens and the edge thickness ET4 of the fourth lens satisfy the following: 1.40≤(ET4+ET5) / (ET2+ET3)≤1.47.

Images