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: a fourth lens; a fifth lens, whose image side surface is a concave surface; a sixth lens with positive optical power; and a seventh lens with negative optical power, whose object side surface is a convex surface and image side surface is a concave surface; wherein half of the diagonal length of the effective pixel area on the imaging surface ImgH, the entrance pupil diameter EPD of the optical lens, and the total effective focal length f of the optical imaging lens can satisfy: ImgH×EPD / f>3.5mm.

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] Mobile phones and other portable devices are usually equipped with camera modules to enable the mobile phones to have camera functions. The camera module is usually equipped with a charge-coupled device (CCD) type image sensor or a complementary metal oxide semiconductor (CMOS) type image sensor, and an optical imaging lens. The optical imaging lens can collect the light on the object side, and the imaging light travels along the optical path of the optical imaging lens and irradiates the image sensor, and then the image sensor converts the light signal into an electrical signal to form image data.

[0003] People are increasingly fond of taking photos with their mobile phones in their daily lives, and they expect their mobile phones to have powerful shooting functions. As a result, optical imaging lenses are constantly updated with market demand. Optical imaging lenses are usually expected to have characteristics such as large aperture, large image surface, ultra-thin, wide angle, telephoto, and small head. However, when an optical imaging lens meets requirements in one aspect, it will always affect performance in other aspects. Therefore, one development direction of the camera module is to set up multiple optical imaging lenses. However, it is still hoped that the performance of a single optical imaging lens can be improved, even if it has high design difficulty.

[0004] In order to meet the installation requirements, imaging requirements and other requirements of portable devices, an optical imaging lens is needed that can take into account at least two of miniaturization, ultra-large aperture, large image surface, low noise and high imaging quality. Summary of the invention

[0005] 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: a fourth lens; a fifth lens, whose image side surface is concave; a sixth lens with positive optical power; and a seventh lens with negative optical power, whose object side surface is convex and whose image side surface is concave; wherein half of the diagonal length of an effective pixel area on the imaging plane ImgH, an entrance pupil diameter EPD of the optical lens, and a total effective focal length f of the optical imaging lens can satisfy: ImgH×EPD / f>3.5mm.

[0006] 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 seventh lens.

[0007] In one embodiment, the total effective focal length f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens may satisfy: 5.5 mm<f×tan(FOV / 2)<6.5 mm.

[0008] In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: f / EPD<1.7.

[0009] In one embodiment, the maximum field of view FOV of the optical imaging lens may satisfy: 80°<FOV<100°.

[0010] In one embodiment, the effective focal length f2 of the second lens, the effective focal length f5 of the fifth lens, and the effective focal length f3 of the third lens may satisfy: 1.0<(f2+f5) / f3<1.5.

[0011] In one embodiment, the effective focal length f4 of the fourth lens, the effective focal length f1 of the first lens, and the effective focal length f6 of the sixth lens may satisfy: 1.2<f4 / (f1+f6)<1.6.

[0012] In one embodiment, a curvature radius R14 of the image-side surface of the seventh lens, a curvature radius R13 of the object-side surface of the seventh lens, and an effective focal length f7 of the seventh lens may satisfy: 1.7<(R14-R13) / f7<2.2.

[0013] In one embodiment, a curvature radius R2 of the image-side surface of the first lens and a curvature radius R1 of the object-side surface of the first lens may satisfy: 1.5<(R2+R1) / (R2-R1)<2.0.

[0014] In one embodiment, the axial distance TTL from the object side surface of the first lens to the imaging surface and half the diagonal length of the effective pixel area on the imaging surface ImgH may satisfy: TTL / ImgH<1.4.

[0015] In one embodiment, the combined focal length f12 of the first lens and the second lens, the center thickness CT1 of the first lens on the optical axis, and the center thickness CT2 of the second lens on the optical axis may satisfy: 5.5<f12 / (CT1+CT2)<6.5.

[0016] In one embodiment, a center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens may satisfy: 2.0<CT4 / ET4<2.5.

[0017] In one embodiment, the on-axis distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis to the effective radius vertex of the object side surface of the seventh 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: 1.8<SAG71 / SAG61<2.3.

[0018] In one embodiment, a center thickness CT6 of the sixth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, and a spacing distance T67 between the sixth lens and the seventh lens on the optical axis may satisfy: 1.4<(CT6+CT7) / T67<1.8.

[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; a fourth lens; a fifth lens, whose image-side surface is concave; a sixth lens with positive optical power; and a seventh lens with negative optical power, whose object-side surface is convex and whose image-side surface is concave; wherein a curvature radius R14 of the image-side surface of the seventh lens, a curvature radius R13 of the object-side surface of the seventh lens, and an effective focal length f7 of the seventh lens may satisfy: 1.7<(R14-R13) / f7<2.2.

[0020] In one embodiment, the total effective focal length f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens may satisfy: 5.5 mm<f×tan(FOV / 2)<6.5 mm.

[0021] In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: f / EPD<1.7.

[0022] In one embodiment, the maximum field of view FOV of the optical imaging lens may satisfy: 80°<FOV<100°.

[0023] In one embodiment, the effective focal length f2 of the second lens, the effective focal length f5 of the fifth lens, and the effective focal length f3 of the third lens may satisfy: 1.0<(f2+f5) / f3<1.5.

[0024] In one embodiment, the effective focal length f4 of the fourth lens, the effective focal length f1 of the first lens, and the effective focal length f6 of the sixth lens may satisfy: 1.2<f4 / (f1+f6)<1.6.

[0025] In one embodiment, half of the diagonal length of the effective pixel area on the imaging plane ImgH, the entrance pupil diameter EPD of the optical lens, and the total effective focal length f of the optical imaging lens may satisfy: ImgH×EPD / f>3.5mm.

[0026] In one embodiment, a curvature radius R2 of the image-side surface of the first lens and a curvature radius R1 of the object-side surface of the first lens may satisfy: 1.5<(R2+R1) / (R2-R1)<2.0.

[0027] In one embodiment, the axial distance TTL from the object side surface of the first lens to the imaging surface and half the diagonal length of the effective pixel area on the imaging surface ImgH may satisfy: TTL / ImgH<1.4.

[0028] In one embodiment, the combined focal length f12 of the first lens and the second lens, the center thickness CT1 of the first lens on the optical axis, and the center thickness CT2 of the second lens on the optical axis may satisfy: 5.5<f12 / (CT1+CT2)<6.5.

[0029] In one embodiment, a center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens may satisfy: 2.0<CT4 / ET4<2.5.

[0030] In one embodiment, the on-axis distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis to the effective radius vertex of the object side surface of the seventh 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: 1.8<SAG71 / SAG61<2.3.

[0031] In one embodiment, a center thickness CT6 of the sixth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, and a spacing distance T67 between the sixth lens and the seventh lens on the optical axis may satisfy: 1.4<(CT6+CT7) / T67<1.8.

[0032] The present application uses seven lenses, and by reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between each lens, the above optical imaging lens has at least one beneficial effect of miniaturization, ultra-large aperture, large image surface, low noise, and high imaging quality. For example, the present application can achieve miniaturization and a large image surface. On the other hand, the present application can also achieve a large image surface and high imaging quality. Usually, when pursuing a large aperture, the light throughput of the optical imaging system will also be increased, thereby improving the texture of the picture, but increasing the light throughput will also make the imaging noise more, and the optical imaging lens provided by the present application also has a low noise effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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:

[0034] Figure 1A 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;

[0035] Figure 3 A 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;

[0036] 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;

[0037] 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;

[0038] 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;

[0039] 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

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] The features, principles and other aspects of the present application are described in detail below.

[0048] The optical imaging lens according to the exemplary embodiment of the present application may include, for example, seven lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven lenses are arranged in sequence from the object side to the image side along the optical axis. Among the first lens to the seventh lens, any two adjacent lenses may have an air gap between them.

[0049] In an exemplary embodiment, the first lens may have positive optical power; the second lens has positive optical power or negative optical power; the third lens has positive optical power or negative optical power; the fourth lens has positive optical power or negative optical power; the fifth lens has positive optical power or negative optical power, and its image side surface is concave; the sixth lens has positive optical power or negative optical power; the seventh lens may have negative optical power, its object side surface is convex, and its image side surface is concave. Among them, the first lens with positive optical power has a converging effect on imaging light. The first lens combined with the second lens, the third lens and the fourth lens is conducive to the comprehensive correction of imaging aberrations such as chromatic aberration, spherical aberration and astigmatism. The fifth lens with a concave image side surface is conducive to the divergence of the external field of view, thereby achieving the purpose of increasing the imaging surface. In addition, the light transmitted through the fifth lens can be converged after continuing to pass through the sixth lens with positive optical power, thereby avoiding the phenomenon of excessive steepness of local transmission of light; finally, the light passes through the seventh lens with a convex surface on the object side and a concave surface on the image side and with negative optical power. The seventh lens is beneficial to further increase the range of the imaging surface of the optical imaging lens.

[0050] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula ImgH×EPD / f>3.5mm, wherein ImgH is half of the diagonal length of the effective pixel area on the imaging plane, EPD is the entrance pupil diameter of the optical lens, and f is the total effective focal length of the optical imaging lens. Satisfying ImgH×EPD / f>3.5mm can ensure that the optical imaging lens has a sufficiently large imaging surface and a large aperture. A large aperture is crucial for mobile phone photography. By increasing the aperture, the amount of light transmitted by the optical imaging lens can be increased, thereby improving the texture of the picture. More specifically, ImgH, EPD, and f may satisfy: 3.75mm<ImgH×EPD / f<4.00mm.

[0051] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 5.5mm<f×tan(FOV / 2)<6.5mm, where f is the total effective focal length of the optical imaging lens, and FOV is the maximum field of view of the optical imaging lens. Satisfying 5.5mm<f×tan(FOV / 2)<6.5mm is conducive to controlling the imaging parameters of the optical imaging lens, and is also conducive to controlling the aperture size of each lens, thereby reducing the size of the lens to a certain extent, and further reducing the sensitivity of the lens. More specifically, f and FOV may satisfy: 5.90mm<f×tan(FOV / 2)<6.25mm.

[0052] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula f / EPD<1.7, where f is the total effective focal length of the optical imaging lens and the entrance pupil diameter of the optical imaging lens. Satisfying f / EPD<1.7 is conducive to increasing the aperture of the optical imaging lens, thereby achieving the effect of increasing the amount of light passing, thereby improving the quality of the captured image. More specifically, f and EPD may satisfy: f / EPD<1.63.

[0053] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 80°<FOV<100°, where FOV is the maximum field of view angle of the optical imaging lens. Satisfying 80°<FOV<100° can ensure that the optical imaging lens has a sufficiently large field of view range and increase the object capture space of the optical imaging lens. As a result, the picture captured by the optical imaging lens has a majestic texture. More specifically, FOV can satisfy: 84.4°<FOV<87.5°.

[0054] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.0<(f2+f5) / f3<1.5, where f2 is the effective focal length of the second lens, f5 is the effective focal length of the fifth lens, and f3 is the effective focal length of the third lens. Satisfying 1.0<(f2+f5) / f3<1.5 can balance aberrations, and at the same time, the lens shapes of the second lens, the third lens, and the fifth lens can be properly controlled, thereby facilitating the processing and molding of the lens. More specifically, f2, f3, and f5 may satisfy: 1.23<(f2+f5) / f3<1.40.

[0055] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.2<f4 / (f1+f6)<1.6, wherein f4 is the effective focal length of the fourth lens, f1 is the effective focal length of the first lens, and f6 is the effective focal length of the sixth lens. Satisfying 1.2<f4 / (f1+f6)<1.6 can reasonably distribute the optical power of the first lens, the fourth lens, and the sixth lens, which is beneficial to reduce the field curvature of the optical imaging lens under macro conditions, thereby reducing the aberration of the optical imaging lens under macro conditions. More specifically, f4, f1, and f6 may satisfy: 1.30<f4 / (f1+f6)<1.40.

[0056] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.7<(R14-R13) / f7<2.2, wherein R14 is the radius of curvature of the image side surface of the seventh lens, R13 is the radius of curvature of the object side surface of the seventh lens, and f7 is the effective focal length of the seventh lens. Satisfying 1.7<(R14-R13) / f7<2.2 can control the shape of the seventh lens, thereby facilitating the processing and molding of the seventh lens and reducing the sensitivity of the seventh lens. At the same time, the shape of the seventh lens can improve the tail stray light of the optical imaging lens, thereby reducing noise and improving imaging quality. More specifically, R14, R13 and f7 can satisfy: 1.75<(R14-R13) / f7<2.15.

[0057] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.5<(R2+R1) / (R2-R1)<2.0, wherein R2 is the radius of curvature of the image side surface of the first lens, and R1 is the radius of curvature of the object side surface of the first lens. Satisfying 1.5<(R2+R1) / (R2-R1)<2.0 can constrain the shape of the first lens and control the optical power of the first lens at the same time; thereby improving the ghost image generated by the internal reflection of the first lens itself. More specifically, R2 and R1 may satisfy: 1.63<(R2+R1) / (R2-R1)<1.70.

[0058] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula TTL / ImgH<1.4, wherein TTL is the on-axis distance from the object side of the first lens to the imaging plane, and ImgH is half the diagonal length of the effective pixel area on the imaging plane. Satisfying TTL / ImgH<1.4 can enable the optical imaging lens to have a larger imaging surface and, on this basis, a smaller size. The optical imaging lens is suitable for portable devices. More specifically, TTL and ImgH may satisfy: 1.29<TTL / ImgH<1.36.

[0059] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 5.5<f12 / (CT1+CT2)<6.5, wherein f12 is the combined focal length of the first lens and the second lens, CT1 is the center thickness of the first lens on the optical axis, and CT2 is the center thickness of the second lens on the optical axis. Satisfying 5.5<f12 / (CT1+CT2)<6.5 can constrain the lens shapes of the first lens and the second lens, and reasonably allocate the optical power of the first lens and the second lens, thereby reducing the spherical aberration and chromatic aberration of the optical imaging lens by constraining the optical power of the first two lenses, so that the optical imaging lens has good imaging performance. More specifically, f12, CT1, and CT2 may satisfy: 5.90<f12 / (CT1+CT2)<6.00.

[0060] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 2.0<CT4 / ET4<2.5, wherein CT4 is the center thickness of the fourth lens on the optical axis, and ET4 is the edge thickness of the fourth lens. By controlling the ratio of the center thickness to the edge thickness of the fourth lens within this range, it is beneficial to optimize the shape of the fourth lens, and is beneficial to actual processing and molding, and the optical power of the fourth lens can also be controlled. The fourth lens is combined with the third lens to form a double-glued structure, which is beneficial to balance and optimize the spherical aberration, chromatic aberration, etc. of the optical imaging lens, so that the optical imaging lens has good imaging performance. More specifically, CT4 and ET4 may satisfy: 2.25<CT4 / ET4<2.38.

[0061] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.8<SAG71 / SAG61<2.3, wherein SAG71 is the on-axis distance between the intersection of the object side surface of the seventh lens and the optical axis to the vertex of the effective radius of the object side surface of the seventh 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 vertex of the effective radius of the object side surface of the sixth lens. By controlling the ratio of the sagitta of the object side surface of the seventh lens and the sagitta of the object side surface of the sixth lens within this range, it is beneficial to control the lens shapes of the seventh lens and the sixth lens, and at the same time, it is beneficial to optimize the field curvature of the optical imaging lens, and it is also possible to control the sensitivity of the optical imaging lens to the spacing distance between the sixth lens and the seventh lens. More specifically, SAG71 and SAG61 may satisfy: 1.90<SAG71 / SAG61<2.13.

[0062] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.4<(CT6+CT7) / T67<1.8, wherein CT6 is the center thickness of the sixth lens on the optical axis, CT7 is the center thickness of the seventh lens on the optical axis, and T67 is the spacing distance between the sixth lens and the seventh lens on the optical axis. Satisfying 1.4<(CT6+CT7) / T67<1.8 can control the shapes of the sixth lens and the seventh lens, improve the optical power of the two lenses, and help optimize the sensitivity of the optical imaging lens to the spacing distance between the two lenses behind it. More specifically, CT6, CT7, and T67 may satisfy: 1.54<(CT6+CT7) / T67<1.64.

[0063] 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.

[0064] The optical imaging lens according to the above-mentioned embodiment of the present application may use multiple lenses, such as the seven lenses mentioned above. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between lenses, etc., the volume of the optical imaging lens can be effectively reduced, the sensitivity of the optical imaging lens can be reduced, and the processability of the optical 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, large image surface, low noise, and high imaging quality.

[0065] 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 seventh 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, the sixth lens and the seventh 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, the sixth lens and the seventh lens are all aspherical mirror surfaces.

[0066] 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 seven lenses are described as an example in the embodiments, the optical imaging lens is not limited to including seven lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0067] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0068] Example 1

[0069] 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.

[0070] like Figure 1As 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, a seventh lens E7 and a filter E8.

[0071] 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 negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The optical imaging lens has an imaging surface S17 , and light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0072] 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).

[0073]

[0074] Table 1

[0075] In Example 1, the total effective focal length f of the optical imaging lens is 6.52 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 is 8.22 mm, and the half diagonal length ImgH of the effective pixel area on the imaging surface S17 is 6.33 mm.

[0076] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 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:

[0077]

[0078] 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, 10 , A12 , A 14 , A 16 , A 18 and A 20 .

[0079]

[0080]

[0081] Table 2

[0082] 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.

[0083] Example 2

[0084] 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.

[0085] 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, a seventh lens E7 and a filter E8.

[0086] 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 negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The optical imaging lens has an imaging surface S17 , and light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0087] In Example 2, the total effective focal length f of the optical imaging lens is 6.52 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 is 8.22 mm, and the half diagonal length ImgH of the effective pixel area on the imaging surface S17 is 6.28 mm.

[0088] 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.

[0089]

[0090]

[0091] Table 3

[0092] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.3475E-03 6.7720E-03 -1.7787E-02 3.1476E-02 -3.7427E-02 3.0584E-02 -1.7510E-02 7.1151E-03 -2.0642E-03 S2 -2.4835E-02 2.5992E-02 -5.2195E-02 1.6616E-01 -3.4902E-01 4.6940E-01 -4.2603E-01 2.6957E-01 -1.2054E-01 S3 -3.7960E-02 5.2914E-02 -1.5751E-01 4.7607E-01 -9.5552E-01 1.2832E+00 -1.1944E+00 7.8724E-01 -3.7015E-01 S4 -1.1558E-02 -6.8959E-03 9.0887E-02 -3.0716E-01 6.7203E-01 -1.0231E+00 1.1082E+00 -8.6257E-01 4.8275E-01 S5 -3.2897E-02 7.2595E-02 -3.2654E-01 9.4374E-01 -1.8311E+00 2.4761E+00 -2.3931E+00 1.6744E+00 -8.4949E-01 S6 -1.7466E-02 3.8140E-02 -1.4012E-01 2.8520E-01 -3.7525E-01 3.3650E-01 -2.1097E-01 9.3485E-02 -2.9185E-02 S7 -1.5053E-02 2.5909E-02 -8.5989E-02 1.5535E-01 -1.7847E-01 1.3708E-01 -7.1576E-02 2.5442E-02 -6.0595E-03 S8 -5.6300E-03 -2.3105E-02 7.2312E-02 -1.4664E-01 1.9560E-01 -1.8101E-01 1.1945E-01 -5.6922E-02 1.9614E-02 S9 -2.0939E-02 -4.4417E-03 2.1806E-02 -2.7493E-02 1.7494E-02 -4.9051E-03 -1.1189E-03 1.6438E-03 -7.3793E-04 S10 -7.8870E-02 2.3431E-02 -1.7948E-03 -4.7242E-03 4.1208E-03 -1.9784E-03 6.1589E-04 -1.2673E-04 1.7107E-05 S11 -1.5469E-02 5.9181E-03 -3.1129E-03 -7.8463E-05 8.7307E-04 -5.2699E-04 1.7437E-04 -3.7146E-05 5.3452E-06 S12 2.6487E-02 -1.3428E-03 -6.7281E-03 4.0050E-03 -1.3372E-03 3.0141E-04 -4.8238E-05 5.5816E-06 -4.6857E-07 S13 -8.6454E-02 3.0276E-02 -9.3423E-03 2.3028E-03 -3.9934E-04 4.7963E-05 -4.0324E-06 2.3823E-07 -9.7547E-09 S14 -9.5796E-02 3.6073E-02 -1.1456E-02 2.7891E-03 -5.0650E-04 6.8261E-05 -6.8259E-06 5.0541E-07 -2.7505E-08

[0093] Table 4

[0094] 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. 4DIt can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0095] Example 3

[0096] 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.

[0097] 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, a seventh lens E7 and a filter E8.

[0098] 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 negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The optical imaging lens has an imaging surface S17 , and light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0099] In Example 3, the total effective focal length f of the optical imaging lens is 6.51 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 is 8.21 mm, and the half diagonal length ImgH of the effective pixel area on the imaging surface S17 is 6.20 mm.

[0100] 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.

[0101]

[0102] Table 5

[0103]

[0104]

[0105] Table 6

[0106] 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.

[0107] Example 4

[0108] 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.

[0109] 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, a seventh lens E7 and a filter E8.

[0110] 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 negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The optical imaging lens has an imaging surface S17 , and light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0111] In Example 4, the total effective focal length f of the optical imaging lens is 6.52 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 is 8.21 mm, and the half diagonal length ImgH of the effective pixel area on the imaging surface S17 is 6.17 mm.

[0112] 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.

[0113]

[0114]

[0115] Table 7

[0116] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.6826E-03 8.6413E-03 -2.3468E-02 4.2882E-02 -5.3521E-02 4.6996E-02 -2.9715E-02 1.3729E-02 -4.6581E-03 S2 -2.9280E-02 3.3252E-02 -5.9307E-02 1.7292E-01 -3.5678E-01 4.7847E-01 -4.3458E-01 2.7549E-01 -1.2347E-01 S3 -4.2109E-02 5.8429E-02 -1.5750E-01 4.6175E-01 -9.2132E-01 1.2351E+00 -1.1485E+00 7.5636E-01 -3.5540E-01 S4 -1.2637E-02 -6.4278E-03 9.1661E-02 -3.0885E-01 6.7523E-01 -1.0337E+00 1.1313E+00 -8.9246E-01 5.0710E-01 S5 -3.1037E-02 4.7841E-02 -1.9919E-01 5.5334E-01 -1.0478E+00 1.3935E+00 -1.3314E+00 9.2413E-01 -4.6618E-01 S6 -1.8934E-02 2.5668E-02 -8.8441E-02 1.8376E-01 -2.5486E-01 2.4502E-01 -1.6640E-01 8.0404E-02 -2.7479E-02 S7 -1.2356E-02 6.6201E-03 -1.9982E-02 2.9690E-02 -2.7765E-02 1.6970E-02 -6.5057E-03 1.3821E-03 -8.0002E-05 S8 -4.0060E-03 -3.1455E-02 9.8839E-02 -2.0037E-01 2.6844E-01 -2.4954E-01 1.6517E-01 -7.8800E-02 2.7136E-02 S9 -1.8042E-02 -1.9589E-02 5.9060E-02 -8.1819E-02 6.8994E-02 -3.8298E-02 1.4101E-02 -3.2955E-03 4.0418E-04 S10 -7.5464E-02 8.5474E-03 2.4664E-02 -3.3950E-02 2.5339E-02 -1.2485E-02 4.2492E-03 -1.0159E-03 1.7168E-04 S11 -1.4003E-02 5.3346E-03 -2.9519E-03 -5.5745E-04 1.3535E-03 -7.6114E-04 2.4193E-04 -4.9683E-05 6.8939E-06 S12 2.6069E-02 2.8239E-03 -1.1843E-02 6.9964E-03 -2.4002E-03 5.5348E-04 -9.0027E-05 1.0542E-05 -8.9331E-07 S13 -8.6322E-02 3.1393E-02 -1.1574E-02 3.5016E-03 -7.3499E-04 1.0685E-04 -1.1047E-05 8.2759E-07 -4.5213E-08 S14 -9.6974E-02 3.7939E-02 -1.2931E-02 3.3541E-03 -6.3726E-04 8.8488E-05 -9.0204E-06 6.7622E-07 -3.7106E-08

[0117] Table 8

[0118] Fig. 8A The 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.

[0119] Example 5

[0120] 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.

[0121] 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, a seventh lens E7 and a filter E8.

[0122] 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 negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The optical imaging lens has an imaging surface S17 , and light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0123] In Example 5, the total effective focal length f of the optical imaging lens is 6.52 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 is 8.20 mm, and the half diagonal length ImgH of the effective pixel area on the imaging surface S17 is 6.13 mm.

[0124] 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.

[0125]

[0126] Table 9

[0127] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.7859E-03 9.4858E-03 -2.6930E-02 5.0947E-02 -6.5356E-02 5.8590E-02 -3.7564E-02 1.7476E-02 -5.9282E-03 S2 -2.7711E-02 2.9030E-02 -5.0008E-02 1.5573E-01 -3.3287E-01 4.5417E-01 -4.1654E-01 2.6568E-01 -1.1958E-01 S3 -4.1212E-02 5.7736E-02 -1.6131E-01 4.7347E-01 -9.3803E-01 1.2479E+00 -1.1519E+00 7.5331E-01 -3.5159E-01 S4 -1.2866E-02 -7.7350E-04 5.7610E-02 -1.9046E-01 4.0794E-01 -6.2242E-01 6.8752E-01 -5.5131E-01 3.1946E-01 S5 -3.1491E-02 5.6674E-02 -2.3693E-01 6.4182E-01 -1.1717E+00 1.4938E+00 -1.3635E+00 9.0255E-01 -4.3386E-01 S6 -2.9252E-02 3.1580E-02 -9.5261E-02 1.8224E-01 -2.3108E-01 2.0229E-01 -1.2498E-01 5.4989E-02 -1.7160E-02 S7 -1.3515E-02 1.3696E-02 -4.8389E-02 8.5671E-02 -9.5317E-02 7.1059E-02 -3.6019E-02 1.2384E-02 -2.8306E-03 S8 -6.0521E-03 -2.1552E-02 6.4593E-02 -1.3155E-01 1.7815E-01 -1.6804E-01 1.1321E-01 -5.5100E-02 1.9391E-02 S9 -1.7640E-02 -7.5865E-03 2.2864E-02 -2.3975E-02 1.0290E-02 2.1828E-03 -5.5225E-03 3.5102E-03 -1.2925E-03 S10 -7.6500E-02 1.7976E-02 6.5881E-03 -1.2273E-02 8.3423E-03 -3.5224E-03 9.9061E-04 -1.8487E-04 2.1957E-05 S11 -1.5319E-02 2.8077E-03 2.2766E-03 -4.3473E-03 2.9346E-03 -1.2103E-03 3.3758E-04 -6.5626E-05 8.9626E-06 S12 2.6931E-02 -4.0197E-03 -2.8410E-03 1.5385E-03 -4.1895E-04 7.4630E-05 -8.8264E-06 6.2989E-07 -1.5332E-08 S13 -8.3224E-02 2.6811E-02 -7.1034E-03 1.4596E-03 -2.0173E-04 1.7192E-05 -7.0726E-07 -1.7259E-08 4.3253E-09 S14 -9.5177E-02 3.5187E-02 -1.0997E-02 2.6493E-03 -4.7841E-04 6.4300E-05 -6.4177E-06 4.7407E-07 -2.5711E-08

[0128] Table 10

[0129] 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.

[0130] Example 6

[0131] 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.

[0132] 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, a seventh lens E7 and a filter E8.

[0133] 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 negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The optical imaging lens has an imaging surface S17 , and light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0134] In Example 6, the total effective focal length f of the optical imaging lens is 6.52 mm, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 is 8.20 mm, and the half diagonal length ImgH of the effective pixel area on the imaging surface S17 is 6.06 mm.

[0135] 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.

[0136]

[0137] Table 11

[0138] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.1471E-03 5.5464E-03 -1.3257E-02 2.1049E-02 -2.1647E-02 1.4230E-02 -5.5945E-03 9.2154E-04 2.4065E-04 S2 -2.5505E-02 2.7293E-02 -5.4123E-02 1.6870E-01 -3.5131E-01 4.7046E-01 -4.2596E-01 2.6914E-01 -1.2025E-01 S3 -3.8359E-02 5.3183E-02 -1.5536E-01 4.6628E-01 -9.3283E-01 1.2498E+00 -1.1611E+00 7.6408E-01 -3.5880E-01 S4 -1.1331E-02 -9.3456E-03 1.0630E-01 -3.6803E-01 8.2585E-01 -1.2843E+00 1.4160E+00 -1.1192E+00 6.3508E-01 S5 -3.2720E-02 7.0615E-02 -3.1194E-01 8.8413E-01 -1.6837E+00 2.2377E+00 -2.1287E+00 1.4680E+00 -7.3508E-01 S6 -2.1841E-02 3.6814E-02 -1.2181E-01 2.3749E-01 -3.0307E-01 2.6500E-01 -1.6247E-01 7.0555E-02 -2.1629E-02 S7 -1.4054E-02 1.9902E-02 -6.7177E-02 1.1956E-01 -1.3508E-01 1.0226E-01 -5.2632E-02 1.8422E-02 -4.3136E-03 S8 -5.3923E-03 -2.2344E-02 6.6443E-02 -1.3130E-01 1.7221E-01 -1.5753E-01 1.0311E-01 -4.8846E-02 1.6760E-02 S9 -2.0725E-02 -2.8699E-03 1.6020E-02 -1.7477E-02 6.9880E-03 2.4645E-03 -4.7458E-03 2.9267E-03 -1.0669E-03 S10 -7.8782E-02 2.2923E-02 -2.1283E-03 -3.3492E-03 2.6439E-03 -1.0765E-03 2.5629E-04 -2.8232E-05 -1.7828E-06 S11 -1.5230E-02 5.0159E-03 -2.1044E-03 -7.1267E-04 1.1276E-03 -5.9735E-04 1.8833E-04 -3.9173E-05 5.5611E-06 S12 2.6330E-02 -1.4793E-03 -6.3903E-03 3.7772E-03 -1.2537E-03 2.8184E-04 -4.5087E-05 5.2227E-06 -4.3933E-07 S13 -8.7197E-02 3.0466E-02 -9.3159E-03 2.2806E-03 -3.9400E-04 4.7199E-05 -3.9571E-06 2.3282E-07 -9.4689E-09 S14 -9.6291E-02 3.6088E-02 -1.1413E-02 2.7738E-03 -5.0419E-04 6.8188E-05 -6.8569E-06 5.1140E-07 -2.8067E-08

[0139] Table 12

[0140] 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.

[0141] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0142] Conditional formula\Example 1 2 3 4 5 6 ImgH×EPD / f(mm) 3.93 3.90 3.85 3.83 3.81 3.76 F×tan(FOV / 2)(mm) 6.20 6.14 6.05 6.03 6.00 5.92 f / EPD 1.61 1.61 1.61 1.61 1.61 1.61 FOV(°) 87.1 86.6 85.8 85.5 85.2 84.5 (f2+f5) / f3 1.35 1.35 1.35 1.25 1.37 1.38 f4 / (f1+f6) 1.31 1.32 1.33 1.36 1.35 1.35 (R14-R13) / f7 1.94 2.13 2.12 1.86 1.77 1.92 (R2+R1) / (R2-R1) 1.65 1.66 1.67 1.66 1.68 1.66 TTL / ImgH 1.30 1.31 1.32 1.33 1.34 1.35 f12 / (CT1+CT2) 5.98 5.93 5.97 5.99 5.98 5.94 CT4 / ET4 2.31 2.35 2.33 2.29 2.27 2.33 SAG71 / SAG61 1.92 1.94 2.01 2.10 1.98 1.95 (CT6+CT7) / T67 1.56 1.55 1.57 1.61 1.62 1.57

[0143] Table 13

[0144] 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.

[0145] 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 a negative optical power, and its object side surface is convex and its image side surface is concave; a fourth lens element having positive refractive power, whose object-side surface is convex and whose image-side surface is convex; a fifth lens having negative optical power, whose object-side surface is concave and whose image-side surface is concave; a sixth lens element having positive refractive power, whose object-side surface is convex and whose image-side surface is concave; and The seventh lens element has a negative optical power, and its object side surface is convex and its image side surface is concave; The number of lenses having optical power in the optical imaging lens is seven; The curvature radius R14 of the image side surface of the seventh lens, the curvature radius R13 of the object side surface of the seventh lens, and the effective focal length f7 of the seventh lens satisfy: 1.75<(R14-R13) / f7<2.15; The effective focal length f2 of the second lens, the effective focal length f5 of the fifth lens and the effective focal length f3 of the third lens satisfy: 1.23<(f2+f5) / f3<1.

40.

2. The optical imaging lens according to claim 1, wherein: The total effective focal length f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens satisfy: 5.90mm<f×tan(FOV / 2)<6.25mm.

3. The optical imaging lens according to claim 1, wherein: The total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1.61≤f / EPD<1.

63.

4. The optical imaging lens according to claim 1, wherein: The maximum field of view FOV of the optical imaging lens satisfies: 84.5°≤FOV≤87.1°.

5. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens, the effective focal length f1 of the first lens and the effective focal length f6 of the sixth lens satisfy: 1.30<f4 / (f1+f6)<1.

40.

6. The optical imaging lens according to claim 5, characterized in that: Half of the diagonal length of the effective pixel area on the imaging surface ImgH, the entrance pupil diameter EPD of the optical imaging lens, and the total effective focal length f of the optical imaging lens satisfy: 3.75mm<ImgH×EPD / f≤3.93mm.

7. The optical imaging lens according to claim 1, wherein: The curvature radius R2 of the image-side surface of the first lens and the curvature radius R1 of the object-side surface of the first lens satisfy: 1.63<(R2+R1) / (R2-R1)<1.

70.

8. The optical imaging lens according to claim 1, wherein: The axial distance TTL from the object side of the first lens to the imaging surface and half the diagonal length of the effective pixel area on the imaging surface ImgH satisfy: 1.29<TTL / ImgH<1.

36.

9. The optical imaging lens according to claim 1, wherein: The combined focal length f12 of the first lens and the second lens, the center thickness CT1 of the first lens on the optical axis, and the center thickness CT2 of the second lens on the optical axis satisfy: 5.90<f12 / (CT1+CT2)<6.

00.

10. The optical imaging lens according to claim 1, wherein: The center thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 2.25<CT4 / ET4<2.

38.

11. The optical imaging lens according to any one of claims 1 to 10, characterized in that: An axial distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis to the effective radius vertex of the object side surface of the seventh 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: 1.90<SAG71 / SAG61<2.

13.

12. The optical imaging lens according to any one of claims 1 to 10, characterized in that: The center thickness CT6 of the sixth lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, and the distance T67 between the sixth lens and the seventh lens on the optical axis satisfy: 1.54<(CT6+CT7) / T67<1.64.

Images