Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with positive optical power; a second lens; a third lens with positive optical power; a fourth lens; a fifth lens with positive optical power; and a sixth lens with negative optical power; wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD<1.35; the effective focal length f3 of the third lens, the effective focal length f5 of the fifth lens, and the effective focal length f1 of the first lens satisfy: 0.9<(f3+f5) / f1<1.7.

Description

Technical Field

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

[0002] With the upgrading of consumer electronic products such as mobile phones and the development of image and video software functions on consumer electronic products, the camera function of mobile phones has become a field that mobile phone manufacturers are competing for.

[0003] Camera modules are usually provided on portable devices such as mobile phones to enable the mobile phones to have camera functions. For example, a multi-camera module including multiple optical imaging lenses may be provided on a mobile phone. Each optical imaging lens realizes different functions and achieves the expected effect by being used in combination. At present, the rear camera modules of high-end flagship phones usually adopt: a combination of high-definition main camera, ultra-wide-angle lens and telephoto lens to achieve high-definition shooting of various object distances. However, with the continuous development of camera functions and the diversification of camera needs, the practicality of camera modules has also become an important part of the camera function. For example, when taking portraits, the high-definition shooting effect is not the most important effect. What is important is to reflect the subject being photographed while blurring other parts, that is, to obtain a small depth of field.

[0004] In order to meet the needs of miniaturization and imaging requirements, an optical imaging lens is needed that can take into account miniaturization, ultra-large aperture, and telephoto. Summary of the invention

[0005] The present application provides an optical imaging lens that is applicable to portable electronic products and can at least solve or partially solve at least one of the above-mentioned shortcomings in the prior art.

[0006] The present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with positive optical power; a second lens; a third lens with positive optical power; a fourth lens; a fifth lens with positive optical power; and a sixth lens with negative optical power; wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens can satisfy: f / EPD<1.35; the effective focal length f3 of the third lens, the effective focal length f5 of the fifth lens and the effective focal length f1 of the first lens can satisfy: 0.9<(f3+f5) / f1<1.7.

[0007] In one embodiment, at least one aspherical mirror surface is provided from the object side surface of the first lens to the image side surface of the sixth lens.

[0008] In one embodiment, the effective focal length f4 of the fourth lens, the effective focal length f6 of the sixth lens, and the effective focal length f2 of the second lens may satisfy: 0.5<(f4+f6) / f2<1.7.

[0009] 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, and the total effective focal length f of the optical imaging lens may satisfy: 0.6<(R2-R1) / f<1.3.

[0010] In one embodiment, a curvature radius R3 of the object-side surface of the second lens and a curvature radius R4 of the image-side surface of the second lens may satisfy: 1.3<R3 / R4<1.8.

[0011] In one embodiment, a curvature radius R7 of the object-side surface of the fourth lens and a curvature radius R8 of the image-side surface of the fourth lens may satisfy: 2.6<(R7+R8) / (R7-R8)<5.0.

[0012] In one embodiment, the center thickness CT4 of the fourth lens on the optical axis, the spacing distance T45 between the fourth lens and the fifth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the spacing distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy: 1.0<(CT4+T45) / (CT5+T56)<1.5.

[0013] In one embodiment, an effective half-aperture DT11 of the object-side surface of the first lens and an effective half-aperture DT31 of the object-side surface of the third lens may satisfy: 1.2<DT11 / DT31<1.5.

[0014] In one embodiment, the effective semi-aperture DT12 of the image side surface of the first lens, the effective semi-aperture DT61 of the object side surface of the sixth lens, and the effective semi-aperture DT62 of the image side surface of the sixth lens may satisfy: 0.6<DT12 / (DT61+DT62)<0.9.

[0015] In one embodiment, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis may satisfy: 0.6<CT1 / (CT2+CT3)<1.2.

[0016] In one embodiment, the combined focal length f23 of the second lens and the third lens and the distance TTL on the optical axis from the object side surface of the first lens to the imaging surface may satisfy: 0.8<f23 / TTL<3.1.

[0017] In one embodiment, the on-axis distance SAG22 between the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens and the on-axis distance SAG31 between the intersection of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens may satisfy: 0.9<SAG22 / SAG31<1.3.

[0018] In one embodiment, the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens and the on-axis distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens may satisfy: -1.9<SAG41 / SAG61<-0.7.

[0019] Another aspect of the present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with positive optical power; a second lens; a third lens with positive optical power; a fourth lens; a fifth lens with positive optical power; and a sixth lens with negative optical power; wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens can satisfy: f / EPD<1.35; the combined focal length f23 of the second lens and the third lens and the distance TTL on the optical axis from the object side surface of the first lens to the imaging surface can satisfy: 0.8<f23 / TTL<3.1.

[0020] In one embodiment, the effective focal length f4 of the fourth lens, the effective focal length f6 of the sixth lens, and the effective focal length f2 of the second lens may satisfy: 0.5<(f4+f6) / f2<1.7.

[0021] 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, and the total effective focal length f of the optical imaging lens may satisfy: 0.6<(R2-R1) / f<1.3.

[0022] In one embodiment, the effective focal length f3 of the third lens, the effective focal length f5 of the fifth lens, and the effective focal length f1 of the first lens may satisfy: 0.9<(f3+f5) / f1<1.7.

[0023] In one embodiment, a curvature radius R3 of the object-side surface of the second lens and a curvature radius R4 of the image-side surface of the second lens may satisfy: 1.3<R3 / R4<1.8.

[0024] In one embodiment, a curvature radius R7 of the object-side surface of the fourth lens and a curvature radius R8 of the image-side surface of the fourth lens may satisfy: 2.6<(R7+R8) / (R7-R8)<5.0.

[0025] In one embodiment, the center thickness CT4 of the fourth lens on the optical axis, the spacing distance T45 between the fourth lens and the fifth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the spacing distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy: 1.0<(CT4+T45) / (CT5+T56)<1.5.

[0026] In one embodiment, an effective half-aperture DT11 of the object-side surface of the first lens and an effective half-aperture DT31 of the object-side surface of the third lens may satisfy: 1.2<DT11 / DT31<1.5.

[0027] In one embodiment, the effective semi-aperture DT12 of the image side surface of the first lens, the effective semi-aperture DT61 of the object side surface of the sixth lens, and the effective semi-aperture DT62 of the image side surface of the sixth lens may satisfy: 0.6<DT12 / (DT61+DT62)<0.9.

[0028] In one embodiment, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis may satisfy: 0.6<CT1 / (CT2+CT3)<1.2.

[0029] In one embodiment, the on-axis distance SAG22 between the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens and the on-axis distance SAG31 between the intersection of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens may satisfy: 0.9<SAG22 / SAG31<1.3.

[0030] In one embodiment, the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens and the on-axis distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens may satisfy: -1.9<SAG41 / SAG61<-0.7.

[0031] The present application adopts six lenses, and by reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between each lens, the structure of each lens is compact and the processing formability is good. The above optical imaging lens has at least one beneficial effect of ultra-large aperture, telephoto, low tolerance sensitivity, etc. The above optical imaging lens has high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0033] Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown; FIG. 2A to FIG. 2D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 1 are respectively shown;

[0034] Figure 3A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown; FIG. 4A to FIG. 4D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 2 are respectively shown;

[0035] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown; FIG. 6A to FIG. 6D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 3 are respectively shown;

[0036] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown; FIG. 8A to FIG. 8D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 4 are respectively shown;

[0037] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown; FIG. 10A to FIG. 10D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown;

[0038] Fig.11 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown; FIG. 12A to FIG. 12D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 6 are respectively shown. DETAILED DESCRIPTION

[0039] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0041] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0042] 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 not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0043] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0044] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] The features, principles and other aspects of the present application are described in detail below.

[0047] The optical imaging lens according to the exemplary embodiment of the present application may include, for example, six lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged in sequence from the object side to the image side along the optical axis. Among the first lens to the sixth lens, any two adjacent lenses may have an air gap between them.

[0048] In an exemplary embodiment, the first lens has positive power; the second lens has positive power or negative power; the third lens has positive power; the fourth lens has positive power or negative power; the fifth lens has positive power; and the sixth lens has negative power. The first lens with positive power can converge the light entering the optical imaging lens. The third lens with positive power can cooperate with two lenses located on its object side to eliminate spherical aberration. The fifth lens with positive power can cooperate with the fourth lens to eliminate aberration. The sixth lens with negative power can cooperate with the fourth lens and the fifth lens to eliminate astigmatism and distortion.

[0049] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula f / EPD<1.35, wherein f is the total effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens. By controlling the ratio of the total effective focal length to the entrance pupil diameter, the aperture number Fno of the optical imaging lens can be controlled, that is, the aperture size of the optical imaging lens can be controlled. Satisfying f / EPD<1.35 can make the optical imaging lens have an ultra-large aperture, and is conducive to enabling the optical imaging lens to obtain a large amount of light input. Moreover, compared with the depth of field effect brought by the focal length characteristics of the optical imaging lens, the large aperture can bring a more obvious depth of field effect. In addition, on the basis of the ultra-large aperture, combined with the telephoto characteristics of the optical imaging lens, a smaller depth of field can be obtained, achieving a better blurring effect, and thus better highlighting the subject being photographed. The optical imaging lens provided in the present application has a better portrait shooting effect. Furthermore, f and EPD can satisfy: f / EPD<1.31.

[0050] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.9<(f3+f5) / f1<1.7, wherein f3 is the effective focal length of the third lens, f5 is the effective focal length of the fifth lens, and f1 is the effective focal length of the first lens. Satisfying 0.9<(f3+f5) / f1<1.7 can reasonably distribute the optical power of the first lens, the third lens, and the fifth lens, which is beneficial to the reasonable distribution of the optical power of each lens in space and is also beneficial to reducing the aberration of the optical imaging lens. Furthermore, f3, f5, and f1 may satisfy: 0.95<(f3+f5) / f1<1.65.

[0051] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.5<(f4+f6) / f2<1.7, wherein f4 is the effective focal length of the fourth lens, f6 is the effective focal length of the sixth lens, and f2 is the effective focal length of the second lens. Satisfying 0.5<(f4+f6) / f2<1.7 can reasonably distribute the optical power of the second lens, the fourth lens, and the sixth lens, which is beneficial to the reasonable distribution of the optical power of each lens in space and is also beneficial to reducing the aberration of the optical imaging lens. Furthermore, f4, f6, and f2 may satisfy: 0.55<(f4+f6) / f2<1.65.

[0052] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.6<(R2-R1) / f<1.3, wherein R2 is the radius of curvature of the image side surface of the first lens, R1 is the radius of curvature of the object side surface of the first lens, and f is the total effective focal length of the optical imaging lens. Satisfying 0.6<(R2-R1) / f<1.3 is conducive to reducing the aberration of the optical imaging lens.

[0053] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.3<R3 / R4<1.8, where R3 is the radius of curvature of the object side of the second lens, and R4 is the radius of curvature of the image side of the second lens. By controlling the ratio of the radius of curvature of the two mirror surfaces of the second lens within this range, it is helpful to reasonably adjust the aberration contribution of the second lens to the optical imaging lens. Furthermore, R3 and R4 may satisfy: 1.35<R3 / R4<1.75.

[0054] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 2.6<(R7+R8) / (R7-R8)<5.0, wherein R7 is the radius of curvature of the object side surface of the fourth lens, and R8 is the radius of curvature of the image side surface of the fourth lens. When 2.6<(R7+R8) / (R7-R8)<5.0 is satisfied, the radius of curvature of the object side surface of the fourth lens and the radius of curvature of the image side surface can be controlled, and then the contribution of the astigmatism of the object side surface and the image side surface of the fourth lens can be effectively controlled, thereby effectively and reasonably controlling the image quality of the intermediate field of view and aperture zone.

[0055] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.0<(CT4+T45) / (CT5+T56)<1.5, wherein CT4 is the center thickness of the fourth lens on the optical axis, T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, and T56 is the spacing distance between the fifth lens and the sixth lens on the optical axis. Satisfying 1.0<(CT4+T45) / (CT5+T56)<1.5 can control the thickness of each of the fourth lens and the fifth lens and the air spacing at the image side of each of the fourth lens and the fifth lens, which is beneficial to avoid the thickness of the two lenses being too large, thereby avoiding affecting the spatial distribution of the lenses, so as to facilitate the assembly of the optical imaging lens. Furthermore, CT4, T45, CT5 and T56 may satisfy: 1.15<(CT4+T45) / (CT5+T56)<1.49.

[0056] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.2<DT11 / DT31<1.5, wherein DT11 is the effective semi-aperture of the object side of the first lens, and DT31 is the effective semi-aperture of the object side of the third lens. By controlling the ratio of the effective semi-aperture of the object side of the first lens to the effective semi-aperture of the object side of the third lens within this range, it is beneficial to achieve a large image surface and make the size change of the optical imaging lens in the radial direction of the optical axis smoother. Furthermore, DT11 and DT31 may satisfy: 1.24<DT11 / DT31<1.40.

[0057] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.6<DT12 / (DT61+DT62)<0.9, wherein DT12 is the effective semi-aperture of the image side surface of the first lens, DT61 is the effective semi-aperture of the object side surface of the sixth lens, and DT62 is the effective semi-aperture of the image side surface of the sixth lens. Satisfying 0.6<DT12 / (DT61+DT62)<0.9 is conducive to making the size distribution of the optical imaging lens in the radial direction of the optical axis more reasonable.

[0058] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.6<CT1 / (CT2+CT3)<1.2, wherein CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, and CT3 is the center thickness of the third lens on the optical axis. Satisfying 0.6<CT1 / (CT2+CT3)<1.2 can control the thickness of the three lenses, thereby facilitating the avoidance of the influence of excessive thickness of the lenses on the spatial distribution of the lenses, thereby facilitating the assembly of the optical imaging lens. Furthermore, CT1, CT2, and CT3 may satisfy: 0.67<CT1 / (CT2+CT3)<1.13.

[0059] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.8<f23 / TTL<3.1, wherein f23 is the combined focal length of the second lens and the third lens, and TTL is the distance from the object side of the first lens to the imaging surface on the optical axis. By controlling the ratio of the combined focal length of the second lens and the third lens to the total optical length within this range, it is beneficial to optimize the overall spatial structure layout of the optical imaging lens.

[0060] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.9<SAG22 / SAG31<1.3, wherein SAG22 is the on-axis distance between the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens, and SAG31 is the on-axis distance between the intersection of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens. By controlling the ratio of the sagittal height of the image side surface of the second lens to the sagittal height of the object side surface of the third lens within this range, it is helpful to limit the degree of curvature of the two lenses, thereby reducing the difficulty of lens processing and molding. Furthermore, SAG22 and SAG31 may satisfy: 0.96<SAG22 / SAG31<1.05.

[0061] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula -1.9<SAG41 / SAG61<-0.7, wherein SAG41 is the on-axis distance between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens, and SAG61 is the on-axis distance between the intersection of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens. By controlling the ratio of the sagitta of the object side surface of the fourth lens to the sagitta of the object side surface of the sixth lens within this range, it is helpful to limit the degree of curvature of the two lenses, thereby reducing the difficulty of lens processing and molding. Furthermore, SAG41 and SAG61 may satisfy: -1.84<SAG41 / SAG61<-0.76.

[0062] In an exemplary embodiment, the optical imaging lens may further include at least one aperture. The aperture may be disposed at an appropriate position as required, for example, between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0063] According to the above-mentioned implementation mode of the present application, the optical imaging lens can use multiple lenses, such as the six lenses mentioned above. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between each lens, the volume of the imaging lens can be effectively reduced, the sensitivity of the imaging lens can be reduced, and the processability of the imaging lens can be improved, so that the optical imaging lens is more conducive to production and processing and can be applied to portable electronic products. At the same time, the optical imaging lens of the present application also has excellent optical properties such as ultra-large aperture and long focal length. The depth of field of the optical imaging lens is related to the aperture number, focal length, etc. The smaller the aperture number (the larger the aperture), the smaller the depth of field; the longer the focal length, the smaller the depth of field; based on this, the optical imaging lens with a large aperture and a long focal length provided by the present application can obtain a smaller depth of field and achieve a better blur effect, that is, a better portrait shooting effect.

[0064] In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object side surface of the first lens to the image side surface of the sixth lens is an aspherical mirror surface. The characteristic of the aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all aspherical mirror surfaces.

[0065] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiments, the optical imaging lens is not limited to including six lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0066] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0067] Example 1

[0068] The following reference Figures 1 to 2D An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown.

[0069] like Figure 1 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture 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 and a filter E7.

[0070] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and the light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0071] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0072]

[0073] Table 1

[0074] In Example 1, the total effective focal length f of the optical imaging lens is 8.95 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 is 10.72 mm, and the half diagonal length ImgH of the effective pixel area on the imaging surface S15 is 2.65 mm.

[0075] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the sixth lens E6 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0076]

[0077] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 10 , A 12 , A14 , A 16 , A 18 and A 20 .

[0078] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -6.2388E-04 -4.3523E-05 2.2274E-05 -1.0937E-05 3.3736E-06 -7.6249E-07 1.2644E-07 -1.5266E-08 1.3267E-09 S2 6.3655E-03 1.6412E-03 -3.6044E-03 1.7680E-03 -4.9420E-04 9.1945E-05 -1.2074E-05 1.1475E-06 -7.9437E-08 S3 9.5039E-03 7.1576E-04 -8.7971E-04 -7.5844E-04 7.1532E-04 -2.7071E-04 6.1682E-05 -9.4026E-06 9.9579E-07 S4 9.1307E-03 -1.0449E-02 2.3881E-02 -2.3506E-02 1.2367E-02 -3.9659E-03 8.0719E-04 -1.0063E-04 6.0212E-06 S5 5.4758E-03 -1.2237E-02 2.6095E-02 -2.5008E-02 1.3195E-02 -4.3092E-03 9.0861E-04 -1.2188E-04 9.2023E-06 S6 -3.5589E-03 1.6577E-03 -7.5379E-04 6.2663E-04 -5.1820E-04 2.9372E-04 -1.1472E-04 3.1545E-05 -6.1517E-06 S7 -2.0915E-02 2.5407E-03 -1.0560E-03 2.3417E-03 -3.4593E-03 3.0699E-03 -1.8032E-03 7.3208E-04 -2.0881E-04 S8 -2.5525E-02 7.9232E-04 9.0279E-03 -2.8793E-02 5.5399E-02 -7.0940E-02 6.2453E-02 -3.8569E-02 1.6839E-02 S9 -9.8748E-03 1.6074E-03 -1.3019E-02 3.4467E-02 -5.9439E-02 6.8994E-02 -5.6236E-02 3.2831E-02 -1.3791E-02 S10 -2.2533E-02 5.0677E-03 9.8113E-04 -9.1234E-03 1.3421E-02 -1.1773E-02 6.9848E-03 -2.9141E-03 8.6482E-04 S11 -9.5199E-02 3.7466E-02 -1.3120E-02 8.3415E-03 -1.0387E-02 1.0913E-02 -7.6640E-03 3.6240E-03 -1.1778E-03 S12 -1.0314E-01 6.5606E-02 -6.5346E-02 6.5795E-02 -5.1769E-02 3.0104E-02 -1.2833E-02 4.0061E-03 -9.1181E-04

[0079] Table 2

[0080] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 2C The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2D The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 2A to FIG. 2D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0081] Example 2

[0082] The following reference Figures 3 to 4D The optical imaging lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown.

[0083] like Figure 3 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture 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 and a filter E7.

[0084] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and the light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0085] In Example 2, the total effective focal length f of the optical imaging lens is 8.95 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 is 10.72 mm, and the half diagonal length ImgH of the effective pixel area on the imaging surface S15 is 2.67 mm.

[0086] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 4 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 2, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0087]

[0088]

[0089] Table 3

[0090] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.4135E-04 -5.1540E-05 3.6249E-05 -2.4144E-05 9.0485E-06 -2.2421E-06 3.8603E-07 -4.7255E-08 4.1356E-09 S2 7.8485E-03 -3.2634E-03 3.9837E-04 6.0189E-05 -3.2874E-05 6.3842E-06 -7.3891E-07 5.5173E-08 -2.5963E-09 S3 1.5281E-02 -6.0806E-03 2.0340E-03 -1.0100E-03 4.4669E-04 -1.3455E-04 2.7435E-05 -3.8885E-06 3.8904E-07 S4 1.9880E-02 -1.5784E-02 1.6100E-02 -1.2524E-02 6.0310E-03 -1.8248E-03 3.4834E-04 -3.9010E-05 1.5747E-06 S5 1.1837E-02 -1.5366E-02 1.8844E-02 -1.5129E-02 7.5108E-03 -2.4157E-03 5.1889E-04 -7.4786E-05 7.0196E-06 S6 -3.4153E-04 1.4908E-03 -8.8837E-04 3.7573E-04 -1.8326E-04 8.2734E-05 -2.7781E-05 6.5988E-06 -1.1032E-06 S7 -2.3012E-02 2.9213E-03 2.8706E-03 -6.0383E-03 6.0773E-03 -4.0244E-03 1.8840E-03 -6.3827E-04 1.5700E-04 S8 -3.3357E-02 4.5446E-03 -2.5368E-03 4.6079E-03 -9.4761E-03 1.1918E-02 -9.6703E-03 5.3250E-03 -2.0387E-03 S9 -1.2840E-02 -4.8365E-03 7.8193E-03 -1.0734E-02 6.3159E-03 1.7742E-03 -6.2618E-03 5.3764E-03 -2.6373E-03 S10 -2.3161E-02 2.3396E-03 2.1284E-02 -4.8771E-02 6.4858E-02 -5.8859E-02 3.7900E-02 -1.7568E-02 5.8734E-03 S11 -4.7357E-02 1.4472E-02 1.5569E-02 -3.5335E-02 4.0331E-02 -3.0937E-02 1.6769E-02 -6.5308E-03 1.8330E-03 S12 -4.7827E-02 2.0708E-02 -1.3901E-02 1.0153E-02 -5.6546E-03 1.9446E-03 -2.5219E-04 -9.9760E-05 6.2491E-05

[0091] Table 4

[0092] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Figure 4B The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 4C The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4D The magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 4A to FIG. 4D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0093] Example 3

[0094] The following reference Figures 5 to 6D An optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0095] like Figure 5 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture 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 and a filter E7.

[0096] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and the light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0097] In Example 3, the total effective focal length f of the optical imaging lens is 8.95 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 is 10.72 mm, and the half diagonal length ImgH of the effective pixel area on the imaging surface S15 is 2.67 mm.

[0098] Table 5 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 6 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 3, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0099]

[0100]

[0101] Table 5

[0102] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -3.7275E-04 -8.8592E-05 5.3349E-05 -3.1861E-05 1.1681E-05 -2.8938E-06 5.0481E-07 -6.3387E-08 5.7587E-09 S2 8.3568E-03 -3.6953E-03 4.5752E-04 1.3334E-04 -7.7217E-05 1.8835E-05 -2.8984E-06 3.0743E-07 -2.3096E-08 S3 1.5438E-02 -5.2549E-03 3.4712E-04 2.5778E-04 -7.9481E-05 4.7735E-06 2.0318E-06 -5.4111E-07 5.9798E-08 S4 1.5810E-02 1.6007E-04 -7.0004E-03 5.3851E-03 -2.6763E-03 1.0987E-03 -3.7832E-04 1.0106E-04 -1.9664E-05 S5 7.1371E-03 2.4185E-03 -6.3118E-03 4.2505E-03 -1.9308E-03 7.6332E-04 -2.6944E-04 7.5537E-05 -1.5368E-05 S6 -1.6666E-04 1.8175E-03 -1.7156E-03 1.2123E-03 -7.5395E-04 3.6668E-04 -1.3091E-04 3.3762E-05 -6.2543E-06 S7 -2.4178E-02 3.3128E-03 3.0923E-03 -7.6128E-03 8.7978E-03 -6.6072E-03 3.4754E-03 -1.3152E-03 3.6020E-04 S8 -3.4830E-02 4.5894E-03 -3.1502E-04 -1.5455E-03 1.3531E-04 2.3310E-03 -3.1207E-03 2.1499E-03 -9.3331E-04 S9 -1.3507E-02 -2.8835E-03 7.4677E-04 5.3933E-03 -1.9763E-02 3.2210E-02 -3.2104E-02 2.1363E-02 -9.8080E-03 S10 -2.3748E-02 5.6138E-03 1.1038E-02 -2.9839E-02 4.1471E-02 -3.8752E-02 2.5597E-02 -1.2151E-02 4.1551E-03 S11 -4.6194E-02 1.5886E-02 1.1845E-02 -3.1540E-02 3.8856E-02 -3.1794E-02 1.8277E-02 -7.5193E-03 2.2231E-03 S12 -4.6109E-02 2.0296E-02 -1.4482E-02 1.1222E-02 -6.6542E-03 2.5659E-03 -5.2134E-04 -1.7529E-05 4.4847E-05

[0103] Table 6

[0104] Fig. 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.6D The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 6A to FIG. 6D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0105] Example 4

[0106] The following reference Figures 7 to 8D An optical imaging lens according to Embodiment 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown.

[0107] like Figure 7 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture 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 and a filter E7.

[0108] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and the light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0109] In Example 4, the total effective focal length f of the optical imaging lens is 8.95 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 is 10.72 mm, and the half of the diagonal length of the effective pixel area on the imaging surface S15 ImgH is 2.67 mm.

[0110] Table 7 shows the basic parameters of the optical imaging lens of Example 4, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 8 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 4, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0111]

[0112] Table 7

[0113] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -3.5315E-04 -1.7103E-04 1.9367E-04 -1.5995E-04 8.1125E-05 -2.7411E-05 6.4557E-06 -1.0856E-06 1.3136E-07 S2 7.9614E-03 -1.5846E-03 -2.7058E-03 2.5590E-03 -1.2255E-03 3.8475E-04 -8.5077E-05 1.3623E-05 -1.5913E-06 S3 1.4359E-02 -5.6948E-04 -6.4978E-03 5.4779E-03 -2.4973E-03 7.3450E-04 -1.4615E-04 1.9791E-05 -1.7761E-06 S4 1.0994E-02 1.6489E-02 -2.7598E-02 1.5977E-02 -1.9107E-03 -2.9750E-03 2.1469E-03 -7.6052E-04 1.6885E-04 S5 2.1658E-03 1.8187E-02 -2.4803E-02 1.1776E-02 1.5705E-03 -4.9838E-03 2.9827E-03 -1.0127E-03 2.2386E-04 S6 -2.2589E-04 2.5097E-03 -3.5959E-03 4.1689E-03 -3.8375E-03 2.5985E-03 -1.2769E-03 4.5625E-04 -1.1839E-04 S7 -2.5459E-02 5.8131E-03 -3.1613E-03 3.3959E-03 -4.4471E-03 4.7211E-03 -3.5497E-03 1.8630E-03 -6.8526E-04 S8 -3.6364E-02 7.3405E-03 -7.6255E-03 1.3076E-02 -1.9975E-02 2.1709E-02 -1.6104E-02 7.9694E-03 -2.5014E-03 S9 -1.4541E-02 1.3653E-03 -1.8313E-02 6.1125E-02 -1.3081E-01 1.8696E-01 -1.8573E-01 1.3102E-01 -6.6098E-02 S10 -2.5699E-02 1.1101E-02 -3.7115E-03 -1.3364E-03 3.9193E-03 -4.4506E-03 3.3975E-03 -1.8368E-03 7.0534E-04 S11 -4.7707E-02 1.9837E-02 5.2231E-03 -2.2490E-02 3.0313E-02 -2.6535E-02 1.6284E-02 -7.1552E-03 2.2605E-03 S12 -4.6566E-02 1.8514E-02 -7.5236E-03 -3.5913E-04 5.2407E-03 -5.6939E-03 3.5108E-03 -1.4265E-03 3.9880E-04

[0114] Table 8

[0115] Fig. 8AThe axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 8C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.8D The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 8A to FIG. 8D It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0116] Example 5

[0117] The following reference Figures 9 to 10D An optical imaging lens according to Embodiment 5 of the present application is described. Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown.

[0118] like Fig. 9 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture 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 and a filter E7.

[0119] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and the light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0120] In Example 5, the total effective focal length f of the optical imaging lens is 8.92 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 is 10.72 mm, and the half diagonal length ImgH of the effective pixel area on the imaging surface S15 is 2.65 mm.

[0121] Table 9 shows the basic parameters of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 10 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 5, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0122]

[0123] Table 9

[0124]

[0125]

[0126] Table 10

[0127] Fig. 10A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Fig. 10B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 10C The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig. 10D The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 10A to FIG. 10D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0128] Example 6

[0129] The following reference Figures 11 to 12D An optical imaging lens according to Embodiment 6 of the present application is described. Fig.11 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0130] like Fig.11 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture 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 and a filter E7.

[0131] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and the light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0132] In Example 6, the total effective focal length f of the optical imaging lens is 8.92 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 is 10.72 mm, and the half diagonal length ImgH of the effective pixel area on the imaging surface S15 is 2.65 mm.

[0133] Table 11 shows the basic parameters of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 12 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 6, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0134]

[0135]

[0136] Table 11

[0137] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -6.6631E-04 -8.1899E-05 8.1485E-05 -6.7365E-05 3.1903E-05 -9.7734E-06 2.0547E-06 -3.0606E-07 3.2682E-08 S2 8.7199E-03 -5.2953E-03 1.2431E-03 1.3395E-05 -1.0182E-04 3.3803E-05 -6.2061E-06 7.4400E-07 -6.0954E-08 S3 1.7442E-02 -9.1541E-03 3.1990E-03 -1.1370E-03 4.9094E-04 -1.8753E-04 5.1118E-05 -9.6047E-06 1.2516E-06 S4 2.2521E-02 -1.4316E-02 7.9697E-03 -5.0878E-03 2.8349E-03 -1.1110E-03 2.8951E-04 -4.9377E-05 5.2933E-06 S5 1.3116E-02 -9.6364E-03 5.2592E-03 -3.0205E-03 1.4373E-03 -4.4327E-04 6.9948E-05 1.1765E-06 -2.9589E-06 S6 2.2026E-03 8.0884E-05 -9.7746E-04 9.6991E-04 -6.5378E-04 3.2238E-04 -1.1570E-04 3.0097E-05 -5.6472E-06 S7 -2.3195E-02 2.8061E-03 1.4386E-03 -4.1164E-03 5.2430E-03 -4.2096E-03 2.3097E-03 -8.9529E-04 2.4777E-04 S8 -3.5637E-02 2.7457E-03 5.2152E-03 -1.6381E-02 2.6627E-02 -2.8384E-02 2.0947E-02 -1.0972E-02 4.1102E-03 S9 -1.2255E-02 -1.1475E-03 -5.1074E-03 1.5291E-02 -2.9655E-02 3.7667E-02 -3.2873E-02 2.0211E-02 -8.8341E-03 S10 -2.9939E-02 1.3906E-02 -1.6766E-03 -7.9974E-03 1.2106E-02 -1.0700E-02 6.5684E-03 -2.9018E-03 9.2702E-04 S11 -5.0432E-02 2.2038E-02 -9.3641E-04 -9.4854E-03 1.2277E-02 -9.8440E-03 5.6113E-03 -2.3321E-03 7.0746E-04 S12 -4.2133E-02 1.6127E-02 -1.2038E-02 1.2108E-02 -1.0154E-02 6.1677E-03 -2.6899E-03 8.4855E-04 -1.9397E-04

[0138] Table 12

[0139] Fig. 12A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Fig. 12B The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.12D The magnification chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 12A to FIG. 12D It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0140] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0141] Conditional formula\Example 1 2 3 4 5 6 f / EPD 1.03 1.05 1.10 1.30 1.20 1.16 (f3+f5) / f1 1.61 1.20 1.14 1.11 0.96 1.01 (f4+f6) / f2 1.60 0.91 0.86 0.81 0.56 0.56 (R2-R1) / f 1.26 0.96 0.91 0.88 0.63 0.72 R3 / R4 1.74 1.56 1.54 1.53 1.39 1.38 (R7+R8) / (R7-R8) 4.94 3.52 3.40 3.28 2.68 2.89 (CT4+T45) / (CT5+T56) 1.23 1.19 1.18 1.18 1.31 1.48 DT11 / DT31 1.38 1.36 1.36 1.32 1.26 1.25 DT12 / (DT61+DT62) 0.86 0.85 0.81 0.67 0.75 0.79 CT1 / (CT2+CT3) 1.12 0.92 0.91 0.90 0.77 0.69 f23 / TTL 3.09 1.36 1.27 1.21 0.89 0.94 SAG22 / SAG31 0.99 0.97 0.98 1.00 1.03 1.02 SAG41 / SAG61 -0.79 -1.83 -1.44 -1.12 -0.78 -1.01

[0142] Table 13

[0143] The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging, and the electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0144] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of protection involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the present application. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical solution.

Claims

1. An optical imaging lens, characterized in that: Along the optical axis from the object side to the image side, they include: The first lens has positive refractive power, and its object side surface is convex and its image side surface is concave; The second lens has a negative optical power, and its object side surface is convex and its image side surface is concave; The third lens has positive power and its object side surface is convex; a fourth lens element having negative optical power, whose object side surface is convex and whose image side surface is concave; a fifth lens element having positive refractive power, the image-side surface of which is convex; and a sixth lens element having negative optical power, whose image side surface is concave; Wherein, the number of lenses having optical power in the optical imaging lens is six; The total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1.03≤f / EPD≤1.30; The effective focal length f3 of the third lens, the effective focal length f5 of the fifth lens and the effective focal length f1 of the first lens satisfy: 0.95<(f3+f5) / f1<1.

65.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens, the effective focal length f6 of the sixth lens and the effective focal length f2 of the second lens satisfy: 0.55<(f4+f6) / f2≤1.

60.

3. The optical imaging lens according to claim 1, wherein: 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, and the total effective focal length f of the optical imaging lens satisfy: 0.6<(R2-R1) / f<1.

3.

4. The optical imaging lens according to claim 1, wherein: The curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy: 1.35<R3 / R4<1.

75.

5. The optical imaging lens according to claim 1, wherein: The curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens satisfy: 2.68≤(R7+R8) / (R7-R8)≤4.

94.

6. The optical imaging lens according to claim 1, wherein: The center thickness CT4 of the fourth lens on the optical axis, the distance T45 between the fourth lens and the fifth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the distance T56 between the fifth lens and the sixth lens on the optical axis satisfy: 1.15<(CT4+T45) / (CT5+T56)<1.

49.

7. The optical imaging lens according to any one of claims 1 to 6, characterized in that: The effective half-aperture DT11 of the object-side surface of the first lens and the effective half-aperture DT31 of the object-side surface of the third lens satisfy: 1.24<DT11 / DT31<1.

40.

8. The optical imaging lens according to any one of claims 1 to 6, characterized in that: The effective half-aperture DT12 of the image-side surface of the first lens, the effective half-aperture DT61 of the object-side surface of the sixth lens, and the effective half-aperture DT62 of the image-side surface of the sixth lens satisfy: 0.67≤DT12 / (DT61+DT62)<0.

9.

9. The optical imaging lens according to any one of claims 1 to 6, characterized in that: The center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy: 0.67<CT1 / (CT2+CT3)<1.

13.

10. The optical imaging lens according to any one of claims 1 to 6, characterized in that: The combined focal length f23 of the second lens and the third lens and the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis satisfy: 0.89≤f23 / TTL<3.

1.

11. The optical imaging lens according to any one of claims 1 to 6, characterized in that: An axial distance SAG22 between the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens and an axial distance SAG31 between the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens satisfy: 0.96<SAG22 / SAG31<1.

05.

12. The optical imaging lens according to any one of claims 1 to 6, characterized in that: An axial distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens and an axial distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens satisfy: -1.84<SAG41 / SAG61<-0.76.

Images