Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens having optical power along the optical axis from the object side to the image side, wherein the second lens has positive optical power, and the image side surface of the fourth lens is concave; and the radius of curvature R2 of the image side surface of the first lens, the radius of curvature R5 of the object side surface of the third lens, and the effective focal length f3 of the third lens satisfy 2.5 < (R2 + R5) / f3 < 11.0.

Description

Technical Field

[0001] The present application relates to an optical imaging lens, and more specifically, to an optical imaging lens including six lenses. Background Art

[0002] As a member of the multi-camera imaging lenses in current mobile phone cameras, the telephoto lens has become an essential tool for a large number of photography enthusiasts who love to photograph people, wild animals, the moon, etc. due to its unique following characteristics: 1) It can zoom in on the subject, making the picture concise and removing unwanted picture content; 2) It can shorten the spatial distance between the distant view and the close view, and photograph distant scenes in a compact picture effect, thus achieving the effect of compressing space; 3) It can achieve background blurring.

[0003] With the continuous development of portable electronic products such as smart phones, people have put forward higher requirements for the performance of mobile phone optical imaging lenses. The multi-lens optical imaging lens provides more design freedoms and thus greater possibilities for improving the performance of mobile phones. How to ensure miniaturization and better imaging quality while realizing the characteristics of the above telephoto lens poses a new challenge to the technical design in this field. Summary of the Invention

[0004] The present application provides an optical imaging lens applicable to portable electronic products, which can at least solve or partially solve at least one shortcoming in the prior art, such as a telephoto optical imaging lens.

[0005] The present application provides such an optical imaging lens, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens that may have optical power along the optical axis from the object side to the image side, and the image side of the fourth lens may be concave.

[0006] In one embodiment, the radius of curvature R2 of the image side of the first lens, the radius of curvature R5 of the object side of the third lens, and the effective focal length f3 of the third lens may satisfy 2.5 < (R2 + R5) / f3 < 11.0.

[0007] In one embodiment, the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens may satisfy TTL / f < 1.

[0008] In one embodiment, the maximum half field of view Semi-Fov of the optical imaging lens and the effective focal length f1 of the first lens may satisfy 1.0 mm < tan(Semi-Fov) × f1 < 1.6 mm.

[0009] In one embodiment, the second lens may have positive optical power, its object side may be convex, and its image side may be concave.

[0010] In one embodiment, the total effective focal length f of the optical imaging lens and the radius of curvature R1 of the object side surface of the first lens may satisfy 3.0 < f / R1 < 4.0.

[0011] In one embodiment, the radius of curvature R8 of the image side surface of the fourth lens, the radius of curvature R10 of the image side surface of the fifth lens, and the total effective focal length f of the optical imaging lens may satisfy 1.0 < (R8 + R10) / f < 2.0.

[0012] In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT6 of the sixth lens on the optical axis may satisfy 1.0 < CT1 / CT6 < 3.0.

[0013] In one embodiment, the air gap T34 between the third lens and the fourth lens on the optical axis and the air gap T45 between the fourth lens and the fifth lens on the optical axis may satisfy 1.5 < T45 / T34 < 4.5.

[0014] In one embodiment, the central thickness CT5 of the fifth lens on the optical axis and the air gap T56 between the fifth lens and the sixth lens on the optical axis may satisfy 0.5 < T56 / CT5 < 2.5.

[0015] In one embodiment, the effective focal length f2 of the second lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R9 of the object side surface of the fifth lens may satisfy 1.5 < f2 / (|R3 + R9|) < 4.0.

[0016] In one embodiment, the object side surface of the first lens may be convex, and the image side surface may be convex.

[0017] In one embodiment, the object side surface of the sixth lens may be convex, and the image side surface may be concave.

[0018] This application uses six lenses. By reasonably allocating the optical power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the above optical imaging lens has at least one beneficial effect such as long focal length, high imaging quality, and miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In combination with the accompanying drawings, through the following detailed description of non-limiting embodiments, other features, objects, and advantages of this application will become more apparent. In the drawings:

[0020] Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of this application is shown;

[0021] Figures 2A to 2CThe axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Embodiment 1 are respectively shown;

[0022] Figure 3 The schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application is shown;

[0023] Figures 4A to 4C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Embodiment 2 are respectively shown;

[0024] Figure 5 The schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application is shown;

[0025] Figures 6A to 6C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Embodiment 3 are respectively shown;

[0026] Figure 7 The schematic structural diagram of the optical imaging lens according to Embodiment 4 of the present application is shown;

[0027] Figures 8A to 8C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Embodiment 4 are respectively shown;

[0028] Figure 9 The schematic structural diagram of the optical imaging lens according to Embodiment 5 of the present application is shown;

[0029] Figures 10A to 10C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Embodiment 5 are respectively shown;

[0030] Figure 11 The schematic structural diagram of the optical imaging lens according to Embodiment 6 of the present application is shown;

[0031] Figures 12A to 12C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Embodiment 6 are respectively shown;

[0032] Figure 13 The schematic structural diagram of the optical imaging lens according to Embodiment 7 of the present application is shown;

[0033] Figures 14A to 14C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Embodiment 7 are respectively shown;

[0034] Figure 15 The schematic structural diagram of the optical imaging lens according to Embodiment 8 of the present application is shown;

[0035] Figures 16A to 16CThe axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens according to Embodiment 8 are respectively shown;

[0036] Figure 17 The structural schematic diagram of the optical imaging lens according to Embodiment 9 of the present application is shown;

[0037] Figures 18A to 18C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens according to Embodiment 9 are respectively shown. Detailed implementation manners

[0038] To better understand the present application, more detailed descriptions of various aspects of the present application will be made 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 do not 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.

[0039] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0040] In the drawings, for the sake of convenience of illustration, the thickness, size, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only for illustration and are not drawn strictly to scale.

[0041] 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 to be photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

[0042] It should also be understood that the terms "comprising", "comprises", "having", "includes" and / or "including", when used in this specification, denote the presence of the stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. Further, when an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features, rather than modifying a single element in the list. Further, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application". Also, the term "exemplary" is intended to refer to an example or illustration.

[0043] Unless otherwise defined, all terms used herein (including technical and scientific terms) 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 a common dictionary) should be interpreted as having a meaning 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.

[0044] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0045] The features, principles and other aspects of the present application will be described in detail below.

[0046] The optical imaging lens according to an exemplary embodiment of the present application may include, for example, 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. These six lenses are arranged in order from the object side to the image side along the optical axis. An air gap may be provided between any two adjacent lenses among the first lens to the sixth lens.

[0047] In an exemplary embodiment, the first lens has a positive or negative optical power; the second lens has a positive or negative optical power; the third lens has a positive or negative optical power; the fourth lens has a positive or negative optical power, and its image side may be concave; the fifth lens has a positive or negative optical power; the sixth lens has a positive or negative optical power. The first lens and the second lens have optical powers, which are beneficial to increasing the field of view angle and also beneficial to compressing the incident angle of light at the aperture position, reducing the pupil aberration, and improving the imaging quality; the third lens has an optical power, which is beneficial to reducing the spherical aberration and astigmatism of the optical imaging lens; the fourth lens has an optical power, and its image side is concave, which helps the compact optical imaging lens to achieve good imaging quality and loose processing characteristics; the fifth lens and the sixth lens have optical powers, which can reasonably control the contribution of spherical aberration of the fifth lens and the sixth lens within a reasonable level, so that good imaging quality can be obtained for the on-axis field of view.

[0048] In an exemplary embodiment, the second lens has a positive optical power, its object side is convex, and its image side is concave. By defining the optical power of the second lens and the curvature radii of the object side and the image side, it is beneficial to reduce the spherical aberration and astigmatism of the optical imaging lens.

[0049] In an exemplary embodiment, the object side of the first lens is convex and the image side is convex. By defining the object side and the image side of the first lens, it is beneficial to increase the field of view angle and also beneficial to compressing the incident angle of light at the aperture position, reducing the pupil aberration, and improving the imaging quality.

[0050] In an exemplary embodiment, the object side of the sixth lens is convex and the image side is concave. By defining the object side and the image side of the sixth lens, it is beneficial to achieve a compact optical lens structure and have a long back focal length.

[0051] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 2.5 < (R2 + R5) / f3 < 11.0, where R2 is the curvature radius of the image side of the first lens, R5 is the curvature radius of the object side of the third lens, and f3 is the effective focal length of the third lens. More specifically, R2, R5, and f3 can further satisfy 2.66 ≤ (R2 + R5) / f3 ≤ 10.66. Satisfying the conditional formula 2.5 < (R2 + R5) / f3 < 11.0 can effectively correct the astigmatism of the optical imaging lens, and thus ensure the image quality of the edge field of view. Optionally, the object side of the third lens may be concave. Optionally, the third lens may have a negative optical power.

[0052] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula TTL / f < 1, where TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, and f is the total effective focal length of the optical imaging lens. More specifically, TTL and f can further satisfy 0.8 < TTL / f < 1, for example, 0.89 ≤ TTL / f ≤ 0.98. By controlling the ratio of the axial distance from the object side surface of the first lens to the imaging surface to the total effective focal length of the optical imaging lens, the telephoto characteristics of the optical imaging lens can be effectively ensured, thereby achieving effects such as zooming in on the shooting subject, blurring the background, and achieving the effect of compressing space.

[0053] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 1.0 mm < tan(Semi-Fov) × f1 < 1.6 mm, where Semi-Fov is the maximum half field of view angle of the optical imaging lens, and f1 is the effective focal length of the first lens. More specifically, Semi-Fov and f1 can further satisfy 1.22 mm ≤ tan(Semi-Fov) × f1 ≤ 1.50 mm. By controlling the maximum field of view angle of the optical imaging lens and the effective focal length of the first lens, the optical imaging lens can achieve an appropriate field of view angle to meet the requirements of conventional shooting. Optionally, the first lens can have a positive optical power.

[0054] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 3.0 < f / R1 < 4.0, where f is the total effective focal length of the optical imaging lens, and R1 is the radius of curvature of the object side surface of the first lens. More specifically, f and R1 can further satisfy 3.08 ≤ f / R1 ≤ 3.83. By controlling the ratio of the total effective focal length of the optical imaging lens to the radius of curvature of the object side surface of the first lens, the aperture size of the first lens can be effectively controlled, thereby controlling the light passing amount of the optical system within a reasonable range.

[0055] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 1.0 < (R8 + R10) / f < 2.0, where R8 is the radius of curvature of the image side surface of the fourth lens, R10 is the radius of curvature of the image side surface of the fifth lens, and f is the total effective focal length of the optical imaging lens. More specifically, R8, R10, and f can further satisfy 1.22 ≤ (R8 + R10) / f ≤ 1.94. By satisfying the conditional formula 1.0 < (R8 + R10) / f < 2.0, the astigmatism of the optical imaging lens can be effectively corrected, and further, the image quality of the edge field of view can be ensured. Optionally, the image side surface of the fifth lens can be concave.

[0056] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 1.0 < CT1 / CT6 < 3.0, where CT1 is the central thickness of the first lens on the optical axis, and CT6 is the central thickness of the sixth lens on the optical axis. More specifically, CT1 and CT6 can further satisfy 1.26 ≤ CT1 / CT6 ≤ 2.51. By controlling the ratio of the central thickness of the first lens on the optical axis to the central thickness of the sixth lens on the optical axis, the shapes and thicknesses of the first lens and the sixth lens can be effectively constrained, making the thickness of each lens uniform, which is convenient for molding and processing.

[0057] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 1.5 < T45 / T34 < 4.5, where T34 is the air gap between the third lens and the fourth lens on the optical axis, and T45 is the air gap between the fourth lens and the fifth lens on the optical axis. More specifically, T45 and T34 can further satisfy 1.92 ≤ T45 / T34 ≤ 4.21. By controlling the air gap between the third lens and the fourth lens on the optical axis and the air gap between the fourth lens and the fifth lens on the optical axis, the thicknesses and positions of the third lens, the fourth lens, and the fifth lens can be effectively constrained, making the lens thickness uniform and the structural arrangement uniform, which is convenient for molding processing and assembly.

[0058] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.5 < T56 / CT5 < 2.5, where CT5 is the central thickness of the fifth lens on the optical axis, and T56 is the air gap between the fifth lens and the sixth lens on the optical axis. More specifically, T56 and CT5 can further satisfy 0.5 < T56 / CT5 < 2.1, for example, 0.56 ≤ T56 / CT5 ≤ 2.08. Satisfying the conditional formula 0.5 < T56 / CT5 < 2.5 can effectively constrain the shape and thickness of the fifth lens, making the lens thickness uniform, which is convenient for molding and processing.

[0059] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 1.5 < f2 / (|R3 + R9|) < 4.0, where f2 is the effective focal length of the second lens, R3 is the curvature radius of the object side of the second lens, and R9 is the curvature radius of the object side of the fifth lens. More specifically, f2, R3, and R9 can further satisfy 1.98 ≤ f2 / (|R3 + R9|) ≤ 3.99. Satisfying the conditional formula 1.5 < f2 / (|R3 + R9|) < 4.0 can well balance the coma generated by the front-end lens and obtain good imaging quality.

[0060] In an exemplary embodiment, the above optical imaging lens may further include at least one aperture to improve the imaging quality. Optionally, the aperture may be disposed between the object side and the first lens to limit the aperture of the light beam. Optionally, the above optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0061] The optical imaging lens according to the above embodiment of the present application may employ multiple lenses, such as the six lenses described above. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the volume of the imaging lens can be effectively reduced, the sensitivity of the imaging lens can be lowered, and the processability of the imaging lens can be improved, making the optical imaging lens more conducive to production and processing and applicable to portable electronic products. The present application proposes a solution for a six-lens optical imaging lens, which has characteristics such as long focal length, high imaging quality, and miniaturization, and can match higher-pixel sensors and stronger image processing technologies.

[0062] In an embodiment of the present application, at least one of the lens surfaces of each lens is an aspherical surface, that is, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is an aspherical surface. The characteristic of an aspherical lens is that the curvature continuously changes from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate as much as possible the aberration that appears during imaging, thereby improving the imaging quality. Optionally, both the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are aspherical surfaces.

[0063] However, those skilled in the art should understand that without departing from the technical solutions 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 embodiment, the optical imaging lens is not limited to including six lenses. If necessary, the optical imaging lens may further include other numbers of lenses.

[0064] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings.

[0065] Example 1

[0066] The following refers to Figures 1 to 2C Describe the optical imaging lens according to Embodiment 1 of the present application. Figure 1The schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0067] As Figure 1 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: 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 S16.

[0068] The first lens E1 has a positive optical power, its object surface S1 is convex, and its image surface S2 is convex. The second lens E2 has a positive optical power, its object surface S3 is convex, and its image surface S4 is concave. The third lens E3 has a negative optical power, its object surface S6 is concave, and its image surface S7 is concave. The fourth lens E4 has a positive optical power, its object surface S8 is convex, and its image surface S9 is concave. The fifth lens E5 has a negative optical power, its object surface S10 is convex, and its image surface S11 is concave. The sixth lens E6 has a positive optical power, its object surface S12 is convex, and its image surface S13 is concave. The filter E7 has an object surface S14 and an image surface S15. The light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0069] In the optical imaging lens of this embodiment, a diaphragm STO for restricting the aperture of the light beam can be provided between the object side and the first lens E1 to improve the imaging quality. Optionally, the optical imaging lens of this embodiment may further include a virtual spacer S5 disposed between the second lens E2 and the third lens E3.

[0070] Table 1 shows the basic parameter table of the optical imaging lens of Embodiment 1, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0071]

[0072] Table 1

[0073] Among them, f is the total effective focal length of the optical imaging lens, TTL is the distance on the optical axis from the object surface S1 of the first lens E1 to the imaging surface S16 of the optical imaging lens, ImgH is half of the diagonal length of the effective pixel region on the imaging surface S16, Semi-Fov is the maximum half field of view angle of the optical imaging lens, and Fno is the f-number of the optical imaging lens.

[0074] In Embodiment 1, the object surface and the image surface of any one of the first lens E1 to the sixth lens E6 are both aspherical surfaces, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0075]

[0076] Where x is the sagitta, which is the distance from the vertex of the aspherical surface to the position along the optical axis at a height h; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic constant; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the high-order coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0077]

[0078]

[0079] Table 2

[0080] Figure 2A shows the axial chromatic aberration curve of the optical imaging lens of Example 1, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 2B shows the astigmatism curve of the optical imaging lens of Example 1, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2C shows the distortion curve of the optical imaging lens of Example 1, which represents the distortion magnitude values corresponding to different image heights. According to Figures 2A to 2C it can be seen that the optical imaging lens given in Example 1 can achieve good imaging quality.

[0081] Example 2

[0082] The following will refer to Figures 3 to 4C to describe the optical imaging lens according to Embodiment 2 of the present application. In this embodiment and the following embodiments, for the sake of simplicity, some descriptions similar to those in Example 1 will be omitted. Figure 3 shows a schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application.

[0083] As Figure 3 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: 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 S16.

[0084] The first lens E1 has a positive focal power, with its object side S1 being convex and its image side S2 being convex. The second lens E2 has a positive focal power, with its object side S3 being convex and its image side S4 being concave. The third lens E3 has a negative focal power, with its object side S6 being concave and its image side S7 being concave. The fourth lens E4 has a positive focal power, with its object side S8 being convex and its image side S9 being concave. The fifth lens E5 has a negative focal power, with its object side S10 being convex and its image side S11 being concave. The sixth lens E6 has a negative focal power, with its object side S12 being convex and its image side S13 being concave. The filter E7 has an object side S14 and an image side S15. Light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0085] In the optical imaging lens of this embodiment, a diaphragm STO for restricting the aperture of the light beam can be disposed between the object side and the first lens E1 to improve the imaging quality. Optionally, the optical imaging lens of this embodiment may further include a virtual spacer S5 disposed between the second lens E2 and the third lens E3.

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

[0087]

[0088]

[0089] Table 3

[0090] Surface number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 6.9954E-02 -4.3547E-02 1.1429E-01 -2.2129E-01 2.7327E-01 -2.1042E-01 9.7987E-02 -2.5271E-02 2.7595E-03 S2 -4.1104E-01 1.6571E+00 -3.7480E+00 5.6436E+00 -5.7480E+00 3.8939E+00 -1.6753E+00 4.1253E-01 -4.4033E-02 S3 -4.0940E-01 1.6016E+00 -3.6757E+00 5.5768E+00 -5.7182E+00 3.9173E+00 -1.7135E+00 4.3110E-01 -4.7220E-02 S4 2.5019E-02 2.8798E-01 -1.1609E+00 2.1147E+00 -2.2917E+00 1.6061E+00 -7.2631E-01 1.9239E-01 -2.2383E-02 S6 3.4261E-01 -2.8904E-01 -4.6118E-01 1.8161E+00 -2.5345E+00 2.0087E+00 -9.1597E-01 2.0170E-01 -1.0674E-02 S7 4.2137E-01 -8.4533E-01 1.0098E+00 -4.8963E-01 -3.2438E-01 7.4720E-01 -5.0554E-01 1.4417E-01 -2.3265E-02 S8 -4.1957E-02 -4.8001E-01 1.5146E+00 -4.4544E+00 9.7846E+00 -1.4005E+01 1.2405E+01 -6.2117E+00 1.3335E+00 S9 -4.9698E-02 -1.8525E-01 4.2754E-01 -6.8118E-01 1.0677E+00 -1.1951E+00 8.2895E-01 -3.2821E-01 5.6924E-02 S10 -8.6270E-02 1.4673E-02 1.1210E-02 -6.8984E-02 8.8641E-02 -5.2344E-02 1.6368E-02 -2.6362E-03 1.7227E-04 S11 -9.2433E-02 8.2734E-02 -8.3192E-02 4.9292E-02 -1.7793E-02 4.1413E-03 -6.2603E-04 5.2930E-05 -1.4380E-06 S12 -9.8743E-02 5.1902E-02 -1.1558E-02 1.4688E-04 -7.0647E-04 7.7721E-04 -2.4815E-04 3.4501E-05 -1.8359E-06 S13 -8.8973E-02 3.8652E-02 -1.5109E-02 6.6280E-03 -2.4467E-03 5.4755E-04 -6.1712E-05 2.4530E-06 3.1537E-08

[0091] Table 4

[0092] Figure 4A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 2, which represents the deviation of the focusing points of light rays of different wavelengths after passing through the lens. Figure 4B shows the astigmatism curve of the optical imaging lens of Embodiment 2, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C shows the distortion curve of the optical imaging lens of Embodiment 2, which represents the distortion magnitude values corresponding to different image heights. According to Figures 4A to 4C it can be known that the optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0093] Example 3

[0094] The following refers to Figures 5 to 6CDescribes an optical imaging lens according to Embodiment 3 of the present application. Figure 5 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application.

[0095] As Figure 5 Shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: 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 S16.

[0096] The first lens E1 has a positive optical power, its object surface S1 is convex, and its image surface S2 is convex. The second lens E2 has a positive optical power, its object surface S3 is convex, and its image surface S4 is concave. The third lens E3 has a negative optical power, its object surface S6 is concave, and its image surface S7 is concave. The fourth lens E4 has a negative optical power, its object surface S8 is convex, and its image surface S9 is concave. The fifth lens E5 has a negative optical power, its object surface S10 is convex, and its image surface S11 is concave. The sixth lens E6 has a negative optical power, its object surface S12 is convex, and its image surface S13 is concave. The filter E7 has an object surface S14 and an image surface S15. Light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0097] In the optical imaging lens of this embodiment, a diaphragm STO for restricting the aperture of the light beam can be provided between the object side and the first lens E1 to improve the imaging quality. Optionally, the optical imaging lens of this embodiment may further include a virtual spacer S5 disposed between the second lens E2 and the third lens E3.

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

[0099]

[0100] Table 5

[0101] Surface number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 7.8474E-02 -5.0377E-02 1.6484E-01 -3.7817E-01 5.4463E-01 -4.8650E-01 2.6189E-01 -7.7795E-02 9.7526E-03 S2 -5.1426E-01 2.7690E+00 -8.1069E+00 1.5561E+01 -2.0129E+01 1.7312E+01 -9.4414E+00 2.9384E+00 -3.9549E-01 S3 -5.5061E-01 2.7874E+00 -8.1335E+00 1.5555E+01 -2.0124E+01 1.7441E+01 -9.6572E+00 3.0695E+00 -4.2356E-01 S4 -8.1449E-02 8.7406E-01 -3.0324E+00 5.9446E+00 -7.5527E+00 6.5657E+00 -3.8644E+00 1.3866E+00 -2.2469E-01 S6 2.9717E-01 2.0857E-01 -2.5915E+00 7.5454E+00 -1.2736E+01 1.4092E+01 -1.0029E+01 4.0882E+00 -7.0578E-01 S7 3.8668E-01 -5.1595E-01 -8.2652E-01 5.2734E+00 -1.1338E+01 1.3521E+01 -8.5761E+00 1.9590E+00 2.4406E-01 S8 -4.8907E-02 -5.0562E-01 1.7263E+00 -5.8409E+00 1.5412E+01 -2.6442E+01 2.7816E+01 -1.6630E+01 4.3305E+00 S9 -2.8240E-02 -1.5356E-01 4.2576E-01 -7.1846E-01 1.5770E+00 -2.5271E+00 2.2781E+00 -1.0830E+00 2.1141E-01 S10 -8.3633E-02 2.8065E-02 -2.9802E-02 5.9752E-03 2.2595E-02 -1.8599E-02 5.9639E-03 -8.5461E-04 4.3438E-05 S11 -7.8305E-02 4.5616E-02 -3.4752E-02 1.3936E-02 -4.4714E-05 -2.4545E-03 1.1084E-03 -2.2315E-04 1.7690E-05 S12 -6.6428E-02 3.3329E-02 -1.3324E-02 9.9884E-03 -6.7978E-03 2.6354E-03 -5.6639E-04 6.4140E-05 -3.0171E-06 S13 -7.5016E-02 3.1390E-02 -1.8379E-02 1.0860E-02 -3.9111E-03 7.6862E-04 -7.5298E-05 2.6800E-06 2.2734E-08

[0102] Table 6

[0103] Figure 6A Shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 6B Shows the astigmatism curve of the optical imaging lens of Embodiment 3, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6CThe distortion curve of the optical imaging lens of Embodiment 3 is shown, which represents the distortion magnitude values corresponding to different image heights. According to Figures 6A to 6C it can be known that the optical imaging lens given in Embodiment 3 can achieve good imaging quality.

[0104] Example 4

[0105] The following refers to Figures 7 to 8C and describes the optical imaging lens according to Embodiment 4 of the present application. Figure 7 The structural schematic diagram of the optical imaging lens according to Embodiment 4 of the present application is shown.

[0106] As Figure 7 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: 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 S16.

[0107] The first lens E1 has a positive optical power, its object surface S1 is convex, and its image surface S2 is convex. The second lens E2 has a positive optical power, its object surface S3 is convex, and its image surface S4 is concave. The third lens E3 has a negative optical power, its object surface S6 is concave, and its image surface S7 is concave. The fourth lens E4 has a positive optical power, its object surface S8 is convex, and its image surface S9 is concave. The fifth lens E5 has a positive optical power, its object surface S10 is convex, and its image surface S11 is concave. The sixth lens E6 has a negative optical power, its object surface S12 is convex, and its image surface S13 is concave. The filter E7 has an object surface S14 and an image surface S15. The light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0108] In the optical imaging lens of this embodiment, a diaphragm STO for restricting the aperture of the light beam can be provided between the object side and the first lens E1 to improve the imaging quality. Optionally, the optical imaging lens of this embodiment may further include a virtual spacer S5 disposed between the second lens E2 and the third lens E3.

[0109] Table 7 shows the basic parameter table of the optical imaging lens of Embodiment 4, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm). Table 8 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 4, where each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.

[0110]

[0111] Table 7

[0112]

[0113]

[0114] Table 8

[0115] Figure 8A shows the axial chromatic aberration curve of the optical imaging lens of Example 4, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 8B shows the astigmatism curve of the optical imaging lens of Example 4, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C shows the distortion curve of the optical imaging lens of Example 4, which represents the distortion magnitude values corresponding to different image heights. According to Figures 8A to 8C it can be seen that the optical imaging lens given in Example 4 can achieve good imaging quality.

[0116] Example 5

[0117] The following refers to Figures 9 to 10C describes the optical imaging lens according to Embodiment 5 of the present application. Figure 9 shows a schematic structural diagram of the optical imaging lens according to Embodiment 5 of the present application.

[0118] As Figure 9 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: 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 S16.

[0119] The first lens E1 has a positive optical power, its object side surface S1 is a convex surface, and its image side surface S2 is a convex surface. The second lens E2 has a positive optical power, its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a negative optical power, its object side surface S6 is a concave surface, and its image side surface S7 is a concave surface. The fourth lens E4 has a positive optical power, its object side surface S8 is a convex surface, and its image side surface S9 is a concave surface. The fifth lens E5 has a positive optical power, its object side surface S10 is a convex surface, and its image side surface S11 is a concave surface. The sixth lens E6 has a negative optical power, its object side surface S12 is a convex surface, and its image side surface S13 is a concave surface. The filter E7 has an object side surface S14 and an image side surface S15. Light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0120] In the optical imaging lens of this embodiment, a diaphragm STO for restricting the aperture of the light beam can be disposed between the object side and the first lens E1 to improve the imaging quality. Optionally, the optical imaging lens of this embodiment may further include a virtual spacer S5 disposed between the second lens E2 and the third lens E3.

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

[0122]

[0123]

[0124] Table 9

[0125] Surface number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 5.8696E-02 -1.9194E-02 2.1172E-02 -2.5314E-02 2.3340E-02 -1.4366E-02 5.5113E-03 -1.1979E-03 1.0999E-04 S2 -4.6287E-01 1.7077E+00 -3.5294E+00 4.8052E+00 -4.4119E+00 2.6992E+00 -1.0529E+00 2.3625E-01 -2.3138E-02 S3 -4.4270E-01 1.6401E+00 -3.4759E+00 4.7836E+00 -4.4140E+00 2.7149E+00 -1.0674E+00 2.4220E-01 -2.4055E-02 S4 5.3495E-02 2.1460E-01 -9.2467E-01 1.5843E+00 -1.5842E+00 1.0218E+00 -4.2872E-01 1.0741E-01 -1.2147E-02 S6 3.8749E-01 -5.6140E-01 4.8693E-01 -2.1286E-01 1.2496E-01 -1.4637E-01 1.0696E-01 -4.0007E-02 6.3122E-03 S7 3.6484E-01 -7.5420E-01 1.1124E+00 -1.0848E+00 6.5298E-01 -2.7820E-02 -2.9620E-01 2.1371E-01 -5.3752E-02 S8 -8.1083E-02 -1.8442E-01 3.3787E-01 -6.7829E-01 1.1440E+00 -1.2624E+00 8.5775E-01 -3.2905E-01 5.1416E-02 S9 -5.2955E-02 -9.5651E-02 2.1541E-01 -3.9332E-01 6.4172E-01 -6.8440E-01 4.5062E-01 -1.6976E-01 2.8251E-02 S10 -9.5834E-02 3.6241E-02 -5.6324E-02 5.6739E-02 -4.0276E-02 2.2955E-02 -8.8416E-03 1.8767E-03 -1.6257E-04 S11 -9.4265E-02 7.9275E-02 -9.7356E-02 7.6904E-02 -4.1112E-02 1.4999E-02 -3.4903E-03 4.5403E-04 -2.4650E-05 S12 -1.1815E-01 7.6422E-02 -4.2390E-02 2.5177E-02 -1.5027E-02 6.0863E-03 -1.4182E-03 1.7321E-04 -8.6622E-06 S13 -7.0876E-02 1.6754E-02 3.5549E-03 -4.5972E-03 1.3665E-03 -1.6505E-04 7.7346E-06 -2.5795E-07 1.9392E-08

[0126] Table 10

[0127] Figure 10A shows the axial chromatic aberration curve of the optical imaging lens of Example 5, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 10B shows the astigmatism curve of the optical imaging lens of Example 5, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10C shows the distortion curve of the optical imaging lens of Example 5, which represents the distortion magnitude values corresponding to different image heights. According to Figures 10A to 10C it can be known that the optical imaging lens given in Example 5 can achieve good imaging quality.

[0128] Example 6

[0129] The following refers to Figures 11 to 12C to describe the optical imaging lens according to Embodiment 6 of the present application. Figure 11 shows a schematic structural diagram of the optical imaging lens according to Embodiment 6 of the present application.

[0130] As Figure 11 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: 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 S16.

[0131] The first lens E1 has a positive optical power, with its object side S1 being convex and its image side S2 being convex. The second lens E2 has a positive optical power, with its object side S3 being convex and its image side S4 being concave. The third lens E3 has a negative optical power, with its object side S6 being concave and its image side S7 being concave. The fourth lens E4 has a negative optical power, with its object side S8 being convex and its image side S9 being concave. The fifth lens E5 has a negative optical power, with its object side S10 being convex and its image side S11 being concave. The sixth lens E6 has a negative optical power, with its object side S12 being concave and its image side S13 being concave. The filter E7 has an object side S14 and an image side S15. Light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0132] In the optical imaging lens of this embodiment, a diaphragm STO for limiting the aperture of the light beam can be disposed between the object side and the first lens E1 to improve the imaging quality. Optionally, the optical imaging lens of this embodiment may further include a virtual spacer S5 disposed between the second lens E2 and the third lens E3.

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

[0134]

[0135] Table 11

[0136] Surface number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 5.8547E-02 -2.3938E-02 3.2884E-02 -4.7398E-02 4.8538E-02 -3.1672E-02 1.2656E-02 -2.8480E-03 2.8137E-04 S2 -4.5669E-01 1.5065E+00 -2.9248E+00 3.8561E+00 -3.4928E+00 2.1295E+00 -8.3244E-01 1.8826E-01 -1.8718E-02 S3 -4.2744E-01 1.3975E+00 -2.7219E+00 3.5959E+00 -3.2833E+00 2.0305E+00 -8.0828E-01 1.8648E-01 -1.8955E-02 S4 4.4852E-02 1.0480E-01 -4.4014E-01 7.8493E-01 -8.9615E-01 6.9136E-01 -3.3932E-01 9.3298E-02 -1.0839E-02 S6 3.5323E-01 -5.8871E-01 8.0735E-01 -8.1331E-01 5.9202E-01 -2.4200E-01 2.2672E-02 1.8353E-02 -5.2224E-03 S7 3.7560E-01 -8.1559E-01 1.3956E+00 -1.5302E+00 7.1881E-01 6.8857E-01 -1.3431E+00 8.6098E-01 -2.0790E-01 S8 -1.2570E-01 -6.6063E-02 4.2022E-02 2.1235E-01 -8.3694E-01 1.5393E+00 -1.5588E+00 8.3401E-01 -1.8683E-01 S9 -9.0525E-02 -3.4226E-02 1.3218E-01 -2.6731E-01 4.6434E-01 -5.1899E-01 3.5515E-01 -1.3660E-01 2.2457E-02 S10 1.2132E-02 -9.6289E-02 4.1527E-02 1.3422E-02 -3.0992E-02 2.1117E-02 -7.3389E-03 1.2853E-03 -8.9662E-05 S11 8.6256E-02 -1.5373E-01 9.8300E-02 -4.2740E-02 1.2783E-02 -2.7246E-03 5.1338E-04 -8.5271E-05 7.1378E-06 S12 -6.2862E-03 -6.8368E-02 9.6610E-02 -8.4581E-02 4.5165E-02 -1.4554E-02 2.7534E-03 -2.7957E-04 1.1677E-05 S13 -3.3085E-02 -4.4435E-02 5.5912E-02 -3.8691E-02 1.6025E-02 -3.8279E-03 4.8351E-04 -2.4998E-05 2.2327E-08

[0137] Table 12

[0138] Figure 12A Shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 6, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 12B Shows the astigmatism curve of the optical imaging lens of Embodiment 6, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C Shows the distortion curve of the optical imaging lens of Embodiment 6, which represents the distortion magnitude values corresponding to different image heights. According to Figures 12A to 12C It can be known that the optical imaging lens given in Embodiment 6 can achieve good imaging quality.

[0139] Example 7

[0140] The following refers to Figures 13 to 14C Describes the optical imaging lens according to Embodiment 7 of the present application. Figure 13Shows a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application.

[0141] As Figure 13 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: 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 S16.

[0142] The first lens E1 has a positive optical power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has a positive optical power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a negative optical power, its object side surface S6 is concave, and its image side surface S7 is convex. The fourth lens E4 has a positive optical power, its object side surface S8 is concave, and its image side surface S9 is concave. The fifth lens E5 has a negative optical power, its object side surface S10 is concave, and its image side surface S11 is concave. The sixth lens E6 has a positive optical power, its object side surface S12 is convex, and its image side surface S13 is concave. The filter E7 has an object side surface S14 and an image side surface S15. Light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0143] In the optical imaging lens of this embodiment, a diaphragm STO for restricting the aperture of the light beam can be provided between the object side and the first lens E1 to improve the imaging quality. Optionally, the optical imaging lens of this embodiment may further include a virtual spacer S5 disposed between the second lens E2 and the third lens E3.

[0144] Table 13 shows the basic parameter table of the optical imaging lens of Embodiment 7, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm). Table 14 shows the high-order term coefficients that can be used for each aspherical mirror surface in Embodiment 7, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0145]

[0146] Table 13

[0147]

[0148]

[0149] Table 14

[0150] Figure 14A Shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 7, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 14B Shows the astigmatism curve of the optical imaging lens of Embodiment 7, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 14CThe distortion curve of the optical imaging lens of Embodiment 7 is shown, which represents the distortion magnitude values corresponding to different image heights. According to Figures 14A to 14C it can be known that the optical imaging lens given in Embodiment 7 can achieve good imaging quality.

[0151] Example 8

[0152] The following refers to Figures 15 to 16C to describe the optical imaging lens according to Embodiment 8 of the present application. Figure 15 The structural schematic diagram of the optical imaging lens according to Embodiment 8 of the present application is shown.

[0153] As Figure 15 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: 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 S16.

[0154] The first lens E1 has a positive optical power, its object side surface S1 is a convex surface, and its image side surface S2 is a convex surface. The second lens E2 has a positive optical power, its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a negative optical power, its object side surface S6 is a concave surface, and its image side surface S7 is a concave surface. The fourth lens E4 has a positive optical power, its object side surface S8 is a convex surface, and its image side surface S9 is a concave surface. The fifth lens E5 has a negative optical power, its object side surface S10 is a convex surface, and its image side surface S11 is a concave surface. The sixth lens E6 has a negative optical power, its object side surface S12 is a convex surface, and its image side surface S13 is a concave surface. The filter E7 has an object side surface S14 and an image side surface S15. The light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0155] In the optical imaging lens of this embodiment, a diaphragm STO for limiting the aperture of the light beam can be provided between the object side and the first lens E1 to improve the imaging quality. Optionally, the optical imaging lens of this embodiment may further include a virtual spacer S5 disposed between the second lens E2 and the third lens E3.

[0156] Table 15 shows the basic parameter table of the optical imaging lens of Embodiment 8, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm). Table 16 shows the high-order term coefficients that can be used for each aspherical mirror surface in Embodiment 8, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0157]

[0158]

[0159] Table 15

[0160] Surface number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 6.9616E-02 -4.7527E-02 1.1776E-01 -2.1233E-01 2.4402E-01 -1.7511E-01 7.6060E-02 -1.8301E-02 1.8654E-03 S2 -4.1451E-01 1.6098E+00 -3.4885E+00 5.0071E+00 -4.8738E+00 3.1695E+00 -1.3120E+00 3.1065E-01 -3.1820E-02 S3 -4.1652E-01 1.5846E+00 -3.4780E+00 5.0019E+00 -4.8728E+00 3.1920E+00 -1.3417E+00 3.2498E-01 -3.4265E-02 S4 1.0147E-02 3.4711E-01 -1.1913E+00 1.9378E+00 -1.9083E+00 1.2466E+00 -5.4318E-01 1.4337E-01 -1.7152E-02 S6 3.4949E-01 -2.8231E-01 -4.0676E-01 1.6344E+00 -2.5877E+00 2.6783E+00 -1.8294E+00 7.3166E-01 -1.2792E-01 S7 3.7345E-01 -5.9242E-01 6.4086E-02 2.2775E+00 -6.5783E+00 1.0343E+01 -9.6829E+00 5.0425E+00 -1.1276E+00 S8 -4.9246E-02 -3.9916E-01 1.1630E+00 -3.1019E+00 5.9355E+00 -7.1203E+00 5.0641E+00 -1.9165E+00 2.7677E-01 S9 -4.7571E-02 -2.1259E-01 7.5575E-01 -2.0767E+00 4.2796E+00 -5.6061E+00 4.4310E+00 -1.9227E+00 3.4814E-01 S10 -9.8254E-02 4.2103E-02 -6.5044E-02 -2.0367E-02 1.2091E-01 -1.2384E-01 6.2073E-02 -1.5530E-02 1.5380E-03 S11 -1.1389E-01 1.2496E-01 -1.8383E-01 1.5918E-01 -8.5177E-02 2.7547E-02 -4.8004E-03 2.9629E-04 1.2332E-05 S12 -9.6367E-02 7.6964E-02 -4.4469E-02 1.8253E-02 -5.9595E-03 1.7486E-03 -3.9288E-04 5.1945E-05 -2.9065E-06 S13 -9.5980E-02 4.9461E-02 -2.7690E-02 1.2619E-02 -4.0244E-03 8.3915E-04 -9.7609E-05 4.3862E-06 3.9502E-08

[0161] Table 16

[0162] Figure 16A shows the axial chromatic aberration curve of the optical imaging lens of Example 8, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the lens. Figure 16B shows the astigmatism curve of the optical imaging lens of Example 8, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 16C shows the distortion curve of the optical imaging lens of Example 8, which represents the distortion magnitude values corresponding to different image heights. According to Figures 16A to 16C it can be seen that the optical imaging lens given in Example 8 can achieve good imaging quality.

[0163] Example 9

[0164] The following refers to Figures 17 to 18C describes the optical imaging lens according to Embodiment 9 of the present application. Figure 17 shows a schematic structural diagram of the optical imaging lens according to Embodiment 9 of the present application.

[0165] As Figure 17 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: 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 S16.

[0166] The first lens E1 has a positive optical power, its object side surface S1 is a convex surface, and its image side surface S2 is a convex surface. The second lens E2 has a positive optical power, its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a negative optical power, its object side surface S6 is a concave surface, and its image side surface S7 is a concave surface. The fourth lens E4 has a positive optical power, its object side surface S8 is a convex surface, and its image side surface S9 is a concave surface. The fifth lens E5 has a negative optical power, its object side surface S10 is a convex surface, and its image side surface S11 is a concave surface. The sixth lens E6 has a negative optical power, its object side surface S12 is a convex surface, and its image side surface S13 is a concave surface. The filter E7 has an object side surface S14 and an image side surface S15. Light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0167] In the optical imaging lens of this embodiment, a diaphragm STO for restricting the aperture of the light beam can be provided between the object side and the first lens E1 to improve the imaging quality. Optionally, the optical imaging lens of this embodiment may further include a virtual spacer S5 disposed between the second lens E2 and the third lens E3.

[0168] Table 17 shows the basic parameter table of the optical imaging lens of Example 9. Among them, the units of the radius of curvature, thickness, and focal length are all millimeters (mm). Table 18 shows the high-order term coefficients of each aspherical mirror surface that can be used in Example 9. Among them, each aspherical surface type can be defined by formula (1) given in the above Example 1.

[0169]

[0170]

[0171] Table 17

[0172] Surface number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 6.0097E-02 -3.0927E-02 5.2066E-02 -7.2993E-02 6.7871E-02 -3.9784E-02 1.4149E-02 -2.7857E-03 2.3183E-04 S2 -3.9095E-01 1.2237E+00 -2.1611E+00 2.5300E+00 -1.9999E+00 1.0493E+00 -3.4845E-01 6.5939E-02 -5.3865E-03 S3 -3.6966E-01 1.1497E+00 -2.0800E+00 2.4856E+00 -2.0107E+00 1.0861E+00 -3.7368E-01 7.3688E-02 -6.3063E-03 S4 6.6997E-02 6.0548E-02 -4.0918E-01 7.4223E-01 -7.8387E-01 5.3988E-01 -2.3893E-01 6.1090E-02 -6.7874E-03 S6 4.0560E-01 -6.9837E-01 9.1809E-01 -8.8144E-01 6.1853E-01 -2.5452E-01 2.8193E-02 1.7201E-02 -4.9736E-03 S7 3.4703E-01 -6.8601E-01 7.7796E-01 5.6111E-02 -1.8446E+00 3.3041E+00 -2.9579E+00 1.3946E+00 -2.7762E-01 S8 -9.5276E-02 -1.5515E-01 2.3925E-01 -2.1783E-01 -1.7833E-01 9.2196E-01 -1.2219E+00 7.3792E-01 -1.7796E-01 S9 -5.7206E-02 -7.3355E-02 1.5512E-01 -2.1878E-01 3.1253E-01 -3.0404E-01 1.9069E-01 -7.2496E-02 1.2447E-02 S10 -8.2360E-02 -8.9327E-03 3.6929E-03 6.7067E-03 -1.4837E-02 1.5838E-02 -8.2900E-03 2.1014E-03 -2.0709E-04 S11 -9.6084E-02 4.5590E-02 -5.3587E-02 4.7084E-02 -3.0466E-02 1.3198E-02 -3.5121E-03 5.1221E-04 -3.0743E-05 S12 -1.0558E-01 6.2523E-02 -3.6152E-02 1.6078E-02 -5.6877E-03 8.0739E-04 1.7939E-04 -6.8549E-05 5.7542E-06 S13 -8.6315E-02 3.1789E-02 -1.3920E-02 5.0492E-03 -1.5081E-03 2.8439E-04 -2.6163E-05 6.7573E-07 3.6387E-08

[0173] Table 18

[0174] Figure 18A shows the axial chromatic aberration curve of the optical imaging lens of Example 9, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 18B shows the astigmatism curve of the optical imaging lens of Example 9, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 18C shows the distortion curve of the optical imaging lens of Example 9, which represents the distortion magnitude values corresponding to different image heights. According to Figures 18A to 18C it can be seen that the optical imaging lens given in Example 9 can achieve good imaging quality.

[0175] In summary, Examples 1 to 9 respectively satisfy the relationships shown in Table 19.

[0176]

[0177]

[0178] Table 19

[0179] This application also provides an imaging device, and its electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0180] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. 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 the 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, a technical solution formed by mutually replacing the above features with technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. An optical imaging lens, characterized in that, It sequentially includes, from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, each having a focal power. The first lens has a positive focal power, its object side surface is convex, and its image side surface is convex. The second lens has a positive focal power, its object side surface is convex, and its image side surface is concave. The third lens has a negative focal power, and its object side surface is concave. The image side surface of the fourth lens is concave. The image side surface of the fifth lens is concave. The image side surface of the sixth lens is concave. The number of lenses with focal power in the optical imaging lens is six. The fourth lens has a positive focal power, the fifth lens has a negative focal power, and the sixth lens has a positive or negative focal power; or, the sixth lens has a negative focal power, and the signs of the focal powers of the fourth lens and the fifth lens are the same. The distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens satisfy 0.89 ≤ TTL / f < 1. And The effective focal length f2 of the second lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R9 of the object side surface of the fifth lens satisfy 1.98 ≤ f2 / (|R3 + R9|) < 4.

0.

2. The optical imaging lens according to claim 1, characterized in that, The curvature radius R2 of the image side surface of the first lens, the curvature radius R5 of the object side surface of the third lens, and the effective focal length f3 of the third lens satisfy 2.66 ≤ (R2 + R5) / f3 ≤ 10.

66.

3. The optical imaging lens according to claim 1, characterized in that, The maximum half field of view Semi - Fov of the optical imaging lens and the effective focal length f1 of the first lens satisfy 1.22 mm ≤ tan(Semi - Fov) × f1 ≤ 1.50 mm.

4. The optical imaging lens according to claim 1, characterized in that, The total effective focal length f of the optical imaging lens and the curvature radius R1 of the object side surface of the first lens satisfy 3.08 ≤ f / R1 ≤ 3.

83.

5. The optical imaging lens according to claim 1, characterized in that, The curvature radius R8 of the image side surface of the fourth lens, the curvature radius R10 of the image side surface of the fifth lens, and the total effective focal length f of the optical imaging lens satisfy 1.22 ≤ (R8 + R10) / f ≤ 1.

94.

6. The optical imaging lens according to claim 1, characterized in that, The central thickness CT1 of the first lens on the optical axis and the central thickness CT6 of the sixth lens on the optical axis satisfy 1.26 ≤ CT1 / CT6 ≤ 2.

51.

7. The optical imaging lens according to claim 1, characterized in that, The air gap T34 between the third lens and the fourth lens on the optical axis and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy 1.92 ≤ T45 / T34 ≤ 4.

21.

8. The optical imaging lens according to claim 1, characterized in that, The central thickness CT5 of the fifth lens on the optical axis and the air gap T56 between the fifth lens and the sixth lens on the optical axis satisfy 0.56 ≤ T56 / CT5 < 2.1.

Images