Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with optical power, whose object side surface is a concave surface; a second lens with optical power; a third lens with positive optical power; a fourth lens with negative optical power; a fifth lens with optical power; and a sixth lens with optical power; the maximum field of view FOV of the optical imaging lens satisfies: 90°<FOV<120°; half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH, the total effective focal length f of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens satisfy the following conditional formulas: ImgH>4.5mm; f / EPD<2; and f / ImgH≥0.9.

Description

Technical Field

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

[0002] With the rapid development and manufacturing of smart terminals such as smartphones, drones, and smart home monitoring devices, the market has higher and higher requirements for the imaging quality and appearance design of optical imaging lenses. However, existing miniaturized optical imaging lenses still have problems such as small imaging size and large lens thickness. They are usually unable to meet the requirements of small lens thickness while ensuring large image plane characteristics. In addition, in darker environments, the optical imaging lens does not have enough light transmission, resulting in more noise in night scene imaging.

[0003] How to make an optical imaging lens with a smaller size meet the requirements of large image surface, ultra-thinness, and good imaging quality is one of the difficult problems that many lens designers are currently facing. Summary of the invention

[0004] On one hand, the present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with optical power, whose object side surface is a concave surface; a second lens with optical power; a third lens with positive optical power; a fourth lens with negative optical power; a fifth lens with optical power; and a sixth lens with optical power; the maximum field of view FOV of the optical imaging lens can satisfy: 90°<FOV<120°; half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, the total effective focal length f of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens can satisfy the following conditional formulas: ImgH>4.5mm; f / EPD<2; and f / ImgH≥0.9.

[0005] 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.

[0006] In one embodiment, a curvature radius R2 of the image side surface of the first lens and a curvature radius R6 of the image side surface of the third lens may satisfy: 0.4<R6 / R2<0.9.

[0007] In one embodiment, the combined focal length f12 of the first lens and the second lens and the combined focal length f345 of the third lens, the fourth lens and the fifth lens may satisfy: 0.2<f345 / f12<0.7.

[0008] In one embodiment, the effective focal length f3 of the third lens, 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: 0.5<f5 / f3+f6 / f4<1.0.

[0009] In one embodiment, 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 and the distance SAG61 from the intersection of the object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object side surface of the sixth lens on the optical axis may satisfy: 0.5<SAG61 / SAG52<1.0.

[0010] In one embodiment, the distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the vertex of the effective radius of the object side surface of the second lens on the optical axis and the distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens on the optical axis may satisfy: -1.0<SAG32 / SAG21<-0.5.

[0011] In one embodiment, an edge thickness ET1 of the first lens and an edge thickness ET6 of the sixth lens may satisfy: 0.3<ET1 / ET6<0.8.

[0012] In one embodiment, an edge thickness ET3 of the third lens, an edge thickness ET4 of the fourth lens, a maximum effective radius DT31 of the object side of the third lens, and a maximum effective radius DT42 of the image side of the fourth lens may satisfy: 0.5<ET3 / DT31+ET4 / DT42<1.0.

[0013] In one embodiment, the maximum effective radius DT12 of the image-side surface of the first lens and the maximum effective radius DT61 of the object-side surface of the sixth lens may satisfy: 0.5<DT12 / DT61<1.0.

[0014] In one embodiment, a curvature radius R3 of the object side surface of the second lens, a curvature radius R4 of the image side surface of the second lens, a curvature radius R8 of the image side surface of the fourth lens, and a curvature radius R12 of the image side surface of the sixth lens may satisfy: 0.5<R3 / R4+R12 / R8<1.0.

[0015] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy: 0.3<(f1+f2) / (f1-f2)<0.8.

[0016] In one embodiment, the total effective focal length f of the optical imaging lens, the curvature radius R1 of the object-side surface of the first lens, and the curvature radius R10 of the image-side surface of the fifth lens may satisfy: 0.5<R10 / f-R1 / f<1.0.

[0017] In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis may satisfy: 0.5<(CT1+CT2) / (CT5+CT6)<1.0.

[0018] In one embodiment, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a sum ΣAT of the spacing distances between any two adjacent lenses from the first lens to the sixth lens on the optical axis may satisfy: 0.6<(CT3+CT4) / ΣAT<1.1.

[0019] On the other hand, the present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with optical power, whose object side surface is concave; a second lens with optical power; a third lens with positive optical power; a fourth lens with negative optical power; a fifth lens with optical power; and a sixth lens with optical power. The maximum field of view FOV of the optical imaging lens satisfies: 90°<FOV<120°; half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH satisfies: ImgH>4.5mm; the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD<2; and the curvature radius R2 of the image side surface of the first lens and the curvature radius R6 of the image side surface of the third lens satisfy: 0.4<R6 / R2<0.9.

[0020] In one embodiment, the combined focal length f12 of the first lens and the second lens and the combined focal length f345 of the third lens, the fourth lens and the fifth lens may satisfy: 0.2<f345 / f12<0.7.

[0021] In one embodiment, the effective focal length f3 of the third lens, 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: 0.5<f5 / f3+f6 / f4<1.0.

[0022] In one embodiment, 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 and the distance SAG61 from the intersection of the object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object side surface of the sixth lens on the optical axis may satisfy: 0.5<SAG61 / SAG52<1.0.

[0023] In one embodiment, the distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the vertex of the effective radius of the object side surface of the second lens on the optical axis and the distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens on the optical axis may satisfy: -1.0<SAG32 / SAG21<-0.5.

[0024] In one embodiment, an edge thickness ET1 of the first lens and an edge thickness ET6 of the sixth lens may satisfy: 0.3<ET1 / ET6<0.8.

[0025] In one embodiment, an edge thickness ET3 of the third lens, an edge thickness ET4 of the fourth lens, a maximum effective radius DT31 of the object side of the third lens, and a maximum effective radius DT42 of the image side of the fourth lens may satisfy: 0.5<ET3 / DT31+ET4 / DT42<1.0.

[0026] In one embodiment, the maximum effective radius DT12 of the image-side surface of the first lens and the maximum effective radius DT61 of the object-side surface of the sixth lens may satisfy: 0.5<DT12 / DT61<1.0.

[0027] In one embodiment, a curvature radius R3 of the object side surface of the second lens, a curvature radius R4 of the image side surface of the second lens, a curvature radius R8 of the image side surface of the fourth lens, and a curvature radius R12 of the image side surface of the sixth lens may satisfy: 0.5<R3 / R4+R12 / R8<1.0.

[0028] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy: 0.3<(f1+f2) / (f1-f2)<0.8.

[0029] In one embodiment, the total effective focal length f of the optical imaging lens, the curvature radius R1 of the object-side surface of the first lens, and the curvature radius R10 of the image-side surface of the fifth lens may satisfy: 0.5<R10 / f-R1 / f<1.0.

[0030] In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis may satisfy: 0.5<(CT1+CT2) / (CT5+CT6)<1.0.

[0031] In one embodiment, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a sum ΣAT of the spacing distances between any two adjacent lenses from the first lens to the sixth lens on the optical axis may satisfy: 0.6<(CT3+CT4) / ΣAT<1.1.

[0032] In one embodiment, the total effective focal length f of the optical imaging lens and half the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens may satisfy: f / ImgH≥0.9.

[0033] The present application provides an optical imaging lens which is applicable to portable electronic products and has at least one of the beneficial effects of miniaturization, ultra-thinness, large image surface, large aperture and good imaging quality by reasonably allocating optical focal length and optimizing optical parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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:

[0035] Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0036] FIG. 2A to FIG. 2D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 1 are respectively shown;

[0037] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0038] FIG. 4A to FIG. 4D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 2 are respectively shown;

[0039] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0040] FIG. 6A to FIG. 6D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 3 are respectively shown;

[0041] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0042] FIG. 8A to FIG. 8D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 4 are respectively shown;

[0043] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0044] FIG. 10A to FIG. 10D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown;

[0045] Fig.11 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown; and

[0046] FIG. 12A to FIG. 12D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 6 are respectively shown. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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 way unless explicitly defined in this article.

[0053] 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.

[0054] The features, principles and other aspects of the present application are described in detail below.

[0055] The optical imaging lens 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.

[0056] In an exemplary embodiment, the first lens may have positive or negative optical power, and its object side surface may be concave; the second lens may have positive or negative optical power; the third lens may have positive optical power; the fourth lens may have negative optical power; the fifth lens may have positive or negative optical power; and the sixth lens may have positive or negative optical power.

[0057] In an exemplary embodiment, the first lens having a concave object-side surface is matched with the third lens having positive optical power and the fourth lens having negative optical power, so that the optical system can have better imaging quality.

[0058] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 90°<FOV<120°, where FOV is the maximum field of view of the optical imaging lens. More specifically, FOV may further satisfy: 91°<FOV<98°. Satisfying 90°<FOV<120° is conducive to achieving wide-angle characteristics.

[0059] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: ImgH>4.5mm, where ImgH is half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens. Satisfying ImgH>4.5mm is conducive to achieving a large image plane characteristic.

[0060] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: f / EPD<2, where f is the total effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens. Satisfying f / EPD<2 is conducive to making the system have a larger aperture, and can obtain higher imaging quality in darker scenes.

[0061] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: f / ImgH≥0.9, where f is the total effective focal length of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens. When f / ImgH≥0.9 is satisfied, the total effective focal length of the optical imaging lens can be constrained within a reasonable range.

[0062] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.4<R6 / R2<0.9, where R2 is the radius of curvature of the image side surface of the first lens, and R6 is the radius of curvature of the image side surface of the third lens. More specifically, R6 and R2 may further satisfy: 0.5<R6 / R2<0.8. When 0.4<R6 / R2<0.9 is satisfied, the aberration contribution of the first lens and the third lens to the system can be controlled within a reasonable range.

[0063] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.2<f345 / f12<0.7, wherein f12 is the combined focal length of the first lens and the second lens, and f345 is the combined focal length of the third lens, the fourth lens, and the fifth lens. More specifically, f345 and f12 may further satisfy: 0.2<f345 / f12<0.5. Satisfying 0.2<f345 / f12<0.7 is conducive to the reasonable distribution of the front and rear lens groups in space, and is conducive to reducing the aberration of the optical system.

[0064] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5<f5 / f3+f6 / f4<1.0, wherein f3 is the effective focal length of the third lens, 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, f5, f3, f6, and f4 may further satisfy: 0.6<f5 / f3+f6 / f4<0.9. Satisfying 0.5<f5 / f3+f6 / f4<1.0 is conducive to the reasonable allocation of the optical power of the optical system to reduce the tolerance sensitivity of each lens.

[0065] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5<SAG61 / SAG52<1.0, wherein 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, and SAG61 is the distance from the intersection of the object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object side surface of the sixth lens on the optical axis. Satisfying 0.5<SAG61 / SAG52<1.0 can optimize the surface features of the fifth lens and the sixth lens, ensure that the opening angle of the object side surface of the sixth lens is smaller than the opening angle of the image side surface of the fifth lens, and help ensure that the optical system has good imaging stability.

[0066] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -1.0<SAG32 / SAG21<-0.5, wherein SAG21 is the distance from the intersection of the object side surface of the second lens and the optical axis to the effective radius vertex of the object side surface of the second lens on the optical axis, and SAG32 is the distance from the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens on the optical axis. More specifically, SAG32 and SAG21 may further satisfy: -1.0<SAG32 / SAG21<-0.6. Satisfying -1.0<SAG32 / SAG21<-0.5 can not only optimize the surface features of the third lens and the second lens, ensure that the optical system has good imaging stability, but also facilitate processing.

[0067] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.3<ET1 / ET6<0.8, where ET1 is the edge thickness of the first lens and ET6 is the edge thickness of the sixth lens. Satisfying 0.3<ET1 / ET6<0.8 can improve the reliability of lens molding and lens assembly.

[0068] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5<ET3 / DT31+ET4 / DT42<1.0, wherein ET3 is the edge thickness of the third lens, ET4 is the edge thickness of the fourth lens, DT31 is the maximum effective radius of the object side of the third lens, and DT42 is the maximum effective radius of the image side of the fourth lens. More specifically, ET3, DT31, ET4, and DT42 may further satisfy: 0.6<ET3 / DT31+ET4 / DT42<1.0. Satisfying 0.5<ET3 / DT31+ET4 / DT42<1.0 is conducive to the processing, molding, and assembly of the third lens and the fourth lens.

[0069] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5<DT12 / DT61<1.0, wherein DT12 is the maximum effective radius of the image side of the first lens, and DT61 is the maximum effective radius of the object side of the sixth lens. More specifically, DT12 and DT61 may further satisfy: 0.5<DT12 / DT61<0.8. Satisfying 0.5<DT12 / DT61<1.0 can optimize the spatial size distribution of the first lens to the sixth lens, which is beneficial to the assembly and manufacturing of the lens.

[0070] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5<R3 / R4+R12 / R8<1.0, wherein R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, R8 is the radius of curvature of the image side surface of the fourth lens, and R12 is the radius of curvature of the image side surface of the sixth lens. More specifically, R3, R4, R12, and R8 may further satisfy: 0.6<R3 / R4+R12 / R8<0.9. Satisfying 0.5<R3 / R4+R12 / R8<1.0 is conducive to reasonably adjusting and distributing the contribution of the second lens, the fourth lens, and the sixth lens to the system aberration.

[0071] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.3<(f1+f2) / (f1-f2)<0.8, where f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens. More specifically, f1 and f2 may further satisfy: 0.5<(f1+f2) / (f1-f2)<0.8. Satisfying 0.3<(f1+f2) / (f1-f2)<0.8 can effectively constrain the spherical aberration contribution of the first lens and the second lens to the system, so that the on-axis field of view can obtain good imaging quality.

[0072] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5<R10 / f-R1 / f<1.0, wherein f is the total effective focal length of the optical imaging lens, R1 is the radius of curvature of the object side surface of the first lens, and R10 is the radius of curvature of the image side surface of the fifth lens. More specifically, R10, f, and R1 may further satisfy: 0.5<R10 / f-R1 / f<0.8. Satisfying 0.5<R10 / f-R1 / f<1.0 can constrain the radius of curvature of the object side surface of the first lens and the image side surface of the fifth lens within a reasonable range, which is conducive to the reasonable control of the image quality within the inner field aperture band.

[0073] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5<(CT1+CT2) / (CT5+CT6)<1.0, wherein CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, 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. Satisfying 0.5<(CT1+CT2) / (CT5+CT6)<1.0 is conducive to improving the uniformity of the thickness of each lens and the reliability of lens processing.

[0074] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.6<(CT3+CT4) / ΣAT<1.1, wherein CT3 is the center thickness of the third lens on the optical axis, CT4 is the center thickness of 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. Satisfying 0.6<(CT3+CT4) / ΣAT<1.1 can not only ensure that the total length of the optical system is within a reasonable range, but also optimize the uniformity of the thickness of each lens in the system.

[0075] In an exemplary embodiment, the optical imaging lens according to the present application further includes an aperture arranged between the second lens and the third lens. Optionally, the above-mentioned optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The present application proposes an optical imaging lens with the characteristics of miniaturization, ultra-thinness, large image surface, large aperture and high imaging quality. The optical imaging lens 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 the on-axis spacing between each lens, etc., the incident light can be effectively converged, the total optical length of the imaging lens can be reduced, and the processability of the imaging lens can be improved, so that the optical imaging lens is more conducive to production and processing.

[0076] 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.

[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 can be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiments, the optical imaging lens is not limited to including six lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0078] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0079] Example 1

[0080] The following reference Figures 1 to 2D An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown.

[0081] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, an aperture STO, 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 negative optical power, and its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive optical power, and its object side surface S5 is convex, and its image side surface S6 is convex. 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 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.

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

[0084]

[0085]

[0086] Table 1

[0087] In this example, the total effective focal length f of the optical imaging lens is 4.54 mm, the total length TTL of the optical imaging lens (i.e., the distance from the object-side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens on the optical axis) is 6.98 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.97 mm, the ratio f / EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field of view FOV of the optical imaging lens is 96.7°.

[0088] 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:

[0089]

[0090] 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 .

[0091] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.3085E-01 -4.7398E-02 9.4998E-03 -3.1034E-03 9.3559E-04 -3.5183E-04 1.1920E-04 S2 3.2753E-01 -1.3090E-02 2.1265E-03 -5.5982E-04 1.4223E-04 -3.0131E-05 2.8453E-05 S3 2.7281E-02 6.6911E-03 2.6251E-04 7.1989E-04 1.7542E-04 6.6243E-05 3.0722E-05 S4 -2.4594E-02 3.4759E-03 2.8477E-04 2.0158E-04 3.9104E-05 1.1354E-05 5.2828E-06 S5 -7.9110E-02 -6.5822E-03 -6.2037E-04 -8.1551E-05 -8.7442E-06 -1.0939E-05 -3.3361E-06 S6 -1.8970E-01 -7.7262E-03 -2.3694E-03 -6.1805E-04 -1.7812E-04 -5.7348E-05 -1.0495E-05 S7 -2.6507E-01 1.5718E-02 -5.9763E-04 -7.8804E-04 -2.7412E-04 -4.1767E-05 -3.3334E-05 S8 -2.3244E-01 4.7202E-02 -1.5629E-03 6.2431E-04 1.4454E-04 -1.8486E-04 -7.7120E-05 S9 -2.4829E-02 3.5725E-02 2.5995E-03 -4.7155E-03 -7.2186E-04 -5.2457E-04 2.4797E-04 S10 4.6722E-01 5.8444E-02 -4.2685E-03 -3.2263E-02 3.8790E-03 3.1646E-03 5.8731E-04 S11 -1.5138E+00 6.0688E-01 -1.5360E-01 1.5834E-02 -1.4911E-03 4.6789E-03 -1.6535E-03 S12 -1.0057E+01 1.2945E+00 -5.1178E-01 2.1902E-01 -1.1192E-01 3.1056E-02 -3.3628E-02

[0092] Table 2-1

[0093] Face number A18 A20 A22 A24 A26 A28 A30 S1 -7.1374E-05 1.6398E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -2.4568E-05 1.6769E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 3.0686E-06 1.1956E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -3.0338E-07 -3.2793E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 4.1242E-07 2.2801E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 1.0527E-06 5.5335E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -4.1537E-06 -1.1931E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 2.3311E-05 9.1454E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 2.2403E-04 8.1430E-05 5.7306E-05 7.8431E-05 3.4322E-05 0.0000E+00 0.0000E+00 S10 -1.5931E-03 -1.4632E-04 2.3979E-04 2.9056E-04 2.0300E-05 0.0000E+00 0.0000E+00 S11 -1.2065E-03 8.6715E-04 -1.7404E-04 1.0063E-04 -1.9256E-04 1.6918E-04 -5.2779E-05 S12 2.6670E-03 -1.0401E-02 2.3301E-03 -3.9607E-04 2.2730E-03 7.5186E-04 6.7833E-04

[0094] Table 2-2

[0095] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 2B The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 2C The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 2D The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 2A to FIG. 2D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0096] Example 2

[0097] The following reference Figures 3 to 4D The optical imaging lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown.

[0098] like Figure 3 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, an aperture STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0099] The first lens E1 has negative optical power, and its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive optical power, and its object side surface S5 is concave, and its image side surface S6 is convex. 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 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.

[0100] In this example, the total effective focal length f of the optical imaging lens is 4.31 mm, the total length TTL of the optical imaging lens is 7.26 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.79 mm, the ratio f / EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field of view FOV of the optical imaging lens is 97.6°.

[0101] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). 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.

[0102]

[0103] Table 3

[0104] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.1527E-01 -4.6086E-02 1.1878E-02 -3.0416E-03 1.0187E-03 -3.0989E-04 1.1287E-04 S2 3.2266E-01 -1.5151E-02 4.2025E-03 -5.6685E-04 2.7491E-04 -2.5190E-05 2.1906E-05 S3 3.1181E-02 9.5746E-03 1.8832E-03 1.0677E-03 3.5929E-04 1.3938E-04 5.5100E-05 S4 -2.1561E-02 5.7321E-03 7.0696E-04 4.6184E-04 1.1993E-04 4.7148E-05 1.0878E-05 S5 -8.5459E-02 -7.6360E-03 -4.7492E-04 1.4408E-04 1.0021E-04 4.0523E-05 1.2483E-05 S6 -1.8812E-01 -5.6356E-03 -3.3470E-03 -4.9736E-04 -1.8819E-04 -4.0193E-05 8.3521E-06 S7 -2.5688E-01 2.3885E-02 -1.9154E-03 -7.5713E-05 -1.8248E-04 -3.4984E-05 -2.3345E-05 S8 -1.8935E-01 4.6676E-02 -5.0133E-03 1.2256E-03 -1.0977E-04 -2.6271E-04 -5.9871E-05 S9 4.9143E-02 5.0320E-02 -2.9121E-03 -5.1604E-03 7.6584E-04 -3.2527E-04 1.4424E-04 S10 5.6572E-01 6.9477E-02 1.6204E-02 -3.9959E-02 9.2927E-03 2.1975E-03 5.5927E-04 S11 -1.5556E+00 5.9744E-01 -1.5542E-01 1.7526E-02 2.7701E-03 -4.2960E-03 4.7744E-04 S12 -1.0979E+01 1.1990E+00 -6.1957E-01 1.9380E-01 -1.1699E-01 3.5026E-02 -3.0454E-02

[0105] Table 4-1

[0106]

[0107]

[0108] Table 4-2

[0109] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 4B The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 4C The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 4D The magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 4A to 4D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0110] Example 3

[0111] The following reference Figures 5 to 6D An optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0112] like Figure 5 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, an aperture STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0113] The first lens E1 has negative focal power, and its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, 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.

[0114] In this example, the total effective focal length f of the optical imaging lens is 4.50 mm, the total length TTL of the optical imaging lens is 7.40 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.79 mm, the ratio f / EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field of view FOV of the optical imaging lens is 92.1°.

[0115] Table 5 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). 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.

[0116]

[0117] Table 5

[0118] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.1715E-01 -4.4745E-02 1.1339E-02 -2.8811E-03 9.1717E-04 -2.7960E-04 9.8039E-05 S2 3.0898E-01 -1.6219E-02 3.7062E-03 -8.6361E-04 3.0431E-04 -9.3226E-05 4.4085E-05 S3 4.1209E-02 6.8630E-03 7.8423E-04 2.0641E-04 9.7232E-05 1.5883E-05 1.0131E-05 S4 -1.8391E-02 4.4570E-03 1.9710E-04 2.2199E-04 2.5907E-05 7.3316E-06 -6.6269E-06 S5 -8.7081E-02 -9.1970E-03 -1.4737E-03 -2.9307E-04 -5.1097E-05 -1.3370E-05 2.5561E-06 S6 -1.8849E-01 -7.1506E-03 -3.9205E-03 -5.6349E-04 -1.8517E-04 -2.4569E-05 2.1251E-05 S7 -2.6701E-01 2.3622E-02 -2.2451E-03 9.7390E-05 -1.3726E-04 -3.9248E-05 -2.0663E-05 S8 -2.1062E-01 4.9363E-02 -3.7016E-03 8.9437E-04 -1.2726E-04 -1.9772E-04 6.6839E-06 S9 7.8763E-02 4.3911E-02 -5.2955E-03 -3.7585E-03 1.0267E-03 -1.6460E-04 1.8587E-04 S10 5.7335E-01 4.4439E-02 1.0959E-02 -3.0970E-02 7.2113E-03 1.0943E-03 1.0937E-03 S11 -1.3363E+00 4.9141E-01 -1.4257E-01 3.0819E-03 -7.4116E-04 -2.4748E-03 -3.9237E-03 S12 -1.0766E+01 1.4153E+00 -5.5902E-01 2.1492E-01 -1.1839E-01 3.4483E-02 -4.9655E-02

[0119] Table 6-1

[0120]

[0121]

[0122] Table 6-2

[0123] Fig. 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 6B The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.6D The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 6A to FIG. 6D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0124] Example 4

[0125] The following reference Figures 7 to 8D An optical imaging lens according to Embodiment 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown.

[0126] like Figure 7 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, an aperture STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0127] The first lens E1 has negative optical power, and its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive optical power, and its object side surface S5 is concave, and its image side surface S6 is convex. 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.

[0128] In this example, the total effective focal length f of the optical imaging lens is 4.40 mm, the total length TTL of the optical imaging lens is 6.98 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.60 mm, the ratio f / EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field of view FOV of the optical imaging lens is 93.3°.

[0129] Table 7 shows the basic parameters of the optical imaging lens of Example 4, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). 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.

[0130]

[0131]

[0132] Table 7

[0133] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.2846E-01 -4.5886E-02 1.2004E-02 -3.0266E-03 9.8712E-04 -3.0421E-04 1.1439E-04 S2 3.1800E-01 -1.1144E-02 4.2695E-03 -5.3851E-04 3.0226E-04 -5.1565E-05 4.3215E-05 S3 3.8671E-02 6.2072E-03 3.9495E-04 2.9643E-04 1.0858E-04 2.5250E-05 1.8942E-05 S4 -2.4283E-02 2.5304E-03 2.4286E-05 1.6260E-04 1.8419E-05 9.3210E-06 -4.8624E-07 S5 -9.6385E-02 -9.3234E-03 -1.4572E-03 -3.7215E-04 -8.2696E-05 -2.1079E-05 8.0772E-06 S6 -2.0828E-01 -9.4259E-03 -5.4778E-03 -6.5157E-04 9.1829E-05 2.7300E-04 2.1878E-04 S7 -2.7921E-01 2.1539E-02 -4.5626E-03 -7.0458E-04 -2.3114E-04 -1.2479E-04 -5.3653E-05 S8 -2.1365E-01 4.6073E-02 -3.6536E-03 1.7274E-03 -1.7508E-04 -6.2647E-04 -4.8092E-05 S9 6.5597E-02 3.9536E-02 3.2910E-03 -6.1277E-03 -4.5846E-04 -4.0185E-04 6.1669E-04 S10 5.3615E-01 3.2272E-02 -8.2231E-03 -3.2210E-02 1.3393E-02 3.9953E-03 -3.4881E-04 S11 -9.8251E-01 5.1972E-01 -1.8322E-01 3.5871E-02 2.4825E-03 -3.1912E-03 1.1701E-04 S12 -1.0915E+01 1.4330E+00 -6.0060E-01 1.6694E-01 -1.2270E-01 4.3485E-02 -4.1493E-02

[0134] Table 8-1

[0135]

[0136]

[0137] Table 8-2

[0138] Fig. 8A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 8CThe distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.8D The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 8A to FIG. 8D It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0139] Example 5

[0140] The following reference Figures 9 to 10D An optical imaging lens according to Embodiment 5 of the present application is described. Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown.

[0141] like Fig. 9 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, an aperture STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0142] The first lens E1 has negative power, its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has positive power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative power, its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive power, its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative power, 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.

[0143] In this example, the total effective focal length f of the optical imaging lens is 4.41 mm, the total length TTL of the optical imaging lens is 6.98 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.60 mm, the ratio f / EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field of view FOV of the optical imaging lens is 93.5°.

[0144] Table 9 shows the basic parameters of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). 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 shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0145]

[0146]

[0147] Table 9

[0148] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.3220E-01 -4.7063E-02 1.1187E-02 -3.1293E-03 9.5859E-04 -3.0673E-04 1.1328E-04 S2 3.1916E-01 -1.1352E-02 3.0601E-03 -7.5443E-04 2.2020E-04 -6.6932E-05 4.2128E-05 S3 3.5503E-02 6.2456E-03 2.8197E-04 2.0254E-04 7.9711E-05 3.8570E-06 1.7436E-05 S4 -1.7902E-02 4.5648E-03 6.0739E-04 2.8828E-04 6.4427E-05 1.7496E-05 -2.9328E-07 S5 -9.3905E-02 -8.8212E-03 -1.0721E-03 -1.9558E-04 -2.3650E-05 -2.8328E-06 1.1372E-05 S6 -2.0849E-01 -9.0994E-03 -4.3756E-03 -8.6300E-04 -1.1084E-04 7.8166E-05 1.0887E-04 S7 -2.7345E-01 2.7319E-02 -2.4630E-03 -8.6676E-04 -7.6007E-05 -4.8647E-05 -2.3166E-05 S8 -2.0195E-01 4.8687E-02 -4.8111E-03 1.3703E-03 1.4372E-04 -5.6559E-04 -3.7732E-05 S9 5.7503E-02 3.5761E-02 1.6255E-02 -4.1787E-03 -4.7267E-03 -2.6114E-03 1.0175E-03 S10 8.1799E-01 4.4062E-03 1.4006E-02 -2.1726E-02 5.6896E-03 1.1056E-03 8.5241E-04 S11 -1.0004E+00 5.0692E-01 -1.8547E-01 3.7352E-02 9.4700E-04 -1.6098E-03 1.7606E-05 S12 -1.0431E+01 1.3225E+00 -6.1245E-01 1.8442E-01 -1.1308E-01 3.8549E-02 -4.6002E-02

[0149] Table 10-1

[0150] Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.4318E-05 4.5078E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -1.7044E-05 2.1247E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -6.0929E-07 1.0357E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -3.6818E-06 -1.7780E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 7.9560E-06 6.7485E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 6.5800E-05 2.7769E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -6.3378E-06 -2.7409E-06 -4.7819E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 2.3766E-05 1.5892E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 9.0637E-04 -5.4878E-06 -2.2984E-04 -4.3432E-05 2.6192E-05 0.0000E+00 0.0000E+00 S10 -9.1602E-04 -2.0010E-04 -2.2292E-04 3.3884E-05 8.0730E-05 5.1396E-05 -2.0949E-05 S11 -4.4686E-04 1.0332E-03 -8.1197E-04 4.7765E-04 -3.8010E-04 2.0982E-04 -4.4164E-05 S12 -9.3621E-03 -1.8591E-02 2.5817E-04 -3.1371E-04 2.9010E-03 1.1168E-03 9.5417E-04

[0151] Table 10-2 Fig. 10A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 10B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 10C The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig. 10D The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 10A to FIG. 10D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0152] Example 6

[0153] The following reference Figures 11 to 12D An optical imaging lens according to Embodiment 6 of the present application is described. Fig.11 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0154] like Fig.11 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, an aperture STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0155] The first lens E1 has negative optical power, and its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive optical power, and its object side surface S5 is concave, and its image side surface S6 is convex. 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 concave, 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.

[0156] In this example, the total effective focal length f of the optical imaging lens is 4.40 mm, the total length TTL of the optical imaging lens is 7.02 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.79 mm, the ratio f / EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field of view FOV of the optical imaging lens is 93.3°.

[0157] Table 11 shows the basic parameters of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). 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 shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0158]

[0159]

[0160] Table 11

[0161] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.3361E-01 -4.4407E-02 1.2365E-02 -2.8391E-03 1.0292E-03 -2.9446E-04 1.1170E-04 S2 3.1928E-01 -1.5087E-02 4.8405E-03 -6.6712E-04 4.0454E-04 -7.1830E-05 5.3724E-05 S3 3.6948E-02 4.6170E-03 7.7313E-04 4.8524E-04 2.3681E-04 6.4353E-05 3.0392E-05 S4 -2.5418E-02 2.3974E-03 9.7477E-05 2.1406E-04 2.7415E-05 1.2006E-05 -3.6409E-07 S5 -9.9000E-02 -1.0371E-02 -1.7642E-03 -4.6988E-04 -1.2607E-04 -4.0247E-05 -9.6572E-07 S6 -2.1594E-01 -1.4023E-02 -5.6922E-03 -1.5245E-03 -3.4783E-04 2.1189E-05 1.0517E-04 S7 -2.7679E-01 1.4710E-02 -4.8644E-03 -1.4808E-03 -7.6608E-04 -3.1736E-04 -1.5480E-04 S8 -2.4164E-01 4.6425E-02 -6.0878E-03 1.1942E-03 6.6337E-05 -4.7925E-04 3.5782E-05 S9 -5.6180E-02 5.1654E-02 -7.5486E-03 -5.6789E-04 7.7677E-04 -8.0517E-04 4.2228E-04 S10 6.1255E-01 5.7301E-02 6.3291E-03 -2.5236E-02 6.8696E-03 1.4057E-03 2.5234E-04 S11 -9.5891E-01 5.3085E-01 -1.9393E-01 3.5744E-02 4.3897E-03 -1.2406E-03 -1.0670E-03 S12 -9.8294E+00 1.4126E+00 -6.2469E-01 1.6429E-01 -1.2061E-01 4.2256E-02 -3.4710E-02

[0162] Table 12-1

[0163] Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.8933E-05 5.9452E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -1.7910E-05 3.1618E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 4.4082E-06 2.6789E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -2.0562E-06 -8.5495E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 3.9257E-06 6.3633E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 6.6579E-05 2.6594E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -5.3506E-05 -2.4601E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 4.1405E-05 2.4826E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 -3.4484E-05 -3.5812E-05 3.2847E-07 1.1578E-05 -3.4634E-06 0.0000E+00 0.0000E+00 S10 -9.9539E-04 2.4041E-04 6.0669E-05 3.2339E-05 -2.5517E-05 0.0000E+00 0.0000E+00 S11 1.1685E-04 7.9893E-04 -7.2890E-04 3.6092E-04 -3.1347E-04 1.0450E-04 5.9739E-06 S12 1.8924E-03 -1.3228E-02 9.0739E-05 -2.9631E-03 6.3053E-05 -8.1840E-04 3.1662E-04

[0164] Table 12-2

[0165] Fig. 12A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 12B The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.12D The magnification chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 12A to FIG. 12D It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0166] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0167] Conditional / Example 1 2 3 4 5 6 f / I 0.92 0.90 0.94 0.96 0.96 0.92 R6 / R2 0.68 0.57 0.62 0.58 0.66 0.73 f345 / f12 0.39 0.27 0.37 0.41 0.35 0.41 f5 / f3+f6 / f4 0.71 0.80 0.73 0.65 0.71 0.62 SAG61 / SAG52 0.88 0.74 0.90 0.52 0.60 0.90 SAG32 / SAG21 -0.79 -0.94 -0.83 -0.71 -0.68 -0.68 ET1 / ET6 0.40 0.49 0.54 0.74 0.70 0.40 ET3 / DT31+ET4 / DT42 0.72 0.93 0.86 0.73 0.69 0.70 DT12 / DT61 0.62 0.62 0.70 0.57 0.61 0.64 R3 / R4+R12 / R8 0.62 0.82 0.71 0.71 0.75 0.66 (f1+f2) / (f1-f2) 0.65 0.75 0.73 0.65 0.59 0.73 R10 / f-R1 / f 0.66 0.76 0.58 0.63 0.61 0.61 (CT1+CT2) / (CT5+CT6) 0.64 0.63 0.71 0.79 0.89 0.61 (CT3+CT4) / ΣAT 0.73 1.08 0.90 0.68 0.65 0.74

[0168] Table 13

[0169] 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 described above.

[0170] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical imaging lens, characterized in that: Along the optical axis from the object side to the image side, they include: The first lens has a negative optical power, and its object side surface is concave and its image side surface is convex; The second lens has positive refractive power, and its object side surface is convex and its image side surface is concave; A third lens element having positive refractive power and a convex image-side surface; a fourth lens element having negative optical power and a concave image-side surface; a fifth lens element having positive refractive power, the image-side surface of which is convex; and a sixth lens element having negative optical power, whose image side surface is concave; The number of lenses having optical power in the optical imaging lens is six; The maximum field of view FOV of the optical imaging lens satisfies: 92.1°≤FOV≤97.6°; Half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfies: 4.60mm≤ImgH≤4.97mm; The total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1.88≤f / EPD<2; and The curvature radius R2 of the image side surface of the first lens and the curvature radius R6 of the image side surface of the third lens satisfy: 0.57≤R6 / R2≤0.73; The effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 0.59≤(f1+f2) / (f1-f2)≤0.75; A center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, 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: 0.61≤(CT1+CT2) / (CT5+CT6)≤0.

89.

2. The optical imaging lens according to claim 1, wherein: The combined focal length f12 of the first lens and the second lens and the combined focal length f345 of the third lens, the fourth lens and the fifth lens satisfy: 0.27≤f345 / f12≤0.

41.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens, 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: 0.6<f5 / f3+f6 / f4≤0.

80.

4. The optical imaging lens according to claim 1, wherein: 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 and the distance SAG61 from the intersection of the object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object side surface of the sixth lens on the optical axis satisfy: 0.5<SAG61 / SAG52≤0.

90.

5. The optical imaging lens according to claim 1, wherein: A distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the vertex of the effective radius of the object side surface of the second lens on the optical axis and a distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens on the optical axis satisfy: -0.94≤SAG32 / SAG21≤-0.

68.

6. The optical imaging lens according to claim 1, wherein: An edge thickness ET1 of the first lens and an edge thickness ET6 of the sixth lens satisfy: 0.40≤ET1 / ET6≤0.

74.

7. The optical imaging lens according to claim 1, wherein: The edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens, the maximum effective radius DT31 of the object side surface of the third lens, and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy: 0.69≤ET3 / DT31+ET4 / DT42≤0.

93.

8. The optical imaging lens according to claim 1, wherein: The maximum effective radius DT12 of the image-side surface of the first lens and the maximum effective radius DT61 of the object-side surface of the sixth lens satisfy: 0.57≤DT12 / DT61≤0.

70.

9. The optical imaging lens according to claim 1, wherein: A curvature radius R3 of the object side surface of the second lens, a curvature radius R4 of the image side surface of the second lens, a curvature radius R8 of the image side surface of the fourth lens, and a curvature radius R12 of the image side surface of the sixth lens satisfy: 0.6<R3 / R4+R12 / R8≤0.

82.

10. The optical imaging lens according to claim 1, wherein: The total effective focal length f of the optical imaging lens, the curvature radius R1 of the object side surface of the first lens, and the curvature radius R10 of the image side surface of the fifth lens satisfy: 0.58≤R10 / f-R1 / f<0.

8.

11. The optical imaging lens according to any one of claims 1 to 10, characterized in that: The center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the sum ΣAT of the spacing distances between any two adjacent lenses from the first lens to the sixth lens on the optical axis satisfy: 0.65≤(CT3+CT4) / ΣAT<1.

1.

12. The optical imaging lens according to claim 11, wherein: The total effective focal length f of the optical imaging lens and half the diagonal length ImgH of an effective pixel area on an imaging surface of the optical imaging lens satisfy the following: 0.9≤f / ImgH≤0.96.

Images