Optical imaging lens group

Abstract

The present application discloses an optical imaging lens group, which sequentially includes, from the object side to the image side along the optical axis: a first lens with negative optical power; a second lens with optical power; a third lens with negative optical power; a fourth lens with optical power; a fifth lens with negative optical power, whose object side is concave; and a sixth lens with optical power, whose object side is convex. The maximum field of view FOV of the optical imaging lens group satisfies: 92° < FOV < 116°. Half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens group, the total effective focal length f of the optical imaging lens group, and the entrance pupil diameter EPD of the optical imaging lens group satisfy: ImgH × EPD / f < 1 mm.

Description

Technical Field

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

[0002] In recent years, with the rapid development of electronic products, portable and wearable electronic products such as smart phones and smart watches have quickly become popular. Currently, electronic products such as smart phones and smart watches have become necessities in users' daily lives. At the same time, in order to improve the competitiveness of their own products, many suppliers of electronic products have invested a lot of time and energy in product innovation. Among them, improving the imaging quality of portable and wearable electronic products has become the core competitiveness of many suppliers. Summary of the Invention

[0003] The present application provides such an optical imaging lens group, which sequentially includes, along the optical axis from the object side to the image side: a first lens with negative optical power; a second lens with optical power; a third lens with negative optical power; a fourth lens with optical power; a fifth lens with negative optical power, whose object side is concave; and a sixth lens with optical power, whose object side is convex. The maximum field of view FOV of the optical imaging lens group can satisfy: 92° < FOV < 116°; and half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens group, the total effective focal length f of the optical imaging lens group, and the entrance pupil diameter EPD of the optical imaging lens group can satisfy: ImgH × EPD / f < 1 mm.

[0004] In one embodiment, at least one of the object side of the first lens to the image side of the sixth lens is an aspherical mirror surface.

[0005] In one embodiment, the effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens group can satisfy: -1.5 < f / f5 < 0.

[0006] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens can satisfy: 0 < f3 / (f1 + f3) < 1.0.

[0007] In one embodiment, the total effective focal length f of the optical imaging lens group and the effective focal length f2 of the second lens can satisfy: 0.3 < f / f2 < 1.3.

[0008] In one embodiment, the maximum effective radius DT12 of the image side of the first lens and the radius of curvature R2 of the image side of the first lens can satisfy: 0 < DT12 / R2 < 1.0.

[0009] In one embodiment, the distance SAG12 from the intersection of the image side surface of the first lens and the optical axis to the vertex of the effective radius of the image side surface of the first lens on the optical axis and the distance SAG51 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 on the optical axis satisfy: 0.3 < SAG51 / (SAG51 - SAG12) < 0.8.

[0010] In one embodiment, the maximum effective radius DT42 of the image side surface of the fourth lens and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy: 0.5 < DT42 / DT61 < 1.0.

[0011] In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 0.2 < ET4 / CT4 < 0.7.

[0012] In one embodiment, the edge thickness ET5 of the fifth lens and the maximum effective radius DT51 of the object side surface of the fifth lens satisfy: 0.2 < ET5 / DT51 < 1.0.

[0013] In one embodiment, the radius of curvature R8 of the image side surface of the fourth lens and the effective focal length f4 of the fourth lens satisfy: -1.5 < R8 / f4 < 0.

[0014] In one embodiment, the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens satisfy: 0.5 < R2 / R3 < 1.5.

[0015] In one embodiment, the radius of curvature R8 of the image side surface of the fourth lens and the radius of curvature R9 of the object side surface of the fifth lens satisfy: 0 < R8 / R9 < 1.0.

[0016] In one embodiment, the radius of curvature R11 of the object side surface of the sixth lens and the radius of curvature R12 of the image side surface of the sixth lens satisfy: 0.3 < R12 / R11 < 1.3.

[0017] In one embodiment, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT5 of the fifth lens on the optical axis satisfy: 0.2 < CT2 / (CT1 + CT3 + CT5) < 1.0.

[0018] In one embodiment, the optical imaging lens group further includes a diaphragm, and the distance SD from the diaphragm to the image side surface of the sixth lens on the optical axis and the distance TD from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis satisfy: 0.5 < SD / TD < 1.0.

[0019] On the other hand, the present application provides an optical imaging lens group which, along the optical axis, sequentially includes from the object side to the image side: a first lens with negative optical power; a second lens with optical power; a third lens with negative optical power; a fourth lens with optical power; a fifth lens with negative optical power, whose object side is concave; and a sixth lens with optical power, whose object side is convex. The maximum field of view FOV of the optical imaging lens group can satisfy: 92° < FOV < 116°. The distance SAG12 on the optical axis from the intersection of the image side of the first lens and the optical axis to the vertex of the effective radius of the image side of the first lens and the distance SAG51 on the optical axis from the intersection of the object side of the fifth lens and the optical axis to the vertex of the effective radius of the object side of the fifth lens can satisfy: 0.3 < SAG51 / (SAG51 - SAG12) < 0.8.

[0020] In one embodiment, the effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens group can satisfy: -1.5 < f / f5 < 0.

[0021] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens can satisfy: 0 < f3 / (f1 + f3) < 1.0.

[0022] In one embodiment, the total effective focal length f of the optical imaging lens group and the effective focal length f2 of the second lens can satisfy: 0.3 < f / f2 < 1.3.

[0023] In one embodiment, the maximum effective radius DT12 of the image side of the first lens and the radius of curvature R2 of the image side of the first lens can satisfy: 0 < DT12 / R2 < 1.0.

[0024] In one embodiment, the maximum effective radius DT42 of the image side of the fourth lens and the maximum effective radius DT61 of the object side of the sixth lens can satisfy: 0.5 < DT42 / DT61 < 1.0.

[0025] In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens can satisfy: 0.2 < ET4 / CT4 < 0.7.

[0026] In one embodiment, the edge thickness ET5 of the fifth lens and the maximum effective radius DT51 of the object side of the fifth lens can satisfy: 0.2 < ET5 / DT51 < 1.0.

[0027] In one embodiment, the radius of curvature R8 of the image side of the fourth lens and the effective focal length f4 of the fourth lens can satisfy: -1.5 < R8 / f4 < 0.

[0028] In one embodiment, the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens may satisfy: 0.5 < R2 / R3 < 1.5.

[0029] In one embodiment, the radius of curvature R8 of the image side surface of the fourth lens and the radius of curvature R9 of the object side surface of the fifth lens may satisfy: 0 < R8 / R9 < 1.0.

[0030] In one embodiment, the radius of curvature R11 of the object side surface of the sixth lens and the radius of curvature R12 of the image side surface of the sixth lens may satisfy: 0.3 < R12 / R11 < 1.3.

[0031] In one embodiment, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 0.2 < CT2 / (CT1 + CT3 + CT5) < 1.0.

[0032] In one embodiment, the optical imaging lens group further includes a diaphragm, and the distance SD on the optical axis from the diaphragm to the image side surface of the sixth lens and the distance TD on the optical axis from the object side surface of the first lens to the image side surface of the sixth lens may satisfy: 0.5 < SD / TD < 1.0.

[0033] In one embodiment, half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens group, the total effective focal length f of the optical imaging lens group, and the entrance pupil diameter EPD of the optical imaging lens group may satisfy: ImgH × EPD / f < 1 mm.

[0034] This application uses multiple (for example, six) lenses. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the above optical imaging lens group has at least one beneficial effect such as a large field of view angle, miniaturization, and high imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objectives, and advantages of this application will become more apparent:

[0036] Figure 1 FIG. shows a schematic structural diagram of an optical imaging lens group according to Embodiment 1 of this application;

[0037] Figures 2A to 2D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens group of Embodiment 1;

[0038] Figure 3Shows a schematic structural diagram of an optical imaging lens group according to Embodiment 2 of the present application;

[0039] Figures 4A to 4D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and longitudinal chromatic aberration curve of the optical imaging lens group of Embodiment 2;

[0040] Figure 5 Shows a schematic structural diagram of an optical imaging lens group according to Embodiment 3 of the present application;

[0041] Figures 6A to 6D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and longitudinal chromatic aberration curve of the optical imaging lens group of Embodiment 3;

[0042] Figure 7 Shows a schematic structural diagram of an optical imaging lens group according to Embodiment 4 of the present application;

[0043] Figures 8A to 8D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and longitudinal chromatic aberration curve of the optical imaging lens group of Embodiment 4;

[0044] Figure 9 Shows a schematic structural diagram of an optical imaging lens group according to Embodiment 5 of the present application;

[0045] Figures 10A to 10D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and longitudinal chromatic aberration curve of the optical imaging lens group of Embodiment 5;

[0046] Figure 11 Shows a schematic structural diagram of an optical imaging lens group according to Embodiment 6 of the present application; and

[0047] Figures 12A to 12D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and longitudinal chromatic aberration curve of the optical imaging lens group of Embodiment 6. Detailed implementation manners

[0048] 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.

[0049] It should be noted that in this specification, the expressions such as first, second, third, etc. are only used to distinguish one feature from another, and do not represent any limitation on the features. 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.

[0050] In the drawings, for the sake of clarity, the thickness, dimensions, and shape of the lenses 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 for illustrative purposes only and are not drawn to an exact scale.

[0051] In this document, 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 being 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.

[0052] It should also be understood that the terms "comprises," "comprising," "has," "including," and / or "including having," 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 and not the individual elements in the list. Further, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0053] 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 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.

[0054] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0055] The features, principles, and other aspects of the present application are described in detail below.

[0056] The optical imaging lens group according to an exemplary embodiment of the present application may include six lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. These six lenses are arranged in sequence along the optical axis from the object side to the image side. There may be a spacing distance between any two adjacent lenses among the first lens to the sixth lens.

[0057] In the exemplary embodiment, the first lens may have a negative optical power; the second lens may have a positive optical power or a negative optical power; the third lens may have a negative optical power; the fourth lens may have a positive optical power or a negative optical power; the fifth lens may have a negative optical power, and its object side surface may be concave; and the sixth lens may have a positive optical power or a negative optical power, and its object side surface may be convex. By reasonably setting the optical power and surface type characteristics of each lens, it is beneficial to balance and correct various aberrations of the optical imaging lens group, and it is beneficial to improve the imaging quality of the optical imaging lens group.

[0058] In the exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 92° < FOV < 116°, where FOV is the maximum field of view angle of the optical imaging lens group. More specifically, FOV may further satisfy: 104° < FOV < 113°. Satisfying 92° < FOV < 116° is beneficial to achieve the wide-angle characteristic and is beneficial to increasing the imaging range on the imaging surface.

[0059] In the exemplary embodiment, the optical imaging lens group according to the present application may satisfy: ImgH × EPD / f < 1 mm, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group, f is the total effective focal length of the optical imaging lens group, and EPD is the entrance pupil diameter of the optical imaging lens group. More specifically, ImgH, EPD, and f may further satisfy: ImgH × EPD / f < 0.9 mm. Satisfying ImgH × EPD / f < 1 mm is beneficial to achieve miniaturization.

[0060] In the exemplary embodiment, the optical imaging lens group according to the present application may satisfy: -1.5 < f / f5 < 0, where f5 is the effective focal length of the fifth lens, and f is the total effective focal length of the optical imaging lens group. More specifically, f and f5 may further satisfy: -1.0 < f / f5 < -0.3. Satisfying -1.5 < f / f5 < 0 is beneficial to reducing the lateral chromatic aberration of the lens group.

[0061] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0 < f3 / (f1 + f3) < 1.0, where f1 is the effective focal length of the first lens and f3 is the effective focal length of the third lens. More specifically, f1 and f3 may further satisfy: 0.5 < f3 / (f1 + f3) < 0.9. Satisfying 0 < f3 / (f1 + f3) < 1.0 is beneficial to reducing the axial chromatic aberration of the lens group and improving the imaging performance of the optical imaging lens group.

[0062] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3 < f / f2 < 1.3, where f is the total effective focal length of the optical imaging lens group and f2 is the effective focal length of the second lens. More specifically, f and f2 may further satisfy: 0.4 < f / f2 < 1.2. Satisfying 0.3 < f / f2 < 1.3 is beneficial to reducing the lateral chromatic aberration of the lens group and, at the same time, helps with the miniaturized design of the lens group.

[0063] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0 < DT12 / R2 < 1.0, where DT12 is the maximum effective radius of the image side of the first lens and R2 is the curvature radius of the image side of the first lens. More specifically, DT12 and R2 may further satisfy: 0.2 < DT12 / R2 < 0.7. Satisfying 0 < DT12 / R2 < 1.0 is beneficial to the production and processing of the lens group and, at the same time, is also beneficial to reducing the off-axis field curvature of the lens group.

[0064] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3 < SAG51 / (SAG51 - SAG12) < 0.8, where SAG12 is the distance from the intersection of the image side of the first lens and the optical axis to the vertex of the effective radius of the image side of the first lens on the optical axis, and SAG51 is the distance from the intersection of the object side of the fifth lens and the optical axis to the vertex of the effective radius of the object side of the fifth lens on the optical axis. More specifically, SAG51 and SAG12 may further satisfy: 0.3 < SAG51 / (SAG51 - SAG12) < 0.7. Satisfying 0.3 < SAG51 / (SAG51 - SAG12) < 0.8 is beneficial to improving the processability and imaging quality of the lens group. If SAG51 / (SAG51 - SAG12) > 0.8, it is likely to result in poor processability; if SAG51 / (SAG51 - SAG12) < 0.3, it is not conducive to correcting the field curvature of the off-axis field of view.

[0065] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.5 < DT42 / DT61 < 1.0, where DT42 is the maximum effective radius of the image side of the fourth lens, and DT61 is the maximum effective radius of the object side of the sixth lens. More specifically, DT42 and DT61 may further satisfy: 0.6 < DT42 / DT61 < 0.9. Satisfying 0.5 < DT42 / DT61 < 1.0 is beneficial to both limiting the size of the lens group and meeting the processing manufacturability requirements of the lens group.

[0066] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.2 < ET4 / CT4 < 0.7, where CT4 is the central thickness of the fourth lens on the optical axis, and ET4 is the edge thickness of the fourth lens. More specifically, ET4 and CT4 may further satisfy: 0.2 < ET4 / CT4 < 0.5. Satisfying 0.2 < ET4 / CT4 < 0.7 can not only ensure the processing manufacturability requirements of the lens group but also reduce the monochromatic aberration of the lens group.

[0067] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.2 < ET5 / DT51 < 1.0, where ET5 is the edge thickness of the fifth lens, and DT51 is the maximum effective radius of the object side of the fifth lens. More specifically, ET5 and DT51 may further satisfy: 0.4 < ET5 / DT51 < 0.8. Satisfying 0.2 < ET5 / DT51 < 1.0 can not only ensure the processing manufacturability requirements of the lens group but also reduce the influence of ghost images.

[0068] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: -1.5 < R8 / f4 < 0, where R8 is the curvature radius of the image side of the fourth lens, and f4 is the effective focal length of the fourth lens. More specifically, R8 and f4 may further satisfy: -1.0 < R8 / f4 < -0.7. Satisfying -1.5 < R8 / f4 < 0 is beneficial to reducing the axial chromatic aberration.

[0069] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.5 < R2 / R3 < 1.5, where R2 is the curvature radius of the image side of the first lens, and R3 is the curvature radius of the object side of the second lens. More specifically, R2 and R3 may further satisfy: 0.5 < R2 / R3 < 1.2. Satisfying 0.5 < R2 / R3 < 1.5 is beneficial to reducing spherical aberration.

[0070] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0 < R8 / R9 < 1.0, where R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens. More specifically, R8 and R9 may further satisfy: 0.1 < R8 / R9 < 0.7. Satisfying 0 < R8 / R9 < 1.0 is beneficial for correcting field curvature and reducing the influence of ghost images.

[0071] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3 < R12 / R11 < 1.3, where R11 is the radius of curvature of the object side of the sixth lens, and R12 is the radius of curvature of the image side of the sixth lens. More specifically, R12 and R11 may further satisfy: 0.5 < R12 / R11 < 1.0. Satisfying 0.3 < R12 / R11 < 1.3 can both achieve miniaturization and correct field curvature.

[0072] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.2 < CT2 / (CT1 + CT3 + CT5) < 1.0, where CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, CT3 is the central thickness of the third lens on the optical axis, and CT5 is the central thickness of the fifth lens on the optical axis. More specifically, CT2, CT1, CT3, and CT5 may further satisfy: 0.3 < CT2 / (CT1 + CT3 + CT5) < 0.8. Satisfying 0.2 < CT2 / (CT1 + CT3 + CT5) < 1.0 is beneficial for ensuring the processability of the lens group and for reducing the lateral chromatic aberration and axial chromatic aberration of the lens group.

[0073] In an exemplary embodiment, the optical imaging lens group further includes a diaphragm. The optical imaging lens group according to the present application may satisfy: 0.5 < SD / TD < 1.0, where SD is the distance from the diaphragm to the image side of the sixth lens on the optical axis, and TD is the distance from the object side of the first lens to the image side of the sixth lens on the optical axis. More specifically, SD and TD may further satisfy: 0.7 < SD / TD < 0.9. Satisfying 0.5 < SD / TD < 1.0 is both beneficial for reducing astigmatism and for making the lens group have a smaller overall optical length.

[0074] In an exemplary embodiment, the optical imaging lens group according to the present application further includes a diaphragm disposed between the first lens and the second lens. Optionally, the above optical imaging lens group may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0075] The optical imaging lens group according to the above-described embodiments 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 on-axis spacing between each lens, etc., the volume of the optical imaging lens group can be effectively reduced and the processability of the optical imaging lens group can be improved, making the optical imaging lens group more conducive to production and processing and applicable to portable electronic products. The optical imaging lens group configured as described above may have characteristics such as ultra-wide angle, miniaturization, and good imaging quality.

[0076] In an embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object side surface of the first lens to the image side surface of the sixth lens is an aspherical mirror surface. The characteristic of 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, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and improving 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, 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 mirror surface. 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 mirror surfaces.

[0077] 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 group 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 group is not limited to including six lenses. If necessary, the optical imaging lens group may also include other numbers of lenses.

[0078] The following further describes specific embodiments of the optical imaging lens group applicable to the above-described embodiments with reference to the accompanying drawings.

[0079] Example 1

[0080] The following refers to Figures 1 to 2D Describe the optical imaging lens group according to Embodiment 1 of the present application. Figure 1 The structural schematic diagram of the optical imaging lens group according to Embodiment 1 of the present application is shown.

[0081] As Figure 1As shown, the optical imaging lens group sequentially includes, from the object side to the image side: a first lens E1, a stop STO, 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.

[0082] The first lens E1 has a negative focal power. Its object surface S1 is concave, and its image surface S2 is concave. The second lens E2 has a positive focal power. Its object surface S3 is convex, and its image surface S4 is concave. The third lens E3 has a negative focal power. Its object surface S5 is convex, and its image surface S6 is concave. The fourth lens E4 has a positive focal power. Its object surface S7 is convex, and its image surface S8 is convex. The fifth lens E5 has a negative focal power. Its object surface S9 is concave, and its image surface S10 is concave. The sixth lens E6 has a negative focal power. Its object surface S11 is convex, and its image surface S12 is concave. The filter E7 has an object surface S13 and an image surface S14. Light from the object sequentially passes through the surfaces S1 to S14 and finally forms an image on the imaging surface S15.

[0083] Table 1 shows the basic parameter table of the optical imaging lens group of Example 1, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0084]

[0085] Table 1

[0086] In this example, the total effective focal length f of the optical imaging lens group is 1.80 mm. The total length TTL of the optical imaging lens group (i.e., the distance on the optical axis from the object surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens group) is 4.00 mm. Half of the diagonal length ImgH of the effective pixel region on the imaging surface S15 of the optical imaging lens group is 1.81 mm. The ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.08. The maximum field of view FOV of the optical imaging lens group is 105.0°.

[0087] In Example 1, the object surface and the image surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. The surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0088]

[0089] Wherein, 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 of 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 coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A 10 , A 12 , A 14 , and A 16 .

[0090] Plane number A4 A6 A8 A10 A12 A14 A16 S1 7.7747E-01 -1.7731E+00 4.5300E+00 -1.0388E+01 1.6144E+01 -1.4271E+01 5.3862E+00 S2 1.1910E+00 -2.6945E+00 1.7573E+01 -1.0960E+02 4.6058E+02 -1.0665E+03 1.0278E+03 S3 1.4690E-01 6.0499E-01 -1.5051E+01 1.2801E+02 -6.1215E+02 1.5172E+03 -1.5103E+03 S4 -3.9058E-01 -6.3239E-01 4.7100E+00 -2.4821E+01 8.1457E+01 -1.4731E+02 1.2139E+02 S5 -5.7857E-01 -1.6365E+00 1.0815E+01 -6.1321E+01 2.1341E+02 -3.7745E+02 2.7591E+02 S6 -3.6154E-01 4.5116E-01 -1.4900E+00 3.7586E+00 -6.0426E+00 8.3389E+00 -4.5535E+00 S7 -3.3081E-01 1.3358E+00 -3.6588E+00 7.1695E+00 -1.1305E+01 1.2047E+01 -5.6013E+00 S8 -3.2198E-01 1.1772E+00 -2.4669E+00 3.7624E+00 -3.2469E+00 9.5898E-01 2.0144E-01 S9 3.1540E-01 -1.1292E+00 2.7505E+00 -5.5397E+00 7.6779E+00 -6.5365E+00 2.3984E+00 S10 5.0326E-01 -1.5081E+00 2.3731E+00 -2.3993E+00 1.4891E+00 -5.0732E-01 7.1965E-02 S11 -1.0291E+00 1.0676E+00 -1.0891E+00 8.7966E-01 -4.2390E-01 1.0698E-01 -1.1037E-02 S12 -5.1896E-01 5.6669E-01 -5.1541E-01 3.3386E-01 -1.4262E-01 3.5466E-02 -3.7931E-03

[0091] Table 2

[0092] Figure 2A shows the axial chromatic aberration curve of the optical imaging lens group 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 group of Example 1, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 2C shows the distortion curve of the optical imaging lens group of Example 1, which represents the distortion magnitude values corresponding to different field angles. Figure 2D shows the longitudinal chromatic aberration curve of the optical imaging lens group of Example 1, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 2A to 2D it can be seen that the optical imaging lens group given in Example 1 can achieve good imaging quality.

[0093] Example 2

[0094] The following will refer to Figures 3 to 4D to describe the optical imaging lens group 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 group according to Embodiment 2 of the present application.

[0095] As Figure 3 shown, the optical imaging lens group sequentially includes, from the object side to the image side: a first lens E1, a stop STO, 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 a negative optical power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is convex. The third lens E3 has a negative optical power, its object side S5 is concave, and its image side S6 is convex. The fourth lens E4 has a positive optical power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a negative optical power, its object side S9 is concave, and its image side S10 is concave. The sixth lens E6 has a negative optical power, its object side S11 is convex, and its image side S12 is concave. The filter E7 has an object side S13 and an image side S14. Light from the object sequentially passes through the surfaces S1 to S14 and finally forms an image on the imaging surface S15.

[0097] In this example, the total effective focal length f of the optical imaging lens group is 1.75 mm, the total length TTL of the optical imaging lens group is 3.98 mm, half of the diagonal length of the effective pixel region on the imaging surface S15 of the optical imaging lens group is ImgH = 1.85 mm, the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.20, and the maximum field of view angle FOV of the optical imaging lens group is 112.0°.

[0098] Table 3 shows the basic parameter table of the optical imaging lens group of Example 2, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 4 shows the high-order term coefficients of the aspherical mirror surfaces that can be used in Example 2, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0099]

[0100] Table 3

[0101]

[0102]

[0103] Table 4

[0104] Figure 4A Shows the axial chromatic aberration curve of the optical imaging lens group of Example 2, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 4B Shows the astigmatism curve of the optical imaging lens group of Example 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 group of Example 2, which represents the distortion magnitude values corresponding to different field of view angles. Figure 4D Shows the lateral chromatic aberration curve of the optical imaging lens group of Example 2, which represents the deviation of different image heights on the imaging surface after the light rays pass through the lens. According to Figures 4A to 4DIt can be seen that the optical imaging lens group given in Embodiment 2 can achieve good imaging quality.

[0105] Example 3

[0106] The following refers to Figures 5 to 6D and describes the optical imaging lens group according to Embodiment 3 of the present application. Figure 5 Fig. shows a schematic structural diagram of the optical imaging lens group according to Embodiment 3 of the present application.

[0107] As Figure 5 shown, the optical imaging lens group sequentially includes, from the object side to the image side: a first lens E1, a stop STO, 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.

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

[0109] In this example, the total effective focal length f of the optical imaging lens group is 1.86 mm, the total length TTL of the optical imaging lens group is 4.10 mm, half of the diagonal length of the effective pixel region on the imaging surface S15 of the optical imaging lens group is ImgH = 1.85 mm, the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.25, and the maximum field of view FOV of the optical imaging lens group is 110.0°.

[0110] Table 5 shows the basic parameter table of the optical imaging lens group of Embodiment 3, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 6 shows the high-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 3, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0111]

[0112]

[0113] Table 5

[0114] Plane number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 4.9099E-01 -8.3180E-01 1.1823E+00 -1.3561E+00 1.0581E+00 -4.6290E-01 8.9152E-02 4.9099E-01 -8.3180E-01 S2 7.5746E-01 -9.0734E-01 3.5042E+00 -1.7770E+01 8.3955E+01 -2.1433E+02 2.3441E+02 7.5746E-01 -9.0734E-01 S3 6.6725E-02 1.0576E+00 -2.3965E+01 2.0038E+02 -9.5947E+02 2.4125E+03 -2.5326E+03 6.6725E-02 1.0576E+00 S4 -2.7110E-01 -4.8767E-01 3.0271E+00 -2.3087E+01 8.0401E+01 -1.3052E+02 5.2922E+01 -2.7110E-01 -4.8767E-01 S5 -3.0851E-01 -1.3065E+00 4.5839E+00 -1.2785E+01 2.0242E+01 -2.2561E+00 -1.4670E+01 -3.0851E-01 -1.3065E+00 S6 -1.1288E-01 -5.8434E-01 1.7157E+00 -3.1982E+00 4.4253E+00 -2.7792E+00 5.3644E-01 -1.1288E-01 -5.8434E-01 S7 -1.8121E-01 6.1869E-01 -1.8154E+00 4.2619E+00 -6.3781E+00 5.0014E+00 -1.5489E+00 -1.8121E-01 6.1869E-01 S8 -5.0879E-01 1.4354E+00 -2.6891E+00 3.4159E+00 -1.7774E+00 -4.7854E-01 5.7331E-01 -5.0879E-01 1.4354E+00 S9 1.9835E-01 -7.5079E-01 1.3429E+00 -1.3302E+00 7.7644E-01 -3.9330E-01 1.0841E-01 1.9835E-01 -7.5079E-01 S10 4.4953E-01 -1.1929E+00 1.7222E+00 -1.4798E+00 7.6008E-01 -2.1749E-01 2.6764E-02 4.4953E-01 -1.1929E+00 S11 -8.1408E-01 6.8110E-01 -5.8576E-01 4.3336E-01 -1.9649E-01 4.6686E-02 -4.4925E-03 -8.1408E-01 6.8110E-01 S12 -3.7484E-01 2.6634E-01 -1.4637E-01 5.6940E-02 -1.5960E-02 2.8240E-03 -2.2676E-04 -3.7484E-01 2.6634E-01

[0115] Table 6

[0116] Figure 6A shows the axial chromatic aberration curve of the optical imaging lens group of Embodiment 3, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 6B shows the astigmatism curve of the optical imaging lens group of Embodiment 3, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6C shows the distortion curve of the optical imaging lens group of Embodiment 3, which represents the distortion magnitude values corresponding to different field angles. Figure 6D shows the lateral chromatic aberration curve of the optical imaging lens group of Embodiment 3, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 6A to 6D it can be known that the optical imaging lens group given in Embodiment 3 can achieve good imaging quality.

[0117] Example 4

[0118] The following refers to Figures 7 to 8D describes the optical imaging lens group according to Embodiment 4 of the present application. Figure 7 shows the structural schematic diagram of the optical imaging lens group according to Embodiment 4 of the present application.

[0119] As Figure 7 shown, the optical imaging lens group sequentially includes, from the object side to the image side: a first lens E1, a stop STO, 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.

[0120] The first lens E1 has a negative focal power, its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface. The second lens E2 has a positive focal power, its object side surface S3 is a convex surface, and its image side surface S4 is a convex surface. The third lens E3 has a negative focal power, its object side surface S5 is a convex surface, and its image side surface S6 is a concave surface. The fourth lens E4 has a positive focal power, its object side surface S7 is a convex surface, and its image side surface S8 is a convex surface. The fifth lens E5 has a negative focal power, its object side surface S9 is a concave surface, and its image side surface S10 is a concave surface. The sixth lens E6 has a negative focal power, its object side surface S11 is a convex surface, and its image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through each surface S1 to S14 and finally forms an image on the imaging surface S15.

[0121] In this example, the total effective focal length f of the optical imaging lens group is 1.81 mm, the total length TTL of the optical imaging lens group is 4.10 mm, half of the diagonal length ImgH of the effective pixel region on the imaging surface S15 of the optical imaging lens group is 1.82 mm, the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.20, and the maximum field of view angle FOV of the optical imaging lens group is 106.0°.

[0122] Table 7 shows the basic parameter table of the optical imaging lens group of Example 4, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 8 shows the higher-order term coefficients of the aspherical mirror surfaces that can be used in Example 4, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0123]

[0124] Table 7

[0125]

[0126]

[0127] Table 8

[0128] Figure 8A Shows the axial chromatic aberration curve of the optical imaging lens group 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 group 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 group of Example 4, which represents the distortion magnitude values corresponding to different field of view angles. Figure 8D Shows the lateral chromatic aberration curve of the optical imaging lens group of Example 4, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens. According to Figures 8A to 8D It can be seen that the optical imaging lens group given in Example 4 can achieve good imaging quality.

[0129] Example 5

[0130] The following refers to Figures 9 to 10D describes the optical imaging lens group according to Embodiment 5 of the present application. Figure 9 Shows the structural schematic diagram of the optical imaging lens group according to Embodiment 5 of the present application.

[0131] As Figure 9As shown, the optical imaging lens group sequentially includes, from the object side to the image side: a first lens E1, a stop STO, 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.

[0132] The first lens E1 has a negative optical power. Its object surface S1 is convex, and its image surface S2 is concave. The second lens E2 has a positive optical power. Its object surface S3 is convex, and its image surface S4 is convex. The third lens E3 has a negative optical power. Its object surface S5 is convex, and its image surface S6 is concave. The fourth lens E4 has a positive optical power. Its object surface S7 is convex, and its image surface S8 is convex. The fifth lens E5 has a negative optical power. Its object surface S9 is concave, and its image surface S10 is convex. The sixth lens E6 has a negative optical power. Its object surface S11 is convex, and its image surface S12 is concave. The filter E7 has an object surface S13 and an image surface S14. Light from the object sequentially passes through the surfaces S1 to S14 and finally forms an image on the imaging surface S15.

[0133] In this example, the total effective focal length f of the optical imaging lens group is 1.66 mm, the total length TTL of the optical imaging lens group is 4.29 mm, half of the diagonal length of the effective pixel region on the imaging surface S15 of the optical imaging lens group is ImgH = 1.82 mm, the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.20, and the maximum field of view FOV of the optical imaging lens group is 110.0°.

[0134] Table 9 shows the basic parameter table of the optical imaging lens group of Example 5, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 10 shows the high-order term coefficients of the aspherical mirror surfaces that can be used in Example 5, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0135]

[0136] Table 9

[0137] Plane number A4 A6 A8 A10 A12 A14 A16 S1 4.7016E-01 -4.6297E-01 5.9546E-01 -4.0313E-01 1.9662E-02 1.7843E-01 -1.0425E-01 S2 9.2868E-01 -6.7775E-01 1.0822E+01 -7.4929E+01 3.6375E+02 -8.8244E+02 9.1652E+02 S3 3.6264E-02 -1.0573E+00 1.3026E+01 -1.0860E+02 4.7481E+02 -1.0741E+03 9.3299E+02 S4 -6.4272E-01 2.6450E-01 -6.5121E-01 4.9504E+00 -4.4504E+01 1.4311E+02 -1.7244E+02 S5 -6.6686E-01 2.7957E-01 -1.4465E+00 9.8959E+00 -4.3086E+01 9.0270E+01 -7.0673E+01 S6 -4.6691E-01 8.5863E-01 -2.3844E+00 6.5823E+00 -1.1894E+01 1.2028E+01 -4.9982E+00 S7 -2.7275E-01 7.3041E-01 -1.9035E+00 3.5134E+00 -4.3177E+00 2.9981E+00 -8.8976E-01 S8 5.4403E-02 2.9408E-01 -1.1810E+00 1.8470E+00 -1.4534E+00 5.4085E-01 -8.3147E-02 S9 4.9210E-01 -1.2627E+00 7.9409E-01 -1.7836E-01 -2.7463E-01 2.5596E-01 0.0000E+00 S10 6.1977E-01 -1.7398E+00 2.0477E+00 -1.4071E+00 5.7523E-01 -1.3519E-01 1.5051E-02 S11 -7.4282E-01 4.2242E-01 -2.8951E-01 5.0654E-01 -4.7076E-01 1.8740E-01 -2.7359E-02 S12 -5.0853E-01 5.0095E-01 -3.3702E-01 1.4741E-01 -3.9092E-02 4.5221E-03 0.0000E+00

[0138] Table 10

[0139] Figure 10A Shows the axial chromatic aberration curve of the optical imaging lens group of Example 5, which represents the deviation of the focusing points of light rays of different wavelengths after passing through the lens. Figure 10B Shows the astigmatism curve of the optical imaging lens group 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 group of Example 5, which represents the distortion magnitude values corresponding to different field of view angles.Figure 10D The chromatic aberration of magnification curve of the optical imaging lens group of Embodiment 5 is shown, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to Figures 10A to 10D it can be seen that the optical imaging lens group given in Embodiment 5 can achieve good imaging quality.

[0140] Example 6

[0141] The following is a reference to Figures 11 to 12D description of the optical imaging lens group according to Embodiment 6 of the present application. Figure 11 The structural schematic diagram of the optical imaging lens group according to Embodiment 6 of the present application is shown.

[0142] As Figure 11 shown, the optical imaging lens group sequentially includes, from the object side to the image side: a first lens E1, a stop STO, 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.

[0143] The first lens E1 has a negative optical power, its object surface S1 is concave, and its image surface S2 is concave. 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 S5 is convex, and its image surface S6 is concave. The fourth lens E4 has a positive optical power, its object surface S7 is convex, and its image surface S8 is convex. The fifth lens E5 has a negative optical power, its object surface S9 is concave, and its image surface S10 is concave. The sixth lens E6 has a positive optical power, its object surface S11 is convex, and its image surface S12 is concave. The filter E7 has an object surface S13 and an image surface S14. Light from the object sequentially passes through the surfaces S1 to S14 and finally forms an image on the imaging surface S15.

[0144] In this example, the total effective focal length f of the optical imaging lens group is 1.56 mm, the total length TTL of the optical imaging lens group is 4.41 mm, half of the diagonal length of the effective pixel region on the imaging surface S15 of the optical imaging lens group is ImgH = 1.72 mm, the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.30, and the maximum field of view FOV of the optical imaging lens group is 104.9°.

[0145] Table 11 shows the basic parameter table of the optical imaging lens group of Embodiment 6, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 12 shows the high-order term coefficients that can be used for each aspherical mirror surface in Embodiment 6, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0146]

[0147] Table 11

[0148] Plane number A4 A6 A8 A10 A12 A14 A16 S1 5.6505E-01 -7.0949E-01 9.0359E-01 -6.9133E-01 1.9458E-01 1.0076E-01 -6.3413E-02 S2 9.0466E-01 -2.7660E-01 2.2465E+00 -1.7383E+01 1.1100E+02 -2.9182E+02 3.0689E+02 S3 -1.6669E-02 1.4405E-02 -2.1830E+00 3.4172E+01 -2.5650E+02 8.7488E+02 -1.1056E+03 S4 -6.9030E-01 1.7042E+00 -1.4248E+01 8.2528E+01 -2.9869E+02 6.0617E+02 -5.0424E+02 S5 -8.9398E-01 2.1376E+00 -1.8113E+01 9.0362E+01 -2.8322E+02 4.9513E+02 -3.6565E+02 S6 -6.5196E-01 2.5205E+00 -9.7566E+00 2.6421E+01 -4.2098E+01 3.5974E+01 -1.2459E+01 S7 -4.1056E-01 1.4937E+00 -4.4661E+00 8.9015E+00 -1.1156E+01 7.7419E+00 -2.2869E+00 S8 2.9140E-01 -1.1051E+00 2.6046E+00 -4.0252E+00 3.7926E+00 -1.9442E+00 3.9431E-01 S9 5.7254E-01 -2.5305E+00 4.4708E+00 -5.4399E+00 3.5096E+00 -8.2264E-01 0.0000E+00 S10 4.1536E-01 -1.2472E+00 1.7474E+00 -1.5623E+00 8.7133E-01 -2.7217E-01 3.5951E-02 S11 -9.2102E-01 1.0827E+00 -8.1352E-01 3.9316E-01 -1.2657E-01 2.9442E-02 -4.3128E-03 S12 -5.0760E-01 5.3113E-01 -3.7351E-01 1.5699E-01 -3.4869E-02 2.9216E-03 0.0000E+00

[0149] Table 12

[0150] Figure 12A The axial chromatic aberration curve of the optical imaging lens group of Example 6 is shown, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens group of Example 6 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C The distortion curve of the optical imaging lens group of Example 6 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 12D The lateral chromatic aberration curve of the optical imaging lens group of Example 6 is shown, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 12A to 12D It can be seen that the optical imaging lens group given in Example 6 can achieve good imaging quality.

[0151] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0152] Conditional formula / Example 1 2 3 4 5 6 ImgH×EPD / f(mm) 0.87 0.84 0.82 0.83 0.83 0.75 SD / TD 0.82 0.77 0.81 0.82 0.76 0.75 f / f5 -0.52 -0.98 -0.43 -0.66 -0.36 -0.75 f3 / (f1+f3) 0.65 0.67 0.69 0.74 0.58 0.83 f / f2 0.53 1.15 0.84 0.61 0.75 0.50 DT12 / R2 0.28 0.61 0.26 0.35 0.42 0.35 SAG51 / (SAG51-SAG12) 0.67 0.41 0.54 0.63 0.61 0.55 DT42 / DT61 0.64 0.77 0.63 0.80 0.79 0.69 ET4 / CT4 0.46 0.45 0.45 0.40 0.31 0.36 ET5 / DT51 0.59 0.52 0.65 0.66 0.43 0.74 R8 / f4 -0.90 -0.73 -0.92 -0.94 -0.85 -0.84 R2 / R3 1.04 0.53 1.18 0.59 0.65 1.06 R8 / R9 0.54 0.28 0.61 0.23 0.36 0.19 R12 / R11 0.85 0.64 0.94 0.62 0.59 0.88 CT2 / (CT1+CT3+CT5) 0.76 0.76 0.46 0.55 0.50 0.37

[0153] Table 13

[0154] The present application also provides an imaging device, and its electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (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 group described above.

[0155] The above description is only the preferred embodiments of the present application and the description 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 solutions formed by the specific combination of the above technical features, and 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 technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. An optical imaging lens group, characterized in that, In order from the object side to the image side along the optical axis, it includes: A first lens with negative optical power, whose image side is concave; A second lens with positive optical power, whose object side is convex; A third lens with negative optical power; A fourth lens with positive optical power, whose image side is convex; A fifth lens with negative optical power, whose object side is concave; and A sixth lens with optical power, whose object side is convex and image side is concave; The maximum field of view FOV of the optical imaging lens group satisfies: 104° < FOV < 113°; and Half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens group, the total effective focal length f of the optical imaging lens group, and the entrance pupil diameter EPD of the optical imaging lens group satisfy: 0.75mm ≤ ImgH × EPD / f < 0.9mm; The radius of curvature R8 of the image side of the fourth lens and the radius of curvature R9 of the object side of the fifth lens satisfy: 0.19 ≤ R8 / R9 ≤ 0.61; The number of lenses with optical power in the optical imaging lens group is six.

2. The optical imaging lens group according to claim 1, characterized in that, The effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens group satisfy: -1.0 < f / f5 ≤ -0.

36.

3. The optical imaging lens group according to claim 1, wherein The effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy: 0.58 ≤ f3 / (f1 + f3) ≤ 0.

83.

4. The optical imaging lens group according to claim 1, characterized in that, The total effective focal length f of the optical imaging lens group and the effective focal length f2 of the second lens satisfy: 0.50 ≤ f / f2 ≤ 1.

15.

5. The optical imaging lens group according to claim 1, characterized in that, The maximum effective radius DT12 of the image side of the first lens and the radius of curvature R2 of the image side of the first lens satisfy: 0.26 ≤ DT12 / R2 ≤ 0.

61.

6. The optical imaging lens group according to claim 1, wherein The distance SAG12 on the optical axis from the intersection of the image side of the first lens and the optical axis to the vertex of the effective radius of the image side of the first lens and the distance SAG51 on the optical axis from the intersection of the object side of the fifth lens and the optical axis to the vertex of the effective radius of the object side of the fifth lens satisfy: 0.41 ≤ SAG51 / (SAG51 - SAG12) < 0.

7.

7. The optical imaging lens group according to claim 1, wherein The maximum effective radius DT42 of the image side of the fourth lens and the maximum effective radius DT61 of the object side of the sixth lens satisfy: 0.6 < DT42 / DT61 ≤ 0.

80.

8. The optical imaging lens group according to claim 1, wherein The central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 0.31 ≤ ET4 / CT4 < 0.

5.

9. The optical imaging lens group according to claim 1, wherein The edge thickness ET5 of the fifth lens and the maximum effective radius DT51 of the object side of the fifth lens satisfy: 0.4 < ET5 / DT51 ≤ 0.

74.

10. The optical imaging lens group according to claim 1, wherein, The radius of curvature R8 of the image side of the fourth lens and the effective focal length f4 of the fourth lens satisfy: -0.94 ≤ R8 / f4 < -0.

7.

11. The optical imaging lens group according to claim 1, wherein, The radius of curvature R2 of the image side of the first lens and the radius of curvature R3 of the object side of the second lens satisfy: 0.5 < R2 / R3 < 1.

2.

12. The optical imaging lens group according to claim 1, characterized in that, The radius of curvature R11 of the object side surface of the sixth lens and the radius of curvature R12 of the image side surface of the sixth lens satisfy: 0.59 ≤ R12 / R11 ≤ 0.

94.

13. The optical imaging lens group according to any one of claims 1-12, characterized in that, The central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT5 of the fifth lens on the optical axis satisfy: 0.37 ≤ CT2 / (CT1 + CT3 + CT5) < 0.

8.

14. The optical imaging lens group according to any one of claims 1-12, characterized in that, The optical imaging lens group further includes a diaphragm, and the distance SD on the optical axis from the diaphragm to the image side surface of the sixth lens and the distance TD on the optical axis from the object side surface of the first lens to the image side surface of the sixth lens satisfy: 0.75 ≤ SD / TD ≤ 0.82.

Images