Optical imaging lens

Abstract

The present application relates to an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with optical power; a second lens with negative optical power; a third lens with optical power; a fourth lens with negative optical power; a fifth lens with optical power; and a sixth lens with negative optical power, wherein the object side surface is convex and the image side surface is concave. The optical imaging lens can satisfy f / EPD<1.9; TTL / ImgH<1.3; and 2.0<|R7 / f|<5.0, wherein f is the total effective focal length of the optical imaging lens, EPD is the entrance pupil diameter of the optical imaging lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, ImgH is half of the diagonal length of the effective pixel area on the imaging surface, and R7 is the radius of curvature of the object side surface of the fourth lens.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and in particular, to an optical imaging lens comprising six lenses. Background Art

[0002] In recent years, with the rapid development of electronic products, the application of cameras on electronic products has become more and more extensive. At the same time, with the trend of electronic products towards thinness, the optical camera lenses mounted on them need to not only ensure good imaging quality, but also have a thin size. The photosensitive device of the optical lens is usually a charge coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS Sensor). Due to the continuous improvement of semiconductor manufacturing process technology, the pixel size of the photosensitive device continues to shrink. In addition, today's electronic products are developing in a trend of good functionality and thin size. Therefore, miniaturized optical lenses with good imaging quality are increasingly favored by manufacturers and consumers.

[0003] In order to meet the requirements of high pixels and wide field of view, conventional optical lenses all use large apertures and multiple lenses. However, such a setting will directly affect the size of the lens, making it difficult to meet the needs of miniaturization. In addition, in order to increase the field of view of the lens, it often leads to increased lens distortion and too large an angle of the main light, resulting in insufficient resolution of the lens. Summary of the invention

[0004] On the one hand, the present application provides such an optical imaging lens, which may include, in order from the object side to the image side along the optical axis: a first lens with optical power; a second lens with negative optical power; a third lens with optical power; a fourth lens with negative optical power; a fifth lens with optical power; and a sixth lens with negative optical power, whose object side surface is convex and whose image side surface is concave. The optical imaging lens may satisfy f / EPD<1.9; TTL / ImgH<1.3; and 2.0<|R7 / f|<5.0, wherein f is the total effective focal length of the optical imaging lens, EPD is the entrance pupil diameter of the optical imaging lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, ImgH is half of the diagonal length of the effective pixel area on the imaging surface, and R7 is the radius of curvature of the object side surface of the fourth lens.

[0005] In some embodiments, the optical imaging lens may satisfy 1.8 < (R11 + R12) / (R11 - R12) < 2.5, where R11 is the radius of curvature of the object side surface of the sixth lens, and R12 is the radius of curvature of the image side surface of the sixth lens.

[0006] In some embodiments, the optical imaging lens may satisfy 2.8 < (CT1 + CT2 + CT3) / (T12 + T23) < 3.8, where CT1 is the central thickness of the first lens along the optical axis, CT2 is the central thickness of the second lens along the optical axis, CT3 is the central thickness of the third lens along the optical axis, T12 is the distance between the first lens and the second lens along the optical axis, and T23 is the distance between the second lens and the third lens along the optical axis.

[0007] In some embodiments, the maximum value ETmax of the edge thicknesses of the first lens to the sixth lens may satisfy: ETmax < 0.5 mm.

[0008] In some embodiments, the optical imaging lens may satisfy 1.1 < SAG52 / SAG51 < 1.9, where SAG51 is the distance from the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens in the direction of the optical axis, and SAG52 is the distance from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens in the direction of the optical axis.

[0009] In some embodiments, the optical imaging lens may satisfy 2.0 < |CT3 / SAG32| < 3.0, where CT3 is the central thickness of the third lens along the optical axis, and SAG32 is the distance from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens in the direction of the optical axis.

[0010] In some embodiments, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy: -2.7 < f2 / f1 < -2.2.

[0011] In some embodiments, the combined focal length f123 of the first lens, the second lens, and the third lens and the total effective focal length f of the optical imaging lens may satisfy: 1.30 < f123 / f < 1.55.

[0012] In some embodiments, the optical imaging lens may satisfy 3.5 < |R2 / f1| + |R3 / f2| < 5.7, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, R2 is the radius of curvature of the image side surface of the first lens, and R3 is the radius of curvature of the object side surface of the second lens.

[0013] In some embodiments, the optical imaging lens may satisfy 2.2 < (CT1 + CT3) / (T12 + T23) < 3.0, where CT1 is the central thickness of the first lens along the optical axis, CT3 is the central thickness of the third lens along the optical axis, T12 is the distance between the first lens and the second lens along the optical axis, and T23 is the distance between the second lens and the third lens along the optical axis.

[0014] In some embodiments, the optical imaging lens may satisfy 1.3 < f5×tan(Semi - FOV) / R9 < 1.7, where f5 is the effective focal length of the fifth lens, R9 is the curvature radius of the object side surface of the fifth lens, and Semi - FOV is the maximum semi - field - of - view angle of the optical imaging lens.

[0015] In some embodiments, the total effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens may satisfy: 1.0 < f12 / f < 1.3.

[0016] On the other hand, the present application provides an optical imaging lens which may sequentially include, along the optical axis from the object side to the image side: a first lens having a focal power; a second lens having a negative focal power; a third lens having a focal power; a fourth lens having a negative focal power; a fifth lens having a focal power; and a sixth lens having a focal power, the object side surface of which is convex and the image side surface of which is concave. The optical imaging lens may satisfy: f / EPD < 1.9; TTL / ImgH < 1.3; and 1.0 < T56 / CT5 < 2.0, where f is the total effective focal length of the optical imaging lens, EPD is the entrance pupil diameter of the optical imaging lens, TTL is the distance along the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, ImgH is half of the diagonal length of the effective pixel region on the imaging surface, T56 is the distance between the fifth lens and the sixth lens along the optical axis, and CT5 is the central thickness of the fifth lens along the optical axis.

[0017] In some embodiments, the optical imaging lens may satisfy 1.8 < (R11 + R12) / (R11 - R12) < 2.5, where R11 is the curvature radius of the object side surface of the sixth lens and R12 is the curvature radius of the image side surface of the sixth lens.

[0018] In some embodiments, the optical imaging lens may satisfy 2.8 < (CT1 + CT2 + CT3) / (T12 + T23) < 3.8, where CT1 is the central thickness of the first lens along the optical axis, CT2 is the central thickness of the second lens along the optical axis, CT3 is the central thickness of the third lens along the optical axis, T12 is the distance between the first lens and the second lens along the optical axis, and T23 is the distance between the second lens and the third lens along the optical axis.

[0019] In some embodiments, the maximum value ETmax of the edge thicknesses of the first lens to the sixth lens may satisfy: ETmax < 0.5 mm.

[0020] In some embodiments, the optical imaging lens may satisfy 1.1 < SAG52 / SAG51 < 1.9, where SAG51 is the distance from the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens in the direction of the optical axis, and SAG52 is the distance from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens in the direction of the optical axis.

[0021] In some embodiments, the optical imaging lens may satisfy 2.0 < |CT3 / SAG32| < 3.0, where CT3 is the central thickness of the third lens along the optical axis, and SAG32 is the distance from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens in the direction of the optical axis.

[0022] In some embodiments, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy: -2.7 < f2 / f1 < -2.2.

[0023] In some embodiments, the combined focal length f123 of the first lens, the second lens, and the third lens and the total effective focal length f of the optical imaging lens may satisfy: 1.30 < f123 / f < 1.55.

[0024] In some embodiments, the optical imaging lens may satisfy 3.5 < |R2 / f1| + |R3 / f2| < 5.7, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, R2 is the radius of curvature of the image side surface of the first lens, and R3 is the radius of curvature of the object side surface of the second lens.

[0025] In some embodiments, the optical imaging lens may satisfy 2.2 < (CT1 + CT3) / (T12 + T23) < 3.0, where CT1 is the central thickness of the first lens along the optical axis, CT3 is the central thickness of the third lens along the optical axis, T12 is the distance between the first lens and the second lens along the optical axis, and T23 is the distance between the second lens and the third lens along the optical axis.

[0026] In some embodiments, the optical imaging lens may satisfy 1.3 < f5×tan(Semi-FOV) / R9 < 1.7, where f5 is the effective focal length of the fifth lens, R9 is the radius of curvature of the object side surface of the fifth lens, and Semi-FOV is the maximum semi-field angle of the optical imaging lens.

[0027] In some embodiments, the total effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens may satisfy: 1.0 <f12 / f<1.3。

[0028] According to the above implementation manner and the optical imaging lens described in each embodiment of the specific implementation manner, at least one of ultra-thinness, large aperture, and high resolution can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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:

[0030] Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0031] 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;

[0032] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0033] 4A to 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;

[0034] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0035] 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;

[0037] 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;

[0039] 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;

[0040] Fig.11A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown;

[0041] 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

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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 subject is called the object side of the lens, and the surface of each lens closest to the imaging side is called the image side of the lens.

[0046] 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.

[0047] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0048] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The following will describe this application in detail with reference to the drawings and in combination with the embodiments.

[0049] The features, principles, and other aspects of this application will be described in detail below.

[0050] The optical imaging lens according to an exemplary embodiment of this application may include six lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens to the sixth lens are arranged in sequence from the object side to the image side along the optical axis of the optical imaging lens, and there may be a spacing distance between any two adjacent lenses.

[0051] In the exemplary embodiment, the first lens may have optical power; the second lens may have negative optical power; the third lens may have optical power; the fourth lens may have negative optical power; the fifth lens may have optical power; and the sixth lens may have optical power, with its object side being convex and its image side being concave.

[0052] In the exemplary embodiment, the first lens may have positive optical power, with its object side being convex and its image side being concave.

[0053] In the exemplary embodiment, at least one of the object side and the image side of the third lens may be convex.

[0054] In the exemplary embodiment, at least one of the object side and the image side of the fourth lens may be concave.

[0055] In the exemplary embodiment, the sixth lens may have negative optical power.

[0056] In the exemplary embodiment, the optical imaging lens according to this application may satisfy: f / EPD < 1.9, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. More specifically, f and EPD may further satisfy: 1.7 < f / EPD < 1.9. Satisfying f / EPD < 1.9 can effectively increase the light transmission amount of the lens per unit time, giving it a higher illuminance, thereby improving the imaging quality of the lens in a darker environment and achieving the purpose of improving its practicality.

[0057] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: TTL / ImgH < 1.3, where TTL is the distance along the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens. More specifically, TTL and ImgH may further satisfy: 1.0 < TTL / ImgH < 1.3. Satisfying TTL / ImgH < 1.3 can simultaneously achieve a larger image height and a shorter overall optical length, which is beneficial to realizing lens miniaturization and improving imaging quality.

[0058] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.0 < |R7 / f| < 5.0, where R7 is the radius of curvature of the object side surface of the fourth lens, and f is the total effective focal length of the optical imaging lens. Satisfying 2.0 < |R7 / f| < 5.0 can reasonably distribute the optical power of the lens, which is not only beneficial to making the fourth lens have good processability, but also beneficial to correcting the aberration of the lens and reducing the size of the lens.

[0059] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy 1.0 < T56 / CT5 < 2.0, where T56 is the distance along the optical axis between the fifth lens and the sixth lens, and CT5 is the central thickness of the fifth lens along the optical axis. More specifically, T56 and CT5 may further satisfy: 1.2 < T56 / CT5 < 1.8. Satisfying 1.0 < T56 / CT5 < 2.0 is beneficial to realizing lens miniaturization and reducing the risk of ghost images.

[0060] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.8 < (R11 + R12) / (R11 - R12) < 2.5, where R11 is the radius of curvature of the object side surface of the sixth lens, and R12 is the radius of curvature of the image side surface of the sixth lens. Satisfying 1.8 < (R11 + R12) / (R11 - R12) < 2.5 is beneficial to increasing the optical power of the sixth lens so that it can converge light better, which is not only beneficial to improving the imaging quality of the system, but also beneficial to improving the relative illumination of the system.

[0061] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.8 < (CT1 + CT2 + CT3) / (T12 + T23) < 3.8, where CT1 is the central thickness of the first lens along the optical axis, CT2 is the central thickness of the second lens along the optical axis, CT3 is the central thickness of the third lens along the optical axis, T12 is the distance along the optical axis between the first lens and the second lens, and T23 is the distance along the optical axis between the second lens and the third lens T23. Satisfying 2.8 < (CT1 + CT2 + CT3) / (T12 + T23) < 3.8 is beneficial to improving the convenience of lens processing and assembly.

[0062] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: ETmax < 0.5 mm, where ETmax is the maximum value among the edge thicknesses of the first lens to the sixth lens. More specifically, ETmax may further satisfy: 0.3 mm < ETmax < 0.5 mm. Satisfying ETmax < 0.5 mm is beneficial for the processing and molding of the lens and improves the assembly stability of the lens.

[0063] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.1 < SAG52 / SAG51 < 1.9, where SAG51 is the distance from the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens in the direction of the optical axis, and SAG52 is the distance from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens in the direction of the optical axis. Satisfying 1.1 < SAG52 / SAG51 < 1.9 is beneficial for the processing and molding of the fifth lens and improves the assembly stability of the lens.

[0064] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.0 < |CT3 / SAG32| < 3.0, where CT3 is the central thickness of the third lens along the optical axis, and SAG32 is the distance from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens in the direction of the optical axis. Satisfying 2.0 < |CT3 / SAG32| < 3.0 helps to avoid process problems such as difficult lens processing caused by excessive SAG32.

[0065] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -2.7 < f2 / f1 < -2.2, where f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens. Satisfying -2.7 < f2 / f1 < -2.2 is beneficial for compensating the aberration of the lens, thereby improving the overall resolution of the system.

[0066] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.30 < f123 / f < 1.55, where f123 is the combined focal length of the first lens, the second lens, and the third lens, and f is the total effective focal length of the optical imaging lens. Satisfying 1.30 < f123 / f < 1.55 can avoid excessive concentration of optical power and is beneficial for correcting the aberration of the system. At the same time, reasonably controlling the combined optical power of the first three lenses can also effectively reduce the size of the lens.

[0067] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 3.5 < |R2 / f1| + |R3 / f2| < 5.7, where R2 is the radius of curvature of the image side of the first lens, R3 is the radius of curvature of the object side of the second lens, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens. Satisfying 3.5 < |R2 / f1| + |R3 / f2| < 5.7 is beneficial to improving the field curvature and distortion of the lens, thereby achieving the purpose of compensating for the aberration of the lens and improving the resolution of the system. At the same time, reasonably controlling the range of |R2 / f1| + |R3 / f2| is also beneficial to reducing the processing difficulty of the first lens and the second lens. In some embodiments, the image side of the first lens may be concave, and the object side of the second lens may be convex.

[0068] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.2 < (CT1 + CT3) / (T12 + T23) < 3.0, where CT1 is the central thickness of the first lens along the optical axis, CT3 is the central thickness of the third lens along the optical axis, T12 is the spacing distance between the first lens and the second lens along the optical axis, and T23 is the spacing distance between the second lens and the third lens along the optical axis. Satisfying 2.2 < (CT1 + CT3) / (T12 + T23) < 3.0 is beneficial to improving the convenience of lens processing and assembly.

[0069] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.3 < f5 × tan(Semi-FOV) / R9 < 1.7, where f5 is the effective focal length of the fifth lens, Semi-FOV is the maximum half field of view angle of the optical imaging lens, and R9 is the radius of curvature of the object side of the fifth lens. Satisfying 1.3 < f5 × tan(Semi-FOV) / R9 < 1.7 is beneficial to the processing and shaping of the fifth lens and is beneficial to compensating for the aberration of the lens. In some embodiments, the object side of the fifth lens may be convex.

[0070] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.0 < f12 / f < 1.3, where f12 is the combined focal length of the first lens and the second lens, and f is the total effective focal length of the optical imaging lens. Satisfying 1.0 < f12 / f < 1.3 is beneficial to balancing the aberration of the lens, thereby improving the resolution of the system.

[0071] In an exemplary embodiment, the optical imaging lens according to the present application may further include a diaphragm disposed in front of the first lens. Optionally, the above optical imaging lens further includes a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0072] The optical imaging lens according to the above-mentioned embodiment of the present application may use multiple lenses, such as the six lenses described above. By reasonably allocating the focal length, surface shape, center thickness of each lens, and the on-axis spacing between each lens, the volume of the optical imaging lens can be effectively reduced and the processability of the optical imaging lens can be improved, making the optical imaging lens more conducive to production and processing and applicable to portable electronic products. The optical imaging lens configured as above can have characteristics such as ultra-thinness, large aperture, and good imaging quality.

[0073] In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical lens, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the sixth lens is an aspherical lens. 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, that is, improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side 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 and image side 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.

[0074] 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.

[0075] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0076] Example 1

[0077] 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.

[0078] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0079] 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 concave, 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 light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0080] Table 1 shows 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).

[0081]

[0082] Table 1

[0083] In this example, the total effective focal length f of the optical imaging lens is 5.22 mm, the total length TTL of the optical imaging lens (i.e., the distance along the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) is 5.95 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76 mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field of view Semi-FOV of the optical imaging lens is 41.50°.

[0084] 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 the aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0085]

[0086] 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. Tables 2 and 3 give the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspheric mirror surface S1-S12 in Example 1.

[0087]

[0088]

[0089] Table 2

[0090] Face number A18 A20 A22 A24 A26 A28 A30 S1 3.4048E+01 -2.5462E+01 1.3613E+01 -5.0721E+00 1.2506E+00 -1.8333E-01 1.2096E-02 S2 -3.6845E+01 2.7072E+01 -1.4322E+01 5.3084E+00 -1.3068E+00 1.9179E-01 -1.2691E-02 S3 7.7747E+01 -7.4712E+01 5.1355E+01 -2.4579E+01 7.7689E+00 -1.4557E+00 1.2229E-01 S4 1.5076E+03 -1.7470E+03 1.4524E+03 -8.4438E+02 3.2594E+02 -7.5060E+01 7.8073E+00 S5 1.8292E+02 -1.8435E+02 1.2406E+02 -5.2270E+01 1.1621E+01 -5.4439E-01 -1.7722E-01 S6 2.0145E+01 -1.9023E+01 1.2734E+01 -5.9044E+00 1.8063E+00 -3.2868E-01 2.7023E-02 S7 -5.9890E+01 4.4025E+01 -2.3293E+01 8.6344E+00 -2.1271E+00 3.1259E-01 -2.0722E-02 S8 -1.2292E+00 6.4636E-01 -2.4412E-01 6.4380E-02 -1.1232E-02 1.1631E-03 -5.4058E-05 S9 -1.6827E-04 1.3452E-04 -3.8412E-05 6.0781E-06 -5.6211E-07 2.8519E-08 -6.1476E-10 S10 1.0929E-03 -2.2610E-04 3.2987E-05 -3.3329E-06 2.2247E-07 -8.8398E-09 1.5854E-10 S11 -7.3860E-08 4.8205E-07 -6.1039E-08 4.1499E-09 -1.6960E-10 3.9365E-12 -4.0113E-14 S12 1.4100E-04 -1.4556E-05 1.0854E-06 -5.6773E-08 1.9735E-09 -4.0903E-11 3.8221E-13

[0091] Table 3

[0092] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind 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.

[0093] Example 2

[0094] 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.

[0095] like Figure 3 As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[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 negative 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 light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0097] In this example, the total effective focal length f of the optical imaging lens is 5.01 mm, the total length TTL of the optical imaging lens is 5.76 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76 mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field of view Semi-FOV of the optical imaging lens is 42.65°.

[0098] Table 4 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). Tables 5 and 6 show the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror surface S1-S12 in Example 2, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0099]

[0100] Table 4

[0101] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.5689E-02 1.7075E-01 -1.0780E+00 4.6667E+00 -1.4426E+01 3.2537E+01 -5.3949E+01 S2 -3.0431E-02 1.2119E-01 -6.8206E-01 2.5269E+00 -5.8097E+00 8.0981E+00 -5.6663E+00 S3 -2.2965E-02 8.3784E-02 -8.5302E-01 6.4721E+00 -2.9623E+01 8.9641E+01 -1.8863E+02 S4 2.2988E-02 -5.1980E-01 7.0133E+00 -5.4823E+01 2.8244E+02 -1.0046E+03 2.5348E+03 S5 2.4540E-02 -1.2802E+00 1.2131E+01 -7.3684E+01 3.0488E+02 -8.9292E+02 1.8915E+03 S6 -3.8148E-02 -4.7713E-01 4.7849E+00 -2.7844E+01 1.0605E+02 -2.7856E+02 5.1863E+02 S7 -1.2028E-01 -1.6280E-01 1.5142E+00 -6.0218E+00 1.5543E+01 -2.8112E+01 3.6844E+01 S8 -1.4318E-01 -6.9027E-03 3.7386E-01 -1.1521E+00 2.1559E+00 -2.7548E+00 2.5076E+00 S9 -4.2911E-02 1.3842E-02 4.6154E-03 -4.8138E-02 7.5593E-02 -6.5050E-02 3.5979E-02 S10 8.7680E-03 9.7557E-04 2.3493E-02 -5.6995E-02 6.1310E-02 -4.0107E-02 1.7534E-02 S11 -2.6440E-01 1.7110E-01 -8.9547E-02 3.9440E-02 -1.3561E-02 3.5130E-03 -6.7905E-04 S12 -3.0114E-01 2.2159E-01 -1.3637E-01 6.3781E-02 -2.2033E-02 5.5997E-03 -1.0499E-03

[0102] Table 5

[0103] Face number A18 A20 A22 A24 A26 A28 A30 S1 6.5733E+01 -5.8426E+01 3.7286E+01 -1.6590E+01 4.8753E+00 -8.4924E-01 6.6329E-02 S2 -1.0717E+00 6.4665E+00 -6.6254E+00 3.6220E+00 -1.1391E+00 1.9039E-01 -1.2592E-02 S3 2.8282E+02 -3.0434E+02 2.3331E+02 -1.2433E+02 4.3742E+01 -9.1313E+00 8.5615E-01 S4 -4.6012E+03 6.0246E+03 -5.6362E+03 3.6726E+03 -1.5827E+03 4.0534E+02 -4.6702E+01 S5 -2.9268E+03 3.3066E+03 -2.6953E+03 1.5424E+03 -5.8747E+02 1.3368E+02 -1.3744E+01 S6 -6.9407E+02 6.6939E+02 -4.6087E+02 2.2082E+02 -6.9913E+01 1.3143E+01 -1.1103E+00 S7 -3.5589E+01 2.5438E+01 -1.3328E+01 4.9836E+00 -1.2597E+00 1.9275E-01 -1.3462E-02 S8 -1.6566E+00 7.9742E-01 -2.7685E-01 6.7427E-02 -1.0906E-02 1.0495E-03 -4.5363E-05 S9 -1.3538E-02 3.5412E-03 -6.4424E-04 7.9957E-05 -6.4571E-06 3.0592E-07 -6.4537E-09 S10 -5.3304E-03 1.1439E-03 -1.7283E-04 1.7999E-05 -1.2304E-06 4.9691E-08 -8.9866E-10 S11 9.7426E-05 -1.0282E-05 7.8471E-07 -4.2018E-08 1.4945E-09 -3.1672E-11 3.0241E-13 S12 1.4527E-04 -1.4748E-05 1.0820E-06 -5.5717E-08 1.9066E-09 -3.8880E-11 3.5714E-13

[0104] Table 6

[0105] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind 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. 4A to 4D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0106] Example 3

[0107] 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.

[0108] like Figure 5 As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0109] 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 concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is concave, 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 light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0110] In this example, the total effective focal length f of the optical imaging lens is 5.14 mm, the total length TTL of the optical imaging lens is 5.95 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76 mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field of view Semi-FOV of the optical imaging lens is 41.98°.

[0111] Table 7 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). Tables 8 and 9 show the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror surface S1-S12 in Example 3, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0112]

[0113] Table 7

[0114]

[0115]

[0116] Table 8

[0117] Face number A18 A20 A22 A24 A26 A28 A30 S1 3.5314E+01 -2.5308E+01 1.3036E+01 -4.7043E+00 1.1293E+00 -1.6209E-01 1.0531E-02 S2 -1.1914E+01 1.3405E+01 -9.5361E+00 4.3689E+00 -1.2430E+00 1.9749E-01 -1.3096E-02 S3 2.2201E+02 -2.3977E+02 1.8264E+02 -9.5945E+01 3.3079E+01 -6.7361E+00 6.1406E-01 S4 7.0955E+02 -9.3278E+02 8.9250E+02 -6.0222E+02 2.7082E+02 -7.2677E+01 8.7891E+00 S5 3.0671E+01 -4.4155E+01 4.5129E+01 -3.1840E+01 1.4676E+01 -3.9623E+00 4.7415E-01 S6 2.4113E+01 -2.2727E+01 1.5301E+01 -7.1634E+00 2.2134E+00 -4.0573E-01 3.3436E-02 S7 -2.9907E+01 2.2426E+01 -1.2069E+01 4.5391E+00 -1.1315E+00 1.6780E-01 -1.1189E-02 S8 -1.8474E-01 1.0720E-01 -4.4300E-02 1.2677E-02 -2.3775E-03 2.6203E-04 -1.2838E-05 S9 -1.7348E-02 4.4105E-03 -7.8758E-04 9.6534E-05 -7.7310E-06 3.6436E-07 -7.6664E-09 S10 -3.7737E-03 7.9235E-04 -1.1731E-04 1.1978E-05 -8.0282E-07 3.1790E-08 -5.6359E-10 S11 6.3926E-05 -6.9337E-06 5.4778E-07 -3.0453E-08 1.1253E-09 -2.4763E-11 2.4527E-13 S12 1.1225E-04 -1.1235E-05 8.1333E-07 -4.1351E-08 1.3982E-09 -2.8197E-11 2.5636E-13

[0118] Table 9

[0119] Fig. 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates that light of different wavelengths deviates from the focal point behind 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.

[0120] Example 4

[0121] 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.

[0122] like Figure 7 As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0123] 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 concave, and its image side surface S8 is convex. 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 light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0124] In this example, the total effective focal length f of the optical imaging lens is 5.18 mm, the total length TTL of the optical imaging lens is 6.01 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76 mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field of view Semi-FOV of the optical imaging lens is 41.54°.

[0125] Table 10 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). Tables 11 and 12 show the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror surface S1-S12 in Example 4, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0126]

[0127] Table 10

[0128] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.4876E-03 4.7911E-02 -3.0783E-01 1.2917E+00 -3.6753E+00 7.3278E+00 -1.0463E+01 S2 -1.7478E-02 1.2927E-03 6.4969E-02 -2.8171E-01 7.7783E-01 -1.3403E+00 1.1254E+00 S3 -2.5955E-02 1.0762E-01 -9.1489E-01 6.3352E+00 -2.8065E+01 8.3670E+01 -1.7418E+02 S4 -5.0166E-03 1.5174E-02 2.7408E-01 -2.4061E+00 1.1808E+01 -3.5935E+01 6.8875E+01 S5 -6.8994E-02 2.3489E-01 -1.9330E+00 1.0359E+01 -3.7751E+01 9.5262E+01 -1.6860E+02 S6 -1.0119E-01 4.4202E-01 -2.9193E+00 1.3171E+01 -4.1552E+01 9.3530E+01 -1.5274E+02 S7 -1.4683E-01 2.7687E-01 -1.2384E+00 4.6094E+00 -1.2342E+01 2.3690E+01 -3.3006E+01 S8 -1.4246E-01 9.8012E-02 -1.1998E-01 1.8972E-01 -2.6325E-01 2.7891E-01 -2.0953E-01 S9 -3.6902E-02 3.7878E-04 2.4091E-02 -5.8344E-02 7.1696E-02 -5.5103E-02 2.8318E-02 S10 1.1897E-02 8.6382E-05 7.8640E-03 -2.2649E-02 2.4738E-02 -1.5953E-02 6.7794E-03 S11 -2.6120E-01 1.5792E-01 -7.5067E-02 2.9900E-02 -9.5873E-03 2.4008E-03 -4.6117E-04 S12 -2.9270E-01 2.0662E-01 -1.2172E-01 5.5016E-02 -1.8497E-02 4.5898E-03 -8.4098E-04

[0129] Table 11

[0130] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.0825E+01 -8.1287E+00 4.3862E+00 -1.6574E+00 4.1642E-01 -6.2493E-02 4.2402E-03 S2 4.3621E-01 -2.3603E+00 2.9736E+00 -2.0641E+00 8.5086E-01 -1.9575E-01 1.9438E-02 S3 2.5815E+02 -2.7399E+02 2.0668E+02 -1.0815E+02 3.7307E+01 -7.6282E+00 7.0008E-01 S4 -7.8346E+01 3.6479E+01 2.9639E+01 -6.0928E+01 4.3885E+01 -1.5621E+01 2.2858E+00 S5 2.0913E+02 -1.7837E+02 9.9311E+01 -3.1347E+01 2.6268E+00 1.4274E+00 -3.4526E-01 S6 1.8242E+02 -1.5913E+02 1.0013E+02 -4.4208E+01 1.2984E+01 -2.2765E+00 1.8021E-01 S7 3.3617E+01 -2.5000E+01 1.3415E+01 -5.0561E+00 1.2695E+00 -1.9068E-01 1.2964E-02 S8 1.0483E-01 -3.0263E-02 1.9125E-03 1.9746E-03 -7.5861E-04 1.1852E-04 -7.2052E-06 S9 -1.0040E-02 2.4854E-03 -4.2806E-04 5.0216E-05 -3.8240E-06 1.7038E-07 -3.3715E-09 S10 -1.9840E-03 4.0686E-04 -5.8434E-05 5.7631E-06 -3.7213E-07 1.4176E-08 -2.4161E-10 S11 6.6904E-05 -7.2039E-06 5.6300E-07 -3.0891E-08 1.1250E-09 -2.4379E-11 2.3766E-13 S12 1.1373E-04 -1.1284E-05 8.0923E-07 -4.0738E-08 1.3634E-09 -2.7204E-11 2.4463E-13

[0131] Table 12

[0132] Fig. 8A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind 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.

[0133] Example 5

[0134] 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.

[0135] like Fig. 9 As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0136] 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 concave, and its image side surface S8 is convex. 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 light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0137] In this example, the total effective focal length f of the optical imaging lens is 5.22 mm, the total length TTL of the optical imaging lens is 6.07 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76 mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field of view Semi-FOV of the optical imaging lens is 41.71°.

[0138] Table 13 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). Tables 14 and 15 show the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror surface S1-S12 in Example 5, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0139]

[0140] Table 13

[0141] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.4890E-03 3.1064E-02 -1.2238E-01 2.1987E-01 1.7707E-01 -1.8914E+00 4.8084E+00 S2 -1.9676E-02 2.9994E-02 -5.5561E-02 -2.1364E-01 1.9938E+00 -6.8805E+00 1.3997E+01 S3 -2.1479E-02 5.2812E-02 -3.5540E-01 2.7785E+00 -1.3345E+01 4.1708E+01 -8.8995E+01 S4 -6.9440E-03 1.2278E-01 -9.1537E-01 5.6908E+00 -2.5360E+01 8.4471E+01 -2.1316E+02 S5 -4.7571E-02 4.8386E-02 -7.3117E-01 5.5232E+00 -2.6528E+01 8.6759E+01 -2.0146E+02 S6 -6.1036E-02 1.9146E-03 2.7142E-01 -1.8220E+00 6.6171E+00 -1.6075E+01 2.7732E+01 S7 -1.2747E-01 6.0866E-02 7.6068E-02 -7.2285E-01 2.6562E+00 -6.3122E+00 1.0353E+01 S8 -1.4259E-01 1.3547E-01 -2.6498E-01 5.2089E-01 -7.5416E-01 7.6271E-01 -5.2638E-01 S9 -3.4591E-02 -2.3548E-02 7.5151E-02 -1.2335E-01 1.2672E-01 -8.7686E-02 4.2248E-02 S10 1.0187E-02 -5.3892E-03 1.6781E-02 -3.0157E-02 2.8509E-02 -1.6950E-02 6.8122E-03 S11 -2.3219E-01 1.3629E-01 -6.0771E-02 2.1643E-02 -5.9109E-03 1.2305E-03 -1.9737E-04 S12 -2.6471E-01 1.7578E-01 -9.7890E-02 4.1878E-02 -1.3351E-02 3.1452E-03 -5.4717E-04

[0142] Table 14

[0143] Face number A18 A20 A22 A24 A26 A28 A30 S1 -7.0607E+00 6.7915E+00 -4.4229E+00 1.9388E+00 -5.4900E-01 9.0813E-02 -6.6696E-03 S2 -1.8660E+01 1.6916E+01 -1.0491E+01 4.3712E+00 -1.1642E+00 1.7778E-01 -1.1700E-02 S3 1.3307E+02 -1.4082E+02 1.0498E+02 -5.3923E+01 1.8166E+01 -3.6128E+00 3.2155E-01 S4 4.0435E+02 -5.6643E+02 5.7204E+02 -4.0240E+02 1.8634E+02 -5.0923E+01 6.2126E+00 S5 3.3859E+02 -4.1323E+02 3.6224E+02 -2.2192E+02 9.0051E+01 -2.1715E+01 2.3531E+00 S6 -3.4807E+01 3.1949E+01 -2.1227E+01 9.9293E+00 -3.0969E+00 5.7722E-01 -4.8548E-02 S7 -1.1982E+01 9.8482E+00 -5.7062E+00 2.2755E+00 -5.9359E-01 9.1049E-02 -6.2136E-03 S8 2.3644E-01 -5.8694E-02 7.7854E-04 4.6272E-03 -1.5254E-03 2.2117E-04 -1.2782E-05 S9 -1.4409E-02 3.4919E-03 -5.9607E-04 6.9937E-05 -5.3633E-06 2.4196E-07 -4.8696E-09 S10 -1.9138E-03 3.8066E-04 -5.3417E-05 5.1760E-06 -3.2979E-07 1.2439E-08 -2.1050E-10 S11 2.4490E-05 -2.3252E-06 1.6466E-07 -8.3556E-09 2.8531E-10 -5.8469E-12 5.4183E-14 S12 7.0201E-05 -6.5989E-06 4.4757E-07 -2.1270E-08 6.7080E-10 -1.2592E-11 1.0638E-13

[0144] Table 15

[0145] Fig. 10A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind 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.

[0146] Example 6

[0147] The following reference Figures 11 to 12D An optical imaging lens according to Example 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.

[0148] like Fig.11 As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0149] 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 concave, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. 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 light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0150] In this example, the total effective focal length f of the optical imaging lens is 5.26 mm, the total length TTL of the optical imaging lens is 6.07 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76 mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field of view Semi-FOV of the optical imaging lens is 41.25°.

[0151] Table 16 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). Tables 17 and 18 show the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror surface S1-S12 in Example 6, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0152]

[0153] Table 16

[0154] Face number A4 A6 A8 A10 A12 A14 A16 S1 -6.6007E-03 8.8317E-02 -6.0613E-01 2.6720E+00 -7.9337E+00 1.6458E+01 -2.4401E+01 S2 -1.7069E-02 -2.6093E-02 3.2549E-01 -1.7551E+00 6.1004E+00 -1.4429E+01 2.3872E+01 S3 -2.4334E-02 8.7966E-02 -6.7896E-01 4.5459E+00 -1.9515E+01 5.6321E+01 -1.1336E+02 S4 5.1080E-03 -1.5998E-01 2.8633E+00 -2.5070E+01 1.3949E+02 -5.2390E+02 1.3751E+03 S5 -3.5838E-02 -2.0490E-01 2.0155E+00 -1.2791E+01 5.4972E+01 -1.6705E+02 3.6688E+02 S6 -5.8721E-02 3.1451E-02 -6.9453E-02 -1.1142E-01 1.3289E+00 -4.8995E+00 1.0749E+01 S7 -1.4058E-01 2.4231E-01 -1.0435E+00 3.5983E+00 -8.8109E+00 1.5397E+01 -1.9469E+01 S8 -1.4913E-01 1.9214E-01 -5.4709E-01 1.3351E+00 -2.3116E+00 2.8473E+00 -2.5254E+00 S9 -3.5498E-02 -1.5144E-02 6.0296E-02 -1.1339E-01 1.2654E-01 -9.2388E-02 4.6216E-02 S10 5.3554E-03 1.0065E-02 -3.6338E-03 -1.4195E-02 2.0104E-02 -1.3813E-02 5.9643E-03 S11 -2.2165E-01 1.2140E-01 -5.3675E-02 1.9533E-02 -5.4805E-03 1.1654E-03 -1.8966E-04 S12 -2.5048E-01 1.6020E-01 -8.7953E-02 3.7606E-02 -1.2095E-02 2.8936E-03 -5.1356E-04

[0155] Table 17

[0156] Face number A18 A20 A22 A24 A26 A28 A30 S1 2.6150E+01 -2.0272E+01 1.1246E+01 -4.3485E+00 1.1121E+00 -1.6894E-01 1.1538E-02 S2 -2.8059E+01 2.3519E+01 -1.3934E+01 5.6877E+00 -1.5180E+00 2.3767E-01 -1.6484E-02 S3 1.6227E+02 -1.6618E+02 1.2086E+02 -6.0931E+01 2.0239E+01 -3.9828E+00 3.5164E-01 S4 -2.5699E+03 3.4390E+03 -3.2706E+03 2.1576E+03 -9.3842E+02 2.4193E+02 -2.7998E+01 S5 -5.8837E+02 6.8876E+02 -5.8160E+02 3.4468E+02 -1.3591E+02 3.1994E+01 -3.3996E+00 S6 -1.5735E+01 1.5967E+01 -1.1310E+01 5.4996E+00 -1.7525E+00 3.2984E-01 -2.7802E-02 S7 1.7937E+01 -1.2016E+01 5.7791E+00 -1.9401E+00 4.3068E-01 -5.6687E-02 3.3432E-03 S8 1.6237E+00 -7.5530E-01 2.5103E-01 -5.7996E-02 8.8332E-03 -7.9604E-04 3.2093E-05 S9 -1.6215E-02 4.0205E-03 -6.9988E-04 8.3563E-05 -6.5110E-06 2.9807E-07 -6.0801E-09 S10 -1.7474E-03 3.5721E-04 -5.1108E-05 5.0242E-06 -3.2361E-07 1.2303E-08 -2.0933E-10 S11 2.3781E-05 -2.2793E-06 1.6304E-07 -8.3646E-09 2.8892E-10 -5.9881E-12 5.6075E-14 S12 6.7425E-05 -6.4993E-06 4.5272E-07 -2.2122E-08 7.1800E-10 -1.3881E-11 1.2082E-13

[0157] Table 18

[0158] Fig. 12A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of light of different wavelengths from the focal point behind 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.

[0159] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 19.

[0160] Conditional / Example 1 2 3 4 5 6 f / EPD 1.88 1.88 1.88 1.88 1.88 1.88 TTL / ImgH 1.25 1.21 1.25 1.26 1.27 1.28 |R7 / f| 3.59 4.87 3.00 3.14 2.05 2.79 T56 / CT5 1.55 1.78 1.46 1.39 1.29 1.55 (R11+R12) / (R11-R12) 2.02 1.93 1.99 2.00 2.00 2.44 (CT1+CT2+CT3) / (T12+T23) 3.56 2.84 3.10 3.17 2.96 3.49 Etmax(mm) 0.41 0.38 0.39 0.41 0.43 0.46 SAG52 / SAG51 1.61 1.72 1.56 1.46 1.59 1.27 |CT3 / SAG32| 2.53 2.83 2.12 2.43 2.25 2.50 f2 / f1 -2.42 -2.56 -2.59 -2.31 -2.40 -2.36 f123 / f1 1.37 1.52 1.34 1.40 1.36 1.37 |R2 / f1|+|R3 / f2| 5.09 3.70 4.69 5.69 5.11 4.81 (CT1+CT3) / (T12+T23) 2.86 2.26 2.49 2.54 2.37 2.79 f5×tan(Semi-FOV) / R9 1.35 1.34 1.33 1.33 1.36 1.68 f12 / f 1.19 1.21 1.18 1.23 1.21 1.20

[0161] Table 19

[0162] The present application also provides a camera device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent camera device such as a digital camera, or a camera module integrated in a mobile electronic device such as a mobile phone. The camera device is equipped with the optical imaging lens described above.

[0163] 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 the invention 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 inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

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; a third lens having optical power; a fourth lens having negative optical power; a fifth lens element having positive refractive power and a convex object-side surface; and a sixth lens having negative optical power, whose object side surface is convex and whose image side surface is concave; The number of lenses having optical power in the optical imaging lens is six; The optical imaging lens meets the following requirements: 1.7 <f / EPD≤1.88; 1.21≤TTL / ImgH<1.3; 1.29≤T56 / CT5≤1.78; 1.93≤(R11+R12) / (R11-R12)≤2.44; and <h2 style=";text-align:left;direction:ltr">≤2.05<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> R7 / f<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> ≤4.87, Wherein, f is the total effective focal length of the optical imaging lens, EPD is the entrance pupil diameter of the optical imaging lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, ImgH is half of the diagonal length of the effective pixel area on the imaging surface, T56 is the spacing distance between the fifth lens and the sixth lens along the optical axis, CT5 is the center thickness of the fifth lens along the optical axis, R11 is the curvature radius of the object side surface of the sixth lens, R12 is the curvature radius of the image side surface of the sixth lens, and R7 is the curvature radius of the object side surface of the fourth lens.

2. The optical imaging lens according to claim 1, wherein: 2.8<(CT1+CT2+CT3) / (T12+T23)≤3.56, Among them, CT1 is the center thickness of the first lens along the optical axis, CT2 is the center thickness of the second lens along the optical axis, CT3 is the center thickness of the third lens along the optical axis, T12 is the spacing distance between the first lens and the second lens along the optical axis, and T23 is the spacing distance between the second lens and the third lens along the optical axis.

3. The optical imaging lens according to claim 1, wherein: A maximum value ETmax of edge thicknesses of the first lens to the sixth lens satisfies: 0.38 mm ≤ ETmax < 0.5 mm.

4. The optical imaging lens according to claim 1, wherein: 1.27≤SAG52 / SAG51≤1.72, Among them, SAG51 is the distance from the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens in the direction of the optical axis, and SAG52 is the distance from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens in the direction of the optical axis.

5. The optical imaging lens according to claim 1, wherein: <h2 style=";text-align:left;direction:ltr">2.12≤<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> CT3 / SAG32<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> ≤2.83, Wherein, CT3 is the central thickness of the third lens along the optical axis, and SAG32 is the distance from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens in the direction of the optical axis.

6. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -2.59≤f2 / f1≤-2.

31.

7. The optical imaging lens according to claim 1, wherein: The combined focal length f123 of the first lens, the second lens and the third lens and the total effective focal length f satisfy: 1.30 <f123 / f<1.55。 8. The optical imaging lens according to claim 1, wherein: <h2 style=";text-align:left;direction:ltr">3.70≤<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> R2 / f1<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> +<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> R3 / f2<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> <5.7, Among them, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, R2 is the radius of curvature of the image-side surface of the first lens, and R3 is the radius of curvature of the object-side surface of the second lens.

9. The optical imaging lens according to claim 1, wherein: 2.26≤(CT1+CT3) / (T12+T23)≤2.86, Among them, CT1 is the center thickness of the first lens along the optical axis, CT3 is the center thickness of the third lens along the optical axis, T12 is the spacing distance between the first lens and the second lens along the optical axis, and T23 is the spacing distance between the second lens and the third lens along the optical axis.

10. The optical imaging lens according to claim 1, wherein: The total effective focal length f and the combined focal length f12 of the first lens and the second lens satisfy: 1.18≤f12 / f≤1.

23.

11. The optical imaging lens according to any one of claims 1 to 10, characterized in that: 1.3 <f5×tan(Semi-FOV) / R9<1.7, Among them, f5 is the effective focal length of the fifth lens, R9 is the radius of curvature of the object side of the fifth lens, and Semi-FOV is the maximum half field of view angle of the optical imaging lens.

Images