Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises at least two lenses and an infrared filter. The at least two lenses are arranged in sequence from an object side to an image side along an optical axis, the first lens is closest to the object side, and the i-th lens is closest to the image side. The i-th lens is attached to the infrared filter. At least one of the object side surface and the image side surface of the i-th lens is aspherical and has at least one inflection point. The effective focal length fi of the i-th lens, the effective focal length f of the optical imaging lens and the aperture value fno of the optical imaging lens satisfy the condition: -26 < fi / f / fno < 35.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical elements, and more particularly, to an optical imaging lens. BACKGROUND

[0002] In recent years, the technology develops rapidly. With the continuous upgrading of consumer electronic products and the increasing demand of people for product imaging, the market requirements for the camera lens mounted on these products are also getting higher and higher. As we all know, a larger sensor will obtain a purer photo, because it can effectively improve the photosensitive performance and reduce the picture noise, and in the high dynamic range, it can also clearly present the details of the image highlights and dark areas. Therefore, in terms of imaging results, large-size sensors have significant advantages. Therefore, mobile phone manufacturers are also constantly increasing the size of the "bottom", that is, increasing the size of the photosensitive chip as the imaging medium, in order to obtain better imaging quality.

[0003] However, the application of large-size sensors also has some problems. For example, in order to accommodate larger-size sensors, the volume of the camera and the lens will also increase exponentially, and in order to make the light evenly spread on the sensor, the complex optical design will also make the weight of the lens increase exponentially. Therefore, how to design an optical imaging lens that can not only guarantee large bottom, good illumination and imaging quality, but also has small volume and weight, and can be better applied to light and thin portable electronic products, has become one of the technical problems that the technical personnel in the field need to solve at present. SUMMARY

[0004] The present application provides an optical imaging lens, which can include at least two lenses and an infrared filter, wherein the at least two lenses are arranged in order from the object side to the image side along the optical axis, the first lens is closest to the object side, and the ith lens is closest to the image side; the ith lens is attached to the infrared filter; and at least one of the object side surface and the image side surface of the ith lens is aspherical and has at least one inflection point. The effective focal length fi of the ith lens, the effective focal length f of the optical imaging lens, and the aperture value fno of the optical imaging lens can satisfy: -26 < fi / f / fno < 35.

[0005] In one embodiment, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH, the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis, and the refractive index Ni of the ith lens can satisfy: 0.8 < ImgH / TTL x Ni < 1.5.

[0006] In one embodiment, the optical imaging lens comprises a second lens located on the image side of the first lens and adjacent to the first lens, and the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -5 < (f1-f2) / (f1+f2) < 3.

[0007] In one embodiment, the optical imaging lens comprises an (i-1)th lens located on the object side of the ith lens and adjacent to the ith lens, and the curvature radius R j-1 of the object side surface of the (i-1)th lens and the curvature radius R j of the image side surface of the (i-1)th lens satisfy: -10 < (R j-1 - R j ) / (R j-1 + R j )< 2, where j = 2 x (i-1).

[0008] In one embodiment, the curvature radius R2 of the image side surface of the first lens, the curvature radius R1 of the object side surface of the first lens, the curvature radius R j of the image side surface of the (i-1)th lens, and the curvature radius R j-1 of the object side surface of the (i-1)th lens satisfy: -1 < (R2 / R1)-(R j / R j-1 )< 10, where j = 2 x (i-1).

[0009] In one embodiment, the sum ∑CT of the central thicknesses of the first lens to the ith lens on the optical axis and half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH satisfy: 0.5 < ∑CT / ImgH < 1.2.

[0010] In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CTi of the ith lens on the optical axis satisfy: 1 < CT1 / CTi < 8.

[0011] In one embodiment, the distance Tb from the image side surface of the (i-1)th lens to the object side surface of the ith lens along the optical axis and the central thickness CTi of the ith lens on the optical axis satisfy: 0.9 < Tb / CTi < 11.

[0012] In one embodiment, the maximum value CTmax of the central thicknesses of the first lens to the ith lens on the optical axis satisfy: 0.6 mm < CTmax < 1.1 mm.

[0013] In one embodiment, the maximum value ETmax in the edge thickness of each lens from the first lens to the ith lens satisfies: 0.5 < CTmax / ETmax < 3.

[0014] In one embodiment, the number V of lenses with Abbe number less than 40 in the optical imaging lens 40 may satisfy: V 40 ≥ 1.

[0015] In one embodiment, the shape of the ith lens is formed by pressing after the ith lens is pasted onto the infrared filter.

[0016] In one embodiment, the material of the ith lens is a force-deformable material.

[0017] In one embodiment, the material of the ith lens is plastic or glue.

[0018] In one embodiment, the material of the infrared filter is glass.

[0019] The optical imaging lens provided in the present application comprises at least two optical lenses and an infrared filter, wherein the infrared filter is pasted with the ith lens closest to the image side, and at least one of the object side and the image side of the ith lens closest to the image side is aspherical and has at least one inflection point; meanwhile, the effective focal length fi of the ith lens, the effective focal length f of the optical imaging lens, and the aperture value fno of the optical imaging lens satisfy the condition formula -26 < fi / f / fno < 35, through such setting of the optical imaging lens, the process of the lens closest to the image side can be ensured under the premise of ensuring a large aperture, the aperture of the lens closest to the image side can be limited, the system can be light and thin, and miniaturization can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0021] Figure 1 A structure schematic diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0022] Figures 2 to 5 Axial chromatic aberration curves, magnification chromatic aberration curves, astigmatism curves, and distortion curves of the optical imaging lens of Embodiment 1 are shown respectively;

[0023] Figure 6 A structure schematic diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0024] Figures 7 to 10On-axis chromatic aberration curves, lateral chromatic aberration curves, astigmatism curves and distortion curves of the optical imaging lens of embodiment 2 are respectively shown;

[0025] Figure 11 A structural schematic diagram of an optical imaging lens according to embodiment 3 of the present application is shown;

[0026] Figures 12 to 15 On-axis chromatic aberration curves, lateral chromatic aberration curves, astigmatism curves and distortion curves of the optical imaging lens of embodiment 3 are respectively shown;

[0027] Figure 16 A structural schematic diagram of an optical imaging lens according to embodiment 4 of the present application is shown;

[0028] Figures 17 to 20 On-axis chromatic aberration curves, lateral chromatic aberration curves, astigmatism curves and distortion curves of the optical imaging lens of embodiment 4 are respectively shown;

[0029] Figure 21 A structural schematic diagram of an optical imaging lens according to embodiment 5 of the present application is shown;

[0030] Figures 22 to 25 On-axis chromatic aberration curves, lateral chromatic aberration curves, astigmatism curves and distortion curves of the optical imaging lens of embodiment 5 are respectively shown;

[0031] Figure 26 A structural schematic diagram of an optical imaging lens according to embodiment 6 of the present application is shown;

[0032] Figures 27 to 30 On-axis chromatic aberration curves, lateral chromatic aberration curves, astigmatism curves and distortion curves of the optical imaging lens of embodiment 6 are respectively shown;

[0033] Figure 31 A structural schematic diagram of an optical imaging lens according to embodiment 7 of the present application is shown; and

[0034] Figures 32 to 35 On-axis chromatic aberration curves, lateral chromatic aberration curves, astigmatism curves and distortion curves of the optical imaging lens of embodiment 7 are respectively shown. DETAILED DESCRIPTION

[0035] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely descriptive of exemplary embodiments of the present application and is not intended to limit the scope of the present application in any way. Throughout the specification, like reference numerals refer to like elements. The expression “and / or” includes any and all combinations of one or more of the associated listed items.

[0036] It should be noted that the terms first, second, third, etc. in the present specification are used only to distinguish one feature from another, and do not denote any limitation on the features. Thus, the first lens discussed below can also be referred to as a second lens or a third lens without departing from the teachings of the present application.

[0037] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0038] In the present specification, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. In the present specification, the surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image side surface of the lens.

[0039] It should also be understood that the words "comprise", "comprising", "include", "including", and / or "contain", when used in this specification, specify the presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. Furthermore, when describing the embodiments of the present application, the use of "may" means that one or more embodiments of the present application. Also, the word "exemplary" is intended to mean an example or an illustration.

[0040] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that the terms should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0041] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0042] The features, principles, and other aspects of the present application are described in detail below.

[0043] The optical imaging lens according to the exemplary embodiments of the present application can include at least two lenses arranged in order from the object side to the image side along the optical axis, wherein the first lens closest to the object side and the i-th lens closest to the image side, i ≥ 2.

[0044] In the exemplary embodiments, the optical imaging lens can further include an infrared filter which can be in contact with the i-th lens closest to the image side. The two can form a composite lens having a flat side.

[0045] In the exemplary embodiments, at least one of the object side surface and the image side surface of the i-th lens closest to the image side is aspherical, and the aspherical surface can have at least one inflection point.

[0046] In the exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula -26 < fi / f / fno < 35, wherein fi is the effective focal length of the i-th lens closest to the image side, f is the effective focal length of the optical imaging lens, and fno is the aperture value of the optical imaging lens. By controlling the effective focal length of the i-th lens closest to the image side, the effective focal length of the optical imaging lens, and the aperture value of the optical imaging lens to satisfy the condition formula -26 < fi / f / fno < 35, the processability of the last lens (i.e., the i-th lens closest to the image side) can be ensured on the premise of a large aperture, and the aperture of the last lens can be limited, the system can be thin, and miniaturization can be achieved.

[0047] In the exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 0.8 < ImgH / TTL × Ni < 1.5, wherein ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, TTL is the distance from the object side surface of the first lens to the imaging surface along the optical axis, and Ni is the refractive index of the i-th lens. By controlling half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, the distance from the object side surface of the first lens to the imaging surface along the optical axis, and the refractive index of the i-th lens to satisfy the condition formula 0.8 < ImgH / TTL × Ni < 1.5, the lens size can be effectively controlled, the total optical length can be suppressed in the case of large aperture, and high performance of aberration and imaging performance can be achieved.

[0048] In exemplary embodiments, the optical imaging lens further comprises a second lens located on the image side of the first lens and adjacent to the first lens, and the optical imaging lens of the present application can satisfy the condition formula -5<(f1-f2) / (f1+f2)<3, wherein f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens. By controlling the ratio of the difference between the effective focal length of the first lens and the effective focal length of the second lens to the sum of the effective focal length of the first lens and the effective focal length of the second lens to be within the range, the sensitivity of the two lenses can be reduced, the tolerance requirement can be avoided, and the astigmatism, spherical aberration, and chromatic aberration of magnification caused by the first and second lenses can be better complementarily eliminated through cross distribution and cooperation with the entire system, thereby improving the imaging quality of the entire system and obtaining better resolution.

[0049] In exemplary embodiments, the optical imaging lens further comprises an (i-1)th lens located on the object side of the ith lens and adjacent to the ith lens, and the optical imaging lens of the present application can satisfy the condition formula -10<(R j-1 -R j ) / (R j-1 +R j )<2, wherein j=2×(i-1), R j-1 is the curvature radius of the object side of the (i-1)th lens, and R j is the curvature radius of the image side of the (i-1)th lens. By controlling the ratio of the difference between the curvature radius of the object side of the (i-1)th lens and the curvature radius of the image side of the (i-1)th lens to the sum of the curvature radius of the object side of the (i-1)th lens and the curvature radius of the image side of the (i-1)th lens to be within the range, on the one hand, the distortion and the field curvature of the entire system can be better balanced, and on the other hand, the (i-1)th lens is not easy to deform during assembly, which is very helpful for the stability of the field curvature.

[0050] In exemplary embodiments, the optical imaging lens further comprises an (i-1)th lens located on the object side of the ith lens and adjacent to the ith lens, and the optical imaging lens of the present application can satisfy the condition formula -1<(R2 / R1)-(R j / R j-1 )<10, wherein j=2×(i-1), wherein R2 is the curvature radius of the image side of the first lens, R1 is the curvature radius of the object side of the first lens, R j is the curvature radius of the image side of the (i-1)th lens, and R j-1 is the curvature radius of the object side of the (i-1)th lens. By controlling the curvature radius of the image side of the first lens, the curvature radius of the object side of the first lens, the curvature radius of the image side of the (i-1)th lens, and the curvature radius of the object side of the (i-1)th lens to satisfy the condition formula -1<(R2 / R1)-(R j / R j-1<10, can circumvent the lens appearance problem, ensure that two lenses maintain process stability while providing sufficient focal length, in addition, help to avoid the ghost image of each internal reflection of the two lenses, avoid the ghost image too strong to affect the actual imaging quality.

[0051] In an example embodiment, the optical imaging lens of the present application can satisfy the condition formula 0.5 <∑CT / ImgH<1.2, wherein ∑CT is the sum of the center thickness of each lens from the first lens to the i-th lens on the optical axis, and ImgH is half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. By controlling the ratio of the sum of the center thickness of each lens from the first lens to the i-th lens on the optical axis to half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens within this range, miniaturization can be achieved while ensuring a larger photosensitive element. The larger the photosensitive element, the more photons it can capture, the better the photosensitive performance, the better the imaging effect, and the finer the picture. At the same time, a small and light lens can also improve the user experience.

[0052] In an example embodiment, the optical imaging lens of the present application can satisfy the condition formula 1 <CT1 / CTi<8, wherein CT1 is the center thickness of the first lens on the optical axis, and CTi is the center thickness of the i-th lens on the optical axis. By controlling the ratio of the center thickness of the first lens on the optical axis to the center thickness of the i-th lens on the optical axis within this range, the problems of large eccentricity, tilt, etc. caused by molding of the first lens and the i-th lens can be reduced, the imaging quality is ensured while the lens height is shortened, and better shooting effect is achieved.

[0053] In an example embodiment, the optical imaging lens further comprises an i-1th lens located on the object side of the i-th lens and adjacent to the i-th lens, and the optical imaging lens of the present application can satisfy the condition formula 0.9 <Tb / CTi<11, wherein Tb is the distance along the optical axis from the image side of the i-1th lens to the object side of the i-th lens, and CTi is the center thickness of the i-th lens on the optical axis. By controlling the ratio of the distance along the optical axis from the image side of the i-1th lens to the object side of the i-th lens to the center thickness of the i-th lens on the optical axis within this range, the module end assembly problem can be avoided, the stray light at the module end is optimized, and the imaging quality is ensured.

[0054] In an example embodiment, the optical imaging lens of the present application can satisfy the condition formula 0.6mm<CTmax<1.1mm, wherein CTmax is the maximum value of the center thickness of each lens from the first lens to the i-th lens on the optical axis. By controlling the maximum value of the center thickness of each lens from the first lens to the i-th lens on the optical axis within this range, the process of each lens can be ensured, and better diopter can be obtained, thereby improving the imaging quality of the entire system and obtaining better resolving power.

[0055] In the exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 0.5 < CTmax / ETmax < 3, wherein CTmax is the maximum value of the center thickness of each lens of the first lens to the i-th lens on the optical axis, and ETmax is the maximum value of the edge thickness of each lens of the first lens to the i-th lens. By controlling the ratio of the maximum value of the center thickness of each lens of the first lens to the i-th lens on the optical axis to the maximum value of the edge thickness of each lens of the first lens to the i-th lens in the range, on the one hand, the machining and assembly process of the lens can be ensured, and problems such as too thin, too thick, and too small neck of the lens can be avoided, which can avoid actual debugging difficulties, lens deformation, and affect the quality of the lens. On the other hand, the thickness distribution of the lens can be more uniform, which is beneficial to meet the reliability requirements.

[0056] In the exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula V 40 ≥ 1, wherein V 40 is the number of lenses with an Abbe number less than 40 in the optical imaging lens. By ensuring that the number of lenses with an Abbe number less than 40 in the lens has a certain number, the lenses with a high Abbe number are matched to reduce chromatic aberration, and the high refractive index of the low Abbe number lenses can improve the imaging quality.

[0057] In the exemplary embodiments, the shape of the i-th lens closest to the image side in the optical imaging lens of the present application can be the required shape of the design formed by stamping after the i-th lens is pasted on the infrared filter. The material of the i-th lens can be selected from, for example, glue and similar materials, and the IR sheet is used as the substrate. The nano-imprinting process is a relatively optimal solution in terms of cost, processing difficulty, and process stability. The molding, cutting, and assembly are more stable, the eccentricity, inclination, and vector parameters are easier to guarantee, and the subsequent yield rate can be improved.

[0058] In the exemplary embodiments, the material of the i-th lens closest to the image side in the optical imaging lens of the present application can be a stress deformable material. The material of the i-th lens can be plastic, glue, etc. The i-th lens can be an aspherical lens, and the i-th lens and the infrared filter can form a composite lens. In terms of cost, processing difficulty, and process stability, glue can be selected as the material for forming the i-th lens. The shrinkage pressure during the manufacturing process is small, and the filter can be prevented from being broken due to the shrinkage pressure.

[0059] In the exemplary embodiments, the material of the infrared filter included in the optical imaging lens of the present application can be glass. Generally, the material of the infrared filter can be glass or plastic. In the exemplary embodiments, the material of the i-th lens closest to the image side can be glue, which is further glued with the infrared filter to form a composite lens. In the case of thermal shock, the shrinkage stress of the glue imprinted on the filter can easily cause the filter to break. The infrared filter made of glass material in combination with the appropriate selection of glue material can reduce the stress, enhance the transmittance after imprinting, and ensure better imaging quality.

[0060] In the exemplary embodiments, the optical imaging lens of the present application can include at least one diaphragm. The diaphragm can restrict the light path and control the light intensity. The diaphragm can be arranged at an appropriate position of the optical imaging lens, for example, the diaphragm can be located between the object side and the first lens.

[0061] In the exemplary embodiments, the optical imaging lens described above can further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0062] The optical imaging lens according to the above embodiments of the present application can include at least two optical lenses and an infrared filter, wherein the infrared filter is in contact with the i-th lens closest to the image side, and at least one of the object side and the image side of the i-th lens closest to the image side is aspherical and has at least one inflection point; at the same time, the effective focal length fi of the i-th lens, the effective focal length f of the optical imaging lens, and the aperture value fno of the optical imaging lens satisfy the condition formula -26 < fi / f / fno < 35. Through such arrangement of the optical imaging lens, the process of the lens closest to the image side can be ensured on the premise of large aperture, the aperture of the lens closest to the image side can be limited, the system can be thin, and miniaturization can be achieved.

[0063] In the embodiments of the present application, at least one aspherical mirror surface can be included in the mirror surfaces of the at least two lenses included in the optical imaging lens. The aspherical lens has better curvature radius characteristics, has the advantages of improving distortion aberration and improving astigmatism aberration. After the aspherical lens is adopted, the aberration occurring during imaging can be eliminated as much as possible, and the imaging quality can be improved.

[0064] However, those skilled in the art should understand that the number of lenses constituting the optical imaging lens can be reasonably determined without departing from the technical solutions claimed by the present application to obtain the various results and advantages described in the present specification, which are not specifically limited by the present application.

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

[0066] Example 1

[0067] The following description refers to Figures 1 to 5 An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 A structural schematic diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0068] As Figure 1 shown, the optical imaging lens comprises, in order from the object side to the image side along the optical axis, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8.

[0069] In this embodiment, the first lens E1 has positive refractive power, the object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative refractive power, the object side surface S3 is convex, and the image side surface S4 is concave. The third lens E3 has negative refractive power, the object side surface S5 is convex, and the image side surface S6 is concave. The fourth lens E4 has positive refractive power, the object side surface S7 is convex, and the image side surface S8 is convex. The fifth lens E5 has negative refractive power, the object side surface S9 is concave, and the image side surface S10 is concave. The sixth lens E6 has positive refractive power, the object side surface S11 is convex, and the image side surface S12 is concave. The seventh lens E7 has positive refractive power, the object side surface S13 is convex, and the image side surface S14 is concave. The eighth lens E8 has negative refractive power, the object side surface S15 is concave, and the image side surface S16 is a plane. On the image side of the eighth lens E8, the optical imaging lens further comprises an infrared filter which is attached to the eighth lens E8, the object side surface S16 and the image side surface S17 of the infrared filter are both planes, and the infrared filter and the eighth lens E8 form a composite lens. The optical imaging lens also has an imaging surface S18, and light from an object can sequentially pass through the surfaces S1 to S17 and finally form an image on the imaging surface S18.

[0070] Table 1 shows the basic parameters of the optical imaging lens of Embodiment 1, wherein the units of the radius of curvature, the thickness / distance, and the effective radius are all millimeters (mm).

[0071]

[0072]

[0073] Table 1

[0074] In Embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 and the object side surface of the eighth lens E8 are all aspheric surfaces, and the surface type x of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:

[0075]

[0076] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order coefficients A4, A6, A8, A1, A2, A3, A4, A5, A6, A8, A1 ... 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0077] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.0961E-02 9.6345E-04 -1.1928E-03 -5.4125E-04 -3.0994E-04 -4.9751E-05 -4.3170E-05 S2 -2.4391E-02 1.3073E-02 -3.7812E-03 9.4853E-04 -1.8564E-04 -4.6743E-06 -2.4957E-05 S3 -2.5127E-02 2.6280E-02 -1.2896E-03 2.2022E-03 4.1237E-05 7.9055E-05 -1.9275E-05 S4 -9.1565E-03 8.3949E-03 5.0763E-05 1.0006E-03 2.6336E-04 1.3498E-04 5.0001E-05 S5 -2.3161E-01 -5.1821E-03 2.2780E-03 1.2723E-03 2.6617E-04 4.8816E-05 -1.3759E-05 S6 -2.4450E-01 2.5871E-02 8.7419E-03 2.9680E-03 1.3934E-03 9.9537E-05 -2.5728E-04 S7 -1.3294E-01 6.4386E-03 -2.2793E-03 2.6960E-03 3.2774E-03 9.8158E-04 -1.0776E-04 S8 -2.0633E-01 -2.2678E-02 -5.1379E-03 2.2298E-03 3.2032E-03 2.0695E-03 9.5145E-04 S9 -2.8123E-01 -3.7744E-02 -1.7071E-03 6.6142E-03 -2.6241E-03 3.9454E-04 3.0093E-04 S10 -1.0477E+00 3.1135E-01 -5.9099E-02 2.6504E-02 -2.3716E-02 7.2017E-03 -1.8585E-04 S11 -1.3455E+00 1.8893E-02 8.2436E-02 3.1628E-02 -1.6226E-02 -2.5185E-03 -3.4667E-03 S12 -8.6121E-01 -2.1536E-01 1.4801E-01 -5.5979E-02 6.3550E-03 1.0774E-04 4.1121E-03 S13 -1.7968E+00 6.1269E-01 -1.5097E-01 -1.3777E-03 1.5494E-02 3.5255E-03 -1.0847E-02 S14 -4.9254E+00 1.0366E+00 -2.7023E-01 9.4912E-02 -3.8439E-02 1.6848E-02 -1.0599E-02 S15 7.2558E-01 -2.7883E-02 -8.9938E-02 8.6362E-02 -5.2276E-02 2.7482E-02 -1.3494E-02

[0078] Table 2-1

[0079]

[0080]

[0081] Table 2-2

[0082] Figure 2 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 3 The magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. Figure 4 The astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 5 The distortion curve of the optical imaging lens of Embodiment 1 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 2 to 5 It can be seen that the optical imaging lens given in Example 1 can achieve good imaging quality.

[0083] Example 2

[0084] The following is for reference Figures 6 to 10 This paper describes an optical imaging lens according to Embodiment 2 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments. Figure 6 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown.

[0085] like Figure 6As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8.

[0086] In this embodiment, the first lens E1 has positive refractive power, the object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative refractive power, the object side surface S3 is convex, and the image side surface S4 is concave. The third lens E3 has negative refractive power, the object side surface S5 is convex, and the image side surface S6 is concave. The fourth lens E4 has positive refractive power, the object side surface S7 is convex, and the image side surface S8 is convex. The fifth lens E5 has negative refractive power, the object side surface S9 is convex, and the image side surface S10 is concave. The sixth lens E6 has positive refractive power, the object side surface S11 is convex, and the image side surface S12 is concave. The seventh lens E7 has negative refractive power, the object side surface S13 is convex, and the image side surface S14 is concave. The eighth lens E8 has positive refractive power, the object side surface S15 is convex, and the image side surface S16 is a plane. On the image side of the eighth lens E8, the optical imaging lens further includes an infrared filter that is attached to the eighth lens E8, the object side surface S16 and the image side surface S17 of the infrared filter are both planes, and the infrared filter and the eighth lens E8 form a composite lens. The optical imaging lens also has an imaging surface S18, and light from an object can sequentially pass through the surfaces S1 to S17 and finally form an image on the imaging surface S18.

[0087] Table 3 shows the basic parameters of the optical imaging lens of embodiment 2, where the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm). Tables 4-1 and 4-2 show the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30, A32, A34, A36, A38, A40, A42, A44, A46, A48, A50, A52, A54, A56, A58, A60, A62, A64, A66, A68, A70, A72, A74, A76, A78, A80, A82, A84, A86, A88, A90, A92, A94, A96, A98, and A100 of the aspherical surfaces S1 to S15 that can be used in embodiment 2, where each aspherical surface is defined by the formula (1) given in embodiment 1 above. 10 12 14 16 18 20 22 24 26 28 30 where each aspherical surface is defined by the formula (1) given in embodiment 1 above.

[0088]

[0089]

[0090] Table 3

[0091] Face number A4 A6 A8 A10 A12 A14 A16 S1 -8.9069E-03 -5.9917E-03 -2.5922E-03 -8.7066E-04 -2.0186E-04 -4.7937E-05 1.9928E-07 S2 -7.3726E-02 1.2748E-02 -4.6453E-03 1.0092E-03 -1.8955E-04 -1.1085E-04 9.0968E-06 S3 -4.7215E-02 3.2565E-02 -2.3465E-03 2.4521E-03 -1.0886E-04 5.1205E-05 -2.0323E-05 S4 1.7223E-03 1.4024E-02 2.1136E-04 1.4946E-03 4.6731E-04 2.7205E-04 1.2134E-04 S5 -2.1848E-01 -1.0396E-02 6.3233E-04 1.5817E-03 6.2946E-04 2.3848E-04 8.9671E-05 S6 -2.8115E-01 1.0544E-02 1.0537E-02 2.9901E-03 8.4157E-04 -2.3137E-05 -3.3170E-05 S7 -8.7996E-02 2.4516E-02 5.2007E-03 -5.4905E-04 1.0660E-03 -7.9065E-05 -8.4524E-05 S8 -2.4941E-01 1.3414E-02 3.1321E-03 1.7088E-03 2.9483E-03 1.5775E-03 2.9563E-04 S9 -6.8868E-01 -3.1928E-02 -5.9566E-03 1.2280E-02 2.1382E-03 5.0859E-03 5.9917E-05 S10 -1.9726E+00 3.8633E-01 -7.3314E-02 3.2180E-02 -1.9309E-02 8.7267E-03 -2.8895E-03 S11 -2.8639E+00 2.6223E-01 3.8671E-02 2.5243E-02 -1.8990E-02 4.7278E-03 1.0087E-05 S12 -8.5554E-01 -2.3439E-01 1.6747E-01 -6.8378E-02 2.7066E-02 -8.0139E-03 3.3644E-03 S13 -2.4375E+00 1.0966E+00 -4.6767E-01 1.8880E-01 -6.2548E-02 1.0837E-02 8.2072E-04 S14 -6.2197E+00 1.4190E+00 -4.1660E-01 1.7153E-01 -6.7008E-02 3.2668E-02 -1.9556E-02 S15 1.6338E-01 8.1573E-03 -1.3211E-02 -1.8379E-03 -6.7442E-03 -1.1408E-03 1.1201E-03

[0092] ​​​​​​​​​​Table 4-1

[0093]

[0094]

[0095] Table 4-2

[0096] Figure 7 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of light rays of different wavelengths after passing through the lens. Figure 8 The magnification chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of light rays on the imaging plane after passing through the lens. Figure 9 The astigmatism curve of the optical imaging lens of Embodiment 2 is shown, which represents the meridional image curvature and sagittal image curvature. Figure 10 The distortion curve of the optical imaging lens of Embodiment 2 is shown, which represents the distortion size value corresponding to different image heights. According to Figures 7 to 10 It can be seen that the optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0097] Example 3

[0098] The following refers to Figures 11 to 15 An optical imaging lens according to Embodiment 3 of the present application is described. Figure 11 The structural schematic diagram of the optical imaging lens according to Embodiment 3 of the present application is shown.

[0099] As Figure 11 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8.

[0100] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has positive optical power, with its object-side surface S15 being convex and its image-side surface S16 being planar. On the image side of the eighth lens E8, the optical imaging lens also includes an infrared filter that is attached to the eighth lens E8. The object side S16 and the image side S17 of the infrared filter are both flat, and the infrared filter and the eighth lens E8 form a compound lens. The optical imaging lens also has an imaging surface S18, on which light from the object can pass sequentially through the surfaces S1 to S17 and finally be imaged onto the imaging surface S18.

[0101] Table 5 shows the basic parameters of the optical imaging lens of Example 3, where the units for radius of curvature, thickness / distance, and effective radius are millimeters (mm). Tables 6-1 and 6-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S15 in Example 3. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0102]

[0103]

[0104] Table 5

[0105] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.0317E-02 -8.0953E-03 -2.4137E-03 -4.8220E-04 -6.2394E-05 7.0474E-06 -2.0516E-06 S2 -7.0783E-02 7.2906E-03 -2.4900E-03 5.7995E-04 -7.6451E-05 -3.0763E-06 -9.9830E-06 S3 -3.2850E-02 2.0802E-02 -9.7515E-04 1.2071E-03 -6.7775E-05 -1.5800E-05 -1.1028E-05 S4 1.7511E-03 6.3611E-03 -4.0639E-04 4.2932E-04 4.9058E-05 1.7249E-05 6.7984E-06 S5 -1.4773E-01 -8.0840E-03 -1.0880E-03 6.6864E-04 2.4204E-04 8.5999E-05 1.6577E-05 S6 -2.0075E-01 1.5915E-02 4.5747E-03 2.3321E-03 6.1674E-04 -1.0331E-04 -3.4143E-05 S7 -1.3790E-01 5.8038E-02 4.6653E-03 -3.0799E-03 -1.4373E-03 -1.0358E-03 1.4102E-04 S8 -2.0007E-01 5.5477E-02 3.1265E-02 8.3806E-05 -3.4949E-03 -4.8588E-03 -2.7108E-03 S9 -1.6275E-01 -2.8348E-01 5.7017E-02 3.3508E-02 2.1661E-02 1.4349E-03 -2.5791E-03 S10 -1.1732E+00 1.6837E-01 -7.1322E-03 3.6007E-02 -3.4512E-02 1.0104E-02 -4.7337E-04 S11 -5.0303E+00 1.0860E+00 -1.6343E-01 -3.7895E-02 1.8511E-02 1.9474E-02 -2.2006E-02 S12 -2.5782E+00 2.3030E-01 1.1867E-01 -1.1518E-01 4.8444E-02 -2.4696E-03 9.9533E-03 S13 -2.0573E+00 8.7895E-01 -3.7566E-01 1.6128E-01 -7.6786E-02 5.2305E-02 -2.8709E-02 S14 -6.6602E+00 1.5304E+00 -4.5002E-01 1.8714E-01 -9.0155E-02 3.3420E-02 -1.1676E-02 S15 1.5720E-01 5.6822E-01 -6.6231E-02 8.6890E-02 -1.1368E-01 -4.9504E-02 -1.5127E-01

[0106] Table 6-1

[0107] Face number A18 A20 A22 A24 A26 A28 A30 S1 2.2905E-06 -2.9962E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -4.6571E-06 9.6795E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -3.1654E-06 -7.9549E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -5.0366E-07 -4.1529E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -5.8724E-06 2.6174E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -4.6050E-05 2.5109E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -6.0024E-05 -9.1351E-05 -8.0614E-05 2.3139E-05 7.6819E-06 -6.8809E-06 1.0133E-06 S8 -8.3469E-04 1.9251E-04 3.8389E-04 3.0906E-04 1.6918E-04 6.8550E-05 9.1250E-06 S9 -4.0912E-03 -1.6885E-03 -3.2215E-04 4.1724E-04 3.8118E-04 1.6127E-04 5.5623E-05 S10 -1.8753E-03 -2.0883E-03 -1.5227E-03 -4.5356E-04 -5.6976E-04 -1.7205E-04 -8.8626E-05 S11 4.5878E-03 4.1168E-03 -2.8344E-03 -6.2927E-04 7.5211E-04 -1.6050E-05 -1.7677E-04 S12 -1.6392E-02 3.8275E-03 3.3304E-04 1.6264E-03 -2.6860E-03 1.0445E-04 -1.0818E-04 S13 -2.5461E-03 1.3756E-02 -6.6259E-03 -3.1366E-03 3.6844E-03 5.1266E-04 -9.4724E-04 S14 1.6248E-02 -1.7183E-03 2.1199E-03 2.1060E-03 2.0081E-03 3.3225E-04 3.5351E-04 S15 -1.9859E-02 2.0348E-02 9.4316E-02 6.1456E-02 4.9371E-02 1.2804E-02 6.1595E-03

[0108] Table 6-2

[0109] Figure 12The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 13 The magnification chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. Figure 14 The astigmatism curve of the optical imaging lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 15 The distortion curve of the optical imaging lens of Embodiment 3 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 12 to 15 It can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality.

[0110] Example 4

[0111] The following is for reference Figures 16 to 20 Describes an optical imaging lens according to Embodiment 4 of this application. Figure 16 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown.

[0112] like Figure 16 As shown, the optical imaging lens includes, in sequence from the object side to the image side along the optical axis: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, and eighth lens E8.

[0113] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. 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 convex 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 sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being planar. On the image side of the eighth lens E8, the optical imaging lens also includes an infrared filter that is attached to the eighth lens E8. The object side S16 and the image side S17 of the infrared filter are both flat, and the infrared filter and the eighth lens E8 form a compound lens. The optical imaging lens also has an imaging surface S18, on which light from the object can pass sequentially through the surfaces S1 to S17 and finally be imaged onto the imaging surface S18.

[0114] Table 7 shows the basic parameters of the optical imaging lens of Example 4, where the units for radius of curvature, thickness / distance, and effective radius are millimeters (mm). Tables 8-1 and 8-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S15 in Example 4. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0115]

[0116] Table 7

[0117] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.0842E-02 9.7769E-04 -2.4020E-04 -1.5377E-05 -5.6385E-05 1.4458E-05 -1.4765E-05 S2 2.6387E-02 -3.8041E-03 -6.7891E-04 -6.7104E-05 -6.2244E-05 1.5227E-05 5.3317E-06 S3 -6.2977E-02 5.9214E-03 -1.2354E-03 2.7314E-04 -1.1780E-04 3.9443E-05 -7.2455E-06 S4 -5.3285E-02 1.3733E-02 5.0075E-04 4.9295E-04 -3.4051E-05 -5.0883E-06 -1.5214E-05 S5 2.1877E-02 2.6845E-03 9.7197E-04 2.0149E-04 -2.9301E-05 -3.6091E-05 -1.8555E-05 S6 1.4392E-02 2.1524E-03 2.6716E-03 5.7716E-04 1.6009E-04 -1.1891E-04 -1.6657E-05 S7 -1.4353E-01 -7.7852E-03 1.4717E-03 7.0473E-04 4.4248E-04 -2.6433E-04 5.8592E-06 S8 -3.0835E-01 3.7758E-02 5.7958E-04 4.7105E-04 -3.2293E-05 -1.0273E-03 3.4549E-04 S9 -6.9607E-01 8.2110E-02 2.9534E-03 -9.5825E-04 -1.4603E-04 -8.8858E-04 5.2901E-04 S10 -3.2485E-01 1.4950E-02 1.1194E-02 -5.7595E-03 4.7490E-04 2.9177E-04 -1.1293E-04 S11 1.0477E+00 -1.0396E-01 1.0648E-02 -4.9283E-03 1.5117E-03 -4.0298E-04 1.0071E-04 S12 3.9254E-01 5.9979E-02 -3.4866E-02 1.1760E-03 1.3324E-03 -1.2422E-03 7.4138E-04 S13 -2.3846E+00 3.4812E-01 8.6401E-03 -9.6317E-03 -9.7899E-03 6.1323E-03 -1.1140E-03 S14 -1.6186E+00 -6.0827E-02 -1.5894E-02 1.0738E-02 5.4015E-04 6.4746E-03 8.6374E-04 S15 2.8460E+00 -3.1364E-01 -1.1741E-01 7.2950E-02 -5.6165E-02 2.1393E-02 -1.5481E-03

[0118] Table 8-1

[0119] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.0085E-05 -4.9675E-06 4.9706E-06 -5.4046E-06 1.7404E-06 -2.4024E-06 1.6101E-06 S2 -1.0540E-06 -1.2571E-06 -1.7533E-06 7.7016E-07 -7.1655E-07 1.2082E-06 -3.9869E-07 S3 1.2801E-05 1.8536E-07 -5.0178E-08 -8.3397E-06 -4.2682E-06 -2.4737E-06 2.4480E-06 S4 -1.7126E-06 1.1358E-05 6.9629E-06 2.7526E-06 -1.8843E-06 8.7417E-07 2.9589E-07 S5 4.8600E-06 -2.8125E-06 3.0978E-06 -3.7512E-06 -5.5161E-07 -3.7460E-06 2.1461E-06 S6 -3.3115E-05 8.2559E-06 -4.5643E-07 3.5494E-06 3.0814E-07 3.5393E-06 3.1197E-06 S7 -7.0415E-05 -2.3064E-05 -9.8107E-06 6.2215E-06 -6.2321E-07 3.8464E-06 6.6256E-07 S8 -7.5421E-05 4.7178E-05 -9.7206E-06 2.8038E-05 -1.6172E-05 1.3080E-05 -1.1149E-05 S9 2.4903E-05 -1.6051E-05 1.3849E-05 1.9366E-05 -2.3166E-05 8.8767E-06 -1.1716E-05 S10 7.0559E-06 -9.0924E-06 9.5165E-05 3.5442E-05 -1.7857E-05 -3.3245E-06 -1.3309E-05 S11 -9.5447E-05 9.6619E-05 -3.2282E-05 5.8997E-05 -5.4714E-05 5.0735E-06 4.4588E-06 S12 2.0837E-04 -3.8444E-04 -1.7047E-05 2.0833E-04 -4.7078E-05 -6.1383E-05 2.6227E-05 S13 -1.7336E-04 -2.1723E-04 2.4522E-04 -1.2542E-05 -7.3854E-05 9.6012E-06 1.4851E-05 S14 -1.2423E-03 -1.1933E-03 1.7567E-04 -9.7749E-05 2.4613E-05 1.6183E-04 -5.8038E-05 S15 -5.7810E-04 -4.8086E-04 1.8744E-03 -2.2661E-03 3.3946E-04 7.7024E-04 -1.8232E-04

[0120] Table 8-2

[0121] Figure 17 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 18 The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. Figure 19 The astigmatism curve of the optical imaging lens of Embodiment 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 20 The distortion curve of the optical imaging lens of Example 4 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 17 to 20 It can be seen that the optical imaging lens given in Example 4 can achieve good imaging quality.

[0122] Example 5

[0123] The following is for reference Figures 21 to 25 Describes an optical imaging lens according to Embodiment 5 of this application. Figure 21 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown.

[0124] like Figure 21As shown, the optical imaging lens includes, in sequence from the object side to the image side along the optical axis: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and seventh lens E7.

[0125] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. 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 convex 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 convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being planar. On the image side of the seventh lens E7, the optical imaging lens also includes an infrared filter that is attached to the seventh lens E7. The object side S14 and the image side S15 of the infrared filter are both flat, and the infrared filter and the seventh lens E7 form a compound lens. The optical imaging lens also has an imaging surface S16, on which light from the object can pass sequentially through each surface S1 to S15 and finally be imaged onto the imaging surface S16.

[0126] Table 9 shows the basic parameters of the optical imaging lens of Example 5, where the units for radius of curvature, thickness / distance, and effective radius are millimeters (mm). Tables 10-1 and 10-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S13 in Example 5. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0127]

[0128] Table 9

[0129]

[0130]

[0131] Table 10-1

[0132] Face number A18 A20 A22 A24 A26 A28 A30 S1 2.2464E-06 -4.9035E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 6.0554E-07 1.5419E-06 -4.2299E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 4.6814E-07 -6.6989E-07 5.6993E-07 -1.0136E-07 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.0236E-06 -1.1467E-06 -2.0969E-06 -4.1053E-07 2.1106E-07 1.0308E-06 3.4141E-07 S5 9.9406E-06 -1.6422E-06 -9.5077E-07 -1.7006E-06 0.0000E+00 0.0000E+00 0.0000E+00 S6 6.6864E-05 1.3726E-05 5.2093E-06 -1.5613E-06 -1.7730E-08 3.3896E-07 1.8040E-06 S7 1.6407E-04 -5.0332E-05 -1.8140E-05 4.6457E-07 9.7778E-06 -5.7953E-06 2.1823E-06 S8 1.8209E-04 -2.3581E-04 -4.9804E-05 2.6871E-05 2.4147E-05 -1.2994E-05 1.7137E-06 S9 3.9140E-04 1.3247E-04 -6.5682E-05 -6.7453E-06 5.0642E-06 -4.9833E-07 -1.8920E-09 S10 1.9687E-05 -2.6741E-04 -1.0769E-04 6.5550E-05 -2.3114E-06 -1.5113E-06 0.0000E+00 S11 2.9679E-03 -1.5231E-03 4.2832E-04 -4.4327E-05 -3.7839E-06 8.6060E-07 -4.7058E-09 S12 6.5306E-03 -3.3440E-03 1.4855E-03 -4.8117E-04 1.0087E-04 -1.0072E-05 6.0925E-08 S13 1.6486E-02 -1.0186E-02 5.8402E-03 -3.1272E-03 1.2594E-03 -2.8603E-04 2.6202E-05

[0133] Table 10-2

[0134] Figure 22 The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the convergence of light rays of different wavelengths after passing through the lens. Figure 23 The relative aperture chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of light rays on the imaging plane after passing through the lens. Figure 24 The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and sagittal image curvature. Figure 25 The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion size value corresponding to different image heights. According to Figures 22 to 25 It can be seen that the optical imaging lens of Example 5 can achieve good imaging quality.

[0135] Example 6

[0136] The optical imaging lens according to Example 6 of the present application is described below with reference to Figures 26 to 30 The structure of the optical imaging lens according to Example 6 of the present application is shown. Figure 26 The structure of the optical imaging lens according to Example 6 of the present application is shown.

[0137] As shown in Figure 26 the optical imaging lens sequentially includes, along the optical axis from the object side to the image side, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6.

[0138] In this embodiment, the first lens E1 has positive refractive power, the object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative refractive power, the object side surface S3 is convex, and the image side surface S4 is concave. The third lens E3 has positive refractive power, the object side surface S5 is convex, and the image side surface S6 is convex. The fourth lens E4 has positive refractive power, the object side surface S7 is concave, and the image side surface S8 is convex. The fifth lens E5 has negative refractive power, the object side surface S9 is concave, and the image side surface S10 is concave. The sixth lens E6 has negative refractive power, the object side surface S12 is a plane, and the image side surface S13 is concave. On the object side of the sixth lens E6, the optical imaging lens further includes an infrared filter in contact with the sixth lens E6, the infrared filter has an object side surface S11 and an image side surface S12, both of which are planes. The image side surface S12 of the infrared filter is in contact with the object side surface S12 of the sixth lens E6, and the two constitute a composite lens. The optical imaging lens also has an imaging surface S14, and light from an object can sequentially pass through the surfaces S1 to S13 and finally be imaged on the imaging surface S14.

[0139] Table 11 shows the basic parameters of the optical imaging lens of Example 6, where the units for radius of curvature, thickness / distance, and effective radius are millimeters (mm). Tables 12-1 and 12-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S10 and S13 in Example 6. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0140]

[0141] Table 11

[0142] Face number A4 A6 A8 A10 A12 A14 A16 S1 -4.6362E-03 -3.4838E-03 -1.8539E-03 -5.4975E-04 -2.1463E-04 -3.0147E-05 -2.4396E-05 S2 -7.0908E-02 5.6546E-03 -3.9960E-03 1.4769E-04 -8.1260E-05 -1.4497E-05 8.8740E-06 S3 -4.7295E-02 1.7520E-02 -3.1951E-03 6.3561E-04 -7.2201E-05 -2.3107E-05 2.1456E-06 S4 1.2641E-02 1.2062E-02 2.3136E-04 5.0194E-04 8.5392E-05 2.4416E-06 -2.8629E-06 S5 -1.3417E-01 9.3637E-04 2.9160E-03 1.9375E-03 6.2368E-04 2.0736E-04 -3.3571E-06 S6 -2.4855E-01 8.2642E-03 1.1583E-02 4.6883E-03 1.5131E-03 2.5882E-04 -4.3031E-05 S7 -4.0948E-01 -1.7647E-02 3.0570E-02 2.5924E-03 -2.9536E-03 -1.0545E-04 7.6275E-04 S8 3.7997E-01 8.1330E-03 1.8190E-02 -2.5629E-02 1.7094E-03 5.3401E-03 -2.1793E-04 S9 -5.4015E-01 3.7238E-01 -1.3581E-01 2.8023E-02 1.9231E-03 -1.9060E-03 -9.8272E-04 S10 -2.6556E+00 4.7010E-01 -1.2675E-01 5.6707E-02 -2.0064E-02 8.5859E-03 -5.3147E-03 S13 -2.4744E-01 1.7362E-02 8.2705E-04 -2.0117E-02 1.0936E-02 -1.0141E-02 8.1295E-03

[0143] Table 12-1

[0144] Face number A18 A20 A22 A24 A26 A28 A30 S1 7.5753E-06 -6.0239E-06 5.9283E-06 -4.6188E-06 2.7543E-06 -5.8209E-07 9.9415E-07 S2 6.3874E-06 9.7875E-06 9.3440E-07 2.6733E-07 -5.1843E-08 0.0000E+00 0.0000E+00 S3 5.8305E-06 2.3884E-06 4.6339E-06 -1.5384E-07 3.1790E-06 0.0000E+00 0.0000E+00 S4 -5.1625E-06 5.6971E-08 2.9917E-07 4.9024E-07 1.8173E-07 4.5065E-06 2.0242E-06 S5 1.5339E-06 -2.9898E-05 -2.5305E-06 -1.2436E-05 1.2103E-06 -5.0753E-06 3.6446E-06 S6 -1.2303E-04 -8.5064E-05 -6.6100E-05 -2.9237E-05 -1.7938E-05 -3.2944E-06 -4.5216E-06 S7 -2.5724E-04 -4.7105E-04 -2.7694E-04 -3.1189E-05 2.6302E-05 2.6844E-05 8.6882E-06 S8 -2.1982E-03 1.4419E-04 3.6093E-04 3.5696E-05 -1.1304E-04 4.9866E-05 5.2574E-05 S9 1.6047E-03 -1.0182E-03 2.0102E-04 2.8978E-04 -2.7613E-04 1.4015E-04 -2.6610E-05 S10 3.1495E-03 -1.2977E-03 4.4269E-04 -5.3062E-05 3.0760E-05 -3.5970E-05 -1.0973E-06 S13 -5.6621E-03 1.1380E-03 1.8933E-04 -8.8530E-05 -5.5554E-04 1.1641E-03 -5.7381E-04

[0145] Table 12-2

[0146] Figure 27 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 28 The magnification chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. Figure 29 The astigmatism curve of the optical imaging lens of Embodiment 6 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 30 The distortion curve of the optical imaging lens of Example 6 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 27 to 30 It can be seen that the optical imaging lens given in Example 6 can achieve good imaging quality.

[0147] Example 7

[0148] The following is for reference Figures 31 to 35 Describes an optical imaging lens according to Embodiment 7 of this application. Figure 31 A schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of this application is shown.

[0149] like Figure 31As shown, the optical imaging lens includes, in sequence from the object side to the image side along the optical axis: first lens E1, aperture STO, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and sixth lens E6.

[0150] In this embodiment, 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 convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S12 being planar and its image-side surface S13 being concave. On the object side of the sixth lens E6, the optical imaging lens also includes an infrared filter that is attached to the sixth lens E6. The infrared filter has an object-side surface S11 and an image-side surface S12, both of which are planar. The image-side surface S12 of the infrared filter is attached to the object-side surface S12 of the sixth lens E6, forming a compound lens. The optical imaging lens also has an imaging surface S14, on which light from the object can pass sequentially through surfaces S1 to S13 and finally be imaged onto the imaging surface S14.

[0151] Table 13 shows the basic parameters of the optical imaging lens of Example 7, where the units for radius of curvature, thickness / distance, and effective radius are millimeters (mm). Tables 14-1 and 14-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S10 and S13 in Example 7. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0152]

[0153] Table 13

[0154]

[0155]

[0156] Table 14-1

[0157] Face number A18 A20 A22 A24 A26 A28 A30 S1 2.4842E-06 7.3853E-06 -3.3415E-06 1.1068E-06 -1.8459E-07 2.8018E-06 1.2881E-06 S2 -8.8979E-06 1.6983E-05 -6.3523E-06 6.4549E-06 -3.3902E-06 4.6319E-06 -1.3126E-06 S3 1.3132E-05 -1.0585E-06 6.8034E-07 -1.9398E-06 1.4045E-07 -1.7669E-06 6.2829E-07 S4 9.4260E-05 6.2679E-05 2.3433E-05 1.1887E-05 -1.7227E-06 -5.3694E-07 -2.7566E-06 S5 4.5828E-05 -2.3713E-05 -4.1040E-05 -3.3228E-05 -1.7316E-05 -7.1625E-06 -5.5162E-07 S6 -6.0690E-05 -4.5676E-05 -5.1238E-05 -1.9938E-05 -1.3859E-05 -1.4407E-06 -1.0058E-06 S7 -5.0395E-05 -7.9834E-06 -4.0822E-05 -1.3172E-05 -1.2476E-05 -4.2489E-06 -8.0807E-07 S8 -2.0017E-04 1.3004E-04 -6.0537E-05 5.8033E-06 -1.1839E-05 -7.7854E-06 5.7110E-06 S9 -5.8654E-04 3.4651E-04 -1.0430E-04 1.0213E-04 -3.6322E-05 -7.9134E-06 -1.0719E-05 S10 2.8326E-03 -1.4315E-03 6.0915E-04 -1.7451E-04 1.0605E-04 4.5614E-05 4.6671E-05 S13 -8.4613E-04 1.3473E-03 -1.5805E-05 -5.2754E-04 -6.4550E-04 9.7512E-04 -6.3380E-04

[0158] Table 14-2

[0159] Figure 32 The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which represents the deviation of light rays of different wavelengths after converging focus via the lens. Figure 33 The magnification chromatic aberration curve of the optical imaging lens of Example 7 is shown, which represents the deviation of light rays on the imaging surface at different image heights via the lens. Figure 34 The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 35 The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion size value corresponding to different image heights. According to Figures 32 to 35 It can be seen that the optical imaging lens given in Example 7 can achieve good imaging quality.

[0160] In addition, in Example 1 to Example 7, the effective focal length values f1 to f8 of each lens, the effective focal length f of the optical imaging lens, the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens along the optical axis, half of the diagonal line length of the effective pixel area on the imaging surface ImgH, and the maximum half field angle Semi-FOV of the optical imaging lens are shown in Table 15.

[0161] Parameter / Example 1 2 3 4 5 6 7 f1 (mm) 5.97 5.93 5.62 4.84 5.30 3.51 -7.09 f2 (mm) -16.41 -16.97 -19.02 -8.32 -12.16 -8.41 2.55 f3 (mm) -41.09 -34.04 -20.08 23.27 98.53 31.91 -11.67 f4 (mm) 23.30 16.17 12.45 -13.47 -30.93 3.01 1.74 f5 (mm) -8.14 -8.45 -8.13 9.23 6.23 -2.55 -2.24 f6 (mm) 6.59 3.96 5.03 -34.68 -5.19 -22.688 -8.84 f7 (mm) 60.12 -4.69 -7.75 11.49 -320.279 f8 (mm) -18.602 310.299 288.623 -9.17 f (mm) 5.99 5.73 5.46 5.69 6.06 3.96 2.12 TTL (mm) 7.29 7.26 7.00 7.22 7.20 5.13 4.79 ImgH (mm) 5.36 5.36 5.05 5.00 5.36 3.20 2.90 Semi-FOV (°) 41.25 42.25 42.07 40.43 41.08 38.17 56.72

[0162] Table 15

[0163] Example 1 to Example 7 respectively meet the conditions shown in Table 16.

[0164] Conditional expression / Example 1 2 3 4 5 6 7 fi / f / fno -1.81 33.64 28.25 -0.83 -25.14 -3.10 -1.84 ImgH / TTL x Ni 1.12 1.12 1.10 1.05 1.13 0.95 0.92 (f1-f2) / (f1+f2) -2.14 -2.07 -1.84 -3.78 -2.54 -2.43 2.12 (R j-1 -R j ) / (R j-1 +R j )]]> 0.02 0.68 0.35 -0.30 -9.58 1.44 0.49 (R2 / R1)-(R j / R j-1 )]]> 2.71 3.83 3.85 6.57 6.93 5.24 -0.70 ∑CT / ImgH 0.63 0.78 0.75 0.83 0.64 0.80 1.02 CT1 / CTi 4.45 1.57 2.82 3.40 2.87 6.87 1.91 Tb / CTi 10.26 0.93 1.99 4.79 1.55 6.64 4.22 CTmax (mm) 0.89 0.99 0.79 0.88 0.80 0.69 1.01 CTmax / ETmax 2.14 1.58 1.34 1.10 1.14 1.12 0.95 V 40 ]]> 3.00 3.00 3.00 4.00 2.00 1.00 2.00

[0165] Table 16

[0166] The present application also provides an imaging device provided with an electronic photosensitive element for imaging, which can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a separate imaging equipment such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0167] The above description is only the preferred embodiment of the present application and the explanation of the technical principles. It should be understood by those skilled in the art that the protective scope of the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by the combinations of the above technical features or their equivalent features without departing from the concept of the present application. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. An optical imaging lens, characterized in that, sequentially arranged from the object side to the image side along the optical axis include: a first lens with positive refractive power, an object side surface of which is convex, and an image side surface of which is concave; a second lens with negative refractive power, an object side surface of which is convex, and an image side surface of which is concave; a third lens with refractive power, an image side surface of which is concave; a fourth lens with refractive power, an object side surface of which is convex; a fifth lens with refractive power, an image side surface of which is concave; a sixth lens with refractive power; a seventh lens with refractive power, an object side surface of which is convex, and an image side surface of which is concave; an eighth lens with refractive power, an image side surface of which is a plane; and an infrared filter, wherein the eighth lens is attached to the infrared filter; an object side surface of the eighth lens is aspheric and has at least one inflection point; refractive powers of the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are arranged as negative-positive-negative-positive-positive, negative-positive-negative-positive-positive or positive-negative-positive-negative-positive; a number of lenses with refractive power in the optical imaging lens is eight; and the optical imaging lens satisfies: -1.81≤f8 / f / fno≤33.64, where f8 is an effective focal length of the eighth lens, f is an effective focal length of the optical imaging lens, and fno is an aperture value of the optical imaging lens. 2.The optical imaging lens according to claim 1, characterized in that, half of a diagonal line length of an effective pixel area on an imaging surface of the optical imaging lens, a distance TTL from the object side surface of the first lens to the imaging surface along the optical axis, and a refractive index N8 of the eighth lens satisfy: 1.05≤ImgH / TTL×N8≤1.

12. 3.The optical imaging lens according to claim 1, wherein, an effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy: -3.78≤(f1-f2) / (f1+f2)≤-1.

84.

4. The optical imaging lens according to claim 1, characterized in that, a curvature radius R of an object side surface of the seventh lens 13 a curvature radius R of an image side surface of the seventh lens 14 satisfies: -0.30 < (R 13 - R 14 ) / (R 13 + R 14 ) ≤ 0.

68.

5. The optical imaging lens according to claim 4, characterized in that, a curvature radius R2 of an image side surface of the first lens, a curvature radius R1 of an object side surface of the first lens, a curvature radius R 14 of an image side surface of the seventh lens, and a curvature radius R 13 satisfies: 2.71 < (R2 / R1) - (R 14 / R 13 ) ≤ 6.

57. 6.The optical imaging lens according to claim 1, wherein, a sum ∑CT of central thicknesses of the lenses in the first lens to the eighth lens on the optical axis and half of a diagonal line length ImgH of an effective pixel area on an imaging surface of the optical imaging lens satisfy: 0.63≤∑CT / ImgH≤0.

83. 7.The optical imaging lens according to claim 1, wherein, a central thickness CT1 of the first lens on the optical axis and a central thickness CT8 of the eighth lens on the optical axis satisfy: 1.57≤CT1 / CT8≤4.

45. 8.The optical imaging lens according to claim 4, wherein, a distance Tb from the image side surface of the seventh lens to the object side surface of the eighth lens along the optical axis and the central thickness CT8 of the eighth lens on the optical axis satisfy: 0.9<Tb / CT8≤10.

26. 9.The optical imaging lens according to claim 1, wherein, a maximum value CTmax of the central thicknesses of the lenses in the first lens to the eighth lens on the optical axis satisfy: 0.79mm≤CTmax≤0.99mm.

10. The optical imaging lens according to claim 9, characterized in that, a maximum value ETmax of edge thicknesses of the lenses in the first lens to the eighth lens satisfy: 1.10≤CTmax / ETmax≤2.

14.

11. The optical imaging lens according to any one of claims 1-10, wherein, The number V of lenses in the optical imaging lens with an Abbe number less than 40 40 satisfies: 3.00≤V 40 ≤4.00。 12. The optical imaging lens according to any one of claims 1-10, wherein, a shape of the eighth lens is formed by pressing after the eighth lens is attached to the infrared filter.

13. The optical imaging lens according to any one of claims 1-10, wherein, a material of the eighth lens is a force-deformable material.

14. The optical imaging lens according to claim 13, characterized in that, the material of the eighth lens is plastic or glue.

15. The optical imaging lens according to any one of claims 1-10, wherein, a material of the infrared filter is glass.

Images