Optical imaging lens set

Abstract

The present application discloses an optical imaging lens group, which includes, in order 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 optical power, whose image side surface is concave; a fourth lens with negative optical power; a fifth lens with optical power; and a sixth lens with optical power. Half of the maximum field of view angle Semi-FOV of the optical imaging lens group satisfies: 45°<Semi-FOV<55°. The curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy: 0.5<(R1+R2) / (R3-R4)<1.5.

Description

Technical Field

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

[0002] With the rapid development of portable electronic products such as mobile phones and tablets, users have higher and higher requirements for the appearance and performance of portable electronic products such as mobile phones and tablets. At the same time, the market demand for the under-screen fingerprint unlocking function of electronic products is increasing. In order to meet market demand, electronic products with under-screen fingerprint unlocking functions are gradually entering the public's field of vision. However, the under-screen cameras of most electronic products currently have poor light transmittance, resulting in certain defects in the under-screen fingerprint unlocking function. Summary of the invention

[0003] On the one hand, the present application provides such an optical imaging lens group, which includes, in order 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 optical power, whose image side surface is concave; a fourth lens with negative optical power; a fifth lens with optical power; and a sixth lens with optical power. Half of the maximum field of view angle Semi-FOV of the optical imaging lens group can satisfy: 45°<Semi-FOV<55°. The curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens can satisfy: 0.5<(R1+R2) / (R3-R4)<1.5.

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

[0005] In one embodiment, the effective focal length f2 of the second lens and the curvature radius R3 of the object-side surface of the second lens may satisfy: 0.4<f2 / R3<0.9.

[0006] In one embodiment, the combined focal length f123 of the first lens, the second lens, and the third lens and the combined focal length f45 of the fourth lens and the fifth lens may satisfy: 0.3<f45 / f123<1.3.

[0007] In one embodiment, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens may satisfy: 0<(f6-f5) / f4<1.0.

[0008] In one embodiment, the distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens on the optical axis and the distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens on the optical axis may satisfy: 0.2<SAG22 / SAG52<0.7.

[0009] In one embodiment, the object-side surface of the sixth lens has at least one inflection point, and a vertical distance Yc61 from the inflection point to the optical axis and a maximum effective radius DT61 of the object-side surface of the sixth lens may satisfy: 0<Yc61 / DT61<1.0.

[0010] In one embodiment, the maximum effective radius DT21 of the object-side surface of the second lens and the maximum effective radius DT41 of the object-side surface of the fourth lens may satisfy: 0.3<DT21 / DT41<0.8.

[0011] In one embodiment, a curvature radius R6 of the image side surface of the third lens, a curvature radius R10 of the image side surface of the fifth lens, a curvature radius R11 of the object side surface of the sixth lens, and a curvature radius R12 of the image side surface of the sixth lens may satisfy: 0.3<(R11+R12) / (R6-R10)<2.0.

[0012] In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the edge thickness ET1 of the first lens, and the edge thickness ET3 of the third lens may satisfy: 1.5<CT1 / ET1+CT3 / ET3<2.0.

[0013] In one implementation, a center thickness CT5 of the fifth lens on the optical axis and a center thickness CT6 of the sixth lens on the optical axis may satisfy: 0.2<CT6 / CT5<0.7.

[0014] In one embodiment, the interval T34 between the third lens and the fourth lens on the optical axis and the sum ΣAT of the intervals between any two adjacent lenses from the first lens to the sixth lens on the optical axis may satisfy: 0.3<T34 / ΣAT<0.8.

[0015] In one embodiment, the object side surface of the first lens is convex and the image side surface is concave; the second lens has positive optical power, its object side surface is convex, and its image side surface is convex; the third lens has negative optical power; the fifth lens has positive optical power, its image side surface is convex; and the sixth lens has negative optical power, its object side surface is convex, and its image side surface is concave.

[0016] In one embodiment, 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: f / EPD<1.7.

[0017] In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group on the optical axis and half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens group may satisfy: TTL / ImgH<1.5.

[0018] On the other hand, the present application provides an optical imaging lens group, which includes, in order 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 optical power, whose image side surface is concave; a fourth lens with negative optical power; a fifth lens with optical power; and a sixth lens with optical power. Half of the maximum field of view angle Semi-FOV of the optical imaging lens group can satisfy: 45°<Semi-FOV<55°. The combined focal length f123 of the first lens, the second lens and the third lens and the combined focal length f45 of the fourth lens and the fifth lens can satisfy: 0.3<f45 / f123<1.3.

[0019] In one embodiment, the effective focal length f2 of the second lens and the curvature radius R3 of the object-side surface of the second lens may satisfy: 0.4<f2 / R3<0.9.

[0020] In one embodiment, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens may satisfy: 0<(f6-f5) / f4<1.0.

[0021] In one embodiment, the distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens on the optical axis and the distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens on the optical axis may satisfy: 0.2<SAG22 / SAG52<0.7.

[0022] In one embodiment, the object-side surface of the sixth lens has at least one inflection point, and a vertical distance Yc61 from the inflection point to the optical axis and a maximum effective radius DT61 of the object-side surface of the sixth lens may satisfy: 0<Yc61 / DT61<1.0.

[0023] In one embodiment, the maximum effective radius DT21 of the object-side surface of the second lens and the maximum effective radius DT41 of the object-side surface of the fourth lens may satisfy: 0.3<DT21 / DT41<0.8.

[0024] In one embodiment, a curvature radius R6 of the image side surface of the third lens, a curvature radius R10 of the image side surface of the fifth lens, a curvature radius R11 of the object side surface of the sixth lens, and a curvature radius R12 of the image side surface of the sixth lens may satisfy: 0.3<(R11+R12) / (R6-R10)<2.0.

[0025] In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the edge thickness ET1 of the first lens, and the edge thickness ET3 of the third lens may satisfy: 1.5<CT1 / ET1+CT3 / ET3<2.0.

[0026] In one implementation, a center thickness CT5 of the fifth lens on the optical axis and a center thickness CT6 of the sixth lens on the optical axis may satisfy: 0.2<CT6 / CT5<0.7.

[0027] In one embodiment, the interval T34 between the third lens and the fourth lens on the optical axis and the sum ΣAT of the intervals between any two adjacent lenses from the first lens to the sixth lens on the optical axis may satisfy: 0.3<T34 / ΣAT<0.8.

[0028] In one embodiment, a curvature radius R1 of the object side surface of the first lens, a curvature radius R2 of the image side surface of the first lens, a curvature radius R3 of the object side surface of the second lens, and a curvature radius R4 of the image side surface of the second lens may satisfy: 0.5<(R1+R2) / (R3-R4)<1.5.

[0029] In one embodiment, the object side surface of the first lens is convex and the image side surface is concave; the second lens has positive optical power, its object side surface is convex, and its image side surface is convex; the third lens has negative optical power; the fifth lens has positive optical power, and its image side surface is convex; the sixth lens has negative optical power, its object side surface is convex, and its image side surface is concave.

[0030] In one embodiment, 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: f / EPD<1.7.

[0031] In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group on the optical axis and half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens group may satisfy: TTL / ImgH<1.5.

[0032] The present application provides an optical imaging lens group which is applicable to portable electronic products and has ultra-thinness, miniaturization, large aperture and good imaging quality by reasonably allocating optical focal length and optimizing optical parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0034] Figure 1 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 1 of the present application is shown;

[0035] FIG. 2A to FIG. 2D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Example 1 are respectively shown;

[0036] Figure 3 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 2 of the present application is shown;

[0037] 4A to 4D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Example 2 are respectively shown;

[0038] Figure 5 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 3 of the present application is shown;

[0039] FIG. 6A to FIG. 6D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Example 3 are respectively shown;

[0040] Figure 7 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 4 of the present application is shown;

[0041] FIG. 8A to FIG. 8D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Example 4 are respectively shown;

[0042] Fig. 9 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 5 of the present application is shown;

[0043] FIG. 10A to FIG. 10D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Example 5 are respectively shown;

[0044] Fig.11 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 6 of the present application is shown; and

[0045] FIG. 12A to FIG. 12D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Example 6 are respectively shown. DETAILED DESCRIPTION

[0046] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0047] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0048] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0049] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0050] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0051] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0052] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0053] The features, principles and other aspects of the present application are described in detail below.

[0054] The optical imaging lens group according to the 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. The six lenses are arranged in sequence from the object side to the image side along the optical axis. Any two adjacent lenses from the first lens to the sixth lens may have a spacing distance between them.

[0055] In an exemplary embodiment, the first lens may have negative optical power; the second lens may have positive optical power or negative optical power; the third lens may have positive optical power or negative optical power, and its image side surface may be concave; the fourth lens may have negative optical power; the fifth lens may have positive optical power or negative optical power; and the sixth lens may have positive optical power or negative optical power.

[0056] In an exemplary embodiment, by reasonably setting the optical power and surface characteristics of each lens, the low-order aberrations of the lens group can be effectively reduced and the imaging quality can be improved.

[0057] In an exemplary embodiment, the object side surface of the first lens may be a convex surface, and the image side surface may be a concave surface. Such a surface configuration of the first lens is conducive to focusing light.

[0058] In an exemplary embodiment, the second lens may have positive power, and its object side surface may be convex, and its image side surface may be convex; the third lens may have negative power; the fifth lens may have positive power, and its image side surface may be convex; and the sixth lens may have negative power, and its object side surface may be convex, and its image side surface may be concave. Such power and surface configuration of the second lens, the third lens, the fifth lens, and the sixth lens can effectively balance the negative spherical aberration generated by the second lens, the positive spherical aberration generated by the third lens, the negative spherical aberration generated by the fifth lens, and the positive spherical aberration generated by the sixth lens, which is ultimately conducive to making the lens group as a whole have smaller aberrations and improving the resolution of the lens group.

[0059] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: 45°<Semi-FOV<55°, wherein Semi-FOV is half of the maximum field of view of the optical imaging lens assembly. More specifically, Semi-FOV may further satisfy: 45°<Semi-FOV<47°. Satisfying 45°<Semi-FOV<55° is conducive to making the lens assembly have a larger field of view and improving the imaging range.

[0060] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.4<f2 / R3<0.9, where f2 is the effective focal length of the second lens, and R3 is the radius of curvature of the object side of the second lens. More specifically, f2 and R3 may further satisfy: 0.4<f2 / R3<0.8. Satisfying 0.4<f2 / R3<0.9 can reduce the negative spherical aberration generated by the second lens and improve the imaging performance of the lens group.

[0061] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.5<(R1+R2) / (R3-R4)<1.5, wherein R1 is the radius of curvature of the object side surface of the first lens, R2 is the radius of curvature of the image side surface of the first lens, R3 is the radius of curvature of the object side surface of the second lens, and R4 is the radius of curvature of the image side surface of the second lens. More specifically, R1, R2, R3, and R4 may further satisfy: 0.6<(R1+R2) / (R3-R4)<1.4. Satisfying 0.5<(R1+R2) / (R3-R4)<1.5 can effectively control the shapes of the first lens and the second lens, which is beneficial to control the refraction angle of the light beam incident on the lens group, achieve good processability of the lens group, and better match the lens group with the chip.

[0062] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<f45 / f123<1.3, wherein f123 is the combined focal length of the first lens, the second lens, and the third lens, and f45 is the combined focal length of the fourth lens and the fifth lens. More specifically, f45 and f123 may further satisfy: 0.3<f45 / f123<1.1. Satisfying 0.3<f45 / f123<1.3 can effectively balance the contribution of the front lens to the field curvature of the lens group, ensuring that the field curvature of the lens group is within a reasonable range.

[0063] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0<(f6-f5) / f4<1.0, wherein f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, and f6 is the effective focal length of the sixth lens. More specifically, f6, f5, and f4 may further satisfy: 0.2<(f6-f5) / f4<0.9. Satisfying 0<(f6-f5) / f4<1.0 can effectively control the optical power of the fourth lens, the fifth lens, and the sixth lens, thereby facilitating the control of the contribution of these three lenses to the aberration of the lens group.

[0064] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.2<SAG22 / SAG52<0.7, wherein SAG22 is the distance from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens on the optical axis, and SAG52 is the distance from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens on the optical axis. Satisfying 0.2<SAG22 / SAG52<0.7 can effectively control the shapes of the second lens and the fifth lens, which is beneficial to the molding and processing of the lens.

[0065] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0<Yc61 / DT61<1.0, wherein Yc61 is the vertical distance from the inflection point on the object side of the sixth lens to the optical axis, and DT61 is the maximum effective radius of the object side of the sixth lens. More specifically, Yc61 and DT61 may further satisfy: 0.2<Yc61 / DT61<1.0. Satisfying 0<Yc61 / DT61<1.0 can effectively control the shape of the sixth lens, ensure the processability of the lens, and effectively control the trend of the edge light, so that the lens group can be better matched with the chip.

[0066] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<DT21 / DT41<0.8, wherein DT21 is the maximum effective radius of the object side of the second lens, and DT41 is the maximum effective radius of the object side of the fourth lens. More specifically, DT21 and DT41 may further satisfy: 0.5<DT21 / DT41<0.8. Satisfying 0.3<DT21 / DT41<0.8 can effectively control the aperture of the second lens and the fourth lens, reasonably limit the incident range of the incident light, remove light with poor edge quality, and reduce off-axis aberrations. At the same time, by reasonably controlling the aperture range of the second lens and the fourth lens, the processability of the lens group can be increased, and the resolution of the lens group can be effectively improved.

[0067] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<(R11+R12) / (R6-R10)<2.0, wherein R6 is the radius of curvature of the image side surface of the third lens, R10 is the radius of curvature of the image side surface of the fifth lens, R11 is the radius of curvature of the object side surface of the sixth lens, and R12 is the radius of curvature of the image side surface of the sixth lens. More specifically, R11, R12, R6, and R10 may further satisfy: 0.4<(R11+R12) / (R6-R10)<1.5. Satisfying 0.3<(R11+R12) / (R6-R10)<2.0 can effectively control the contribution of the third lens, the fifth lens, and the sixth lens to the spherical aberration of the lens group, thereby improving the image quality of the lens group.

[0068] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 1.5<CT1 / ET1+CT3 / ET3<2.0, wherein CT1 is the center thickness of the first lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, ET1 is the edge thickness of the first lens, and ET3 is the edge thickness of the third lens. More specifically, CT1, ET1, CT3, and ET3 may further satisfy: 1.6<CT1 / ET1+CT3 / ET3<2.0. Satisfying 1.5<CT1 / ET1+CT3 / ET3<2.0 can effectively control the shapes of the first lens and the third lens, ensure the processability of the lens, and at the same time balance the field curvature generated by the first lens and the third lens, thereby improving the imaging performance of the lens group.

[0069] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.2<CT6 / CT5<0.7, wherein CT5 is the center thickness of the fifth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis. More specifically, CT6 and CT5 may further satisfy: 0.4<CT6 / CT5<0.7. Satisfying 0.2<CT6 / CT5<0.7 can effectively control the contribution of the fifth lens and the sixth lens to the field curvature of the lens group, thereby ensuring that the lens group has good image quality.

[0070] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<T34 / ΣAT<0.8, wherein T34 is the spacing distance between the third lens and the fourth lens on the optical axis, and ΣAT is the sum of the spacing distances between any two adjacent lenses from the first lens to the sixth lens on the optical axis. When 0.3<T34 / ΣAT<0.8 is satisfied, the spacing distances between the lenses can be reasonably allocated, ensuring that the lens group has a smaller field curvature, thereby improving the imaging quality of the lens group.

[0071] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: f / EPD<1.7, where f is the total effective focal length of the optical imaging lens assembly, and EPD is the entrance pupil diameter of the optical imaging lens assembly. Satisfying f / EPD<1.7 can effectively control the aperture of the lens assembly, ensuring that the lens assembly has a large amount of light transmission.

[0072] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: TTL / ImgH<1.5, wherein TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens assembly on the optical axis, and ImgH is half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens assembly. Satisfying TTL / ImgH<1.5 is conducive to miniaturization, making the lens assembly structure more compact, and meeting market demand.

[0073] In an exemplary embodiment, the optical imaging lens group according to the present application also includes an aperture arranged between the object side and the first lens. Optionally, the above-mentioned optical imaging lens group may also include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The present application proposes an optical imaging lens group with the characteristics of miniaturization, large aperture, ultra-thinness and high imaging quality. The optical imaging lens group according to the above-mentioned embodiment of the present application may adopt multiple lenses, such as the six lenses mentioned above. By reasonably allocating the optical focal length, surface shape, center thickness of each lens and axial spacing between each lens, the incident light can be effectively converged, the total optical length of the lens group can be reduced, and the processability of the imaging lens can be improved, so that the optical imaging lens group is more conducive to production and processing.

[0074] In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the sixth lens is an aspherical mirror surface. The characteristic of the aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all aspherical mirror surfaces.

[0075] 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 embodiments, 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.

[0076] Specific embodiments of the optical imaging lens assembly applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0077] Example 1

[0078] The following reference Figures 1 to 2D Describe the optical imaging lens group according to Example 1 of the present application. Figure 1 A schematic structural diagram of an optical imaging lens group according to Example 1 of the present application is shown.

[0079] like Figure 1 As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0080] The first lens E1 has negative optical power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative optical power, and its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has positive optical power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative optical power, and its object side surface S11 is convex, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0081] Table 1 shows the basic parameters of the optical imaging lens assembly of Example 1, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0082]

[0083]

[0084] Table 1

[0085] In this example, the total effective focal length f of the optical imaging lens group is 2.85 mm, the total length TTL of the optical imaging lens group (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens group) is 4.13 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.04 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 1.65, and half of the maximum field of view Semi-FOV of the optical imaging lens group is 46.2°.

[0086] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the sixth lens E6 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0087]

[0088] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0089] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.6125E-01 9.2362E-01 -1.8338E+01 1.8701E+02 -1.2507E+03 5.7368E+03 -1.8491E+04 S2 -8.1469E-02 -3.2259E-01 -1.5630E+00 4.7882E+01 -5.2543E+02 3.4557E+03 -1.5099E+04 S3 9.1067E-02 -9.0325E-01 1.3815E+01 -1.2977E+02 7.9514E+02 -3.2659E+03 9.1922E+03 S4 7.7162E-01 -6.6282E+00 4.7357E+01 -2.5627E+02 1.0350E+03 -3.1009E+03 6.8760E+03 S5 4.2456E-01 -4.2651E+00 2.6663E+01 -1.2141E+02 4.0263E+02 -9.6607E+02 1.6543E+03 S6 -2.2244E-01 3.2002E-01 -4.0308E-01 -4.4745E+00 3.8782E+01 -1.6468E+02 4.5145E+02 S7 2.1230E-01 -1.2968E+00 -1.1892E+01 1.6098E+02 -8.8307E+02 2.9666E+03 -6.7739E+03 S8 1.9221E+00 -1.3878E+01 4.9835E+01 -1.0821E+02 1.3002E+02 -1.9604E+01 -2.2790E+02 S9 2.1743E+00 -1.2031E+01 3.9873E+01 -9.1772E+01 1.5287E+02 -1.8746E+02 1.7047E+02 S10 4.7003E-01 -2.3750E+00 6.5914E+00 -1.2382E+01 1.7220E+01 -1.7693E+01 1.3308E+01 S11 -9.9549E-01 -1.6126E+00 6.9398E+00 -1.0957E+01 1.0350E+01 -6.4374E+00 2.7008E+00 S12 -1.8201E+00 2.6167E+00 -2.8266E+00 2.3442E+00 -1.5113E+00 7.5598E-01 -2.9084E-01

[0090] Table 2-1

[0091]

[0092]

[0093] Table 2-2

[0094] Figure 2A The axial chromatic aberration curve of the optical imaging lens group of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 2B The astigmatism curve of the optical imaging lens group of Example 1 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 2C The distortion curve of the optical imaging lens assembly of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 2D The magnification chromatic aberration curve of the optical imaging lens set of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 2A to FIG. 2D It can be seen that the optical imaging lens assembly provided in Example 1 can achieve good imaging quality.

[0095] Example 2

[0096] The following reference Figures 3 to 4D The optical imaging lens assembly according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 3 A schematic structural diagram of an optical imaging lens group according to Example 2 of the present application is shown.

[0097] like Figure 3As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0098] The first lens E1 has negative optical power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative optical power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive optical power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative optical power, and its object side surface S11 is convex, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0099] In this example, the total effective focal length f of the optical imaging lens group is 2.81 mm, the total length TTL of the optical imaging lens group is 4.30 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.04 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 1.64, and half of the maximum field of view Semi-FOV of the optical imaging lens group is 46.4°.

[0100] Table 3 shows the basic parameters of the optical imaging lens assembly of Example 2, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 4-1 and 4-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 2, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0101]

[0102] Table 3

[0103] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.8573E-01 3.4259E-01 -2.9154E+00 1.3589E+01 -3.9198E+01 7.1061E+01 -7.8491E+01 S2 -2.3700E-01 -3.0090E-01 3.0978E+00 -1.6916E+01 5.6764E+01 -1.1277E+02 1.3114E+02 S3 -1.1473E-01 -8.9141E-02 7.1259E-01 -3.7390E+00 1.3938E+01 -2.7950E+01 3.0489E+01 S4 1.3033E-01 -4.1803E-01 5.7481E-01 -1.7475E-01 -1.0719E+00 2.5795E+00 -3.0619E+00 S5 -1.2455E-01 2.7501E-01 -1.7272E+00 5.4993E+00 -1.0793E+01 1.3378E+01 -1.0158E+01 S6 -3.2268E-01 7.6477E-01 -2.2450E+00 4.5805E+00 -6.3819E+00 5.8984E+00 -3.4321E+00 S7 -2.3229E-01 1.5298E-01 4.5194E-01 -1.9112E+00 3.6405E+00 -4.0139E+00 2.6010E+00 S8 -1.6268E-01 -4.4877E-01 2.4183E+00 -6.7597E+00 1.2568E+01 -1.6475E+01 1.5255E+01 S9 1.0564E-01 -3.8124E-01 1.2426E-01 1.8861E+00 -5.9156E+00 9.3290E+00 -9.1836E+00 S10 5.1360E-01 -1.4182E+00 3.1385E+00 -5.2837E+00 6.6312E+00 -6.0427E+00 3.8686E+00 S11 3.6060E-02 -1.1837E+00 2.8085E+00 -3.9789E+00 3.8058E+00 -2.5614E+00 1.2367E+00 S12 -7.0224E-01 6.5530E-01 -4.8449E-01 2.6377E-01 -1.0480E-01 3.0410E-02 -6.4269E-03

[0104] Table 4-1

[0105] Face number A18 A20 A22 A24 A26 A28 A30 S1 4.8246E+01 -1.2666E+01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -8.2834E+01 2.1955E+01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.7276E+01 3.9855E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.9775E+00 -5.4288E-01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 4.3154E+00 -7.8523E-01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 1.1305E+00 -1.6003E-01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -9.1656E-01 1.3492E-01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 -9.7220E+00 4.0315E+00 -9.7243E-01 1.0288E-01 0.0000E+00 0.0000E+00 0.0000E+00 S9 5.9852E+00 -2.6108E+00 7.4614E-01 -1.2947E-01 1.0602E-02 0.0000E+00 0.0000E+00 S10 -1.6663E+00 4.5407E-01 -6.8803E-02 3.1636E-03 5.7218E-04 -7.5334E-05 0.0000E+00 S11 -4.3051E-01 1.0714E-01 -1.8584E-02 2.1324E-03 -1.4531E-04 4.4456E-06 0.0000E+00 S12 9.7651E-04 -1.0357E-04 7.2416E-06 -2.9780E-07 5.3989E-09 0.0000E+00 0.0000E+00

[0106] Table 4-2

[0107] Figure 4A The axial chromatic aberration curve of the optical imaging lens group of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 4BThe astigmatism curve of the optical imaging lens group of Example 2 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 4C The distortion curve of the optical imaging lens assembly of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 4D The magnification chromatic aberration curve of the optical imaging lens set of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 4A to 4D It can be seen that the optical imaging lens assembly provided in Example 2 can achieve good imaging quality.

[0108] Example 3

[0109] The following reference Figures 5 to 6D An optical imaging lens group according to Example 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens group according to Example 3 of the present application is shown.

[0110] like Figure 5 As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0111] The first lens E1 has negative optical power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative optical power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive optical power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative optical power, and its object side surface S11 is convex, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0112] In this example, the total effective focal length f of the optical imaging lens group is 2.83 mm, the total length TTL of the optical imaging lens group is 4.15 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.04 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 1.64, and half of the maximum field of view Semi-FOV of the optical imaging lens group is 46.1°.

[0113] Table 5 shows the basic parameters of the optical imaging lens assembly of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 6-1 and 6-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 3, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0114]

[0115] Table 5

[0116] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.2451E-01 1.2498E+00 -1.6833E+01 1.2959E+02 -6.4443E+02 2.1296E+03 -4.7117E+03 S2 -1.0054E-01 -2.3609E+00 3.8190E+01 -3.7786E+02 2.4334E+03 -1.0667E+04 3.2653E+04 S3 1.3635E-02 -8.6431E-01 1.5104E+01 -1.4548E+02 8.9926E+02 -3.7523E+03 1.0883E+04 S4 3.1440E-01 -2.5065E+00 2.3913E+01 -1.8025E+02 9.7316E+02 -3.7296E+03 1.0186E+04 S5 1.7407E-02 -9.0742E-01 7.9962E+00 -5.0444E+01 2.1819E+02 -6.6299E+02 1.4349E+03 S6 -3.2261E-01 8.5452E-01 -2.6365E+00 5.5401E+00 -6.7542E+00 1.4612E-01 1.5993E+01 S7 -3.6651E-01 1.0312E+00 -9.2040E+00 7.1274E+01 -3.6196E+02 1.2456E+03 -3.0122E+03 S8 -2.9048E-01 -4.4075E-01 4.1069E+00 -1.8046E+01 5.9512E+01 -1.5359E+02 3.0348E+02 S9 8.7849E-02 -4.1456E-01 -8.6322E-01 1.1994E+01 -5.1286E+01 1.3407E+02 -2.4041E+02 S10 4.3081E-01 -1.0326E+00 1.2634E+00 1.7286E+00 -1.1213E+01 2.5343E+01 -3.5183E+01 S11 -3.1099E-01 -7.4803E-01 3.0975E+00 -5.9710E+00 7.4282E+00 -6.4537E+00 4.0477E+00 S12 -1.1228E+00 1.6806E+00 -2.1490E+00 2.1625E+00 -1.6640E+00 9.6573E-01 -4.1981E-01

[0117] Table 6-1

[0118] Face number A18 A20 A22 A24 A26 A28 A30 S1 6.8896E+03 -6.3812E+03 3.3880E+03 -7.8488E+02 0.0000E+00 0.0000E+00 0.0000E+00 S2 -7.0507E+04 1.0696E+05 -1.1156E+05 7.6199E+04 -3.0697E+04 5.5307E+03 0.0000E+00 S3 -2.2231E+04 3.1907E+04 -3.1531E+04 2.0448E+04 -7.8398E+03 1.3478E+03 0.0000E+00 S4 -1.9819E+04 2.7202E+04 -2.5691E+04 1.5871E+04 -5.7687E+03 9.3496E+02 0.0000E+00 S5 -2.2188E+03 2.4303E+03 -1.8405E+03 9.1643E+02 -2.7006E+02 3.5722E+01 0.0000E+00 S6 -3.0656E+01 3.0277E+01 -1.7272E+01 5.3637E+00 -6.9840E-01 0.0000E+00 0.0000E+00 S7 5.2226E+03 -6.5280E+03 5.8349E+03 -3.6375E+03 1.5020E+03 -3.6913E+02 4.0855E+01 S8 -4.4935E+02 4.9018E+02 -3.8648E+02 2.1370E+02 -7.8525E+01 1.7210E+01 -1.7018E+00 S9 3.0693E+02 -2.8185E+02 1.8484E+02 -8.4416E+01 2.5483E+01 -4.5649E+00 3.6694E-01 S10 3.3231E+01 -2.1984E+01 1.0188E+01 -3.2378E+00 6.7198E-01 -8.2015E-02 4.4649E-03 S11 -1.8582E+00 6.2537E-01 -1.5269E-01 2.6351E-02 -3.0508E-03 2.1281E-04 -6.7654E-06 S12 1.3588E-01 -3.2439E-02 5.6173E-03 -6.8455E-04 5.5574E-05 -2.6949E-06 5.8999E-08

[0119] Table 6-2

[0120] Fig. 6A The axial chromatic aberration curve of the optical imaging lens group of Example 3 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 6B The astigmatism curve of the optical imaging lens group of Example 3 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 6C The distortion curve of the optical imaging lens assembly of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.6D The magnification chromatic aberration curve of the optical imaging lens set of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 6A to FIG. 6D It can be seen that the optical imaging lens assembly provided in Example 3 can achieve good imaging quality.

[0121] Example 4

[0122] The following reference Figures 7 to 8D An optical imaging lens group according to Example 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens group according to Example 4 of the present application is shown.

[0123] like Figure 7 As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0124] The first lens E1 has negative optical power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative optical power, and its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has positive optical power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative optical power, and its object side surface S11 is convex, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0125] In this example, the total effective focal length f of the optical imaging lens group is 2.84 mm, the total length TTL of the optical imaging lens group is 4.15 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.04 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 1.64, and half of the maximum field of view angle Semi-FOV of the optical imaging lens group is 46.1°.

[0126] Table 7 shows the basic parameters of the optical imaging lens assembly of Example 4, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 8-1 and 8-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 4, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0127]

[0128] Table 7

[0129] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.8558E-01 8.9900E-01 -1.2838E+01 9.7539E+01 -4.7956E+02 1.5669E+03 -3.4262E+03 S2 -5.0645E-02 -1.6111E+00 2.3724E+01 -2.2599E+02 1.4080E+03 -5.9988E+03 1.7896E+04 S3 5.3242E-02 -2.1722E-01 4.9749E+00 -5.0947E+01 3.2388E+02 -1.3608E+03 3.9054E+03 S4 9.8348E-01 -9.4302E+00 7.7137E+01 -4.8246E+02 2.2457E+03 -7.6914E+03 1.9262E+04 S5 6.0468E-01 -6.3428E+00 4.4168E+01 -2.2561E+02 8.3896E+02 -2.2764E+03 4.5125E+03 S6 -1.9184E-01 5.6000E-02 1.0005E+00 -7.3504E+00 2.7888E+01 -6.8275E+01 1.1361E+02 S7 4.9222E-02 -2.5369E+00 1.3255E+01 -2.5009E+01 -7.2383E+01 6.1784E+02 -2.0096E+03 S8 6.5825E-01 -8.2158E+00 4.5332E+01 -1.7456E+02 4.9499E+02 -1.0518E+03 1.6827E+03 S9 9.1481E-01 -5.7624E+00 2.1969E+01 -5.9952E+01 1.2002E+02 -1.7791E+02 1.9612E+02 S10 -2.4227E-01 1.4231E+00 -5.5028E+00 1.5272E+01 -2.9221E+01 3.8876E+01 -3.6331E+01 S11 -1.4269E+00 1.2802E+00 3.3902E-01 -2.7163E+00 3.9884E+00 -3.3337E+00 1.8034E+00 S12 -1.8105E+00 3.0230E+00 -3.9635E+00 3.9351E+00 -2.9342E+00 1.6395E+00 -6.8557E-01

[0130] Table 8-1

[0131] Face number A18 A20 A22 A24 A26 A28 A30 S1 4.9507E+03 -4.5318E+03 2.3786E+03 -5.4501E+02 0.0000E+00 0.0000E+00 0.0000E+00 S2 -3.7737E+04 5.6007E+04 -5.7261E+04 3.8416E+04 -1.5234E+04 2.7080E+03 0.0000E+00 S3 -7.8070E+03 1.0911E+04 -1.0498E+04 6.6532E+03 -2.5092E+03 4.2780E+02 0.0000E+00 S4 -3.4983E+04 4.5373E+04 -4.0845E+04 2.4198E+04 -8.4728E+03 1.3271E+03 0.0000E+00 S5 -6.5074E+03 6.7367E+03 -4.8703E+03 2.3321E+03 -6.6421E+02 8.5155E+01 0.0000E+00 S6 -1.2975E+02 9.9984E+01 -4.9570E+01 1.4241E+01 -1.7974E+00 0.0000E+00 0.0000E+00 S7 4.0196E+03 -5.4241E+03 5.0514E+03 -3.2113E+03 1.3333E+03 -3.2626E+02 3.5702E+01 S8 -2.0214E+03 1.8065E+03 -1.1796E+03 5.4536E+02 -1.6878E+02 3.1322E+01 -2.6326E+00 S9 -1.6054E+02 9.6785E+01 -4.2237E+01 1.2938E+01 -2.6321E+00 3.1879E-01 -1.7374E-02 S10 2.4040E+01 -1.1291E+01 3.7366E+00 -8.5181E-01 1.2735E-01 -1.1246E-02 4.4484E-04 S11 -6.5011E-01 1.5350E-01 -2.1781E-02 1.2670E-03 1.0436E-04 -2.1736E-05 1.0496E-06 S12 2.1371E-01 -4.9235E-02 8.2418E-03 -9.7233E-04 7.6501E-05 -3.5980E-06 7.6437E-08

[0132] Table 8-2

[0133] Fig. 8A The axial chromatic aberration curve of the optical imaging lens group of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8B The astigmatism curve of the optical imaging lens group of Example 4 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 8C The distortion curve of the optical imaging lens assembly of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.8DThe magnification chromatic aberration curve of the optical imaging lens set of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 8A to FIG. 8D It can be seen that the optical imaging lens group provided in Example 4 can achieve good imaging quality.

[0134] Example 5

[0135] The following reference Figures 9 to 10D An optical imaging lens group according to Example 5 of the present application is described. Fig. 9 A schematic structural diagram of an optical imaging lens group according to Example 5 of the present application is shown.

[0136] like Fig. 9 As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0137] The first lens E1 has negative optical power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative optical power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has positive optical power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative optical power, and its object side surface S11 is convex, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0138] In this example, the total effective focal length f of the optical imaging lens group is 2.85 mm, the total length TTL of the optical imaging lens group is 4.12 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.04 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 1.65, and half of the maximum field of view angle Semi-FOV of the optical imaging lens group is 46.2°.

[0139] Table 9 shows the basic parameters of the optical imaging lens assembly of Example 5, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 10-1 and 10-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 5, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0140]

[0141] Table 9

[0142]

[0143]

[0144] Table 10-1

[0145] Face number A18 A20 A22 A24 A26 A28 A30 S1 6.0248E+04 -9.7410E+04 1.0853E+05 -7.9361E+04 3.4295E+04 -6.6391E+03 0.0000E+00 S2 5.3357E+04 -1.0778E+05 1.5358E+05 -1.5081E+05 9.7075E+04 -3.6852E+04 6.2527E+03 S3 -1.9204E+04 2.6118E+04 -2.4059E+04 1.4184E+04 -4.6858E+03 5.4691E+02 5.9218E+01 S4 -1.0448E+04 1.2071E+04 -9.7948E+03 5.3030E+03 -1.7330E+03 2.6898E+02 -5.6186E+00 S5 -1.8949E+03 1.4589E+03 -5.8530E+02 -5.2033E+01 1.8788E+02 -8.6821E+01 1.4179E+01 S6 -2.8973E+02 4.2712E+02 -4.3395E+02 3.0020E+02 -1.3510E+02 3.5651E+01 -4.1837E+00 S7 1.2128E+04 -1.3525E+04 1.0827E+04 -6.0662E+03 2.2586E+03 -5.0187E+02 5.0353E+01 S8 1.0224E+03 -8.7268E+02 5.2205E+02 -2.1519E+02 5.8259E+01 -9.3239E+00 6.6807E-01 S9 -5.2410E+01 2.3967E+01 -8.0193E+00 1.9054E+00 -3.0415E-01 2.9222E-02 -1.2759E-03 S10 -7.9408E+00 3.1263E+00 -8.7691E-01 1.7068E-01 -2.1888E-02 1.6621E-03 -5.6595E-05 S11 -9.1383E-01 1.8828E-01 -2.5277E-02 1.9341E-03 -4.3159E-05 -4.4772E-06 2.6607E-07 S12 1.2539E-01 -2.8840E-02 4.8326E-03 -5.7099E-04 4.4964E-05 -2.1141E-06 4.4835E-08

[0146] Table 10-2

[0147] Fig. 10A The axial chromatic aberration curve of the optical imaging lens group of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 10B The astigmatism curve of the optical imaging lens group of Example 5 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Fig. 10C The distortion curve of the optical imaging lens assembly of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig. 10D The magnification chromatic aberration curve of the optical imaging lens set of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 10A to FIG. 10D It can be seen that the optical imaging lens group provided in Example 5 can achieve good imaging quality.

[0148] Example 6

[0149] The following reference Figures 11 to 12D An optical imaging lens group according to Example 6 of the present application is described. Fig.11 A schematic structural diagram of an optical imaging lens group according to Example 6 of the present application is shown.

[0150] like Fig.11 As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0151] The first lens E1 has negative optical power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has negative optical power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive optical power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative optical power, and its object side surface S11 is convex, and its image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0152] In this example, the total effective focal length f of the optical imaging lens group is 2.83 mm, the total length TTL of the optical imaging lens group is 4.30 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.04 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 1.63, and half of the maximum field of view Semi-FOV of the optical imaging lens group is 46.2°.

[0153] Table 11 shows the basic parameters of the optical imaging lens assembly of Example 6, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 12-1 and 12-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 6, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0154]

[0155] Table 11

[0156]

[0157]

[0158] Table 12-1

[0159] Face number A18 A20 A22 A24 A26 A28 A30 S1 3.6649E+05 -7.1388E+05 9.9745E+05 -9.7394E+05 6.3066E+05 -2.4318E+05 4.2243E+04 S2 -9.4833E+04 1.8600E+05 -2.5914E+05 2.5018E+05 -1.5905E+05 5.9866E+04 -1.0105E+04 S3 -2.5318E+04 4.5975E+04 -5.9520E+04 5.3548E+04 -3.1807E+04 1.1216E+04 -1.7782E+03 S4 -8.8082E+04 1.2211E+05 -1.2344E+05 8.8233E+04 -4.2192E+04 1.2094E+04 -1.5696E+03 S5 -4.0228E+04 4.9518E+04 -4.4492E+04 2.8321E+04 -1.2087E+04 3.0998E+03 -3.6090E+02 S6 1.1261E+03 -1.3764E+03 1.1691E+03 -6.7955E+02 2.5801E+02 -5.7674E+01 5.7555E+00 S7 5.2927E+02 -6.1654E+02 5.1766E+02 -3.0588E+02 1.2071E+02 -2.8533E+01 3.0509E+00 S8 -8.1756E+02 8.1305E+02 -5.8310E+02 2.9358E+02 -9.8442E+01 1.9738E+01 -1.7899E+00 S9 1.5750E+02 -1.5585E+02 1.0795E+02 -5.1251E+01 1.5875E+01 -2.8882E+00 2.3394E-01 S10 -3.6151E+01 2.7616E+01 -1.4823E+01 5.4360E+00 -1.2943E+00 1.8010E-01 -1.1112E-02 S11 -2.6419E+00 1.0072E+00 -2.7804E-01 5.3900E-02 -6.9442E-03 5.3317E-04 -1.8445E-05 S12 8.0094E-02 -1.8208E-02 3.0036E-03 -3.4891E-04 2.7027E-05 -1.2519E-06 2.6214E-08

[0160] Table 12-2

[0161] Fig. 12A The axial chromatic aberration curve of the optical imaging lens group of Example 6 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 12B The astigmatism curve of the optical imaging lens group of Example 6 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Fig. 12CThe distortion curve of the optical imaging lens assembly of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.12D The magnification chromatic aberration curve of the optical imaging lens set of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 12A to FIG. 12D It can be seen that the optical imaging lens group provided in Example 6 can achieve good imaging quality.

[0162] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0163]

[0164]

[0165] Table 13

[0166] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens group described above.

[0167] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical imaging lens assembly, characterized in that: Along the optical axis from the object side to the image side, they include: The first lens has a negative optical power, and its object side surface is convex and its image side surface is concave; The second lens has positive power, and its object-side surface is convex and its image-side surface is convex; The third lens has a negative optical power and its image side surface is concave; a fourth lens having negative optical power; a fifth lens element having positive refractive power, the image-side surface of which is convex; and a sixth lens having negative optical power, whose object side surface is convex and whose image side surface is concave; Wherein, the number of lenses with optical power in the optical imaging lens group is six; Half of the maximum field of view angle Semi-FOV of the optical imaging lens group satisfies: 45°<Semi-FOV<47°; The combined focal length f123 of the first lens, the second lens and the third lens and the combined focal length f45 of the fourth lens and the fifth lens satisfy: 0.42≤f45 / f123≤1.00; and A distance T34 between the third lens and the fourth lens on the optical axis and a sum ΣAT of distances between any two adjacent lenses from the first lens to the sixth lens on the optical axis satisfy: 0.42≤T34 / ΣAT≤0.

68.

2. The optical imaging lens assembly according to claim 1, characterized in that: The effective focal length f2 of the second lens and the curvature radius R3 of the object side surface of the second lens satisfy: 0.46≤f2 / R3≤0.

74.

3. The optical imaging lens assembly according to claim 1, characterized in that: The effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy: 0.26≤(f6-f5) / f4<0.

9.

4. The optical imaging lens assembly according to claim 1, characterized in that: The distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens on the optical axis and the distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens on the optical axis satisfy: 0.33≤SAG22 / SAG52≤0.

64.

5. The optical imaging lens assembly according to claim 1, characterized in that: The object-side surface of the sixth lens has at least one inflection point, and a vertical distance Yc61 from the inflection point to the optical axis and a maximum effective radius DT61 of the object-side surface of the sixth lens satisfy: 0.2<Yc61 / DT61<1.

0.

6. The optical imaging lens assembly according to claim 1, characterized in that: The maximum effective radius DT21 of the object-side surface of the second lens and the maximum effective radius DT41 of the object-side surface of the fourth lens satisfy: 0.55≤DT21 / DT41≤0.

69.

7. The optical imaging lens assembly according to claim 1, characterized in that: A curvature radius R6 of the image side surface of the third lens, a curvature radius R10 of the image side surface of the fifth lens, a curvature radius R11 of the object side surface of the sixth lens, and a curvature radius R12 of the image side surface of the sixth lens satisfy: 0.45≤(R11+R12) / (R6-R10)≤1.

41.

8. The optical imaging lens assembly according to claim 1, characterized in that: A center thickness CT1 of the first lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, an edge thickness ET1 of the first lens, and an edge thickness ET3 of the third lens satisfy: 1.71≤CT1 / ET1+CT3 / ET3≤1.

90.

9. The optical imaging lens assembly according to claim 1, characterized in that: A center thickness CT5 of the fifth lens on the optical axis and a center thickness CT6 of the sixth lens on the optical axis satisfy: 0.46≤CT6 / CT5≤0.

59.

10. The optical imaging lens assembly according to claim 1, characterized in that: A curvature radius R1 of the object side surface of the first lens, a curvature radius R2 of the image side surface of the first lens, a curvature radius R3 of the object side surface of the second lens, and a curvature radius R4 of the image side surface of the second lens satisfy: 0.65≤(R1+R2) / (R3-R4)<1.

4.

11. The optical imaging lens assembly according to any one of claims 1 to 10, characterized in that: 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: 1.63≤f / EPD<1.

7.

12. The optical imaging lens assembly according to any one of claims 1 to 10, characterized in that: The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group on the optical axis and half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens group satisfy: 1.36≤TTL / ImgH≤1.41.

Images